The R-type transformer is named R-type transformer because the cross-section of the iron core resembles the letter R. It is a type of dry-type transformer. It is a kind of dry-type transformer. The core is made of wide and narrow high-quality oriented cold-rolled silicon steel strip rolled into a waist round, and the cross-section is round, without cutting can be wound. The resulting transformer no noise, small magnetic leakage, small no-load current, low iron loss, high efficiency; and because the coil is cylindrical, the length of each turn of the copper wire is short, so the internal resistance is small, low copper consumption, low temperature rise, overload fluctuation is small, its high efficiency, light weight, small size,
than the toroidal transformer is good; in addition, the primary and secondary coils are made of flame retardant PBT engineering plastics skeleton are respectively wound, thus high electrical strength, flame retardant and high efficiency, the transformer is a kind of dry type transformer. Thus, the anti-electrical strength is high and the flame retardancy is good.