Measurements: Review Of Formulas Used - AEMC 3910 User Manual

4.6

Measurements: Review of Formulas Used

RMS Voltage:
RMS Current:
Active Power:
Apparent Power:
Power Factor:
Reactive Power:
TRMS Power Meter Model 3910
1
Vrms =
n
1
Irms =
n
n
1
∑
W =
Vn.In
n
1
VA = Vrms x Irms
W
PF =
VA
2
Var =
VA
n
2
∑
V
n
1
n
2
∑
I
n
1
2
W
1