During the production process of semi-finished and finished power transformers, before newly installed transformers are put into operation, and in accordance with the preventive test regulations of the Ministry of Electric Power of the People's Republic of China, transformers are required to undergo turns ratio or voltage ratio tests. The traditional ratio bridge is cumbersome to operate, the readings are not intuitive, and necessary conversions are required. During testing, it can only be conducted on a single phase, resulting in low working efficiency. This series of instruments overcomes the shortcomings of traditional ratio bridge testing. The screen adopts a large-screen color LCD display with Chinese menu prompts, which is simple and intuitive to operate. It can complete the three-phase phase ratio test at one time, featuring fast testing speed, high accuracy and complete protection functions.

1.The interface adopts an intelligent color screen display mode, which is simple and convenient to operate. The circuit adopts a new generation of all-digital solution to ensure the long-term stability of the instrument.

2. The test speed is fast. The three-phase phase ratio test can be completed with just one wiring, taking only 10 seconds.

3. It has a blind test function, that is, it can conduct ratio and group tests when the high and low voltage connection methods are unknown.

4. It is suitable for testing the ratio, group and polarity of transformers ranging from distribution transformers to 1000KV transformers, single-phase transformers, current transformers (CT), voltage transformers (PT) and Z-type connection transformers.

5. The test range is wide, up to 10,000, and the maximum number of tap positions can be tested up to 197.

6. Non-volatile clock and date display; The data storage methods are divided into local storage and USB flash drive storage. Among them, local storage can store 500 test data items, and the local storage can be transferred to a USB flash drive. The data format stored on the USB flash drive is Word, which can be directly edited and printed on the computer.

7. The instrument is equipped with high and low voltage reverse connection protection functions, as well as transformer short circuit and inter-turn short circuit protection functions.

8. Small in size and light in weight, it is convenient to carry and use.

1.Measurement range: 0.9 to 10,000

2. Accuracy: + / - (reading) x 0.2% + 2 words (less than or equal to 500) x 0.5% (readings + 2 words) (greater than 500)

3. Resolution: 0.9-9.9999 (0.0001

4. Working power supply: Input 100-240VAC, 50/60Hz

5. Instrument weight: 3.5Kg

6. Instrument dimensions: 260mm(length)×200mm(width)×160mm(height)

7. Operating temperature: -10℃ to 50℃

8. Relative humidity: < 90%, no condensation