Answer Posted / ammar
we have to calculate the rated current of the load
connected to the circuit breaker from the power equation
p=√3.V.I.cosθ
then we can decide which is the suitable rating for the CB.
Is This Answer Correct ? | 10 Yes | 3 No |
Post New Answer View All Answers
What are chief characteristics of state-space method and its techniques ?
How earthing of switchgear system to be done.
What is electrical diversity factor in electrical installations?
We have 5 Distribution sections with variable loads&We have 3 Gensets(500kva,380kva&250kva) our total load is between 400kva to 600kva. so how could we connect 3gensets.
In case of generator when we consume more power produces by it why load on generator increase and starts sound more. and how it is adjusted..
What are the advantages of hydropower?
how to store the thunder power?
How does a transformer contribute towards the widespread popularity of ac system over dc?
WHAT IS SUBSTATION & ACCORDING TO VOLTAGE HT,EHT SUBSTATION EXPLAIN IT
How does an induction motor start?
how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size
what are the advantage and dis-advantage of 3 phase 4 wire energy meter?
What is the Nyquist criterion regarding control systems?
what about GD square and its important for motor design?
This is reqd for a 1MW Solar power plant..We have 2DC outputs from the solar panels Connected to 2INVERTOR panels.. Output from invertor is 3ph,280v,500kva,50hz.These are connected to individual ACB.This has to be stepped up to 11KV ,1250KVA SYSTEM.Now can I use (1) one more ACBTO GIVE A COMBINED OUTPUT OF 1000KVA,280V & STEP UP THE OUTPUT BY USING a single two winding 3 ph transformer 11kv/1250kva. or (2)use the two outputs and connect to one three winding transformer of above rating..Pls suggestwith details.