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Baoding Smail Electric Co., Ltd. was established on July 1, 2009 and is located in the National High-tech Industrial Development Zone of Baoding City, Hebei Province. It is a high-tech enterprise focusing on the research and development of power system automation, relay protection and instrumentation.

Handheld Turns Ratio Tester
In the production of semi-finished and finished power transformers, before newly installed transformers are put into operation, and in accordance with the preventive testing regulations of the

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Handheld Capacitance and Inductance Tester
With the development of China’s power industry, capacitor compensation devices have experienced unprecedented growth. However, this has also led to a significant increase in capacitor accident rates,

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Handheld Loop Resistance Tester
The SMRL10S handheld loop resistance tester is a high-precision, digital switch testing instrument meticulously developed by our company based on IEC standards and the latest power implementation

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Handheld DC Resistance Tester
Transformer DC resistance is a mandatory test item in transformer manufacturing, including semi-finished and finished product factory tests, installation, overhaul, tap changer modifications,

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Transformer Ratio Tester
In the production of semi-finished and finished power transformers, before newly installed transformers are put into operation, and according to the preventive testing regulations of the Ministry of

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Capacitance and Inductance Tester
With the rapid development of the power industry in our country, capacitor compensation devices have experienced unprecedented growth. However, this has also led to a significant increase in the

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Loop Resistance Tester
The loop resistance tester is a high-precision, digital switch testing instrument meticulously developed by our company based on IEC standards and the latest power implementation standard of the

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DC Resistance Tester
Transformer DC resistance testing is a mandatory procedure in multiple scenarios, including factory tests on semi-finished and finished products, installation, overhaul, tap changer modification,

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Transformer Short-circuit Impedance Tester
The low-voltage short-circuit impedance test is a direct method used to assess whether a transformer's windings have been deformed due to short-circuit current impacts during operation or mechanical

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On-load Tap Changer Tester
The on-load tap changer is the only moving part connected to the transformer circuit, therefore, its testing is receiving increasing attention. The Power Equipment Acceptance and Preventive Testing

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Transformer Winding Deformation Tester
The transformer winding deformation tester is used to test power transformers with voltage levels of 6kV and above, as well as other special-purpose transformers. During operation or transportation,

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Why Choose Us

One-stop service

The company has a 3,600 square meter production base, with advanced production equipment and technical teams as well as R&D teams. It can customize products according to customer needs and strictly implement quality management systems to ensure product quality and production efficiency.

Production Market

Our products have won long-term trust and praise from customers such as State Grid, China Southern Power Grid, China Guoneng, China Huadian, State Power Investment Corporation, China Datang, China Huaneng and other major energy companies.

Certifications

It currently owns more than 20 patents and 18 software copyrights, and has passed ISO 9001 quality management system, ISO 14001 environmental management system and ISO 45001 occupational health and safety management system certification.

Our Company Offers The Following Products

Main Features of Transformer Ratio Tester

High-precision measurement: Utilizing digital signal processing technology, the turns ratio measurement accuracy can reach 0.1%, effectively identifying minute differences in the number of turns.

Fast automatic testing: Three-phase turns ratio testing can be completed with a single connection, automatically calculating errors and determining the group, significantly improving efficiency.

Multi-mode compatibility: Supports turns ratio and group detection for single/three-phase, Z-shaped winding, and other special transformers, offering strong adaptability.

Safe and reliable: The test voltage is below 40V, equipped with overcurrent and overvoltage protection, ensuring safe and convenient operation.

Intelligent Management: Built-in large-capacity storage supports data export, historical comparison, and report generation, facilitating quality traceability and analysis.

Application of Transformer Ratio Tester

Preventative Testing in Power Systems: Regular inspections of operating transformers to assess their health status.

Transformer Manufacturing Process Inspection: Quality control before winding, assembly, and shipment.

Transformer Installation and Acceptance: Ensuring that the parameters of newly installed transformers are consistent with the design and meet commissioning standards.

Fault Diagnosis and Repair: Quickly locating internal faults in transformers such as inter-turn short circuits and winding deformation.

