Dry-type transformer manufacturersDry-type transformer has the advantages of strong anti-short circuit ability, small maintenance workload, high operating efficiency, small size and low noise, and is often used in places with high performance requirements such as fire and explosion prevention.

    1.the advantages of dry type transformer:

1. Safe, fireproof, no pollution, can be directly operated in the load center; 2. Adopting domestic advanced technology, high mechanical strength, strong short circuit resistance, small partial discharge, good thermal stability, high reliability, and long service life; 3. Low loss, low noise, obvious energy saving effect, maintenance-free; 4. Good heat dissipation performance, strong overload capacity, and increased capacity operation when forced air cooling; 5. Good moisture-proof performance, suitable for operation in harsh environments such as high humidity; 6.Dry-type transformer manufacturers said,Dry-type transformers can be equipped with a complete temperature detection and protection system. The intelligent signal temperature control system can automatically detect and display the working temperature of the three-phase windings, automatically start and stop the fan, and have functions such as alarm and trip; 7. Small size and weight Light, less space and low installation cost.

　　2.in the form of dry type transformer:

Open type: is a commonly used form, its body is in direct contact with the atmosphere, suitable for relatively dry and clean rooms (when the ambient temperature is 20 degrees, the relative humidity should not exceed 85%). Generally, there are two cooling methods: air self-cooling and air cooling.

Closed: The device is located in a closed shell and does not directly contact the atmosphere (due to poor sealing and heat dissipation conditions, it is mainly used in mines and belongs to explosion-proof type).

Pouring type:Dry-type transformer manufacturers said,Using epoxy resin or other resin as the main insulation, simple structure, small size, suitable for small capacity transformer.

　　3.dry type transformer working environment:

1.0 - 40( ℃ ), relative humidity <70%;2. Altitude: no more than 2500 meters; 3. Avoid rain, humidity, high temperature, high heat or direct sunlight. The distance between the heat sink and the surrounding objects should not be less than 40cm; 4. Prevent work in places with more corrosive liquids, gases, dust, conductive fibers or metal debris; 5. Prevent work in places with vibration or electromagnetic interference; 6. Avoid long-term inverted storage and transportation to protect from strong impact.

4. the structural performance of dry-type transformer:

(1) solid insulation package winding.

　　(2)Winding is not encapsulated. Winding: In the two windings, the higher voltage is the high voltage winding, and the lower voltage is the low voltage winding. From the relative position of high and low voltage windings, high voltage can be divided into concentric and overlapping. Concentric windings are simple and easy to manufacture, using this structure. Overlapping type, mainly used for special transformers.

Dry-type transformers shall meet the following requirements:A) when the transformer is installed in parallel with the low-voltage power distribution cabinet, the protection grade of its shell shall not be lower than IP3X, and when installed separately, it shall not be lower than IP2X; B) there is no spark discharge trace on the surface of iron core and casing; C) no damage or crack on the outside of casing and insulator; D) the casting body of transformer winding is free of cracks and dirt; E) there is no serious dirt on the surface of iron core and casing.