Answer / md. zakir hosen

We know P=VICOSф.
Here, P=1H.P=746W,V=415v,I=1.85amp
Now putting this value on the equation simply we get the PF.
746=415*1.85*COSф
746
=>COSф=----------=0.9716 and it must be lagging.
415*1.85


More info: Earn and Learn pls visit

http://a2zengineering.blogspot.com/

Answer / prakash veer singh

Dear Zakir husan
What is 1092 in your equation .
That we know that
p=root3 v*i*cos phi
1 h.p =746 watts = 1.732*415*1.86*cos phi
cos phi= 746/1.732*415*1.86
= 0.55 and pf leging.

Answer / aaaa

its depend on phase no of the motor.(3-phase , single phase)

Answer / vishnu

here P=1H.P=746w,
I=1.86,
V=415V

FORMULA P=1.732*V*I*COS phi
cos phi=746/1.732*415*1.86

cos phi=0.55

Answer / jagjeet

Dear Satish
The power factor dependent on the loading factor of the
induction motor , You can measure the Line current and apply
the formula suggested by Zakir or you can refer the
characteristics charts of Motor to find out the Power Factor.

Answer / shakus

@Sakthish_kumaar

Please mention whether the motor is single phase or three
phase?
apply for single phase>>

P=VIcosØ

and Apply for three phase>>

P=√3VIcosØ

What information we need to prepare relay coordination chart

0 Answers  

can I connect 25KvA stepdown transformer(RYB-440V,UVW-240V) to the output of 15KvA,3-phase online UPS(440V phase to phase)please brief.

1 Answers  

What type of input will the OLTC indicator will accept or what type of output the OLTC will produce to monitor it's position at remote location.

1 Answers   amps,

what is suroounding current of dg set?

1 Answers   Airtel, Sukarma,

how the aircraft outer body and inner body is separated ?

0 Answers  

What is the effect of positive feedback on stability of the system?

0 Answers  

What is the rate of WCT on the Electrical Contracts comprising of DG Sets and Civil Works in Delhi ?

0 Answers   MES Military Engineer Services,

what is the responsibility of C license holder in industry?

0 Answers  

in elevator industries , how to calculate the required KVA for the elevator (elevator spec- 40A module , motor of 13.5KW, 20A)

1 Answers   DLF, Tata Steel Limited,

in a large three phase induction motors usually the value of full load slip is

1 Answers   PSEB,

how can calculate static 3phase 4wire CT & PT operated energy meter constant when calibrating using refference meter suppose we have 11kv/110v PT and 30/5A CT, the meter constant is 160imp/kwh, where meter is showing MW energy? give me solution which constant i feed in my refference meter for calibration of energy meter?

3 Answers  

is there any difference in reading or error in value, if we connect the R phase in Y terminal and Y phase in R terminal of electronic energy meter of 11 kv feerders???

1 Answers   KSEB,