Your Professional Transformer Test Equipment Supplier
Founded in 1992 and formally incorporated as Wuhan Moen Intelligent Electrical Co., Ltd. on November 12, 2012, with a registered capital of RMB 36 million, we are a professional technology company specializing in the research, development, and production of high-voltage test equipment. Our 8,000 m² facility in Wuhan East Lake High-Tech Development Zone houses dedicated production lines, R&D centers, and administrative facilities. With an experienced technical and production team, Moen focuses on core products including test transformers, series resonance systems, and other high-voltage testing equipment. Backed by years of industry experience, the company is committed to reliable manufacturing, continuous technical improvement, and providing practical solutions for global power utility and industrial customers.
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![Handheld Transformer Turns Ratio Group Tester]()
Handheld Transformer Turns Ratio Group TesterThis handheld transformer turns ratio tester is ultra lightweight, compact, and extremely practical for on site work. It supports one time wiring to finish turns ratio, group, polarity, angle -
![High Power DC Winding Resistance Tester]()
High Power DC Winding Resistance Tester50A high power three-phase tester with 75μΩ~25kΩ range, 380V wrong connection protection, emergency stop, grounding alarm, for ultra-large transformer. -
![Integrated Transformer Winding Resistance Tester]()
Integrated Transformer Winding Resistance Tester20A integrated tester supporting three-phase test, magnetic assist and degauss, one-time wiring completes all tests, auto calculate unbalance rate. -
![Dual-Channel Winding Resistance Tester]()
Dual-Channel Winding Resistance TesterProfessional dual-channel tester dedicated for transformer temperature rise test, high-voltage/low-voltage dual output, real-time sampling, fast charging and measurement. -
![Three Phase DC Resistance Tester]()
Three Phase DC Resistance Tester40A ultra-high current three-phase DC resistance tester, 50μΩ~20kΩ range, 7-inch touch screen, multi-protection, suitable for large transformer test. -
![Digital DC Winding Resistance Tester]()
Digital DC Winding Resistance Tester20A high precision digital tester with 0.5mΩ~25kΩ range, auto data stability analysis, 7-inch touch screen, complete safety protection, fast printing. -
![Portable Winding Resistance Meter]()
Portable Winding Resistance Meter10A portable winding resistance meter with dual power supply, 0.5mΩ~100kΩ range, 4.3-inch color screen, compact structure, discharge alarm protection. -
![20A Transformer DC Winding Resistance Tester]()
20A Transformer DC Winding Resistance Tester20A output transformer DC resistance tester with 200μΩ~20kΩ range, 5-inch high brightness screen, supports on-load tap changer test, temperature conversion. -
![3 Phase DC Winding Resistance Tester]()
3 Phase DC Winding Resistance Tester30A high current three-phase winding resistance tester, 200μΩ~20kΩ measuring range, 7-inch touch screen, Bluetooth APP control, 1000 groups data storage. -
![Portable Winding Resistance Test Kit]()
Portable Winding Resistance Test KitUltra-light 3.9kg portable test kit with 20A max current, 200μΩ~50kΩ measuring range, lithium battery powered, 7-inch touch screen, Excel data export supported. -
![High Current DC Winding Resistance Meter]()
High Current DC Winding Resistance MeterHeavy-duty 50A high current DC resistance meter for large transformers, measuring range 100μΩ~10Ω, high stability, strong anti-interference, built-in printer and U disk storage. -
![Portable Transformer DC Winding Resistance Tester]()
Portable Transformer DC Winding Resistance TesterAC/DC dual power supply portable winding resistance tester with 10A output, 0.5mΩ~100kΩ range, built-in battery, degauss function, auto calculate three-phase unbalance rate.
Why choose us
Our Certificate
We are certified in ISO 9001 (Quality), ISO 45001 (Health & Safety), and ISO 14001 (Environment), ensuring high standards in all aspects of our operations.
Strong R&D Capability
Committed to technological breakthroughs, including investments to develop 750kV reactor solutions.
Experienced Technical Team
A growing team of 61 employees supporting product development, production, and customer service.
Complete Pre & After-Sales Service
From solution design and technical support to installation, maintenance, and fast response service.
Transformer test equipment identifies insulation defects, winding faults, and core issues early, preventing unexpected failures. Standard tests include winding resistance measurement, turns ratio verification, insulation integrity checks, and partial discharge detection. Regular assessments allow utilities and manufacturers to maintain transformers within design specifications, extend operational life, and ensure safe electricity distribution.
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Specifications: |
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Active: |
Voltage measuring range: 0~10V |
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Current measuring range: 0~10A |
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Passive: |
Voltage measuring range: 0~800V |
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Current measuring range: 0~100A range switching fully automatically. |
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Precision: |
Voltage:±0.2% |
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Current:±0.5% |
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Power:±0.5%(CosΦ>0.2),±1.0%(0.02 |
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Working Temperature: |
-10ºC~ +40ºC |
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Charging source: |
AC 160V~260V |
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Insulation: |
Insulation resistance of voltage, current input terminal to the shell ≥100M. |
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The affordable power frequency between power source and shell: 2kV (effective value), takes 1 minute test. |
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Advantages of Transformer Test Equipment
Full Item Coverage: The complete set of equipment can complete comprehensive testing of electrical performance, insulation characteristics, and mechanical condition.
