Protection & Control Sepam 1000 PCRED399039EN

MERLIN

GERIN

MERLIN

GERIN

MERLIN

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MERLINGERIN

sepam

I1=

162A

I2=

161A

I3=

163A

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reset

I on

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Io >> 51n

Io > 51n

I >> 51

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0 off

clear

I > 51

Protectionand control

Sepam rangeSepam 1000+

SubstationTransformerMotorBusbar

Sepam 1000+2

Presentation

Contents page

presentation / description 2selection table 6metering 7protection 8control and monitoring 12functional and connection schemes 13other connection schemes 15logic inputs and outputs 16optional modules 18communication 19metering functions 22diagnosis functions 26protection functions 30control and monitoring functions 60parameter and protection settings 64default parameter setting 66characteristics 68ordering information

Sepam 1000+ is a simple, reliable range of protectionand metering units designed for the operation ofmachines and the electrical distribution networks ofindustrial installations and utility substations for alllevels of voltage.

Sepam 1000+ provides you with:

More solutionsA protection unit suited to each applicationrequirement, providing an optimum cost/function ratio.

The Sepam 1000+ range includes different typesof units for different applications:c Sepam 1000+ S20: substation (incomers andfeeders) protection,c Sepam 1000+ T20: transformer protection,c Sepam 1000+ M20: motor protection,c Sepam 1000+ B21, B22: voltage metering andprotection functions for busbars.

More performancesProtectionsComplete 3 phase (RMS current measurement) andearth fault protection unit, including 4 relays dividedinto 2 groups of 2 relays with a choice of trippingcurves, with switching from one group to the othercontrolled by a logic input or remote control.c Earth fault protection insensitivity to transformerclosing.c Detection of phase unbalance.c RMS thermal protection which takes into accountexternal operating temperature and ventilationoperating rates.

Logic discriminationSepam 1000+ utilizes logic discrimination, whichensures fast, selective overcurrent protection trippingwithout requiring the use of time intervals betweenupstream and downstream protection devices.

CommunicationTotally compatible with MODBUS communicationstandard. Includes all the necessary accessories andconnectors for ready-to-use 2-wire or 4-wire RS485communication.

Diagnosis functionThe unit takes into account 3 levels of diagnostic information for better operation:c network diagnosis (tripping current, unbalance ratio, disturbance recording…),c switchgear diagnosis (cumulative breaking current, operating time),c diagnosis of the protection unit and additional modules (self-testing results,watchdog,…).

Program logic and monitoringPreprogrammed circuit breaker and annunciation program logic that requires noauxiliary relays or additional wiring, for fast, dependable commissioning.

More modularityIn order to adapt to the greatest number of application cases and allow subsequentinstallation upgrading, the unit has optional modules that may be added at any time:c logic input/output module with parameterizable program logic,c communication,c temperature sensor module,c analog output module.

More simplicityInstallationc Motor thermal protection setting based on machine manufacturer data.For integration in cubicles without any constraints, the unit can be installed:c on the front panel of the cubicle, reduced depth (< 100 mm),c inside the cubicle low voltage compartment, with the UMI installed in the mostappropriate operation location,c reduced steady state consumption (< 3.5 W) by the unit limits the sizing of auxiliarysupply batteries.

User-friendlinessUser-friendly and high-performing software provides the PC computer resources forSepam 1000+ parameter setting and operation, such as:c uploading and downloading of setting files,c time setting in “TMS” (Time Multiplier Setting) or 10 I/Is mode,c language change for operating menus and messages.

OperationAll information such as metering, settings, events and disturbance records can beaccessed locally, or remotely via the communication link.

Clarity of informationc Clear indication of faults,c Indication of the faulty phase by reading and storage of tripping currents on eachphase,c Real primary value display of variables (A, kA, V, kV),c Instant indication whenever a set point is exceeded.

User machine interface (UMI)Several levels of totally parameterizable UMI are available according to the user'sneeds. Sepam 1000+ can be adapted into the local operating language.

Sepam 1000+ 3

Description

Flexible architecture

(1) Optional additional module.(2) Example, the prefabricated cords come in 3 different lengths.

ACE 949-2 (2-wire) moduleACE 959 (4-wire)communicationnetwork interface

module MES 1084 logic outputs,4 logic inputsor MES 1144 logic outputs,10 logic inputs

CCA 783

Sepam 1000base unit

SFT 2841parameter settingand operation software

SFT 2826 disturbancerecording restoring software

MERLINGERIN

sepam

CCA 772

CCA 612

I1=

162A

I2=

161A

I3=

163A

+

(1)(1)

(1)

(2)reset

I onTrip

ext

Io >> 51n

Io > 51n

I >> 51

I>51

on

0 off

clear

MET 148 module8 temperaturesensor inputs

(1)

MSA 141 module1 analog output

(1)

CCA 770(2)

Sepam 1000+4

reset

I onextIo >> 51NIo > 51NI> > 51I>51on 0 off

clear

I1 = 162AI2 = 161AI3 = 163A

Trip

Description (cont’d)

Front panelSepam 1000+ has two levels of UMI (User machineinterface) suited to each operating requirement:

“Standard UMI”This UMI includes:c 2 signal lamps indicating Sepam operating status:v green “on” indicator: device on,v red “wrench” indicator: device unavailable(initialization phase or detection of an internal failure),c 9 parameterizable yellow signal lamps equippedwith standard text label (1),c “reset” button for clearing faults and resetting,c 1 connection port for the RS232 link with the PC(CCA783 cord), the port is protected by a slidingcover.

This UMI offers a low-cost solution for installationsthat do no require local operation (run from a remotecontrol and monitoring system) or to replaceelectromechanical or analog electronic protectiondevices without any additional operatingrequirements.

“Fixed advanced UMI”In addition to the standard UMI functions, this versionprovides:c a “graphic” LCD display for the display ofmeasurements, parameter/protection settings andalarm and operating messages.

The number of lines, size of characters and symbolsare in accordance with screens and languageversions.c a 9-key keypad with two modes of use:

White keys for current operation:1 display of measurements,2 display of “switchgear, network diagnosis” data,3 display of alarm messages,4 resetting,5 acknowledgment and clearing of alarms.

Blue keys for parameter and protection setting:7 access to protection settings,8 access to Sepam parameter settings (2),9 used to enter the 2 passwords required to changeprotection and parameter settings.

The “ ↵, , ” keys ( 4 , 5 , 6 ) are used to navigatein the menus and to scroll and accept the valuesdisplayed.

6 “lamp test” keys:switching on sequence of all the signal lamps.

This UMI is an optimum solution for local operationfacilitated by clear legibility and data content andaccess.

Remote “advanced UMI”This UMI may be added to the Sepam base unit via prefabricated CCA 770,CCA 772 or CCA 774 cords (depending on the distance).

With reduced depth and the same functions as the fixed version, it may be installedon the front panel of the cubicle in the most appropriate location for operation.

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1

2

3

Example of standard UMI with standard indicator assignment.

Example of advanced UMI with standard indicator assignment.

(1) this removable label may be replaced by a customized label made using the SFT 2841software package.(2) the "expert UMI" is required for parameterization of the program logic.

reset

0 off I on TripextI >> 51I>51on Io >> 51NIo > 51N

Sepam 1000+ 5

e.g. measurement display screen (Sepam M20).

e.g. phase overcurrent protection setting screen.

“Expert UMI”This UMI is available as a complement to theStandard or Advanced UMI on the screen of a PCequipped with the SFT2841 software package andconnected to the RS232 link on the front panel of theSepam (operating in a Windows > V95 or NTversion).

All the data used for the same task are groupedtogether in the same screen to facilitate operation.Menus and icons are used to provide fast, directaccess to the information.

Current operationc display of all metering and operating data,c display of alarm messages with the time format(date, hour, mn, s),c display of diagnostic data such as:v tripping current,v number of switchgear operations and cumulativebreaking current,c display of all protection and parameter settings,c display of the logic status of inputs, outputs andsignal lamps.

This UMI offers the solution suited to occasional localoperation or for demanding personnel who requirefast access to all the information.

Parameter - protection settings (1)

c display and setting of all the parameters of eachprotection function on the same page,c program logic parameter setting, parameter settingof general installation and Sepam data,c input data may be prepared ahead of time andtransferred into the corresponding Sepam units in asingle operation (downloading function).

Main functions performed by SFT2841:c changing of passwords,c entry of general parameters (ratings, integrationperiod, …),c entry of protection settings,c changing of program logic assignments,c enabling/disabling of functions,c saving of files.

Savingc protection and parameter setting data may besaved,c printing of reports is possible as well.

This UMI may also be used to recover disturbancerecording files and provide graphic display using theSFT2826 software package.

Operating assistanceAccess from all the screens to a help function whichcontains all the technical data required for Sepaminstallation and use.

(1) modes available via 2 passwords (protection setting level,parameter setting level).

Sepam 1000+6

functions type of Sepamsubstation transformer motor busbar

protections ANSI code S20 T20 M20 B21(5) B22phase overcurrent (1) 50/51 4 4 4earth fault (or neutral) (1) 50N/51N 4 4 4unbalance / negative sequence 46 1 1 1thermal overload 49 RMS 2 2phase undercurrent 37 1excessive starting time, locked rotor 48/51LR 1starts per hour 66 1positive sequence undervoltage 27D/47 2 2remanent undervoltage 27R 1 1phase-to-phase undervoltage 27 2 2phase-to-neutral undervoltage 27S 1 1phase-to-phase overvoltage 59 2 2neutral voltage displacement 59N 2 2overfrequency 81H 1 1underfrequency 81L 2 2rate of change of frequency 81R 1recloser (4 cycles) 79 vthermostat / Buchholz vtemperature monitoring (2) 38/49T v vmeteringphase current I1,I2,I3 RMS c c cresidual current Io c c caverage current I1, I2, I3 c c cpeak demand phase current IM1,IM2,IM3 c c cline voltage U21, U32, U13 c cphase-to-neutral voltage V1, V2, V3 c cresidual voltage Vo c cpositive sequence voltage / rotation direction c cfrequency c ctemperature measurement (2) v vnetwork diagnosistripping current I1,I2,I3, Io c c cunbalance ratio / negative sequence current Ii c c crunning hours counter / operating time c cthermal capacity used c cremaining operating time before c coverload trippingwaiting time after overload tripping cstarting current and time / overload cstart inhibit time delay, cnumber of starts before inhibitiondisturbance recording c c c c cswitchgear diagnosiscumulative breaking current2 c c ctrip circuit supervision v v v v vnumber of operations v v voperating time v v voperating time v v vself-diagnosiswatchdog c c c c coutput relay test (3) v v v v vcontrol and monitoringcircuit breaker / contactor control (4) v v v v vlogic discrimination v v v4 addressable logic outputs c c c c cadditional modulesMET 148 module - 8 temperature sensor inputs v vMSA 141 module - 1 low level analog output v v v v vMES 108 module - (4I/4S) or MES 114 module - (10I/4O) v v v v vACE 949-2 module - (2-wire) or ACE 959 (4-wire) RS485 interface v v v v v

Selection table

Sepam 1000+

c standard, v according to parameter setting and MES 108 or MES 114 input/output module options.(1) 4 relays with the exclusive possibility of logic discrimination or switching from one 2-relay group of settings to another 2-relay group.(2) with MET 148 sensor option, 2 set points per sensor.(3) with advanced UMI option only.(4) for shunt trip unit or undervoltage release coil according to parameter setting.(5) performs B20 type functions.

Sepam 1000+ 7

Sepam 1000+ displaysthe measurements requiredfor operationThe values are displayed as primary values withthe related units: A, V, Hz, °C, °F, …

Currentsc RMS measurement of the circuit’s 3 phase currents.c Residual current measurement.

Average currents and peak demand currentsMeasurement of the average current on each ofthe 3 phases.Measurement of the greatest average current on eachof the 3 phases.The peak demand currents give the currentconsumed at the time of peak loads.The average current is calculated over a period thatmay be parameterized from 5 to 60 mn. The “clear”key is used to reset the peak demand currents to zerowhen they are on the display.

Tripping currentsStorage of the greatest average value of the 3 phasecurrents and earth current at the time Sepam gavethe last tripping order, to provide the fault breakingcurrent (fault analysis).These values are stored until the next trip orderis given.

Thermal capacity usedMeasurement of the relative capacity used by the load.It is displayed as a percentage of the nominal thermalcapacity.

Voltagesc Calculation or measurement of phase-to-neutralvoltages V1, V2 and V3.c Calculation or measurement of phase-to-phasevoltages U21, U32 and U13.c Calculation of positive sequence voltage Vd.c Calculation of residual voltage Vo.

Frequency: measurement of frequency.

TemperatureMeasurement of the temperature of each sensor.

Motor operationassistance functionMotor starting current and time / motor overloadMeasures the maximum value of current absorbed bythe motor during a starting sequence or at the time ofan overload as well as the duration.

Number of starts before inhibition /start inhibit time delayIndicates the remaining number of starts allowed bythe starts per hour protection, then, if the number iszero, the waiting time before starting is allowed.

Remaining operating time before overload trippingIndicates the time remaining before trippingby the thermal overload protection.

Waiting time after overload trippingIndicates the time remaining before starting is allowedaccording to inhibition by the thermal protection.

Switchgear diagnosis assistance measurementsThese measurements are to be compared with the data supplied by the switchgearmanufacturer.

Cumulative breaking currentThe displayed value may be used to evaluate the state of the circuit breaker poles.

Operating time, charging timeMeasures the device operating time. These data may be used to evaluate the stateof the pole and operating mechanism.

Number of operationsCumulative number of breaker opening operations.

Running hours counter / operating timeCumulative time during which the protected equipment (motor or transformer)is on load (I > 0.1 Ib).The cumulative value is displayed in hours (0 to 65535 h) and savedevery 4 hours.

general parameters (set in the general settings menu)

frequency 50 Hz or 60 Hzphase current 1 A or 5 A CT type nb. (I1,I2,I3) or (I1,I3)sensor rated current In (1) 1 A to 6250 A

LPCT type number (I1, I2, I3)rated current In (1) 25 A to 3150 A

residual current CSH 120/200 typesensor rated current Ino 2 A or 20 A

1 A or 5 A CT + CSH type or core balance CTrated current Ino (1) 1 A to 6250 A

voltage sensor rated primary voltage Unp (2) 220 V to 250 kV

VT: 100, 110, 115, 120 V V1, V2, V3(Uns) U21, U32

U21

TP : 200, 230 V V1, V2, V3metering functions ranges accuracy (7)

phase current 0.1 to 1.5 In (1) typically ±1% (3)

residual current 0.1 to 1.5 Ino (1) ±5%

peak demand current 0.1 to 1.5 In (1) typically ±1%

tripping current phase 0.1 to 40 In (1) ±5%earth 0.1 to 20 Ino (1) ±5%

thermal capacity used 0 to 800 % (4) (3)

unbalance ratio 10 to 500 % Ib (5) ±2%(negative sequence current)voltmeter voltages 0.05 to 1.2 Unp (2) typically ±1%(ph-to-neutral or ph-to-ph) or Vnp (3)

voltmeter positive 0.05 to 1.5 Vnp (2) ±2%sequence voltage

voltmeter residual voltage 0.015 to 3 Vnp (2) ±5%frequency meter 50 / 60 Hz ±5 Hz ±0.05 Hz (3)

temperature -30°C to +200°C (6) ±1°C (3)

operating time 20 to 100 ms typically ±1 ms

charging time 1 to 20 sec ±0.5 secrunning hours counter 0 to 65535 h±1% or ±0.5 h

metering transducer 4-20; 0-20; 0-10 mA ±0.5%

Characteristics

(1) In, Ino: CT primary rated current(2) Unp: rated primary phase-to-phase voltage; Vnp: primary phase-to-neutral voltageVnp = (Unp/e)(3) measurements available in analog format according to parameter setting and MSA 141 module(4) 100% is the thermal capacity used of the equipment being protected under its rated load: I = Ib(5) Ib: base current of the equipment being protected(6) displayed in °C or °F according to parameter setting, typical accuracy from + 20°C to +140°C(7) in reference conditions (IEC 60255-4), typically at In or Un

Metering

Sepam 1000+8

Phase overcurrent (ANSI 50/51)Three-phase protection against overloads and phase-to-phase short-circuits.The protection comprises four units:c IDMT or definite time,c instantaneous or time-delayed.

Sepam 1000+ offers a number of tripping curves:c definite time (DT),c IDMT.

The IDMT curves also include a reset time which is used for:c detection of restriking faults,c coordination with electromechanical relays.

Earth fault (ANSI 50/51N or 50/51G)Connection and equipment earth fault protection.Earth faults may be detected by:c three phase currents (3I sum),c a special core balance CT, CSH120 or CSH200, according to the requireddiameter; this method provides the highest sensitivity. Selection between tworatings (2 A and 20 A) provides a very wide setting range.c a current transformer (1 A or 5 A), combinedwith a CSH30 interposing ring CT.

The protection comprises four units:c IDMT or definite time,c instantaneous or time-delayed.

The characteristic curves are the same as those for the phase current overcurrentprotection.Each set point has a reset time setting (by an adjustable timer hold with definitetime characteristic) that allows restriking faults to be detected.

Each set point has a 2 nd harmonic restraint in order to ensure stability duringtransformer energizing.

Negative sequence / unbalance (ANSI 46)Protection against phase unbalance.Sensitive protection against 2-phase faults on long feeders.Protection of equipment against temperature build-up caused by an unbalancedsupply or wrong phase rotation or the loss of a phase and protection against lowlevels of phase-to-phase overcurrent.IDMT or definite time characteristics.

Thermal overload (ANSI 49)Protection of equipment against thermal damage caused by overloads.

The thermal capacity used is calculated according to a mathematical model whichtakes into account:c RMS current values,c ambient temperature.The function comprises:c an adjustable alarm set point,c an adjustable tripping set point,v transformer application.The model takes into account the transformer heat rise and cooling time constantsaccording to whether natural or forced ventilation is used (ONAN, ONAF) by logicinput.v motor application.The model takes into account:- two time constants: the heat rise time constant, used when the motor is running,and the cooling time constant, used when the motor is stopped,- effect of negative sequence current on rotor heating.

An additional setting may be used to adapt the protection to fit the motor thermalwithstand given by the experimental hot and cold curves provided by theequipment manufacturer.

The thermal protection may be inhibited by a logic input when this is requiredby the process running conditions.

Phase undercurrent (ANSI 37)Protection of pumps against the consequences of a loss of priming.The protection detects time-delayed current drops that correspond to motorno-load operation, characteristic of the loss of pump priming.

Protections

Sepam 1000+ 9

Excessive starting time / locked rotor / (ANSI 48/51LR) (1)

Protection of motors that are liable to start with overloads or insufficient supplyvoltage and/or that drive loads that are liable to jam (e.g. crushers).The locked rotor function is an overcurrent protection that is only confirmed aftera time delay that corresponds to the normal starting time.

Starts per hour (ANSI 66) (1)

Protection against overheating caused by too frequent starts.Checking of the number of:c starts per hour (or adjustable time period),c consecutive starts.The protection inhibits motor energizing for a preset time period once thepermissible limits have been reached.

Recloser (ANSI 79)Automation device used to reclose the circuit breaker after tripping triggered by atransient fault on a line (the function includes 4 parameterizable reclosing cycles).

Thermostat, Buchholz (temperature, gas and pressure detector)Protection of transformers against temperature rises and internal faults via logicinputs linked to devices integrated in the equipment.

Temperature monitoring (RTDs) (ANSI 38/49T)Protection against abnormal overheating of motor windings and/or bearingsequipped with RTDs.The protection includes 2 independent set points that are adjustable for each RTD.

Positive sequence undervoltage (ANSI 27D), (ANSI 47)Motor protection against malfunctioning due to insufficient or unbalanced supplyvoltage. Detection of phase rotation. In order for this protection to be used, voltagetransformers must be connected to Sepam to measure U21 and U32.

Remanent undervoltage (ANSI 27R)Monitoring of the clearing of voltage sustained by rotating machines after circuitopening. The protection is used to prevent transient electrical and mechanicalphenomena that are caused by fast re-energizing of motors.It monitors phase-to-phase voltage U21 or phase-to-neutral voltage V1.

Phase-to-phase undervoltage (ANSI 27)Protection used either for automated functions (transfer, load shedding) or toprotect motors against undervoltage. The protection monitors the drop in each ofthe phase-to-phase voltages being metered.

Phase-to-neutral undervoltage (ANSI 27S)Protection used to detect phase-to-earth faults (in isolated neutral systems).

Overvoltage (ANSI 59)Protection against abnormally high voltage or checking that there is sufficientvoltage for power supply transfer (set point 1) and checking of phase-to-phasevoltages U32 and U21 (set point 2).

Neutral voltage displacement (ANSI 59N)Detection of insulation faults in ungrounded systems by measurement of neutralvoltage displacement. The protection is generally used with transformer incomersor busbars.The function includes 2 set points.

Overfrequency (ANSI 81H)Protection against abnormally high frequency.

