Emax Low voltage air circuit-breakers - ABB Download Center

Auxiliary Contacts5) Auxiliary contactsAuxiliary contacts are available installed on the circuit-breaker,which enable signalling of the circuit-breaker status. The auxiliarycontacts are also available in a special version for applicationwith rated voltages Un < 24 V (digital signals).CharacteristicsUn In max T125 V DC 0.3 A 10 ms250 V DC 0.15 AUn In max cosϕ250 V AC 15 A 0.3The versions available are as follows:51SDC200145F00015a-5b) Electrical signalling of circuit-breaker open/closedIt is possible to have electrical signalling of the status (open/closed) of the circuit-breaker using 4, 10 or 15 auxiliary contacts.The auxiliary contacts have the following configurations:– 4 open/closed contacts for PR121 (2 normally open + 2 normallyclosed)– 4 open/closed contacts for PR122/PR123 (2 normally open +2 normally closed + 2 dedicated to trip unit)– 10 open/closed contacts for PR121 (5 normally open + 5 normallyclosed)– 10 open/closed contacts for PR122/PR123 (5 normally open+ 5 normally closed + 2 dedicated to trip unit)– 15 supplementary open/closed contacts for installation outsidethe circuit-breaker.The basic configuration described above can be modified bythe user for normally open or normally closed indication by repositioningthe faston connector on the microswitch.When 10 open/closed contacts for PR122/PR123 are required,the zone selectivity and PR120/K unit are not available.Reference figure in electrical circuit diagrams: Q/1÷10 (21-22)1SDC200146F00015/12ABB SACE