7UM512 Generator protection relay (Version V3)
Transcript of 7UM512 Generator protection relay (Version V3)
Generator Protection
Siemens LSA 2.5.3 . February 1997 1
Application
The 7UM512 unit is a numerical genera-tor protection relay that provides a practi-cal combination of protection functionsfor generators. The unit contains all theprotection functions required for smallgenerators, such as emergency genera-tors or private power plants. The unit isalso a module in comprehensive protec-tion systems for large generators basedon the 7UM51 range. The 7UM51 is sup-plemented by 7UT51 differential protec-tion relays.
Construction
The unit is of compact construction andcomprises all components for:� Measured value acquisition and
evaluation� Operation and display� Indication and command output� Acquisition of binary signals� Serial data transmission� Auxiliary voltage supplyThe unit is supplied with housings forflush and surface mounting. The modelfor panel flush mounting or cubiclemounting has rear connection terminalsand can be supplied with or without aglass cover. The model for panel surfacemounting has 100 screw terminals ac-cessible from the front.
Functions
The unit contains the following integratedprotection functions:� Overcurrent–time protection (with un-
dervoltage seal-in)� Over/undercurrent protection� DC voltage protection� Single-phase overvoltage protection� Single-phase undervoltage protection� Overfrequency protection� Underfrequency protection� Active power protection� Reactive power protection� Unbalanced–load protection� Stator earth-fault (directional) protec-
tion� Direct coupling (for separate protection
equipment)� Tripping circuit monitoring
Measurement method
The influences of superimposed har-monics, high-frequency transients, tran-sient DC current components and differ-ing CT saturation levels is suppressed toa large degree by the use of a powerfulmicroprocessor and complete digital sig-nal processing (measured value acquisi-tion, measured value conditioning andmeasured value processing).Precise measurement of the current andvoltage over a wide frequency range of10 to 68 Hz is achieved by adapting thesampling rate.
Some protection functions make use ofthe symmetrical current component. Achange in the phase sequence, whichcan occur when the direction of rotationis reversed in a pumped-storage powerplant, is taken into account by the protec-tion relay. The phase sequence is alsosignalled to the protection relay as abinary indication.
Serial interfaces
The relay is equipped with two serialinterfaces. The interface at the front issuitable for connection of an AT-compat-ible personal computer. An operating andanalysis software program DIGSI is avail-able for convenient and clear setting,evaluation of fault records and data, aswell as for commissioning. The interfaceon the rear of the unit is either an iso-lated V.24 interface or an 820-nm fibre-optic interface. It is used either as a sys-tem interface for connecting to theSINAUT LSA substation control andprotection, i.e. to a protection data mas-ter unit (protocol acc. to VDEW/ZVEI rec-ommendation, company-specific), or asan operating interface for connecting aPC.
Settings
All setting parameters can be input eithervia the integrated operator and displaypanel or via a personal computer. The op-erator is guided through the setting proc-ess. The parameters are written into non-volatile memories so that the settingsremain secure even during interruption ofthe supply voltage.
7UM512 Generator protection relay (Version V3)
Fig. 17UM512 generator protection relay (V3)
51
51/37
64 DC
59
27
Scope of functions
32
32
46
64
64 R
81
VAR
Siemens AG 1997�
Generator Protection
Siemens LSA 2.5.3 . February 19972
Self–monitoring
All important hardware and softwarecomponents are monitored continuously.Any irregularities in the hardware or inthe program sequence are immediatelydetected and alarmed. This significantlyimproves the security and the availabilityof the protection system.
Overcurrent–time protection (ANSI 51)
This stage is for use as short-circuit andstandby protection for protection gearconnected upstream, such as differentialprotection or distance protection.An undervoltage stage provides the op-tion of maintaining the overcurrent ex-citation if the current returns below thestarting threshold and at the same timethe voltage drops because the excitationsystem cannot be powered sufficiently.
Over/undercurrent protection (ANSI 51/37)
The undercurrent protection is versatile.It detects disconnected and interruptedlines or, when used as protection forlarge motors, mechanical faults in thedriven machine that can cause the motorto be off-loaded. With this function, it isalso possible to implement simple circuit-breaker protection.The protection function can be ANDed orORed with an input binary signal.
