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

How can we calculate cable size in Low voltage & high voltage

1 Answers   United Breweries UB,

what is the necessity of neutral in 3 phase system?

5 Answers  

what is the series parallel connection of capacitors? and how can we use these application in three phase motors for controlling torque?

1 Answers  

How can claculate to attain the desired PF in the line ( HOW Much KVAR is required ) Pls Give the formula? Equate Petrochemical 0 1 how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec. 0 1 What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding? Equate Petrochemical 0 1 What is required of exietation to the alternater. 0 1 why star point of HT motor not earthed? Equate Petrochemical 0 1 Why we are getting low voltage in star connection? Equate Petrochemical 0 2 What's ND relay & it's functions? Equate Petrochemical 0 2 How instantanious short circuit current is calculated? its formula? Equate Petrochemical 0 2 What is servo Motor? What's the advantages of this motor over Induction motor? Equate Petrochemical 0 2 What is core CT & it's function? Equate Petrochemical 0 3 what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY L & T 0 4 What is required of exietation to the alternater. KNB 1 23 what is the design voltage for 6.6KV 2000 KVAR HT capacitor? Consultancy 0 3 Pls explain about vfd control?Where it is used, Give some example? siemens 1 22 Please explain me abt PQ diagaram in the power sector. 0 9

1 Answers  

in CNC reference how to take? what kind of input give to the servo amplifier?

1 Answers  

1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

1 Answers  

what is difference between vcb and mccb

4 Answers   APTransco,

what is mean by PID & Principal of working

6 Answers  

what is the advantage of connecting capacitors in delta than in star?

1 Answers  

what will be the magnetizing current in the testing of 27 MVA transformer?

1 Answers  

If one d.g. is unable to take full load of system, then second d.g. will take care of partly Load.for this condition RPM of both DG set should be equal.By using Synchronization panel RPM of dg sets are match, is it true?

1 Answers  

why fuse is not applicable for nutral and what will happen when it applied.

4 Answers