IS 7098 (Part 3) : 1993
Cables - Cross-Linked Polyethylene Insulated Thermoplastics Sheathed Cables Part 3 For Working Voltages from 66 kV Up to and Including 220 kV
summary
Cross-Linked Polyethylene (XLPE) insulated thermoplastics sheathed cables are high-voltage power cables used for transmission of electricity from 66 kV up to and including 220 kV. These cables offer excellent electrical insulation, thermal resistance, mechanical strength, and long service life, making them suitable for underground and industrial power transmission networks.
Why BIS Certificate is Mandatory for Cross-Linked Polyethylene Insulated Thermoplastics Sheathed Cables Part 3 For Working Voltages from 66 kV Up to and Including 220 kV
BIS certification is mandatory to ensure the safety, reliability, and performance of high-voltage XLPE cables used in critical power infrastructure. These cables operate at very high voltages, and any failure can cause serious accidents, power outages, or fire hazards. BIS standards ensure compliance with electrical, thermal, and mechanical requirements, protecting public safety and ensuring grid reliability in India.
What is BIS Certified for Cross-Linked Polyethylene Insulated Thermoplastics Sheathed Cables Part 3 For Working Voltages from 66 kV Up to and Including 220 kV
The BIS certified specification defines technical requirements for XLPE insulated, thermoplastics sheathed cables used from 66 kV to 220 kV. It covers conductor construction, insulation thickness, sheath material, electrical characteristics, routine and type tests, thermal performance, and safety parameters. Compliance ensures the cable meets Indian Standards for high-voltage power transmission applications.
Test required for Cross-Linked Polyethylene Insulated Thermoplastics Sheathed Cables Part 3 For Working Voltages from 66 kV Up to and Including 220 kV
Tests on Conductorr
| Title | Mandatory/Optional |
|---|---|
| Annealing test (for copper) | Required |
| Conductor resistance | Required |
| Purity test(for Cu) | Optional |
| Test for armouring material | Required |
| Materials | Optional |
| Construction of conductor | Required |
| Conductor Screening | Required |
| Insulation | Required |
| Insulation Screening | Required |
| Moisture Barrier | Required |
| Armouring | Required |
| Outer Sheath | Required |
Physical tests on insulation
| Title | Mandatory/Optional |
|---|---|
| Thickness & dimension of insulation | Required |
| Tensile strength and elongation at break | Required |
| Aging in air oven | Required |
| Hot Set test | Required |
| Shrinkage test | Required |
| Resistivity test for semi - conducting layers | Optional |
| Test for concentric metallic screen: | Optional |
| Thickness of metallic sheath | Required |
Physical tests on outer sheath
| Title | Mandatory/Optional |
|---|---|
| Thickness of sheath | Required |
| Tensile strength and elongation at break | Required |
| Aging in air oven | Required |
| Loss of mass in air oven | Required |
| Heat shock test | Required |
| Hot deformation test | Required |
| Shrinkage test | Required |
| Thermal stability test | Required |
| Carbon Black Content | Required |
| Tensile strength | Required |
| elongation at break before and after ageing | Required |
| Hot deformation | Required |
| Flammability test(for PVC outer sheathed cable only) | Required |
| Water Tightness test Longitudinal Radial | Optional |
| Thermal ageing on complete cable sample | Optional |
| Tensile strength and elongation at break for insulation and outer sheath | Optional |
| Resistivity test for semiconducting layers | Optional |
| Bending test followed by P D test | Required |
| Dielectric power factor & Measurement of capacitance at ambient temperature | Required |
| Dielectric power factor measurement at elevated temperature | Required |
| Load cycle test followed by P D measurement | Required |
| Impulse withstand test followed by HV test | Required |
| Partial Discharge Test | Required |
| High voltage test | Required |
| Optional | -- |
| Optional | -- |
Benefits of BIS Certification for Cross-Linked Polyethylene Insulated Thermoplastics Sheathed Cables Part 3 For Working Voltages from 66 kV Up to and Including 220 kV
1. High Electrical Safety
BIS certification ensures cables meet strict insulation and dielectric strength requirements, reducing risks of electrical failure and short circuits.
2. Reliable High-Voltage Performance
Certified cables are tested for thermal stability and voltage endurance, ensuring consistent performance under heavy load conditions.
3. Long Service Life
BIS standards ensure quality materials and construction, improving durability and reducing maintenance and replacement costs.
4. Legal and Regulatory Compliance
BIS certification is mandatory in India, allowing manufacturers and importers to supply cables for utilities, infrastructure projects, and power networks.
5. Trust and Market Acceptance
BIS-marked cables gain higher acceptance among power utilities, EPC contractors, and government projects, enhancing brand credibility and competitiveness.