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Technical Manual
KVGC202
resistive line drop compensation setting (Vr),
-
reactive line drop compensation setting (Vx),
-
-
load current setting (
9.6.4.3
Circulating current compensation (Vc)
The relay should be commissioned with the settings calculated for the application.
The circulating current compensation is used when two or more transformers are
paralleled. The circuits monitor the amount of current circulating between the
transformers and applies a compensation voltage to cause the transformers to tap up or
down as required to ensure the transformers are not more than 1 tap apart.
For the 1A rated relay.
Check the relay current rating is set to 1A [0304 CONTROL].
For the 5A rated relay.
Check the relay current rating is set to 5A [0304 CONTROL].
[Before making the following changes note the settings 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:
-
intertap delay (tINTER) to 0 seconds,
-
system voltage input setting (Vs) to 100V,
-
circulating compensation voltage setting (Vc) to 10V,
resistive line drop compensation setting (Vr) to 0V,
-
reactive line drop compensation setting (Vx) to 0V,
-
-
circulating current setting (
9.6.4.4
Negative compensation
I
Apply 0.2
n to the circulating current (
relay use terminals 25 & 26). Adjust the phase shifter to give a 180 degree phase angle
I
(negative
c compensation) between the system voltage input and circulating 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 stops tapping
(i.e. both Raise and Lower volt contacts are open). Determine the regulated system
voltage Vreg [0202 MEASURE]. Check the value recorded is: Vs +2V ±5%.
Remove the load current from the relay.
9.6.4.5
Positive compensation
I
Apply 0.2
n to the circulating current (
relay use terminals 25 & 26). Adjust the phase shifter to give a 0 degree phase angle
I
(positive
c compensation) between the system voltage input and circulating 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 stops tapping (i.e.
both Raise and Lower volt contacts are open). Determine the regulated system voltage
Vreg [0202 MEASURE]. Check the value recorded is: Vs –2V ±5%.
Remove the load current from the relay.
[Restore the following settings and system data links:
I
L)].
I
I
c) to
n].
I
c) inputs (terminals 23 & 24) (For the 5A rated
I
c) inputs (terminals 23 & 24) (For the 5A rated
KVCG202/EN M/H11
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