Motor and Over Current Protection Device 226

P226C Motor and Overcurrent

Protection Device

Version P226C - H1x - Z – V2x ff

Technical Data Sheet

This Document does not replace the Technical Manual

Application The MiCOM P226C combined motor and overcurrent relay in compact housing can be used for overload and short-circuit protection of motors, transformers, line and cables.

The motor protection features of the relay are segregated into two areas, general motor protection and specific motor protection, and allow the relay to be configured for a variety of different applications.

The general motor protection is suitable for motors that are started direct-on-line or using soft-start techniques. Individual functions are totally independent of each other and enable the user to optimise the protection for individual cases in the vast field of motor applications.

The specific motor protection has been specifically designed for directly switched HV induction motors with thermally critical rotors. The links between the individual functions enable them to be combined in an overall "specific motor protection" function. All motor protection facilities recognise the operating mode of the motor for optimum control.

In addition to the general and specific protection functions, overcurrent, unbalance and loss of load facilities, the MiCOM P226C has a large number of additional functions for the optimum protection of motors or other devices. Operational safety can be increased using the functions available for monitoring the measurement circuits, trip circuit and circuit breaker. The forecast functions of the thermal replica, recording of the motor start profile and measurement facilities all provide tools for optimising system management.

Functional Overview

P226C

50/51 Short circuit protection x 50N/51N Earth fault protection x 46 Unbalance protection x 49 Thermal overload protection x 66 Number of starts limitation x 50S/51LR Locked rotor protection x 48/51 Excessive long start monitoring x Minimum time between 2 starts x 48/49/49LR/50S/66 Specific motor protection x 37 Loss of load protection x 27LV Reacceleration authorisation x 27 Undervoltage protection x 59 Overvoltage protection x Busbar voltage detection x Emergency start-up x 50BF Breaker failure protection x 86 Latching of output relay x Programmable logic (4 equations) x CB supervision x Trip circuit supervision x Setting groups 2 Measurements x Power and energy measurements x Event records 75 Fault records 5 Motor start-up record x Disturbance records 8 Communication interface (RS485 or optical fibre) option Protocol for communication interface: IEC60870-5-103 or Modus RTU x Function keys 4 Binary inputs 2 (opt. 7) Output relays 8

Figure 1: Functional Overview

P226C TechnicalDataSheet EN 02 a 2 P226C H1x - Z - V2x ff

Functions that are not required for a given application can be easily deactivated and become invisible to the user.This concept permits an extensive scope of functions within a single, universally applicable design whilst maintaining a clear and concise configuration to the particular application.

Protection functions General Motor Protection The general motor protection detects whether the motor is either switched off or running by moni-toring the position of the circuit breaker, with an additional configurable current check to indicate the starting condition.

The following independent protection elements are provided within the general motor protection:

> Thermal overload

> Number of starts limitation

> Locked rotor

> Excessive long start

> Minimum time between 2 starts

Thermal Overload Protection This element of the general motor protection, protects the rotor and stator windings against thermal overloads. To optimise the thermal replica, two heating time constants are available for normal running and starting conditions, as well as a cooling constant for when the motor has been switched off.

I

50/51 50N/51N 37 4946 50S 48/5

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VCA

27 59 27LV

51LR

to SCADA / substation control

via RS485 or Fibre Optics

using IEC 60870-5-103 or Modbus,

CommunicationinterfacePC-Interface

to Setting-program S1

Communication

Figure 2 : Function diagram

P226C TechnicalDataSheet EN 02 a 3

Thermal constant times :- overload condition: Te1 = 12 minutes

- startup condition: Te2 = 6 minutes

Cold curveThermal status

= 0 %

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g tim

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ds)

Hot curveThermal status = 90 %

Thermal equivalent current Ieq in terms of the current thermal threshold I>

Figure 3: Thermal overload protection characteristic curve

Motor/ Overcurrent Protection P226C

86

allwaysavailable Option

1 50BF

ditional Functions

closing Blocking duringartupsbar voltage detectionogrammable Logictting Groupscking logiccuit breaker supervisionp circuit supervisionasuring circuit monitoringlf monitoringnction keys

Measurements

Phase and residual currentsDirect and invers currentsVoltage VCAThermal ReplicaNumber of StartsStartup Current/TimePower and EnergyPower factorFrequency...

37/48/49/50S/6666

Recordings

Starting rec.

Fault rec.

Disturbance rec.

Event rec.

P226C H1x - Z - V2x ff

In order to take into account the additional heating effects caused by unbalance, a weighted negative sequence current component can be added to the maximum true rms phase current in the thermal model. Two stages of protection are provided; a trip level that occurs when the thermal replica reaches 100% and a user configurable alarm level. An additional element is also provided to prevent restarting of the motor until the thermal replica is below a configurable threshold.

The flexible settings of the thermal overload protection also make it suitable for cable and transformer applications.

Number of Starts Limitation The number of motor starts can be restricted within a time limit configurable by the user.The relay can distinguish between hot and cold starts thereby optimising the number of starts within a given period of time. Once the maximum number of motor starts within the time permitted has been reached, further starts are disabled until a configurable time period has elapsed.

Locked Rotor Protection During motor starting, a locked rotor can be detected using an external speed switch in conjunction with a configurable time delay on the relay.

Detection of a locked rotor when the motor is running is by use of a phase overcurrent stage with a separate time delay.

