The ZGS series DC high voltage generator adopts a high-frequency voltage doubling circuit, applies advanced PWM high-frequency pulse width modulation technology, closed-loop adjustment, and uses large voltage feedback to significantly improve voltage stability. It uses high-performance high-power IGBT devices and driving technology, and according to electromagnetic compatibility theory, adopts special shielding, isolation, and grounding measures. This enables the DC high voltage generator to achieve high quality, portability, and withstand rated voltage discharge without damage. It features large output power, small size, reliable overvoltage, overcurrent, and zero-position closing protection functions, and a 0.75 times voltage switching function. Using new technologies, new materials, and new components, it has the characteristics of large output power, small size, and light weight, with reliable overvoltage, overcurrent, and zero-position closing protection functions, a 0.75 times voltage latching function, and is equipped with a time relay that can set timed audible alarms during testing. The entire instrument is easy to carry, simple to operate, safe, and reliable.
Mainly applicable to power departments, industrial, mining, metallurgical, steel and other enterprise power departments for DC withstand voltage tests or DC leakage current tests on high-voltage electrical equipment such as zinc oxide arresters, power cables, transformers, circuit breakers, and generators.
Scope of application:
1. Conductance current test of valve-type arresters.
2. DC withstand voltage test and leakage current measurement of power transformers.
3. DC withstand voltage test and leakage current measurement of high-voltage cables (35～500kV and below).
4. U1mA DC reference voltage test of zinc oxide arresters and leakage current test under 0.75U1mA.
ZGS DC high voltage generator features and advantages
1. High precision and accurate measurement. The voltmeter on the control box directly displays the voltage value applied to the load test object, eliminating the need for an external voltage divider and simplifying wiring. The instrument can measure leakage current at both high and low voltage ends. The high voltage end uses a circular shielded digital meter display, which is resistant to discharge impact and has good anti-interference performance, suitable for on-site use;
2. High voltage regulation stability, smooth voltage adjustment across the full range. The output voltage adjustment uses an imported single multi-turn potentiometer, ensuring a stable boosting process and high adjustment precision;
3. Negative polarity output, zero-start, continuously adjustable, with various protection functions such as overvoltage, overcurrent, return-to-zero, grounding protection, and unique open-circuit protection. The automatic protection circuit has strong functions, providing comprehensive and reliable protection for safe operation;
4. Manufactured with advanced technology and processes, pioneering the application of medium-frequency voltage doubling circuits, using advanced PWM high-frequency pulse width modulation technology and high-power IGBT devices, resulting in higher output high-voltage stability and smaller ripple coefficient;
5. Added high-precision 0.75UDC1mA function, bringing great convenience to DC high voltage generator testing;
6. Overvoltage setting uses a digital DIP switch, allowing the set voltage value to be displayed intuitively. The displayed value unit is kV, clear at a glance;
7. Fault sampling uses a dedicated sensor with nanosecond-level response time, and the optical isolation element is also nanosecond-level, allowing rapid and complete shutdown of the DC main circuit, thereby protecting the instrument from damage;
8. The voltage doubling cylinder is made of new materials, lightweight and sturdy. Three built-in support feet at the bottom increase the stability of the voltage doubling cylinder. The exterior is coated with special insulating materials, providing good electrical performance and strong moisture resistance;
9. The chassis is made of aluminum alloy, compact in size, lighter in weight, more aesthetically pleasing, more reliable, simple to operate, fully functional, and convenient for field use;
