I am working on a pivot that runs on 480V. Everything on the pivot is working fine but i wired in a pigtail with a thermal overload and contactor to run an injection pump (1 hp motor that injects fertilizer). The injector keeps tripping out so i decided to measure voltages to make sure i...

Hi there, I deal with a lot of low voltage and controls, so my confidence shrank a bit when i discovered that my voltmeter in fact wasn't broken, and i was dealing with corner grounded 480. And furthermore that the 120 in the old equipment is actually from a local transformer. This is part of an...

Has any ever used a 3 phase 480 delta to power 3 240 loads, If so how did you hook up the load to the delta and how did you protect the loads if one of the loads across one delta opened? this is a non-motor load. If any has any suggestion. please post them Thanks, Vaughn