Dry-type Transformer

Dry transformer is widely used in local lighting, high-rise buildings, airports, wharf CNC machinery and equipment and other places, simply say dry transformer refers to the core and winding is not impregnated in the insulation oil transformer.

The cooling mode is divided into natural air cooling (AN) and forced air cooling (AF).In natural air cooling, the transformer can operate continuously for a long time at the rated capacity.When forced air cooling, the output capacity of the transformer can be increased by 50%.It is suitable for intermittent overload operation or emergency overload operation; due to the increasing load loss and impedance voltage, it should not be in long continuous overload operation.

Because the dry-type transformer has strong short-circuit resistance, small maintenance workload, high operation efficiency, small volume, low noise advantages, often used in fire prevention, explosion-proof and other places with high performance requirements.

1. Safety, fire prevention, pollution-free, and can run directly in the load center;

2. Adopt domestic advanced technology, high mechanical strength, strong short circuit resistance, small local discharge, good thermal stability, high reliability, long service life;

3. Low loss, low noise, obvious energy-saving effect, maintenance-free;

4. Good heat dissipation performance, strong overload capacity, forced air cooling can improve the capacity of operation;

5. Good moisture-proof performance, adapt to high humidity and other harsh environment operation;

6. Dry-type transformer can be equipped with perfect temperature detection and protection system.The intelligent signal temperature control system can automatically detect and circuit display the working temperature of the three-phase winding, can automatically start and stop the fan, and have alarm, trip and other function setting;

7. Small volume, light weight, less space, low installation cost.

The iron core adopts high-quality cold-rolled grain oriented silicon steel sheet, and the iron core silicon steel sheet adopts 45 degree full inclined joint, so that the magnetic flux passes through the joint direction of the silicon steel sheet joint.

Wrap form:

(1)twine;

(2)epoxy resin combined with quartz sand to fill and pour;

(3) glass fiber-reinforced epoxy resin pouring (i. e., thin insulating structure);

(4)multiple glass wire impregnated epoxy resin winding type (generally used in 3, because it can effectively prevent the cast resin cracking, improve the reliability of the equipment).

High-pressure winding generally adopts multi-layer cylinder type or multi-layer segmented type structure.