Weird power supply
Weird power supply
(OP)
I was working in northern Indiana and ran across a power supply that I had never seen before. Its a 3 phase 480 system across the legs, but leg to ground it measures 390, 360, and 140. I thought they had a power problem but a local electrician said thats a normal supply for the area. My question is 2 part. 1) how is this system created and 2) can I safely put a vfd on it. Thanks for you help.






RE: Weird power supply
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: Weird power supply
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: Weird power supply
RE: Weird power supply
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: Weird power supply
RE: Weird power supply
RE: Weird power supply
A grounded delta typically gives two low voltages to ground and one high. Hear we have two high voltages and one low.
respectfully