ABB RELION 620 Series Technical Manual page 644

Section 7
Measurement functions
638
Once the complex apparent power is calculated, P, Q, S and PF are calculated with the
equations:
P = Re( ) S
GUID-92B45FA5-0B6B-47DC-9ADB-69E7EB30D53A V3 EN
Q = Im( ) S
GUID-CA5C1D5D-3AD9-468C-86A1-835525F8BE27 V2 EN
2 2
S S P Q
= = +
GUID-B3999831-E376-4DAF-BF36-BA6F761230A9 V2 EN
P
Cos
ϕ =
S
GUID-D729F661-94F9-48B1-8FA0-06E84A6F014C V2 EN
Depending on the unit multiplier selected with Power unit Mult, the calculated power
values are presented in units of kVA/kW/kVAr or in units of MVA/MW/MVAr.
GUID-9947B4F2-CD26-4F85-BF57-EAF1593AAE1B V1 EN
Figure 323: Complex power and power quadrants
1MAC504801-IB E
(Equation 97)
(Equation 98)
(Equation 99)
(Equation 100)
620 series ANSI
Technical Manual