Section 11 Secondary system supervision11.1 Current circuit supervision CCSSPVC IP14555-1 v511.1.1 IdentificationM14870-1 v5Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberCurrent circuit supervision CCSSPVC - 8711.1.2 Functionality M12444-3 v10Open or short circuited current transformer cores can cause unwanted operation ofmany protection functions such as differential, earth-fault current and negative-sequence current functions.Current circuit supervision (CCSSPVC) compares the residual current from a threephase set of current transformer cores with the neutral point current on a separateinput taken from another set of cores on the current transformer.A detection of a difference indicates a fault in the circuit and is used as alarm or toblock protection functions expected to give inadvertent tripping.11.1.3 Function block M12436-3 v9CCSSPVCI3P*IREF*BLOCKFAILALARMIEC13000304-1-en.vsdIEC13000304 V1 EN-USFigure 133: CCSSPVC function blockSignal ISIREF must be connected in the configuration.1MRK 505 394-UEN A Section 11Secondary system supervisionLine differential protection RED650 2.2 IEC 283Technical manual
