After the voltage of the three-frequency generator device rises to the target value during the withstand voltage test, the timing begins.



The three-frequency generator device, full name three-frequency induced withstand voltage test device, is a "touchstone" in the power system for assessing the insulation strength of equipment such as transformers and voltage transformers (PT).

Simply put, its core task is to generate a 150Hz power supply (3 times the power frequency of 50Hz) to solve the problem of iron core saturation caused by voltage increase during withstand voltage tests on high-voltage equipment.

The following is a detailed explanation of the device's principle, purpose, and operation points: