Installation Guide

2022.02 / j
10
Electric Power Generation
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Installation and maintenance
R150
AVR
5384 en -
9 - STATIC TEST PROCEDURE
For 3-phase circuit
This test should only be attempted after
making sure that the AVR has passed all
multimeter checks. Connect the AVR to the
three-phase variable voltage source as
shown in diagram for 3-phase installation in
this manual.
1. Keep ‘V-TRIM’ in the minimum position.
2. Keep UF in the fully maximum position.
3. Increase the applied voltage. The lamp
should glow increasingly brightly. At a
voltage of around 360-380 V. The lamp
should go out slowly. Increase the voltage
again up to 415 V. The lamp should stay
OFF.
Decrease the voltage to below 360 V. The
lamp should glow brightly again.
4. Turn the UF potentiometer anticlockwise;
the lamp should go out slowly. Now turn
the UF potentiometer clockwise. The lamp
should glow brightly again.
5. It is difcult to prescribe a static test for
checking the stability, as this is more easily
detected during closed loop tests. However,
a healthy AVR will behave as described
below.
First keep the ‘STAB’ potentiometer in the
fully anticlockwise position. Perform the
static test as described in steps 1, 2 and 3.
The lamp will go out fairly quickly at 360-
380 V and come on again quickly when the
voltage is reduced to below 360 V.
Now keep the ‘STAB’ potentiometer fully
clockwise, and perform the static test as in
1, 2, and 3. The lamp should go out much
more slowly and come on again much more
slowly. At the end of this test reset the
potentiometer in the middle position.
If the AVR behaves as described above
then the regulator is healthy.
AVR (3PH)
Model: R150
LAMP
100 W
230 V
VAC
0-500 V
STATIC TEST CONNECTION DIAGRAM OF 3PH AVR
415 V, 3PH, 50 Hz,
WITH NEUTRAL
VARIAC
8 A, 415 V