Siemens MJ-X - Page 39

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PF=
Watts
Volts * Amps
R
eal Power kW
1
n
---
Vn(t) x In(t
)
1
n
∑
=
R
eactivePower kVAR
1
n
---
V(t) x I(t+90°
)
1
n
∑
==
kW (real power)
kVA
+kW (forward)
+kVAR (forward)
+PF (lagging)
+kW (forward)
-kVAR (reverse)
-PF (leading)
-kW (reverse)
-kVAR (reverse)
+PF (lagging)
-kW (reverse)
+kVAR ( )
-PF (leading)
forward
-kW (reverse)
kVAR
(
reactive power
)
I
IV
III
II