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 meant by power factor correction?

5 Answers   Aspire,

I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?

0 Answers  

in catridge heeter  watts =110, 260 v ,  i checked in multimeeter meeter shows 50 ohms but oms law r=v square /w  260*260=67600, and 67600/110=614.5 ohms  how to caluclate exact ohms in heetre s 

2 Answers  

Details about Flux Compensated magnetic Amplifer starter for motors

0 Answers  

what is the function of statics switch in ups and tell me parts

0 Answers   Dalkia,

Can Anyone suggest the Standards (IEC or IS) for selecting copper current density?

0 Answers  

how to calculate the mesh earth network resistance in such substation, is there any recommended resistance values with references , thanks!

0 Answers   SRES,

Why DG set rating in KVA

13 Answers   Crompton Greaves,

Is it possible to increasing the real power generation by reducing the reactive power in power generation plants

3 Answers  

Is it reuired to use house service barcket for 31/2 core 300 Sq.mm cable,if the distance between pole & shop is around 2 mtrs only or can I hang the cable with GI support in air? upto what size of cable GI serrvice btacket is necessary?

1 Answers   HAL,

How do the synchronizing lamps indicate the correctness of phase sequence between existing and incoming alternators?

0 Answers   VECL,

It is advisable 2 use auto-transformer if transformation ratio is-a)110KV/11KV,b)230kv/110kv,c)110kv/66kv,d) 400kv/230kv

2 Answers