DC voltage protection (64 DC)
The protection function is designed forgenerators that are started with a fre-quency converter. It protects the genera-tors (and the parts of the station that aregalvanically connected with them) fromDC voltage. The function can respond toviolation either of an upper or a lowerlimit value.
Overvoltage protection (ANSI 59)
The protection prevents insulation faultsdue to an excessive voltage. The protec-tion function evaluates a phase-to-phasevoltage. It provides two stages.
Undervoltage protection (ANSI 27)
Undervoltage protection compares aphase-to-phase voltage with a lower limitvalue. This function is used for asynchro-nous motors and pumped–storage motor-generators and prevents instability due tovoltage.To stabilize the voltage during a powerdeficiency, the undervoltage protectionfunction can be used for load shedding.A further criterion for power deficiency innetworks is a drop in the frequency be-low the nominal frequency. To combinethe two criteria in a protection function,the response value of the undervoltagefunction can be made to depend on thefrequency. If the network frequency thendeviates from the nominal frequency, theundervoltage threshold is raised.
Frequency time protection (ANSI 81)
The 7UM512 protection relay containstwo-stage frequency protection. Eachstage can be used as either an overfre-quency or underfrequency protection.The algorithm filters out the fundamentalreliably even from distorted voltages andperforms a fast and precise frequencycalculation.
Active power protection (ANSI 32)
The protection relay can utilize as protec-tion criterion either exceeding of thepower output of a generator or exceedingof the power input (reverse power). Thepower is calculated by the 7UM512protection relay from a phase-to-phasevoltage and a phase current.The monitoring of the power output of agenerator can be useful for starting andshutting down generators. As reversepower protection, the function protectsthe driving steam turbines and is alsoused for service shutdown of the genera-tor.
Reactive power protection (ANSI 32 VAR)
This protection function can be used as asingle-stage underexcitation protection. Itprotects the generator from falling out ofstep because of underexcitation. Thereactive power is calculated from aphase-to-phase voltage and a phase cur-rent.
7UM512 Generator protection relay (Version V3)
Fig. 2Frequency-dependent undervoltage function (Vset < 60 V)
c=0
V (V)c=6
fN = 50Hz
f (Hz)
c=5
c=4
c=3
c=2
c=1
44 45 46 47 48 49 51 52 53 54 55
60
70
80
100
110
120
130
140
150
160
90
Generator Protection
Siemens LSA 2.5.3 . February 1997 3
Unbalanced–load protection (ANSI 46)
Asymmetrical current loads of the threephases of a generator cause heating ofthe rotor because of the reverse field thatarises.This protection function detects an asym-metrical load on three-phase generators.It works on the principle of the symmetri-cal components and evaluates the nega-tive system of phase currents. The heat-ing in the generator is calculated in theprotection relay. Separately settablewarning and tripping stages compare thecalculated overtemperature with the cor-responding threshold values. Moreover,the unbalanced load of an independentstage to which a delay element has beenadded is evaluated.
Stator earth-fault protection (ANSI 64)
On generators operated in isolation, anearth fault results in the occurrence of adisplacement voltage in the generatorneutral point. In a unit connection, a dis-placement voltage is a sufficient, selec-tive protection criterion. If a generator isgalvanically connected with a busbar, thedirection of the earth current flowingmust also be evaluated for selectiveearth–fault detection. A directional earth–fault protection function is required.The 7UM512 protection relay measuresthe displacement voltage with a specialinput on a voltage transformer at the gen-erator neutral point or at the open deltawinding of a voltage transformer. In thisway, earth–fault protection for up to 95%of the stator winding of a generator oper-ated in a unit connection is possible.For the earth current, a separate currentmeasuring input is also available. The sta-tor earth–fault protection function canthus also function as a directional earth-fault protection. It is possible to switchbetween the two modes with a coupledexternal binary signal (circuit-breakerposition).