Excessive Long Start Monitoring This function is used to monitor the duration of the motor starting condition, regardless of the motor loading. The choice of the motor starting detection criteria makes it possible to use this function whatever the motor’s starting mode e.g. direct-on-line, star-delta, auto-transformer, resistor insertion, etc..

Minimum Time between 2 Starts Setting a minimum delay between successive starts avoids exposing the motor and its starting system to excessive stresses and overheating.

Specific Motor Protection For applications involving directly switched HV induction motors with thermally critical rotors, a separate set of “specific motor protection” functions have been made available. These functions monitor the current magnitude to establish the operating mode of the motor:

> Motor stopped

> Motor running

> Overload range

> Motor start-up

A special overload memory is used in specific motor protection that replicates the temperature rise of the motor to be protected in relation to the temperature of the cooling medium in a range of values between 0 and 100%. The memory values 0%, 20%, 40%, 60% and 100% are of particular significance because they indicate a cold motor, the minimum state of the memory after one, two or three consecutive starts and the trip threshold. The heat transfer of the copper in the rotor core of the induction motor after starting is referenced to one of these minimum values by a linear discharge of the memory with a configurable rate. However, a running motor is always considered to be at operating temperature and therefore has a minimum value of 20% of the memory.

Overloadmemory

Start-up counter Reclosing block

Three consecutive startups

Figure 4: Overload memory and start-up counter


When adjusting the overload memory, a distinction is made between heating, heat dispersion and cooling with separate cooling constants being used for rotating or stationary motors.

Either the reciprocally quadratic or logarithmic tripping characteristic can be selected for heating.

Separate cooling times are used for cooling rotating and stopped motors respectively.

The number of hot and cold starts can be specified such that once the maximum number of starts has been reached, any restart is prevented until the overload memory falls below a configurable value.

The specific motor protection has special scheme logic to prevent the thermal overload from causing a trip during starting of motors with high inertia loads. A speed switch is used to monitor the motor whilst it is running to detect the locked rotor condition.

Additional Protection & Monitoring Functions Short Circuit Protection [Phase] Short-circuit protection for phase faults is provided by three definite-time stages with each stage providing phase-selective starting.

Earth Fault Protection Short-circuit protection for earth faults is provided by two definite-time stages with either a standard or sensitive version available (order option). The effect of the earth fault stages on the general start signal can be suppressed if required, which will also suppress operation of the trip command generated by the earth fault element.

Unbalance Protection Unbalance protection is provided by calculating the negative sequence component of the current waveform. Two negative sequence overcurrent stages are provided one with definite time delay and the other with an inverse time delay, to differentiate between a temporary unbalance and other phenomena such as phase failure.

P226C TechnicalDataSheet EN 02 a 5

Figure 5: Negative sequence current with time-dependent characteristic curve

Loss of Load Loss of load, caused for example by shaft rupture or the unpriming of a pump, can be detected by the definite time undercurrent element. This function can be deactivated during starting so that the motor can gradually increase its loading.


Undervoltage Protection Undervoltage protection on the P226C is provided by a definite-time, phase-phase voltage element.This element is automatically disabled when the motor is stopped and can be selectively disabled during motor starting.

Overvoltage Protection Overvoltage protection on the P226C is provided by a definite-time, phase-phase voltage element.

Reacceleration Authorisation Any system voltage depression will lead to a reduction in the motor speed and on restoration of the supply, the motor will reaccelerate to nominal speed by drawing currents similar in magnitude to the normal starting current. A separate voltage element is available for detection of the voltage dip and subsequent restoration. Depending on the duration of the voltage dip, the relay can authorise a reacceleration on voltage restoration, or stop the motor to allow other process critical motors to reaccelerate.

Anti-backspin Protection When a motor with a high inertia load is stopped, the shaft continues to rotate for some time before coming to a complete stop.Restarting the motor whilst the shaft is rotating, like connecting to a non-synchronous network, risks mechanical damage.Setting a minimum time delay between switching off the motor and restarting it can eliminate the risk of such problems.

Busbar Voltage Detection A minimum voltage must be present in order for the motor to start successfully. This function monitors the busbar voltage when the motor is switched off and if the voltage falls below the set minimum value, a blocking command is issued to prevent motor starting.

Emergency Restart A logic input signal is available for emergency restart or to block the thermal replica, which may be required for safety or process requirements.The input signal deactivates all signals that could prevent starting and prevents the motor from being stopped by a protection function during starting.

Latching of the output relays All freely configurable output relays can be set to a latched operating mode. In addition, individual trip functions can be separately latched for the trip output relay.

Circuit Breaker Failure Protection When the trip command is sent, the breaker fail timer is started during which the amplitude of the three phase currents are monitored to see if they fall below a configurable threshold. If, at the end of the time delay, all three phase currents have not fallen below the threshold, a signal is issued to indicate that the circuit breaker has failed to clear the fault.

When a circuit breaker failure signal is received at an appropriately configured logic input, an instantaneous trip signal can be generated.

Trip Circuit Supervision The monitoring function detects interruptions in the trip circuit, regardless of whether the circuit breaker is in the open or closed state, thereby increasing operational safety.

Dynamic Parameter Selection During dynamic parameter selection, the overcurrent and unbalance protection current thresholds and the thermal overload protection trip threshold can be increased for a configurable period of time. This function can be used to avoid unwanted trips caused by short-term increases in load, for example when connecting a motor or transformer.


