Thread: How do you get 320 volts.
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Doug Miller Doug Miller is offline
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Default How do you get 320 volts.
In article , wrote:
On Fri, 17 Jul 2009 17:51:50 -0700 (PDT), stan
wrote:
[...]
There were also IIRC some scrapped three pole breakers.
Just trying to recall the voltage ratios between our domestic 115/230
volts and three phase voltages. Can anybody help with a quick
tutorial? Such as; 345 volts is to say 208 volts as 115 is to ????


Sounds like a 600 volt nominal 3 phase system

If we use 208 and 117, the ratio is 1.77, and 1.77X345 = 613.

Actually, the ratio for three-phase voltage is the square root of three =
1.73205...

208 / sqrt(3) = 120.09
345 * sqrt(3) = 597.6
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