R type transformer is a rookie of dry-type transformers products. Its core system using width varying quality oriented cold rolled silicon steel coils made of round
waist, and a circular section, can be wound without cutting. Thus, thereby producing a transformer noise, magnetic flux leakage small, no-load current is
small, low iron loss, high efficiency; and since the coil is cylindrical, short length of the copper per lap, so resistance is small, low copper loss low temperature,
overload small fluctuations, power better than toroidal transformer; in addition, the beginning of the secondary winding skeleton using fire-retardant PBT engineering
plastics winding respectively, whereby high dielectric strength, flame retardant.