Programmable Logic The relay has 4 “AND” logic gates for linking internal and external signals, with each gate having its own timer selectable to either delay on pick-up or drop-off.The user can also generate “OR” logic operation by individually programming each output relay.

Setting Group Selection The protection settings can be stored in two independent groups for adaptation to various operating or system management conditions. Depending upon the mode selected, switching between the two setting groups is possible via operator control or via logic input. The following functions are included in the setting groups:

> Short circuit and earth fault protection

> Unbalance protection

> Under/over voltage protection

> Loss of load protection

> Thermal overload protection 2)

> Number of starts limitation 2)

> Locked rotor protection 2)

> Excessive long start monitoring 2)

> Specific motor protection 1)

Circuit Breaker Supervision Preventative CB maintenance is provided by monitoring the summated contact breaking duty, the number of trip operations and the operating time. If the configurable thresholds for any of these are exceeded, the relay will generate an alarm signal.

Measuring Circuit Supervision The P226C includes facilities for monitoring the phase currents and the phase-phase voltage. Phase current monitoring is based on the principle of a maximum permissible magnitude of unbalance.

It is possible to configure the function to monitor the phase currents on a two phase CT connection.

Phase-phase voltage monitoring is based upon a plausibility check with the phase currents. If a low current threshold is exceeded by at least one phase, the phase-phase voltage is monitored for a set minimum level. Additionally, a logic input is available to indicate an MCB trip on the VT secondary circuit.

Measurement & Recording Facilities Operating and Process data acquisition The MiCOM P226C relay constantly measures a large amount of electrical data, including:

> Phase current magnitude in true rms (up to 10th harmonic on 50Hz): IA, IB, IC

> Residual current magnitude in true rms: IN

> Phase-phase voltage magnitude in true rms: VCA

> Positive sequence current: I1

> Negative sequence current: I2

> System frequency

> Active and reactive power: W, VAr

> Active and reactive energies: Wh, Varh

To provide the user with more accurate information on the motor status and availability, the P226C also monitors:

> Thermal status of the motor

> Load value as a % of full load thermal value

> Time to thermal trip

> Last start current magnitude

> Duration of last starting period

> Number of additional starts permitted

> Time left till next start is permitted

The operating and process data is available on the local control panel, via the PC interface and via the optional communication interface.

Motor Start-up Record The P226C records the starting current and voltage waveforms of the last motor start by taking one true rms sample for every 5 power system cycle. The recorded data can be read via the PC or optional communication interfaces, and is particularly useful during commissioning stages to visualise the start profile.

Trip Statistics The MiCOM P226C relay provides trip statistics for every protection function enabling the user to keep track of the number of trips that have taken place and their origin. The number of general startings is also recorded.

1) Specific motor protection selected 2) General motor protection selected


Event Records The last 75 events are stored in a non-volatile memory with a resolution of 1ms. Data recorded includes the state change of binary inputs and outputs, alarm signals and any setting changes.

Fault Records The P226C logs the last 5 faults that generated a trip with each log containing the following information:The fault number

> Date and time

> Active setting group

> The function causing the trip

> Numerical fault data

Disturbance Records The internal disturbance recorder records the sampled values of the analogue variables and relevant alarm signals. A total of 8 records each lasting up to 2.5 seconds can be stored and read via the PC or optional communication interface.

Diagnostics Comprehensive self-monitoring procedures with the relay ensure that internal hardware or software errors are detected and do not cause the device to malfunction. As the auxiliary voltage is applied, a functional test is performed followed by continuous self-monitoring during relay operation. If test results deviate from the default value, a corresponding signal is stored into the non-volatile monitoring signal memory. The result of the fault diagnosis determines whether the relay is disabled or if a warning only is given.

Mechanical Design The P226C consists of an aluminium case with reversible connector blocks and adjustable side brackets and can be used for wall surface or panel flush mounting. In either case the unit is connected using screw terminals. The processor module carrying the local control panel is mounted directly on the rear of the removable front panel and is connected to the combined I/O (input/output) module by a ribbon cable. The I/O module contains the power supply, input transformers, output relays and the optic couplers used for the logic inputs. The front panel contains the keyboard for the local control panel as well as windows for the display and label strips. Figure 7 on page 17 shows the case and mounting dimensions.


Local Control Panel All data required for the operation of the unit is entered via the integral local control panel, which also displays essential system management data. The following tasks can be handled via the local control panel:

> Viewing and modification of settings > Viewing of operating data and state signals > Viewing of fault records and alarm signals > Resetting of trip/alarm conditions > Control functions for test and commissioning

purposes The local control panel shown in Figure 6 comprises the control elements and functions described below.

User Interface (1) The integrated local control panel has

a 2x16 alphanumeric character LCD display. For the indication of different information a total of 8 LEDs are available.

(2) Four fixed function LEDs

(3) Four user programmable LEDs that can be labelled by the user using the labelling fields.

Menu Tree (4) By use of the Navigation keys and

LCD display, a plain text menu containing settings, measurements, alarms and control functions can be accessed. Any changes to the settings can be made and confirmed via the Enter key , which is also used to activate control functions. If a mistake is made during the setting procedure, pressing the Clear key C will exit the setting mode and clear the entry. Pressing this key at any other time resets the LEDs and alarm. Within the alarm display, pressing the Read key G resets the selected message.

Function Keys

1

4

7

6

P226C

(5) Four function keys are available for use on the P122C relay. Function keys F1 or F2 automatically access the operating data or fault records respectively.Function keys F3 and F4 are user configurable and can be integrated into trip command or can be configured to an output relay to facilitate easy control access e.g. manual operation of the circuit breaker.

