The QZB-J series starting auto-transformer is suitable for AC 50Hz~60Hz, rated voltage 380V (660V or 220V products can be customized), rated output power 500kW and below three-phase squirrel-cage induction motor for non-frequent operation conditions under the reduced voltage starting, using the transformer The characteristics of voltage reduction reduce the starting current of the motor to improve the impact of the motor starting on the power network.
This manual provides the technical data, dimensions, and installation requirements for the QZB‑J series auto‑down press transformer used with three‑phase induction motors up to 500 kW. It describes the operating principles, temperature protection features, and the differences between the QZB‑J and the earlier QZB series.
The document includes tables of rated power, current, and starting percentages for both 380 V and 660 V systems, as well as detailed mechanical dimensions for each model. Installation guidelines cover ambient temperature limits, humidity, altitude, and mounting angle requirements. This manual is written in Chinese.
| Rated voltage (380 V system) | 380 V |
|---|---|
| Rated voltage (660 V system) | 660 V |
| Maximum altitude | 2000 m |
Installation is limited to altitudes not exceeding 2000 m.