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Technical > Home Improvement > Poco infrastructure question

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ArgMeMatey

join:2001-08-09
Milwaukee, WI
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reply to John Galt

Re: Poco infrastructure question

said by John Galt:

Is that delta...??

Or are you referring to a "high leg" system?

aka Corner-Grounded Delta. I just looked that up because I'm no expert. One transformer with three secondary taps. One tap (B) grounded. So A & C are 240V to ground.

Advantages:
- cheaper 2-pole gear can be used all down the line
- there are only three conductors just like split phase 240V
- B phase does not have to be (and CANNOT be) switched or fused.

But this is not what the OP has.

Also I ran across something on Wikipedia that mentioned that the old power station at Niagara Falls was two-phase. Maybe that was where I'd heard that before.
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to forum · permalink · 2013-01-13 19:52:31 ·


whizkid3
Premium,MVM
join:2002-02-21
Queens, NY
kudos:9

4-wire, 3-phase 208/120 from a wye secondary on a transformer. Tie into any two phase conductors and the neutral, and you have single-phase 120/208. (Regardless of what they were doing in Niagara Falls ages ago.)

to forum · permalink · 2013-01-13 22:39:17 ·
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