Device Type designation and PC Interface (6) Details of the device type designation, serial

number, order number and electrical characteristics are all located on the upper part of the relay.

(7) Serial interface for connection to a PC.

Password Protection Password protection is provided on the relay to prevent unauthorised setting changes and use of function keys F3 and F4.

P

Alarm Display Any system fault or condition that deviates fromnormal operation will activate an alarm on the LCD display. Any problem detected by the relay diagnostics will generate a second alarm that takes priority over any other alarm. The individual events that activated the alarms are listed in chronological order and can be selected by pressing the Read key .

226C TechnicalDataSheet EN 02 a 9

2

5

3

Figure 6: Local Control Panel


Technical Data General Data Design Housing suitable for wall mounting or panel mounting Installation position Vertical ±30° Degree of protection IP 51 in accordance with EN 60529/IEC 529 Weight approx. 4 kg Dimensions See "Dimension Drawing" Terminal connection diagrams See "Connections" Terminals PC interface (X6) RS 232/DIN 41652 connector (X6), type D-Sub, 9-pin. Communication interface Optical plastic fibers (X7 and X8):

F-SMA-interface per IEC 874-2 or DIN 47258 per plastic fibers or BFOC-(ST®)-interface 2.5 per IEC 874-10 or DIN 47254-1 per glass fiber

or Leads (X9): Threaded terminal ends M2 for wire cross-sections up to 1.5 mm2

Optional binary inputs M2.5 screw terminals for wire cross sections up to 2.5 mm2

Other inputs and outputs Threaded terminals for pin-terminal connection: Threaded terminal ends M4, self-centering with wire protection for conductor cross sections of 0.2 to 6 mm2

or 2 x 2.5 mm2

Creepage distances and clearances In accordance with IEC 664-1 and EN 61010-1 Pollution degree 3, working voltage 250 V, overvoltage category III, impulse test voltage 5 kV

Tests Type test Tests according to IEC 255-6 EMC Interference suppression In accordance with IEC CISPR 22 or EN 55022, Class A 1 MHz burst disturbance test In accordance with IEC 60255-22-1, IEC 255 Part 22-1 or IEC 61000-4-12, EN 61000-4-12, Class III, common mode test voltage: 2.5 kV, differential test voltage: 1.0 kV, test duration: > 2 s, source impedance: 200 Ω, Immunity to electrostatic discharge In accordance with IEC 60255-22-2, EN60255-22-2 or IEC 61000-4-2, EN 61000-4-2, level 3 and 4, contact discharge, single discharges: > 10, holding time: > 5 s, test voltage: 6 kV and 8 kV, test generator: 50...100 MΩ, 150 pF/330 Ω, Immunity to radiated electromagnetic energy In accordance with IEC 61000-4-3, and ENV 50204, level 3 and 4, antenna distance to tested device:> 1 m on all sides, test field strength, freq. band 80 to 1000 MHz: 10 V/m and 30 V/m, test using AM: 1 kHz/80%, single test at 900 MHz: AM 200 Hz/100% Immunity to electrical fast transients (bursts) In accordance with IEC 60255-22-4, EN 60255-22-4, IEC 61000-4-4, EN 61000-4-4, level 4, rise time of one pulse: 5 ns, impulse duration (50% value): 50 ns, amplitude: 4 kV, burst duration: 15 ms, burst period: 300 ms, burst frequency: 2.5 kHz, source impedance: 50 Surge immunity test In accordance with IEC 61000-4-5 or EN 61000-4-5, level 4, testing of power supply circuits, unsymmetrical/symmetrical lines, open-circuit voltage: 1.2/50 µs, short circuit current: 8/20 µs, amplitude: 4/2 kV, pulse frequency: > 5/min, source impedance: 12/42 Ω Immunity to conducted interference induced by radio frequency fields In accordance with IEC 61000-4-6 or EN 61000-4-6, level 3, test voltage: 10 V frequency: 150 kHz to 80 MHz Power frequency magnetic field immunity In accordance with IEC 61000-4-8 or EN 61000-4-8, level 4 and 5, frequency: 50 Hz, field strength:

30 A/m continuous or 300 A/m pulsed and 100 A/m continuous or 1000 A/m pulsed

Alternating component (ripple) in DC auxiliary energizing quantity In accordance with IEC 255-11, 12 %


Insulation Voltage test In accordance with IEC 255-5, 2 kV AC, 60 s Direct voltage (2.8 kV DC) must be used for the test voltage of the power supply inputs. The PC interface must not be subjected to the voltage test. Impulse voltage withstand test In accordance with IEC 255-5, half value time: 1.2 µs, time to half pulse: 50 µs, peak value: 5 kV, source impedance: 500 Ω Mechanical robustness Vibration test In accordance with IEC 255-21-1 or EN 60255-21-1, test severity class 1, frequency range during operation:

10 to 60 Hz, 0.035 mm, 60 to 150 Hz, 0.5 g,

frequency range during transport: 10 to 150 Hz, 1 g Shock response and withstand test, bump test In accordance with IEC 255-21-2 or EN 60255-21-2, test severity class 1, acceleration: 5 g/15 g, pulse duration: 11 ms Seismic test In accordance with IEC 255-21-3 or EN 60255-21-3, test procedure A, Class 1, frequency range:

