Tan Delta Test Set

Why is Tan Delta Testing Important?

1. Early Detection of Insulation Faults

Identifies moisture absorption, aging, and contamination before they cause failures.

Helps in scheduling preventive maintenance to avoid costly breakdowns.

2. Reliable and Non-Destructive Testing

Allows testing without dismantling equipment, reducing downtime.

Provides accurate and reproducible measurements for long-term insulation monitoring.

3. Compliance with International Standards

Ensures insulation health in accordance with international standard.

Helps industries meet regulatory safety and performance requirements.

 

Product Features for Tan Delta Test Set

1.Equipped with CVT self-excited testing mode – enables simultaneous measurement of capacitance and tan δ (dissipation factor) for C1 and C2 with a single connection.

2.Reverse wiring low-voltage shielding function – allows 10kV reverse wiring dielectric loss measurement on C11 without disconnecting the wire when the CVT bus is grounded.

3.Supports external voltage and CN measurement.

4.Multi-channel simultaneous measurement – enables the dielectric loss testing of four different test samples at the same time.

5.Utilizes frequency conversion technology – effectively eliminates 50Hz power frequency interference, ensuring accurate measurements even in strong electromagnetic environments.

6.Overcurrent protection – prevents instrument damage in case of a short circuit or test sample breakdown.

7.Grounding protection – the instrument does not operate if grounding is poor or absent, ensuring safety.

8.Integrated standard capacitors and high-voltage power supply – simplifies on-site testing and minimizes wiring complexity.

9.Large LCD screen display – provides an easy-to-use interface with Chinese character menu prompts to guide the operator.

10.uilt-in wiring diagrams for each functional interface – making it easier for operators to set up the test connections correctly.

11.Supports English operation interface.

12.Compatible with both low and high-voltage testing – suitable for high-voltage equipment ranging from 1kV to 500kV.

 

Alternative Names

Transformer Tan Delta Tester

Tan Delta Tester

Tan Delta Test Equipment

Transformer Dissipation Factor Tester

Dissipation Factor Tester

Transformer Dielectric Loss Tester

Dielectric Loss Tester

 

Application of Tan Delta Test Set

1. Power Generation, Transmission, and Distribution

Purpose:

Prevent insulation faults in high-voltage electrical assets.

Power Plants

Evaluate generator windings and transformer insulation.

Detect early signs of thermal aging and oil contamination.

Substations

Test circuit breaker bushings, instrument transformers, and switchgear.

Ensure the safe operation of high-voltage equipment under extreme conditions.

High-Voltage Cables

Identify moisture intrusion, insulation cracks, and cable aging.

Reduce unexpected failures in underground and overhead power lines.

 

2. Industrial and Commercial Power Systems

Purpose:

Protect motors, switchgear, and transformers in industrial applications.

Manufacturing Plants & Refineries

Prevent unexpected shutdowns caused by insulation failure.

Ensure safe operation of heavy-duty motors, conveyor belts, and automation systems.

Data Centers & IT Infrastructure

Protect critical power transformers and UPS systems.

Prevent voltage fluctuations that may cause data loss or equipment failure.

 

3. Electrical Maintenance and Troubleshooting

Purpose:

Reduce unplanned downtime and extend equipment lifespan.

Predictive Maintenance in Substations

Identify early-stage insulation degradation before a fault occurs.

Schedule timely maintenance to avoid costly power outages.

Fault Diagnosis & Root Cause Analysis

Detect short circuits, moisture damage, and dielectric breakdown.

Reduce downtime by identifying faults without dismantling the equipment.

 

4. Renewable Energy Systems (Wind, Solar, Hydro)

Purpose:

Maintain insulation reliability under fluctuating loads.

Wind Power Generators

Detect insulation wear caused by high vibration and temperature fluctuations.

Ensure smooth operation of step-up transformers and grid connections.

Solar Power Plants

Evaluate insulation performance of inverters and transformers exposed to extreme weather conditions.

Prevent insulation aging from reducing efficiency.