Underfrequency (ANSI 81L)Detection of variances with respect to the rated frequency, in order to maintaina high quality power supply. The protection may be used for overall trippingor for load shedding.

Rate of change of frequency / ROCOF (ANSI 81R)Protection used for fast disconnection of a source feeding a power network when afault occurs or to check load shedding.

(1) possibility of motor re-acceleration to be taken into account by a logic input.

Sepam 1000+10

Setting ranges

Protections (cont’d)

functions settings time delays

phase overcurrenttripping curve holding time

definite time DT

SIT, LTI, VIT, EIT, UIT (1) DTRI DT

CEI : SIT/A, LTI/B, VIT/B, EIT/C DT or IDMT

IEEE : MI (D), VI (E), EI (F) DT or IDMTIAC : I, VI, EI DT or IDMT

Is set point 0.1 to 24 In definite time Inst; 0.05 s to 300 s

0.1 to 2.4 In IDMT 0.1 s to 12.5 s at 10 Is

holding time definite time (timer hold) Inst; 0.05 s to 300 sIDMT (reset time) 0.5 s to 300 s

earth fault

tripping curve holding timedefinite time DT

SIT, LTI, VIT, EIT, UIT (1) DT

RI DT

IEC: SIT/A, LTI/B, VIT/B, EIT/C DT or IDMTIEEE: MI (D), VI (E), EI (F) DT or IDMT

IAC: I, VI, EI DT or IDMT

Is set point 0.1 to 15 Ino definite time Inst; 0.05 s to 300 s0.1 to 1 Ino IDMT 0.1 s to 12.5 s at 10 Iso

holding time definite time (timer hold) Inst; 0.05 s to 300 s

IDMT (reset time) 0.5 s to 300 snegative sequence / unbalance

definite time 0.1 to 5 Ib 0.1 s to 300 s

IDMT 0.1 to 0.5 Ib 0.1 s to 1 s

thermal overload operating rate 1 operating rate 2negative sequence coefficient 0 -2.25-4.5-9

time constant heat rise T1: 5 to 120 mn T1: 5 to 120 mn

cooling T2: 5 to 600 mn T2: 5 to 600 mnalarm; tripping 50 to 300% of normal heat rise

cold curve modification 0 to 100%coefficientoperating rate change condition by Is set point adjustable from 0.25 to 8 Ib (motor)

by logic input I26 (transformer)

maximum equipment temperature 60 to 200 °Cphase undercurrent

0.15 to 1 Ib 0.05 s to 300 s

excessive starting time/ locked rotor

0.5 Ib to 5 Ib ST start time 0.5 s to 300 sLT, LTS time delay 0.05 s to 300 s

general parameters (set in general settings menu)

frequency 50 Hz or 60 Hz

phase current 1 A or 5 A CT type number (I1, I2, I3) or (I1, I3)sensor rated current In 1 A to 6250 A

LPCT type number (I1, I2, I3)rated current In (3) 25 A to 3150 A

residual current CSH 120/200 typesensor rated current Ino 2 A or 20 A

1 A or 5 A CT + CSH type or core balance CT (2)

rated current Ino 1 A to 6250 A

voltage sensor rated primary voltage Unp 220 V to 250 kV

VT: 100, 110, 115, 120 V V1, V2, V3(Uns) U21, U32

U21

VT: 200, 230 V V1, V2, V3

Sepam 1000+ 11

Setting ranges (cont'd)functions settings time delays

starts per hour

1 to 60 per hour hour 1 to 6 h

1 to 60 consecutive time between starts 0 to 90 mn

temperature (RTDs)

0 to 180 °C (or 32 to 356°F)

positive sequence undervoltage

30 to 100 % of Vnp (Unp/e) 0.05 s to 300 s

remanent undervoltage

5 to 100 % of Unp 0.05 s to 300 s

phase-to-phase undervoltage

5 to 100 % of Unp 0.05 s to 300 s

phase-to-neutral undervoltage

5 to 100 % of Vnp 0.05 s to 300 s

phase-to-phase overvoltage

50 to 150 % of Unp 0.05 s to 300 s

neutral voltage displacement

2 to 80 % of Unp 0.05 s to 300 s

overfrequency

50 to 53 Hz or 60 to 63 Hz 0.1 s to 300 s

underfrequency

set point 1 and set point 2 45 to 50 Hz or 55 to 60 Hz 0.1 s to 300 s

rate of change of frequency

0.1 to 10 Hz/s Inst; 0.15 s to 300 s

Note: In current, Unp rated voltage and Ino current are general parameters that are set at the time of Sepam commissioning. They are given as the valueson the metering transformer primary windings.In is the current sensor rated current (CT rating) (adjustable from 1 to 6250 Amps),Unp is the rated phase-to-phase voltage of the voltage sensor primary windings (adjustable from 220V to 250KV),Ino is the core balance CT current rating,Ib is the current which corresponds to the motor power rating, adjustable from 0.4 to 1.3 In.The current, voltage and frequency values are set by direct entry of the values (resolution: 1 A, 1 V, 1 Hz, 1°C or F).(1) tripping as of 1.2 Is.(2) with ACE 990 interface for core balance CT with ratio n of 50 to 1500 turns.(3) table of In values in Amps: 25, 50, 100, 125, 133, 200, 250, 320, 400, 500, 630, 666, 1000, 1600, 2000, 3150.

Sepam 1000+12

Control and monitoring

Sepam 1000+ performs the basic control andmonitoring functions necessary for the operation ofthe electrical network, thereby reducing the need forauxiliary relays.

The control and monitoring functions may beparameterized using the SFT 2841 software package,however each type of Sepam has parameter settingby default which allows easier commissioning in themost frequent cases of use.

Two control modes are availablec Integrated circuit breaker control.This logical function deals with all the circuit breakermaking and breaking conditions based on positiondata, external control and recloser protectionfunctions, etc…c Individual parameter setting of output relays.Control of output relays according to an allocationmatrix.

Breaking device controlSepam is used to control breaking devices equippedwith different types of closing and tripping coils:c circuit breakers with shunt trip or undervoltagetrip units (parameter setting on front panel (1)

or via SFT 2841),c latching contactors with shunt-trip units.

Output relay control (standard or fail-safe) may beset.By default, the program logic is adapted to controla circuit breaker with a shunt trip unit.Open and close control via the communication link.

Latching / acknowledgment (ANSI 86)Output relay latching may be parameterized. Latchedtripping orders are stored and must be acknowledgedin order for the device to be put back into service.

The user acknowledges via the keypad or remotelyvia a logic input or the communication link.

Inhibit closing (ANSI 69)Sepam inhibits the closing of the circuit breaker orcontactor according to the operation conditions.

Inhibit thermal protectionThermal protection tripping may be inhibited via alogic input.

Re-accelerationAllows a logic input to take into account the restartingof an unstopped motor.

Remote trippingCircuit breakers or contactors may be remote-controlled via a logic input or via the communicationlink.

Inhibit remote controlA logic input inhibits the circuit breaker remote controlmode via the communication link.

Switching of settings groupsUsed to switch from on group of phase currentand earth fault protection settings to another one.The switch may be made by a logic input or viathe communication link.

Logic discrimination (ANSI 68)This function allows quick, selective tripping of the phase overcurrent and earthfault protection relays, whether definite time or IDMT, without requiring the useof time intervals between upstream and downstream protection devices.The downstream relay transmits a blocking input signal if the protection devices’set points are exceeded.

The upstream relay receives the blocking input signal on the logic input, used forthe inhibition function. A saving mechanism ensures the operation of the protectionin the event of an inhibition link failure.

Annunciation (ANSI 30)Sepam indicates the appearance of alarms by:c signal lamps on the front panel,c messages on the display.

The addressing of the signal lamps may be parameterized.

The sequence is as follows (advanced UMI):c when an event appears, the signal lamp goes on and the related message isdisplayed,c the user presses the “clear” key to erase the message,c after the fault disappears and the “reset” key is pressed, the signal lamp goes offand the protection is reset,c the list of alarm messages remains accessible ( key) and may be cleared bypressing the “clear” key.

Remote annunciationUsed to remote information via the communication link.Information such as circuit breaker position, SF6 fault alarm, etc.

Trip circuit supervisionDetects trip circuit faults (shunt trip units). Detects open/closed positiondiscrepancy faults (undervoltage trip units).

WatchdogIndicates Sepam unavailability.

Output relay testingThis function is used to activate each output relay (1).

List of main messages (1)

functions messages (2)

overcurrent PHASE FAULT

earth fault EARTH FAULT

thermal overload THERMAL ALARMTHERMAL TRIP

negative sequence / unbalance UNBALANCE

locked rotor ROTOR BLOCKING

excessive starting time LONG START

starts per hour START INHIBIT

undercurrent UNDERCURRENT

overvoltage OVERVOLTAGE

undervoltage UNDERVOLTAGE

positive sequence undervoltage UNDERVOLTAGE

neutral voltage displacement Vo FAULT

overfrequency OVER FREQ.

underfrequency UNDER FREQ.

temperature OVER TEMP TRIP

thermostat (3) THERMOST. TRIP

Buchholz (3) BUCHH/GAS TRIP

recloser PERMANENT FAULT

recloser CLEARED FAULT(1) Sepam equipped with advanced UMI or SFT 2841.(2) messages by default, the wording of the messages may be changed (please consult us).(3) or Temperature, gas, pressure detector.

Sepam 1000+ 13

Functional and connection schemes

S20 / T20 / M20 typesConnection to 1 / 5 A current transformers

L1

L2

L3

14

52

63

18

A

communication

B 4650517950N51N

4649505150N51N

37464950516650N51N51LR

S20 T20 M20

87O2

1110O3

54O1

A

19

1514O4

13

1217

12

+ / ~– / ~

D

C to communicationnetworkinterface

to optionalmodules

(1)

(1) The connector marked A is available as an option for connection by 6.35 mm ring lug terminals.

Other connection scheme* 2 turns for 1 Amp CT,

4 turns for 5 Amps CT.

14

52

63

18

19

A

B

L1 L2 L3

CSH30

*

Sepam 1000+14

B21, B22 type L1

L2

L3

2727S475927D27R59N81H81L

B21

87O2

1110O3

54O1

A

1514O4

13

1217

12

+ / ~– / ~

D

C

B

21

345678

communication

tocommunicationnetworkinterface

to optionalmodules

(2)

(1)

2727S475927D27R59N81H81L81R

B22 (3)

(1) this connection is used to calculate residual voltage.(2) CCT 640 earthing terminal.(3) The connector marked A is available as an option for connection by 6.35 mm eye lugs.

Functional and connection schemes (cont’d)

Sepam 1000+ 15

Other connection schemes

L1

L2

L3

45678

B

321

(1)

45678

L1

L2

L3

B

321

45678

L1

L2

L3

B

321

18

19

Acore balancen turns

3 (L1, L2, L3)

ACE990

S1

S2

E1

En

Phase currentc Connection of two 1 / 5 A current transformersusing the CCA 630 connector.

c Connection of 3 LPCT type current transformersusing the CCA 670 connector(the transformers are fitted with standard connectioncables: L = 5 m).

(2) (2)

(2)

B

L1 L2 L3

CCA 670

L1

L2

L3

18

19

A

3 (L1, L2, L3)

CSH

1 A CT5 A CT

: 2 turns : 4 turns5 A CT

14

52

63

B

L1 L2 L3

CCA 630CCA 630

Residual voltagesBroken delta connection of voltage transformers forresidual voltage measurement.

Phase voltageConnection of 1 voltage transformer:(does not allow use of positive sequenceundervoltage or neutral voltage displacementprotections or measurement of residual and positivesequence voltages).

Connection of 2 voltage transformers in Varrangement (does not allow use of neutral voltagedisplacement or measurement of residual voltage).

Residual currentc Connection of CSH interposing ring CTs to 1 Acurrent transformers:make 2 turns through the CSH primary winding.

c Connection of CSH interposing ring CTs to 5 Acurrent transformers:make 4 turns through the CSH primary winding.

(wiring combined with parameter setting of the typeof CT and its rated current).

c Connection of the ACE 990 interface to the corebalance CT with ratio n of 50 to 1500 turns.

(1) phase voltage metering with 1, 2 or 3 VTs (case shown).(2) CCT 640 earthing terminal.

Sepam 1000+16

O14

O13

O12

O1123

56

89

1112

L

M K

12I21

109

876

45

I24

I26I25

I22I23

I14

I13

I12

I1112

45

78

1011

Rear view of the MES 114 (MES 108) module

LMES108

87

M

O1389

O1256

O1123

O141112

54

21

1110

O13

O12

O11

O14

I13

I12

I11

I14

LMES114

87

M

O1389

O1256

O1123

O141112

54

21

1110

I13

I12

I11

I14

K

7

6

21

510

I23

I22

I21

I24

I25

I26

4

8

9

87O2

1110O3

54O1

A

1514O4

13

1217

12

+ / ~– / ~

base

Logic inputs and outputs

A

M

O1

542

1

I12

I11

D

+_

4

5

A

M

O1

542

1

I12

I11

D

+_

4

5

Wiring for circuit breaker control

The Sepam 1000+ base unit has 4 outputs.

The 4 basic outputs may be extended as an optionby the addition of an MES module which is availablein 2 versions:c MES 108 (4 outputs, 4 inputs)c MES 114 (4 outputs, 10 inputs)

The assignment of the inputs and outputs may be setusing the SFT 2841 software package.

N.B. The inputs are potential-free, the DC supplyis external.

Wiring for shunt trip unit and trip circuitsupervision.

Wiring for undervoltage trip unit andopen/closed discrepancy faultmonitoring.

outputs allocation

O1 tripping

O2 inhibit closing

O4 watchdog

O11 close control

Sepam 1000+ 17

In order for the predefined control and monitoring functions to be used, exclusive parameter setting and special wiring of the inputs arerequired according to the application of the inputs and the type of Sepam (refer to the “Control and monitoring functions" section).

ETOR S20 T20

I11 open position open position

I12 closed position closed position

I13 SSL receive BL A/B switching SSL receive BL A/B switching

I14 external reset external reset

I21 external tripping 1 (1) synchro external tripping 1 (1) synchroexternal network (Buchholz/Gas external network

tripping message)

I22 external tripping 2 (1) external tripping 2 (1)

(thermostat trippingmessage)

I23 external tripping 3 (1) Buchholz alarm (1) external tripping 3 (1)

(Buchholz alarm (pressure trippingmessage) message)

I24 end-of- thermostat alarmt (1) end-of-loading mechanismcharging position (thermostat alarm

message)

I25 RC inhibition (1) SF6-1 RC inhibition (1) SF6-1

I26 inhibit recloser SF6-2 change heat thermal protection SF6-2balance inhibition

Input allocation by application chart

Please note: all of the logic inputs are available via the communication link and may be accessed in the SFT 2841 matrix for other non predefined uses.(1) The settings of these inputs have the prefix “NEG” which represents undervoltage type operation.

ETOR(1) M20 B21 - B22

I11 open position open position

I12 closed position closed position

I13 A/B switching

I14 external reset external reset

I21 external tripping 1 (1) external network synchro external tripping 1 (1) synchroexternal network

I22 external tripping 2 (1) motor re-acceleration external tripping 2 (1)

I23 external tripping 3 (1) motor shaft rotation external tripping 3 (1)

I24 end of loading mechanism

I25 remote control inhibition (1) SF6-1 remote control inhibition (1) SF6-1

I26 thermal protection inhibition change of SF6-2 SF6-2thermal rate

Sepam 1000+18

DSM 303

Da

Da

Dd

MET 148A

n°1

n°2

n°3

n°4

B

n°5

n°6

n°7

n°810

1112

789

456

123

101112

789

456

123

MSA 141ADa

Dd

12

3Rc+

Connection of optional modules

Remote modules

Remote UMI (DSM 303) Temperature sensor inputs (MET 148)

Analog output (MSA 141)

Wiring of inter-module links:The different module connection combinations aremade possible by the use of prefabricated cordswhich come in 3 different lengths:c CCA 770 (L = 0.6 m,c CCA 772 (L = 2 m,.c CCA 774 (L = 4 m).

The modules are linked by these cords which providethe power supply and act as functional links with theSepam unit (D connector to Da connector, …).

The DSM 303 module may only be connected at theend of the link.For the configuration using the 3 optionnals modulessimultaneously, please refer to the schematic above.

Rc < 600 Ω wiring included.

Sepam 1000

CCA 772

CCA 770MERLINGERIN

sepam 1000

+

MET 148 module

DaDd

A

MSA 141 module

MERLIN

GERIN

MERLINGERIN

sepam 1000

Da

A

B

CCA 772(or CCA 774)

remote UMIDSM 303

Dd

Sepam 1000+ 19

Communication

Modbus communication (Jbus profile) may be usedto connect the Sepam units to a remote monitoringand control system equipped with a master Modbuscommunication channel with an RS 485 type physicallink.

Functions supported byModbus communicationSepam’s Modbus protocol supports 11 functions:c function 1: reading of n output or internal bits,c function 2: reading of n input bits,c function 3: reading of n output or internal words,c function 4: reading of n input words,c function 5: reading of 1 bit,c function 6: reading of 1 word,c function 7: high-speed reading of 8 bits,c function 8: reading of diagnosis counters,c function 11: reading of event counters,c function 15: writing of n bits,c function 16: writing of n words.

The following exception codes are supported:c 1: unknown function code,c 2: incorrect address,c 7: not acknowledged (remote reading and setting).

Data availableThe data available depends on the type of Sepam..

Measurement readoutc phase and earth fault currents,c peak demand phase currents,c tripping currents,c cumulative breaking current,c phase-to-phase, phase-to-neutral and residualvoltages,c frequency,c temperatures,c thermal capacity used,c number of starts and inhibit time,c running hours counter,c motor starting current and time,c remaining operating time before overload tripping,c waiting time after tripping,c operating time and number of operations,c circuit breaker loading time.

Program logic data readoutc A table of 64 preassigned remote indications (TS)(depending on the type of Sepam) is used the statusof the program logic data.c Reading the status of 10 digital inputs.

Remote control ordersWriting of 16 impulse type remote control orders (TC)in direct mode or in SBO (Select Before Operate)mode via 16 selection bits

Other functionsc Sepam configuration and identification reading,c time-tagging of events (synchronization by network or externally via logicinput I21), tagging of events within a millisecond accuracy,c remote reading of Sepam protection settings (remote reading),c remote setting of protections (remote setting),c remote control of analog output (1),c transfer of disturbance recording data.

Supervision zoneThis zone includes all the data used by the remote monitoring and control systemand may be accessed in a single reading operation.

Characteristicstype of transmission asynchronous serial

protocol Modbus slave

rate 4800, 9600, 19200, 38400 bauds

data format 1 start, 8 bits, no parity, 1 stop1 start, 8 bits, even parity, 1 stop1 start, 8 bits, odd parity, 1 stop

electrical interface 2-wire differential, complies with EIARS 485 standard

type of connection screw terminals and tightening clamps/shielding continuity

response time less than 15 ms.

maximum length of RS485 number of Sepam connected:distributed power supply (in m) : 5 10 20 25

12 V distributed power supply 320 180 160 125

24 V distributed power supply 1000 750 450 375values obtained with a standard cable (2-pair AWG 24; resistance per unit length 78 Ω / km).values multiplied by 3 with a maximum of 1300 m with specific cable, reference FILECAF2644-1; Schneider approved (refer to "RS485 - Modbus network connection accessoriesinstruction manual", PCRED399074EN).

Implementation of the Modbus networkA set of adaptation accessories is used for dependable implementation of thecommunication network from both the electrical and environmental(electromagnetic compatibility) viewpoints:c network connection interface (ACE949) 1 including the Sepam interfaceconnection cable 3 ,c RS 485 / RS 232(ACE 909) or RS 485 / RS 485 converter (ACE 919) 2 .

These accessories provide a 12 V distributed power supply, and may be used forpolarization and terminal fitting of the communication link.

3

1

MERLIN GERIN MERLIN GERIN MERLIN GERIN

2

(1) with MSA 141 option.

Sepam 1000+20

Assignment of CT (remote control orders)

Remote indications and remote controlordersThe communication link provides Sepam 1000+ with:c 64 remote indications (TS) which correspond to the different states of theprotection and monitoring functions,c 16 remote control orders (TC) may be used to control certain circuit breakerfunctions.

The remote indications (TS) and remote control orders (TC) are pre-assignedaccording to the types of Sepam 1000+ in accordance with the chart opposite.

c 10 digital inputs state.

Remote control modeRemote control orders may be carried out in 2 modes (chosen by overallparameter setting for all remote control orders):c direct mode: the remote control order (TC, transmitted command) is effective assoon as it is received,c “SBO” (select before operate) mode.The SBO mode involves two steps:v selection of the remote control order to be sent (STC),v checking by reading over the selection again,v execution of the associated remote control order (TC).c remote control orders can be globally inhibited via the I25 logic input accordingto the program logic parameter setting.

