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Old 05-14-2013, 05:05 PM
jcb19 jcb19 is offline
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Default 3 phase conversion between delta and star

When converting from a star load to a delta load, becuase the phase and line currents in star are the same thing, to convert to delta does the line current stay the same and to get the phase current do you divide by sqrt(3) and add 30, Or does the phase current in star become the phase current is delta and do you then multiply by sqrt (3) and subtract 30?
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Old 05-15-2013, 10:28 PM
WBahn WBahn is offline
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Draw a diagram of three wires coming in to a box and inside that box put a star load. Identidy the line and phase voltages and currents.

Then draw a diagram of three wires coming in to a box and inside that box put a delta load. Identidy the line and phase voltages and currents.

Now identify which things have to be the same in order for the outside world to not be able to distinquish between the two boxes.

Now determine the relationships between the things that do not have to be the same.
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