Transformer Turns Ratio Bridge Tester Product Description
In the production process of semi-finished and finished power transformers, before new transformers are put into operation, and during the operation of transformers in the power system, according to the preventive test regulations of the Ministry of Electric Power, it is required to regularly test the turns ratio or voltage ratio of operating transformers. The traditional turns ratio bridge is cumbersome to operate, the readings are not intuitive, and necessary conversions are required. The test result only provides data for one phase's turns ratio.
Transformer Turns Ratio Bridge Tester Operating Method:
◇ This device is equipped with three buttons: "Select", "Confirm", and "Reset".
1. Resistance Measurement
After powering on or pressing the reset button, the instrument enters the initial state (1). At this time, the cursor pointer points to "Resistance". Press the "Confirm" button directly to enter state (2), displaying the changing charging current and measurement time. After charging is completed, it automatically enters state (3), displaying the resistance value, measurement current, and measurement time. Each time the "Confirm" button is pressed, one measurement result is stored (models with a printer will also print the measurement result). Press the "Reset" button to exit resistance measurement and enter state (4), displaying the discharge current. After discharge ends, it automatically returns to the initial state (1), completing one resistance measurement.
2. Number Setting
Entering the device number helps in searching data in the memory. In the initial state (1), point the cursor to "Settings" and press the "Confirm" button to enter state (5), displaying the current device number. Press the "Confirm" button again to enter state (6), prompting to input a new device number. At this time, pressing the "Select" button cycles the current input digit from '0' to '9', then from 'A' to 'Z'. After finding the desired number or letter, press the "Confirm" button to input that digit. Then input the next digit in the same way. After entering all six digits, it returns to state (5), displaying the newly entered device number. Press the "Reset" button to return to the initial state (1).
Performance Features
1. Wide test range, up to 10000.
2. Fast test speed, completes three-phase test in 7 seconds.
3. Testing of Z-connected transformers.
4. Has blind test turns ratio and group test functions.
5. Non-volatile clock and date display, data storage function.
6. Protection function for reverse connection of high and low voltage.
7. Protection function for transformer short circuit and inter-turn short circuit.
8. Thermal printer output function, fast and silent.
9. Small size, light weight.
Technical Specifications
1. Range: 0.9～10000
2. Accuracy: 0.1% ± 1 digit (below 500)
0.2% ± 1 digit (500~2000)
0.3% ± 1 digit (above 2000)
3. Resolution: minimum 0.0001
4. Output voltage: 160V, 10V automatic gear shifting
5. Power supply: AC220V 50HZ
6. Operating temperature: –20℃~ 40℃
7. Relative humidity: ≤85%, no condensation
