Dry type power transformer definition:
◆Simply put, dry-type transformer refers to a power transformer in which the core and coils are not immersed in insulating liquid (insulating oil).
◆Mainly composed of an iron core composed of silicon steel sheets and a coil cast by epoxy resin. An insulating cylinder is placed between the high and low voltage coils to increase electrical insulation, and the coil is supported and restrained by pads. The epoxy cast dry-type transformer is used in power distribution systems. Important electrical equipment. Because epoxy resin is a flame-retardant, flame-retardant, self-extinguishing solid insulating material, it is both safe and clean. Therefore, epoxy resin cast dry-type transformers are widely used because they are oil-free, flame-retardant, have low operating losses, and have outstanding disaster prevention capabilities. relative to oil
Type transformers and dry-type transformers have no oil, so there are no problems such as fire, explosion, pollution, etc., and the loss and noise are reduced to a new level, which creates conditions for the transformer and the low-voltage panel to be placed in the same power distribution room.
Transformer structure and working principle
●Winding:
●The winding is the circuit part of the transformer
●Copper or aluminum wires are wrapped with insulating paper and then wound.
●The circuit part of the transformer is made of copper wire or aluminum wire, and the primary and secondary windings are concentrically placed on the iron core column.
In order to facilitate insulation, the low-voltage winding is usually inside and the high-voltage winding is outside. However, for large-capacity low-voltage and high-current transformers, considering the difficulty in lead wire technology, the low-voltage winding is often placed outside the high-voltage winding.
