Woodward LS-5 v2 Series - Analog Input 0;4 to 20 Ma

Inductive Capacitive
motors have a large startup current requirement
resulting in lagging power factors.
capacitor banks or buried cable result in leading
power factors.
Di󰈠erent power factor
display on the unit
i0.91 (inductive)
lg.91 (lagging)
c0.93 (capacitive)
ld.93 (leading)
Reactive power display
on the unit
70 kvar (positive) -60 kvar (negative)
Output of the interface + (positive) - (negative)
Current relation to
voltage
Lagging Leading
Generator state Overexcited Underexcited
Control signal If the control unit is equipped with a power factor controller while in parallel with the utility:
A voltage lower "-" signal is output as long as
the measured value is "more inductive" than the
reference setpoint
Example: measured = i0.91; setpoint = i0.95
A voltage raise "+" signal is output as long as
the measured value is "more capacitive" than
the reference setpoint
Example: measured = c0.91; setpoint = c0.95
Phasor diagram
The phasor diagram is used from the generator's view.
−90°
0°180°
90°
692.8 VA
300.0 V 1.0 A
U L3-E
I L3
U L2-E
I L2
U L1-E
I L1
−90°
0°180°
90°
692.8 VA
300.0 V 1.0 A
U L3-E
I L3
U L2-E
I L2
U L1-E
I L1
Fig. 57: Phasor diagram: capacitive load (left) and inductive load (right)
3.3.8 Analog Input 0/4 to 20 mA
This Analog Input AI01 is 󰈡xed to external power measurement System A or System B.
64 LS-5 v2 Series 37650
3 Installation
3.3 Setup Connections
Released