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VARNISHED FOR INSULATION CLASS "F" B.S. 419/1966 |
Fiber Glass woven cloth made from continuous filament fibre yarn E-Type with alkali free yarn and treated with varnishes of various type mainly polyurethane and isopthalate base suitable for CLASS F (155oC) temperatures.
Characteristic Value
| Normal Thickness mm | Tolerance on Thickness mm | Electric Strength Proof Volt.Test One Minute KV |
Minimum Tensile strength kgf/cm width |
Minimum Tearing strength gf. |
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| MIN | MAX | WARP | WEFT | WARP | WEFT | ||
| 0.13 | 0.11 | 0.14 | 3.00 | 8.0 | 5.4 | 80 | 60 |
| 0.15 | 0.13 | 0.17 | 3.75 | 8.9 | 5.4 | 80 | 60 |
| 0.18 | 0.16 | 0.19 | 4.50 | 8.9 | 5.4 | 120 | 90 |
| 0.25 | 0.23 | 0.28 | 5.50 | 11.5 | 8.0 | 120 | 90 |
Due to high heat resistance Tapes & Cloth used in field coil, slot & layer insulation in motors, generators, transformers and other electrical & heat equipments.
