The QJ35 type transformer ratio resistor bridge produced by Shanghai Shuangte Electric Instrument Co., Ltd. is a high-precision, wide-range, and easy-to-operate bridge that can directly read the transformer's transformer ratio and transformer ratio error.
This manual describes the QJ35 transformer ratio resistance bridge, a resistive voltage‑divider bridge used to read transformer turns ratios and their errors with high accuracy. It includes the bridge’s purpose, technical data, operating principle, internal structure, usage steps, and safety/maintenance guidelines.
The document provides detailed instructions on setting up the bridge, adjusting the zero balance, measuring ratio errors, and performing regular calibration and cleaning to ensure reliable performance. This manual is written in Chinese.
| Operating temperature range | 0 °C – 40 °C |
|---|---|
| Maximum relative humidity | ≤ 80 % |
| Measurement range | 1.02 – 111.12 |
| Error measurement range | -2 % – +2 % |
| Amplifier power supply | 220 V 50 Hz |
| Measurement circuit voltage | 0 V – 600 V |
| Bridge resistor current | 5 mA |
The bridge can measure ratio changes from 1.02 to 111.12.
Connect the 220 V 50 Hz supply to the amplifier power input.
The test voltage must not exceed 7 V to prevent bridge overload.