P631 up to P634Transformer DifferentialProtection DevicesVersion P631 -304 -403/404 -606 ffVersion P632 -304 -403/404 -606 ffVersion P633 -304 -404/405/406 –606 ffVersion P634 -304 -403/404 –606 ffTechnical Data SheetThis document does not replace the Technical Manual P631-304-403/404-606 ff // P632-304-403/404-606 ff //2P631_P632_P633_P634_TechnicalDataSheet_EN_06_CP633-304-403/404-606 ff // P634-304-403/404-606 ffApplication and scopeThe differential protection devices of the MiCOMP63x series are intended for the fast and selectiveshort-circuit protection of transformers, motors,generators and other installations with two, threeor four windings, respectively.The MiCOM P63x series provides high-speedthree-system differential protection using a triple-slope characteristic and two high-set differentialelements in combination with transformer inrushrestraint, overfluxing restraint and through-stabilization. Amplitude and vector groupmatching is done just by entering the nominalvalues of transformer windings and associatedCTs.For ring bus and breaker-and-a-half applications avirtual winding can be defined for which thecurrent measuring inputs are based on the vectorsum of currents from two or three freely selectablewindings.In addition many supplementary protectivefunctions are incorporated in the devices.Protective functions which are available severaltimes are freely assignable to the windings.The P63x provides four setting groups for easyadaptation to varying system operation conditions.All main functions are individually configurableand can be disabled or enabled by the user asdesired. By means of a straight-forwardconfiguration procedure, the user can adapt thedevice flexibly to the scope of protection requiredin each particular application. Due to the powerful,freely configurable logic of the device, specialapplications can be accommodated. P631P632P633P63487DIFFDifferential protection2 wind.2 wind.3 wind.4wind.87GREF_xRestricted earth fault protection-23350DTOC_xDefinite-time O/C protection223351IDMT_xInverse-time O/C protection223349THRMxThermal overload protection112227/ 59UOver/undervoltage protection-11181O/UfOver/underfrequency protection-11124V/fOverexcitation protection-111CTSCurrent transformer supervisionOptionOptionOptionOptionMCM_xMeasuring circuit monitoring2234LIMIT / LIM_xLimit value monitoring2233LOGICProgrammable logic1111COMMx2Communication interfaces, IRIG-BOptionOptionOptionOptionINP / OUTPBinary inputs and outputs(max. number)4 / 1434 / 2240 / 3034/ 22MEASI /MEASOAnalogue inputs and outputs(2 x 20 mA outputs, 20 mA inputand RDT input)-OptionOptionOptionMeasuring inputsPhase currents2 x 32 x 34 x 34x 3Residual current orstar-point current-233Voltage-111Functions overview Figure 1:Functional Overview P631_P632_P633_P634_TechnicalDataSheet_EN_06_C3P631-304-403/404-606 ff // P632-304-403/404-606 ff //P633-304-403/404-606 ff // P634-304-403/404-606 ffIn addition to the features listed above, as well ascomprehensive self-monitoring, the followingglobal functions are available in the MiCOM P63xseries differential protection devices:>Parameter subset selection(4 independent parameter subsets)>Measured operating data to support the userduring commissioning, testing and operation>Operating data recording(time-tagged signal logging)>Overload data acquisiton>Overload recording(time-tagged signal logging)>Fault data acquisition>Fault recording(time-tagged signal logging with fault valuerecording of the phase currents of eachwinding and, depending on the designversion, of the neutral-point current of eachwinding and of the voltage). Figure 2:Simple Function Selection by Mouseclick 24V/f Metering LIM_1 Overload rec.Recordingand DataAcquisition Self Monitoring Transformer DifferentialProtection P63x Fault rec. COMM2 Communikationto SCADA/ substation control/ RTU/ Modem ...via RS485 oder optical fibre linkusing IEC 60870-5-101, -103, Modbus, DNP3,Courier, UCA2 COMM1 LOGIC optional or specific always available 27/59V LIM_2 81f MEASO MEASI LIM_3 IRIG-B IY,b IY,a IY,c V IP,a IP,b IP,c IP,d Ivirtual 87DIFF MCM_1 MCM_2 MCM_3 MCM_4 49THRM1 49THRM2 51IDMT1 51IDMT2 51IDMT3 50DTOC1 50DTOC2 50DTOC3 87GREF_1 87GREF_2 87GREF_3 CTS Figure 3:Function Diagram P631-304-403/404-606 ff // P632-304-403/404-606 ff //4P631_P632_P633_P634_TechnicalDataSheet_EN_06_CP633-304-403/404-606 ff // P634-304-403/404-606 ffThe protection devices MiCOM P631, P632, P633and P634 are of modular design. The plug-inmodules are housed in a robust aluminum caseand electrically connected via an analog and adigital bus printed circuit board.The nominal currents