The HDF Ultra-Low Frequency AC High Voltage Test Device is a core product independently developed by our company, which overcomes many shortcomings of the first-generation mechanical products, with a cost-performance ratio far higher than similar imported products. It is especially suitable for withstand voltage tests on electrical equipment with large insulation equivalent capacitance (such as power cables, power capacitors, large and medium-sized generators and motors, etc.), and meets the requirements of the newly issued national electric power industry standard "General Technical Conditions for Ultra-Low Frequency High Voltage Generators DL/T849.4-2004" in 2004.
◆ Advanced technology: adopts digital frequency conversion technology, microcomputer control, fully automated test processes such as boosting,降压, measurement, and protection;
◆ Convenient operation: simple wiring, foolproof operation;
◆ Comprehensive protection: multiple protections (overvoltage protection, overcurrent protection on both high and low voltage sides), fast action (action time ≤20ms), safe and reliable instrument;
◆ Safe and reliable: low-voltage connection between controller and high-voltage generator, photoelectric control, safe and reliable use;
◆ Adopts high-low voltage closed-loop negative feedback control circuit, output has no capacitive rise effect;
◆ Complete configuration: liquid crystal Chinese character display, automatic storage, automatic printing;
◆ Large test range: multiple frequency selection of 0.1Hz, 0.05Hz and 0.02Hz, large test range;
◆ Small size and light weight: very conducive to outdoor operations;
