How to Calculate the PF Factor of a mcahine

[admin]

Hi all

 

Please can someone help me, i am trying to calc the PF factor of my heavyduty machines.

 

I know the voltage and the amps but how do i calc the PF factor??

 

Please help its driving me made

[admin]

David Knight said:

Hi all

 

Please can someone help me, i am trying to calc the PF factor of my heavyduty machines.

 

I know the voltage and the amps but how do i calc the PF factor??

 

Please help its driving me made

power output=VxIxCOS@… cos@ is the powerfactor

---

[admin]

hi,

generally Power=Voltage*current*power factor

if you known V and I then you can find the P.F from the above formaula…

[admin]

---

Follow link..u will get ur answer
 

http://www.allaboutcircuits.co….._11/4.html

[admin]

Does anyone know where i can get power factor standards of various equipment ?

im sizing the capacitor bank for a hospital so there is a lot of equipment

and does anyone know if nema has standards for power factors of motors?

thx

[TRIPURARI]

p=v*i*cos@

                 where p=power

                           v=voltage

                           i=current

                          cos@=power factor

[Spir Georges GHALI]

David Knight said:

Hi all

 

Please can someone help me, i am trying to calc the PF factor of my heavyduty machines.

 

I know the voltage and the amps but how do i calc the PF factor??

 

Please help its driving me made

---

David Knight said:

Hi all

 

Please can someone help me, i am trying to calc the PF factor of my heavyduty machines.

 

I know the voltage and the amps but how do i calc the PF factor??

 

Please help its driving me made

---

Dear Davis ;

 

First, if you know the Voltage, the current of the machine, the kind of machine ” Sigle phase  or  3 phases “, and the power of the machine, you can do a simple calculation to have the value of Cos φ, where :

     – For Single phase machine : P = V x I x Cos φ

     – For 3 phases machine : P = 1.73 x U x I x Cosφ

          Noting that :

            – V : value of voltage betwwen phase & neutral

            – U : value of voltage between 2 phases.

            – I : the current of the machine

 

but, if you don't know the power of the machine, so you should either measure directly the value of Cos φ.

 

regards.

[Author]

Posts