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The core of the dry-type power transformer adopts high-permeability high-quality grain-oriented cold-rolled silicon steel sheet 45 ° full oblique step seam. The core adopts a special square tube pull plate structure. The core post is bound by insulating tape. Special resin coating to prevent moisture and rust, effectively reducing no-load loss, no-load current and core noise.

Performance introduction
The core of the dry-type power transformer adopts high-permeability high-quality grain-oriented cold-rolled silicon steel sheet 45 ° full oblique step seam. The core adopts a special square tube pull plate structure. The core post is bound by insulating tape. Special resin coating to prevent moisture and rust, effectively reducing no-load loss, no-load current and core noise.
Dry-type power transformer is a kind of dry-type transformer with high electric strength, high mechanical strength. It is an excellent product for urban power grid transformation, especially suitable for high-rise buildings, airports, power stations, commercial centers and other important places that require fire protection, explosion protection, and moisture resistance.

1. High insulation strength
Pouring epoxy resin has an insulation breakdown field strength of 18-22KV / mm, and an oil-immersed transformer with the same voltage level has approximately the same lightning impulse strength. The insulation temperature level is F level, and the maximum allowable temperature is 155 ° C. The winding temperature The rise limit is 100K.

2. Strong short-circuit resistance
Due to the material characteristics of the resin, the winding is cast as a whole, and it becomes a rigid body after being heated and fixed. Therefore, the mechanical strength is very high, and it is proved by the short circuit test that the resin cast dry-type transformer is rarely damaged due to short circuit.
3. Outstanding disaster prevention performance
Epoxy resin is flame retardant, flame retardant and self-extinguishing, and will not cause secondary disasters such as explosion.

4. Superior environmental performance
Epoxy resin is a chemically and stable material that is moisture-proof and dust-proof. It can operate reliably even in harsh environments such as atmospheric pollution. Can be put into operation again.

5. Maintenance-free
Due to the perfect temperature control and temperature display system, the epoxy resin cast dry-type transformer can be maintenance-free at present, which can greatly reduce the burden on operating personnel and reduce operating costs.

6. Low operating loss and high operating efficiency

7. Low noise

8. Small size, light weight, convenient installation and commissioning

9. No separate transformer room is needed, no hanging core inspection is needed, saving floor space.

10. Strong overload capacity
When the ambient temperature is 20 ° C, it can be overloaded for 1.16 times in a long time and 1.5 times in 60 minutes. If the fan is put in and the transformer is operated under forced air cooling (AF), it can be overloaded for 1.5 times.