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How to use dry test transformer

time:2020/11/8   source:华天电力  reading:747 time

How to use dry test transformer:

1. Before the test, the “” end of the shell of the high-voltage dry-type test transformer and the ground “” of the power control box must be well grounded, otherwise it will endanger the safety of people and equipment.

2. Before operation, you must be familiar with the electrical principle and wiring diagram of the high-voltage test transformer and the power control box. If checking the DC withstand voltage and leakage test, the high-voltage wah or micro-ammeter can be screwed on the high-voltage end of the high-voltage test transformer first.

Hipot Test Set (Dry Type).png

3. After the preparation is completed and the wiring is checked, the main power switch can be turned on, and the red switch indicator light is also on. If it does not light up, the regulator handle should be returned to the zero position counterclockwise, and the indicator light on the red stop button is on, otherwise the start button refuses to cooperate.

4. Press the start button, and the green button indicator light is on. At this time, rotate the handle of the voltage regulator evenly and slowly at a clockwise speed of 1.5-2 kV per second. The high voltage gradually rises and pay close attention to the indication of the voltmeter and the condition of the test product. , Until the required test high pressure is adjusted.

5. To test the withstand voltage test time of the product, you can pull the timer for the required timing and press the timing and alarm switch, that is, test the product withstand voltage within the specified time, and then give an alarm to notify if the tested product is broken down , The over-current relay trips automatically. At this time, the reading of the voltmeter is the breakdown voltage of the product.

6. If you need to protect the tested product from breakdown, you can first connect the discharge protection ball gap continuously on the high voltage side to adjust the discharge voltage of the protection ball to about 1.15 times the test voltage.

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