5 to 8 Hz, 3.5 mm/1.5 mm, 8 to 35 Hz, 10 / 5 m/s2

3 x 1 cycle Routine test Tests according to IEC 255-6 or EN 60255-6 Voltage test In accordance with IEC 255-5, 2 kV AC, 1 s Direct voltage (2.8 kV DC) must be used for the test voltage of the power supply inputs. The PC interface must not be subjected to the voltage test. Additional thermal test 100% controlled thermal endurance test

Environmental Conditions Ambient temperature range Recommended temperature range: -5°C to +55°C or +23°F to +131°F Limit temperature range: -25°C to +70°C or -13°F to +158°F Ambient humidity range ≤ 75% relative humidity (annual mean), 56 days with ≤ 95% relative humidity and 40°C or 104°F, condensation not permitted Solar radiation Avoid exposing the front panel to direct solar radiation.

Ratings Measurement inputs Nominal frequency fnom: 50 Hz and 60 Hz (configurable) Operating range:

45 to 55 Hz at fnom: 50 Hz 55 to 65 Hz at fnom: 60 Hz

Current Nominal current Inom: 1 and 5 A (configurable) Nominal burden per phase: < 0.1 VA at Inom Thermal withstand: continuous: 4 Inom (20 A) for 10 s: 30 Inom (150 A) for 1 s: 100 Inom (500 A) Nominal surge current: 250 Inom (1250 A) Voltage Nominal voltage Vnom: 57 to 130 V AC (configurable) Nominal burden per phase: < 0,3 VA at Vnom = 130V AC Withstand: continuous 150 V AC Logic inputs Nominal auxiliary voltage Vin,nom:

24 to 250 V DC 100 to 230 V AC (50/60 Hz)

Operating range: 0.8 to 1.1 Vin,nom with a residual ripple of up to 12 % of Vin,nom Power consumption per input:

0.5 W ± 30% for Vin,nom = 19...110 V DC 5 mA ± 30% for Vin,nom > 110 V DC 0.5 VA ± 30% for Vin,nom = 100 to 230 V AC

Output relays Rated voltage: 300 V DC, 300 V AC Continuous current: 5 A Short duration current: 30 A for 0.5 s Making capacity:

1000 W (VA) at L/R = 40 ms Break capacity:

0.2 A at 220 V DC and L/R = 40 ms 4 A at 230 V AC and cos ϕ = 0.4.

Power supply Nominal auxiliary voltage VA,nom : 24 to 250 V DC /100 to 230 V AC Operating range for DC voltage: 0.8 to 1.1 VA,nom (residual ripple max. 12 % VA,nom ) for AC voltage: 0.9 to 1.1 VA,nom Nominal consumption Initial position approx.: 3 W (VA) Active position approx.: 5 W (VA) Start-up peak current < 3 A for 0.25 ms Stored-Energy Time The relay will withstand interruptions of ≤ 50 ms without de-energising


PC interface Transmission rate: 19200 baud Communication interface In accordance with IEC 60870-5-103 or Modbus, Transmission rate: 300 to 38400 baud (configurable) Electrical connection In accordance with RS 485 or RS 422, 2 kV isolation distance to be bridged Point-to-point link: max. 1200 m Multi-drop link: max. 100 m Plastic fibre connection Optical wavelength: typ. 660 nm Optical output: min. – 7.5 dBm Optical sensitivity: min. – 20 dBm Optical input: max. – 5 dBm Transmission distance: max. 45 m 1)

Glass fibre connection G 50/125 Optical wavelength: typ. 820 nm Optical output: min. – 19.8 dBm Optical sensitivity: min. – 24 dBm Optical input: max. – 10 dBm Transmission distance: max. 400 m 1)

Glass fibre connection G 62.5/125 Optical wavelength: typ. 820 nm Optical output: min. – 16 dBm Optical sensitivity: min. – 24 dBm Optical input: max. – 10 dBm Transmission distance: max. 1400 m 1)

Typical Characteristic Data Main function Minimum output pulse for a trip command:

0.1 to 5 s (configurable) Output pulse for a close command:

0.1 to 5 s (configurable) Pulse duration Function keys F3 and F4: 200ms Pulse duration order 1 and 2: 200 ms Short circuit and earth fault protection Reset ratio for starting and measurement: 95 % Minimum operating time: approx. 15 ms Minimum reset time: approx. 15 ms (for current falling from 2x setting to 0) Unbalance protection Reset ratio for starting and measurement: 95 % Minimum operating time: approx. 35 ms Minimum reset time: approx. 20 ms (for current falling from 2x setting to 0) Over-/Under voltage protection Rest ratio of V<, V>: 1.05 and 0.95 Min. tripping time V>: approx. 20 ms Min. tripping time V<: approx. 40 ms Min. reset time of starting system: approx. 20 ms Specific motor and thermal overload protection Thermal trip threshold: 100 % Reset ratio for thermal trip and warning: 97 % Reset ratio of current stages: 0.95 % Loss of load protection Reset ratio for starting and measurement: 105 % Minimum operating time: approx. 35 ms Minimum reset time: approx. 20 ms (for current falling from 0.8 setting to nominal value)

Setting Accuracy Accuracy of the setting, where the setting ≥ 10 % of the nominal value assuming sinusoidal signals with nominal frequency fnom, total harmonic distortion ≤ 2 %, ambient temperature 20°C and nominal auxiliary voltage VA,nom Short circuit and earth fault protection Phase and Earth current stages: ± 2 % Unbalance protection Unbalance stages: ± 2 % Motor/Thermal overload protection Settngs k*Iref, IStUp>, Iθ>, Istall detection, Istart detection:

± 2 % Settings θ: ± 5 % Loss of load protection Setting I<: ± 2 % Measuring circuit monitoring Settings Idiff, Vmin: ± 2 % Over/ Undervoltage Protection Settings V<, V> : ± 2 %

1) Distance to be bridged with equal output and input on both sides, taking into account a system reserve of 3 dB and typical fibre attenuation.


