The document introduces the features and performance of the 339 combined transformer (American box-type transformer), including reliable power supply, compact structure, fast and flexible installation, convenient operation, small size, etc. This product is widely used in industrial areas, residential communities, commercial centers, urban roads, high-rise buildings, and other places. Compared with the European box-type transformer, the American box-type transformer adopts an integrated design and has a smaller size. It has a fully sealed and insulated structure without the need for insulation distance, ensuring personal safety. At the same time, the product has the advantages of low loss, low noise, low temperature rise, strong overload capacity, short-circuit resistance, and strong impact resistance.
The 10kV assembled type voltage transformer, also called an American box‑type transformer, offers reliable power supply, compact structure, fast installation, and small size. It integrates the transformer core, high‑voltage load switch, and protective fuse in a sealed oil tank, making it about one‑third the volume of a comparable European box transformer.
Technical data include ambient temperature limits of +40 ℃ to –30 ℃, altitude up to 1 000 m, wind speed up to 34 m/s (≤700 Pa), humidity not exceeding 95 % (daily and monthly averages), and shock resistance of 0.4 m/s² horizontal and 0.15 m/s² vertical acceleration. The transformer supports a 200 A load current, uses double‑fuse protection, and operates with high‑ignition‑point R‑TEMP oil (ignition point 312 ℃). External dimensions for standard and reinforced models are listed in the document. This manual is written in Chinese.
| Ambient temperature range | +40 ℃ to –30 ℃ |
|---|---|
| Maximum altitude | ≤1 000 m |
| Maximum wind speed | 34 m/s (≤700 Pa) |
| Shock resistance | Horizontal ≤0.4 m/s², Vertical ≤0.15 m/s² |
| Installation slope limit | ≤30° |
| Humidity limit | Daily ≤95 %, Monthly ≤95 % |
| Maximum load current | 200 A |
| Oil ignition point | 312 ℃ |
The transformer can operate from a high of +40 ℃ down to a low of –30 ℃.
Yes, the product is suitable for both ring‑net and terminal installations, allowing flexible conversion.
The transformer uses double‑fuse protection with a double‑sensitivity (temperature and current) plug fuse to reduce operating costs.