User Manual Q&AAnswer
Mar 01, 2025 - 03:47 AM
To perform the static test on the Nidec R150 AVR Leroy Somer, follow these steps:
1. Ensure that the AVR has passed all multimeter checks before proceeding with the static test.
2. Connect the AVR to the three-phase variable voltage source as shown in the diagram for the 3-phase installation in the manual.
3. Keep the "V-TRIM" potentiometer in the minimum position.
4. Keep the "UF" potentiometer in the fully maximum position.
5. Increase the applied voltage gradually. The lamp should start to glow increasingly brighter. 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.
6. Decrease the voltage to below 360 V. The lamp should glow brightly again.
7. Turn the "UF" potentiometer anticlockwise. The lamp should go out slowly. Now turn the "UF" potentiometer clockwise. The lamp should glow brightly again.
8. To check the stability, keep the "STAB" potentiometer in the fully anticlockwise position. Perform the static test as described in steps 5 and 6. The lamp should go out fairly quickly at 360-380 V and come on again quickly when the voltage is reduced below 360 V.
9. Now keep the "STAB" potentiometer fully clockwise and perform the static test as in steps 5 and 6. The lamp should go out much more slowly and come on again much more slowly. At the end of this test, reset the potentiometer to the middle position.
10. If the AVR behaves as described above, then the regulator is healthy.
Note: It is important to follow the instructions carefully and ensure that the AVR has passed all multimeter checks before performing the static test.
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