Product Introduction
The CT PT polarity Tester is a fully automatic industrial testing equipment, belonging to the specialized instrument for transformer detection, widely used in the fields of power system, chemical industry, energy, etc. This device integrates core functions such as volt ampere characteristic testing, ratio polarity testing, error curve calculation, and AC withstand voltage testing. It supports digital setting of the maximum output test voltage, maximum output current, and step size, achieving automatic and gradual voltage rise from zero.
제품 특징
1. Support CT and PT detection
2. Comply with the requirements of GB 20840.3-2013, GB 20840.2-2014 and other regulations
3. All testing projects can be completed by one machine without external auxiliary equipment
4. Having your own mini fast printer, you can directly print test results on site
5. Adopting intelligent controller, easy to operate
6. Large screen LCD display, graphical display interface
7. CT/PT (excitation) inflection point value is automatically given according to the program
8. Automatically provide error curves of 5% and 10%
9. Can save 3000 sets of test data, will not be lost after power failure
10. Supports saving data on a USB flash drive, which can be read through a standard PC and generate WORD reports
11. Compact structure, light weight ≤ 22kg, very suitable for on-site testing
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기술적인 매개변수
The main parameters
| Item | 매개변수 | |
| 작동 전원 공급 장치 | AC220V±10% 、50Hz | |
| Device output | 0 ~ 2500V (Current Max set 20A) | |
| 고전류 출력 | 0～1000A | |
| 여기 측정 정확도 | ≤0.5%(0.3%* reading +0.2%* range) | |
| CT 비율 측정 | The scope of | ≤5000A/1A(25000A/5A) |
| 정도 | ≤0.5% | |
| PT ratio 측정 | The scope of | 5~220kV |
| 정도 | ≤0.5% | |
| work environment | 온도 | －10℃ ～ 40℃ |
| 습기 | ≤90% | |
| 고도 | ≤1000m | |
| 크기 | 410mm × 260mm × 340mm | |
| 무게 | ≤25kg | |
Advantage
Efficient and convenient: One instrument replaces multiple devices, reducing wiring and operation steps, greatly shortening testing time.
Comprehensive diagnosis: One wiring can complete multiple tests, comprehensively evaluate the performance of the transformer, and detect potential problems early.
Accurate and reliable: The microprocessor integrated inside the instrument ensures the stability and accuracy of the measurement results, avoiding human errors.
Data management: Most instruments have data storage and export functions, which facilitate the generation of test reports and data analysis.
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Typical application scenarios
1. Current and voltage transformer manufacturing enterprises shall conduct a complete set of volt ampere characteristic and error characteristic quality final inspections on each finished product before leaving the factory;
2. Substation maintenance centers of power supply companies at all levels shall conduct handover acceptance characteristic retesting on newly installed or overhauled transformers;
3. Substation, carry out annual preventive maintenance plan for transformers in operation to track and detect excitation characteristics and transformation ratio errors;
4. Electric Power Science Research Institute and university laboratories are used for studying the magnetic saturation characteristics of transformers, analyzing error mechanisms, and verifying the performance of new models;
5. Third party power testing service providers undertake transformer performance evaluation and fault diagnosis projects commissioned by power generation, distribution, and industrial users;
6. Electric power installation (repair, testing) qualification enterprises, as an important component of laboratory capacity configuration and on-site operation team inspection toolbox.
Frequently Asked Questions
Q: What parameters can the CT PT polarity tester measure?
A: It can measure key parameters of transformers, including turns ratio, angular error, excitation characteristics, secondary circuit resistance, and insulation resistance.
Q: What exactly do "turns ratio" and "polarity" mean on a CT PT turns ratio polarity tester?
A: "Turns ratio" refers to the ratio of primary-side voltage (or current) to secondary-side voltage (or current) in a transformer. "Polarity" indicates whether the polarity marks on the primary and secondary sides are in the same direction or opposite directions.
Q: Why is it necessary to set the transformer's rated turns ratio before testing?
A: Setting the rated turns ratio allows the tester to calculate the deviation between the measured value and the rated value, thereby determining whether the transformer meets specifications.
Q: Are there any special requirements for wiring on the primary and secondary sides during testing?
A: The wiring must be secure, and the terminals with the same polarity marks must be connected correctly, following both the tester's instructions and the markings on the transformer nameplate.
Q: Is it normal if the measured turns ratio deviates from the nameplate value?
A: A certain tolerance range is permissible, subject to relevant national regulations or industry standards. If the deviation is excessively large, further inspection is required.
Q: Are there any additional precautions when using the CT PT turns ratio polarity tester from Wuhan UHV Power Technology Co., Ltd.?
A: It is recommended to read the product manual thoroughly before use and follow the technical support guidance provided by the manufacturer to ensure testing accuracy and safety.
