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Princeton,IN | Always,always,always when checking voltage on three phase, CHECK IT FIRST PHASE TO PHASE. If you have three voltages measured phase to phase, things are good
When you measure phase to ground, and see a zero on your voltmeter, your mind starts working in overdrive, and you may imagine problems you don't have. REREAD paragraph one.
If you had a three wire,three phase system without the ground (straight power)you would have voltage registered three times when checking phase to ground. REREAD paragraph one. BELIEVE paragraph one.
If you had straight power( a three wire, three phase system with no neutral), and you developed an accidental ground on one phase, it would continue to function and you would never know the difference, until
1). You checked voltage phase to ground, OR
2). You developed an other ground on either of the two OTHER phases.
Situation two, you would recognize from fire, smoke, and no power.
Now:
One transformer=single phase
Three transformers=three phase
TWO transformers=three phase, also.
Don't worry about two transformers. You ain't an engineeer, and I ain't either! I are a LINEMAN. Don't worry if it causes the engineeers problems,(it might), or if the power company is cheap(they are).
YOUR only worry is: will the power bank do the work I need it to do? Tell the power company straight up what you plan/need to do, and tell them if you have any growth/changes planned, also.
As to the copper tube in the fuse panel: You don't fuse your ground wire do you? It is confusing. It is grounded, but it is also a phase.
Also:
Do not confuse a two transformer bank with a three transformer bank with a grounded phase system with a straight power system.
REREAD paragraph one.
Confused is what I was when grounded phases where explained to me, and when it was explained how to build them. I remember thinking "you want me to do WHAT?"
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Electrical :Grounded 3 phase
