Transformer Turns Ratio Bridge Tester Product Description
During 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. At this point, each press of the "Confirm" button stores one measurement result (models with a printer simultaneously 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 equipment number helps in searching data in the memory. In the initial state (1), move the cursor pointer to "Settings" and press the "Confirm" button to enter state (5), displaying the current equipment number. Press the "Confirm" button again to enter state (6), prompting to input a new equipment 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 six digits, it returns to state (5), displaying the newly entered equipment 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. Test for Z-connected transformers.
4. Has blind test for turns ratio and group test functions.
5. Non-volatile clock and date display, data storage function.
6. Protection function for high and low voltage reverse connection.
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