7UM512 Generator protection relay (Version V3)
Fig. 3Trip range of the unbalanced–load protection
Unbalanced loadalarm stage �2>
Thermaltrip stage
Unbalanced loadtrip stage �2>>Thermal
alarm stage
tTALARM
T>>TRIP
�2perm �2>> �2
Fig. 4Example: Automatic shutdown of idling generator
�<0.05 �N &
60 s Tripcommand
BI
BI
Generatorbreaker“closed”
�L
Interlockingby excitationbreaker atstart up
&
Fig. 5Example: Circuit-breaker failure protection
�>1.1 �N &
0.5 sTrip ofsurroundingbreaker
BI
BI
�L
&
Start byprotection tripcommand(doubled forsafetyreasons)
Generator Protection
Siemens LSA 2.5.3 . February 19974
Rotor earth–fault protection (ANSI 64R)
This function is designed to detect earthfaults in the exciter and uses an auxiliaryAC voltage of approx. 45 V. The protec-tion calculates the resistive componentof the complex earth impedance fromthis auxiliary voltage and from the earthcurrent flowing. This protection providestwo stages. The high-impedance measur-ing stage can be used as an alarm,whereas the low-impedance measuringstage can be used to disconnect the gen-erator. Interruptions in the measuring cir-cuit are detected by the 7UM512 and canbe signalled if required.
Direct coupling
Direct coupling functions are functions ofthe 7UM512 that are used for acquisitionof binary information. This binary informa-tion is entered in the fault indicationmemory. Such information can actuateLEDs, alarm relays and command relays.Each ”direct coupling” can delay the ef-fect of the binary information by an indi-vidual timer. The “direct coupling” func-tion is used for processing of informationfrom the Buchholz relay or generatorcommands.
Tripping circuit monitoring
The 7UM512 protection relay is able tomonitor two tripping circuits (circuit-breaker coils including incoming cables)for correct functioning.
Operational measurement
The values acquired and calculated by theunit can be displayed on the LD display oron a PC. These include: Conductor cur-rents and voltages (both primary and sec-ondary), earth current, neutral voltage,current positive-sequence component,frequency, active and reactive power,power factor, current-voltage angle, ex-citation voltage, negative-sequence com-ponent of the conductor currents over-temperature due to unbalanced load.
Fault recording
In the protection relay, instantaneous orrms values are implemented dependingon your selection. The recording durationis up to 5 s for instantaneous values andup to 60 s for rms values. In the 7UM512protection relay, primary values of up toeight faults can be stored. The total num-ber depends on the duration of each faultand the parameterized longest recordingduration. Setting a leading and trailingtime and the start event (start on activa-tion or on trip) permits adaptation to dif-ferent requirements. The fault data canbe transferred to the SINAUT LSAsubstation control and protection or to aPC and evaluated there.
Trip matrix/trip circuits
The unit is equipped with five trip relays.These can be arbitrarily assigned to theabove mentioned protection functions byparameterization (software matrix). Fur-thermore, each protection function canbe switched “On” or “Off” via the opera-tor panel. A third “Blocked” mode per-mits commissioning of the unit with thelocal annunciations and the alarm relaycircuits operative, but without tripping ofthe circuit-breakers.With the many parameterizing possibili-ties provided, testing of and alterations tothe circuit-breaker operation can be per-formed during commissioning, as well asduring normal operation without the needfor rewiring.
Indication memory
The unit provides detailed data for theanalysis of faults and for checking statesduring operation. All the indication faultmemories listed below are protectedagainst power supply failure.� Time
The unit has a battery-backed clockthat can be synchronized with a binarysignal or via the system interface. Allindications are assigned a time anddate.
� Fault indicationsThe indications of the last three faultscan be retrieved at any time.
� Operational indicationsAll indications that are not directlyassociated with a fault are stored inthe operational indication buffer.
Assignable alarm relays, LEDs andbinary inputs
The alarm relays and LEDs can be freelyassigned for user-specific output and dis-play of indications. The storable LED dis-plays are protected against power supplyfailure.All binary inputs can be operated eitheras make circuits or as break circuits.They can also be assigned as defined bythe user. The signal input at a binary inputcan be logically combined with severalprotection functions.