Communication interface modulesThese moduiles allow simple, dependable implementation of the RS485 link.The power supply for the RS485 communication interfaces is provided, via thenetwork cable, by a single accessory that may be used to connect up to 25modules.A shielded cable is used to wire the distributed power supply.The characteristics of the cable recommended for interconnecting the ACE 949-2or ACE 959 modules are as follows:c twisted pair with tinned copper braid shielding, coverage: > 65%,c characteristic impedance:120 Ω,c gauge: AWG 24,c resistance per unit length: < 100 Ω / km,c capacitance between conductors: < 60 pF/ m,c capacitance between conductor and shielding: < 100 pF/ m.

Example of compatible cable (2-wire network):c supplier: BELDEN, reference: 9842,c supplier: FILOTEX, reference: FMA- 2PS.

Each module is equipped with a 3-meter long CCA 612 prefabricated cableconnected to the C output of Sepam 1000+.

c ACE 949-2 interface for 2-wire RS 485 network

ACE 949ARS485network

1234

B

4321 C

L- L+ V+V-

L- L+ V+V-RS485network

CCA 612 toSepam

c ACE 959 interface for 4-wire RS 485 network

ACE 959

A

B

C

CCA 612to

Sepam

Tx-Tx+Rx-Rx+V+V-

Tx-Tx+Rx-Rx+V+V-

DV+V-

(1)

(1)

(2)

Rx+, Rx- : Sepam receiving (eq IN+, IN-)Tx+, Tx- : Sepam sending (eq OUT+, OUT-)

(1) distributed power supply with separate wiring or included inthe shielded cable (3 pairs)(2) terminal block for connection to the distributed powersupply module.

Communication (cont’d)

TC use S20 T20 M20 B21 B221 trip c c c c c2 close c c c c c3 switching to settings group A c c c4 switching to settings group B c c c5 Sepam reset c c c c c6 peak demand current zero reset c c c7 inhibit thermal protection c c8 inhibit disturbance recording triggering c c c c c9 confirm disturbance recording triggering c c c c c10 manual disturbance recording triggering c c c c c11 enable recloser c12 disable recloser c13 confirm thermal protection c c14 reserved15 reserved16 reserved

Sepam 1000+ 21

TS utilisation S20 T20 M20 B21 B2233 reserved34 recloser in service c35 recloser in progress c36 recloser permanent trip c37 recloser successful trip c38 send blocking input c c c39 remote setting inhibited c c c c c40 remote control inhibited c c c c c41 Sepam not reset after faultt c c c c c42 remote control /

position discrepancy c c c c c43 matching fault /

trip circuit supervision c c c c c44 disturbance recording

memorized c c c c c45 control fault c c c c c46 disturbance recording

inhibited c c c c c47 thermal protection inhibited c c48 RTD fault c c49 protection 49T

alarm set point sensor 1 c c50 protection 49T

tripping set point sensor 1 c c51 protection 49T














tripping set point sensor 8 c c

TS use S20 T20 M20 B21 B22

1 protection 50/51relay 1 group A c c c

2 protection 50/51relay 2 group A c c c

3 protection 50/51relay 1 group B c c c

4 protection 50/51relay 2 group B c c c

5 protection 50N/51Nrelay 1 group A c c c

6 protection 50N/51Nrelay 2 group A c c c

7 protection 50N/51Nrelay 1 group B c c c

8 protection 50N/51Nrelay 2 group B c c c

9 protection 49 RMSalarm set point c c

10 protection 49 RMStrip set point c c

11 protection 37 (undercurrent) c12 protection 46

(neg. seq./unbalance) c c c13 protection 48/51LR

(locked rotor) c14 rotor locking on start c15 excessive starting time c16 protection 66 (starts per hour) c17 protection 27D

(pos. seq. undervoltage) relay 1 c c18 protection 27D

(pos. seq. undervoltage) relay 2 c c19 protection 27

(ph.-to-ph. undervoltage) relay 1 c c20 protection 27

(ph.-to-ph. undervoltage) relay 2 c c21 protection 27R

(remanent U/V) relay 1 c c22 protection 59

(ph.-to-ph. overvoltage) relay 1 c c23 protection 59

(ph.-to-ph. overvoltage) relay 2 c c24 protection 59N

(ph-to-n. overvoltage) relay 1 c c25 protection 59N

(ph-to-n. overvoltage) relay 2 c c26 protection 81H (overfrequency) c c27 protection 81L (underfrequency)

relay 1 c c28 protection 81L (underfrequency)

relay 2 c c29 protection 27S (undervoltage) phase 1 c c30 protection 27S (undervoltage) phase 2 c c31 protection 27S (undervoltage) phase 3 c c32 protection 81R (ROCOF) c

Assignment of TS (remote indications)

Sepam 1000+22

Metering functions

Phase current

OperationThis function gives the RMS phase current values:c I1: phase 1 current,c I2: phase 2 current,c I3: phase 3 current.

It is based on RMS current measurement and takes into account up to harmonics 17th.

ReadoutThe measurements may be accessed via:

c the display (1) using the key,c the screen of a PC with SFT 2841 software,c the communication link,c analog converter with the MSA 141 option.

Characteristics

(1) In rated current defined when the general parameters are set.(2) at In, in reference conditions (IEC 60255-6).(3) 0.1 A resolution.

measurement range 0.1 to 1.5 In (1) (3)

unit A or kA

accuracy typically ±1% ±1 digit (2)

±2% from 0.3 to 1.5 In±5% if < 0.3 In

display format 3 significant digits

averaging period 1 second (typical)

(1) Sepam equipped with advanced UMI option.

Average currents and peak demand currents

OperationThis function gives:c the average RMS current of each phase obtained over on adjustable period,c the greatest average RMS current value obtained since the last reset.

These values are refreshed after each "integration period", a period that may beadjusted from 5 to 60 minutes.


c the display (1) using the key,c the communication link (TC6).

Clearingc by the clear key on the display (1) if the peak is displayed,c by the clear command in the SFT 2841 software,c by the communication link (TC6).


Characteristics

(1) In rated current defined when the general parameters are set.(2) 0.1 A resolution.(3) at In, in reference conditions (IEC 60255-6).

measurement range 0.1 to 1.5 In (1) (2)

unit A or kA

accuracy typically ±1% (3)

±2% from 0.3 to 1.5 In±5% if < 0.3 In


averaging period 5, 10, 15, 30, 60 mn

Sepam 1000+ 23

Residual current

OperationThis function gives the RMS value of the residualcurrent Io.It is based on measurement of the fundamentalcomponent.


c the display (1) using the key,c the screen of a PC with SFT 2841 software,c the communication link.(1) Sepam equipped with advanced UMI option.

(1) Ino rated current defined when the general parameters are set.(2) at In, in reference conditions (IEC 60255-6), excluding sensor accuracy.(3) 0.1 A resolution.

measurement rangeconnection to 3 phase CTs 0.1 to 1.5 Ino (1) (3)

connection to 1 phase CT with CS30 interposing ring CT 0.1 to 1.5 Ino (1) (3)

connection to core balance CT with ACE 990 0.1 to 1.5 Ino (1) (3)

connection to CSH core balance CT 2 A rating 0.2 to 3 A (3)

20 A rating 2 to 30 A (3)

unit A or kA

accuracy (2) typically ±1% at Ino±2% from 0.3 to 1.5 Ino±5% if < 0.3 Ino


refresh period 1 second (typical)

Characteristics

range -30 °C to 200 °C (1) -22 °F to 392 °F

accuracy ±1 °C from +20 °C to +140 °C±2 °C

resolution 1 °C or 1 °Frefresh period 5 seconds (typical)

Characteristics

(1) display possible in °F.

Accuracy derating according to wiringc Connection in 3-wire mode: the error ∆t is proportional to the length of the wireand inversely proportional to the wire cross-section:

v ±2.1°C/km for a cross-section of 0.93 mm2,v ±1°C/km for a cross-section of 1.92 mm2.

I (km)∆t (°C) = 2 x

S (mm2)

Temperatures

OperationThis function give the temperature value measuredby RTDs:c Pt100 platinum RTD (100 Ω at 0°C) according tothe IEC 751 and DIN 43760 standards,c nickel RTD 100 Ω or 120 Ω (at 0°C).

Each RTD channel gives one measurement:Tx = sensor x temperature.

This function detects RTD faults:c RTD disconnected (t °C < 205 °C),c RTD shorted (t °C < -35 °C).

In the event of a fault, display of the value is inhibited.The related monitoring function generates amaintenance alarm.

ReadoutThe measurement may be accessed via:



Sepam 1000+24

Metering functions (cont’d)

Characteristicsmeasurement range 0.05 to 1.2 Vnp (1) (3)

unit V or kV

accuracy (2) ±1% from 0.5 to 1.2 Vnp±2% from 0.05 to 0.5 Vnp



(1) Un rated voltage.(2) at Vnp, in reference conditions (IEC 60255-6).(3) 1 V or 1 digit resolution.

Characteristicsmeasurement range 0.05 to 1.2 Vnp (1)

unit V or kV

accuracy ±5% at Vnp

display format 3 significant digits(1) Un rated voltage.

Characteristicsmeasurement range 0.05 to 1.2 Unp (1) (3)

unit V or kV

accuracy (2) ±1% from 0.5 to 1.2 Unp±2% from 0.05 to 0.5 Unp


refresh period 1 second (typical)(1) Un rated voltage.(2) at Un, in reference conditions (IEC 60255-6).(3) 1 V resolution.

Phase-to-phase voltages

OperationThis function gives the RMS value of the 50 or 60 Hzcomponent of the phase-to-phase voltages (accordingto voltage sensors):c U21 voltage between phases 2 and 1,c U32 voltage between phases 3 and 2,c U13 voltage between phases 1 and 3.It is based on measurement of the fundamentalcomponent.




Positive sequence voltage

OperationThis function gives the calculated positive sequencevoltage value.


c the display (1) using the key,c the screen of a PC with SFT 2841 software,c the communication link.


Phase-to-neutral voltages

OperationThis function gives the RMS value of the 50 or 60 Hzcomponent of the phase-to-neutral voltages:c V1 phase-to-neutral voltage of phase 1,c V2 phase-to-neutral voltage of phase 2,c V3 phase-to-neutral voltage of phase 3,It is based on measurement of the fundamentalcomponent.




Sepam 1000+ 25

measurement range 0.015 Un to 3 Vnp (1)

unit V or kV

accuracy ±1% from 0.5 to 3 Vnp±2% from 0.05 to 0.5 Vnp±5% from 0.015 to 0.05 Vnp


resolution ±1 V, ±1 digit


(1) Vnp: rated primary phase-to-neutral voltage (Vnp = Unp/e).

Frequency

OperationThis function gives the frequency value.

The frequency is measured using one of the followingmethods:c from U21 if only one phase-to-phase voltage iswired to the Sepam 1000+,c from the positive sequence voltage if the Sepamincludes U21 and U32 measurements.

The frequency is not measured if:c the U21 voltage or Vd positive sequence voltage isless than 40% of Un,c the frequency is outside the measurement range.




Residual voltage

OperationThis function gives the residual voltage valueVo = (V1 + V2 + V3).

Vo is measured:c by taking the internal sum of the 3 phase voltages,c by a star / open delta VT.

It based on measurement of the fundamentalcomponent.


c the display (1) using the key,c the screen of a PC with SFT 2841 software,c the communication link,


Characteristics

rated frequency 50 Hz, 60 Hz

range (2) 50 Hz 45 Hz to 55 Hz

60 Hz 55 Hz to 65 Hz

accuracy (1) ±0.05 Hz



(1) at Un, in reference conditions (IEC 60255-6).(2) 0.01 Hz resolution.

Characteristics

Sepam 1000+26

Diagnosis functions

Unbalance ratio / negativesequence currentOperationThis function gives the unbalance ratio accordingto negative sequence current:c T = Ii/Ib,The negative sequence current is determinedaccording to the phase currents,c 3 phases

c 2 phases

the two formulas are equivalent when there are noearth faults.



Tripping currents

OperationThis function gives the RMS current valuesat the prospective tripping time:c TRIP1: phase 1 current,c TRIP2: phase 2 current,c TRIP3: phase 3 current,c TRIP0: residual current.It is based on measurement of the fundamentalcomponent.

tT0

30 ms

trip order

TRIP 1I

This measurement is defined as the maximum RMS valuemeasured during a 30 ms interval after the activation of thetripping contact on O1 output.

Characteristics

(1) In, Ino rated current defined when the general parameters are set.

measurement range phase current 0.1 to 40 In (1)

residual current 0.1 to 20 Ino (1)

accuracy ±5% ±1 digit


unit A or kA



Characteristics

measurement range (1) 10 to 500

unit % Ib

accuracy ±2%


refresh period 1 second (typical)(1) 1% resolution.

1Ii = x (I1 + a2 I2 + a I3)

3

with a = e

→ → → →

2 πj

3

1Ii = x (I1 - a2 I3)

with a = e

→ → →

2 πj

3

eeeee

Sepam 1000+ 27

measurement range 0 to 300 s

unit s or ms

resolution 10 ms or 1 digit



Starting time / overload characteristicsStarting current and time /overloadThe starting time / overload is the period between thetime at which one of the 3 phase currents exceeds1.2 Ib and the time at which the 3 currents drop backbelow 1.2 Ib. The maximum phase current obtainedduring this period is the starting current / overload.Both these values are saved in the case of anauxiliary power failure.


c the display(1) using the key,c the screen of a PC with SFT 2841 software,c the communication link.(1) Sepam equipped with advanced UMI.

(1) or 65.5 kA.

measurement range 1.2 Ib to 24 In (1)

unit A or kA

resolution 0.1 A or 1 digit



Starting current / overload characteristics

range 0 to 65535

unit hours

Running hours counter /operating timeThis counter provides the cumulative time duringwhich the protected device (motor or transformer)is running. The initial value of the counter may bemodified using the SFT 2841 software.

The counter is saved every 4 hours.


c the display (1) using the key,c the screen of a PC with SFT 2841 software,c the communication link. (1) Sepam equipped with advanced UMI.

Characteristics

Sepam 1000+28

Diagnosis functions (cont'd)

Disturbance recording

OperationThis function is used to record analog signals andlogical states.

Storage of the record is initiated according by atriggering event.

The stored record begins before the triggering eventand continues afterwards.

The record comprises the following information:c values sampled from the different signals,c date,c characteristics of the recorded channels.

The files are recorded in FIFO (First In First Out) typeshift storage: the oldest record is erased when a newrecord is triggered.

TransferFiles may be transferred locally or remotely:c locally: using a PC which is connected to the pocketterminal connector and includes the SFT 2841software package,c remotely: using a software package specificto the remote monitoring and control system.

DisplayThe signals are displayed from a record by meansof the SFT 2826 software package.

triggering event (1)

time

stored record

(1) according to parameter setting with SFT2841 (default setting 36 cycles).(2) according to sensor type and connection.

record duration x periods before the triggering event (1)

total 86 periods

record content set-up file:date, channel characteristics, measuringtransformerratio, sample file12 values per period/recorded signal

analog signals recorded (2) 4 current channels (I1, I2, I3, Io)4 voltage channels (V1, V2, V3, Vo)

logical signals 10 digital inputs

number of stored records 2

file format COMTRADE 97

Principle

Characteristics

Sepam 1000+ 29

Cumulative breaking currentand number of operations

OperationThis function indicates the cumulative breakingcurrent in square kilo-amperes (kA)2 for five currentranges. It is based on measurement of thefundamental component.

The current ranges displayed are:c 0 < I < 2 Inc 2 In < I < 5 Inc 5 In < I < 10 Inc 10 In < I < 40 Inc I > 40 In

This function also provides the total number ofoperations as well as the total cumulative breakingcurrent in square kilo-amps.

Please refer to the breaking device documentationregarding the use of this information.The function is activated by the trip order (relay O1).

Each value is saved in the event of an auxiliary powerfailure.


c the display (1) using the key,c the screen of a PC with SFT 2841 software,c the communication link.

The initial values may be entered using the SFT 2841 software to take into accountthe real state of a used breaking device.

number of operations

range 0 to 65535

breaking current (kA) 2

range 0 to 65535 (kA)2

unit primary (kA) 2

accuracy (1) ±10% ±1 digit(1) at In, in reference conditions (IEC 60255-6).

Characteristics

Operating time

OperationThis function gives the operating time of a breakingdevice (1) determined according to the opening order(relay O1) and the change of status of the deviceopen position contact wired to input I11 (3).The value is saved in the event of an auxiliary powerfailure.


c the display (2) using the key,c the screen of a PC with SFT 2841 software,c the communication link.(1) Please refer to the breaking device documentationregarding the use of this information.(2) Sepam equipped with advanced UMI.(3) Operational MES module.

Charging time

OperationThis function gives the control charging time of thebreaking device (1) determined according to thechange of status of the device closed position contactand the end-of-control charging contact wired toinputs I12 and I24 (3) respectively.The value is saved in the event of an auxiliary powerfailure.


c the display (2) using the key,c the screen of a PC with SFT 2841 software,c the communication link,(1) Please refer to the breaking device documentationregarding the use of this information.(2) Sepam equipped with advanced UMI.(3) Operational MES 114 module.

measurement range 20 to 100

unit ms

accuracy typically ±1 ms


Characteristics


unit s

accuracy ±0.5 sec


Characteristics

Sepam 1000+30

Protection functions

OperationPhase overcurrent protection is three-pole.

It picks up when one, two or three of the phasecurrents reaches the operation set point.It is time-delayed. The time delay may be definite time(DT) or IDMT according to the curves opposite.

Definite time protectionIs is the set point express in amperes, and T is theprotection operating time delay.

The Is setting is the vertical asymptote of the curve, and T is the operation timedelay for 10Is.

The tripping time for I/Is values less than 1.2 depends on the type of curveselected.

curve designation type

standard inverse time (SIT) 1.2

very inverse time (VIT or LTI) 1.2

extremely inverse time (EIT) 1.2

ultra inverse time (UIT) 1.2

RI curve 1

IEC SIT / A 1

IEC VIT or LTI / B 1

IEC EIT / C 1

IEEE moderately inverse (IEC / D) 1

IEEE very inverse (IEC / E) 1

IEEE extremely inverse (IEC / F) 1

IAC inverse 1

IAC very inverse 1

IAC extremely inverse 1

The equations of these curves are given in the "IDMT protections" chapter, p. 56.

The function takes into account current variations during the time delay.

For currents with a very large amplitude, the protection has a definite timecharacteristic:c if I > 20 Is, tripping time is the time that corresponds to 20 Is.c if I > 40 In, tripping time is the time that corresponds to 40 In.(In: current transformer rated current defined when the general parameters areset).

IDMT protectionIDMT protection operates in accordance with theIEC (60255-3), BS 142 standards, IEEE (C-37112).

I

t

Is

T

1.2 I/Is

t

1

T

10 20

type 1,2

type 1

Principe de la protection à temps indépendant.

IDMT protection principle.

Time delayed resetThe function includes an adjustable holding time T1:v definite time (timer hold) for all the tripping curves.

I1I2

I3

"pick-up" signal andto logic discrimination

time-delayedoutput

t 0I > Is

Block diagram

I > Is time-delayed output

I > Is instantaneous

value of internaltime delaycounter

T

T1 T1 T1

tripping

ANSI code 50-51

The phase overcurrent function comprises4 independant elements divided into two groupsof 2 elements called Group A and Group Brespectively.The use of the two groups may be chosen byparameter setting:c operation with Group A or Group B exclusively, withswitching from one group to the other dependent onthe state of logic input I13 exclusively,or by remote control (TC3, TC4),I13 = 0 group AI13 = 1 group Bc operation with Group A and Group B active for 4-setpoint operation,c enabling/disabling of each group of 2 elements(A, B).

Phase overcurrent

Sepam 1000+ 31

tripping curve

setting definite time,IDMT: choice according to list opposite

Is set point

setting definite time 0.1 In ≤ Is ≤ 24 In expressed in amperes

IDMT 0.1 In ≤ Is ≤ 2,4 In expressed in amperes

resolution 1 A or 1 digit

accuracy (1) ±5%

pick-up/drop-out ratio 93.5 % ±5 % (with min. reset time diff. 0.015 In)

T time delay (operating time at 10 Is)

setting definite time inst, 50 ms ≤ T ≤ 300 s

IDMT 100 ms ≤ T ≤ 12.5 s or TMS (2)


accuracy (1) definite time ±2 % or from -10 ms à +25 ms

IDMT class 5 or from -10 ms to +25 ms

holding time T1

definite time (timer hold) 0; 0.05 to 300 s

IDMT (reset time) (3) 0.5 to 300 s

characteristic times

operating time pick up < 35 ms at 2 Is (25 ms typical)

confirmed instantaneous < 50 ms at 2 Is(35 ms typical)

overshoot time < 35 ms

reset time < 50 ms (for T1 = 0)

Characteristics

(1) in reference conditions (IEC 60255-6).(2) setting ranges in TMS mode (Time Multiplier Setting)

Standard inverse (SIT) and IEC SIT/A: 0.04 to 4.20Very inverse (VIT) and IEC VIT/B: 0.07 to 8.33Long time inverse (LTI) and IEC LTI/B: 0.01 to 0.93Extremely inverse (EIT) and IEC EIT/C: 0.13 to 15.47IEEE moderately inverse: 0.42 to 51.86IEEE very inverse: 0.73 to 90.57IEEE extremely inverse: 1.24 to 154.32IAC inverse: 0.34 to 42.08IAC very inverse: 0.61 to 75.75IAC extremely inverse: 1.08 to 134.4

(3) only for standardized tripping curves of the IEC, IEEE and IAC type.

v IDMT (reset time) for the IEC, IEEE and IAC curves.


