PROTECTION MiCOM P139 - Schneider Electric

1 The MiCOM p139 is a cost effective one-box solutionfor integrated numerical time-overcurrent protectionand bay broad spectrum of PROTECTION functions enablesthe user to cover a wide range of applications in theprotection of cables and overhead lines,transformers and motors. In addition, numerouscontrol functions are available. Thanks to theprovision of four setting groups, the p139 device isreadily adapted to varying conditions in control functions are designed for the control ofup to six electrically operated switchgear unitsequipped with electrical check-back signalinglocated in the bay of a medium-voltage substation ora non-complex high-voltage station. For theselection of the bay type the p139 is provided withover 250 predefined bay types and allows downloadof customized bay intuitive user interface and the variouscommunication interfaces allow easy control andmonitoring of the switchgear units, simple andcomprehensive setting as well as access toreadings of extensive recordings.

2 Numerousintegrated communication protocols, including IEC 61850, provide interfacing to almost any kind ofsubstation control or SCADA system. Furthermorethe integrated InterMiCOM PROTECTION interfaceprovides direct end-to-end communication betweentwo PROTECTION standard 19'' modular case of the p139 with auser-selected number of plug-in modules provide aflexible solution for easy integration of the devicesinto the substation. The p139 is available for flushmounting as well as wall-surface mounting andprovides the option of detachable Benefits PROTECTION and Control in one box Huge number of predefined bay types 1A/5A software setting Multiple communicationprotocols and interfaces,including IEC 61850 Detachable HMI optionAREVA T&DMiCOM p139 Feeder Management and Bay ControlPROTECTIONP139 in case 40 TEP139 in case 84 TEAPPLICATIONO vercurrent PROTECTION and control unit MiCOM P139provides a wide range of PROTECTION and scope of functionalities for p139 depends on theavailability of CT and VT inputs fitted in the.

3 Further options are provided for variousprotection and control requirements for exampleincreasing the number switchgear units from 3 to 6 forcontrol and monitoring and selection of automaticsynchronism FUNCTIONSThe following global functionsare generally availablein all devices:>Parameter subset selection(4 alternative setting groups)>Metering>Operating data recording >Overload recording incl. overload data acquisition>Ground fault recording incl. ground fault data acquisition>Fault recording of all CT/VT inputs and binaryevents incl. fault measurands ( fault location).2>3 MiCOM p139 provides a wide range of PROTECTION and control OverviewP139P139with withCTs CTs/VTs50/51 P,Q,NDTOCD efinite-time o/c PROTECTION , three stages, phase-selective51 P,Q,NIDMT1 Inverse-time o/c PROTECTION , single-stage, phase-selective51 P,Q,NIDMT2 Inverse-time o/c PROTECTION , single-stage, phase-selective67 P,NSCDDS hort-circuit direction determination- 50 SOTFS witch onto fault PROTECTION 85 PSIGP rotective signaling 79 ARCAuto-reclosure control (3-pole) 25 ASCA utomatic synchronism check-option67W/YNGFDSSG round fault direction determination - (wattmetric/neutral admittance)

4 67 NTGFDT ransient ground fault direction determination-option37/48/49/MPMotor PROTECTION 49LR/50S/6649 THERMT hermal overload PROTECTION 46I2>Unbalance PROTECTION 27/59/47V<>Over-/Undervoltage PROTECTION - 81f<>Over-/Underfrequency PROTECTION - 32P<>Directional power PROTECTION - 50 BFCBFC ircuit breaker failure PROTECTION CBMC ircuit breaker monitoring MCMONM easuring circuit monitoring LIMITL imit value monitoring LOGICP rogrammable logic DEVC ontrol and monitoring of up to 3 resp. up to 6 switchgear unitsresp. optionresp. optionCMD_1 Single-pole commands SIG_1 Single-pole signals ILOCKI nterlocking logic COUNTB inary counter COMMx2 comm. interfaces, protectionoptionoptioncomm. interface InterMiCOMIECIEC-61850-interfaceoptionop tionIRIGBIRIG-B inputoptionoptionINP /Binary inputs / output relays 40 / 2640 / 26 OUTP(maximum number)MEASI/Analog I/O optionoptionMEASO(2x 20 mA outputs, 20 mA input, RTD inputs)MAIN FUNCTIONSMain functions are autonomous function groups andcan be individually configured or disabled to suit aparticular application.

5 Function groups that are notrequired and have been disabled by the user aremasked completely (except for the configurationparameter) and functional support is withdrawn fromsuch concept permits an extensive scope of functionsand universal application of the device in a singledesign version, while at the same time providing for aclear and straight-forward setting procedure andadaptation to the PROTECTION and control task PROTECTIONFor the overcurrent PROTECTION of the three phase currents, the residual current and the negative-sequence current the p139 provides definite timeovercurrent PROTECTION andinverse timeovercurrentprotection with a multitudeof tripping operate values of all overcurrent stages can be dynamically changed ( under cold load pickupconditions). Additionally, some of the phase andnegative-sequence current stages can be stabilizedunder inrush conditionsif residual and negative-sequence current stagesaffect the general starting signal.

