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.

Rated voltage (KV):One hundred and twenty

Rated Current (mA):Two

Rated power (W):Two hundred and forty

Whole machine quality (kg):Ten

Whole body volume (mm):565×390×190

Height of pressure doubler (mm)：Five hundred and thirty-five

Output Voltage Accuracy：(+1.0% reading +2 words)

Output Current Accuracy：(+1.0% reading +2 words)

Ripple coefficient：Less than 0.5%

Operation mode:Intermittent use, rated load 30 minutes

Overload capacity:No-load voltage can exceed 10% of rated voltage for 10 minutes

Maximum charging current is 1.25 times rated current

Power Supply:AC220V + 10% 50HZ

work environment

Temperature: - 10 - 40 C

Relative humidity: no more than 85% at 25 C (no condensation)

Elevation: below 1500 meters

Executive standard

General Technical Conditions for DL/T848.1-2004 High Voltage Test Devices Part 1: DC High Voltage Generator

DL/T596-2005 Preventive Test Rules for Electric Power Equipment

B11032-2010 AC Gapless Metal Oxide Arrester

GB/T 16927.1-2011 High Voltage Test Technology Part 1: General Definitions and Test Requirements

DL/T474.2-2006 Field Insulation Test Implementation Guidelines: DC High Voltage Test

Insulation coordination of high voltage transmission and transformation equipment GB/T.311-2012

1. Output voltage stability: high frequency voltage doubling circuit, the latest PWM pulse width modulation technology and voltage-current double closed-loop feedback technology are used to improve the power supply regulation rate and load regulation rate, so that the voltage stability is high and the ripple is small. Full range smooth voltage regulation, high accuracy of output voltage. The host voltmeter directly displays the voltage value loaded on the load without additional voltage divider, and the wiring operation is simple. Voltage resolution is 0.1kV and current resolution is 1uA.

2. Comprehensive protection: complete protection function, with zero protection, over-voltage protection, over-current protection, breakdown protection, protection circuit selection of special nanosecond sensors, fast and reliable action, effective protection of personal and equipment safety.

3.0.75U Function: Add a button with intelligent high precision 0.75U function, press this button, voltage and current automatically jump to 0.75U state, which is conducive to the test of zinc oxide arrester.

4. Zero boost: Boost potentiometer zero boost, using imported multi-loop potentiometer, boost process is stable, high regulation accuracy.

5. Overvoltage setting: Digital dial switch is selected for overvoltage setting, which is easy to operate and has high setting accuracy.

One-in-one design: choose one-in-one design scheme, the main engine and pressure multiplier cylinder are placed in a chassis. The imported high frequency and high voltage rectifier diode is selected to make the pressure multiplier smaller, improve the efficiency of the whole machine and be easy to carry.

7. Reliable performance: Imported components with high performance are selected as key components, and special insulating materials are coated on the surface of the pressure multiplier cylinder. It has good electrical performance, strong moisture-proof ability and no leakage.

8. Easy to operate: Functional keys in the instrument interface, reasonable layout, clear instructions, easy to learn and use.