ABB SACE Tmax XT / Emax 2 Undervoltage Release For Circuit Breakers YU Series
Brand :
ABB
Caution
Product Description
This allows the circuit-breaker to open when the release is subject either to a power failure or a voltage drop.
As prescribed in the standards, opening is guaranteed when the voltage is between 70% to 35% Un.
After tripping, the circuit-breaker can be closed again if the voltage exceeds 85% Un.
When the undervoltage release is nor energized, neither the circuit-breaker nor the main contacts can be closed.
A remote-controlled emergency opening command can be generated by connecting an opening button to the YU.