Regulators types A and B 2

[wesles24]

Hello,

I am trying to find a good description as to when you should use a type A and type B regulator in your substation. I understand that just about everything is the same except the internal connections are different as far as the shunt winding being on the primary side for type A and then on the load side for type B, the excitation will then be constant in type B, but I have found nothing explaining when to use type A or type B.
Any information or useful links will be appreciated, I am also looking for any good information on regulators and how they are used.

Thanks!

 

[7anoter4]

I didn’t read [ or study] all IEEE publications around this subject. But I think you may get some information in [for instance] the following:
Distribution System Modeling and Analyzing by William H. Kersting
This could be the link:

https://books.google.co.il/books?hl...ype A and type B substation regulator&f=false

 

[7anoter4]

This link does not open chapter 7, I see. So these are other more links. I think it will be better.:

http://www.cooperindustries.com/con...urces/library/225_VoltageRegulators/77006.pdf

http://www.cooperindustries.com/con...s/library/225_VoltageRegulators/W22510022.pdf

 

[wesles24]

Thank you, I found the link on how they work, but that first link was very helpful!
Thanks for the help!

 

[prc]

The national standard for Voltage Regulators is IEEE C57.15-2009 which was issued by IEC as a dual logo standard - IEC60076-21 Power Transformers- Standard requirements ,terminology, and test code for step voltage Regulators-in 2011.These are auto-transformers with a shunt winding and full series winding as tapped winding.
In Type A regulator incoming voltage comes across a fixed shunt winding and hence core excitaion varies.In type B, shunt winding act as out put voltage. Core excitation remains constant as the tap is changed in accordance with incoming voltage.
This type of regulators, it seems used only in US? Surprisingly in India these are never used and all transformers are provided with tap changer on HV for HV variation.Nowadays more and more resistor type on-load tap changers are provided in distribution transformers.