Line voltage

[jimwalker]

just how high can we accept a 277/480 feed from poco ? is 290/505 too high ? Will it cause electronic ballast a problem ?

 

[ron]

Re: Line voltage

I understand that plus or minus 10% is acceptable. Your reading is approx 5%.

 

[jimwalker]

Re: Line voltage

Perhaps it will drop after we get a real load.Transformer only running about 10% load for a while

 

[ron]

Re: Line voltage

Definitely when you draw more load, the internal impedance of the upstream transformer will reduce the incoming voltage.

 

[bcfoster]

Re: Line voltage

290/505 is within limits and would drop as more of a actual load is placed on it.

But if you still have issues with it I would contact the local poco (TECO I believe still carries all of Tampa) and ask one of their guys.