Could someone tell me once in for all what if any kind of signature you should see on a good arrestor and what on a bad one. I was under the assumption that there would be no heating on a good arrestor. I have 18KV MOV arrestors and I've measure anywhere from 2C to 20C. I always try to scan these on cooler damp days. The signature covers the whole arrestor but not connections to ground or input just the insulator body of the arrestor.
Posted by maintenance-tips at April 15, 2004 01:41 PM