Answer / rajender mohan

The Busbar Rating specifies the maximum short circuit current it can see and operate, so you can put a breaker up to breaking capacity of busbar,
Ambience temprature has to taken into consideration while designing the LT Panel.

Answer / opselvaraj

Not neceesary but it is preferable to have the same rating
from operation/maintenance point of view.

Answer / anil jangra

KA rating of any switchgear is depending on fault level of connecting load,so it necessary to calculate the fault current of load than select the switchgear rating,as per my opinion the must be able to clear the fault without damaging it self and healty one feeder also.

Answer / pravin deshbhratar

yes, whatever fault current rating that we are maintaining
for the Incomer breaker same has to be maintained for
outgoing breaker also unless there is a stepdown
transformer in line. Because the fault level is calculated
on the basis of actual load of the substation that it is
going to carry out, so it is suggested that we have to use
the same KA ratiing for Incomer as well as the Outgoing
breaker.

Answer / mohammad farman khan

Not Necessary,depend upon your system means you are going
to use same KA rating for reactive power or normal power.if
you are using for reactive power then you hava to have same
KA rating of BB.however, you can check for normal load.

Answer / r.gunasekaran

Circuit breaker KA rating should be more than that bus bar
KA.

What Is HO factor in power selection

0 Answers   Wonderla Holidays,

How do i right a ladder diagram that has 1 actuator that performs a full stroke followed by a half stroke

0 Answers   Tata Motors,

1.main parts of generator? what is used A-check,B-check,C- check? 2.what is FM200 system in data centers? 3.difference between pac,ahu?

0 Answers   TATA,

how i meggar value of 11kv alternator winding.and with meggar.

1 Answers  

What is the difference between PLC & DCS?

1 Answers   Power Plant,

Why do we use center tap transformer that used with portable tools

0 Answers  

What are the raitings of Mcb,mccb and Acb in detail ??

0 Answers   Engineering Vision,

what are the main faults that occur in stabilizers? How they corrected and resolved ? Types of stabilizers ?

0 Answers  

dielectric strength of vacuum is greater than SF6 but for 132Kv uses sf6 breaker & for 33kV uses vaccum breaker why such a contradiction?

2 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

what is creepage distance in sub-station?

3 Answers   ABB,

what is cogging in motors?

1 Answers  

What is the Good Earth resistance value of G.I & Cu. Chemical Earthing & Normal Pipe Earthing?

0 Answers   ABC, Reliance Life Sciences, TCS,