# Questions tagged [y-to-delta]

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### Y-Δ transform proof using superposition

In the Wikipedia page and in every book they prove the transformation by equaling the equivalent resistance between any pair of terminals while disconnecting the other node. https://en.wikipedia.org/...
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### Which branches should I convert for this star-delta transformation?

For those who can't see the image: SO there is an outer delta with two 1 ohms and a 2 ohm. Then an inner Y with three 2 ohms. Within the Y, there is a delta formed on it's two lower legs with three 1 ...
155 views

### Why there is not a sqrt(3) factor between rated currents on the delta-wye transformer?

When calculating the rated current on either side of a delta-wye transformer, we will use the following equation: $$I_{LL}= \dfrac{S_{3\Phi}}{\sqrt3*V_{LL}}$$ Since this same equation is used for ...
39 views

### Star to delta transformation circuit

Is it possible to use star-to-delta transformation on this specific circuit below? If it is possible, can someone give me a hint on how to do it? I tried to do delta-to-star transformation and got the ...
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### Problem in star delta starter in air compressor

I am a beginner in electrical engineering. I am trying to understand how motors are connected in a star and delta system. I studied the star delta starter from this link. It describes the connection ...
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### Wye to delta 3 phase

Can someone please explain to me the following. For the last part, why did they use the Van to find Vab( secondary line voltage of the delta). I did it and my magnitude matches the solution but the ...