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2018.01 / g
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Electric Power Generation
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Installation and maintenance
R150
AVRs
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 difficult 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 (3-PH)
Model: R150
LAMP
100 W
230 V
VAC
0-500 V
STATIC TEST CONNECTION DIAGRAM OF 3-PH AVR
415 V
, 3Ø, 50 Hz,
WITH NEUTRAL
VARIAC
8 A, 415 V