Calculating KVA delivered on 3 phase feed

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The discussion centers on calculating the KVA delivered on a 3-phase feed for a building powered by a 600V supply. It is established that if the feed delivers 200A at 600V, this represents the maximum current available per phase, resulting in a total power capacity of 360 KVA. The calculation for power available to 120V and 208V loads is confirmed as 72 KVA, derived from the formula Power = 3 * 120V * 200A. The voltage supplied is clarified as 600V per phase, with 200A being the maximum current available.

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evang
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For a building powered by a 3-phase feed, I need to estimate the amount of power available to 120v & 208v loads in the building.

If the feed delivers 200A at 600v, is this 200A per phase (meaning 360 KVA total) or a third of that?

TIA.
 
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you have not clearly mentioned supply voltage. from where the 600v comes into picture?

assuming phase to ground voltage as 120 (phase to phase voltage 208) and load current as 200A
Power = 3 * 120V * 200A
= 72000 VA
= 72 KVA
 
Correct, the voltage supplied to the building is 600v per phase.
200A is the max current available on the 600v feed.
 

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