12.2 Apparatus control12.2.1 FunctionalityThe apparatus control function APC8 for up to 8 apparatuses is used for control andsupervision of circuit breakers, disconnectors and earthing switches within a bay.Permission to operate is given after evaluation of conditions from other functions suchas interlocking, synchrocheck, operator place selection and external or internalblockings.In normal security, the command is processed and the resulting position is notsupervised. However with enhanced security, the command is processed and theresulting position is supervised.The switch controller SCSWI initializes and supervises all functions to properly selectand operate switching primary apparatuses. Each of the 8 switch controllers SCSWImay handle and operate on one three-phase apparatus.Each of the 3 circuit breaker controllers SXCBR provides the actual position statusand pass the commands to the primary circuit breaker and supervises the switchingoperation and positions.Each of the 7 circuit switch controllers SXSWI provides the actual position status andpass the commands to the primary disconnectors and earthing switches and supervisesthe switching operation and positions.12.2.2 Switch controller SCSWI12.2.2.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberSwitch controller SCSWI - -12.2.2.2 FunctionalityThe Switch controller (SCSWI) initializes and supervises all functions to properlyselect and operate switching primary apparatuses. The Switch controller may handleand operate on one three-phase device.Section 12 1MRK 502 048-UEN AControl338Technical manual
