DC Hipot Tester

UHV DC hipot tester is a high-voltage test instrument used to test the withstand voltage performance of electrical equipment and insulating materials. It checks the insulation strength, withstand voltage performance and leakage of the equipment or components under test by applying a DC high voltage higher than the rated working voltage to ensure that the electrical equipment will not have electrical breakdown or leakage accidents during operation.

High-precision Measurement 
The voltage and current measurement accuracy of the DC hipot tester are both ±1.0%. This level of accuracy far exceeds the ±2% or ±3% accuracy testers commonly found on the market. When measuring 1000V voltage, our maximum error is ±12V, while the ±2% accuracy of competing products can reach ±20V. 

Strong Voltage Stability 
When the power supply voltage fluctuates within the range of ±10%, the output voltage of our DC hipot tester does not change by more than ±1%. In contrast, the output fluctuation of many similar products on the market can reach ±2% or even higher. 

Strong Overload Capacity 
The DC hipot tester can withstand a no-load voltage not exceeding 10% of the rated voltage for 10 minutes, and the maximum charging current can reach 1.25 times the rated current. In comparison, the overload capacity of most similar products on the market is usually only 1.1 times the rated value, and the duration is also shorter (about 5 minutes). 

FAQs
1. What output voltage ranges are available?

UHV DC Hipot Testers are available in multiple voltage ratings to meet different testing requirements, including 30kV, 40kV, 60kV, 80kV, 120kV, 200kV and higher customized configurations. They are suitable for testing power cables, transformers, switchgear, motors, generators, surge arresters, and other high-voltage electrical equipment.

Our systems provide stable DC output with smooth voltage regulation and are designed for both laboratory and field applications.

2. How does UHV ensure testing safety?

Safety is one of the most important considerations in high-voltage testing.

UHV DC Hipot Testers incorporate multiple protection mechanisms, including:

• Over-voltage protection
• Over-current protection
• Breakdown protection
• Zero-start interlock protection
• Grounding protection
• Emergency shutdown
• Audible and visual alarms
• Timed test control

These features help protect both operators and tested equipment during high-voltage testing procedures.

3. What is the leakage current measurement accuracy?

Accurate leakage current measurement is essential for evaluating insulation condition.

UHV DC Hipot Testers provide high-precision current monitoring with measurement accuracy typically better than ±1%, allowing users to detect insulation deterioration and identify potential defects before failures occur. The system continuously displays voltage and leakage current values throughout the test.

4. What are the voltage stability and ripple specifications?

Stable output voltage and low ripple are critical for obtaining reliable test results.

UHV DC Hipot Testers feature:

• Voltage indication accuracy better than 1%
• Ripple factor ≤0.5%
• High-voltage stability under varying load conditions

The low ripple design helps improve measurement accuracy and ensures compliance with demanding high-voltage testing requirements.

5. Does the DC Hipot Tester include an automatic discharge function?

Yes.

After testing, residual charges may remain stored in capacitive loads such as power cables and large electrical equipment.

UHV DC Hipot Testers are equipped with automatic discharge capability and protective grounding measures to safely release stored energy after the test is completed, helping reduce risks to operators and equipment.

6. Which IEC and IEEE standards does the tester comply with?

UHV equipment is designed according to internationally recognized high-voltage testing principles and can be used in accordance with applicable standards, including:

• IEC 60060 High-Voltage Test Techniques
• IEC 60270 Partial Discharge Measurement (related applications)
• IEC 60502 Power Cable Testing
• IEEE 400 Cable Testing Guide
• IEEE 95 DC High-Voltage Testing Practices
• IEC 61010 Safety Requirements for Test Equipment

Specific compliance documentation can be provided based on project requirements.

7. Is a calibration certificate provided?

Yes.

Each UHV DC Hipot Tester undergoes factory calibration before shipment.

We can provide:

• Factory Calibration Certificate
• Test Report
• Calibration Data Sheet
• Third-Party Calibration (upon request)
• Traceable Calibration Services for special projects

This ensures measurement accuracy and traceability throughout the equipment lifecycle.

8. Does the DC Hipot Test Set support data recording and report generation?

Depending on the model selected, UHV systems can support:

• Test data storage
• Historical record management
• USB data export
• PC software communication
• Automatic report generation
• Test result analysis

These functions are especially valuable for utility companies, EPC contractors, and third-party testing organizations that require complete documentation and traceability.

9. Is the tester portable for field testing?

Absolutely.

UHV designs its DC Hipot Testers with field applications in mind.

Key advantages include:

• Compact structure
• Lightweight design
• Easy transportation
• Fast setup and operation
• Suitable for substations and on-site commissioning projects

The equipment is widely used by power utilities, EPC contractors, and maintenance teams conducting field tests in demanding environments.

10. What after-sales service and technical support does UHV provide?

UHV provides comprehensive pre-sales and after-sales support worldwide.

Our services include:

• Product selection consultation
• Application guidance
• Remote technical support
• User training
• Installation assistance
• Operation manuals and videos
• Spare parts supply
• Warranty service
• Lifetime technical support

Our experienced engineering team responds quickly to customer inquiries and helps ensure successful operation throughout the equipment's service life.

UHV Advantage Summary

• Output voltage up to 200kV+ customized solutions
• Leakage current accuracy better than ±1%
• Ripple factor ≤0.5%
• Multiple safety protection systems
• Automatic discharge capability
• IEC & IEEE compliant testing solutions
• Factory calibration certificates included
• Data storage and report management options
• Portable design for field use
• Global technical support and after-sales service
  
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