Woodward LS-5 v2 Series - Power Factor Definition

Description Sign displayed
Inductive (lagging) power 󰈢ow Inductive power 󰈢ow from System
B to System A
+ Positive
The load is calculated with the System A and System B active power: P
L
= P
SyB
- P
SyA
CBA
System A System B
CBB
-P
SyA
L
+P
Fig. 55: LS-5x2 v2 Power measuring CBA closed
CBA
System A System B
CBB
L
+P
+P
SyB
Fig. 56: LS-5x2 v2 Power measuring CBB closed
3.3.7
Power Factor De󰆟nition
De󰂢nition
Power Factor is de󰈡ned as a ratio of the real power to apparent power. In a purely
resistive circuit, the voltage and current waveforms are instep resulting in a ratio or
power factor of 1.00 (often referred to as unity).
In an inductive circuit the current lags behind the voltage waveform resulting in usable
power (real power) and unusable power (reactive power). This results in a positive ratio or
lagging power factor (i.e. 0.85lagging).
In a capacitive circuit the current waveform leads the voltage waveform resulting in
usable power (real power) and unusable power (reactive power). This results in a negative
ratio or a leading power factor (i.e. 0.85leading).
Properties
Inductive Capacitive
Load type Electrical load whose current waveform lags the
voltage waveform thus having a lagging power
factor. Some inductive loads such as electric
Electrical load whose current waveform leads
the voltage waveform thus having a leading
power factor. Some capacitive loads such as
63LS-5 v2 Series37650
3 Installation
3.3 Setup Connections
Released