Technical FAQs

Ask a Question

How does a thermal-magnetic trip unit work?

Issue:
How does a thermal-magnetic trip unit work?

Product Line:

Environment:

Cause:

Resolution:
Thermal-magnetic trip units trip under short circuit conditions instantaneously, with no intentional delay. Below the instantaneous trip current, they have a delay established to protect conductors while allowing momentary current surges such as for motor starting and transformer inrush. In some cases they have adjustable instantaneous trip current settings.


CTA-ID : 8725
Was this helpful?
What can we do to improve the information ?