Reactive Load Current Compensation (Vx) - GE KVGC 202 Technical Manual

KVCG202/EN M/H11
Remove the load current from the relay.
If Vreg is lower than Vs it is almost certain that there is an unintentional polarity reversal
somewhere in the test circuit.
[Restore the following settings:
- intertap delay (tINTER) ,
- system voltage input setting (Vs),
circulating compensation voltage setting(Vc),
-
resistive line drop compensation setting (Vr),
-
reactive line drop compensation setting (Vx),
-
- load current setting (
9.6.4.2

Reactive load current compensation (Vx)

The relay should be commissioned with the settings calculated for the application.
Check the relay mode setting [0102 STATUS].
[Before making the following changes note the settings and system data links for: intertap
delay (tINTER), system voltage (Vs), circulating compensation voltage (Vc), resistive line
drop compensation setting (Vr), reactive line drop compensation setting (Vx), load current
I
setting ( L)].
Set the:
- system voltage (Vs) setting to 100V,
intertap delay (tINTER) to 0 seconds,
-
circulating compensation voltage setting (Vc) to 0V,
-
resistive line drop compensation setting (Vr) to 0V,
-
reactive line drop compensation setting (Vx) to required setting (or 20V),
-
- load current setting (
The reactive load drop compensation may be used to compensate for voltage drop due to
reactive elements in the power line in the same way as the resistive load drop
compensation. In addition, by setting the compensation to reverse compensation can be
achieved for circulating currents as circulating currents have a high reactive content.
Apply a current of 1x
phase shifter to give 0 degree phase angle between the applied voltage and load current
(voltage is in anti-phase with current).
A tap change should be initiated (i.e. Raise or Lower volts) and the 'CONTROL LED'
should be illuminated. Alter the system voltage (Vbc) until the relay stop tapping (i.e.
both Raise and Lower volt contacts are open). Determine the regulated system voltage
Vreg [0202 MEASURE]. Check the value recorded is:
Vx = Vph – ph – Vreg ± 0.5V or ±5% whichever is greater.
The measured line voltage Vph – ph can be read in [0201 MEASURE]
Remove the load current from the relay.
[Restore the following settings and system data links:
intertap delay (tINTER),
-
- system voltage input setting (Vs),
- circulating compensation voltage setting (Vc),
I
L)].
I I
L) to 1 n].
I
n to the load current inputs, (terminals 27 and 28). Adjust the
Technical Manual
KVGC202