Short-circuit protective devices

[cecseabee]

I have an instaneous trip (adjustable trip) circuit breaker with only short-circuit protection. Would the incident energy calculations be the same - even though the circuit breaker provides no overcurrent protection?

 

[Jraef]

I have an instaneous trip (adjustable trip) circuit breaker with only short-circuit protection. Would the incident energy calculations be the same - even though the circuit breaker provides no overcurrent protection?

Essentially, yes. Incident energy is based on short circuit or ground faults, not continuous overload current. But what would you be using that in? Hopefully it's part of a factory built motor starter, right?

 

[cecseabee]

Essentially, yes. Incident energy is based on short circuit or ground faults, not continuous overload current. But what would you be using that in? Hopefully it's part of a factory built motor starter, right?

Yes, essentially a motor starter bucket with this CB inside, overload relay, etc included inside the bucket.