I > Is signal pick-up

value of internaltime-delaycounter

T

T1

tripping

Sepam 1000+32

Protection functions (cont’d)

The Iso setting is the vertical asymptote of the curve, and T is the operation timedelay for 10Iso.

The tripping time for I/Iso values less than 1.2 depends on the type of curveselected.

curve designation type

standard inverse time (SIT) 1.2

very inverse time (VIT or LTI) 1.2

extremely inverse time (EIT) 1.2

ultra inverse time (UIT) 1.2

RI curve 1

IEC SIT / A 1

IEC VIT or LTI / B 1

IEC EIT / C 1

IEEE moderately inverse (IEC / D) 1

IEEE very inverse (IEC / E) 1

IEEE extremely inverse (IEC / F) 1

IAC inverse 1

IAC very inverse 1

IAC extremely inverse 1

The equations of these curves are given in the "IDMT protections" chapter, p. 56.

The function also takes into account current variations during the time delay.

For currents with a very large amplitude, the protection has a definite timecharacteristic:c if I > 20 Iso, tripping time is the time that corresponds to 20 Iso,c if I > 15 Ino, tripping time is the time that corresponds to 15 Ino.(Ino: current transformer rated current defined when the general parametersare set).

OperationEarth fault protection is single-pole.

It picks up when the earth fault current reaches theoperation set point.It is time-delayed. The time delay may be definite time(DT) or IDMT according to the curves opposite.The protection integrates a 2nd harmonic restraintwhich provides greater stability when the transformersenergize (measurement of residual current by thesum of the 3 phase CTs).The restraint inhibits tripping, whateverthe fundamental current.The restraint may be inhibited by parameter setting.

Definite time protectionIs is the operating set point expressed in amperes,and T is the protection operation time delay.

Io

t

Iso

T

IDMT protection principle.

IDMT protectionIDMT protection operates in accordance with theIEC 60255-3,BS 142 standards, and IEEE (C-37112).

Definite time protection principle.

Time delayed resetThe function includes an adjustable holding time T1:v definite time (timer hold) for all the tripping curves.

T

T1 T1 T1

I > Iso time-delayed output

I > Iso instantaneous

value of internaltime delaycounter

tripping

Block diagramI1I2

I3"pick-up" signal andto logic discrimination

time-delayedoutput

t 0Io > Iso

H2

CSHcore balance CT

CT+CSH30

core balance CT+ ACE 990

Σ

1.2 I/Is

t

1

T

10 20

type 1,2

type 1

ANSI code 50N-51N or 50G-51G

The earth fault function comprises 4 independantelements divided into two groups of 2 settings calledGroup A and Group B respectively.The use of the two elements may be chosenby parameter setting:c operation with Group A or Group B exclusively, withswitching from one group to the other dependent onthe state of logic input I13 exclusively,or by remote control (TC3, TC4),13 = 0 group A13 = 1 group Bc operation with Group A and Group B active for 4-setpoint operation,c enabling/disabling of each group of 2 elements(A, B).

Earth fault

Sepam 1000+ 33

v IDMT (reset time) for the IEC, IEEE and IAC curves.


I > Is signal pick-up

value of internaltime-delaycounter

T

T1

tripping

(1) Ino = In if the sum of the three phase currents is used forthe measurement.Ino = sensor rating if the measurement is taken by a CSHcore balance CT.Ino = In of the CT if the measurement is taken by a 1 A or 5 Acurrent transformer.(2) setting ranges in TMS mode (Time Multiplier Setting)

Standard inverse (SIT) and IEC SIT/A: 0.04 to 4.20Very inverse (VIT) and IEC VIT/B: 0.07 to 8.33Long time inverse (LTI) and IEC LTI/B: 0.01 to 0.93Extremely inverse (EIT) and IEC EIT/C: 0.13 to 15.47IEEE moderately inverse: 0.42 to 51.86IEEE very inverse: 0.73 to 90.57IEEE extremely inverse: 1.24 to 154.32IAC inverse: 0.34 to 42.08IAC very inverse: 0.61 to 75.75IAC extremely inverse: 1.08 to 134.4

(3) only for standardized tripping curves of the IEC, IEEE andIAC type.

Characteristics

tripping curve

setting definite time,IDMT: choice according to list opposite

Iso set point

definite time setting 0.1 Ino i Iso i 15 Ino expressed in amperes

sum of CTs (1) 0.1 Ino i Iso i 15 Ino

with CSH sensor2 A rating 0.2 A to 30 A20 A rating 2 A to 300 A

CT + CSH30 0.1 Ino i Iso i 15 Ino (min. 0.1 A)

core bal. CT 0.1 Ino < Iso < 15 Inowith ACE 990

IDMT setting 0.1 Ino i Iso i Ino (1) expressed in amperes

sum of CTs (1) 0,1 In i Iso i Ino

with CSH sensor2 A rating 0.2 A to 2 A20 A rating 2 A to 20 A

CT + CSH30 0.1 Ino i Iso i 1 Ino (min. 0.1 A)

core bal. CTwith ACE 990 0.1 Ino i Iso i Ino

resolution 0.1 A or 1 digit

accuracy (2) ±5%

pick-up/drop-out ratio 93.5% ±5% for Iso > 0.1 Ino

2nd harmonic restraint

fixed set point 17%

T time delay (operating time at 10 Iso)

setting definite time inst., 50 ms i T i 300 s

IDMT (3) 100 ms i T i 12.5 s


accuracy (2) definite time ±2% or from -10 ms to +25 ms

IDMT class 5 or from -10 ms to +25 ms

holding time T1

definite time (timer hold) 0; 0.05 to 300 s

IDMT (reset time) 0.5 to 300 s


operating time pick up < 35 ms at 2 Iso (25 ms typical)

confirmed instantaneous < 50 ms at 2 Iso(35 ms typical)


reset time < 40 ms (for T1 = 0)

Sepam 1000+34


ANSI code 46

Negative sequence /unbalance

OperationNegative sequence / unbalance protection:c picks up when the negative sequence componentof the phase currents is greater than the set point,c it is time-delayed. The time delay may be definiteor IDMT time (see curve).

The negative sequence current Ii is calculatedfor the 3 phase currents:

If Sepam is connected to 2 phase current sensorsonly, the negative sequence current is:

the two formulas are equivalent when there is noresidual current (earth fault).

Definite time delay

For Ii > Is, the time delay is definite (independent of Ii)and equal to T.

IDMT time delayFor Ii > Is, the time delay depends on the value of Ii/Ib(Ib: basis current of the protected equipment definedwhen the general parameters are set)T corresponds to the time delay for Ii/Ib = 5.

The tripping curve is defined according to the following equations:c for Is/Ib i Ii/Ib i 0.5

c for 0.5 i Ii/Ib i 5

c for Ii/Ib > 5

t = T

The function also takes into account negative sequence current variations duringthe time delay.

The negative sequence current ratio measurement, expressed as a percentageof the basis current, is available even if the protection is inhibited.

Block diagram

Ii

t

Is

T

time-delayedoutput

I1

I2

I3

Ii > Is0t

“pick-up”signal

Definite time protection.

3.19t = . T

(Ii/Ib)1.5

4.64t = . T

(Ii/Ib)0.96

1Ii = x (I1 + a2 I2 + a I3)

3

with a = e

→ → → →

2 πj

3

1Ii = x (I1 - a2 I3)eeeee

with a = e

→ → →

2 πj

3

Ii

t

Is 5Ib

T

IDMT protection.

Characteristics

curve

setting definite, IDMT

Is set point

setting definite time 10% Ib i Is i 500% Ib

IDMT 10% Ib i Is i 50% Ib

resolution 1%

accuracy (1) ±5%

T time delay (operation time at 5 Ib)

setting definite time 100 ms i T i 300 s

IDMT 100 ms i T i 1 s


accuracy (1) definite time ±2% or ±25 ms

IDMT ±5% or ±35 ms

pick-up/drop-out ratio 93.5% ±5%


operating time < 55 ms pick up


reset time < 55 ms(1) in reference conditions (IEC 60255-6).

Sepam 1000+ 35

Determination of tripping time for differentnegative sequence current values for a givencurveUsing the chart, the user finds the value of K thatcorresponds to the desired negative sequencecurrent. The tripping time is equal to KT.

ExampleGiven a tripping curve with the T setting = 0.5 s.What is the tripping time at 0.6 Ib?Using the chart, find the value of K that correspondsto 60% of Ib.The chart gives K = 7.55. The tripping time is equalto: 0.5 x 7.55 = 3.755 s.

0.05 0.1 0.2 0.5 1 3

I/Ib

0.3 0.7 2 5 7 10 20

0.001

0.002

0.005

0.01

0.02

0.05

0.1

0.2

0.5

1

2

5

10

20

50

100

200

500

1000

2000

5000

10000

t(s)

max. curve (T=1s)

min. curve (T=0,1s)

Ii (% Ib) 10 15 20 25 30 33.33 35 40 45 50 55 57.7 60 65 70 75

K 99.95 54.50 35.44 25.38 19.32 16.51 15.34 12.56 10.53 9.00 8.21 7.84 7.55 7.00 6.52 6.11

Ii (% Ib) cont'd 80 85 90 95 100 110 120 130 140 150 160 170 180 190 200 210

K cont'd 5.74 5.42 5.13 4.87 4.64 4.24 3.90 3.61 3.37 3.15 2.96 2.80 2.65 2.52 2.40 2.29

Ii (% Ib) cont'd 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370

K cont'd 2.14 2.10 2.01 1.94 1.86 1.80 1.74 1.68 1.627 1.577 1.53 1.485 1.444 1.404 1.367 1.332

Ii (% Ib) cont'd 380 390 400 410 420 430 440 450 460 470 480 490 ≥ 500

K cont'd 1.298 1.267 1.236 1.18 1.167 1.154 1.13 1.105 1.082 1.06 1.04 1.02 1

IDMT tripping curve

Sepam 1000+36

Thermal overload


This function is used to protect equipment (motors,transformers, generators, lines, capacitors) againstoverloads, based on measurement of the currentconsumed.

Operation

Operation curveThe protection gives a trip order when the heat rise E,calculated according to the measurement of anequivalent current Ieq, is greater than the set pointEs.

The greatest permissible continuous current is

I = Ib Es

The protection tripping time is set by the timeconstant T.

The calculated heat rise depends on the currentconsumed and the previous heat rise state.c The cold curve defines the protection tripping timebased on zero heat rise.c The hot curve defines the protection tripping timebased on 100% nominal heat rise.

Alarm set point, tripping set pointTwo set points may be set for heat rise:c Es1: alarm.c Es2: tripping.

“Hot state” set pointWhen the function is used to protect a motor, thisfixed set point is designed for detection of the hotstate used by the number of starts function.

Heat rise and cooling time constantsFor self-ventilated rotating machines, cooling is more

effective when the machine is running than when it is stopped. Running andstopping of the equipment are calculated from the value of the current:c running if I > 0.1 Ib,c stopped if I < 0.1 Ib.

Two time constants may be set:c T1: heat rise time constant: concerns equipment that is running,c T2: cooling time constant: concerns equipment that is stopped.

Accounting for harmonicsThe current measured by the thermal protection is an RMS 3-phase currentwhich takes into account harmonics up to number 17.

Accounting for ambient temperatureMost machines are designed to operate at a maximum ambient temperatureof 40°. The thermal overload function takes into account the ambient temperature(Sepam 1000+ equipped with the temperature sensor option (1)) to increasethe calculated heat rise value when the temperature measured exceeds 40°.

Increase factor: fa = T max - 40°T max - T ambient

T max is the machine’s maximum temperature.T ambient is the measured temperature.

Adaptation of the protection to motor thermal withstandMotor thermal protection is often set based on the hot and cold curves suppliedby the machine manufacturer. To fully comply with these experimental curves,additional parameters must be set:c initial heat rise, Eso, is used to reduce the cold tripping time.

modified cold curve: tT

= Log

leqIb

2

leqIb

2

- Es

- Eso

c a second group of parameters (time constants and set points) is used to takeinto account thermal withstand with locked rotors. This second set of parametersis taken into account when the current is greater than an adjustable set point Is.

Accounting for negative sequence currentIn the case of motors with coiled rotors, the presence of a negative sequencecomponent increases the heat rise in the motor. The negative sequencecomponent of the current is taken into account in the protection by the equation

leq = Iph2 + K. Ii

2in which Iph is the greatest phase current

Ii is the negative sequence component of the current

K is an adjustable factor

K may have the following values: 0 - 2.25 - 4.5 - 9

For an asynchronous motor, K is determined as follows:

k = 2.CdCn

1

g. IdIb

2. - 1

ANSI code 49

cold curve

hot curve

Heat rise time constant. Cooling time constant.

Cn, Cd: rated torque and starting torque

Ib, Id: basis current and starting current

g: rated slip

in

(1) MET148 module, RTC 8 predefined for ambient temperature measurement.

50 10

10-1

10-2

10-3

100

101

t

E

T1

0.63

1

0t

E

T2

0.36

1

0

tT

= Log

leqIb

2

leqIb

2

- Es

tT

= Log

leqIb

2

leqIb

2

- Es

- 1

Sepam 1000+ 37

Start inhibitThe thermal overload protection can inhibit theclosing of the motor’s control device until the heat risedrops back down below a value that allows restarting.

This value takes into account the heat rise producedby the motor when starting.

The inhibition function is grouped together with thestarts per hour protection and the indication STARTINHIBIT informs the user.

Saving of heat riseWhen the protection trips, the current heat rise,increased by 10 %(1), is saved. The saved value isreset to zero when the heat rise decreases sufficientlyfor the time before starting to be zero. The savedvalue is used when the power returns after a Sepampower failure, so as to start up again with the heatrise that triggered tripping.(1) increasing by 10 % makes it possible to take into accountthe average heat rise of motors when starting.

Inhibition of trippingTripping of the thermal overload protection may beinhibited by logic input I26 (according to parametersetting) when required by the process.

Accounting for two operating ratesA power transformer often has two operating modes(e.g. ONAN and ONAF).

The two groups of parameters in the thermal overloadprotection take into account these two operatingmodes.

Switching from one mode to the other is controlledby a logic input I26 (according to parameter setting).It is done without losing the heat rise value.

User informationThe following information is available for the user:

c time before restart enabled (in case of inhibitionof starting),c time before tripping (with constant current),c heat rise.

Block diagram

I ph

I inverse

calculationof equivalentcurrent

K

heat rise :

Ek = Ek-1 + leqIb

2. ∆t

T- Ek-1

. ∆tTleq

leq > Is

selectionof parametergroup

TEso

correctionby ambienttemperature

T max

ambienttemperature

E > Es1

inhibit startinhibitclosingindication

E > Es2&

input I26 trippingindication

alarmindication

Es1Es2

input I26

fa

Is

Characteristics

set points group A group B

setting Es1 alarm set point 50% to 300% 50% to 300%Es2 tripping set point 50% to 300% 50% to 300%Eso initial heat rise 0 to 100% 0 to 100%

resolution 1% 1%

time constants

setting T1 running (heat rise) 1 mn to 120 mn 1 mn to 120 mnT2 stopped (cooling) 5 mn to 600 mn 5 mn to 600 mn

resolution 1 mn 1 mn

accounting for negative sequence component

setting K 0 – 2.25 – 4.5 – 9

maximum equipment temperature (insulation class)

setting Tmax 60° to 200°resolution 1°tripping time

accuracy (1) 2%

measurements range resolution

heat rise 0% to 800% 1%time before tripping 0 to 999 mn 1 mntime before start enabled 0 to 999 mn 1 mn

change of setting parameters

by current threshold for motor setting 0.25 to 8 Ibby digital input for transformer I26(1) In reference conditions (IEC 60255-8).

Sepam 1000+38

Example of thermal overloadsettings for a motor

Example 1The following data are available:c time constants for on operation T1 and offoperation T2:v T1 = 25 min,v T2 = 70 min.c maximum curve in steady state: Imax/Ib = 1.05.

Setting of tripping set point Es2Es2 = (Imax/Ib)2 = 110%

Please note: if the motor absorbs a current of 1.05 Ibin steady state, the heat rise calculated by the thermaloverload protection will reach 110%.

Setting of alarm set point Es1Es1 = 90% (I/Ib = 0.95).

Knegative: 4.5 (usual value)

The other thermal overload parameters do not needto be set. They are not taken into account by default.

Example 2The following data are available:c motor thermal resistance in the form of hot and coldcurves (see solid line curves in Figure 1),c cooling time constant T2,c maximum steady state current: Imax/Ib = 1.05.


Setting of alarm set point Es1:Es1 = 90% (I/Ib = 0.95).

The manufacturer’s hot/cold curves (1) may be used todetermine the heating time constant T1.

For an overload of 2*Ib, the value t/T1 = 0.0339 (2) is obtained.

In order for Sepam to trip at the point 1 (t = 70 s), T1 is equal to 2065 sec ≈ 34 min.

With a setting of T1 = 34 min, the tripping time is obtained based on a cold state(point 2). In this case, it is equal to t/T1 = 0.3216 ⇒ t ⇒ 665 sec, i.e. ≈ 11 min,which is compatible with the thermal resistance of the motor when cold.

The negative sequence factor is calculated using the equation defined on page 34.

The parameters of the second thermal overload relay do not need to be set.They are not taken into account by default.

Example 3The following data are available:c motor thermal resistance in the form of hot and cold curves(see solid line curves in Figure 1),c cooling time constant T2,c maximum steady state current: Imax/Ib = 1.1.


Setting of alarm set point Es1Es1 = 90% (I/Ib = 0.95).

The time constant T1 is calculated so that the thermal overload protection tripsafter 100 s (point 1).

With t/T1 = 0.069 (I/Ib = 2 and Es2 = 120%):⇒ T1 = 100s / 0.069 = 1449 sec ≈ 24 min.

The tripping time starting from the cold state is equal to:

t/T1 = 0.3567 ⇒ t = 24 min*0.3567 = 513 s (point 2’).

This tripping time is too long since the limit for this overload current is 400 s(point 2).

If the time constant T1 is lowered, the thermal overload protection will trip earlier,below point 2.

There risk that motor starting when hot will not be possible also exists in this case(see Figure 2 in which a lower Sepam hot curve would intersect the starting curvewith U = 0.9 Un).

The Es0 parameter is a setting that is used to solve these differences by loweringthe Sepam cold curve without moving the hot curve.

In this example, the thermal overload protection should trip after 400 s startingfrom the cold state.

The following equation is used to obtain the Es0 value:


(1) When the machine manufacturer provides both a timeconstant T1 and the machine hot/cold curves, the use ofthe curves is recommended since they are more accurate.

(2) The charts containing the numerical values of the Sepam hot curve may be used, or elsethe equation of the curve which is given on page 34.

Figure 1: motor thermal resistance and thermaloverload tripping curves

665

70

1.05 2

motor cold curve

Sepam cold curve

motor hot curve

Sepam hot curve

time

befo

re tr

ippi

ng/s

I/Ib

2

1

ES0

=Iprocessed

Ib

– e

2

.Iprocessed

Ib

2

– ES2

tnecessary

T1

with:

tnecessary

: tripping time necessary starting from a cold state.

Iprocessed: equipment current.

Sepam 1000+ 39

In numerical values, the following is obtained: Use of the additional setting groupWhen a motor rotor is locked or is turning very slowly, its thermal behavior isdifferent from that with the rated load. In such conditions, the motor is damaged byoverheating of the rotor or stator. For high power motors, rotor overheating is mostoften a limiting factor.

The thermal overload parameters chosen for operation with a low overload are nolonger valid.

In order to protect the motor in this case, “excessive starting time” protection maybe used.

Nevertheless, motor manufacturers provide the thermal resistance curves whenthe rotor is locked, for different voltages at the time of starting.

Figure 4: Locked rotor thermal resistance

In order to take these curves into account, the second thermal overload relay maybe used.

The time constant in this case is, in theory, the shortest one: however, it should notbe determined in the same way as that of the first relay.

The thermal overload protection switches between the first and second relay ifthe equivalent current Ieq exceeds the Is value (set point current).

