an IEEE or ANSI standard phase shift of 30 degrees
an IEEE or ANSI standard phase shift of 30 degrees
(OP)
Can anyone point me
that why is there an IEEE or ANSI standard phase shift of 30 degrees between a transformer primary and secondary
that why is there an IEEE or ANSI standard phase shift of 30 degrees between a transformer primary and secondary






RE: an IEEE or ANSI standard phase shift of 30 degrees
RE: an IEEE or ANSI standard phase shift of 30 degrees
RE: an IEEE or ANSI standard phase shift of 30 degrees
But, if there is, it is always n*120 +/-30 degrees, with a possible 180 degrees added. Simply because the voltage vectors are off by +/-30 degrees if the primary is delta connected and the secondary is wye connected.
Having said that, it is time to go back and say that lots of different phase angles can be had. Especially if one of the windings is a Z winding.
But 30 degrees is very common.
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: an IEEE or ANSI standard phase shift of 30 degrees
That's news to me. How do you build a standard two-winding delta-wye transformer with no phase shift between the delta and wye windings?
RE: an IEEE or ANSI standard phase shift of 30 degrees
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: an IEEE or ANSI standard phase shift of 30 degrees
The transformer phase shift results because the phase voltage from a delta winding is in phase with the winding, and the phase voltage from wye connected windings is the vector sum of the voltages of two windings that have a 120 degree phase displacement.
respectfully
RE: an IEEE or ANSI standard phase shift of 30 degrees
waross,
Yes, that's my understanding as well. But unless you're doing something really special, there will be a phase shift between the H and X bushings on a delta-wye or wye-delta unit.
RE: an IEEE or ANSI standard phase shift of 30 degrees
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: an IEEE or ANSI standard phase shift of 30 degrees
RE: an IEEE or ANSI standard phase shift of 30 degrees
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: an IEEE or ANSI standard phase shift of 30 degrees
There is available phase shifting transformers design that could vary the phase angle in a wide range the primary with respect to the secondary output.
RE: an IEEE or ANSI standard phase shift of 30 degrees
RE: an IEEE or ANSI standard phase shift of 30 degrees
It's just a matter of how you connect winding taps internally in the transformer. I believe in Europe it is common to have Dy5. Here in North America we usually have Dy1 or Dy11.
RE: an IEEE or ANSI standard phase shift of 30 degrees
----------------------------------
Sometimes I wake up Grumpy.
Other times I just let her sleep!