Siemens NGG series moulded case circuit breakers is a compact, industrial design, thermal magnetic high performance MCCB. The NGG series is designed to be used as incoming main and branch breakers in distribution systems. The NGG can be independently mounted on DIN rail or held in place by mounting screws. The NGG series has an over centre toggle mechanism that is trip free and uses repulsion contact arm construction. Therefore, should a short circuit or tripping condition occur, the contacts are forced apart and the breaker cannot be held closed by means of the handle.
