Technical FAQs

Ask a Question

Can primary breakers be exchanged in Mini-Power Zone Transformers for lower amperage ratings?

Issue:
Mini Power Zone (MPZ) primary main breaker sizing

Product Line:
LV Transformers

Environment:
Applies to Mini Power Zone (MPZ) Transformers by SquareD/Schneider Electric

Cause:
Main breakers for Mini Power Zone (MPZ) Transformers are sized per NEC 450-3b

Resolution:

The primary mains supplied with an MPZ can be replaced by a lower ampacity breaker of the same voltage & AIC ratings and style. Care should be taken not to install a new, lower ampacity breaker which will allow nuisance tripping due to Transformer inrush.


CTA-ID : 254

Was this helpful?
What can we do to improve the information ?