ABB SACE Emax 2 First And Second Opening Release For Circuit Breakers YO Series

The opening and closing releases enable the circuit-breaker to be controlled remotely.
Opening is always possible, while closing is available only when the closing springs of the operating mechanism are loaded and the circuit-breakers is ready to close.
The releases operate by means of minimum impulse current duration time of 100 ms.
Furthermore, they can operate in permanent service.
In this case, if opening command is given by means of the opening release, the circuit-breaker can be closed by de-energizing the opening release and, after a time of at least 30 ms, by controlling the closing.
The circuit breaker operating mechanism has an anti-pumping function that ensures safety and reliability.