An existing dc three wire system is to be converted into a 3phase 4 wire system by adding a fourth wire equal in cross section to each outer of the dc system. Assuming the same supply and load voltages to neutral and balanced conditions find the extra power at unity power factor that can be supplied by the ac system.

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An existing dc three wire system is to be converted into a 3phase 4 wire system by adding a fourth wire equal in cross section to each outer of the dc system. Assuming the same supply and load voltages to neutral and balanced conditions find the extra power at unity power factor that can be supplied by the ac system.
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