Peebee, Most of the new single phase transformers (50-75 Kva) padmounts the neutral (HO) is internally bonded to the can. There is always a bond from the can to the XO. So the concentric neutral, and ground have to bonded together in that circumstance.
The transformers in this situation have...
rbul, Thanks I know what should be done, but I am just a middle man trying to make better someone elses mess.
We have discussed isolating the HO from the frame and providing a seperate ground.
My question with this is what could be some of the down falls. IE if the #6 should fail, potential...
Dan, Each phase is a radial that daisy chains to 4 single phase 2400/120-240 transformers.
The transformer set up is the same at all twelve of the transformers, 4 transformers per leg.
First here is some back ground. 3-phase 4160v system. Each phase feeds 4 2400/120-240 transformers.
The original system had a direct burried conductor with a bare concentric neutral (no jacket). It was a 25 year old system.
The system was upgraded with new 1/0 Al tape shielded cable in...
