Maverickmax
Advanced Member level 1
how to calculate power factor
Hi
I am taking samples at least 1ms sample of 50Hz sine wave on 3 phase and I manage to get Vrms and Irms from 3 phase. But I am not sure how to calculate apparent power and watt.
3Ph Vrms =(V1rms + V2rms + V3rms)/3
3Ph Irms =(I1rms + I2rms + Irms)/3
3Ph Apparent power = sqrt(3)* 3Ph Vrms * 3Ph Irms (Is that correct?)
3Ph Watt = 3Ph Vrms * 3Ph Irms (Is that correct?)
pf=kW/kVA (Is that correct?)
mm\]
Added after 1 hours 19 minutes:
It appears that apparent power is correct. I am still unsure about kW beacause the power factor is unknown.
kW = (1.73*Irms*Vrms)/1000*power factor.
Since I don't know what load will be. Assuming that load is resistive hence power factor would be unity (1).
So how earth can I calculate the kWatt then calculate powerfactor by dividing kVA?
Please help me asap
MM
Hi
I am taking samples at least 1ms sample of 50Hz sine wave on 3 phase and I manage to get Vrms and Irms from 3 phase. But I am not sure how to calculate apparent power and watt.
3Ph Vrms =(V1rms + V2rms + V3rms)/3
3Ph Irms =(I1rms + I2rms + Irms)/3
3Ph Apparent power = sqrt(3)* 3Ph Vrms * 3Ph Irms (Is that correct?)
3Ph Watt = 3Ph Vrms * 3Ph Irms (Is that correct?)
pf=kW/kVA (Is that correct?)
mm\]
Added after 1 hours 19 minutes:
It appears that apparent power is correct. I am still unsure about kW beacause the power factor is unknown.
kW = (1.73*Irms*Vrms)/1000*power factor.
Since I don't know what load will be. Assuming that load is resistive hence power factor would be unity (1).
So how earth can I calculate the kWatt then calculate powerfactor by dividing kVA?
Please help me asap
MM