Insulation enhancement system
M971
(Overhead Line Cover, Overhead Line Insulation Sleeve)
Applications:
Medium voltage line cover MVLC provides state-of-the-art insulation to help prevent electrical outages caused by trees or wildlife coming into contact with distribution lines. MVLC is designed to insulate existing bare lines without costly conductor replacement expenditures or additional line hardware. To provide insulation and protecting for overhead line core cables, prevent short circuit accidents caused by incidental contact of tree branches or wildlife. Also used for railway contact network overhead line system, improve insulation performance to ensure the safe operation of railway line.
insulation for catenary, droppers and associated conductors against contact with trees, birds, wildlife or even vandalism. Simple, fast wraparound installation.
Features:
Anti-tracking
Weather resistance
Superior UV and abrasion resistance
Localized installation
Range taking
Easy installation
Lightweight
Live installation
Continuous Temperature Limit: -45℃ to 105℃
Standard color: red (black, green and yellow are available on request)
Technical properties:
M971 Tech data | ||
Property | Testing method | Typical data |
Tensile strength | ASTM D 2671 | 10Mpa min |
Elongation | ASTM D2671 | 400% min |
Dielectric strength(for 10kV) | IEC 243 | ≥25kV/mm |
Dielectric strength(for 35kV) | IEC 243 | ≥42kV/mm |
Dielectric constant | IEC 250 | 5.0 max |
Volume resistance | IEC 93 | 1.0X1013Ω.cm min |
Adhesive to steel | DIN 30672 | 0.5N/cm |
Water absorption | ISO 62/23℃,14Days | 0.5% max |
Flammablity(Oi) | ISO 4589 | 27 min |
Low temperature flexibility(-40℃,4hr) | ASTM D 2671 | No crack |
Dimensions:
M971 dimensions | ||||
Code | Size(mm) | Suitable conductor section | Max.conductor diameter | Standard packing |
M971 | 13 | < 100 mm2 | 13mm | 20m/reel;40m/carton |
M971 | 18 | <185mm2 | 18mm | 20m/reel;40m/carton |
M971 | 23 | <300mm2 | 23mm | 20m/reel;40m/carton |
M971 | 38 | <800mm2 | 38mm | 20m/reel;40m/carton |
* Products with adhensive are suitable for application up to 40kV.
Products without adhensive are suitable for application up to 25kV.
Other sizes and packing are available on request.
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