Dry-type test transformers play an obvious role in high-voltage test tests, and are one of the most frequently used instruments and equipment by the majority of testers.

The author of HV HIPOT will introduce the standardized test steps of dry-type test transformers to help you improve the test and test efficiency.

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Single use of dry-type test transformers

1. Before the test, the “┻” end of the high-voltage tail of the test transformer should be reliably grounded, otherwise the safety of people and equipment will be endangered.

2. Before operation, you must be familiar with the electrical principle and usage of the test transformer and power control box.

3. Connect according to the wiring diagram.

4. The preparations and safety measures are ready, and the equipment is tested once.

5. Connect the test object.

6. Turn on the power supply, the power indicator light of the control box (unit) is on.

7. Press the closing button, the closing indicator light is on.

8. Pressurize evenly in a clockwise direction, and watch the voltage amplitude at the stage where the voltmeter arrives and the condition of the tested product until the rated test voltage.

9. Continue to specify the withstand voltage time and watch the ammeter and the tested product.

10. When the withstand voltage time is up, watch the kV meter and quickly return the voltage regulator to zero.

11. Use a discharge rod to discharge through the resistance, and then directly discharge to the ground.

12. The high-voltage part may be discharged one by one by the charging part, change or remove the lead of the high-voltage line, and the one (phase) test is terminated.