What are differences Dy11 and Dy5 for a Transformer?

[jonos]

Dear everybody,

Would you like to explain me about:
1. Dy11 and Dy5 connection in a transformer?
2. What are differences both of them?

Thank you for your attention and explanation.

Regards,
Jonos

 

[RalphChristie]

D = delta connected winding
Y = wye connected winding

Capital letter = HV winding
Lower case letter = LV winding

Number = equivalent phase shift between primary and secondary, based on a clock dial (5 = five o'clock, or 150° lagging, 11 = eleven o'clock, or 30° leading)

Just remember, phase shift depends on phase rotation.
Dy11 vector group for phase rotation 1-2-3 becomes Dy1 for phase rotation of 1-3-2

see: thread238-11381

Hope it helps
RCC

 

[busbar]

A very Spartan description of transformer-vector groups is pages 15-16 of

http://www.cooperpower.com/Library/pdf/S150301.pdf

Effectively, the Y-winding sets are 180° out of phase from each other—id est, “6 hours” on the clock face.

 

[Sett]

Thats Correct.

But, what is the diferent betwen both winding Dy11 and Dy5 (im talking about physicals form of the transformer winding).

Regards.

 

[jonos]

Thanks everybody, but would you like to explain about the connection Dy11 and Dy5?
Where can I get the drawing/reference about that?

Regards
jonos

 

[busbar]

jonos, please (re)read the links provided. Your question has been answered.

 

[GusD]

To Jose Henriquez.
The physical differences of the 2 secondary windings,each hooked up as single STAR .There are no differences,the out of phase condition is created by the connection of output leads H1/2/3s and X1/2/3.Magnectics will do the rest.
Thanks
GusD

 

[RalphChristie]

Jonos:

http://www.riedel-trafobau.de/english/pdf_eng/in_general/explanation.pdf

See last page (pg 5) for some drawings

RCC

 

[jonos]

To Everybody,
Thank a lot for your information and explanation.
Rgs,
Jonos