The DC high voltage tester is a new generation of portable DC high voltage tester designed and manufactured according to the new Chinese power industry standard DL/T848.1-2004 "General Technical Conditions for DC High Voltage Generators". It is mainly suitable for DC withstand voltage tests on high-voltage electrical equipment such as zinc oxide arresters, power cables, transformers, and generators in power departments, industrial and mining enterprises, metallurgy, steel and other enterprise power departments.
Three-Level Undertaking Intelligent DC High Voltage Generator adopts high-frequency voltage doubling circuit, applies PWM high-frequency pulse width modulation technology, closed-loop adjustment, and uses large voltage feedback to greatly improve voltage stability. It uses high-power IGBT devices and their driving technology, and according to electromagnetic compatibility theory, adopts special shielding, isolation and grounding measures, so that the DC high voltage generator achieves high quality, portability, and can withstand rated voltage discharge without damage.
Three-Level Undertaking Intelligent DC High Voltage Generator Product Features
1. The product is small in size, light in weight, more beautiful, more reliable, easy to operate, complete in functions, and convenient for field use.
2. The product adopts professional technology and process manufacturing, applies PWM high-frequency pulse width modulation technology, pulse train logic array modulation, uses high-power IGBT devices, uses high-frequency technology to increase frequency up to 100kHz, thereby making the output high voltage more stable and the ripple coefficient smaller.
3. The product has 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, so no external voltage divider is needed during use, and wiring is simple. The instrument has high and low voltage terminals to measure leakage current. The high voltage terminal uses a circular shielded digital display, which is not afraid of discharge impact, has good anti-interference performance, and is suitable for on-site use.
4. The product has high voltage adjustment stability, smooth voltage regulation over the full range. The output voltage adjustment uses a single multi-turn potentiometer, the boosting process is stable, the adjustment precision is high, and coarse and fine adjustment functions are designed. The voltage adjustment degree is better than 0.1%, the voltage and current measurement error is less than 1.0%, and the ripple factor is better than 0.5%.
5. The product has negative polarity output, zero start, continuous adjustment, and various protection functions such as overvoltage, overcurrent, return to zero, grounding protection, and special disconnection protection. The automatic protection circuit has strong functions, complete and reliable protection, making operation safe.
6. A high-precision 75% VDC-1mA function is added, which brings convenience to zinc oxide arrester measurement. A light press without calculation. The control box of this instrument has a 75% voltage function key. When doing the zinc oxide arrester test, when the current rises to 1000uA, open the 0.75 button. At this time, the values displayed on the voltmeter and ammeter are the 75% data. After completion, immediately return the boosting knob to zero, and also return the fine-tuning voltage knob to zero, and immediately press the green button to cut off the high voltage and turn off the power switch. Then do other tests.
7. The DC high voltage generator has a convenient overvoltage setting function, using a digital thumbwheel switch, which can visually display the set voltage value, making your operation more casual, and the displayed value unit is kV.
8. The voltage doubling cylinder of the DC high voltage generator can be divided into sections, which is flexible and convenient for field use, one machine with multiple uses, and economical. The bottom is equipped with three built-in support feet, which increases the stability of the voltage doubling cylinder.
