Insulation withstand voltage testing is the core of preventative testing for medium and high voltage power equipment such as XLPE cables, generators, and large motors. Traditional 50Hz power frequency withstand voltage testing requires a large capacitive load, resulting in bulky equipment; while DC

When testing circuit breakers on site, the biggest fear is not discovering faults, but rather the instrument itself falsely reporting military information. Although the switch action is normal, the instrument reports exceeding the travel limit and non compliant synchronicity; Or the detected object

Transformer oil inevitably absorbs moisture, gas, and particulate impurities during long-term operation. These contaminants severely reduce the oil's insulation performance, thereby weakening the transformer's internal insulation strength. When insulation performance drops to a critical value, it m