Sepam - HV/MV Protection and control units (ENG) - Trinet

OperationA closing request made locally or remotely by the user is maintained in Sepam2000for a time T10 and triggers closing of the coupling device when the intendedsynchronism conditions are met.Special featuresSepam 2000 de-activates the closing request when a fault occurs or when anintentional order interrupts the request.The gap checking function is active by default but may be de-activated forÒgeneratorÓ Sepam 2000 by setting the KP34 parameter to 1 or by the remotecommunication impulse contact KTC58 (reactivation is possible by setting KP34back to 0 or via the KTC59 contact).The checking by absent voltage mode is inactive by default but may be activated,only when the gap checking function is activated, by setting the KP35 parameter to 1or via the remote communication impulse contact KTC56 (de-activation is possiblevia the KTC57 contact).The synchro-check activation and de-activation functions are interlocked with theposition of the Òlocal/remoteÓ selector switch wired to input I18.Local closing control via I14 is prohibited when the selector switch is in the remoteposition.Changeover of the selector switch from the local position to the remote position, for atime of T10, triggers interruption of the request if synchro-check is not activated inremote mode.Monitoring of the voltages at either end of the breaking device is carried out via twoinputs with normally closed contacts which allow LV circuit breaker fault contacts orstriker fuse contacts or voltage transformer drawout contacts to be connected.Annunciation managementSetting of the T8 time delay guarantees a minimum closing time for the O33annunciation output in ÒbusbarÓ Sepam 2000.A closing request triggers the appearance on the display unit of the blinkingmessage ÒSYNCHROÓ.For generator Sepam 2000, should the closing request fail, the message ÒVOLTAGEGAPÓ is displayed or when the value of the voltage gaps is within the set limit, themessages ÒANGLE GAPÓ and ÒFREQ. GAPÓ are displayed.Any interruption in the closing request triggers the appearance of the messageÒSTOP SYNC.Ó, accompanied by the message which goes with the event that hascaused the interruption.A voluntary shutdown via input I13 or via KTC33 during the closing request does notgenerate any messages other than ÒSTOP SYNC.Ó.The ÒTaÓ time delay may be used to anticipate the breaking device closing commandwhen the networks to be coupled are moving dynamically toward the synchronismconditions.The setting of ÒTaÓ depends on the coupling device closing time and thecharacteristics of the networks to be coupled.CommissioningUse the pocket terminal or communication:v set the time delay T10 (the default setting is 200 ms),v set the synchro-check function parameters (F181: Syn. CheckÕ).For the operating mode with voltage absent, see ÇMetering and protection functionsdocumentationÈ..Control and monitoring functions1/33