3 Phase Delta Winding Supplied With 3 Different AC Sources

What do you think happens?

Nothing if perfect phase alignment an amplitude, however if not perfectly phase aligned you would have issues depenent on voltage and available fault current, if considerably out of alignment, it was nice to know you.

Why?

Provided the three sources were exactly in phase, and all of equal voltage, it would be equivalent to connecting one phase of a three-phase supply to all three terminals, so nothing happens.

Bit of a pointless exercise, really.

Another lost and lonely soul has discovered the land of CR4.

what if voltage in not equal:....

Then (assuming the three sources share a common earth somewhere) there will be a potential difference across the windings, leading to current flow.

What happens next depends on how much current and what the winding is (which has not yet been specified).

what if wdg is a delta star 950 kva 415v/33kv tranformer...

Why do you want to know?

what will hapn nd what would be the output of transformer.

I repeat, why do you want to know?

What would happen if you had 4 separate sources of 1/2 phase power from alternate universes with a quantum phase shift caused by Commander Data being stuck in an inter dimensional portal while wrestling with his alter ego droid Lor?

Now it gets interesting, 33KV?

Are you connecting to the MV or LV side?

A schmatic would be helpful.

Is poster talking about the transformer being connected to 3 different power sources at the same time? This would usually cause blown fuses or something worse.

Or is poster talking about connecting to power line, then disconnecting and connecting to generator #1, then disconnecting and connecting to generator #2? This is done all the time.

Why would, connecting this to three individual sources cause blown fuses? It is inherently no differently then how a regular transformer gets powered. Or am I missing something?

I assume based on his question that there is no connection between the 3 sources on the primary. Otherwise... it could not be considered as 3 sources, it would be one three phase source.

The real question should be... what are the secondary voltages going to look like. The voltage levels in the secondary would depend upon if the secondary was delta or wye.

If it was wye... the secondary voltages would be dependent upon the turns ratio of the primary to the secondary and the instaneous voltage in each of the primary coils relative to each other.

If it was delta... the secondary voltages would be dependent upon the turns ratio of the primary to the secondary alone.

I think, "The real question should be" who is this joker, and does he really understand his own question, or is it failure to communicate?

• "...or is it failure to communicate"

Classic movie line from Cool Hand Luke...

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