1.1 2

locked rotor

times

/ s

I/Ib

1

Is

motor running

32

4 5 6

Figure 2: hot/cold curves not compatible withthe motor’s thermal resistance

400

100

1.05 2

motor cold curve

Sepam cold curve

motor hot curve

Sepam hot curve

time

befo

re tr

ippi

ng/s

I/Ib

2

2’513

starting at Un

starting at 0.9*Un

1

Figure 3: hot/cold curves compatible with themotor’s thermal resistance via the setting of aninitial heat rise Es0

400

100

1.1 2

motor cold curve

adjusted Sepamcold curve

motor hot curve

Sepam hot curve

time

befo

re tr

ippi

ng/s

I/Ib

2

starting at Un

starting at 0.9*Un

1

ES0

= 4 – e

400 sec

24*60 sec . 4 – 1.2 = 0.3035 31%

By setting Es0 = 31%, point 2’ is moved downward toobtain a shorter tripping time that is compatible withthe motor’s thermal resistance when cold(see Figure 3).

Please note: A setting Es0 = 100% therefore meansthat the hot and cold curves are the same.

1 : thermal resistance, motor running

2 : thermal resistance, motor stopped

3 : Sepam tripping curve

4 : starting at 65% Un



Sepam 1000+40


Cold curvesfor Eso = 0

I/Ib 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80Es (%)

50 0.6931 0.6042 0.5331 0.4749 0.4265 0.3857 0.3508 0.3207 0.2945 0.2716 0.2513 0.2333 0.2173 0.2029 0.1900 0.1782 0.1676

55 0.7985 0.6909 0.6061 0.5376 0.4812 0.4339 0.3937 0.3592 0.3294 0.3033 0.2803 0.2600 0.2419 0.2257 0.2111 0.1980 0.1860

60 0.9163 0.7857 0.6849 0.6046 0.5390 0.4845 0.4386 0.3993 0.3655 0.3360 0.3102 0.2873 0.2671 0.2490 0.2327 0.2181 0.2048

65 1.0498 0.8905 0.7704 0.6763 0.6004 0.5379 0.4855 0.4411 0.4029 0.3698 0.3409 0.3155 0.2929 0.2728 0.2548 0.2386 0.2239

70 1.2040 1.0076 0.8640 0.7535 0.6657 0.5942 0.5348 0.4847 0.4418 0.4049 0.3727 0.3444 0.3194 0.2972 0.2774 0.2595 0.2434

75 1.3863 1.1403 0.9671 0.8373 0.7357 0.6539 0.5866 0.5302 0.4823 0.4412 0.4055 0.3742 0.3467 0.3222 0.3005 0.2809 0.2633

80 1.6094 1.2933 1.0822 0.9287 0.8109 0.7174 0.6413 0.5780 0.5245 0.4788 0.4394 0.4049 0.3747 0.3479 0.3241 0.3028 0.2836

85 1.8971 1.4739 1.2123 1.0292 0.8923 0.7853 0.6991 0.6281 0.5686 0.5180 0.4745 0.4366 0.4035 0.3743 0.3483 0.3251 0.3043

90 2.3026 1.6946 1.3618 1.1411 0.9808 0.8580 0.7605 0.6809 0.6147 0.5587 0.5108 0.4694 0.4332 0.4013 0.3731 0.3480 0.3254

95 1.9782 1.5377 1.2670 1.0780 0.9365 0.8258 0.7366 0.6630 0.6012 0.5486 0.5032 0.4638 0.4292 0.3986 0.3714 0.3470

100 2.3755 1.7513 1.4112 1.1856 1.0217 0.8958 0.7956 0.7138 0.6455 0.5878 0.5383 0.4953 0.4578 0.4247 0.3953 0.3691

105 3.0445 2.0232 1.5796 1.3063 1.1147 0.9710 0.8583 0.7673 0.6920 0.6286 0.5746 0.5279 0.4872 0.4515 0.4199 0.3917

110 2.3979 1.7824 1.4435 1.2174 1.0524 0.9252 0.8238 0.7406 0.6712 0.6122 0.5616 0.5176 0.4790 0.4450 0.4148

115 3.0040 2.0369 1.6025 1.3318 1.1409 0.9970 0.8837 0.7918 0.7156 0.6514 0.5964 0.5489 0.5074 0.4708 0.4384

120 2.3792 1.7918 1.4610 1.2381 1.0742 0.9474 0.8457 0.7621 0.6921 0.6325 0.5812 0.5365 0.4973 0.4626

125 2.9037 2.0254 1.6094 1.3457 1.1580 1.0154 0.9027 0.8109 0.7346 0.6700 0.6146 0.5666 0.5245 0.4874

130 2.3308 1.7838 1.4663 1.2493 1.0885 0.9632 0.8622 0.7789 0.7089 0.6491 0.5975 0.5525 0.5129

135 2.7726 1.9951 1.6035 1.3499 1.1672 1.0275 0.9163 0.8253 0.7494 0.6849 0.6295 0.5813 0.5390

140 2.2634 1.7626 1.4618 1.2528 1.0962 0.9734 0.8740 0.7916 0.7220 0.6625 0.6109 0.5658

145 2.6311 1.9518 1.5877 1.3463 1.1701 1.0341 0.9252 0.8356 0.7606 0.6966 0.6414 0.5934

150 3.2189 2.1855 1.7319 1.4495 1.2498 1.0986 0.9791 0.8817 0.8007 0.7320 0.6729 0.6217

155 2.4908 1.9003 1.5645 1.3364 1.1676 1.0361 0.9301 0.8424 0.7686 0.7055 0.6508

160 2.9327 2.1030 1.6946 1.4313 1.2417 1.0965 0.9808 0.8860 0.8066 0.7391 0.6809

165 2.3576 1.8441 1.5361 1.3218 1.1609 1.0343 0.9316 0.8461 0.7739 0.7118

170 2.6999 2.0200 1.6532 1.4088 1.2296 1.0908 0.9793 0.8873 0.8099 0.7438

175 3.2244 2.2336 1.7858 1.5041 1.3035 1.1507 1.0294 0.9302 0.8473 0.7768

180 2.5055 1.9388 1.6094 1.3832 1.2144 1.0822 0.9751 0.8861 0.8109

185 2.8802 2.1195 1.7272 1.4698 1.2825 1.1379 1.0220 0.9265 0.8463

190 3.4864 2.3401 1.8608 1.5647 1.3555 1.1970 1.0713 0.9687 0.8829

195 2.6237 2.0149 1.6695 1.4343 1.2597 1.1231 1.0126 0.9209

200 3.0210 2.1972 1.7866 1.5198 1.3266 1.1778 1.0586 0.9605

Sepam 1000+ 41

I/Ib 1.85 1.90 1.95 2.00 2.20 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80 4.00 4.20 4.40 4.60Es (%)

50 0.1579 0.1491 0.1410 0.1335 0.1090 0.0908 0.0768 0.0659 0.0572 0.0501 0.0442 0.0393 0.0352 0.0317 0.0288 0.0262 0.0239

55 0.1752 0.1653 0.1562 0.1479 0.1206 0.1004 0.0849 0.0727 0.0631 0.0552 0.0487 0.0434 0.0388 0.0350 0.0317 0.0288 0.0263

60 0.1927 0.1818 0.1717 0.1625 0.1324 0.1100 0.0929 0.0796 0.069 0.0604 0.0533 0.0474 0.0424 0.0382 0.0346 0.0315 0.0288

65 0.2106 0.1985 0.1875 0.1773 0.1442 0.1197 0.1011 0.0865 0.075 0.0656 0.0579 0.0515 0.0461 0.0415 0.0375 0.0342 0.0312

70 0.2288 0.2156 0.2035 0.1924 0.1562 0.1296 0.1093 0.0935 0.081 0.0708 0.0625 0.0555 0.0497 0.0447 0.0405 0.0368 0.0336

75 0.2474 0.2329 0.2197 0.2076 0.1684 0.1395 0.1176 0.1006 0.087 0.0761 0.0671 0.0596 0.0533 0.0480 0.0434 0.0395 0.0361

80 0.2662 0.2505 0.2362 0.2231 0.1807 0.1495 0.1260 0.1076 0.0931 0.0813 0.0717 0.0637 0.0570 0.0513 0.0464 0.0422 0.0385

85 0.2855 0.2685 0.2530 0.2389 0.1931 0.1597 0.1344 0.1148 0.0992 0.0867 0.0764 0.0678 0.0607 0.0546 0.0494 0.0449 0.0410

90 0.3051 0.2868 0.2701 0.2549 0.2057 0.1699 0.1429 0.1219 0.1054 0.092 0.0811 0.0720 0.0644 0.0579 0.0524 0.0476 0.0435

95 0.3251 0.3054 0.2875 0.2712 0.2185 0.1802 0.1514 0.1292 0.1116 0.0974 0.0858 0.0761 0.0681 0.0612 0.0554 0.0503 0.0459

100 0.3456 0.3244 0.3051 0.2877 0.2314 0.1907 0.1601 0.1365 0.1178 0.1028 0.0905 0.0803 0.0718 0.0645 0.0584 0.0530 0.0484

105 0.3664 0.3437 0.3231 0.3045 0.2445 0.2012 0.1688 0.1438 0.1241 0.1082 0.0952 0.0845 0.0755 0.0679 0.0614 0.0558 0.0509

110 0.3877 0.3634 0.3415 0.3216 0.2578 0.2119 0.1776 0.1512 0.1304 0.1136 0.1000 0.0887 0.0792 0.0712 0.0644 0.0585 0.0534

115 0.4095 0.3835 0.3602 0.3390 0.2713 0.2227 0.1865 0.1586 0.1367 0.1191 0.1048 0.0929 0.0830 0.0746 0.0674 0.0612 0.0559

120 0.4317 0.4041 0.3792 0.3567 0.2849 0.2336 0.1954 0.1661 0.1431 0.1246 0.1096 0.0972 0.0868 0.0780 0.0705 0.0640 0.0584

125 0.4545 0.4250 0.3986 0.3747 0.2988 0.2446 0.2045 0.1737 0.1495 0.1302 0.1144 0.1014 0.0905 0.0813 0.0735 0.0667 0.0609

130 0.4778 0.4465 0.4184 0.3930 0.3128 0.2558 0.2136 0.1813 0.156 0.1358 0.1193 0.1057 0.0943 0.0847 0.0766 0.0695 0.0634

135 0.5016 0.4683 0.4386 0.4117 0.3270 0.2671 0.2228 0.1890 0.1625 0.1414 0.1242 0.1100 0.0982 0.0881 0.0796 0.0723 0.0659

140 0.5260 0.4907 0.4591 0.4308 0.3414 0.2785 0.2321 0.1967 0.1691 0.147 0.1291 0.1143 0.1020 0.0916 0.0827 0.0751 0.0685

145 0.5511 0.5136 0.4802 0.4502 0.3561 0.2900 0.2414 0.2045 0.1757 0.1527 0.1340 0.1187 0.1058 0.0950 0.0858 0.0778 0.0710

150 0.5767 0.5370 0.5017 0.4700 0.3709 0.3017 0.2509 0.2124 0.1823 0.1584 0.1390 0.1230 0.1097 0.0984 0.0889 0.0806 0.0735

155 0.6031 0.5610 0.5236 0.4902 0.3860 0.3135 0.2604 0.2203 0.189 0.1641 0.1440 0.1274 0.1136 0.1019 0.0920 0.0834 0.0761

160 0.6302 0.5856 0.5461 0.5108 0.4013 0.3254 0.2701 0.2283 0.1957 0.1699 0.1490 0.1318 0.1174 0.1054 0.0951 0.0863 0.0786

165 0.6580 0.6108 0.5690 0.5319 0.4169 0.3375 0.2798 0.2363 0.2025 0.1757 0.1540 0.1362 0.1213 0.1088 0.0982 0.0891 0.0812

170 0.6866 0.6366 0.5925 0.5534 0.4327 0.3498 0.2897 0.2444 0.2094 0.1815 0.1591 0.1406 0.1253 0.1123 0.1013 0.0919 0.0838

175 0.7161 0.6631 0.6166 0.5754 0.4487 0.3621 0.2996 0.2526 0.2162 0.1874 0.1641 0.1451 0.1292 0.1158 0.1045 0.0947 0.0863

180 0.7464 0.6904 0.6413 0.5978 0.4651 0.3747 0.3096 0.2608 0.2231 0.1933 0.1693 0.1495 0.1331 0.1193 0.1076 0.0976 0.0889

185 0.7777 0.7184 0.6665 0.6208 0.4816 0.3874 0.3197 0.2691 0.2301 0.1993 0.1744 0.1540 0.1371 0.1229 0.1108 0.1004 0.0915

190 0.8100 0.7472 0.6925 0.6444 0.4985 0.4003 0.3300 0.2775 0.2371 0.2052 0.1796 0.1585 0.1411 0.1264 0.1140 0.1033 0.0941

195 0.8434 0.7769 0.7191 0.6685 0.5157 0.4133 0.3403 0.2860 0.2442 0.2113 0.1847 0.1631 0.1451 0.1300 0.1171 0.1062 0.0967

200 0.8780 0.8075 0.7465 0.6931 0.5331 0.4265 0.3508 0.2945 0.2513 0.2173 0.1900 0.1676 0.1491 0.1335 0.1203 0.1090 0.0993


Sepam 1000+42


I/Ib 4.80 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 12.50 15.00 17.50 20.00

Es (%)

50 0.0219 0.0202 0.0167 0.0140 0.0119 0.0103 0.0089 0.0078 0.0069 0.0062 0.0056 0.0050 0.0032 0.0022 0.0016 0.0013

55 0.0242 0.0222 0.0183 0.0154 0.0131 0.0113 0.0098 0.0086 0.0076 0.0068 0.0061 0.0055 0.0035 0.0024 0.0018 0.0014

60 0.0264 0.0243 0.0200 0.0168 0.0143 0.0123 0.0107 0.0094 0.0083 0.0074 0.0067 0.0060 0.0038 0.0027 0.0020 0.0015

65 0.0286 0.0263 0.0217 0.0182 0.0155 0.0134 0.0116 0.0102 0.0090 0.0081 0.0072 0.0065 0.0042 0.0029 0.0021 0.0016

70 0.0309 0.0284 0.0234 0.0196 0.0167 0.0144 0.0125 0.0110 0.0097 0.0087 0.0078 0.0070 0.0045 0.0031 0.0023 0.0018

75 0.0331 0.0305 0.0251 0.0211 0.0179 0.0154 0.0134 0.0118 0.0104 0.0093 0.0083 0.0075 0.0048 0.0033 0.0025 0.0019

80 0.0353 0.0325 0.0268 0.0225 0.0191 0.0165 0.0143 0.0126 0.0111 0.0099 0.0089 0.0080 0.0051 0.0036 0.0026 0.0020

85 0.0376 0.0346 0.0285 0.0239 0.0203 0.0175 0.0152 0.0134 0.0118 0.0105 0.0095 0.0085 0.0055 0.0038 0.0028 0.0021

90 0.0398 0.0367 0.0302 0.0253 0.0215 0.0185 0.0161 0.0142 0.0125 0.0112 0.0100 0.0090 0.0058 0.0040 0.0029 0.0023

95 0.0421 0.0387 0.0319 0.0267 0.0227 0.0196 0.0170 0.0150 0.0132 0.0118 0.0106 0.0095 0.0061 0.0042 0.0031 0.0024

100 0.0444 0.0408 0.0336 0.0282 0.0240 0.0206 0.0179 0.0157 0.0139 0.0124 0.0111 0.0101 0.0064 0.0045 0.0033 0.0025

105 0.0466 0.0429 0.0353 0.0296 0.0252 0.0217 0.0188 0.0165 0.0146 0.0130 0.0117 0.0106 0.0067 0.0047 0.0034 0.0026

110 0.0489 0.0450 0.0370 0.0310 0.0264 0.0227 0.0197 0.0173 0.0153 0.0137 0.0123 0.0111 0.0071 0.0049 0.0036 0.0028

115 0.0512 0.0471 0.0388 0.0325 0.0276 0.0237 0.0207 0.0181 0.0160 0.0143 0.0128 0.0116 0.0074 0.0051 0.0038 0.0029

120 0.0535 0.0492 0.0405 0.0339 0.0288 0.0248 0.0216 0.0189 0.0167 0.0149 0.0134 0.0121 0.0077 0.0053 0.0039 0.0030

125 0.0558 0.0513 0.0422 0.0353 0.0300 0.0258 0.0225 0.0197 0.0175 0.0156 0.0139 0.0126 0.0080 0.0056 0.0041 0.0031

130 0.0581 0.0534 0.0439 0.0368 0.0313 0.0269 0.0234 0.0205 0.0182 0.0162 0.0145 0.0131 0.0084 0.0058 0.0043 0.0033

135 0.0604 0.0555 0.0457 0.0382 0.0325 0.0279 0.0243 0.0213 0.0189 0.0168 0.0151 0.0136 0.0087 0.0060 0.0044 0.0034

140 0.0627 0.0576 0.0474 0.0397 0.0337 0.0290 0.0252 0.0221 0.0196 0.0174 0.0156 0.0141 0.0090 0.0062 0.0046 0.0035

145 0.0650 0.0598 0.0491 0.0411 0.0349 0.0300 0.0261 0.0229 0.0203 0.0181 0.0162 0.0146 0.0093 0.0065 0.0047 0.0036

150 0.0673 0.0619 0.0509 0.0426 0.0361 0.0311 0.0270 0.0237 0.0210 0.0187 0.0168 0.0151 0.0096 0.0067 0.0049 0.0038

155 0.0696 0.0640 0.0526 0.0440 0.0374 0.0321 0.0279 0.0245 0.0217 0.0193 0.0173 0.0156 0.0100 0.0069 0.0051 0.0039

160 0.0720 0.0661 0.0543 0.0455 0.0386 0.0332 0.0289 0.0253 0.0224 0.0200 0.0179 0.0161 0.0103 0.0071 0.0052 0.0040

165 0.0743 0.0683 0.0561 0.0469 0.0398 0.0343 0.0298 0.0261 0.0231 0.0206 0.0185 0.0166 0.0106 0.0074 0.0054 0.0041

170 0.0766 0.0704 0.0578 0.0484 0.0411 0.0353 0.0307 0.0269 0.0238 0.0212 0.0190 0.0171 0.0109 0.0076 0.0056 0.0043

175 0.0790 0.0726 0.0596 0.0498 0.0423 0.0364 0.0316 0.0277 0.0245 0.0218 0.0196 0.0177 0.0113 0.0078 0.0057 0.0044

180 0.0813 0.0747 0.0613 0.0513 0.0435 0.0374 0.0325 0.0285 0.0252 0.0225 0.0201 0.0182 0.0116 0.0080 0.0059 0.0045

185 0.0837 0.0769 0.0631 0.0528 0.0448 0.0385 0.0334 0.0293 0.0259 0.0231 0.0207 0.0187 0.0119 0.0083 0.0061 0.0046

190 0.0861 0.0790 0.0649 0.0542 0.0460 0.0395 0.0344 0.0301 0.0266 0.0237 0.0213 0.0192 0.0122 0.0085 0.0062 0.0048

195 0.0884 0.0812 0.0666 0.0557 0.0473 0.0406 0.0353 0.0309 0.0274 0.0244 0.0218 0.0197 0.0126 0.0087 0.0064 0.0049

200 0.0908 0.0834 0.0684 0.0572 0.0485 0.0417 0.0362 0.0317 0.0281 0.0250 0.0224 0.0202 0.0129 0.0089 0.0066 0.0050


Sepam 1000+ 43

I/Ib 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80Es (%)

105 0.6690 0.2719 0.1685 0.1206 0.0931 0.0752 0.0627 0.0535 0.0464 0.0408 0.0363 0.0326 0.0295 0.0268 0.0245 0.0226

110 3.7136 0.6466 0.3712 0.2578 0.1957 0.1566 0.1296 0.1100 0.0951 0.0834 0.0740 0.0662 0.0598 0.0544 0.0497 0.0457

115 1.2528 0.6257 0.4169 0.3102 0.2451 0.2013 0.1699 0.1462 0.1278 0.1131 0.1011 0.0911 0.0827 0.0755 0.0693

120 3.0445 0.9680 0.6061 0.4394 0.3423 0.2786 0.2336 0.2002 0.1744 0.1539 0.1372 0.1234 0.1118 0.1020 0.0935

125 1.4925 0.8398 0.5878 0.4499 0.3623 0.3017 0.2572 0.2231 0.1963 0.1747 0.1568 0.1419 0.1292 0.1183

130 2.6626 1.1451 0.7621 0.5705 0.4537 0.3747 0.3176 0.2744 0.2407 0.2136 0.1914 0.1728 0.1572 0.1438

135 1.5870 0.9734 0.7077 0.5543 0.4535 0.3819 0.3285 0.2871 0.2541 0.2271 0.2048 0.1860 0.1699

140 2.3979 1.2417 0.8668 0.6662 0.5390 0.4507 0.3857 0.3358 0.2963 0.2643 0.2378 0.2156 0.1967

145 1.6094 1.0561 0.7921 0.6325 0.5245 0.4463 0.3869 0.3403 0.3028 0.2719 0.2461 0.2243

150 2.1972 1.2897 0.9362 0.7357 0.6042 0.5108 0.4408 0.3864 0.3429 0.3073 0.2776 0.2526

