open delta connection
open delta connection
(OP)
why open delta connection causes 30 degree phase shift? can you explain this ? also is 30 degree phase shift obligatory or design issue in delta-wye connections?
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RE: open delta connection
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I think there are a couple of vector diagrams in there that may help clarifying the concept.
Cheers
Ramsi
RE: open delta connection
RE: open delta connection
There is a 30 degree phase shift inherent from the primary to the secondary of a wye/delta or delta/wye transformer or bank. It doesn't matter if the delta is open or closed.
It has to do with the phase angle between the line to line voltage and the line to neutral voltage in a wye system.
In a wye transformer, there is a 30 degree shift between the line to line voltage and the line to neutral voltage. The delta voltages are in phase with the line to neutral voltages.
An open delta has a similar phase angle between the primary and secondary.
Bill
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"Why not the best?"
Jimmy Carter
RE: open delta connection
Thanks for the clarification. I apologize for pointing to the other thread without reading through the same.
Ramsi
RE: open delta connection
Did you ever find that vector diagram? I am looking for the same information.
RE: open delta connection
Note: If the primary is we connected, the neutral point should be floating in a wye/closed delta connection.When one transformer is removed, the wye point of the remaining two transformers must be connected to the primary neural.
Vector diagram? Draw a closed delta vector diagram and remove one vector.
Bill
--------------------
"Why not the best?"
Jimmy Carter