HOW CIRCUIT BREAKER RATING CALCULATED?WHAT ARE THE
PARAMETERS CONSIDERED?

Answer Posted / jignesh

The C.B. rating r depend on load connected with it.
For three phase supply

I = KW/((ROUT3)*V*COS fi)

From we getting the current for given line then w easily
find C.B. rating with this current.

Is This Answer Correct ?    14 Yes 22 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is different between Difnit time and instatous over current relay

1972


What kind of preventive maintenance are there for transformer?

1779


what is mathed of check the D.C MOTOR 181 KW (ARMATURE AND FIELD) WHAT IS THE MATHED OF CHECK THE THYRISTOR MODULE (HIGH CURRENT)

1551


what is the power rating of CPU, CRT type moniter, LCD type moniter,scanner Approx.

1757


take 100kva DTR( delta/wye ), what ll happen if we connect 11kv to LT side instead of connecting to HT side? will the DTR behave as a step up transformer or something else????

1808






I am about to write exam in RRB bangalore for the post of section engineer.please provide me with previous exam questions

1662


why ahould you show client/engineer activities clearly on the project plan

2333


What is milivolt dop test in Busducts? What is its significance & procedure to do the test?

1572


I need the recommended size for a 3 phase transformer at 13.8 KV Primary and connected loads of 3000 kVA at 4200 volts and 2375 kVA @ 480 volts AC.

1496


Is there any relevant technique to produce power from light and heat energy of the sun simultaneosly from same rays of light?

1405


what is inverter and converter

1422


What is the main purpose of c.f.b.c.boiler

1251


How to design the earth grid for lightning protection in an industry

3693


DRAW ACIRCUIT DIAGRAM OF 100 KVA 415V/55-0-55V DELTA TO STAR TRANSFORMER

1595


hi, i have 3x200KVA and 2 x 80KVA UPS with battery bank of 150AH 68Nos. and 100AH 204Nos., i need to install AC either ductable or PAC type, so can you help me to calculate heat load and capacity of the AC to install.

2325