7UM512 Generator protection relay (Version V3)
Generator Protection
Siemens LSA 2.5.3 . February 1997 5
Technical data
Input circuits Rated currentRated voltage, can be parameterizedRated frequency, can be parameterizedThermal overload capability
in voltage path, continuousin current path, continuous
1 s10 s
in earth current path, continuous1 s10 s
DC voltage inputs, continuousPower consumption
in voltage path at VN = 100 Vin current path at �N = 1 A
at �N = 5 A
1 or 5 A100 to 125 V AC50/60 Hz
140 V AC4 x �N100 x �N20 x �N
15 A300 A100 A60 V DC
< 0.3 VA< 0.1 VA< 0.5 VA
Voltage supplyvia integrated DC/DC converter
Rated auxiliary voltage Vaux
Permissible tolerance of rated auxiliary voltagePower consumption
24, 48 V DC or 60, 110, 125 V DC or220, 250 V DC– 20 to + 15 %max. 16 W
Setting ranges
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Overcurrent time protection (ANSI 51)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Current �>Trip delay, resetting delayReset ratio (settable)Response timeUndervoltage seal-in V<Excitation hold time during undervoltageReset ratio
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0.1 x �N to 8 x �N0 to 32 s0.9 to 0.99Approx. 40 ms20 to 100 V0 to 32 s1.05
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Over/undercurrent protection (ANSI 51/37)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Current �><Trip delay, resetting delayReset ratio for �>
for �<Response time
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0.05 to 8 A0 to 32 s0.951.05Approx. 40 ms
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DC voltage protection (V = ><)(ANSI 64 DC)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Voltage V = ><Trip delay, resetting delayReset ratio V = >
V = <Response time for operating state 1
0
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0.1 to 8.5 V0 to 32 sApprox. 0.981.1<60 ms <200 ms
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Overvoltage protection (ANSI 59) (single phase)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Voltage V>, V>>Trip delay, resetting delayReset ratioResponse time
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30 to 180 V0 to 32 sApprox. 0.98Approx. 50 ms
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Undervoltage protection (ANSI 27)(single phase, or optionally frequency-dependent)
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Voltage V<Trip delay, reset delayReset threshold (function of V–f characteristic)Response time
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20 to 140 V0 to 32 s2 to 6 V above response valueApprox. 50 ms
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Frequency protection (ANSI 81) ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Number of stepsFrequency f1, f2Trip delay, reset delayReset differenceResponse timeUndervoltage blocking V<Reset ratio of the blocking
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240 to 65 Hz0 to 32 s0.1 HzApprox. 120 ms40 to 100 V1.05
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Active power protection (ANSI 32)(reverse power protection) ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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Active power | P |> (with reference to SN)Trip delay, reset delayReset ratioResponse time
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1 to 120 %0 to 32 s0.9 or 0.5 % of SN� 190 ms
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Reactive power protection(ANSI 32 VAR)(underexcitation protection)
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Reactive power | Q |> (with reference to SN)Trip delay, reset delayReset ratioResponse time
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1 to 120 %0 to 32 s0.9 or 0.5 % of SN� 190 ms
7UM512 Generator protection relay (Version V3)
Generator Protection
Siemens LSA 2.5.3 . February 19976
Technical data (continued)
Setting ranges (continued)ÁÁÁÁÁÁÁ
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Unbalanced–load protection (ANSI 46)
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Alarm stage �2> (with reference to �N)Delay of warningThermal time constantThermal alarm stage (with reference to the tripping overtempera-ture)Tripping stage �2>> (with reference to �N)Reset ratioTrip delay, reset delayResponse time of the independent characteristic
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3 to 30 %0 to 32 s100 to 2 500 s70 to 99 %
10 to 80 %0.950 to 32 s�60 ms
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Stator earth-fault protection (ANSI 64)
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Displacement voltage Vearth>Current �earth>Angle of the directional straight lineReset ratio Vearth / �earthTrip delay, reset delayResponse time
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5 to 120 V2 to 100 mA0 to 360°0.7/0.950 to 32 s�60 ms
