DC Hipot

Our Product Features

High Precision & Accurate Measurement

The voltmeter on the control box directly displays the voltage applied to the test sample, eliminating the need for an external voltage divider.

The instrument measures leakage current at both high and low voltage ends.

A circular shielded digital meter on the high-voltage end ensures high resistance to discharge shocks and excellent anti-interference performance, making it suitable for on-site use.

Stable Voltage Regulation

The device ensures smooth voltage regulation across the entire range.

It uses an imported multi-turn potentiometer for precise output voltage control.

The boosting process is smooth and highly accurate.

Advanced Protection Functions

Features negative polarity output, zero-start, and continuous adjustability.

Includes overvoltage, overcurrent, zero-return, and grounding protection.

Unique disconnection protection ensures safety.

The automatic protection circuit is robust and reliable.

Cutting-Edge Technology

Uses an intermediate-frequency voltage-doubling circuit.

Employs the latest PWM high-frequency pulse-width modulation technology and high-power IGBT devices, enhancing voltage stability and reducing ripple factor.

0.75 UDC1mA Function

Specifically designed for the precise measurement of zinc oxide lightning arresters.

Digital Overvoltage Setting

Overvoltage settings use a digital dip switch for clear and precise adjustments (displayed in kV).

Ultra-Fast Fault Detection

Nanosecond-level sensors and optical isolation components detect faults within 10 microseconds, ensuring maximum protection of the instrument.

Lightweight & Durable Design

The double-pressure cylinder is made from new lightweight and durable materials.

Three concealed support feet provide increased stability.

The exterior features a special insulating coating with excellent electrical and moisture resistance.

Compact & Portable

The chassis is made of aluminum alloy, making it compact, lightweight, and highly durable.

Designed for easy operation and outdoor use.

 

Alternative Names for DC High Voltage Generator

DC High Voltage Generator

DC Hipot Tester

DC Hipot Test Kit 

DC Hipot

dc hipot test

dc high voltage tester

 

Selection of current for DC high-voltage generator
According to the test of zinc oxide lightning arrester, the required current to complete the test is only 1mA. If a normal DC high-voltage generator only completes the lightning arrester test, the conventional 2mA current can be selected.
For other currents of 3mA or above, we can choose a larger current based on factors such as loss and leakage to ensure that the test can be completed normally only after completing the withstand voltage of the cable and other equipment.

 

Technical Parameters

Uses a high-frequency voltage-doubling circuit with PWM pulse-width modulation technology and high-power IGBT devices.

Features voltage feedback for high output stability (ripple coefficient ≤ 1%).

Smooth, fine-tuned voltage regulation with an accuracy of ≤ 0.5%.

Stability of ≤ 1%, voltage and current error of 1% (reading ± 0.2kV), current error ± 1 digit.

The boost potentiometer starts at zero voltage.

75% UDC1mA function for zinc oxide lightning arresters, with 1% accuracy.

Digital dip switch for overvoltage settings (error ± 1%).

 

Core Component of DC Hipot Test Device
1. Control Unit
2. Voltage Multiplier Unit/Doubler Column
3. High Voltage Silicon Stacks
4. Filter Capacitor
5. Microammeter
6. Current Limiting Resistors

 

Advantages of DC Hipot Tester

High quality pressure doubling cylinder: using imported filter paper and advanced epoxy resin, poured through special processes, with high strength, good sealing, moisture resistance and durability, and small partial discharge.

High precision measurement: using digital voltmeter and microampere meter, the reading is intuitive and accurate, with an accuracy of up to 1.0%.

Complete safety protection: equipped with multiple protection functions (overvoltage, overcurrent, zero position, grounding, flashover) to ensure the safety of operators and equipment.

Easy to operate: intelligent control, fast boost, overcurrent protection value can be set arbitrarily, and equipped with remote control function.

Stable and reliable: adopting advanced technology and processes, high voltage stability, low ripple coefficient, and long-term stable operation.

 

Specific Purpose of DC Hipot Test Set

1. Power cable testing: The DC high voltage generator is used to test the insulation performance of power cables. By applying DC high voltage, the insulation resistance and absorption ratio of the cable are measured to determine whether the cable meets the operating standards.

2. Lightning arrester testing: Lightning arresters are important equipment used to protect power systems from overvoltage damage. The DC high-voltage generator can be used for leakage current testing of lightning arresters to ensure that they can operate normally under overvoltage conditions.

