The ZGF series DC high voltage generators are developed and manufactured in accordance with the requirements of the Chinese industry standard ZBF 24003-90 "General Technical Requirements for Portable DC High Voltage Generators". They are portable DC high voltage generators suitable for electric power departments, power departments of factories and mining enterprises, and scientific research units. , Railways, chemicals, power plants, etc. to conduct DC high voltage tests on zinc oxide arresters, magnetic blown arresters, power cables, generators, transformers, switches and other equipment.
ZGF series DC high voltage generator adopts high frequency voltage doubler circuit, firstly applies PWM high frequency pulse width modulation technology, closed loop adjustment, and adopts large voltage feedback, which greatly improves the voltage stability. Use high-performance high-power IGBT devices and their drive technology, and adopt special shielding, isolation and grounding measures according to the electromagnetic compatibility theory. The DC high-voltage generator realizes high-quality, portable, and can withstand the rated voltage discharge without damage.
The main components of the ZGF series DC high-voltage generator instrument are selected from the United States, Germany, Japan and other countries to make the instrument more reliable and stable. The pressure doubler barrel is developed and produced by German technology. The high-frequency transformer is specially designed by relevant experts. Small, large capacity, strong overload capacity, convenient for field operation test.
1. Small size, light weight, beautiful and reliable, easy to operate, complete functions, easy to use in the field
2. Manufactured using advanced technology, using PWM high-frequency pulse width modulation technology, pulse train logic array modulation, using high-power IGBT devices, using high-frequency technology to increase the frequency, the frequency is up to 100kHz, so that the output high voltage stability is higher, and the ripple The coefficient is smaller.
3. According to the maintenance-free design, the main components are all imported components from the United States, Germany, Japan and other countries, which are durable and are not afraid of continuous direct short-circuit discharge to the ground.
4. High precision and accurate measurement. Both the voltage and current meters are digitally displayed, the voltage resolution is 0.1kV, and the current resolution is 0.1uA. The voltmeter on the control box directly displays the voltage value added to the load test sample. There is no need to add a voltage divider when using it, and the wiring is simple. The instrument has high and low voltage ends to measure the leakage current, and the high voltage end adopts a circular shielded digital meter to display, which is not afraid of discharge shock, has good anti-interference performance, and is suitable for on-site use.
5. High voltage regulation stability, full range smooth voltage regulation, the output voltage regulation adopts imported single multi-turn potentiometer, the boosting process is stable, the regulation precision is high, and it is designed with coarse and fine adjustment functions. The voltage adjustment accuracy is better than 0.1%, the voltage and current measurement error is less than 1.0%, and the pulsation factor is better than 0.5%.
6. Negative polarity output, zero start, continuously adjustable, with various protection functions such as over voltage, over current, zero return, grounding protection, and special disconnection protection. The automatic protection circuit has strong functions, complete and reliable protection, safe operation, and various technical indicators are better than industry standards
7. The function of high-precision 75%VDC/1mA is added, which brings great convenience to the measurement of zinc oxide arresters. No need to calculate with just one click. There is a 75% voltage function button on the control box of this instrument. When doing a lightning arrester test, when the current rises to 1000uA, turn on the 0.75 button. At this time, the value displayed by the voltmeter and ammeter is 75% of the data. After that, immediately return the boost knob to the zero position, and at the same time return the fine voltage knob to the zero position, and immediately press the green button to cut off the high voltage and turn off the power switch. Do other experiments.
8. Convenient over-voltage setting function, adopting digital dial switch, can display the setting voltage value intuitively, making your operation more casual, and the unit of display value is kV.
9. The pressure doubling cylinder can be divided into sections, and it can be used on site, which is flexible and convenient. One machine has multiple functions and is economical.
10. There are three built-in support feet at the bottom to increase the stability of the pressure doubler.