or the nominal voltage,respectively, of the measuring inputs can be setwith the help of function parameters.The nominal voltage range of the optical couplerinputs is 24 to 250 V DC without internalswitching. Optional there are also ranges withhigher switching thresholds available.The auxiliary voltage input for the power supply isa wide-range design with a nominal voltage rangeof 48 to 250 V DC and 100 to 230 V AC. Anadditional version is available for the lowernominal voltage range of 24 V DC.All output relays are suitable for both signals andcommands.The optional PT 100 input is lead-compensated,balanced and linearized for PT-100 resistancethermometers per IEC 751.The optional 0 to 20 mA input provides open-circuit and overload monitoring, zero suppressiondefined by a setting, plus the option of linearizingthe input variable via 20 adjustable interpolationpoints.Two freely selected measured variables (cyclicallyupdated measured operating data and storedmeasured fault data) can be output as a load-independent direct current via the two optional0 to 20 mA outputs. The characteristics aredefined via 3 adjustable interpolation pointsallowing a minimum output current (4 mA, forexample) for receiver-side open-circuit monitoring,knee-point definition for fine scaling and alimitation to lower nominal currents (10 mA, forexample). Where sufficient output relays areavailable, a freely selected measured variable canbe output in BCD-coded form via contacts.Control and Display>Local control panel>17 LED indicators,12 of which allow freelyconfigurable function assignment>PC Interface>Communication interface (optional)Information InterfaceInformation exchange is done via the local controlpanel, the PC interface and 2 optionalcommunication interfaces.One of the communication interfaces conforms toIEC 60870-5-103, IEC 60870-5-101, DNP 3.0 andModbus and is intended for integration of MiCOMP63x with substation control systems.The 2nd communication interface (COMM2)conforms to IEC 60870-5-103 and is intended forremote setting access only.Clock synchronization can be achieved using oneof the protocols or using the IRIG-B signal input.
P631_P632_P633_P634_TechnicalDataSheet_EN_06_C
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P631-304-403/404-606 ff // P632-304-403/404-606 ff //
P633-304-403/404-606 ff // P634-304-403/404-606 ff
Main functions
Main functions are autonomous function groups
and can be individually configured or disabled to
suit a particular application. Function groups that
are not required and have been disabled by the
user are masked completely (except for the
configuration parameter) and functional support is
withdrawn from such groups. This concept
permits an extensive scope of functions and
universal application of the protection device in a
single design version, while at the same time
providing for a clear and straight-forward setting
procedure and adaptation to the protection task
under consideration.
Differential Protection
Amplitude Matching
On the basis of the primary transformer currents,
the MiCOM P63x differential protection devices
can be flexibly adapted to the reference currents
of the protected object. Amplitude matching is by
means of a straight-forward input of the reference
power common to all windings plus the nominal
voltages and the nominal transformer currents for
each winding. The resulting reference currents
and matching factors are automatically deduced
by the device and checked for compatibility with
the internally allowed value ranges.
Vector Group Matching and
Zero-Sequence Filtering
Matching of the MiCOM P63x series differential
protection devices to the vector group of the
protected object is via a straight-forward input of
the relevant vector group identification number.
The mathematical formula to be applied to the
measured values is automatically selected
internally according to the relevant vector group
and zero-sequence filtering is taken into account
simultaneously. For special applications, zero-
sequence filtering may be deactivated separately
for each winding.
Tripping Characteristics
The tripping characteristics of the differential
protection device has two knees (see Figure 4).
The first knee is dependent on the setting of the
basic threshold value Id> and is on the load line
for single-side feed. The second knee of the
tripping characteristic is defined by a setting.
Above the user-selected differential current level
Id>>>, the restraining current is no longer taken
into account.
Characteristic
for single-side feed
I
R,m2
m
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