DC High Voltage Generator DL/T848.1-2004
--
The DC high voltage generator is a new generation of portable high-voltage testing instrument designed and manufactured according to the latest Chinese power industry standard DL/T848.1-2004 "General Technical Conditions for High Voltage Test Devices Part 1: DC High Voltage Generators", specifically used to test the electrical insulation strength and leakage current of power devices.
This instrument adopts a high-frequency voltage doubling circuit, applies the latest PWM pulse width modulation technology and voltage-current dual closed-loop feedback technology to improve the power regulation rate and load regulation rate, 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 doubling cylinder more compact and lightweight, improving the overall efficiency of the machine. According to EMI electromagnetic interference and EMC electromagnetic compatibility theories, measures such as shielding, isolation, and grounding are adopted to enhance the safety of the entire machine, and it can withstand rated voltage discharge without damage. The instrument has comprehensive protection functions, including zero-position protection, overvoltage protection, overcurrent protection, and breakdown protection. The protection circuit uses nanosecond-level special sensors, which act quickly and reliably, effectively ensuring the safety of personnel and equipment. The overvoltage setting uses a digital dial switch, which is simple to operate and has high setting accuracy. An intelligent high-precision 0.75U function button is added, which is beneficial for testing zinc oxide arresters.
The instrument adopts an integrated design scheme: the voltage doubling cylinder and the main unit are placed in one chassis, combining the latest technology and selecting the latest components to achieve advantages such as small size, high power, light weight, convenient operation, safety and reliability, and high power output quality. It is an ideal testing instrument for the high-voltage testing industry.
Instrument Functions
This instrument is suitable for DC withstand voltage tests and leakage tests on zinc oxide arresters, magnetic blow arresters, power cables, transformers, generators, and other equipment in power, railway, chemical, industrial and mining, metallurgy, steel, and other departments. It can also be used as a power source for electrostatic dust collection, spraying, etc.
Executive Standards
| No. | Standard Name |
|---|---|
| 1 | DL/T848.1-2004 General Technical Conditions for High Voltage Test Devices Part 1: DC High Voltage Generators |
| 2 | DL/T596-2005 Preventive Test Procedures for Power Equipment |
| 3 | GB11032-2010 AC Gapless Metal Oxide Surge Arresters |
| 4 | GB/T 16927.1-2011 High Voltage Test Techniques Part 1: General Definitions and Test Requirements |
| 5 | DL/T474.2-2006 Guide for On-site Insulation Tests: DC High Voltage Tests |
| 6 | GB/T.311-2012 Insulation Coordination for High Voltage Transmission and Transformation Equipment |
Instrument Features
1. Stable output voltage: Adopts high-frequency voltage doubling circuit, applies the latest PWM pulse width modulation technology and voltage-current dual closed-loop feedback technology to improve the power regulation rate and
load regulation rate, resulting in high voltage stability and low ripple. Smooth voltage regulation across the full range, high output voltage accuracy. The main unit's voltmeter directly displays the voltage value loaded on the load
without the need for an external voltage divider, making wiring and operation simple. Voltage resolution 0.1kV, current resolution 1uA.
2. Comprehensive protection: Complete protection functions, including zero-position protection, overvoltage protection, overcurrent protection, and breakdown protection. The protection circuit uses nanosecond-level special sensors, acting
quickly and reliably, effectively ensuring the safety of personnel and equipment.
3. 0.75U function: Adds an intelligent high-precision 0.75U one-button function. Press this button, and the voltage and current automatically jump to the 0.75U state, which is beneficial for testing zinc oxide arresters.
4. Zero-start voltage increase: The voltage increasing potentiometer starts from zero, using an imported multi-turn potentiometer, ensuring smooth voltage increase and high adjustment precision.
5. Overvoltage setting: The overvoltage setting uses a digital dial switch, which is simple to operate and has high setting accuracy.
6. Integrated design: Adopts an integrated design scheme, placing the main unit and the voltage doubling cylinder in one chassis. Imported high-frequency high-voltage rectifier diodes are selected to make the voltage doubling cylinder compact,
improving overall efficiency and portability.
7. Reliable performance: Key components are selected from high-performance imported parts. The outer surface of the voltage doubling cylinder is coated with special insulating material, providing good electrical performance, strong moisture resistance, and no leakage.
8. Simple operation: The instrument interface has various function buttons, with reasonable layout and clear indications, making it easy to learn and use.
