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VARNISHED INSULATION CLASS B) B.S. 419/1966 |
Varnished Fiber Glass Cloth use as electrical INSULATION are made from fiber glass woven cloth and treated with varnishes of various types synthetic resin based, drying oils and other substances suitable for use at CLASS B (130oc) temperatures.
Fiber Glass Tapes Varnished CLASS B are available in straight cut & Bias-cut int 50 mts length & 0.13 mm to 0.25 mm thickness, width 10 mm to 90 mm subject to requirement.
Varnished glass cloth & Tape is used as slot insulation in AC/DC Induction Motors, as phase separator and layer insulation in transformer, Switchgear and electrical instruments and various other applications.
Characteristic Values
| Normal Thickness mm | Thickness Tolerance mm |
Proof Voltage Test One Minute 36 mm and 76 mm KY |
Minimum Tensile STR. kgf/cm width |
Minimum Tearing Strength gf |
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| MIN | Max | Warp | Weft | Warp | Weft | ||
| 0.13 | 0.11 | 0.14 | 3.5 | 8.9 | 5.4 | 80 | 60 |
| 0.15 | 0.13 | 0.17 | 4.25 | 8.9 | 5.4 | 80 | 60 |
| 0.18 | 0.16 | 0.19 | 5.00 | 8.9 | 5.4 | 120 | 90 |
| 0.25 | 0.23 | 0.28 | 6.50 | 11.5 | 8.0 | 120 | 90 |
