Why is 1.73 used in calculating 3 phase wattage?

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Offline tommya300

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Why is 1.73 used in calculating 3 phase wattage?
« on: 17/07/2010 01:17:09 »
3 phase electrical ... Watts = (V)(A) 1.73

Where did the 1.73 value come from? Why is it used?




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Offline Joe L. Ogan

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Why is 1.73 used in calculating 3 phase wattage?
« Reply #1 on: 17/07/2010 02:19:45 »
Je ne sais pas!  Thanks for comments.  Joe L. Ogan

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Offline tommya300

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Why is 1.73 used in calculating 3 phase wattage?
« Reply #2 on: 17/07/2010 02:37:33 »
Je ne sais pas!  Thanks for comments.  Joe L. Ogan

ta mz quzwa?

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Offline Geezer

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Why is 1.73 used in calculating 3 phase wattage?
« Reply #3 on: 17/07/2010 05:37:22 »
It's because the voltage between the phases is 1.732 times the phase to neutral voltage.

The value can be derived from vector analysis. It boils down to 2cos30 which equals 1.732 (which also happens to be √3)

There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline tommya300

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Why is 1.73 used in calculating 3 phase wattage?
« Reply #4 on: 17/07/2010 13:27:39 »
It's because the voltage between the phases is 1.732 times the phase to neutral voltage.

The value can be derived from vector analysis. It boils down to 2cos30 which equals 1.732 (which also happens to be √3)
Thanks Geezer