Why does an S-Flex circuit breaker trip when starting in bypass mode?

FAQ 검색

Issue:

The S-Flex attempt to start in BYP will trip the breaker immediately.

Product Line:

S-Flex

Environment:

Models with bypass feature

Cause:

High current

Resolution:

The circuit breaker (CB) has an instantaneous trip feature. This protects circuits from short circuit or other very high currents.
In BYP mode, the motor is started with full voltage applied. The power circuit will experience a high inrush current, typically 6-10 times the motor FLA. If this initial inrush exceeds the CB instantaneous setting, it will trip immediately. The CB instant setting should be adjusted to a point above the normal inrush current for the application.
See the attached file, excerpt from the S-Flex Instruction Bulletin, 30072-451-83.

“If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:
Frequently Asked Questions - Schneider Electric (se.com)

If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us at drive.products.support@se.com to create a case with our Technical Support Team.

If you are not located in North America, please contact your local Customer Care Center for assistance:
Support | Schneider Electric Global (se.com)“