Browse FAQs

Does a circuit breaker close if the UVR (MN) is not energized?

Published date: 18 May 2020

Issue:
Does a circuit breaker close if the UVR (MN) is not energized?

Product Line:
Masterpact, Powerpact, Legacy Circuit Breakers

Environment:
UVR not energized.


Resolution:
No. This release instantaneously opens the circuit breaker when the supply voltage drops below a value between 35% and 70% of rated voltage. If the release is not energized, the circuit breaker cannot be closed (either manually or electrically). Any attempt to close it will have no effect on the main contacts. Closing is possible when the release voltage reaches 85% of its rated value.

Was this helpful?

What can we do to improve the information ?

Can't find what you are looking for?

Reach out to our customer care team to receive information on technical support, assistance for complaints and more.