# Single Phase to three phase power conversion

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Joined: 2014-04-01

Please, can anyone clarify how to arrive at the total power consumption from the below details?
400V, 3ph+N, total load is 17.92kW
230V, 1ph+N, total load is 16.06kW

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Joined: 2015-01-07

haunats,

Hornet

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Joined: 2015-05-14

Our power system is 3-phase, four wire 400/230V (we're using diesel generator as power source). If I have single-phase loads (L-N) of 10kVA in line A to neutral, 12kVA in line B to neutral, and 10kVA in line C to neutral and a three-phase load of 5kVA, how can I compute the total current so I know what size main circuit breaker I need?

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Joined: 2015-01-07

You need a 350A Main Breaker. The loads are as follows: Ian = 43.5A, Ibn = 52.2A, Icn = 43.5A and I-3phase = 144.34A.

Breaker Size = 144.34A X 1.25 + 43.5A + 52.2A + 43.5A = 320A

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Joined: 2015-05-17

We think that the size of Main Breaker is 150 Amps, because the 3-phase load is 8.02 Amps instead 144,34 Amps.

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That may be a question only the manufacturer can answer. Any electronic or motor

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That depends on how many chucks a woodchuck chucks, if a woodchuck could chuck wood.

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With the delta connection, line voltage IS phase voltage.
I would say 250V.

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To understand the NEC, it is necessary to know how to read the NEC. I do not mean

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