For 415v,3phase,22kw rating of motor how to calculate MCCB rating

Question Posted / vijaya

2 Answers
11894 Views
Zigma Technologies, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

For 415v,3phase,22kw rating of motor how to calculate MCCB rating..

Answer / ucmed_king

Refer Manufacturer coordination chart for required rating and model of MCCB.

There is a thumb-rule though. Convert KW to HP (KW/0.75), multiply it by 1.5 gives you the rated current. Multiply it by 1.5 for breaker value.

Here's the coordinartion chart:-
http://powertips-elec.blogspot.in/2010/11/selection-charts-for-dol-starters-l.html

Is This Answer Correct ?

9 Yes

1 No

For 415v,3phase,22kw rating of motor how to calculate MCCB rating..

Answer / akash

39Amp Per Phase is the actual load, but you can be on safer using side using 50/63Amp MCCB.

Is This Answer Correct ?

6 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.

0 Answers

why do you want leave the company

2 Answers

why on axial hitting up of air blast on hydrogen produced in oil circuit breaker,temperature rises of the core of the arc?

0 Answers

WHAT WILL HAPPEN IF INPUT SUPPLY OF RCBO IS CONNECTED TO OUTPUT SIDE

2 Answers ABG Shipyard,

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?

13 Answers

what happens to the water pump if ground water level is slowly decreasing?our water pump is varying from no-load full-load due to this problem

0 Answers

WHAT IS THE COOLANTS IN TRANSFORMER?

7 Answers Bhel,

why the voltage level in transmission line are in multiple of 11kV, 22kV, 33 kV etc..( i.e., 220 V )?

4 Answers

I need to compare the energy consumption of an industrial machine before and after improving. Shall I compare the apparent power or the active power? I know usually factories use compensated capacitors (or other similar components) to compensate the reactive power, so if I use the apparent power, it's not the real power consumed.

2 Answers

some time we open engine breaker 8.0 MW load but plant not trip. and another time engine open 4.0 MW load engine trip why? individually engine breaker open & individually emergency stop why difference?

0 Answers

what is exact meaning of CT core saturation or simply saturation of core.

1 Answers

Power factor =1.000 at factory in supply. However, PF = 0.8 at motor end. Current = 100 Amp, Voltage = 400 V. What is the power distribution loss? Can I reduce it by adding capacitor at the load feeder?

0 Answers Accenture,

For more Electrical Engineering Interview Questions Click Here