Power Engineering Companies and Power Construction Units: Used as a standard tool for the construction and commissioning of various substations and distribution rooms.

Advantages Of DC Resistance Tester

Increasing Equipment Maintenance Effectiveness: Quick sensor readings will minimize equipment downtime, thereby ensuring that the power grid and associated systems operate safely and reliably.

Decreasing Responsible Decisions for Operational Management: The ability to collect high-accuracy diagnostics associated with the condition of the equipment allows for an accurate evaluation of the maintenance needs to be determined. This reduces the risk of erroneous decisions during operations.

Enhanced Ease of Operation: Technical personnel will have the ability to fully utilize their time working with advanced intelligent technology and integrated information systems rather than being required to perform multiple manual procedures repetitively.

Guaranteed Return on Investment: Robust construction, durable design, and comprehensive after-sales service ensure the instrument's long-term, stable performance, delivering excellent value.

Application of DC Resistance Tester

Power Generation
Power plants utilize large generators to produce electricity. These power plants use the transformer DC resistance tester to check the transformers in the plants. They help users identify any resistance issues.

Power Distribution
Utility companies employ the testers to maintain and test the high voltage transformers in substations. They help the companies find any faults within the transformers.

Manufacturing
A wide range of factories depends on transformers to power their machines. The transformer DC resistance testers are used in these factories to regularly check the transformers. This makes sure that employees work in a safe environment.

Aerospace

The aerospace industry uses a few transformers with very high resistance. The transformer DC resistance testers help maintain these vital components and avoid failures during flights.

Transportation

Transportation systems, like railways and subways, use transformer DC resistance testers to check their electrical networks. The testers help prevent power disruptions on trains.

Renewable Energy

With the increase of renewable energy sources like wind and solar power, the transformer DC resistance testers are also used in these new power plants. They help maintain the transformers connected to the DC output from solar panels or wind turbines.

Packing Details

We will packing by professional export packing,safety against breakage, finally into the wooden cases/ carton/pallet or customized package.

productcate-948-390

Delivery Details

We can deliver by SEA,air,rail transportation,the China-Europe Railway Express etc.
TNT, DHL,UPS, FEDEX, EMS，S.F EXPRESS etc.

FAQ

Q: What should I do if the test leads are damaged?

A: It is recommended to use original parts. The wire diameter, length, and shielding performance of the test leads are specially designed. Using non-original leads may affect measurement accuracy and safety.

Q: What should I do if the instrument displays "Wiring Error" or "Over-range"?

A: "Wiring Error": Stop the test immediately and check if the high and low voltage sides are reversed, or if the test leads are short-circuited or open-circuited.
"Over-range": Check if the voltage range setting is appropriate, or if the turns ratio of the transformer under test exceeds the instrument's measurement range.

Q: What devices can a turns ratio tester typically test?

A: It is mainly used to test various types of power transformers, and can also be used to test voltage transformers (PTs), current transformers (CTs), and other electromagnetic components with turns ratio requirements.

Q: What key features should I consider when selecting a DC resistance tester?

A: Important features to consider include measurement range, accuracy, testing current, ease of use, data logging, and connectivity options.

Q: Why is measurement accuracy important in a DC resistance tester?

A: High measurement accuracy, such as ±0.5% or better, minimizes the risk of errors in resistance evaluation, which is vital for ensuring optimal equipment performance.

Q: How can I maintain the accuracy of my DC resistance tester over time?

A: Regular calibration of the device is crucial to maintain accuracy, along with ensuring secure and properly insulated connections during tests.

Q: What conditions should I consider while conducting tests with a DC resistance tester?

A: It is advisable to conduct tests in a controlled environment to minimize external factors, such as temperature and humidity, which can impact resistance readings.

We are one of the most professional instruments and meters manufacturers in China, also support customized service. Please rest assured to buy high quality instruments and meters at low price from our factory. If you have any enquiry about samples, please feel free to email us.

Handheld Loop Resistance Tester, instruments and meters, DC Resistance Tester