Plz help me about equipment selection in Sub station

[iamrohan]

Hello all,

I have just joined crazy engineers.

Guys can anybody tell me in any substation what are the factors or steps for selection of any equipment like Circuit Breaker, islolator etc..

For example: There is 3 phase transformer the rating is 15 MVA, 33 kV / 440 V, Percentage impedence is 0.5 %. Then what is the rating of Circuit Breaker to be used for this. Plz if possible give formula and steps. Can assume any data if required. Also plz suggest any web about this.

I need it urgently....plz help me......

Thanks...

Rohan....

[sauravgoswami]

hey give me 2 days, i will get the details for you..