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Rotor earth-fault protection (ANSI 64R)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Alarm stage RAlarm<Tripping stage RTRIP<Reset ratioTrip delay, reset delayResponse timePermissible rotor-earth capacitance
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
3 to 30 k�1 to 5 k�1.250 to 32 s�80 ms0.15 to 3 �F
ÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Direct coupling ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
NumberTrip delay t1, t2, t3, t4Reset delay t1, t2, t3, t4Response time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
40 to 32 s0 to 32 s<15 msÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Switchover of the rotating field direc-tion
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Response timeÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
200 ms (requirements: � < 0.1 x �N and V < 0.1 x VN)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Response tolerances under nominalconditions
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
CurrentVoltagePowerTimes
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
3 % of the setting value3 % of the setting value0.3 % of SN or 3 % of the setting value10 ms
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Operational measured values ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
VoltageCurrentPowerPower factorPhase angleUnbalanced load Reverse current
OvertemperatureDC voltageFrequency
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
VPH1 – PH2, V0�PH1, �PH2, �PH3, �pos., �0P/SN, Q/SNcos ��
�2�2THV =f
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Fault data acquisition ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Either instantaneous values (12 values per cycle)Or calculated values (one value per cycle)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁvPH1, vPH2, vPH3, iPH1, iPH2, iPH3, VErrVpos., �pos., �PH1, �PH2, �PH3, �E, cos �, f – fN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ContactsÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Potential-free trip contacts
Switching capacity makebreak
Permissible current continuous0.5 s
Switching voltageAlarm contactsSwitching capacity make/breakPermissible currentSwitching voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
3 x 2 NO, 2 x 1 NO (total of 5 trip relays)1000 W/VA30 W/VA5 A30 A250 V DC1320 W/VA1 A250 V DC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
DisplaysInputs
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
LED displays on the front of the unitOptocoupler, for 24 to 250 V DC Current consumption independent of voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
168approx. 2.5 mAÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Construction
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
For panel surface mountingWeight approx.
For panel flush mounting, cubicle mountingWeight approx.
Degree of protection acc. to EN 60 529
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
in housing 7XP20 40–112 kgin housing 7XP20 40–210.5 kgIP 51
7UM512 Generator protection relay (Version V3)
Generator Protection
Siemens LSA 2.5.3 . February 1997 7
Technical data (continued)
Serial interfaces Operating interface
System interface
Protocol
Error detectionTransfer rateProcedureConnection electrical
DistanceConnection fibre-optic cable
Optical wavelengthPermissible line attenuationDistance
On the front, not isolated, suitable for con-nection to serial interface of a personalcomputer, 25-pole socketIsolated, suitable for coupling to centralequipmentSiemens-specific or acc. to VDEW/ZVEIrecommendationHamming distance d = 44800, 9600 or 19200 BdAsynchronousSimilar to V.24/V.28 to CCITT or RS232C toEIA, 2 kV isolationUp to 1000 mTwo integrated FSMA plug connectors forFO connection820 nmMax. 8 dB for glass-fibre 62.5/125 �mMax. 2 km
CE–conformity, standards This product is in conformity with the directives of the Council ofthe European Communities on the approximation of the laws ofthe Member States relating to the electromagnetic compatibility(EMC Council Directive 89/336/EEC) and concerning electricalequipment for use within specified voltage limits (low voltagedirective 73/23/EEC). The product conforms with the internationalstandard IEC 255 and the national standard DIN 57 435 part 303(corresponding to VDE 0435 part 303).The relay is designed for use in an industrial environment, forinstallation in standard relay rooms and compartments so thatwith proper installation electro–magnetic compatibility (EMC) isensured.
Conformity is proved by tests performedby Siemens AG in line with article 10 of theCouncil Directives in accordance with thegeneric standards EN 50081 and EN 50082for the EMC directive 89/336/EEC andstandard 60255–6 for the low voltage di-rective.