Timer Accuracy Accuracy of the setting for sinusoidal signals with nominal frequency fnom, total harmonic distortion ≤ 2 %, ambient temperature 20 °C and nominal auxiliary voltage VA,nom Definite time stages ± 2 % + 15 to 35 ms Inverse time stages 2 ≤ I/Iref < 5 ± 12,5 % + 50 ms 5 ≤ I/Iref <10 ± 7.5 % + 30 ms 10 ≤ I/Iref ≤ 20 ± 5 % + 20 ms and for thermal overload characteristics: ± 7,5 % + 15 to 35 ms

Measurement Accuracy Accuracy at nominal value for sinusoidal signals with nominal frequency fnom, total harmonic distortion ≤ 2 %, ambient temperature 20° C, nominal auxiliary voltage VA,nom Operating data Measured input currents: ±1 % Internally calculated positive- and negative sequence currents :± 2 % Active and reactive power: ± 3 % Active and reactive energy: ± 5 % Power factor: ± 3 % Frequency: ± 20 mHz Fault data Short circuit current: ± 3 % Internal clock Real time clock accuracy: < 5 mins /month Accuracy using external synchronisation via communications (synch. interval ≤ 1 min): ± 10 ms

Resolution for fault data acquisition Time resolution 16 sampled values per period Phase currents Dynamic range: 40 Inom Amplitude resolution:

19.2 mArms at Inom = 1 A 97,6 mArms at Inom = 5 A

Earth current Dynamic range: 8 IN,nom Amplitude resolution:

4 mArms at IN,nom = 1 A 20 mArms at IN,nom = 5 A

Dynamic range: 0.8 IN,nom Amplitude resolution:

400 µArms at IN,nom = 1 A 2 mArms at IN,nom = 5 A

Voltage Dynamic range: 2 Unom Amplitude resolution : 0.22 Veff

Recording Functions Event records Number of storable events: max. 75 (later deletion of the oldest event) Allocation of absolute time: by internal time with date Motor start-up record Recorded data: max. phase current and phase to phase voltage VCA, recording of rms values sampled during the last 5 periods, Number of storable motor start-ups: max. 1 (deletion of the last motor start-up) Fault records Number of storable faults with Trip: max. 5 (later deletion of the oldest fault) Allocation of absolute time: by internal time with date Starting records Number of storable startings: max. 5 (later deletion of the oldest starting) Allocation of absolute time: by internal time with date Disturbance records Quantity to be measured: IA, IB, IC, IN, VCA, f Record time per disturbance: max. 2.5 s Number of storable disturbances : max. 8 (later deletion of the oldest disturbance)


Function Parameters Global settings: Reference: AAAA...9999 NB of Inputs: 2 Inputs / 7 Inputs Date: 00/00/00...31/12/99 Time: 00:00:00...23:59:59 Line CT primary: 1...9999 A Line CT sec.: 1 A / 5 A E/Gnd CT primary: 1...3000 A E/Gnd CT sec.: 1 A / 5 A Line VT primary: 0.1...800.0 kV Line VT sec.: 57…130 V Phase sequence : A-B-C / A-C-B General Starting: with IN, I2 / without IN, I2 tGS: 0.00...100.00 s Conn.Meas.Circ.: Standard / Inverse Nominal frequency: 50 Hz / 60 Hz Password: AAAA...ZZZZ Password F3 F4: AAAA...ZZZZ t Open pulse: 0.10...5.00 s t Close pulse: 0.10...5.00 s Thermal model type: Specific / General Stat.Detect. Gen. MP: Input / /Input+I Test Output: Allocation according to selection Operation display: Allocation according to selection Rst.on succesf.start: No / Yes Inst.self reset: No / Yes Reset on fault: No / Yes Battery alarm: No / Yes tExt 1: 0.00....200.00 s tExt 2: 0.00....200.00 s tExt 3: 0.00....200.00 s tExt 4: 0.00....200.00 s Record setting: Disturb Rec Pre Time: 0.1...2.5 s Disturb Rec Post Time: 0.1...2.5 s Dist Trig Gen. Start: No / Yes Trip: No / Yes other Inst: No / Yes Trip relay and latch: Trip Output Relay: Allocation according to selection Latch Relay Trip: Allocation according to selection Latch RL2: No / Yes Latch RL3: No / Yes Latch RL4: No / Yes Latch RL5: No / Yes Latch RL6: No / Yes Latch RL7: No / Yes Specific Motor Protection: Specific Motor Protection Func.: No / Yes Inref: 0.10…4.00 In Factor KP: 1.05…1.50 IstUp>: 1.8…3.0 Iref tIStUp>: 0.1…1.9 s Charact Type: Rec.Square / Logarithm t6Iref: 1…99.99 s Tau after St.-up: 1…60 s Tau Mot.Run: 1…1000 mn Tau Mot.Stop: 1… 1000 mn Perm. Nb St.-ups: 3/2, 2/1 RC permitted θ<: 22…60 % / Blocked St.up Time tStUp: 2.0…100.0 s Block time tE: 2.0…100.0 s