155 3.8067 1.5950 1.1047 0.8508 0.6909 0.5798 0.4978 0.4347 0.3846 0.3439 0.3102 0.2817

160 2.0369 1.3074 0.9808 0.7857 0.6539 0.5583 0.4855 0.4282 0.3819 0.3438 0.3118

165 2.8478 1.5620 1.1304 0.8905 0.7340 0.6226 0.5390 0.4738 0.4215 0.3786 0.3427

170 1.9042 1.3063 1.0076 0.8210 0.6914 0.5955 0.5215 0.4626 0.4146 0.3747

175 2.4288 1.5198 1.1403 0.9163 0.7652 0.6554 0.5717 0.5055 0.4520 0.4077

180 3.5988 1.7918 1.2933 1.0217 0.8449 0.7191 0.6244 0.5504 0.4908 0.4418

185 2.1665 1.4739 1.1394 0.9316 0.7872 0.6802 0.5974 0.5312 0.4772

190 2.7726 1.6946 1.2730 1.0264 0.8602 0.7392 0.6466 0.5733 0.5138

195 4.5643 1.9782 1.4271 1.1312 0.9390 0.8019 0.6985 0.6173 0.5518

200 2.3755 1.6094 1.2483 1.0245 0.8688 0.7531 0.6633 0.5914

I/Ib 1.85 1.90 1.95 2.00 2.20 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80 4.00 4.20 4.40 4.60

Es (%)

105 0.0209 0.0193 0.0180 0.0168 0.0131 0.0106 0.0087 0.0073 0.0063 0.0054 0.0047 0.0042 0.0037 0.0033 0.0030 0.0027 0.0025

110 0.0422 0.0391 0.0363 0.0339 0.0264 0.0212 0.0175 0.0147 0.0126 0.0109 0.0095 0.0084 0.0075 0.0067 0.0060 0.0055 0.0050

115 0.0639 0.0592 0.0550 0.0513 0.0398 0.0320 0.0264 0.0222 0.0189 0.0164 0.0143 0.0126 0.0112 0.0101 0.0091 0.0082 0.0075

120 0.0862 0.0797 0.0740 0.0690 0.0535 0.0429 0.0353 0.0297 0.0253 0.0219 0.0191 0.0169 0.0150 0.0134 0.0121 0.0110 0.0100

125 0.1089 0.1007 0.0934 0.0870 0.0673 0.0540 0.0444 0.0372 0.0317 0.0274 0.0240 0.0211 0.0188 0.0168 0.0151 0.0137 0.0125

130 0.1322 0.1221 0.1132 0.1054 0.0813 0.0651 0.0535 0.0449 0.0382 0.0330 0.0288 0.0254 0.0226 0.0202 0.0182 0.0165 0.0150

135 0.1560 0.1440 0.1334 0.1241 0.0956 0.0764 0.0627 0.0525 0.0447 0.0386 0.0337 0.0297 0.0264 0.0236 0.0213 0.0192 0.0175

140 0.1805 0.1664 0.1540 0.1431 0.1100 0.0878 0.0720 0.0603 0.0513 0.0443 0.0386 0.0340 0.0302 0.0270 0.0243 0.0220 0.0200

145 0.2055 0.1892 0.1750 0.1625 0.1246 0.0993 0.0813 0.0681 0.0579 0.0499 0.0435 0.0384 0.0341 0.0305 0.0274 0.0248 0.0226

150 0.2312 0.2127 0.1965 0.1823 0.1395 0.1110 0.0908 0.0759 0.0645 0.0556 0.0485 0.0427 0.0379 0.0339 0.0305 0.0276 0.0251

155 0.2575 0.2366 0.2185 0.2025 0.1546 0.1228 0.1004 0.0838 0.0712 0.0614 0.0535 0.0471 0.0418 0.0374 0.0336 0.0304 0.0277

160 0.2846 0.2612 0.2409 0.2231 0.1699 0.1347 0.1100 0.0918 0.0780 0.0671 0.0585 0.0515 0.0457 0.0408 0.0367 0.0332 0.0302

165 0.3124 0.2864 0.2639 0.2442 0.1855 0.1468 0.1197 0.0999 0.0847 0.0729 0.0635 0.0559 0.0496 0.0443 0.0398 0.0360 0.0328

170 0.3410 0.3122 0.2874 0.2657 0.2012 0.1591 0.1296 0.1080 0.0916 0.0788 0.0686 0.0603 0.0535 0.0478 0.0430 0.0389 0.0353

175 0.3705 0.3388 0.3115 0.2877 0.2173 0.1715 0.1395 0.1161 0.0984 0.0847 0.0737 0.0648 0.0574 0.0513 0.0461 0.0417 0.0379

180 0.4008 0.3660 0.3361 0.3102 0.2336 0.1840 0.1495 0.1244 0.1054 0.0906 0.0788 0.0692 0.0614 0.0548 0.0493 0.0446 0.0405

185 0.4321 0.3940 0.3614 0.3331 0.2502 0.1967 0.1597 0.1327 0.1123 0.0965 0.0839 0.0737 0.0653 0.0583 0.0524 0.0474 0.0431

190 0.4644 0.4229 0.3873 0.3567 0.2671 0.2096 0.1699 0.1411 0.1193 0.1025 0.0891 0.0782 0.0693 0.0619 0.0556 0.0503 0.0457

195 0.4978 0.4525 0.4140 0.3808 0.2842 0.2226 0.1802 0.1495 0.1264 0.1085 0.0943 0.0828 0.0733 0.0654 0.0588 0.0531 0.0483

200 0.5324 0.4831 0.4413 0.4055 0.3017 0.2358 0.1907 0.1581 0.1335 0.1145 0.0995 0.0873 0.0773 0.0690 0.0620 0.0560 0.0509

Hot curvesfor Eso = 0

Sepam 1000+44


I/Ib 4.80 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 12.50 15.00 17.50 20.00

Es (%)

105 0.0023 0.0021 0.0017 0.0014 0.0012 0.0010 0.0009 0.0008 0.0007 0.0006 0.0006 0.0005 0.0003 0.0002 0.0002 0.0001

110 0.0045 0.0042 0.0034 0.0029 0.0024 0.0021 0.0018 0.0016 0.0014 0.0013 0.0011 0.0010 0.0006 0.0004 0.0003 0.0003

115 0.0068 0.0063 0.0051 0.0043 0.0036 0.0031 0.0027 0.0024 0.0021 0.0019 0.0017 0.0015 0.0010 0.0007 0.0005 0.0004

120 0.0091 0.0084 0.0069 0.0057 0.0049 0.0042 0.0036 0.0032 0.0028 0.0025 0.0022 0.0020 0.0013 0.0009 0.0007 0.0005

125 0.0114 0.0105 0.0086 0.0072 0.0061 0.0052 0.0045 0.0040 0.0035 0.0031 0.0028 0.0025 0.0016 0.0011 0.0008 0.0006

130 0.0137 0.0126 0.0103 0.0086 0.0073 0.0063 0.0054 0.0048 0.0042 0.0038 0.0034 0.0030 0.0019 0.0013 0.0010 0.0008

135 0.0160 0.0147 0.0120 0.0101 0.0085 0.0073 0.0064 0.0056 0.0049 0.0044 0.0039 0.0035 0.0023 0.0016 0.0011 0.0009

140 0.0183 0.0168 0.0138 0.0115 0.0097 0.0084 0.0073 0.0064 0.0056 0.0050 0.0045 0.0040 0.0026 0.0018 0.0013 0.0010

145 0.0206 0.0189 0.0155 0.0129 0.0110 0.0094 0.0082 0.0072 0.0063 0.0056 0.0051 0.0046 0.0029 0.0020 0.0015 0.0011

150 0.0229 0.0211 0.0172 0.0144 0.0122 0.0105 0.0091 0.0080 0.0070 0.0063 0.0056 0.0051 0.0032 0.0022 0.0016 0.0013

155 0.0253 0.0232 0.0190 0.0158 0.0134 0.0115 0.0100 0.0088 0.0077 0.0069 0.0062 0.0056 0.0035 0.0025 0.0018 0.0014

160 0.0276 0.0253 0.0207 0.0173 0.0147 0.0126 0.0109 0.0096 0.0085 0.0075 0.0067 0.0061 0.0039 0.0027 0.0020 0.0015

165 0.0299 0.0275 0.0225 0.0187 0.0159 0.0136 0.0118 0.0104 0.0092 0.0082 0.0073 0.0066 0.0042 0.0029 0.0021 0.0016

170 0.0323 0.0296 0.0242 0.0202 0.0171 0.0147 0.0128 0.0112 0.0099 0.0088 0.0079 0.0071 0.0045 0.0031 0.0023 0.0018

175 0.0346 0.0317 0.0260 0.0217 0.0183 0.0157 0.0137 0.0120 0.0106 0.0094 0.0084 0.0076 0.0048 0.0034 0.0025 0.0019

180 0.0370 0.0339 0.0277 0.0231 0.0196 0.0168 0.0146 0.0128 0.0113 0.0101 0.0090 0.0081 0.0052 0.0036 0.0026 0.0020

185 0.0393 0.0361 0.0295 0.0246 0.0208 0.0179 0.0155 0.0136 0.0120 0.0107 0.0096 0.0086 0.0055 0.0038 0.0028 0.0021

190 0.0417 0.0382 0.0313 0.0261 0.0221 0.0189 0.0164 0.0144 0.0127 0.0113 0.0101 0.0091 0.0058 0.0040 0.0030 0.0023

195 0.0441 0.0404 0.0330 0.0275 0.0233 0.0200 0.0173 0.0152 0.0134 0.0119 0.0107 0.0096 0.0061 0.0043 0.0031 0.0024

200 0.0464 0.0426 0.0348 0.0290 0.0245 0.0211 0.0183 0.0160 0.0141 0.0126 0.0113 0.0102 0.0065 0.0045 0.0033 0.0025

Hot curvesfor Eso = 0

Sepam 1000+ 45

OperationThis protection is single-phase:c it picks up when phase 1 current drops below the Isset point,c it is inactive when the current is less than 10% of Ib,c it is insensitive to current drops (breaking) due tocircuit breaker tripping,c it includes a definite time delay T.

ANSI code 37

Block diagramPhase undercurrent

Is set point

setting 15% Ib i Is i 100% Ib by steps of 1%

accuracy ±5%

pick-up/drop-out ratio 106% ±5% for Is > 0.1 In

T time delay

setting 50 ms i T i 300 s

accuracy (1) ±2% or ±25 ms



operating time < 50 ms



Case of circuit breaker tripping.

t

T

0 0.1 Ib Is I

“pick up”signal

1.06 IsIs

0.1 Ib

time-delayedoutput

15ms

&I < IsI1

I >0.1 Ib

0T0

“pick-up”signal

time-delayedoutput”

Case of current sag

Operating principle

Characteristics

1.06 IsIs

0.1 Ib

time-delayedoutput = 0

“pick up”signal = 0 <15 ms

Sepam 1000+46


Excessive starting time,locked rotor

OperationThis function is three-phase.It comprises two parts:c excessive starting time: during starting, the protection picks up when oneof the 3 phase currents is greater than the set point Is for a longer period of timethan the ST time delay (normal starting time),c locked rotor:v at the normal operating rate (after starting), the protection picks up when oneof the 3 phase currents is greater than the set point Is for a longer period of timethan the LT time delay of the definite time type.v locked on start: large motors may have very long starting time,due to their inertia or the reduce voltage supply. This starting time is longer thanthe permissive rotor blocking time. To protect such a motor LTS timer initiate a tripif a start has been detected (I > Is) or if the motor speed is zero. For a normal start,the input I23 (zero-speed-switch) disable this protection.

Motor re-accelerationWhen the motor re-accelerates, it consumes a current in the vicinity of the startingcurrent (> Is) without the current first passing through a value less than 10% of Ib.The ST time delay, which corresponds to the normal starting time, may bereinitialized by a logic data input for particular uses (input I22).c reinitialize the excessive starting time protection,c set the locked rotor protection LT time delay to a low value.

Starting is detected when the current consumed is 10% greater than the Ib curent.

Is set point

setting 50% Ib i Is i 500% Ib

resolution 1%

accuracy (1) ±5%

pick-up/drop-out ratio 93.5% ±5%

ST and LT time delays

setting ST 500 ms i T i 300 s

LT 50 ms i T i 300 s

LTS 50 ms i T i 300 s


accuracy (1) ±2% or ±25 ms(1) in reference conditions (IEC 60255-6).

ANSI code 48 - 51LR

Case of normal starting.

ST

lockedrotor

excessivestarting time

0.1Ib

Is

I

Case of excessive starting time.

0.1Ib

Is

ST

I

lockedrotor


Case of locked rotor.

0.1Ib

Is

ST LT

I

lockedrotor


Block diagram

Characteristics

locked rotorat output

0ST0LT

lockedrotor output

startingtime output

I1I2I3

I>Is

I>0.1Ib

input I22

&

&

&input I23

0LTS

≥1 trippingoutput

≥1

R

Sepam 1000+ 47

ANSI code 66

Starts per hour

I>0.1IbI1I2I3

≥1

&

P mn/Nt

P mn

k1>Nt

k2>Nc

k3>Nh

P mn/Nt

&T0

≥1 inhibitclosing

thermal alarm(hot state)

"Clear"

input I22

Block diagram

period of time (P)

setting 1 to 6 hour

resolution 1

Nt total number of starts

setting 1 to 60

resolution 1

Nh and Nc number of consecutive starts

setting (2) 1 to Nt

resolution 1

T time delay between starts

setting 0 mn i T i 90 mn

resolution 1 mn or 1 digit

waiting time measurement

measurement range 0 mn to 360 mn

resolution 1 mn

measurement of the number N of starts allowed


resolution 1(1) Sepam equipped with advanced UMI.(2) with Nh i Nc.

OperationThis function is three-phase.It picks up when the number of starts reachesthe following limits:c maximum number of starts allowed per periodof time (P) (Nt),c maximum allowed number of consecutivehot starts (Nh),c maximum allowed number of consecutivecold starts (Nc),c the function indicates the number of starts stillallowed before the maximum, if the protection has notpicked up. The number of starts depends on themotor’s thermal state,c waiting time before a start is allowed, if theprotection has picked up.

Starting is detected when the current consumedbecomes greater than 10% of the Ib current.

The number of consecutive starts is the number starts counted duringthe last P/Nt minutes, Nt being the number of starts allowed per period.

The motor hot state corresponds to the overshooting of the fixed set point(50% heat rise) of the thermal overload function.

When the motor re-accelerates, it undergoes a stress similar to that of startingwithout the current first passing through a value less than 10% of Ib, in which casethe number of starts is not incremented.

It is possible however to increment the number of starts when a re-accelerationoccurs by a logic data input (input I22).

Characteristics

ReadoutThe number of starts and the waiting time may beaccessed via:c the display (1) using the key,c the screen of a PC with SFT 2841 software,c the communication link.

ClearingThe number of starts counters may be cleared, usinga password, via:c the display using the clear key (1),c the screen of a PC with SFT 2841 software.

Sepam 1000+48

ANSI code 27

Phase-to-phaseundervoltage

OperationThis protection is three-phase:c it picks up when one of the phase-to-phase voltagesconcerned is less than the set point Us,c the protection includes a definite time delay.

Us set point

setting 5% Unp to 100% Unp

accuracy (1) ±2% or 0.005 Unp

resolution 1%

pick up/drop-out ratio 103% ±2.5%

T time delay

setting 50 ms to 300 s

accuracy (1) ±2%, or ±25 ms



operating time pick up < 35 ms (25 ms typical)



Block diagram

U < Us0T

time-delayed output

“pick up” signal

U21U32U13

Characteristics


Operation

Positive sequence undervoltageThe protection picks up when the positive sequencecomponent Vd of a three-phase voltage system dropsbelow the Vsd set point with:

c it includes a definite time delay T,c it allows drops in motor electrical torque to bedetected.

Phase rotation directionThis protection also allows the phase rotationdirection to be detected.

The protection considers that the phase rotationdirection is inverse when the positive sequencevoltage is less than 10% of Unp and when the phase-to-phase voltage is greater than 80% of Unp.

Positive sequenceundervoltage and phaserotation direction check

ANSI code 27D - 47

Block diagram

time-delayed output

“pick-up” signal

rotation display(2)

U21(or V1)

Vd 0TVd < Vsd

Vd <0.1Un

U >0.8 Un

&

Vsd set point


accuracy (1) ±2%

pick-up/drop-out ratio 103% ±2.5%

resolution 1%

T time delay





operating time pick up < 55 ms


reset time < 35 ms(1) in reference conditions (IEC 60255-6).(2) displays “rotation” instead of positive sequence voltage measurement.

Characteristics

Vd = (1/3) [V1 + a V2 + a2 V3]

Vd = (1/3) [U21 - a2 U32]

Uwith V = and a = e

eeeee

→ → →

→ →

→

→

2πj

3

Sepam 1000+ 49

ANSI code 27S

OperationThis protection is three-phase:c it picks up when one of the 3 phase-to-neutralvoltages drops below the Vs set point.c it has 3 independent outputs available for thecontrol matrixc it is operational if the number of VTs connected isV1, V2, V3 or U21, U32 with measurement of Vo.

Phase-to-neutralundervoltage

Block diagram

Caracteristics

V1 < Vs0T

time-delayed output

“pick up” signal

V1

V2 < VsV2

V3 < VsV3

0T

0T

time-delayed output

time-delayed output

≥ 1

VS set point

setting 5% Vnp to 100% Vnp

accuracy (1) ±2% or 0.005 Vnp

resolution 1%

pick up/drop-out ratio 103% ±2.5%

T time delay







reset time < 40 ms(1) in reference conditions (IEC 60255-6)

ANSI code 59

OperationThis protection is three-phase:c it picks up when one of the phase-to-phase voltagesconcerned is greater than the Us set point,c the protection includes a definite time delay.

Phase-to-phaseovervoltage Us set point

setting 50% Unp to 150% Unp (2)

accuracy (1) ±2% or 0.005 Unp

resolution 1%

pick-up/drop-out ratio 97% ±1%

T time delay






overrun time < 35 ms

reset time < 40 ms(1) in reference conditions (IEC 60255-6)(2) 135% Unp with PT’s 230 V / e

Block diagram

U > Us0T

time-delayed output


U21U32U13

Characteristics

Sepam 1000+50

Neutral voltage displacement

Block diagram

V0 > Vso0T time-delayed

output

V1

V2

V3

external VT “pick-up”signal

Σ

Vso set point

setting 2% Unp to 80% Unp if Vnso (2) = sum 3 V2% Unp to 80% Unp if Vnso (2) = Uns / e5% Unp to 80% Unp if Vnso (2) = Uns / 3

accuracy (1) ±2% or ±0.005 Unp

resolution 1%

pick-up/drop-out ratio 97% +1%

T time delay





operating time pick up < 55 ms


reset time < 55 ms(1) in reference conditions (IEC 60255-6).(2) Vnso is one of the general parameters.

Characteristics

ANSI code 59N

OperationThis protection picks up when the neutral voltage Vois greater than a Vso set point

with V0 = V1 + V2 + V3,

c it includes a definite time delay T,c neutral voltage is either calculated from the3 phase voltages or measured by an external VT.

→ → → →


Characteristics

ANSI code 27R

OperationThis protection is single-phase:c it picks up when the U21 phase-to-phase voltageis less than the Us set point,c the protection includes a definite time delay.

Remanent undervoltage

Block diagram

U < Us0T

time-delayed outputU21(or V1)


Us set point


accuracy ±5% or ±0.005 Unp

pick-up/drop-out ratio 103% ±2.5%

resolution 1%

T time delay





operating time < 40 ms

overrun time < 20 ms


Sepam 1000+ 51

ANSI code 81H

OperationThis function picks up when the frequency of thepositive sequence voltage is greater than the set pointand if the positive sequence voltage is more than20% of Vnp (Unp/e).

If only one VT is connected (U21), the function picksup when the frequency is greater than the set pointand if the U21 voltage is more than 20% of Unp.

It includes a definite time delay T.

Overfrequency

Fs set point

setting 50 to 53 Hz or 60 to 63 Hz

resolution 0.1 Hz


pick-up/drop-out difference 0.2 Hz ±0.1 Hz

T time delay







reset time < 100 ms(1) in reference conditions (IEC 60255-6) and df/dt < 3 Hz/s.

If there is only one sensor (U21), the voltage signal is connected to terminals 1 and2 of the connector CCT 640, whatever the phase.

Block diagram

(1) or U21 > 0.2 Unp if only one VT

time-delayedoutput

U32

F > FsU21


0T&

Vd

Vd > 0.2 Vnp(1)

Characteristics

Sepam 1000+52


Rate of change of frequency

OperationThis function picks up when the rate of change offrequency (ROCOF) of the positive sequence voltageovershoots the set point.If only one VT is connected (U21), the function isinhibited.


