In a Circuit how the MCB and Fuse ratings are calculated.
And shall the fuse follws the MCB or it is otherwise?

Answer Posted / pragnesh

IF we take an Example,

5.5kw Load,

I= Doble than Load = 11A,

MCB Must has More than 11A,

& Fuse Must than 1.5 Tmes more than MCB.

Is This Answer Correct ?    189 Yes 98 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

How colour picturetube works & how many year it will works.

1580


In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

1712


Pls explan the OLR setting in VCB at HT yard

2186


Circuit diagram of tube light without starter using electrical choke

3654


Whether should be the oil level in OCTC transfomer? It should be upto winding immersed completely or should be upto tap changer s/w? How it will affect the performance of the transformer. Rating may be 33KVA

1407






How out of step protection relay works?

1788


WHAT IS DEAD END IN PROTECTION?

2013


i want to run 11kv star connected motor in 6.6kv with delta connected throught inverter, is it possible?

1618


why does connected a indutor with mnsformeretering core of current transformer ?

1645


how we decide scurt (disc) of insulator with respect to kv rating

2921


How shall i select the value of capacitor or inductor in a system?

1452


what happen if drive input fail momentry at 48.5 HZ frequency?

1511


what r the checklist while installing a 380 kva DG set

3324


What do you mean by lighting transformer?

623


What happen in ups if phase reverse?

1691