It is an effective device for identifying the insulation strength of power equipment, designed according to national power industry standards for power frequency withstand voltage testing. It can detect those concentrated defects with high risk, playing a decisive role in judging whether power equipment can continue to operate. It is an important means to ensure the insulation level of equipment and avoid insulation accidents.
K-------Safety factor. K≥1, when the nominal voltage Vn≥1MV, power frequency withstand voltage test standard K=2, when the nominal voltage is lower, the K value can be taken higher. Withstand voltage test steps
Note: The capacitance Ct of the tested device can be measured by an AC bridge. Ct varies greatly, typical data are as follows:
The power frequency withstand voltage test device is used to conduct insulation strength tests at specified voltages on various electrical products, electrical components, insulating materials, etc., to discover insulation defects of the tested object and measure the ability to withstand overvoltage. We need to choose the appropriate capacity of the test equipment. If the test equipment capacity is insufficient, or too large, the principle of withstand voltage test will affect the on-site test.
