The preventive test regulations of the Ministry of Electric Power require regular turns ratio or voltage ratio tests on transformers, including semi-finished and finished products during production, before commissioning, and during operation in the power system. Traditional ratio bridges are cumbersome to operate, have non-intuitive readings, require necessary conversions, and test results only reflect the ratio of one phase. The automatic transformer turns ratio tester overcomes the shortcomings of traditional ratio bridge testing, completing three-phase ratio tests in one go, with fast test speed and high accuracy, greatly improving testing efficiency.
Main functions and features of the automatic transformer turns ratio tester
1. Wide test range, up to 10000.
2. Fast test speed, completing a single-phase test in 10 seconds.
3. 240*128 color LCD display, making the interactive interface more intuitive.
4. Testing of Z-connected transformers.
5. Features blind ratio testing and group testing.
6. Non-volatile clock and date display, data storage function (can store 50 sets of test data).
7. Protection function against reverse connection of high and low voltage.
8. Protection function against transformer short circuit and inter-turn short circuit.
9. Thermal printer output function, fast and quiet.
10. Uses both AC and DC power supply methods, usable with or without mains power on site.
11. Small size, light weight, easy to carry.
Main technical parameters
1. Range: 0.9 to 10000.
2. Accuracy: 0.1% ± 2 digits (below 500);
0.2% ± 2 digits (500 to 2000);
0.3% ± 2 digits (2000 to 4000);
0.5% ± 2 digits (above 4000).
3. Resolution: minimum 0.0001.
4. Output voltage: 160V, 10V automatic gear shifting.
5. Working power supply: AC power supply mode — requires external AC power supply AC220V ± 10%, 50HZ. DC power supply mode — no external power supply needed (the instrument has a built-in lithium battery pack, battery capacity 24V/6Ah).
6. Operating temperature: –20℃ to 40℃.
7. Relative humidity: ≤85%, no condensation.