ANSI code 81R

Bloc diagram

dFs / dt set point

setting 0.1 to 10 Hz/s

resolution 0.1 Hz/s

accuracy tripping ±5 % or ±0.1 Hz/s

no tripping ±3 % or ±0.05 Hz/s

T time delay


accuracy ±2 % or ±25 ms


temps caractéristiques (1)



reset time < 100 ms(1) in reference conditions (IEC 60255-6)

Characteristics

Underfrequency

OperationThis function picks up when the frequency of thepositive sequence voltage is less than the set pointand if the positive sequence voltage is more than20% of Vnp (Unp/e).

If only one VT is connected (U21), the function picksup when the frequency is less than the set point andif the U21 voltage is more than 20% of Unp.


Bloc diagram

If there is only one sensor (U21), the voltage signal is connected to terminals1 and 2 of the connector CCT 640, whatever the phase.

(1) or U21 > 0.2 Unp if only one VT.

ANSI code 81L Vdtime-delayedoutput

U32

F < FsU21


0T&

Vd > 0.2 Vnp (1)

Fs set point

setting 45 to 50 Hz or 55 to 60 Hz

resolution 0.1 Hz


pick-up/drop-out difference 0.2 Hz ±0.1 Hz

T time delay







reset time < 100 ms(1) in reference conditions (IEC 60255-6) and df/dt < 3 Hz/s

Characteristics

time delayedoutput

signal “pick up”

Vd f

> 0.5 Vn

> Fmin

< Fmax

& dF/dt

> + dFs/dt

< - dFs/dt

≥ 10T

Sepam 1000+ 53

Temperature monitoring

OperationThis protection is associated with an RTD of thePt100 platinum (100 Ω at 0°C) or (nickel 100 Ω,nickel 120 Ω) type in accordance with the IEC 60751and DIN 43760 standards.

c It picks up when the monitored temperature isgreater than the Ts set point.c It has two independent set points:v alarm set point,v tripping set point.

c When the protection is activated, it detects whetherthe RTD is shorted or disconnected:v RTD shorting is detected if the measuredtemperature is less than –35°C (measurementdisplayed “****”),v RTD disconnection is detected if the measuredtemperature is greater than +205°C (measurementdisplayed “-****”).If an RTD fault is detected, the set point output relaysare inhibited: the protection outputs are set to zero.The "RTD fault" item is also made available in thecontrol matrix and an alarm message is generated.

Block diagram

ANSI code 49T - 38

RTD

set point 1

set point 2

RTD’s fault

T > Ts1

T > Ts2

T < +205° C

&

&

T > -35° C

Ts1 and Ts2 set points °C °F

setting 0°C to 180°C 32°F to 356°F

accuracy (1) ±1.5°C ±2.7°F

resolution 1°C 1°Fpick-up/drop-out difference 3°C ±0.5°characteristic times

operating time < 5 seconds(1) see temperature measurement chapter for accuracy derating according towiring cross-section

Characteristics

Sepam 1000+54

Recloser

Recloser initializationThe recloser is ready to operate if all of the following conditions are met:c "circuit breaker control" function activated and recloser in service,c circuit breaker closed,c inhibition time delay not running,c none of the recloser inhibition conditions is true (see below).

Cyclesc Case of a cleared fault:v if, after a reclosing order, the fault does not appear after the disengaging timedelay has expired, the recloser reinitializes and a message appears on the display(cf. example 1).

c Case of a permanent fault, not cleared:v after the instantaneous or time-delayed protection has tripped, the isolation timedelay associated with the first active cycle starts up. When it runs out, a closingorder is given and this order starts up the disengagement time delay.If the protection detects the fault before the end of the time delay, a trip order isgiven and the next reclosing cycle is activated,v if the fault persists after all the active cycles have taken place, a permanent triporder is given, a message appears on the display and closing is inhibited until theuser has acknowledged the fault, according to the protection parameter setting.

c Closing on a faultIf the circuit breaker closes when the fault occurs, or if the fault appears beforethe end of the inhibition time delay, the recloser is inhibited.

Recloser inhibition conditionsThe recloser is inhibited according to the following conditions:c close or trip command,c recloser disabled,c receipt of an inhibition order on inhibition input I26,c appearance of a fault related to the switchgear, such as trip circuit or control fault,c receipt of an external tripping order via inputs I21, I22 or I23.

ANSI code 79


Characteristics

reclosing cycles setting

number of cycles 1 to 4

activation of cycle 1 (1) O/C 1 inst. / time-del. / inactiveO/C 2 inst. / time-del. / inactiveE/F 1 inst. / time-del. / inactiveE/F 2 inst. / time-del. / inactive

activation of cycles 2, 3 and 4 (1) O/C 1 inst. / time-del. / inactiveO/C 2 inst. / time-del. / inactiveE/F 1 inst. / time-del. / inactiveE/F 2 inst. / time-del. / inactive

time delays

disengagement time delay 0.05 to 300 sisolation time delay cycle 1 0.05 to 300 s

cycle 2 0.05 to 300 scycle 3 0.05 to 300 scycle 4 0.05 to 300 s

inhibition time delay 0.05 to 300 s

accuracy ±2% or 25 ms


(1) if, during a reclosing cycle, a protection set as inactive with respect to the recloser triggerstripping, the recloser is inhibited.

Sepam 1000+ 55

Instantaneous O/C

Time-delayed O/C

CB open command

I11 (open position)

CB close command

Reclosingsuccessful (TS37)

Reclosing inprogress (TS35)

I12 (closed position)

inhibition time delay

300 ms

cycle 1 isolation time delay

disengagementtime delay

“cleared fault ”message

Example 1: case of successful reclosing after the first cycle. Activation with 300 ms time-delayed O/C protection.

Instantaneous O/C

Time-delayed O/C

CB open command

I11 (open position)

CB close command

Definitive tripping(TS37)

Reclosing inprogress (TS35)

I12 (closed position)

cycle 1isolation timedelay

300 ms 300 ms 300 ms

cycle 2isolationtime delay

“permanent fault”message

inhibition timedelay

Example 2: case of definitive tripping after two cycles activated by 300 ms time-delayed O/C protection.

Sepam 1000+56


IDMT protectionsThe operation time depends on the protected variable(phase current, earth fault current, …).

Operation is represented by a characteristic curve:c t = f(I) curve for the phase overcurrent function,c t = f(Io) for the earth fault function.

The rest of the document is based on t = f(I),but the reasoning can be extended to other variablessuch as Io, …

The curve is defined by:c type (standard inverse, very inverse, extremelyinverse..),c Is current setting which corresponds to the verticalasymptote of the curve,c T time delay setting which corresponds to theoperation time for I = 10 Is.

The 3 settings are made in the following chronologicalorder: type, Is current, T time delay.

Changing the T time delay setting by x% changes allof the operation times in the curve by x%.

Examples of problems to be solved

Problem 1Knowing the type of IDMT, determine the Is currentand T time delay settings.

Theoretically, Is current is set to the maximum currentthat can be continuous:it is generally the rated current of the protectedequipment (cable, transformer).

T time delay is set to the operation point at 10 Is onthe curve. This setting is determined taking intoaccount the discrimination constraints with respect tothe upstream and downstream protection devices.

The discrimination constraint leads to the definition ofa point A on the operation curve (IA, tA), e.g. the pointthat corresponds to the maximum fault currentaffecting the downstream protection.

Problem 2Knowing the type of IDMT, the Is current setting anda point k (Ik, tk) on the operation curve, determinethe T time delay setting.

On the standard curve of the same type, read theoperation time tsk that corresponds to the relativecurrent:

and the operation time Ts10 that corresponds to therelative current:

I/Is

ts

Ts10

1 Ik/Is 10

tk

tsk

k

I = 10

Is

Ik

Is

Another practical method:The chart below gives the values of:

as a function of

In the column that corresponds to the type of time delay, read the value

in the line that corresponds to

The time delay setting to be used so that the operation curve pasees through

the point k(Ik, Tk) is:

ExampleGiven:c type of time delay: standard inverse time (SIT)c set point: Isc a point k on the operation curve: k (3.5 Is; 4 s)

Question: what is the T time delay setting (operation time at 10 Is)?

Chart reading: SIT column

line

k = 1.86

Answer: the time delay setting is:

Problem 3Knowing the Is current and T time delay settings for a type of time delay (standardinverse, very inverse, extremely inverse), find the operation time for a current valueof IA. On the standard curve of the same type, read the operation time tsA thatcorresponds to the relative current:

and the operation time Ts10 that corresponds to the relative current:

The operation time tA for the current IA with the Is and T settings is:

I/Is

ts

Ts10

1 IA/Is 10

tA

tsA

T

tsK =

ts10

Ik

Is

I

Is

tkT =

K

I= 3.5

Is

4T = = 2.15 s

1.86

IA

Is

I= 10

Is

TtA = tsA x

Ts10

tskK =

Ts10

tkT = Ts10 x

tsk

The time delay setting that should be made in order for the operation curve to passthrough point k(Ik, tk) is:

Sepam 1000+ 57

I/Is SIT VIT, LTI EIT UIT RI IEEE MI IEEE VI IEEE EI IAC I IAC VI IAC EIand IEC/A and IEC/B and IEC/C (IEC/D) (IEC/E) (IEC/F)

1.0 — — — — 3.062 — — — 62.005 62.272 200.2261.1 24.700(1) 90.000(1) 471.429(1) — 2.534 22.461 136.228 330.606 19.033 45.678 122.1721.2 12.901 45.000 225.000 545.905 2.216 11.777 65.390 157.946 9.413 34.628 82.8991.5 5.788 18.000 79.200 179.548 1.736 5.336 23.479 55.791 3.891 17.539 36.6872.0 3.376 9.000 33.000 67.691 1.427 3.152 10.199 23.421 2.524 7.932 16.1782.5 2.548 6.000 18.857 35.490 1.290 2.402 6.133 13.512 2.056 4.676 9.5663.0 2.121 4.500 12.375 21.608 1.212 2.016 4.270 8.970 1.792 3.249 6.5413.5 1.858 3.600 8.800 14.382 1.161 1.777 3.242 6.465 1.617 2.509 4.8724.0 1.676 3.000 6.600 10.169 1.126 1.613 2.610 4.924 1.491 2.076 3.8394.5 1.543 2.571 5.143 7.513 1.101 1.492 2.191 3.903 1.396 1.800 3.1465.0 1.441 2.250 4.125 5.742 1.081 1.399 1.898 3.190 1.321 1.610 2.6535.5 1.359 2.000 3.385 4.507 1.065 1.325 1.686 2.671 1.261 1.473 2.2886.0 1.292 1.800 2.829 3.616 1.053 1.264 1.526 2.281 1.211 1.370 2.0076.5 1.236 1.636 2.400 2.954 1.042 1.213 1.402 1.981 1.170 1.289 1.7867.0 1.188 1.500 2.063 2.450 1.033 1.170 1.305 1.744 1.135 1.224 1.6077.5 1.146 1.385 1.792 2.060 1.026 1.132 1.228 1.555 1.105 1.171 1.4608.0 1.110 1.286 1.571 1.751 1.019 1.099 1.164 1.400 1.078 1.126 1.3378.5 1.078 1.200 1.390 1.504 1.013 1.070 1.112 1.273 1.055 1.087 1.2339.0 1.049 1.125 1.238 1.303 1.008 1.044 1.068 1.166 1.035 1.054 1.1449.5 1.023 1.059 1.109 1.137 1.004 1.021 1.031 1.077 1.016 1.026 1.06710.0 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.00010.5 0.979 0.947 0.906 0.885 0.996 0.981 0.973 0.934 0.985 0.977 0.94111.0 0.959 0.900 0.825 0.787 0.993 0.963 0.950 0.877 0.972 0.957 0.88811.5 0.941 0.857 0.754 0.704 0.990 0.947 0.929 0.828 0.960 0.939 0.84112.0 0.925 0.818 0.692 0.633 0.988 0.932 0.912 0.784 0.949 0.922 0.79912.5 0.910 0.783 0.638 0.572 0.985 0.918 0.896 0.746 0.938 0.907 0.76113.0 0.895 0.750 0.589 0.518 0.983 0.905 0.882 0.712 0.929 0.893 0.72713.5 0.882 0.720 0.546 0.471 0.981 0.893 0.870 0.682 0.920 0.880 0.69514.0 0.870 0.692 0.508 0.430 0.979 0.882 0.858 0.655 0.912 0.868 0.66714.5 0.858 0.667 0.473 0.394 0.977 0.871 0.849 0.631 0.905 0.857 0.64115.0 0.847 0.643 0.442 0.362 0.976 0.861 0.840 0.609 0.898 0.846 0.61615.5 0.836 0.621 0.414 0.334 0.974 0.852 0.831 0.589 0.891 0.837 0.59416.0 0.827 0.600 0.388 0.308 0.973 0.843 0.824 0.571 0.885 0.828 0.57316.5 0.817 0.581 0.365 0.285 0.971 0.834 0.817 0.555 0.879 0.819 0.55417.0 0.808 0.563 0.344 0.265 0.970 0.826 0.811 0.540 0.874 0.811 0.53617.5 0.800 0.545 0.324 0.246 0.969 0.819 0.806 0.527 0.869 0.804 0.51918.0 0.792 0.529 0.307 0.229 0.968 0.812 0.801 0.514 0.864 0.797 0.50418.5 0.784 0.514 0.290 0.214 0.967 0.805 0.796 0.503 0.860 0.790 0.48919.0 0.777 0.500 0.275 0.200 0.966 0.798 0.792 0.492 0.855 0.784 0.47519.5 0.770 0.486 0.261 0.188 0.965 0.792 0.788 0.482 0.851 0.778 0.46320.0 0.763 0.474 0.248 0.176 0.964 0.786 0.784 0.473 0.848 0.772 0.450

K values chart

(1) values appropriate for IEC A, B and C curves only

Other practical method: the chart below gives thevalues of:

as a function of

In the column that corresponds to the type of timedelay, read the value

on the line that corresponds to

The operation time tA for the current IA with the Is andT settings is tA = K.T

ExampleGiven:c type of time delay: very inverse time (VIT)c set point: Isc T time delay = 0.8 s

Question: what is the operation time for the currentIA = 6 Is?

Chart reading: VIT column

line

K = 1.80

Answer: the operation time for the current IA ist = 1.80 x 0.8 = 1.44 s.

I

Is

tsK =

Ts10

tsAK =

Ts10

IA

Is

I= 6

Is

Sepam 1000+58

IDMT protections (cont’d)

Standard inverse time curve SITVery inverse time curve VIT or LTI

I/Is

t (s)

0.10

1.00

10.00

100.00

1 10 100

curve (T = 1s)

standard inverse time SIT

very inverse time VIT or LTI

RI

Extremely inverse time curve EITUltra inverse time curve UIT

t (s)

0.10

1.00

10.00

100.00

1 000.00

1 10

curve (T = 1s)

I/Is

100

extremely inverse time EIT

ultra inverse time UIT

IAC curves

t (s)

10000.00

1000.00

100.00

10.00

1.00

0.101 10 100

I/Is

MI

VI

EI

IEEE curves


t (s)

0.10

1.00

10.00

100.00

1 000.00

1 10

I/Is

100

I

VI

EI

Sepam 1000+ 59

Curve equations

IEC standard inverse type curve

td (I) = xl T

3.17060.339-0.236 I

Is

1( )

( )td (I) = + B x with:A TβI

Is

p

( ) 1

td (I) = A + + + x with:B T

β2( )IIs( )C I

Is( )C

DIIs( )C

E3

characteristic curves k α βIEC standard inverse / A 0.14 0.02 2.97

IEC very inverse / B 13.5 1 1.50

IEC long time inverse / B 120 1 13.33

IEC extremely inverse / C 80 2 0.808

IEC ultra inverse 315.2 2.5 1

characteristic curves A B p βIEEE moderately inverse 0.010 0.023 0.02 0.241

IEEE very inverse 3.922 0.098 2 0.138

IEEE extremely inverse 5.64 0.0243 2 0.081

characteristic curves A B C D E βIAC inverse 0.208 0.863 0.800 -0.418 0.195 0.297

IAC very inverse 0.090 0.795 0.100 -1.288 7.958 0.165

IAC extremely inverse 0.004 0.638 0.620 1.787 0.246 0.092

IEC RI type curve

IEEE curves

td (I) = x with:kI α

Is

Tβ1( )

IAC curves

Time Multiplier Setting TMSThe time delay of IDMT tripping curves (except for the RI curve) may be set:v by T sec (operating time at 10 x Is),v by TMS (setting that corresponds to in the equations above).

The VIT type IEC curve is positioned in same way with TMS = 1 or T = 1,5 sec.

Tβ

t (I) = x TMS with: TMS =13.5IIs 1( )

T1.5

I/Is

ts

T = 1.5 sec

10

IEC curve VIT type

TMS = 1

example:

Holding time T1c definite time:allows the function to be triggered by an intermittent fault,c IDMT:used to emulate a disc type electromagnetic protective relay.

The standardized or estimated values of T1 are available in the SFT 2841 help.

example:

T1 = holding time setting (holding time forI reset = 0 and TMS = 1)T = tripping time delay setting (at 10 Is)β = value of standard tripping curve at 10 Is =

I/Is

tr

T1

0 1

TMS = 1Tβ

t r(I) = x with = TMST1I 2

Is1-( )Tβ

Example:

k

10 -1α

Sepam 1000+60

Each control and monitoring function requiresseparate parameter setting and appropriate wiring.Therefore, not all of the functions are available at thesame time.

e.g. when the logic discrimination function is used,the switching of settings groups function may not beused.

Trip circuit supervision and matchingThis monitoring function is intended for trip circuits:

c Shunt-trip coil circuits.

The function detects:v circuit continuity,v loss of power supply,v position contact discrepancy.

The function inhibits closing ofthe breaking device.Output relay testing

This function is activated via the SFT 2841(1) andcontrols each output relay (2) individually. The relaychanges status for a period of 5 s. This function isespecially useful in the commissioning and faulttracking phases.(1) or via advanced UMI.(2) except for O4 is the output is declared as “watchdog”.

DiscrepancyThis function is used to detect a discrepancy betweenthe last remote control order received and the actualposition of the circuit breaker.

The data may be accessed via the TS42 remoteindication.

Block diagram (1)

Control and monitoring functions

I12

TC2received

TC/positiondiscrepancy

I11T = 1s

&

TC1received

&

≥ 1

c Undervoltage release coil circuits.

The function detects:v position contact discrepancy, inwhich case coil supervision is not necessary.

Block diagram (1)

trip circuitsupervision

I121

0

T = 200 ms

0t

&

I11

&

≥ 1

reset

OPG trig

Triggering according toselected protection functions

SFT 2841

&

TC8

SFT 2841

TC9

SFT 2841

TC10

SFT 2841

TC10manual trig

pick-up

trig inhibit

trig enable

manual trig

≥1

&

≥1

≥1

Disturbance record triggering (OPG)

A

M

O1

542

1

I12

I11

D

+_

5

4

A

M

O1

542

1

I12

I11

D

+_

5

4

(1) With MES optionThe function is activated if inputs I11 and I12 are setrespectively as circuit breaker "open position" and circuitbreaker "closed position".

Sepam 1000+ 61

Circuit breaker /contactor control

UseThis function controls the breaking device:c tripping by:v protections,v remote control,v external protection.c closing by:v recloser,v remote control.c inhibition of closing by:v device control fault,v SF6 pressure drop.

It is coordinated with the recloser function.

resetremote controldisable (I25)

&

acknowledgment (TC5)

≥ 1

“RESET” key

external reset (I14)

In order for operation to take place in accordance with the block diagram,the Sepam 1000+ must have the necessary logic inputs (MES 108 or MES 114module required) and the corresponding parameter setting and wiring must bedone.

The functions that trigger tripping may be latched individually at the time ofparameter setting and reset according to several modes.

O2≥1

0T

T = 200 ms

O10 T

T = 200 ms

trip circuit fault

≥1(TC1) open order

≥1

0 T

T = 200 ms

(I12) device closed

(I12) deviceclosed

≥1

“close” order by recloser

O11

inhibit closing

tripping (shunt /undervoltage)

close order

(I25) pressure drop SF6.1

&

&(I25) remote control disable

TC2 close order

&

≥ 1(I26) pressure drop SF6.2

≥ 1

thermal overload 49 tripping

“open” order by recloser

(I26) inhibition F49

≥ 1(I22) external tripping 2

(I21) external tripping 1

protection functions valided fortripping- overcurrent- ...

.

.

.

&


≥1

&

protection 66:starts per hour

&inhibit start(thermal overload)

(I26) inhibition F49

(2)

(1) data used in the logic block diagram depend on the Sepam type, availability of MES 108, 114 option and general parameters(2) the usual case in which O2 is set to “undervoltage coil” (normaly closed)(3) réalise les fonctions de type B20

Block diagram(1)

S20, T20, M20 types Sepam

B21(3), B22 type Sepam

O2≥1

0T

T = 200 ms

O10 T

T = 200 ms

trip circuit fault

≥1(TC1) open order

≥1

0 T

T = 200 ms

(I12) device closed

(I12) deviceclosed

O11

inhibit closing

tripping (shunt /undervoltage)

close order

(I25) pressure drop SF6.1

&&

(I25) remote control disable

TC2 close order

&

≥ 1(I26) pressure drop SF6.2

≥ 1(I22) external tripping 2



&

(2)

Sepam 1000+62

Control and monitoring functions (cont’d)

Logic discrimination

UseThis function is used to obtain:c full tripping discrimination,c a substantial reduction in delayed tripping of thecircuit breakers located nearest to the source(drawback of the classical time-based discriminationfunction).