6 This effect can besuppressed if DIRECTIONDETERMINATIONDue to the short-circuit direction determinationfunction, the p139 can be used as directional time-overcurrent PROTECTION the individual overcurrent stages the user canselect whether the stage shall be forward-directional,backward-directional or non-directional. Directiondetermination is performed in separate measuringsystems for the phase current and residual currentelements, P,Q,NDTOC51 P,Q,NIDMT151 P,Q,NIDMT2 MCMON85 PSIG27 / 59 / 47V<>81f<>49 THERM50 SOTF67W/YNGFDSSILOCKTGFDM eteringLOGICI nterMiCOMLIMITO verload flt. SCADA / substation control / RTU / modem ..via RS485 or Fibre Opticsusing IEC 60870-5-101, -103, Modbus, DNP3,Courier, RJ45 or Fibre Optic using IEC 61850 RecordingandDataAcquisitionSelfMonitorin gFeeder Management and Bay Control Unit p139 Fault I2>CBM67 P,NSCDD32P<>25 ASC79 ARCwith VT inputs37/48/49/50S/66 MPControl/Monitoring ofup to 3 or optional up to 6 switchgear unitsfurther optionsalwaysavailableCOMM1 COUNTCMD_1 SIG_1 MEASOMEASIIRIGBIVVrefSimple function selection by mouseclick(Description of ANSI code nos.)

7 See Functions Overview) FUNCTION DIAGRAMSWITCH ON TO FAULTPROTECTIONC losing of a circuit breaker might inadvertently lead toa short-circuit fault due to a maintenance ground clampnot yet removed, for example. The function 'switch on tofault PROTECTION ' provides for an undelayed protectivetripping during a settable time after a manual closecommand has been PROTECTIONFor the PROTECTION of directly switched inductionmotors with thermally critical rotor, the followingspecially matched PROTECTION functionsareprovided:>Recognition of operating mode>Rotor overload PROTECTION using a thermal motorreplica>Choice of reciprocally quadratic or logarithmic trip-ping characteristic>Inclusion of heat dispersion processes in the rotorafter several startups>Separate cooling periods for rotating and stoppedmotors>Startup repetition monitoring with reclosure blocking >Control logic for heavy starting and PROTECTION oflocked rotor>Loss of load protectionUsing the optional RTD inputs, direct monitoring ofthe temperaturesof the stator windings and thebearings can be set up with the >5 THERMAL OVERLOADPROTECTIONP139 provides thermal overload PROTECTION for lines.

8 Transformers and stator windings of highest of the three phase currents serves to tracka first-order thermal replica according to IEC temperature of the cooling medium can be takeninto account in the thermal replica using the optionalRTD inputs or the optional 20 mA user has a choice of using a thermal replica on thebasis of either relative or absolute over- and undervoltage PROTECTION allows the multi-stage evaluation of directly measured andinternally calculated four-stage frequency PROTECTION can be operatedas pure over- and underfrequency monitoring as wellas combined with differential frequency gradientmonitoring (df/dt) for system decoupling applicationsor with medium frequency gradient monitoring ( f/ t)for load shedding POWERPROTECTION The directional power PROTECTION monitors the activeand reactive power limits and detects power drop andreversal of DIRECTIONDETERMINATIONFor the determination of the ground-fault direction inisolated or Peterson-coil compensated power systemstwo proven methods are provided:>wattmetric or admittance method(analysis of steady-state signals)>Transient method(analysis of transient signals)(optional).

9 100806040200m in %321ttOverload memoryReclosure blockingPermissible number of startups3 successive startupsOverload memory and startup counter of motor protectionMiCOM p139 for rapid and selectivefault clearance in your power DATA INPUTS AND OUTPUTSFor the acquisition of an externally measured variableor the output of measured datas p139 providesoptionally a 0 to 20 mA input and two 0 to 20 mAoutputs. A settable scaling allows a simple adaption of the input resp. outputs ranges ( 0 to 10 mA, 4 to 20 mA).Up to 10 optional resistance temperature detectorsare provided for direct temperature on the set operating mode, the RTD'soperate in parallel or the RTD's can be subdivided intoregular inputs and reserve INTERFACEINTERMiCOMO ptional InterMiCOM allows high performancepermissive and blocking type unit PROTECTION to beconfigured, plus transfer of any digital status informationbetween line ends.

10 Intertripping is supported too, withchannel health monitoringand cyclic redundancychecks (CRC) on the received data for maximummessage provides eight end-to-end signal bits,assignable to any function within a MiCOM relay'sprogrammable failsafestates can be set in case of INTERFACESI nformation exchange is done via the local controlpanel, the PC interface and twooptionalcommunication first communication interface has settable protocolsconforming to IEC 60870-5-103, IEC 60870-5-101, DNP , Modbus and Courier (COMM1) or providesalternatively protocol conforming to IEC 61850 (IEC)and is intended for integration with substation 2 NDcommunication interface (COMM2) conformsto IEC 60870-5-103 and is intended for central settingsor remote synchronizationcan be achieved using one ofthe protocols or using the IRIG-B signal BREAKER MONITORINGThis function provides the user with several criteria forthe assessment of circuit breaker wear:>Calculated number of remaining operations basedon the CB wear curve>Mechanical operations count>Interrupted currents sum (linear and squared)>Accumulated current-time integrals of tripsFor each of these criteria, a signaling threshold can beset by the CONTROLThe auto-reclosing control (ARC) operates in three-phase mode.