Insulation testsIEC 255-5, VDE 0435 Part 303
Voltage test (routine test) all circuits except the auxiliary voltageVoltage test (routine test), for auxiliary voltage onlyImpulse voltage test (type test), all circuits, class III
2 kV (rms value), 50 HzDC 2.8 kV5 kV (peak value), 1.2/50 �s, 0.5 J,3 positive and 3 negative impulses at inter-vals of 5 s
EMC–tests; immunity (type test)
Standards: IEC 255–6, IEC 255–22(international product standard)EN 50082–2 (generic standard)VDE 0435 part 303 (Germanproduct standard)
High frequency test with 1 MHz interferenceIEC 255–22–1, class III and VDE 0435 part 303, class IIIElectrostatic dischargeIEC 255–22–2, class III and IEC 1000–4–2, class IIIRadio–frequency electromagnetic field, non–modulatedreport IEC 255–22–3, class IIIRadio–frequency electromagnetic field, amplitude modulatedIEC 1000–4–3, class IIIRadio–frequency electromagnetic field, puls modulatedENV 50204, class IIIFast transientsIEC 255–22–4 class III, IEC 1000–4–4 class III
Conducted disturbances induced by radio–frequency fields, amplitude modulatedIEC 1000–4–6, class IIIPower frequency magnetic fieldIEC 1000–4–8, class IVIEC 255–6
2.5 kV (peak), 1 MHz, � = 15 �s,400 shots/s, duration 2 s4 / 6 kV contact discharge, 8 kV air dis-charge, both polarities, 150 pF, Rl = 330 �
10 V/m, 27 to 500 MHz
10 V/m, 80 to 1 000 MHz, AM 80 %, 1 kHz,
10 V/m, 900 MHz, repetition frequency 200 Hz, duty cycle 50 %2 kV, 5/50 ns, 5 kHz, burst length = 15 ms,repetition rate 300 ms, both polarities, Rl = 50 ��� duration 1 min10 V, 150 kHz to 80 MHz, AM 80 %, 1 kHz
30 A /m, continuous, 300 A /m for 3 s, 50 Hz0.5 mT; 50 Hz
EMC–tests; emission (type test)
Standard: EN 50081–2 (European generic standard for use in industrial environment)
Conducted interference voltage, auxiliary voltageCISPR 11, EN 55011 and VDE 0875 part 11Interference field strength CISPR 11, EN 55011 and VDE 0875 part 11
150 kHz to 30 MHz, group 1class A30 to 1 000 MHz, group 1class A
Climatic conditions Permissible ambient temperature during servicelimit operating temperatureduring storageduring transport
Humidity class
– 5� to + 55�C– 20� to + 70�C– 25� to + 55�C– 25� to + 70�CAnnual average �75 % relative humidity;on 30 days/year up to 95 % relative humid-ity; condensation not permissible
Mechanical stress testsIEC 255–21–1, IEC 68–2
Permissible mechanical stress during service
during transport
10 Hz to 60 Hz: 0.035 mm amplitude60 Hz to 500 Hz: 0.5 g acceleration5 Hz to 8 Hz: 7.5 mm amplitude8 Hz to 500 Hz: 2 g acceleration
7UM512 Generator protection relay (Version V3)
Generator Protection
Siemens LSA 2.5.3 . February 19978
Selection and ordering data
Order No.7UM512 Generator protection relay (version V3) 7UM512 � – � � B 0 1 – 0 � B 0
Rated current at 50 to 60 Hz, 100 to 125 V AC1A5A
15
Rated auxiliary voltage24 V, 48 V DC60 V, 110 V, 125 V DC220 V, 250 V DC
245
Constructionfor panel flush mounting or cubicle mountingfor panel surface mountingfor panel flush mounting or cubicle mounting without glass cover
