Emax Low voltage air circuit-breakers - ABB Download Center

Earthing switch with making capacity2Earthing switch with making capacity - MTPThis version is based on the moving part of the corresponding withdrawable circuit-breaker(without overcurrent trip units) and the top or bottom isolating contacts, which are replaced withconnections that short circuit the phases to earth through the circuit-breaker. The earthing switchis available with top or bottom isolating contacts.The earthing circuit is dimensioned for a short-time withstand current equal to 60% of the maximumlcw of the circuit-breaker from which it is derived (IEC 60439-1).The earthing switch is inserted in the fixed part of a withdrawable circuit-breaker to earth the topor bottom terminals before carrying out inspection or maintenance operations in safe conditionson the external circuit. It should be used in cases where residual or recovery voltages can occurin the installations to be earthed.1SDC200067F00011SDC200068F00011SDC200069F00011SDC200070F00012/10ABB SACE