Earth Leakage on a 3 phase Motor | Model Engineer
I have been checking out my stock of 3 phase motors using an Altivar VFD. All ran fine, except one dinky little AEI 3 phase motor. It must be at least 50 years old and has never been out of its original box. The Altivar would barely get it moving before switching off with an earth leakage message. Tried it a couple of times and the second time it tripped the supply RCD for the VFD. OK a leaky winding to earth, not too surprising. The motor is wired in delta, Before binning it, I tried meggeri...
Source: model-engineer.co.uk