Re: LT SWITCHBOARD

#12952
AWESOMEFLINT
Participant

Sorry ppl,

 

   Went outta country ! life kept me busy !!

Back on !!

 

So Vinoth, here is the deal !…..I didnt understand your calculations :p !! no offense bro….. just keep it simple yaar.

Anyway !!

Bout your “breaking capacity” ….lets learn from ABC…to alpha beta….

My bro (wiki) says….: breakin capacity is the current that a fusecircuit breaker, or other electrical apparatus is able to interrupt without being destroyed or causing an electric arc with unacceptable duration. So far so good.
 

NOW u gotta select the value of breaking capacity….which is dependent on  

1. TRANSFORMER POWER. 

2. SYSTEM VOLTAGE

thats all.

 

So, do this 

( transformer power x 1000 / 1.732 x system voltage ) = this gives your breaking capacity in kA 

 

=>  MVA x 1000/1.732 x 440 [generally the system voltage is 440 V. for LT].

 

Bam !! u have your breaking capacity of ACB/MCCB/SFU or wotever !! Enjoy

 

Regards

FLINT !

P.S : PLEASE CORRECT ME IF I AM SMALLEST BIT OF WRONG !!