# how to find power Factor Reg

Status
Not open for further replies.

#### svaidy

##### Newbie level 5 how to find power factor

Hello,

I have the following values : V=210volts, I=1.3 Amps, time=20ms

Please tell how to calculate the power factor. please tell the procedures.

Thanking you,

with regards,
S.Vaidyanathan,

#### Prabakaran

##### Full Member level 3 how to find power

Dear vaidy

Please give me the details how u calculate the time.

U Need to get the ZCD for Voltage & Current in External Interrupt Mode. From that using Timer u can Calculate the Power Factor.

Regards
Prabakaran

#### svaidy

##### Newbie level 5 how to find power factor

Hi ,

I also have doubt, my sir asks to suppose you have this value? how to find the power factor.

we need to convert the voltage current into degree and take cos(phi).

Thank you Sir.

#### CMOS

##### Advanced Member level 3 What is the frequency? 50Hz or 60Hz?
If it is 50Hz, cycle time is 20ms.
So the phase difference in degrees between current and voltage will be
Phi = t x 360 / 20ms
Phi = 20ms x 360 / 20ms
Phi = 360° or 0°
Hence, PF = Cos(Phi) = Cos(0) = 1

Status
Not open for further replies.