High-Precision Measurement: Adopts advanced sensing technology, achieving a key parameter measurement accuracy of 0.1 level, meeting standard requirements.
Intelligent Diagnosis: Built-in expert system automatically analyzes test data and generates diagnostic conclusions and maintenance suggestions.
Highly Efficient and Portable: Modular design allows for rapid deployment in the field, and a single unit can complete multiple tests.
Integrated Data: Test data is automatically archived, supporting historical comparison and trend analysis, enabling full lifecycle management.
Types of Transformer Test Equipment
Winding Resistance Testers
These testers measure the DC resistance of transformer windings to detect issues like shorted turns, poor connections, or other faults. Common models include micro-ohmmeters and winding resistance meters .
Insulation Resistance Testers (Megohmmeters)
These assess the insulation quality of transformer windings and the dielectric strength of insulating materials. They apply a high DC voltage and measure the resistance to ensure insulation integrity .
Transformer Turns Ratio (TTR) Testers
These measure the turns ratio between primary and secondary windings to verify the transformer's performance and detect winding damage or core issues. TTR testing is crucial for identifying problems such as shorted turns or incorrect winding connections .
Power Factor Testers
These evaluate the insulation condition by measuring the power factor or dissipation factor of the transformer windings and insulation system. This test helps in detecting insulation deterioration, moisture ingress, and other aging-related issues .
Sweep Frequency Response Analyzers (SFRA)
These analyze the transformer's frequency response to detect mechanical issues like winding deformation, core movement, or structural damage. SFRA tests are typically performed after transportation, seismic events, or suspected mechanical damage .
Dielectric Breakdown Voltage Testers
These test the dielectric strength of transformer oil or other insulating fluids by applying a high voltage until breakdown occurs. This test helps ensure the insulating fluid's ability to withstand electrical stress .
Application of Transformer Test Equipment
Comprehensive Factory Testing
Completes full-item testing during the manufacturing process, including turns ratio, DC resistance, no-load loss, load loss, and insulation characteristics.
On-site Acceptance Testing
After the installation of a new transformer, conducts acceptance tests on key indicators such as winding deformation, partial discharge, and withstand voltage.
Preventive Maintenance
Regularly conducts tests such as insulating oil chromatography, winding deformation, and dielectric loss to assess the equipment’s health status.
Fault Diagnosis and Analysis
When abnormalities occur, specialized tests such as frequency response method and short-circuit impedance method are used to locate the fault point and cause.
Routine Tests of Transformer Test Equipment
Ratio Test
Checks the turns ratio of the transformer windings to ensure it matches the specified design ratio.
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Polarity Test
Determines the correct connection of primary and secondary windings to ensure proper phase relationships.
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Resistance Test
Measures the DC resistance of transformer windings to ensure they meet design specifications.
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Impedance Test
Measures the impedance of the transformer to determine its ability to handle fault currents.
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Insulation Resistance Test
Measures the insulation resistance of transformer windings to ensure there are no faults or leakage paths.
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Special Tests of Transformer Test Equipment
Harmonic Analysis
Evaluates the transformer's response to harmonic distortion in the electrical system.
Noise Measurement
Determines the noise level generated by the transformer during operation.
Dynamic Stability Test
Assesses the ability of the transformer to withstand sudden changes in load or system conditions.
Frequency Response Analysis
Evaluates the frequency response characteristics of the transformer.
Commissioning Tests of Transformer Test Equipment
Vector Group Test
Verifies the correct connection of transformer windings and phase relationships.
Load Loss and Impedance Test:
Measures the actual losses and impedance of the transformer under operating conditions.
Factors to Consider When Selecting Transformer Testing Equipment
Application Requirements
Understand the specific needs of your application. For example, utilities may need portable equipment for on-site testing, while manufacturers may need precision lab-grade instruments.
Accuracy and Precision
Ensure the equipment delivers high-accuracy results. Precise measurements are crucial for assessing transformer performance.
Test Parameters
Choose equipment that can measure the key parameters required for your transformers, such as turns ratio, insulation resistance, and power factor.
Ease of Use
Select user-friendly equipment with clear interfaces, touchscreen controls, and simple instructions. Modern systems often come with pre-programmed test sequences, making the process faster and easier.
Connectivity and Data Management
Opt for equipment that allows easy data storage, transfer (USB, Ethernet), and compatibility with data management software. This simplifies record-keeping and analysis.
Safety Features
Look for equipment with built-in safety features like overload protection, insulation checks, and interlocks to ensure operator and equipment safety during testing.
Certificates
FAQ
As one of the most professional transformer test equipment manufacturers in China, we're featured by quality products and good price. Please rest assured to buy high quality transformer test equipment in stock here and get quotation from our factory. Customized orders are welcome.
