Technical Support

What is the purpose of conducting power frequency AC withstand voltage tests

:2023-11-15 15:58:28:

The power frequency AC withstand voltage test is to apply a certain voltage to the tested object and maintain it for a certain period of time to consider the insulation capacity of the tested object to withstand various voltages, thereby ensuring the safe operation of the equipment. Although many insulation defects can be detected through insulation resistance and absorption ratio tests, leakage current and DC withstand voltage tests, as well as dielectric loss angle measurement tests, it is often not possible to detect some insulation defects in a timely manner because the test voltage is lower than the working voltage of the test object. In order to further expose equipment defects, check the insulation level of electrical equipment and ensure whether it can be put into operation, it is necessary to conduct AC withstand voltage tests. It is the most direct and effective method for identifying the insulation strength of electrical equipment, and it has decisive significance for determining whether electrical equipment can be put into operation.


The main purpose of conducting power frequency AC withstand voltage tests is to ensure that electrical equipment can safely withstand rated voltage and potential voltage surges during normal operation, in order to ensure the reliability of equipment operation and personal safety. Specifically, the purpose of the power frequency AC withstand voltage test includes:

1. Testing the insulation performance of equipment: By applying a certain power frequency AC voltage to the equipment, the insulation performance of the equipment can be tested to determine whether the equipment has sufficient insulation strength and prevent electrical faults and accidents caused by insulation breakdown.

2. Verify the withstand voltage capability of the equipment: The withstand voltage test can test whether the equipment and its insulation system have sufficient withstand voltage capability to safely withstand the rated voltage or above, in order to prevent equipment damage or accidents caused by excessive voltage.

3. Verify the electrical connection of the equipment: By conducting a voltage withstand test, it is possible to check whether the electrical connection of the equipment is normal and whether there are issues such as grounding, short circuits, and open circuits, in order to ensure that the equipment can operate normally and does not cause safety hazards such as electrical fires.

4. Inspection of the insulation material and structure of the equipment: Through voltage withstand tests, it can be verified whether the insulation material and structure of the equipment meet the design requirements, whether they can withstand the corresponding voltage and electric field strength, to determine whether the equipment meets the requirements of safety and reliability.

In short, the purpose of the power frequency AC withstand voltage test is to ensure that the equipment can safely withstand normal voltage and electric field strength under normal working conditions, prevent electrical faults and accidents, and ensure the safety of workers and equipment.


The ZC-500 power frequency withstand voltage control box (referred to as the tester) adopts CNC technology and has strong anti-interference ability. Compared with the previous generation of operation boxes, it has the characteristics of small size, light weight, and beautiful appearance. Its output voltage amplitude is continuously adjustable from 0 to 250V, used for voltage regulation control of calibration, detection, and testing equipment. The operation box is simple, compact, sturdy, reliable, and easy to maintain. It is an ideal control equipment for outdoor high-voltage testing and can be widely used in industries such as power, water conservancy, chemical, railway, and laboratories.

Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase.

My Site ©    Powered By Kvtester