The high-voltage withstand voltage test of electrical equipment is one of the most important items specified in the “Insulation Preventive Test”. It also belongs to high frequency voltage generator. Withstand voltage test can be divided into AC withstand voltage test and DC withstand voltage test. AC withstand voltage test can be divided into power frequency, frequency conversion and 0.1Hz ultra-low frequency test technology. Among them, 0.1Hz ultra-low frequency technology is the most new technology, which is current Technology recommended by the International Electrotechnical Commission.

Our new generation series of ultra-low frequency high-voltage generators are core products independently developed by adopting the latest American technology. It adopts 7-inch touch screen, the latest ARM7 single-chip microcomputer, high-speed AD acquisition circuit, and is equipped with background management software. It overcomes many shortcomings of similar domestic products (see Table 1), and the cost performance is much higher than similar imported products. It is especially suitable for electrical equipment with large insulation equivalent capacitance (such as: power cables, power capacitors, large and medium-sized generators and Electric motor, etc.) withstand voltage test, in line with the 2004 national power industry standard “Ultra-low frequency high voltage generator general technical conditions DL/T849.4-2004” requirements.

Table 1 Comparison of mechanical and electronic performance of 0.1Hz withstand voltage test equipment