TRIPLE INSULATED
WIRE (TIW)
Triple Insulated Wire (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. 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.
3rd EXTRUDED LAYER
2rd EXTRUDED LAYER
1st EXTRUDED LAYER
CONDUCTOR
All this leads to a significant reduction costs of the transformer, increase efficiency and miniaturization of the device. Depending on the
design, the use of wire TIW may reduce the overall dimension of the transformer to 40%, and weight up to 60% compared to the transformers
wound enameled wires.
BOBBIN
INTERLEAVED
INSULATION TAPE
MAGNET WIRE
BARRIER
TAPE
TIW-M
IN CASE OF NEED
Soldering process can be performed without a mechanical stripping of insulation. It only requires to maintain the appropriate temperature
and time of soldering.
DIAMETER
SOLDERING
TEMPERATURE
SOLDERING
TIME
0,20 - 0,35 mm
420±5ºC
3 seconds
0,40 - 0,45 mm
420±5ºC
4~5 seconds
0,50 - 0,65 mm
420±5ºC
5~6 seconds
0,70 - 1,00 mm
420±5ºC
6~7 seconds