Thermal overload protection: Thermal Overload Funct.: No / Yes θ Inhibit: No / Yes Iθ>: 0.20...1.50 In Ke: 1...10 Te1: 1...180 min Te2: 1…360 min Tr: 1…999 min θ Alarm: No / Yes θ Alarm: 20...100 % θ Restart blocking: No / Yes θ Restart blocking: 20…100 % Excess Long Start: Excess Long Start Funct.: No / Yes Istart Detection: 1.0…5.0 IΘ tIstart: 1… 200 s Blocked rotor whilst running or at start: Blocked Rotor Funct.: No / Yes tIstall: 0.1…60.0 s Stalled Rotor : No / Yes Istall Detection: 1.0… 5.0 Iθ Locked Rotor at start: No / Yes Short circuit protection [Phase]: I> Function: No / Yes I>: 0.10...40.00 Inom I>> Function: No / Yes I>>: 0.10...40.00 Inom tI>>: 0.00...150.00 s I>>> Function: No / Yes I>>>: 0.10...40.00 Inom tI>>>: 0.00...150.00 s Earth fault protection: IN> Function: No / Yes IN>: 0.010...8.000 INnom (standard range) 0.002...0.800 INnom ( sensitive range) tIN>: 0.00...100.00 s IN>> Function: No / Yes IN>>: 0.010...8.000 INnom (standard range) 0.002...0.800 INnom (sensitive range) tIN>>: 0.00...100.00 s Unbalance protection: I2> Function: No / Yes I2>: 0.04...0.80 Inom tI2>: 0.00...150.00 s I2>> Function: No / Yes TMS I2>: 0.200...2.000 I2>>: 0.04...10.80 In Undervoltage protection: V< Function: No / Yes V<: 5.0…130.0 V tV<: 0 ms … 599.99 s INHIB V<: No / Yes Overvoltage protection: V> Function: No / Yes V>: 5.0…260.0 V tV>: 0 ms… 599.99 s Loss of load protection: I< Function: No / Yes I<: 0.05...1.00 Inom tI<: 0.00...100.00 s Tinhibit: 0.05…300.00 s


Number of starts limitation: Start NB Limitat. Funct: No / Yes Treference: 10… 120 min Hot Start NB: 1…5 Cold Start NB: 1…5 Tinterdiction: 1…120 min Minimum time between 2 starts: Time betw. Start funct.: No / Yes T betw 2 start: 1…120 min Reacceleration authorisation: Reaccel. Authorisation Funct: No/ Yes Detect Volt Dip: Measured / Log. Input Detection V Dip: 5…130 V Restoration V Dip: 5…130 V Volt. Dip Durat Treac: 0.10… 10.00 s Anti-backspin: ABS Function: No / Yes tABS: 1…7200 s Busbar voltage detection: Bus Voltage Ctrl Funct: No / Yes VBUS: 5.0…130.0 V Programmable Logic and logic equations: Allocation according to selection and logic equat time delay Equ A to Equ D : Toperation:0.0…3600.0 s Treset: 0.0…3600.0 s Circuit breaker failure protection: CB Fail Funct.: No / Yes I< CBF: 2...100 % Inom tCBF: 0.00...10.00 s Setting group selection: Change Group mode: Edge Level

Level 2p Setting Group: 1 / 2 Keep Time: No / Yes tKeep: 0.01...65.00 s Cold load pick up: Cold Load PU Funct.: No / Yes Detect PU: Log. Input Trans I Input + I I> PU: 10...200 % Inom Cold Load PU I>: No / Yes Cold Load PU I>>: No / Yes Cold Load PU I>>>: No / Yes Cold Load PU IN>: No / Yes Cold Load PU IN>>: No / Yes Cold Load PU I2>: No / Yes Cold Load PU I2>>: No / Yes Cold Load PU Iθ;Iref: No / Yes Cold Load PU Level: 100...500 % Cold Load tCL: 0.0...3600.00 s

Blocking logic 1: Block. Log1 tI>: No / Yes Block. Log1 tI>>: No / Yes Block. Log1 tI>>>: No / Yes Block. Log1 tIN>: No / Yes Block. Log1 tIN>>: No / Yes Block. Log1 tI2>: No / Yes Block. Log1 tI2>>: No / Yes Block. Log1 Therm: No / Yes Block. Log1 tI<: No / Yes Block. Log1 tExt 1: No / Yes Block. Log1 tExt 2: No / Yes Block. Log1 tCT: No / Yes Blocking logic 2: See selection Blocking logic 1 CB Supervision: Trip Circuit Superv.: No / Yes tSup: 0.10...10.00 s CB Opening Time Superv.: No / Yes CB Opening Time : 0.05...1.00 s CB Closing Time Superv.: No / Yes CB Closing Time: 0.05...1.00 s CB Operation NB Superv.: No / Yes CB Operation NB: 0...50000 Sum A n Superv.: No / Yes Sum A n: 0...4000 M An

n: 1 / 2 CT / VT Supervision: CT Superv.: No / Yes Op. Mode Idiff>.: 2 phases / 3 phases tIdiff>: 0.10...90.00 s VT Superv.: No / Yes Vmin<: 5…95 V tVmin:: 0.10...90.00 s