CDE
Rear serial interface (suitable for station control and DIGSI operating program)electricaloptical
BC
Accessories
Rotor earth-fault protection
Series transformer 100/45 V AC (W x H x D in mm) 135 x 170 x 85Coupling device 2 x 4 �F 196 x 300 x 110Series resistor 196 x 300 x 146
7XR8500–07XR60003PP1336–0DZ013002
Stator earth-fault protection
Voltage divider 500/100 V 196 x 300 x 146 3PP1336–1CZ0113001
DC voltage protection
Voltage divider 1 : 20 and 1 : 10 196 x 300 x 110 3PP1326–0BZ012009
Operation software
DIGSI program (suitable for all protection relays 7UM..., 7UT..., 7SJ..., 7SA..., ...) GermanEnglish
Test version: GermanEnglish
Connecting cables for protection relays (25-pin) – PC (9-pin); (other variations supplied on request)
7XS5020–0AA007XS5020–1AA00
7XS5021–0AA007XS5021–1AA00
7XV5100–2
Documentation
German
Katalogblatt LSA 2.5.3: Maschinenschutz 7UM512 (Version V3)Handbuch: Maschinenschutz 7UM512 (Version V3)
E50001–K5752–A131–A2C53000–G1100–C110–1
English
Catalog LSA 2.5.3: 7UM512 Generator protection (Version V3)Manual: 7UM512 Generator protection (Version V3)
E50001–K5752–A131–A2–7600C53000–G1176–C110–1
7UM512 Generator protection relay (Version V3)
Generator Protection
Siemens LSA 2.5.3 . February 1997 9
7UM512 Generator protection relay (Version V3)
Fig. 6Connection diagram for the 7UM512 generator protection relay (Version V2), from state of development EE
Net
wor
k
L1L2
L3
kK L
Exita
tion
Bina
ry in
puts
1 to
8, a
larm
rela
ys,
trip
rela
ys a
nd L
EDs
are
mar
shal
labl
e
LED
rese
t
Bloc
k
> <
Unba
lanc
ed lo
ad b
lock
Dire
ct co
uplin
g
Coup
ling
Optio
nal
fibre
–opt
ic o
rV.
24 s
eria
l int
erfa
ce
Over
curre
nt tr
ip
>
Over
/und
ercu
rrent
trip
>
<
Stat
or e
arth
–fau
lt tri
p
>
Roto
r ear
th–f
ault
trip
>
Roto
r ear
th–f
ault
war
ning
Unde
r / O
verv
olta
ge tr
ip
Exte
rnal
com
man
d tri
p
DC v
olta
ge
> <
Unba
lanc
ed lo
ad (
>
;
)
Unbl
ance
d lo
ad a
larm
sta
ge
Roto
r ear
th–f
ault
prot
ectio
n in
oper
ativ
e
Inte
rnal
failu
re
Trip
com
man
d 1
Trip
com
man
d 2
Trip
com
man
d 3
Trip
com
man
d 4
Trip
com
man
d 5
Pow
er s
uppl
y
�2T
H�2
�L2
�L1
�L3N
�lo
adi s
ec lo
ade
nR L
100
V ~
45 V
~
�>
< 1
Vers
ion
for p
anel
sur
face
mou
ntin
g
Vers
ion
for p
anel
flus
h m
ount
ing/
cubi
cle
mou
ntin
g
Alar
m re
lay
1
Fibr
e–op
tic in
terfa
ce
V.24
inte
rface
, 2-k
V is
olat
ed
Bina
ryin
put 1
7B1
659
3B1
L+ L––
–
Alar
m re
lay
2
Alar
m re
lay
3
Alar
m re
lay
4
Alar
m re
lay
5
Alar
m re
lay
6
Alar
m re
lay
7
Alar
m re
lay
8
Alar
m re
lay
9
Alar
m re
lay
10
Alar
m re
lay
11
Alar
m re
lay
12
Unit
mal
func
tion
alar
m
Trip
rela
y 1
Trip
rela
y 2
Trip
rela
y 3
Trip
rela
y 4
Bina
ryin
put 2
Bina
ryin
put 3
Bina
ryin
put 4
Bina
ryin
put 5
Bina
ryin
put 6
Bina
ryin
put 7
Bina
ryin
put 8
L+(M
2)
L+(M
1)
L+ L– L+ L– L+ L– L+ L+ TxD
MT
8B1
6B1
7B2
8B2
6B2
7B3
8B3
6B3
7B4
8B4
6B4
3D1
4D1
3D2
4D2
3D3
4D3
3D4
4D4
3C1
4C1
3C2
4C2
3C3
4C3
3C4
4C4
6A3
6A1
6A2
5B1
5B3
5B4
5B2
5A1
5A3
5A4
5A2
6D1
6D3
6D4
6D2
5D1
5D2
5D3
5D4
4A3
4A4
