I'm sad that I don't know this.
Which motor overloads actually OPEN the power circuit conductors when they trip?
Of course you run the OL contact in the coil circuit for the contactor to drop that out, but I'm asking specifically about whether the OL will open the power circuit itself as well. I don't know my basis, but for some reason my understanding was that some did, and some don't. Is this a NEMA vs IEC style thing? Is there a term for this type of OL? Am I crazy and none or all do?
I'm fairly certain that some OL relays are actually 100% useless if you don't drop out a contactor when they trip, but then there are things like manual motor starters that definitely do drop itself out when the OL function activates.
Which motor overloads actually OPEN the power circuit conductors when they trip?
Of course you run the OL contact in the coil circuit for the contactor to drop that out, but I'm asking specifically about whether the OL will open the power circuit itself as well. I don't know my basis, but for some reason my understanding was that some did, and some don't. Is this a NEMA vs IEC style thing? Is there a term for this type of OL? Am I crazy and none or all do?
I'm fairly certain that some OL relays are actually 100% useless if you don't drop out a contactor when they trip, but then there are things like manual motor starters that definitely do drop itself out when the OL function activates.