IEC 60-1: 1989 High Voltage Test Techniques Part 1: General Test Requirements

DLT 848.1-2004General Technical Conditions for High Voltage Test Devices Part 1: DC High Voltage Generator

The DC high voltage generator adopts a medium-frequency voltage doubling circuit. The new DC high voltage generator applies PWM pulse width modulation technology and high-power IGBT devices. According to electromagnetic compatibility theory, special shielding, isolation, and grounding measures are adopted. This enables high-quality, portable DC high voltage testing that can withstand rated voltage discharge without damage. The DC high voltage generator has multiple protection functions, such as low-voltage overcurrent, low voltage overvoltage, high-voltage overcurrent, high-voltage overvoltage, zero-position protection, and non-grounding protection. The drive signal fast shutdown protection uses dedicated sensor sampling at the output end, with a response time at the nanosecond level. Through nanosecond-level optical isolation components and nanosecond-level analog switches, the drive signal of the power amplifier circuit is cut off within 2 microseconds, ensuring that power devices are not damaged in the case of output short circuit. It refers to a high-voltage power supply mainly used in insulation and leakage detection. There is no strict distinction between high-voltage power supplies and high-voltage generators. The DC high voltage generator is the first in the industry to adopt a segmented structure, which can be used for both high voltage levels and lower voltage levels while maintaining its accuracy. Taking 100/200kV/2mA divided into two sections as an example, when used as a single section, it can be used as 100kV/2mA for DC high voltage testing of electrical equipment in systems of 35kV and below, ensuring measurement accuracy and avoiding overkill; when used as two sections, it can be used as 200kV/2mA for DC testing of zinc oxide arresters in 220kV sections, 110kV and below, and DC withstand voltage testing of cross-linked cables. It truly achieves dual-purpose use, greatly facilitating on-site users. It is mainly used to study the insulation strength of electrical equipment under DC high voltage, the corona and ion flow of DC transmission lines and their effects, as well as the leakage current tests of AC and DC power equipment. In addition, it can also serve as a power source for other high-voltage test equipment such as impulse voltage generators, impulse current generators, and oscillating circuits. It is also widely used in other scientific and technological fields, such as physics (accelerators, electron microscopes, etc.), electronic medical equipment (X-rays), industrial applications (exhaust gas precipitation, electrostatic painting, etc.), or electronic communications (television, broadcasting stations).