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Operation method of high voltage test transformer

time:2021/5/15   source:华天电力  reading:238 time


1. Before the power frequency withstand voltage test of the 5KVA high-voltage test transformer power supply control box, first connect the connection line and then turn on the power, turn on the power switch, the red zero indicator light is on, you can press the alarm button first, and the buzzer will start alarming. The test begins. Then press the start button, the green indicator light is on, indicating that the test transformer has been connected to the control power supply, and slowly turn the touch plate clockwise to start the voltage increase. After the voltage has risen to the rated test voltage you need, press the timer button [time can be free Setting], the buzzer starts to flash when the time is over, press the stop button once to stop the high-voltage and low-voltage output, then cut off the power cord, and the test is complete.

Hipot Test Set.png

2. Precautions for high voltage test transformer

1) The test personnel should do a good job division of responsibilities, set the safety distance of the test site, carefully check the grounding conditions of the test product and the test transformer, and have a dedicated person to monitor the safety and observe the status of the test product.

2) The main parts of the tested product should be cleaned up and kept dry to avoid damaging the tested product and causing errors in the test value.

3) For the test of large-scale equipment, the air-lift test of the test transformer should generally be carried out first, that is, the voltage is boosted to the test voltage when the test product is not connected.

4) When doing the withstand voltage test, the boost speed should not be too fast, and sudden pressure should be prevented. For example, the voltage regulator is not at the zero position suddenly closed, and the power can not be suddenly cut off. Generally, it should be divided when the voltage regulator drops to the zero position. brake.

5) During the boost or withstand voltage test, if the following abnormal conditions are found, the pointer of the voltage and ammeter swings greatly, the tested product makes an abnormal sound, and the insulation is found to be scorched or smoked, the voltage should be reduced immediately , Cut off the power, stop the test and find out the cause.

3. When using high-voltage test transformers for high-voltage tests, in addition to being familiar with this manual, the relevant national standards and operating procedures must be strictly followed.

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