Help Distribution Voltages
Help Distribution Voltages
(OP)
I'm trying to visually assess distribution circuits. How can I visually determine the voltage of the circuit?
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Help Distribution Voltages
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RE: Help Distribution Voltages
How accurately are you trying to determine the voltage level? And for what purpose?
RE: Help Distribution Voltages
Have you considered just asking the local utility?
RE: Help Distribution Voltages
Then there's the utility where I used to live that started out life as a delta 12kV system and slowly converted to a wye 21kV system. The absence of a neutral meant 12kV, but you had to know that it really didn't have a neutral; I saw examples where a former 3 phase 12kV circuit became 2 phases and neutral of 21kV with the neutral on the phase insulator it had used back when it was a phase conductor. In that case, the real clue was whether the primary of the pole mounted transformers had two bushing "that" size or one bushing twice "that" size and one clamp.
RE: Help Distribution Voltages
Even the bushings might not help, as a Delta-to-Wye conversion like you describe likely re-used the transformers, now connected line-to-ground. Just because the H2 bushing is fully insulated does not prevent it from being connected to neutral, which may still be at the top of the pole since the neutral may have been a former "hot".
We have done it that way when we are doing a quick conversion.
THAT is why you need to consult the utility to be sure.