Short circuit rating of Switchgears - Terms

Nick Parker:

Hi OMS,


Isn't all this parameters elated to the circuit breaker?


When someone says, what is the short circuit rating of the switchgear assembly (the whole structure), what does it usually refers to?

Is it the busbar rating?

Is it the Main Incomer circuit breaker breaking capacity?

Is it the whole assembly withstand capacity?

If the short circuit rating is for the whole assembly, then it's the short circuit rating for the whole assembly - which may or may not be a conditional short circuit rating compared with a protective device etc


Regards


OMS

Nick Parker:

Hi OMS,


Isn't all this parameters elated to the circuit breaker?


When someone says, what is the short circuit rating of the switchgear assembly (the whole structure), what does it usually refers to?

Is it the busbar rating?

Is it the Main Incomer circuit breaker breaking capacity?

Is it the whole assembly withstand capacity?

If the short circuit rating is for the whole assembly, then it's the short circuit rating for the whole assembly - which may or may not be a conditional short circuit rating compared with a protective device etc


Regards


OMS