The system applies to the definite time (DT) andIDMT (standard inverse time SIT, very inverse timeVIT, extremely inverse time EIT and ultra inverse timeUIT) phase overcurrent and earth fault protections.

With this type of system, the time delays should be set with respect to the elementto be protected without considering the discrimination aspect.

Operating principle

(*) Motor Sepams do not involve the receipt of blocking input orders since they are intendedfor loads only.(1) parameter setting by default.(2) according to parameter setting and presence of an additional MES 108 or 114 module.

td : X+0.6s

td : X+0.3s

td : Xs

td : X+0.9s

e.g. radial distribution with use of time-based discrimination(td: tripping time, definite time curves).

td : Xs

td : Xs

order BI

td : Xs

td : XsMERLIN GERIN

MERLIN GERIN

MERLIN GERIN

MERLIN GERIN

e.g. radial distribution with use of the Sepam logicdiscrimination system.

BI transmission

O3 outputsother level“n” Sepams

O3

O3

I13

I13

BI receipt

+

level “n+1”Sepam

level “n”Sepam

-

When a fault occurs in a radial network, the fault current flows through the circuitbetween the source and the location of the fault:c the protection devices upstream from the fault are triggered,c the protection devices downstream from the fault are not triggered,c only the first protection device upstream from the fault should trip.

Each Sepam is capable of transmitting and receiving blocking input orders exceptfor motor* Sepams which can only transmit blocking input orders.When a Sepam is triggered by a fault current:c it transmits a blocking input order from output O3 (1),c it trips the associated circuit breaker if it does not receive a blocking input orderon input I13 (2).

Transmission of the blocking input lasts for the time required to clear the fault. It isinterrupted after a time delay that takes into account the breaking device operationtime and the protection reset time.

This system makes it possible to minimize the duration of the fault, optimizediscrimination and guarantee safety in downgraded situations (wiring or switchgearfailures).

Sepam 1000+ 63

Block diagram: substation – transformer applications

≥1

inst. relay 2 (group A)


earth fault



overcurrent

≥1

time-delayed relay 2 (group B)


earth fault



overcurrent

0T

T = 0.2 s

&

inhibition of BItransmission

tripping

output Oxx : BI transmission

to BI transmission

(1)

(2)

(2)

Block diagram: motor applications

(1) according to parameter setting (O3 by default).(2) Instantaneous trip correspond to pick-up information

Pilot wire testingThe pilot wire may be tested using the output relay testing function.

≥1 to BI transmissioninst relay 2 (group A)inst relay 1 (group A)

inst relay 1 (group A)inst relay 2 (group A)

overcurrent

earth fault

≥1time-delayed relay 2 (group B)time-delayed relay 1 (group B)

earth fault (time)time-delayed relay 1 (group B)time-delayed relay 2 (group B)

overcurrent (time)

≥1time-delayed relay 2 (group A)time-delayed relay 1 (group A)

earth fault (logic discrim)time-delayed relay 1 (group A)time-delayed relay 2 (group A)

overcurrent (logic discrim)

&

≥1

0T

T = 0,2 s

&

inhibition of BI transmissionif fault is not cleared

tripping (01)

time delay settingsfor time-baseddiscrimination

time delay settingsfor logicdiscrimination

output Oxx : BI transmission

log. Input I13: AL receipt

BI transmissionBI receipt

(1)

(2)

(2)

Sepam 1000+64

Protection settingsThe Sepam 1000+ can be set:c via the front panel when Sepam 1000+ is equippedwith the advanced UMI function. Function keys (blue)may be used to navigate in the menu and to scrolland accept the displayed values.Main functions performed:v changing of passwords,v entry of general parameters,v entry of protection settings.c via a PC equipped with the SFT 2841 softwarepackage connected to the front panel for all types ofSepam 1000+.

Menus guide the user through the different phases ofparameter and protection setting by a series ofwindows suited to each operation.

The SFT 2841 software package may be used forSepam 1000+ parameter and protection setting inconnected or unconnected mode. The unconnectedmode allows all the parameter settings to be preparedahead of time and loaded in a single operation whenthe Sepam 1000+ is connected on site (downloading).Main functions performed by the SFT2841:c changing of passwords,c entry of general parameters (ratings, integrationperiod, …),c entry of protection settings,c changing of program logic assignments,c enabling/disabling of functions,c saving of files.

reset

I onextIo >> 51NIo > 51NI> > 51I>51on 0 off

clear

I1 = 162AI2 = 161AI3 = 163A

Trip

Parameter and protection settings

Example of advanced UMI with standard assignment of indicators.

Example of phase overcurrent protection setting screen.

Example of parameter setting.

Program logic parametersettingProgram logic parameter setting consists mainly ofassigning the data from the protection function to thesignal lamps and output relays. The parameter settingmay be done by filling in the "control matrix" in theSFT 2841 software package.

Sepam 1000+ 65

Program logicEach Sepam 1000+ has program logic by defaultaccording to type (S20, T20,…) as well as messagesfor the different signal lamps.

The functions are assigned according to the mostfrequent use of the unit. This parameter setting maybe customized if required using the SFT 2841software package.

OutputO1 - trippingO2 - inhibit closingO3 - BI transmissionO4 - watchdogO11 - close orderO12 - phase fault indicationO13 - earth fault indicationO14 - permanent fault

Signal lampsL1 - I > 51L2 - I >> 51L3 - Io > 51NL4 - Io >> 51NL5 - extL6 -L7 - offL8 - onL9 - Trip

(1) or CB withdrawned position.(2) in service.

Example: Sepam S20 equipped with optionnal module MES 114

ES (2) output signal lamps associatedfunctions

functions O1 O2 O3 O4 O11 O12 O13 O14 L1 L2 L3 L4 L5 L6 L7 L8 L9

phase protection 50/51-1 c c c c c c breaker(latching) 50/51-2 c c c c c c control

earth fault 50N/51N-1 c c c c c c50N/51N-2 c c c c c c

unbalance 46 c c c cprotection

recloser 79 c copen position I11 c c trip circuit

closed position I12 c c supervision

blocking input I13 c logicreceipt selectivity

line switch I14 copen (1)

tripping by I21 c cexternal protection

I22

I23

I24

inhibit remote I25 c remotecontrol control

SF6 I26 c cpressure drop

blocking c c logicinput transmission selectivity

“pick-up” signal c disturbancerecordingtriggering

watchdog c c

protection

Sepam 1000+66

Default parameter setting

The Sepam units are delivered with default parametersetting and protection setting according to the type ofapplication. These “factory” settings are also usedwith the SFT 2841 software:c for the creation of new files in disconnected mode,c for a return to the “factory” settings in connectedmode.

S20, T20 and M20 applications

Hardware configurationc Identification: Sepam xxxxc Model: UXc MES module: absentc MET module: absentc MSA module: absentc DSM module: presentc ACE module: absent

Output parameter settingc Outputs used: O1 to O4c Shunt coils: O1, O3c Undervoltage coils: O2, O4c Impulse mode: no (latched)

Program logicc Circuit breaker control: noc Logic discrimination: noc Use of logic inputs: not used

General characteristicsc Network frequency: 50 Hzc Setting group: Ac Enable remote setting: noc Working language: Englishc CT rating: 5 Ac Number of CTs: 3 (I1, I2, I3)c Rated current In: 630 Ac Base current Ib: 630 Ac Integration period: 5 minc Residual current: 3I sumc Pre-trig for disturbance recording: 36 periods

Protectionsc All the protections are “off”.c The settings comprise values and choices that are informative and consistentwith the general characteristics by default (in particular rated current In).c Tripping behaviorv latching: yes,v activation of output O1: yes,v disturbance recording triggering: with.

Command matrixc S20 application:v activation of output O2 upon protection tripping,v activation of indicators according to front panel markings,v watchdog on output O4,v disturbance recording triggering upon signal pick-up.

c Complements for T20 application:v activation of O1 without latching upon tripping of temperature monitoring 1 to 7,v activation of O1 and indicator L9 without latching upon thermal overload tripping.

c Complements for M20 application:v activation of outputs O1 and O2 and indicator L9 upon tripping of functions 37(phase U/C) and 51 LR (locked rotor),v activation of output O2 upon tripping of function 66 (number of starts),v latching for function 51 LR.

Sepam 1000+ 67

functions output indicatorsB21 B22 O1 O2 O3 O4 L1 L2 L3 L4 L5 L6 L7 L8 L9

27D-1 27D-1 c c27D-2 27D-2 c c c27R 27R c c27-1 27-1 c c27-2 27-2 c c c27S-1 27S-1 c c c27S-2 27S-2 c c c27S-3 27S-3 c c c59-1 59-1 c c59-2 59-2 c c c59N-1 59N-1 c c59N-2 59N-2 c c c81H 81H c c c81L-1 81L-1 c c81L-2 81L-2 c c c

81R c c c

B21(1), B22 applications

Hardware configurationc Identification: Sepam xxxxc Model: UXc MES module: absentc MET module: absentc MSA module: absentc DSM module: presentc ACE module: absent

Output parameter settingc Outputs used: O1 to O4c Shunt coils: O1 to O3c Undervoltage coils: O4c Impulse mode: no (latched)

Program logicc Circuit breaker control: noc Assignment of logic inputs: not useds

General characteristicsc Network frequency: 50 Hzc Enable remote setting: noc Working language: Englishc Primary rated voltage (Unp): 20 kVc Secondary rated voltage (Uns): 100 Vc Voltages measured by VTs: V1, V2, V3c Residual voltage: 3V sumc Pre-trig for disturbance recording: 36 periods

Protectionsc All the protections are “off”c The settings comprise values and choices that are informative and consistentwith the general characteristics by defaultc Latching: noc Disturbance recording triggering: with

Command matrixc Assignment of output relays and indicators according to chart:

(1) Type B21 performs the same functions as cancelled typeB20.

c Disturbance recording triggering upon signal pick up.c Watchdog on output O4.

Indicator markingL1: U < 27L2: U < 27DL3: U < 27RL4: U > 59L5: U > 59NL6: F > 81HL7: F < 81LL8: F << 81LL9: Trip

Sepam 1000+68

Characteristics

Size and weightSepam 1000+ base unit

“Terminal block” mounting with AMT840 plateUsed to mount the Sepam at the back of thecompartment with access to the connectors on therear panel.

Mounting associated with the use of the remoteadvanced UMI (DSM303).

Mounting shown with advanced UMIand optional MES 114 module.Weight = approx. 1.2 kg without option.Weight = approx. 1.7 kg with option.

98

198222

31

mounting latch

202 ±0.2

162 ±0.2

160176

Front panel flush-mounting

Top view Side view Cutout

Mounting sheet thickness < 3 mm.

216

230

236

15

40

40

40

40

40

176

98123

6,5

Sepam 1000+ 69

Cutout dimensions for flush-mounting(mounting plate thickness < 3 mm).

Weight: 0.2 kg

ACE 959 communication interface module

SF6

117

162

25

ext

Io>>51N

Io>51N

I>>51

I>51

on

T

reset

clear

0 offI on

DSM 303 module

Weight approx. 0.3 kgThe depth with the connection cord is less than 30 mm(lateral output).

98.5 ±0.5

144 ±0.2

DSM 303 module cutout

88

30

144

(1)

ACE 949-2 communicationinterface module

(1) depth with CCA77x connection cord: 70 mm.

88

7230 (1)

MET 148 module

88

30

144

(1)

MSA 141 module

Weight: 0.2 kg

Weight: 0.25 kg

Weight: 0.1 kg

88

144

30(1)

Sepam 1000+70

Characteristics (cont’d)

CSH 120, CSH 200core balance CTsThe specially designed CSH 120 and CSH 200 corebalance CTs are used for direct residual currentmeasurement. The only difference between themis their diameter and they can both operate with2 selected ratings:c 2 A rating:set points from 0.2 A to 30 A,c 20 A rating:set points from 2 A to 300 A.

Characteristics:c dinner diameter:v CSH 120: dia. 120 mmv CSH 200: dia. 200 mmc accuracy: +5% at 20°Cc transformer ratio: 1/470c maximum permissible current: 20 kA-1sc operating temperature: -25°C to +70°Cc storage temperature: -40°C to +85°Cc drift in accuracy related to temperature: +1%c the wiring resistance should be < 10 Ω.

Dimensions

Mounted directly oncable.

Mounted on plate or rail.

dimensions (mm)

A B D E F H J K L

CSH 120

120 164 44 190 76 40 166 62 35

CSH 200

200 256 46 274 120 60 257 104 37

weight CSH 120 0.6 kg

CSH 200 1.4 kg

Horizontal CSH 30 mounting Vertical CSH 30 mounting

CSH 30 interposing ring CTThe CSH 30 interposing ring CT is used when theresidual current is measured using 1 A or 5 A currenttransformers.It should be installed near the Sepam input(max. distance 2 m).

2 ø 4.5

82

60

8

50

5

ø 30

2 ø 4.5

29

4

16

Dimensions

weight : 0.12 kg

D

K B

L

4 horizontalmounting holes dia. 5

ø AF H

J

E

4 verticalmounting holes dia. 5

Sepam 1000+ 71

analog inputs

current transformer (1) input impedance < 0,001 Ω1 A or 5 A CT (with CCA 630) consumption < 0.01 VA to 1 A1 A to 6250 A ratings < 0.025 VA to 5 A

steady state thermal resistance 3 In

1 second overload 100 In

voltage transformer input voltage 100 to 120 V imp > 100 kΩ220 V to 250 kV ratings steady state thermal resistance 230 V

1 second overload 480 V

input for RTD (2)

type of RTD Pt 100 Ni 100 / 120

isolation from earth no no

current injected in the RTD 4 mA 4 mA

logic inputs

voltage (2) 24 to 250 Vdc -20/+10% (from 19.2 to 275 Vdc)

consumption 3 mA typical

logic outputs (O1, O2, O11 contacts) (2)

voltage DC 24 / 48 Vdc 127 Vdc 220 Vdc

AC (47.5 to 63 Hz) 100 to 240 Vac

continuous rating 8 A 8 A 8 A 8 A

breaking resistive load 8 / 4 A 0.7 A 0.3 Acapacity L/R load < 20 ms 6 / 2 A 0.5 A 0.2 A

L/R load < 40 ms 4 / 1 A 0.2 A 0.1 A

resistive load - 8 A

load p.f. > 0.3 - 5 A

making capacity < 15 A for 200 ms

logic outputs (O3, O4, O12, O13, O14 contacts) (2)

voltage DC 24 / 48 Vdc 127 Vdc 220 Vdc

AC (47.5 to 63 Hz) 100 to 240 Vac

continuous rating 2 A 2 A 2 A

breaking L/R load < 20 ms 2 / 1 A 0.5 A 0.15 Acapacity load p.f. > 0.3 - 1 A

power supply (2)

range deactivated cons. (3) max. cons. (3) inrush current

24 Vdc -20% +50 % (19.2 to 36 Vdc) 3 to 6 W 7 to 11 W < 10 A for 10 ms

48 / 250 Vdc -20% +10 % 2 to 4.5 W 6 to 8 W < 10 A for 10 ms

110 / 240 Vac -20% +10 % 3 to 9 VA 9 to 15 VA < 15 A for47.5 to 63 Hz first half-period

cancellation of transients 10 ms or 1/2 period

analog output

current 4 - 20 mA, 0 - 20 mA, 0 - 10 mA

load impedance < 600 Ω (wiring included) (2)

accuracy 0.5%

(1) wiring: maximum core cross-section ≤ 6 mm2 (≥ AWG 10) and ring lug terminal ø 4 mm.(2) connection to screw terminal: 1 wire with max. cross-section 0.2 to 2.5 mm2 (≥ AWG 24-12) or 2 wires with max. cross-section 0.2 to 1 mm2 (≥ AWG 24-16),option: connection to 6.35 mm ring lug terminal for outputs O1,O2, O3, O4, power supply and CSH core balance CT.(3) according to configuration.

Electrical characteristics

Sepam 1000+72

Environmental characteristicsisolation

dielectric withstand at power frequency IEC 60255-5 2 kVrms – 1 mn (1)

1.2/50 µs impulse wave IEC 60255-5 5 kV (2)

electromagnetic compatibility

fast transient bursts IEC 60255-22-4 class IVIEC 61000-4-4 level IV

1 MHZ damped oscillating wave IEC 60255-22-1 class III

immunity to radiated fields IEC 60255-22-3 class X 30 V/mIEC 61000-4-3 level III 10 V/m

immunity to conducted RF disturbances IEC 61000-4-6 level III 10 V

electrostatic discharge IEC 60255-22-2 class III 6 kV / 8 kV (contact / air)IEC 61000-4-2 level III

conducted disturbance emission EN 55022 / CISPR 22 class B on aux. supply (3)

disturbing field emission EN 55022 / CISPR 22 class A (4)

mechanical robustness

degree of protection IEC 60529 IP 52 on front panelother sides closed(except for rear IP20)

vibrations IEC 60255-21-1 class II

shocks / jolts IEC 60255-21-2 class II

earthquakes IEC 60255-21-3 class II

fire resistance IEC 60695-2-1 glow wire 630°Cclimatic withstand

operation IEC 60068-1 and 2 -25°C to +70°Cstorage IEC 60068-1 and 2 -25°C to +70°Cdamp heat IEC 60068-2-3 93% RH at 40°C,

56 days (storage)10 days (operation)

effect of corrosion IEC-68054-4 class I

(1) except for communication 1 kVrms.(2) except for communication 3 kV common mode, 1 kV differential mode.(3) generic EN 50081-1 standard.(4) generic EN 50081-2 standard.

Characteristics (cont’d)

Type de Sepam

type Integrated ring lugadvanced UMI(4) connector

substation ..................... S20 .... ........................................... ..................

transformer ................... T20 .... ........................................... ..................

motor ............................. M20 ... ........................................... ..................

busbar ........................... B21 .... ........................................... ..................

busbar ........................... B22 .... ........................................... ..................

working language .......................... English / French .............................................

....................................................... English / Spanish ...........................................

....................................................... English / Italian ...............................................

....................................................... English / Swedish ...........................................

....................................................... English / Polish ...............................................

auxiliary power supply ................... 24 Vdc ............................................................

....................................................... 48 to 250 Vdc or 100 to 240 Vda ...................

Sepam 1000+ quantity

Separate modulesand optional accessories quantity

Ordering information

When ordering, please enclose a photocopyof this page with your order, filling in the requestedquantities in the spaces providedand ticking off the boxes to indicate your choices .

residual current sensors .................................... CSH 120 ...........................

........................................................................... CSH 200 ...........................

interposing ring CTfor residual current input ................................... CSH 30 .............................

core balance CT interface ................................. ACE 990 ...........................

4 input + 4 output module ................................. MES 108 ..........................

10 input + 4 output module ............................... MES 114 ...........................

8 temperature sensor module ........................... MET 148 ...........................

analog output module ........................................ MSA 141 ...........................

remote advanced UMI module (1) ...................................... DSM 303 ..........................

mounting plate ................................................... AMT 840 ...........................

2-wire RS485 network interface (2) .................................. ACE 949-2 ........................

4-wire RS485 network interface (2) .................... ACE 959 ...........................

remote module connection cable L = 0.6 m ...... CCA 770 ...........................

remote module connection cable L = 2 m ......... CCA 772 ...........................

remote module connection cable L = 4 m ......... CCA 774 ...........................

PC parameter setting and operationsoftware kit (3)

.......................................................................................... SFT 2841..........................

RS485 / RS232 converter ................................. ACE 909-2 ........................

RS485 / RS485 interface .................................. ACE 919 CA .....................

RS485 / RS485 interface .................................. ACE 919 CC.....................

use and commissioningmanual ........................................... French .................................................

....................................................... English .................................................Notes:(1) not compatible with Sepam units equipped with integrated advanced UMI(2) including the CCA612 connection cord(3) kit including the CCA783 connection cord and SFT 2826 software(4) S10 UD model

PCRED399039EN /3ART.28274

This document has beenprinted on ecological paper.

Schneider Electric Industries SA

Postal addressF-38050 Grenoble cedex 9Tel : 33 (0)4 76 57 60 60Telex : merge 320842 Fhttp://www.schneider-electric.com

As standards, specifications and designs change fromtime to time, please ask for confirmation of the informationgiven in this publication.

Publishing: Schneider Electric Industries SADesign, production: Idra, HeadLinesPrinting:

09 / 2000

Rcs Nanterre B 954 503 439

Protection & Control Sepam 1000 PCRED399039EN

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