Product Introduction
In a power system, the transformer is the core equipment, and its long-term reliable operation is directly related to the stability and reliability of the entire system.
Currently, the DC resistance test and the turns ratio test are mandatory items for distribution transformer outage maintenance. To perform these tests, two separate instruments are traditionally required: a transformer dc resistance tester and a transformer turns ratio tester. Each instrument has its own dedicated test leads, requiring separate testing procedures and frequent changes in wiring configuration. This results in significant consumption of manpower, material resources, and testing time.
In response, our company has innovatively developed a two-in-one distribution transformer test system (DC resistance + turns ratio) powered by a high-capacity lithium battery. With just one set of equipment, both test items can be completed without the need for frequent disconnection of test leads. This integrated design greatly improves testing efficiency and simplifies on-site operations.
Transformer winding DC resistance testing
Transformer winding DC resistance testing
Supports high-precision measurement of transformer winding DC resistance, with a maximum test current of up to 20A and a measurement range covering 0.5mΩ to 50kΩ, meeting the on-site testing requirements of transformer winding resistance for transformers of different capacities and types.
Transformer turns ratio testing
Integrates high-precision transformer turns ratio measurement, with a ratio test range of 0.9 to 10000. Suitable for turns ratio testing after transformer factory production, installation, handover, and maintenance, helping to quickly determine whether the transformer ratio meets requirements.
Integrated DC resistance and turns ratio testing
Integrates winding DC resistance testing and transformer turns ratio testing into a single device, eliminating the need to frequently change instruments during on-site testing. This significantly reduces equipment carrying and test preparation time, improving overall work efficiency for on-site transformer testing.
Automatic three-phase winding testing and imbalance rate calculation
Supports multiple three-phase winding connection configurations such as Yn, Y, and △. It can automatically test three-phase windings and calculate the winding resistance imbalance rate based on test results, reducing manual operation and calculation work, and improving testing efficiency and data accuracy.
Multi-type transformer and PT/CT testing
Supports turns ratio testing for three-phase, single-phase, and Z-connected transformers. It can also be used for PT and CT ratio and polarity testing, covering the on-site testing requirements of various common power equipment and meeting the comprehensive testing needs of substations, power maintenance, and testing sites.
Parameter teknik
| Direct resistance test | |
| Arus keluaran | 20A、10A、5A、1A、0.1A、≤10mA |
| Rentang pengukuran | 20 A range 0.5mΩ～ 100mΩ 10 A range 1.0mΩ～ 300mΩ |
| 5 A range 10 mΩ～ 1.0 Ω 1 A range 200mΩ～ 6.0 Ω | |
| 0.1 A range 2.0 Ω～ 60 Ω ≤10mA range 30 Ω～ 50 kΩ | |
| Ketepatan | ±(Reading x 0.2% + 2 words) |
| Turn ratio test | |
| Rentang pengukuran | 0.9～10000 |
| Ketepatan | ±(reading x 0.1% + 2 words)(500 or less) |
| ±(reading x 0.2% + 2 words)(greater than 500 less than or equal to 3000) | |
| ±(Reading x 0.3% + 2 words)(> 3000) | |
| Resolusi | 0.9～9.9999(0.0001) 10～99.999(0.001) |
| 100～999.99(0.01) | |
| 10000 and above (1) | |
| Conditions of use and appearance | |
| Catu daya yang berfungsi | Built-in lithium battery, capacity 7.8AH |
| Tegangan pengisian | AC220V |
| Suhu layanan | -10℃～50℃ |
| Relative temperature | ≤90%, no condensation |
| Weight/size | 6.5kg/318×280×204mm |
Fitur Produk
1. One connection is sufficient to perform both the direct resistance and variable ratio tests.
2. The direct resistance test function allows for three-phase automatic testing of Yn, Y, and △ windings, along with the calculation of the three-phase unbalance rate. The maximum output current is 20A, which is ideal for testing the very low resistance of low-voltage coils in distribution network transformers.
3. The variable ratio test function supports three-phase, single-phase, and Z-type transformer testing, as well as PT/CT variable ratio and polarity testing. It also includes a blind test function.
4. Equipped with various wired and wireless communication interfaces, the instrument allows for easy expansion of its functions.
5. The transformer comprehensive tester supplier runs on an embedded Linux operating system, ensuring high security, smooth operation, and user-friendly functionality.
6. The transformer comprehensive tester factory utilizes a dual-core A7+M4 architecture, enabling real-time measurements and seamless performance.
7. The industrial-grade 7-inch display features a clean and simple design, offering a comfortable and user-friendly human-computer interaction experience.
8. This transformer comprehensive tester manufactures is powered by a large-capacity lithium battery with a built-in charger.
Application Scenarios
Substation on-site testing
Used for winding DC resistance, turns ratio, and related parameter testing of power transformers in substations. Suitable for equipment installation, handover acceptance, and routine maintenance work.
Transformer installation and commissioning
After new transformer installation is completed, test the transformer winding resistance and turns ratio to help confirm whether equipment wiring and main electrical parameters meet requirements.
Transformer maintenance and servicing
Suitable for testing after periodic maintenance, preventive testing, and fault repair of transformers. By testing parameters such as winding resistance and turns ratio, it assists in assessing equipment operating condition.
Transformer handover testing
Used for handover testing of newly installed or overhauled transformers. Performs on-site testing of key electrical parameters, providing test data for equipment commissioning.
Distribution transformer testing
Suitable for testing distribution transformers in factories, commercial buildings, industrial parks, and distribution rooms, facilitating rapid completion of multiple tests on site.
PT/CT on-site testing
Can be used for turns ratio and polarity testing of voltage transformers (PT) and current transformers (CT). Suitable for related testing work at substations and power testing sites.
Power testing and maintenance services
Suitable for power companies, transformer repair units, electrical testing organizations, and third-party testing institutions, used for comprehensive on-site testing of transformers and related electrical equipment.
FAQs:
Q1: What is the transformer comprehensive tester mainly used for testing?
A: The transformer comprehensive tester is mainly used for transformer winding DC resistance testing and transformer turns ratio testing. It also supports certain PT/CT ratio and polarity tests, and is suitable for transformer installation, maintenance, handover, and preventive testing.
Q2: Can the transformer comprehensive tester perform DC resistance and turns ratio testing simultaneously?
A: Yes. The transformer comprehensive tester integrates DC resistance testing and turns ratio testing functions into a single device. Related tests can be performed with a single wiring setup on site, reducing the need to change instruments and repeat wiring during testing.
Q3: What are the features of the transformer comprehensive tester compared with single-function testers?
A: The biggest feature of the device is multi-functional integration. A single device can complete tests such as transformer winding DC resistance and turns ratio, reducing the number of instruments carried on site and minimizing the time spent on repeated wiring and equipment changes.
Q4: Can the transformer comprehensive tester test transformers of different capacities?
A: Yes. The device features a wide DC resistance and turns ratio testing range. The appropriate test items and test current can be selected according to the type and winding parameters of different transformers, making it suitable for on-site testing of various power transformers and distribution transformers.
