Triple Insulated wire is also called triple insulated wire. It is a high-performance insulated wire newly developed internationally in recent years. This wire has three insulating layers, with the core wire in the middle. The first layer is a golden polyamide film, which is called "golden film" abroad. It is several microns thick, but can withstand 1kV pulse high voltage; the second layer is a high-insulation spray coating; the third layer (outermost layer) is a transparent glass fiber layer. The total thickness of the insulation layer is only 20 to 100. Triple insulated wire is suitable for cutting-edge technology and defense fields, and is used to make micro motor windings and high-frequency transformer windings for miniaturized switching power supplies. Its advantages are high insulation strength (any two layers can withstand a safe voltage of 3000V AC), no barrier layer is required to ensure a safe margin, and no insulating tape layer is required between stages; the current density is large. T