calling all electricians

[shaunkad]

I ran into a problem at work last night day shift look at me like I was smoke dope. I have a 480 step down transformer on the infeedI have 480 across the legs both 277 to ground the secondary I have 2 115 taps and 1 230  volt tap I have trouble with the 230 across the legs I have 230 one leg to ground is 200 the other is 50. I say replace they say can't be that.

mods feel free to delete

can any point me to a good forum non christmas lights to post these questions

[steve_hirst]

First I would say to backtrace your ground and make sure that its a good ground. I had an issue once at a jobsite that was much like this one and it turned out that the transformer didn't have a good ground and that gave it alot of flex in the output voltage. If I remember right I had a hot on the lower leg that was shorted to ground and that was becoming the transformers ground refernce. this making the breaker not trip either. once I found the bad ground and fixed it, the breaker tripped and I found the short.

[n1ist]

I agree with Steve; sounds like an open or high resistance ground on the secondary side.
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/mike