A 3 phase motor operating off 415V system is developing 20Kw at an efficiency o

A 3 phase motor operating off 415V system is developing 20Kw
at an efficiency of 0.77 and power factor of 0.73.
determine:-

a)the line current.
b)the phase current if winding are delta connected.
c)the phase voltage if winding are star connected.

Question Posted / pzol

1 Answers
3137 Views
I also Faced
E-Mail Answers

A 3 phase motor operating off 415V system is developing 20Kw at an efficiency of 0.77 and power fac..

Answer / v.srinivas

I=P/1.732 X 415 X EFF X PF=49.5(LINE CURRENT)
28.57 AMPS (PHASE CURRENT)
Phase voltage in star connection; 718.78

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

What tests should i carry over on a newly rewinded DC Generator with voltage rating of 38 volts and current rating of 350 amps, to certify that the machine is OK?

0 Answers

in transmission line, if the load is suddenly increased at the receiving end of the system the phase shift will (a)decrease (b)becomems zero (c)increase (d)not be affected

4 Answers Getco,

How to select the Cable size for 550 Amps Load without seeing the cable Catalogue?

8 Answers Nesma,

What is the ratio of Booster transformer?

0 Answers

which INDIAN STANDERD in Mention the earth test value?

1 Answers

What do you mean by pf of a generator? Power factor purely depends on the load (wether inductive, reactive or unity) then what does the pf mentioned on the generator nameplate means?

3 Answers

what is corona

3 Answers

WHAT HAPPENS IF FUSE IS CONNECTED TO NEUTRAL WIRE

5 Answers

Difference between HRG and NGR. Are they both the same thing

0 Answers

Single line diagrams for star to delta and DOL starters.

0 Answers

How to calculate the 2500 Kva Transformer losses Primary 11KV Secondary 415volts

1 Answers Laurus,

For high voltage and low current Circuit Breaker preferred is vacuum circuit breaker.why?

1 Answers

For more Electrical Engineering Interview Questions Click Here