Automatic Transformer Turns Ratio Tester
Darui Electric recommends:
The automatic transformer turns ratio tester is a new generation of intelligent turns ratio testing instrument that uses a microcontroller as the core for measurement calculation and automatic control. It features a full Chinese menu operation interface, with advantages such as intuitive display, good stability, high accuracy, wide measurement range, and no need for a three-phase power supply on site. According to the national standard GB1094-79: "The turns ratio of power transformers, except for transformers with voltage below 35KV and ratio less than 3, the allowable deviation is 0.5%."
Main Technical Indicators
2. Group: 1 to 12 points
3. Accuracy: 1 to 1000, class 0.2; 1000 to 10000, class 0.5
4. Power Supply: AC220V ±10%, 50Hz
5. Operating Ambient Temperature: -5°C to 40°C
6.
7. Volume: 430×320×215 mm3
8. Weight: 5kg
2. Has tap testing function, convenient to use.
3. High and low voltage isolation, can measure autotransformers.
4. Has the function of analyzing unknown groups and turns ratios.
5. Complete automatic protection system to avoid instrument damage.
6. Can automatically record data, data is not lost when power is off.
7. Automatically performs group transformation, can directly measure the turns ratio of all transformers;
8. Automatically switches phase sequence;
9. Automatically switches range;
10. Automatically calibrates the meter;
11. After inputting the standard turns ratio, it can automatically calculate the relative error;
For traditional turns ratio measurement methods, most use the QJ35 bridge, which has low measurement magnification, cumbersome operation, and accuracy is difficult to guarantee. It can no longer adapt to the fast-paced, high-efficiency requirements of modern measurement. The automatic transformer turns ratio tester has the advantages of small size, simple operation, light weight, convenient reading, good stability, high accuracy, wide measurement range, and high degree of automation in the measurement process. It can measure the turns ratio and connection group of various three-phase transformers, and can also measure the ratio and polarity of single-phase transformers and voltage transformers, and can display the turns ratio error. It also has an automatic printing function, making it an ideal choice for power departments.
According to IEC and relevant national regulations, the automatic transformer turns ratio tester must be used to test the turns ratio of semi-finished and finished products during transformer production, as well as transformers that are newly installed or repaired before being put into operation. In the preventive test regulations of the National Electric Power Department, it is required to regularly measure the turns ratio of operating transformers. Through the turns ratio test of transformers, it is possible to check the turns ratio of transformer windings, the condition of tap changers, determine whether there are defects such as inter-turn short circuits, and whether they can be operated in parallel, thereby ensuring the safe use of equipment.
Using a turns ratio bridge to measure the turns ratio of transformers is cumbersome and has a narrow measurement range, which is no longer suitable for the fast-paced, high-efficiency requirements of modern measurement. Therefore, using modern electronic technology, a new generation of automatic turns ratio and group tester has been developed. It uses a large-screen Chinese character display, menu operation, and a user-friendly interface. The turns ratio and group can be measured at once. This instrument is an ideal testing instrument for the power industry.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
