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.

for any load, what happen if we use the cable rating above its normal rating

2 Answers  

At what factor resistance r of a conductor depends?

0 Answers  

what u meant of power plant?

5 Answers  

what is the use of piston rings in the engine used for a generator...........

0 Answers  

How can we reduce the reactive power consumption of your 12.5 MVA power transformer.

4 Answers  

why transformer ratings are taken in 11kv 22kv 33kv but not in 10,20,30kv

5 Answers   ushacomm,

What happen if a 18 watt fluorescent tube is used on 36watt choke,which one damaged or not damaged, if damaged why that damaged?

2 Answers   Bharat ITI,

What we change frequency from transformer. yes or no

3 Answers   Intas,

What is VVVF Drive ?

3 Answers  

how to calculate generator capacity?(kva)

2 Answers   SMEC,

why the transformer secondary voltage is more than the load end voltage like t/f 11KV/433V for 415V(terminal voltage)

4 Answers  

(In MEP services) HVAC in AC Plant room what else can we provide if the chiller is not considered?

0 Answers