switching of capacitor by three individual pole breaker

[pukar12345]

Dear All,

I saw 145kV transmission system where switching of shunt capacitor is done by three induvidual pole circuit breaker replacing three pole ganged circuit breaker. What is the main reason behind this ?

in my opinion, main purpose is that when one phase of capacitor gets fault at that time only one phase trips and remaining two will be available in the system.
Am i right ? or please correct me.

Thanks for all in advance.

 

[Skogsgurra]

Could also be that it is easier to synchronize switching with voltage zero crossing to avoid heavy transients. Individual poles are easier to synchronize than poles with a common actuator are.

Gunnar Englund

http://www.gke.org

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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

 

[slavag]

Hi pukar12345 .
Please see attached link,

http://www.abb.com/product/db0003db...9e00443c21.aspx?productLanguage=us&country=CH

its include a Product guide of SwitchsyncTM Controller with a very good explanation of all electrical transient od caps switching.

Good Luck.
Slava