rmonroe
Guest
R
We have some equipment that was rebuilt by an outside company. There is a three-phase 480-volt cabinet exhaust blow they installed rate at ½ HP. The only protection device that they installed is a three-phase circuit breaker rated at 1 amp. This exhaust motor is always tripping out and therefore they never run the exhaust blow. Correct me if I’m wrong, but I thought the circuit breaker was for short-circuit protection and the thermal overloads were for over-current protection. If I use my trusty Square D Motor Data Calculator I come up with a circuit breaker rated at 15 Amp and the thermal overloads rated at B1.45.
Is this correct?
Thanks
rmonroe
Is this correct?
Thanks
rmonroe