1, Characteristics of the ultra-low frequency high voltage generator;
It has protection functions for power supply overcurrent, high voltage overcurrent, and oil tank overheating. The output voltage regulator cannot start high voltage if it is not returned to zero. It is a replacement product for traditional power frequency withstand voltage test equipment. The ultra-low frequency high voltage generator is mainly a new type of ultra-low frequency AC test device that uses cosine square wave as the output source. It is mainly used for non-destructive insulation withstand voltage tests of plastic power cables such as PE (polyethylene) / XLPE (cross-linked polyethylene) in the power sector. It has an international advanced level at the end of the 20th century and a superior domestic level.
Introduction to the ultra-low frequency high voltage generator:
The ultra-low frequency high voltage generator combines modern digital frequency conversion advanced technology and adopts microcomputer control. Voltage boosting, voltage reduction, measurement, and protection are fully automated. Moreover, manual intervention is possible during the automatic voltage boosting process. Due to full electronization, it can be widely used in AC withstand voltage tests of cables, rotating motors, and power capacitors.
The ultra-low frequency high voltage generator adopts an intermediate frequency voltage doubling circuit, 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 the DC high voltage test to achieve high quality, portability, and the ability to withstand rated voltage discharge without damage. The ultra-low frequency 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 ultra-low frequency high voltage generator uses a dedicated fault sampling sensor with an action time at the nanosecond level, and the optical isolation element is also at the nanosecond level. The action time can completely cut off the DC main circuit within 10 microseconds.
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