The GDZGF-A series DC High Voltage Generator adopts a high-frequency voltage doubling circuit, applies the latest PWM high-frequency pulse width modulation technology, closed-loop adjustment, and uses large voltage feedback, greatly improving voltage stability. It uses high-performance high-power IGBT devices and their driving technology, and according to electromagnetic compatibility theory, adopts shielding, isolation, and grounding measures. This makes the DC high voltage generator advanced, portable, and able to withstand rated voltage discharge without damage. The high-frequency DC high voltage generator is suitable for DC high voltage testing of zinc oxide arresters, magnetic blow arresters, power cables, generators, transformers, switches, and other equipment in power departments, factory and mining enterprise power departments, scientific research units, railways, chemical industries, power plants, etc. It is the most ideal replacement product in the new century.
【DC High Voltage Generator Instrument Features】
1. Small size, light weight, more beautiful, safer, easy to operate, and multifunctional, convenient for field use, it is the most ideal new product in the new century.
2. Adopts advanced technology and craftsmanship, applies the latest PWM high-frequency pulse width modulation technology and pulse train logic array modulation, uses high-power IGBT devices, uses high-frequency technology to increase frequency up to 100kHz, resulting in higher output high voltage stability and smaller ripple coefficient.
3. High precision and accurate measurement. Voltage and current are digitally displayed, with voltage resolution of 0.1kV and current resolution of 0.1uA. The voltmeter on the control box directly displays the voltage value applied to the load test object, no external voltage divider is needed, and wiring is simple. The instrument has high and low voltage end leakage current measurement, the high voltage end uses a circular shielded digital meter display, not afraid of discharge impact, good anti-interference performance, suitable for on-site use.
4. High voltage adjustment stability, smooth voltage regulation across the full range, output voltage adjustment uses a single multi-turn potentiometer, smooth boosting process, high adjustment precision, and is designed with coarse and fine adjustment functions. Voltage adjustment accuracy up to 0.1%, voltage and current measurement error less than 1.0%, ripple factor less than 0.5%.
5. Negative polarity output, zero-start, continuously adjustable, with overvoltage, overcurrent, return-to-zero, grounding protection, and open-circuit protection functions. The automatic protection circuit is reliable, with complete protection, making operation safe, and all technical indicators meet industry standards and advanced products.
6. Added 75% VDC-1mA function, bringing great convenience to zinc oxide arrester measurement. With a light press, no calculation is needed. The control box has a 75% voltage function key. When doing the arrester zinc oxide test, when the current rises to 1000uA, press the 0.75 button, then the values displayed on the voltmeter and ammeter are the 75% data. After completion, immediately return the boosting knob to the zero position, and also return the fine voltage adjustment knob to the zero position, and immediately press the green button to cut off high voltage and turn off the power switch. Then proceed with other tests.
7. Convenient overvoltage setting function, using digital dial switches, can directly display the set voltage value, making operation more flexible, with the display unit in kV. 8. The voltage doubling cylinder has a segmented structure, convenient for on-site use, flexible, one machine with multiple uses, economical and practical.
【DC High Voltage Generator Usage Precautions】
1. Personnel using the high-frequency DC high voltage generator must be qualified personnel with a "High Voltage Test Work Permit".
2. When using this instrument, users must comply with Article 168 of the "Electric Power Safety Regulations" and add two obvious disconnection points before the working power enters the test device. When replacing test objects and wiring, first clearly disconnect the two power disconnection points.
3. Before testing, check whether all test wiring, control box, voltage doubling cylinder, and test object grounding wires are properly connected. The test circuit grounding wire should be connected at one point according to the requirements of the instrument manual.
4. For discharging large capacitance test objects, use a dedicated discharge resistor rod to discharge the test object. When discharging, do not immediately contact the test object with the discharge rod; first gradually approach the test object until at a certain distance the air gap begins to ionize and discharge, with a hissing sound. When there is no sound, the discharge rod can be used for discharge, and finally directly connect to the ground wire for discharge.
5. When DC high voltage is 200KV and above, even if test personnel wear insulating shoes and are in a safe distance area, due to the influence of the spatial electric field distribution of high-voltage DC ions, several nearby standing individuals may carry different DC potentials. Test personnel should not shake hands with each other or touch grounding bodies with their hands, otherwise there may be a slight electric shock phenomenon. This phenomenon is more obvious in dry areas and winter, but due to the small energy, it generally does not cause harm to the human body.
6. The power supply is AC220V±10%, 50Hz. If the power supply passes through a 1/1 isolation transformer or uses on-site self-generated power, then one point of the power supply must be artificially connected to the earth.
