The E-T-A 4930 utilises an integral bi-stable linear motor to switch the contacts. Its ON/OFF status will synchronise with the 4120/483 circuit breaker, matching the status of that controlling circuit breaker. If power is applied to a de-energised 4930, it will adopt the same switching status as the control circuit breaker; and if the RCCB trips in the event of a load circuit fault, the control circuit breaker will trip, thus providing a visual indication of the fault. In the event of a short circuit, the switching circuits of the RCCB will not cycle between ON and OFF.
The new E-T-A 4930 Remote Control Circuit Breaker is available in a range of current ratings from 5A to 100A and can be supplied with or without auxiliary contacts which can provide external signalling. It is temperature compensated: it features a bi-metal actuator which trips the mechanism within a specified time under overcurrent conditions.
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