Triple insulated wire is electrical wire formed with 3 insulation layers verified as insulation material in safety standards around the circumference of the conductor. These wires are used in power transformers and realize miniaturization and cost reductions as no insulation tape or barrier tape is required between the primary and secondary windings of the transformers.
Development capabilities cultivated over many years as a pioneer of triple insulated wire, low cost and high reliability are highly regarded, and Round Teck Intl Co. has global top level market share.
Triple Insulated Wires (TIW) are widely used in pulse transformers in switched mode power supplies (SMPS)
The main advantage of the TIW wires is relatively high electric strength of the insulation, with breakdown voltage min. 6kV. Obtaining such a high resistance was possible by the use of a reinforced, three-layer conductor insulation. Third external insulation made of polyamide gives excellent flexibility and high mechanical resistance of the wire. Normally, TIW wires are produced in thermal class B i F. Fully automated manufacturing process provides a central position of conductor and the same thickness of insulation at any point of the wire.
Reinforced insulation causes the TIW wires meet the technical requirements of UL1950, IEC60950, BSEN60950 on creepage distance. Thus, it is unnecessary to use the margins of insulation in transformers, which ensure the required insulation distance. Using TIW wires can also reduce the number of insulation layers between windings and avoid the use of sleevings.
