NDZGF Series DC High Voltage Generator

Product Introduction

        DC High Voltage Generator is a new generation of portable high-voltage testing instruments designed and manufactured according to China's new power industry standard DL/T848.1-2004 "General Technical Conditions for High Voltage Test Devices Part 1: DC High Voltage Generators". It is specifically used to test the electrical insulation strength and leakage current of power devices.

       This instrument adopts a high-frequency voltage multiplier circuit, utilizing the latest PWM pulse width modulation technology and voltage-current dual closed-loop feedback technology to improve power supply regulation and load regulation, resulting in high voltage stability and low ripple. It uses imported high-power IGBT devices and their driving technology to eliminate switching interference, achieving high quality and portability of the DC high voltage generator. Imported high-frequency high-voltage rectifier diodes are selected to make the voltage multiplier cylinder more compact and lightweight, enhancing overall efficiency.

       Based on EMI electromagnetic interference and EMC electromagnetic compatibility theory, measures such as isolation and grounding are adopted to improve overall safety, enabling it to withstand rated voltage discharge without damage. The instrument features comprehensive protection functions, including zero-position protection, overvoltage protection, overcurrent protection, and breakdown protection. The protection circuit uses nanosecond-level specialized sensors, ensuring rapid and reliable operation to effectively safeguard personnel and equipment safety. Overvoltage setting employs digital dial switches, offering simple operation and high setting accuracy. An intelligent high-precision 0.75U function button is added to facilitate testing of zinc oxide arresters.

       This instrument adopts an integrated design: the voltage multiplier cylinder and the main unit are housed in one chassis. Combining new technology and selected new components, it achieves advantages such as small size, high power, light weight, easy operation, safety, reliability, and high-quality power output, making it an ideal testing instrument in the high-voltage testing industry.

       This instrument is suitable for DC withstand voltage tests and leakage tests on equipment such as zinc oxide arresters, magnetic blow arresters, power cables, transformers, and generators in sectors including power, railways, chemicals, industrial and mining, metallurgy, and steel. It can also serve as a power source for electrostatic dust collection, spraying, etc.

Product Features

☆、Stable output voltage: Adopts a high-frequency voltage multiplier circuit, utilizing the latest PWM pulse width modulation technology and voltage-current dual closed-loop feedback technology to improve power supply regulation and load regulation, resulting in high voltage stability and low ripple.

☆、Smooth voltage regulation across the full range, with high output voltage accuracy. The main unit's voltmeter directly displays the voltage value applied to the load, eliminating the need for an external voltage divider and simplifying wiring operations. Voltage resolution: 0.1kV, current resolution: 1uA.

☆、Comprehensive protection: Features complete protection functions, including zero-position protection, overvoltage protection, overcurrent protection, and breakdown protection. The protection circuit uses nanosecond-level specialized sensors, ensuring rapid and reliable operation to effectively safeguard personnel and equipment safety.

☆、0.75U function: Added an intelligent high-precision 0.75U one-button function. Pressing this button automatically switches voltage and current to the 0.75U state, facilitating testing of zinc oxide arresters.

☆、Zero-start voltage rise: The voltage rise potentiometer starts from zero, using imported multi-turn potentiometers for a smooth voltage rise process and high adjustment accuracy.

☆、Overvoltage setting: Overvoltage setting employs digital dial switches, offering simple operation and high setting accuracy.

☆、Integrated design: Adopts an integrated design, with the main unit and voltage multiplier cylinder housed in one chassis. Imported high-frequency high-voltage rectifier diodes are selected to make the voltage multiplier cylinder compact, enhancing overall efficiency and portability.

☆、Reliable performance: Key components use high-performance imported elements. The voltage multiplier cylinder is coated with special insulating material, offering excellent electrical performance, strong moisture resistance, and no leakage.

☆、Easy operation: The instrument interface features well-laid-out function keys with clear indicators, making it easy to learn and use.

Technical Parameters

Power Supply         50Hz  220V             ±10％              

Voltage Measurement         Digital Display ±1％              1 Digit                 

Current Measurement         Digital Display ±1％              1 Digit

Voltage Stability       Random Fluctuation, When Power Voltage ±10％  ≤1‰

If higher stability is required, it can be customized to ≤0.1‰

DC High Voltage          Ripple Factor ≤ 1％   

Operating Mode         Intermittent Use 30 Minutes

Ambient Temperature         -10℃≈50℃

Relative Humidity         ＜90％ No Condensation at 25℃

Altitude          Below 1500m