Overdutied Protective Devices and Catastrophic Failures

People seem to love to watch videos of electrical explosions. One type of failure is when a protective device is applied beyond its interrupting rating and catastrophically fails (explodes) when it has to interrupt a short circuit. Although this does not happen for every overdutied device, it could happen. That is the main reason for performing a short circuit study – to identify these types of deficiencies so they can be corrected.

So with that intro, here is this week’s question.

Have you/clients ever had an overcurrent device catastrophically fail when it interrupted a fault?
Yes
No

READ MORE