The power-frequency withstand test is a crucial test for high-voltage electrical equipment. This test is performed by the IEC 60060-1 standard. The aim of this test is to evaluate the ability of the equipment to withstand voltage stress when it is operating at its rated level.
Performing the power-frequency withstand test requires specialized equipment, such as a high-voltage test set. The test is typically carried out in a laboratory or test field, where safety precautions must be taken to prevent any accidents. Testing must be conducted by trained personnel who understand the risks and hazards of high-voltage testing.
1. Test voltage shall have an appropriate value depending on the highest voltage for equipment.
2. The duration shall be 60 s.
3. Test voltage shall be applied between short-circuited primary winding and earth. The short-circuited secondary winding(s), frame, case (if any) and core (if there is a special earth terminal) shall be connected to the earth.