Specifying Circuit Breaker for 11kV and above.

[ballenden]

Hi,

Could anyone point me to documentation (preferably free to download?) that would assist me in specifying a circuit breaker on 11kV to 132kV networks? Your help is appreciated.

B.

 

[rbulsara]

Thats a wide range. 11kV to 69kV is medium voltage class.
Voltage above 69kV will be a different high voltage class breakers.

You can contact manufactures or their web site as start. GE, SQ D, Cutler Hammer (formerly Westinghouse), Siemens all will be OK for up to 69kV.

For breakers of higher voltage level GE, Siemens, ABB etc could be a source. Someone else with experience in higher voltage class will chip in, I hope. As usula this assumes that you are workig along with some experienced engineers.

 

[Kiribanda]

ballenden,

From the voltage range you have specified it sounds like you are in the IEC world, where 11 kV is MV and 132 kV is HV.

Therefore in my opinion,you should first read IEC 62271-100 which is the IEC standard for circuit breakers above 1000 V.

Hope this helps.

Kiri

 

[ballenden]

Kirabanda,

You're right, I'm in an IEC country. Thank you for the info. I'll try to track these down, but these IEC documents are expensive. Are there any alternative to obtaining these?

b.

 

[Kiribanda]

ballenden,

If you are in the engineering business, you should have all major IEC and ANSI standards in hand. So you should put pressure on your employer to purchase them. Otherwise, you have to spend your money and buy them eventhough they are expensive, because still you are responsible to complete the work assinged to you.

A lot of work by the experts in the subject is involved in
making these standards. So do you think that it is reasonable to make these standards available freely to the end user?

Good luck!

Kiri