I need some advice on sizing and placing an overload in a star/delta circuit.
I have my own idea on how and where but just want second opinion.
The motor in question was wired up by me about 2 years ago and was working fine till the other day. it now trips the overload when the delta contactor pulls in.
So here goes.
- The motors plate shows delta symbol and says 31.5 amps.
- When I first wired the motor up 2 years ago, it came with an old star/delta starter(intregrated to machine) which I ripped out and replaced with new telemecanique gear.
- Does this motor definetly require star/delta starter.
- If so, what should the thermal overload be rated at and where should it be placed.
If you have any further questions please post them and I will answer.
I can't understand how it was working fine for 2 years and now is causing probs