7UM512 Generator protection relay (Version V3) · PDF fileplemented by 7UT51 differential protec- ... 7UM512 Generator protection relay ... Generator Protection Siemens LSA 2.5.3

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�


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.


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



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).


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)



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.




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

ÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Overcurrent time protection (ANSI 51)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Current �>Trip delay, resetting delayReset ratio (settable)Response timeUndervoltage seal-in V<Excitation hold time during undervoltageReset ratio


0.1 x �N to 8 x �N0 to 32 s0.9 to 0.99Approx. 40 ms20 to 100 V0 to 32 s1.05

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Over/undercurrent protection (ANSI 51/37)


Current �><Trip delay, resetting delayReset ratio for �>

for �<Response time


0.05 to 8 A0 to 32 s0.951.05Approx. 40 ms

ÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

DC voltage protection (V = ><)(ANSI 64 DC)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Voltage V = ><Trip delay, resetting delayReset ratio V = >

V = <Response time for operating state 1

0


0.1 to 8.5 V0 to 32 sApprox. 0.981.1<60 ms <200 ms

ÁÁÁÁ


Overvoltage protection (ANSI 59) (single phase)


Voltage V>, V>>Trip delay, resetting delayReset ratioResponse time


30 to 180 V0 to 32 sApprox. 0.98Approx. 50 ms

ÁÁÁÁ


Undervoltage protection (ANSI 27)(single phase, or optionally frequency-dependent)


Voltage V<Trip delay, reset delayReset threshold (function of V–f characteristic)Response time


20 to 140 V0 to 32 s2 to 6 V above response valueApprox. 50 ms

ÁÁÁÁÁÁ


Frequency protection (ANSI 81) ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Number of stepsFrequency f1, f2Trip delay, reset delayReset differenceResponse timeUndervoltage blocking V<Reset ratio of the blocking


240 to 65 Hz0 to 32 s0.1 HzApprox. 120 ms40 to 100 V1.05

ÁÁÁÁ


Active power protection (ANSI 32)(reverse power protection) ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Active power | P |> (with reference to SN)Trip delay, reset delayReset ratioResponse time


1 to 120 %0 to 32 s0.9 or 0.5 % of SN� 190 ms

ÁÁÁÁ


Reactive power protection(ANSI 32 VAR)(underexcitation protection)


Reactive power | Q |> (with reference to SN)Trip delay, reset delayReset ratioResponse time


1 to 120 %0 to 32 s0.9 or 0.5 % of SN� 190 ms




Technical data (continued)

Setting ranges (continued)ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Unbalanced–load protection (ANSI 46)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

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


3 to 30 %0 to 32 s100 to 2 500 s70 to 99 %

10 to 80 %0.950 to 32 s�60 ms

ÁÁÁÁÁ


Stator earth-fault protection (ANSI 64)


Displacement voltage Vearth>Current �earth>Angle of the directional straight lineReset ratio Vearth / �earthTrip delay, reset delayResponse time


5 to 120 V2 to 100 mA0 to 360°0.7/0.950 to 32 s�60 ms

ÁÁÁÁÁÁ


Rotor earth-fault protection (ANSI 64R)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Alarm stage RAlarm<Tripping stage RTRIP<Reset ratioTrip delay, reset delayResponse timePermissible rotor-earth capacitance


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)


Response tolerances under nominalconditions


CurrentVoltagePowerTimes


3 % of the setting value3 % of the setting value0.3 % of SN or 3 % of the setting value10 ms


Operational measured values ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

VoltageCurrentPowerPower factorPhase angleUnbalanced load Reverse current

OvertemperatureDC voltageFrequency


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


DisplaysInputs


LED displays on the front of the unitOptocoupler, for 24 to 250 V DC Current consumption independent of voltage


168approx. 2.5 mAÁÁÁÁÁÁÁÁÁÁ


Construction


For panel surface mountingWeight approx.

For panel flush mounting, cubicle mountingWeight approx.

Degree of protection acc. to EN 60 529


in housing 7XP20 40–112 kgin housing 7XP20 40–210.5 kgIP 51




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




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





Fig. 6Connection diagram for the 7UM512 generator protection relay (Version V2), from state of development EE

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7

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Alar

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Bina

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Bina

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Bina

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Bina

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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

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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:



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


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

7UM512 Generator protection relay (Version V3) · PDF fileplemented by 7UT51 differential protec- ... 7UM512 Generator protection relay ... Generator Protection Siemens LSA 2.5.3

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