The trip circuit supervision relays SPER 1C1 and SPER 1C2 are used for supervising important control circuits such as circuit-breaker and disconnector control circuits and signalling circuits in power electrical installations. Generally one supervision relay is needed per circuit to be supervised. If several branches of a circuit are to be supervised, the required number of relays can be connected to the same control circuit.
The supervision relays SPER 1C1 and SPER1C2 are mechanically designed to suit the COMBIFLEX system. The both types differ from each other as to the supply voltage range and the minimum supervision circuit voltage. If a rail-mounted or surface-mounted, not COMBIFLEX, supervision relay is required, please refer to the type SPER 1B1 C4.