1. overview
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 Testing Devices Part 1: DC High Voltage Generator", which is specially used to detect the electrical insulation strength and leakage current of power devices.
The instrument uses high frequency voltage multiplier circuit, the latest PWM pulse width modulation technology and voltage and current double closed loop feedback technology to improve the power supply adjustment rate and load adjustment rate, so that the voltage stability is high and the ripple is small. Imported high-power IGBT device and its driving technology are used to eliminate switching interference and realize high quality and portability of DC high-voltage generator. The imported high frequency and high voltage rectifier diode is selected to make the pressure multiplier smaller and lighter, and improve the efficiency of the whole machine. According to EMI and EMC theory, shielding, isolation and grounding are adopted to improve the safety of the whole machine, and it can withstand rated voltage discharge without damage. Instrument protection function is complete, with zero protection, over-voltage protection, over-current protection, breakdown protection, protection circuit selection of special nanosecond sensor, fast and reliable action, effective protection of personal and equipment safety. Digital dial switch is used for overvoltage setting, which is simple to operate and has high setting accuracy. Intelligent and high precision 0.75U function button is added to facilitate the test of zinc oxide arrester.
This instrument adopts an integrated design scheme: the pressure multiplier cylinder and the main engine are placed in a chassis, combined with the latest technology and the latest devices, realizing the advantages of small size, large power, light weight, easy operation, safety and reliability, and high power output quality. It is an ideal testing instrument for high-voltage testing industry.
2. Instrument function
This instrument is suitable for DC withstand voltage test and leakage test of zinc oxide arrester, magnetic blown arrester, power cable, transformer, generator and other equipment in electric power, railway, chemical industry, mining, metallurgy, steel and other departments. It can also be used as electrostatic dust collection, spraying and other power sources.
3. Implementation criteria
Serial number
Standard name
One
General Technical Conditions for DL/T848.1-2004 High Voltage Test Devices Part 1: DC High Voltage Generator
Two
DL/T596-2005 Preventive Test Rules for Electric Power Equipment
Three
GB11032-2010 AC Gapless Metal Oxide Arrester
Four
GB/T 16927.1-2011 High Voltage Test Technology Part 1: General Definitions and Test Requirements
Five
DL/T474.2-2006 Field Insulation Test Implementation Guidelines: DC High Voltage Test
Six
Insulation coordination of high voltage transmission and transformation equipment GB/T.311-2012