64 63 68 67 66 71 70 69 86 85 84 87 88 89 90 91 92 93 94 95 96 43 44 45 46 47 48 19 18 17 74 99 100
75 72 97 98 73 20 22 23 21 24 25 49 50 76 77
13 10 14 11 31 1 5 2 6 3 7 27 28 53 54 55 56 57 58 59 61 62 78 79 80 81 82 83 4 8 37 38 15 16 51 52 26
2B1
3B2
2B2
3B3
2B3
3A1
3A2
2A1
2A2
1A1
1A2
1C1
1C2
8A2
8A1
8A4
8A3
7A2
7A1
7A4
7A3
8D2
8D1
8D4
8D3
7D2
7D1
7D4
7D3
1D1
1D2
2C1
2C2
4B1
4B2
4A1
4A2
RxD
MR
V V V V � � � N a b k iL1 L2 RE E L1 L2 L3
RE�
E� V
= >
<
7U
M512
�
� VE
R E
V
< T
RIP;
>T
RIP
f 1f 2
coup
ling
to c
ontro
l uni
t
coup
ling
to c
ontro
l uni
t
V
Bloc
k
> <
�
L+
L–
Bloc
k
> <
f
Coup
ling
� >
< 2
syst
em
Generator Protection
Siemens LSA 2.5.3 . February 199710
Dimension drawings in mm
Fig. 77XP2040–2 housing (for panel flush mounting and cubicle mounting)
Front view Side view Panel cutout
206.5180
221
7.313.2
255.
8
245
266
231.5
30 29.5
1.5
5.4
225
220
244
172
10
Fibre–opticinterface
Diam. 5 or M4
Diam. 6
Fig. 87XP2040–1 housing (for panel surface mounting)
260
27 29.526
6
71Z
280
344
234
219
Fibre–optic interface
126
1.539
40
Cutout 20 x 60(without paint)
10051 75
5025
76
7.5
. . . . .. . . . .
. . . . .. . . . .
Front view Side view Detail Z:
Generator Protection
Siemens LSA 2.5.3 . February 1997 11
Conditions of Sale and Delivery
Subject to theGeneral Conditions of Supply and Deliveryfor Products and Services of theElectrical and Electronic Industryand to any other conditions agreed uponwith the recipients of catalogs.
�
The technical data, dimensions and weights are subject to change unlessotherwise stated on the individual pagesof this catalog.
The illustrations are for reference only.
We reserve the right to adjust the pricesand shall charge the price applying onthe date of delivery.
Export Regulations
In accordance with present provisions ofthe German Export List and the US Com-mercial Control List, export licences arenot required for the products listed in thiscatalog.
An export licence may however be requi-red due to country–specific application ofthe products.
Relevant are the criteria stated in the de-livery note and the invoice.
Subject to change without notice.
Trademarks
All product designations used are trade-marks or product names of Siemens AGor of other suppliers.
Dimensions
All dimensions in this catalog are given inmm.
Siemens online!
The Power Transmission and DistributionGroup can also be found in the Internet:
http://www.ev.siemens.de
Responsible for
Technical contents: Dr. Hans–Joachim Hermann,Siemens AG, EV S V13, Nürnberg
General editing: Roland Reichel/Claudia Kühn–Sutiono,Siemens AG, EV S SUP22, Nürnberg/EV BK T, Erlangen
Conditions of Sale and Delivery � Export Regulations � Trademarks � Dimensions
A 9.91 a
Generator Protection
Siemens LSA 2.5.3 . February 199712Siemens Aktiengesellschaft
BereichEnergieübertragung und -verteilungGeschäftsgebiet SekundärsystemeP. O. Box 48 06D-90026 Nürnberg
Order No.: E50001-K5752–A131-A2–7600Printed in GermanyKG K 0297 2.0 SD 12 En 321515 6101/U527
PowerTransmissionand Distribution