DC Hipot
Our company has been specializing in the production and manufacturing of frequency series resonance devices for 21 years. We operate a modern intelligent factory covering over 4000 square meters, equipped with more than 100 automated production, manufacturing, assembly, and testing machines. We have obtained CE certification and currently serve the over the word customers .
Our DC high voltage generator provides a high-voltage DC source specifically designed to test the electrical insulation strength and leakage current of power devices. It evaluates the dielectric strength of electrical equipment and detects insulation defects, leakage currents, and potential breakdown points in cables, transformers, motors, switchgear, and other high-voltage electrical systems.
Scope of application
1. Conductivity current test of valve type lightning arrester.
2. DC withstand voltage test and leakage current measurement of power transformers.
3. DC withstand voltage test and leakage current measurement of high-voltage cables (35-500kV and below).
4. U1mA DC reference voltage test and 0.75U1mA leakage current test for zinc oxide lightning arrester.
Selection reference – Select according to substation voltage level
|
Substation voltage level kV |
10 |
35 |
66 |
110 |
220 |
330 |
|
Maximum test voltage kV |
47 |
105 |
135 |
192 |
305 |
More than 400 |
|
Equipment selection kV / mA |
ZGF - 60 / 2 |
ZGF - 120 / 2 |
ZGF - 200 / 2 |
ZGF - 200 / 2 |
ZGF - 400 / 3 |
ZGF - 800 / 10 |
Why Choose Us?
Quotation within 1 hour – Solution within 24 hours
Product demonstration available - Strict contract performance – On-time delivery
12-month warranty – Optional extended warranty
Factory acceptance testing – Authorized calibration (optional) -
Worldwide training support – Regular follow-up visits
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%).
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.
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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