Measuring and operating data Operating Data: IA Rms: 0.00...400000.00 A IB Rms: 0.00...400000.00 A IC Rms: 0.00...400000.00 A IN Rms: 0.00...24000.00 A (standard range) 0.00…2400,00 (sensitive range) VCA Rms: 0.00…3649000.00 V IA Rms Sec.: 0.000...40.000 Inom IB Rms Sec.: 0.000...40.000 Inom IC Rms Sec.: 0.000...40.000 Inom IN Rms Sec.: 0.000...8.000 INnom (standard range)

0.000…0.800 INnom (sensitive range) I1 positive: 0.00...400000.00 A I1 positive Sec.: 0.000...40.000 Inom I2 negative: 0.00...400000.00 A I2 negative Sec.: 0.000...40.000 Inom I2 negative / I1 positive: 0...9990 % I0: 0.00...8000.00 A (standard range) 0.00...800.00 A (sensitive range) Frequency: 45.00...65.00 Hz Max. Ph. Current: 0.00...400000.00 A Active Power P: +/- 0.00…2100000.00 kW Reac. Power Q: +/- 0.00…2100000.00 kVAR Appar. Power S: 0.00…2100000.00 kVA WATT-Hours +: 0.00…2000000.00 kWh WATT-Hours -: 0.00…2000000.00 kWh VAR-Hours +: 0.00…2000000.00 kVARh VAR-Hours -: 0.00…2000000.00 kVARh Power Factor: -1.00…1.00 Process Data: % I FLC: 0…9999 % Thermal State: 0…100 % T before TH Trip: 0…65000 s Permit Start NB: 0…5 T before Start: 0…7200 s Start Current: 0…400000 A Start Time: 0…200 s Start Heating: 0…100 % Motor Start NB: 0…65535 Emerg Start NB: 0…65535 Motor Operating Hours: 0…65535 h Event counters: General start NB: 0...65535 Total Trip NB: 0...65535 tExt 1;2 Trip NB: 0...65535 tI>;>>;>>> Trip NB: 0...65535 tIN>;tIN>> Trip NB: 0...65535 tI2>;tI2>> Trip NB: 0...65535 tV< Trip NB: 0...65535 tV> Trip NB: 0...65535 Volt Dip Trip NB: 0...65535 tIstart Trip NB: 0...65535 tIstall Trip NB: 0...65535 Locked Rotor Trip NB: 0...65535 tI< Trip NB: 0...65535 tEqu A Trip NB: 0...65535 tEqu B Trip NB: 0...65535 tEqu C Trip NB: 0...65535 tEqu D Trip NB: 0...65535 CB Fail Trip NB: 0...65535 CB Monitoring: CB Close time: 0.05...1.00 s CB Open NB: 0...50000 Sum A n IA: 0...4000 E06 An

Sum A n IB: 0...4000 E06 An

Sum A n IC: 0...4000 E06 An


Dimensional drawing

Figure 7: Case dimensions

Surface-mounted case

Flush-mounted case with panel cut-out


Connections

A

I> I>

B

C

X1

10

11 T91U3U

Voltage measuringinput

X1

1

2

3

4

5

6

7

8

Current measuringInput

T1

T2

T3

T4

I1

I2

I3

IE

MiCOM P226C

X1

13

14

U100

UH(+)(-)

Aux. PowerSupply

UE

UE

Signal Inputs

U1

U2

X1

15

16

17

18

Output relaysX3

35

36

32

33

34

29

30

31

27

28

22

26

25

24

23

19

20

21

K1

K2

K3

K4K5K6K7

K8

X2

1

2

3

4

5

6

7

UE

UE U3

U4

UE

UE U5

U6

U7UE

Signal inputs(optional)

X9

1

2

3

4

5

RS 485

U19

X//YD1/D2[T/R]

D1[T]

or wire leads 3)

1) fixed signal assignment2) Normally-energized (closed-circuit) contact3) Two or for-wire connection is selected via the setting parameters Terminals 1 and 2 are assigned with D2 [R] for a four-wire connection Terminals 4 and 5 are not used for a two-wire connection

-

+-

Trip command 1)

Blocked / faulty 1) 2)

+

X7

1

X8

1

X6

2

3

5

According to order

U17 X/Y

U18 X/Y

PC Interface

RS 232

U16

X/Y

D1[T]D2[R]

E2[G]

communication-interfacewith optical fibre

Figure 8: P226C pin-out diagram with standard current circuit connection example


Ordering information Versions Order-No.

P226C Motor and Overcurrent protection in compact design P226C- A 0 Z 0 0

in casing for surface and flush mounting, including cover frame Earth current input 0.01...8 IN,nom B 0.002...0.8 IN,nom C Communication interface Without 0 MODBUS, for wire lead, RS485, isolated 1 IEC 60870-5-103, for wire lead, RS485, isolated 3 MODBUS, for plastic fibre connection, FSMA connector A IEC 60870-5-103, for plastic fibre connection, FSMA connector C MODBUS, for glass fibre connection, ST connector J IEC 60870-5-103, for glass fibre connection, ST connector L Language French 0 English 1 Spanish 1) 2 German 3 Italian 1) 4 Russian 1) 5 Polish 6 Portuguese 1) 7 Dutch 1) 8 Czech 1) A Hungarian 1) B Case design Compact case with 2 bin. inputs D Compact case with 7 bin. inputs C 1) On request


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Motor and Over Current Protection Device 226

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Transcript of Motor and Over Current Protection Device 226