3. Generator and transformer testing: DC high voltage generators are used to conduct DC high voltage tests on generators and transformers to test their insulation strength and performance, ensuring the reliability of these devices in high voltage environments.

4. Switchgear testing: Switchgear such as circuit breakers, isolating switches, etc. play a control and protection role in the power system. DC high-voltage generators can be used to test the insulation performance and withstand voltage capability of these devices.

5. Testing of Zinc Oxide Surge Arrester: Zinc oxide surge arrester is a new type of surge arrester with high protection performance. A DC high voltage generator can provide stable DC high voltage for testing and calibration of zinc oxide lightning arresters.

6. Insulation strength testing of electrical equipment: DC high-voltage generators can also be used to test the insulation strength of various electrical equipment, such as insulators, insulation sleeves, etc., to ensure their safety and reliability under high voltage conditions.

7. Scientific research and teaching experiments: In the field of scientific research and teaching, DC high-voltage generators are also used for various high-voltage related experiments and research, helping researchers and students better understand the principles of high-voltage electricity.

 

Testing Process of the DC Hipot Voltage Tester

Preparation

Ensure the testing environment is dry, clean, and free of contaminants.

Confirm that the test object is powered off and properly grounded.

Connect the high-voltage output lead to the test object and ground the circuit lead.

Voltage Application

Gradually increase the DC test voltage to the desired level.

Maintain the test voltage for 1–5 minutes.

Monitor for abnormal leakage current fluctuations.

Pass/Fail Criteria

Pass – Leakage current remains stable and within an acceptable range.

Fail – Leakage current increases significantly or insulation breakdown occurs.

Test Completion & Discharge

Slowly reduce the voltage to zero.

Properly discharge the test object to prevent residual charge hazards.

Safely disconnect all test leads.

 

Operation Steps

Inspect all cables and connections before use.

Position the chassis and voltage doubler properly and connect grounding wires.

Set the overvoltage protection (typically 1.1 times the test voltage).

Turn on the power switch and begin voltage regulation.

Slowly increase the voltage to the required test level.

Monitor readings, listen for unusual sounds, and observe for abnormal conditions.

Reduce voltage to zero, turn off power, and disconnect all leads.

 

Maintenance Methods

Replace hydraulic oil and clean the oil tank every six months.

Ensure the cooling system activates automatically when oil temperature ≥ 45°C.

Clean the air filter regularly.

Check the oil filter signal light and clean the filter if the buzzer sounds.

Lubricate all mechanical transmission points.

Monitor oil levels and replenish recommended hydraulic oil as needed.

Inspect and maintain dust prevention devices.

 

Frequently Asked Questions (FAQ)
Q1: What are the applicable scenarios for DC hipot testers with different voltage levels?
A1: 30kV-60kV: Suitable for insulation testing of 10kV cables, low-voltage lightning arresters, insulators and other equipment; 120kV-200kV: Suitable for testing equipment such as 35kV and above cables, high-voltage lightning arresters, transformer bushings, etc; 200kV and above: Suitable for scientific research experiments, factory testing of high-voltage equipment, and other scenarios. For specific adaptation solutions, please consult Wuhan UHV Power Technology Co., Ltd.

Q2: How to determine whether the accuracy of the DC hipot tester meets the standard?
A2: There are two ways to confirm that the voltage accuracy, ripple factor, and other parameters meet the national standard requirements by viewing the equipment calibration report; Entrust professional institutions (such as Wuhan UHV) to conduct on-site calibration to avoid equipment "false calibration parameters" and ensure accurate test data.

Q3: Will the lightweight design of DC high-voltage generators affect equipment performance?
A3: No. High quality equipment adopts new materials and integrated design, which optimizes the internal air duct heat dissipation system and shielding performance while reducing volume and weight, achieving "weight reduction without loss of quality". For example, the portable equipment of Wuhan UHV adopts aluminum alloy chassis and intermediate frequency inverter circuit, which is easy to transport and can ensure output stability and heat dissipation efficiency, completely solving the problems of bulky and difficult transportation of traditional equipment.

 

As one of the leading dc hipot manufacturers and suppliers in China, we warmly welcome you to buy high-grade dc hipot made in China here from our factory. For price consultation, contact us.

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