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AC DC withstand voltage test
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AC withstand voltage test & DC withstand voltage test

The DC withstand voltage test has a high voltage, and it has special effects on finding some insulation defects, which can be carried out at the same time as the leakage current test. Compared with the AC withstand voltage test, the DC withstand voltage test has the advantages of light weight, small damage to insulation, and easy to find defects of equipment.

AC DC Voltage Dielectric Test Equipment

Compared with the AC Dielectric test, the main disadvantage of the DC withstand voltage test is that the DC withstand voltage test is not as close to the actual as the AC due to the different voltage distribution inside the insulation under AC and DC.

AC withstand voltage test is an effective method to identify the dielectric strength, especially for the defects of the main insulation, such as the main insulation of the winding during transportation, such as moisture, cracking or loosening, insufficient lead spacing, insulation on the winding insulation, etc. AC withstand voltage test has very strict insulation test requirements, which can effectively find more dangerous concentrated defects. It is the most straightforward way to identify the dielectric strength of electrical equipment. It is of decisive significance to judge whether the electrical equipment can be put into operation. It is also an important means to ensure the insulation level of equipment and avoid insulation accidents. The AC withstand voltage test can sometimes make some weak links in the insulation more developed. Therefore, the insulation resistance, absorption ratio, leakage current and dielectric loss must be tested before testing. If the test result is satisfactory, the AC resistance can be turned on. Stress test. Otherwise, it should be dealt with in a timely manner. After all indicators are qualified, the AC withstand voltage test is carried out to avoid excessive damage to the insulation. Although the AC withstand voltage test is effective for finding insulation defects, it is limited by the test conditions. It is necessary to carry out the transformer withstand voltage test of 66kV and above. Due to the high voltage and high current, such should be dealt with in time. After all indicators are qualified, the AC withstand voltage test is carried out to avoid excessive damage to the insulation. Although the AC withstand voltage test is effective for finding insulation defects, it is limited by the test conditions. It is necessary to carry out the transformer withstand voltage test of 66kV and above. Due to the high voltage and high current, such should be dealt with in time. After all indicators are qualified, the AC withstand voltage test is carried out to avoid excessive damage to the insulation. Although the AC withstand voltage test is effective for finding insulation defects, it is limited by the test conditions. It is necessary to carry out the transformer withstand voltage test of 66kV and above. Due to the high voltage and high current, such high-voltage test transformers and regulators are not widespread enough. The high voltage variable inductance resonant test system is used to generate high voltage, and conducts the high voltage withstand voltage test on the high-voltage equipment. In terms of actual results, the effect is very good.
AC DC Voltage Dielectric Test Equipment