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TRF No.:IECEN60950_1B
TRF originator: SGS Fimko
Measured min. creepage distance
Location
inside (mm)
outside (mm)
prim-sec
6.4
8.6
core-sec
3.2
4.3
prim-core
3.2
4.3
Measured min. clearances
prim-sec
6.4
8.6
core-sec
3.2
4.3
prim-core
3.2
4.3
Construction:
Concentric windings on EF25 size bobbin. 3 layers of insulation tape between primary (enamelled copper
wire) and secondary windings, 2 layers on outer winding. Winding ends additionally fixed with tape, outer
winding is primary. Teflon tube is provided on primary and secondary winding exit. Margin tape of 3.0 mm
provided on both sides of primary and secondary winding. 2 layers of insulation tape were wrapped on
outside of transformer.
wire) and secondary windings, 2 layers on outer winding. Winding ends additionally fixed with tape, outer
winding is primary. Teflon tube is provided on primary and secondary winding exit. Margin tape of 3.0 mm
provided on both sides of primary and secondary winding. 2 layers of insulation tape were wrapped on
outside of transformer.
Pin numbers
Prim.
1→2; 4→5
Sec.
8→10
Bobbin
Material
Chang Chun Plastics, Phenolic, type T373J,
T375J;
Sumitomo, Phenolic, Type PM-9820
T375J;
Sumitomo, Phenolic, Type PM-9820
Thickness
0.8 mm
Electric strength test
With AC 3000V after humidity treatment
Result
Pass
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