Hydropower Stations

Check generator windings for water ingress.

Identify early-stage insulation degradation in harsh environments.

 

Advantages
High sensitivity: able to detect small insulation degradation.

High accuracy: Using digital signal processing technology, the measurement results are accurate and reliable.

High degree of automation: The testing process is automated and easy to operate.

Strong adaptability: Suitable for devices of various voltage levels.

 

Precautions for use
1. The tan delta test set can only be used on equipment that is powered off, and the grounding terminal should be reliably connected to the grounding grid.
2. Determine which wiring method to use based on the device's condition and select the corresponding wiring method from the menu options.
3. Select the appropriate test voltage level based on different devices and choose the desired voltage from the corresponding menu options.
4. When conducting experiments on large capacitance test samples, the grounding of the instrument and the grounding of the test sample should not be at the same grounding point to prevent the safety of the instrument from being affected by the rebound voltage or flowing waves during grounding discharge.
5. The tan delta test set comes with a boost device, so attention should be paid to the insulation distance of the high-voltage leads and personnel safety.
6. The tan delta tester should be reliably grounded, as poor grounding may cause machine protection or pose a danger.
7. After the tester is started, except for special circumstances, it is not allowed to suddenly turn off the power to avoid overvoltage damage to the equipment.

 

Innovation Direction of Tan Delta Test Set
Intelligent upgrade: Develop an intelligent control system with self-learning function, which can automatically optimize test parameters and processes, and improve defect recognition accuracy. By using machine learning algorithms to analyze historical data, establish insulation performance degradation models, and achieve preventive maintenance.
Digital twin technology: Building a digital twin model of equipment, associating partial discharge signals with environmental parameters such as temperature, humidity, and vibration, to achieve early warning of insulation degradation. This technology has been successfully applied in a chemical industrial park, and three hidden insulation defects were detected in advance.
New energy adaptation: Develop specialized testing solutions for wind power, photovoltaic and other new energy equipment to solve testing difficulties in special environments such as high altitude and strong vibration. The company's products have been widely used in new energy fields such as wind power and photovoltaics.
Green and energy-saving design: using low loss materials and efficient cooling systems to reduce equipment operating energy consumption. Develop a solar powered version to meet the testing needs in non powered environments and implement the concept of green manufacturing.

 

FAQ

1. What power equipment is the variable-frequency dielectric loss tester mainly used to test?

It is mainly used for insulation performance testing of high-voltage power equipment such as generators, transformers, switchgear, and cables.

2. Is a higher or lower tanδ value better?

The lower the tanδ value, the lower the dielectric loss of the insulating material and the better its insulation performance.

3. Why is “variable frequency” needed during testing?

At different frequencies, the dielectric loss characteristics of insulating materials differ. Variable-frequency testing can more comprehensively reflect the true state of the insulation and help distinguish different types of defects.

4. What effect does testing in a humid environment have on the results?

High humidity increases leakage on the insulation surface, which causes the tanδ value to rise and affects test accuracy. Therefore, when testing in a humid environment, certain protective measures need to be taken.

5. Besides the tan delta test set, what other methods can be used to evaluate the insulation condition of power equipment?

Comprehensive assessment can also be carried out through partial discharge detection, DC leakage current testing, infrared thermal imaging, and other methods.

6. Do you have experience exporting Transformer Tan Delta Testers?

Yes. We have rich experience in exporting electrical testing equipment and can provide professional support for overseas customers, including product selection, technical consultation, export packaging, shipping coordination and after-sales technical support.

7. Can you provide product information in English?
Okay. We can provide English product manuals, operation manuals, technical parameters, and related materials to facilitate overseas customers in product selection, installation, and operation.

8. Can you provide factory inspection reports and calibration certificates?
Okay. Before leaving the factory, the equipment will undergo relevant functional and performance checks, and corresponding factory testing data, calibration or inspection certificates can be provided according to customer requirements.

 

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

Professional Transformer DGA Gas Chromatograph