The high-voltage withstand voltage test of electrical equipment is one of the most important items specified in the "Insulation Preventive Test". Voltage withstand test can be divided into AC voltage withstand test and DC voltage withstand test. AC voltage withstand test can also be divided into power frequency, frequency conversion, and 0.1Hz ultra-low frequency testing technology. Among them, 0.1Hz ultra-low frequency technology is the latest technology recommended by the International Electrotechnical Commission. Our company's new generation ultra-low frequency high-voltage generator series is a core product independently developed using the latest American technology. It features a 7-inch touch screen, the latest ARM7 microcontroller, high-speed AD acquisition circuit, and is equipped with backend management software. It overcomes many shortcomings of similar domestic products (see Table 1),
The cost-effectiveness is much higher than that of similar imported products, especially suitable for withstand voltage testing of electrical equipment with high insulation equivalent capacitance (such as power cables, power capacitors, large and medium-sized generators, and motors), which meets the requirements of the newly issued national power industry standard "General Technical Conditions for Ultra Low Frequency High Voltage Generators DL/T849.4-2004" in 2004.

Technical features
1. Advanced technology: adopting digital frequency conversion technology, microcomputer control, fully automated testing processes such as boost, buck, measurement, and protection;
2. Equipment operation: simple wiring and convenient use;
3. Comprehensive protection: multiple protections (overvoltage protection, high and low voltage side overcurrent protection), quick action (action time ≤ 10ms), instrument safety and reliability;
4. Safe and reliable: The controller and high-voltage generator are connected at low voltage, with photoelectric control, ensuring safe and reliable use;
5. Adopting high and low voltage closed-loop negative feedback control circuit, the output has no capacitance rise effect;
6. Complete configuration: capacitive touch screen, LCD Chinese character display, automatic storage, automatic printing;
7. Large testing range: Multiple frequency options of 0.1Hz, 0.05Hz, and 0.02Hz, with a wide testing range;
8. Small size and light weight, especially suitable for outdoor operations;
9. Chinese English switching function;
10. Performance comparison between ultra-low frequency 0.1Hz test device and other withstand voltage test equipment.