# 3 phase conversion between delta and star

Discussion in 'Homework Help' started by jcb19, May 14, 2013.

1. ### jcb19 Thread Starter New Member

Feb 20, 2013
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0
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°?

2. ### WBahn Moderator

Mar 31, 2012
23,384
7,096
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.