Trip circuit monitoring relay SPER 1B1 C4

DIN railplug-in

Continuous monitoring of circuit-breaker trip circuits and other essential control circuits The trip circuit supervision relay SPER 1B1 C4 is 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 SPER 1B1 C4 is composed of a standard 11-pin plug-in relay unit and a corresponding terminal socket for rail-mounting. ABB trip circuit supervision relays are also available in COMBIFLEX design, please see products SPER 1C1 and SPER 1C2. Scope • Relay for man or backup circuit supervision Product benefits • Immediate information about faults Product features • Continuous monitoring of circuit-breaker trip circuits and other essential control circuits • Preset operate time preventing unwanted alarm signals at circuit-breaker operation • Indication of relay operation with LED indicator on the front panel and output relay • Detects bad contact, contact welding and auxiliary voltage failures in the supervised circuit