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Paper Phenolic Laminate sheets are made from layers of paper, impregnated with specifically formulated phenolic resins, bonded together under heat and pressure to produce a thermoset composite. Both paper and resins can be modified to change the finished properties of the final laminate.
Offers enhanced mechanical, electrical, electrostatic dissipative or fire performance.
The properties and cost-effectiveness of these products often make them insulators of choice in low/high-voltage, dry service electrical equipment.
| Grade | P-4 |
| Color | Natural Translucent or Opaque |
| Thickness Range | 0.8mm - 100mm |
| Characteristics | - Possesses exceptional electrical properties even under humid conditions, very low water - Absorption and excellent hot punching properties. - Specially made for high frequency applications. |
| Applications | - Cross bar switches - Meter Fuses - Band change - Switch insulation in X-ray equipments etc. |
| Properties | Unit | Grade | Paper Phenolic | Paper Phenolic | Paper Phenolic | Paper Phenolic | Paper Phenolic | Paper Phenolic | ||||||
| IS 2036:1995 | P1 | P2 | P3 | P4 | P3 | P4 | ||||||||
| NEMA LI 1-1983 | XP | XXP | XXXP | XXXXP | FR 1 | FR 2 | ||||||||
| IEL | IP 5001 | IP 5002 | IP 5003 | IP 5004 | IP - 222 | IP - 555 | ||||||||
| Mechanical Properties | Test Applicable for Thickkness | IEL AVG. VALUE | LIMITING VALUE | IEL AVG. VALUE | LIMITING VALUE | IEL AVG. VALUE | LIMITING VALUE | IEL AVG. VALUE | LIMITING VALUE | IEL AVG. VALUE | LIMITING VALUE | IEL AVG. VALUE | LIMITING VALUE | |
| Cross Breaking Strength | Mpa (min) | Not less than 1.6 mm | 140 | 130 ( min) | 140 | 130 ( min) | 100 | 85 ( min) | 100 | 70 ( min) | 100 | 85 ( min) | 90 | 70 ( min) |
| Tensile Strength | ||||||||||||||
| Shear Strength | Mpa (min) | Less than 1.6 mm | 85 | 75(min) | 80 | 70(min) | 65 | 60 (min) | 65 | 60 (min) | 65 | 60 (min) | 65 | 60 (min) |
| Electrical Properties | ||||||||||||||
| Electrical Strength (Flatwise) | MV/m | Not more than 3.00 mm | NA | Complies | Complies | Complies | Complies | Complies | Complies | Complies | Complies | Complies | Complies | |
| Electrical Strength (Edgewise) | KV | More than 3.00 mm | - | Complies | 20 (min) | Complies | 25 (min) | Complies | 30 (min) | Complies | 25 (min) | Complies | 30 (min) | |
| Insulation Resistance | M.ohms | Not more than 25 mm | 5 | 1 (min) | 15 | 10 (min) | 2500 | 1000 (min) | 35000 | 30000 (min) | 3000 | 1000 (min) | 40000 | 30000 (min) |
| Water Absorption (1.6 mm) | mg | (all thickness) | 300 | 478 (max) | 280 | 426 (max) | 50 | 76 (max) | 35 | 43 (max) | 50 | 76 (max) | 35 | 43 (max) |
| Specific Gravity | Grams/CC | 1.34 | 1.34 | 1.36 | 1.36 | 1.35 | 1.35 | 1.34 | 1.34 | 1.35 | 1.35 | 1.34 | 1.34 | |
| Flame Resistance | Class | UL-94 | N A | N A | N A | N A | N A | N A | N A | N A | V-1 | V-1 | V 0 | V-1 |
| Grade | P-2 |
| Color | Blackish Red |
| Thickness Range | 0.8mm - 100mm |
| Characteristics | - Delivers a combination of superior electrical and mechanical properties. - Ideal for general electrical applications in dry atmospheric conditions or in oil. |
| Applications | - Transformer covers - C.B. Handles & Side frames - Distribution boards - Fuse Holder base etc. |
| Grade | P-3 |
| Color | Natural Translucent or Opaque |
| Thickness Range | 0.8mm - 100mm |
| Characteristics | - Possesses very good electrical properties even under humid conditions and adequate mechanical properties like low water absorption, machining and hot punching. - Suitable for high tension electrical applications at power frequencies. |
| Applications | - Transformers and Choke Bobbins - Relay Spacers - HV Transformer - Tap Changers - Grid covers - Selector Band insulation etc. |
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