Your Professional Transformer Load and No Load Loss Tester 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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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.
A Transformer No Load Losses Test is a critical diagnostic procedure used to measure the energy losses that occur in a transformer when it is energized but not supplying any load. These losses, commonly referred to as iron losses or core losses, are primarily caused by hysteresis and eddy currents in the magnetic core. Accurate assessment of no-load losses helps in evaluating transformer efficiency, planning maintenance, and ensuring optimal operational performance.
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1. Input Specifications |
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Voltage measurement range |
0~750V wide range. |
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Current measurement range |
0~20~100A with automatic or manual range switching. |
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2. Accuracy |
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Voltage |
±0.1% |
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Current |
±0.1% of full scale |
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Power |
±0.1% (CosΦ > 0.1), ±0.2% (0.05 < CosΦ < 0.1) |
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3. Operating Temperature |
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Operating Temperature |
-10°C to +40°C |
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4. Power Supply |
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Operating Power Supply |
AC 160V to 265V |
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5. Insulation |
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(1) Insulation resistance between voltage/current inputs and chassis ≥100MΩ. (2) Withstands 2kV (RMS) power frequency voltage between input terminals and chassis for 1 minute. |
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6. Dimensions |
32cm × 24cm × 13cm |
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7. Weight |
3kg |
Advantages of Transformer No-Load Loss Tester
Safety
Reduces risks associated with high-voltage equipment, especially during field testing or in environments with limited safety infrastructure.
Accessibility
Requires less sophisticated instrumentation and can be performed with portable test sets, making it ideal for on-site diagnostics.
Simplicity
Easier to set up and interpret, requiring less technical expertise compared to full-scale high-voltage procedures.
Speed
Allows for quicker preliminary assessments of transformer health without full energization.
Types of Transformer No-Load Loss Tester
The operation of a single-phase transformer tester is straightforward, as it tests the transformer using only one phase. It measures both load and no-load losses from a single power supply. Being portable, such testers are ideal for quick field jobs. Their simplicity makes them suitable for small-scale transformers.
A three-phase transformer tester carries out tests on all three phases simultaneously. These testers are used to analyze complex, three-phase transformers more thoroughly to find losses. They give a complete picture of transformer efficiency by measuring no-load and load losses at the same time.
These testers combine several functions, talking about measuring no-load loss, load loss, and even more all in one. Smart testers are distinguished by digital readouts and data storage capabilities. This new device generation improves efficiency by enabling remote work, which is perfect for field applications.
The portable testers mentioned above are designed for field use and keep important testing functions within a compact device form. These testers measure load and no-load losses while being light and easy to carry. Their flexibility means that diagnosis can be made in real-time without moving the transformer from its location.
Transformers that perform testing automatically help eliminate human mistakes by automating the testing process. That said, these testers can measure no-load and load losses simultaneously while collecting data quickly and accurately.
Applications of Transformer No-Load Loss Tester
Power Generation and Distribution Companies
Testing transformers in power stations and substations with a load and no-load loss tester ensures that all transformers perform as expected. This practice helps utility businesses avoid power outages caused by inefficient transformers. These testers are often bought in large volumes by utility companies.
Transformer Manufacturing Facilities
Manufacturer use these testers to confirm that all transformers meet quality standards before sales. The tester results help companies identify poor or defective products so that they are not sold to customers. Large manufacturing facilities also require multiple testers to complete testing quickly.
Industrial Plants
Large manufacturing plants, petrochemical plants, and other industrial operations that require making an electrical investment use these testers. Industries make sure that transformers in their electrical systems are efficient and maintain long-term by testing them periodically.
Maintenance and repair Companies
Third-party maintenance companies that repair or service electrical systems in commercial buildings also use this tester. The testers help maintenance crews find inefficient transformers so they can replace or repair them before causing more damage. Repair businesses purchase these testers in bulk and store them to use as needed or in special offers.
Data centers
Large data centers with high power usage rely on these testers to maintain their transformers and avoid overload. Loss testers find inefficient transformers in data centers so replacement ones are installed before they cause downtime.
HVAC Company
There are many large heating, ventilation, and air conditioning systems in commercial buildings that incorporate electrical systems. HVAC businesses use transformer testers to ensure that all components work to improve system efficiency.
Safety Preparation
Ensure the transformer is de-energized, grounded, and isolated. Confirm that all personnel follow lockout/tagout (LOTO) procedures and use appropriate personal protective equipment (PPE).
Test Setup
Connect a precision wattmeter, voltmeter, and ammeter to the primary winding. Leave the secondary winding open. Use a variable AC source to apply rated voltage gradually.
Data Acquisition
Record voltage, current, power, and frequency at steady state. Multiple readings may be taken to ensure accuracy and account for instrument drift.
Loss Calculation
Compute no-load losses using measured values. Compare results with nameplate data or factory test reports to identify anomalies.
Reporting and Analysis
Generate a detailed report including test conditions, instrumentation used, observed values, and comparison with baseline data. Include recommendations for further investigation if losses exceed acceptable thresholds (typically ±10% of rated value).
Method of Testing of Transformer No-Load Loss Teste
Low-Voltage Excitation Method
A safe and commonly used approach where a reduced voltage is applied to the low-voltage (LV) winding while the high-voltage (HV) winding is open. This method minimizes risk and is ideal for field testing. While slightly less accurate due to scaling assumptions, modern instruments correct for non-linearities, making it highly effective for routine assessments.
High-Voltage Excitation Method
Involves applying full rated voltage to the HV winding. This provides the most accurate representation of actual operating conditions and is typically used in factory acceptance tests (FATs). However, it requires specialized high-voltage equipment and strict safety protocols, making it less practical for on-site use.
Residual Voltage Method
Used when only one winding is accessible. It measures induced voltage in the open winding to infer core losses indirectly. While convenient, this method is less precise and should be used only when standard methods are not feasible.
Bridge Methods (e.g., Schering Bridge)
Primarily used for measuring dielectric losses and capacitance but can support loss analysis in conjunction with other techniques. These are more specialized and typically part of comprehensive insulation diagnostics.
Certificates
FAQ
As one of the most professional transformer load and no load loss tester manufacturers in China, we're featured by quality products and good price. Please rest assured to buy high quality transformer load and no load loss tester in stock here and get quotation from our factory. Customized orders are welcome.
Transformer No Load Loss Tester, Intelligent Transformer Loss Parameter Tester, Transformer Core No Load Test Device
