Overhead Line Cover
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Overhead line covers for bare conductors. MVLC provides state-of-the-art insulation to help prevent electrical outages. It is designed to insulate existing bare lines without costly conductor replacement expenditures or additional line hardware. MVCC provides high quality electrical insulation and made from non-tracking silicone material suitable for harsh medium voltage outdoor environments. MVCC is suitable for applications up to 25 kV phase to ground. Covers protect energized conductors from flashovers due to contact from birds and animals.
- MVLC Available in 3 different sizes
- Prevents electrical outages on distribution lines caused by trees or wildlife
- Installation tool allows application on energized lines
- Non-mastic version available for applications up to 15 kV
- Mastic sealed version available for 36 kV applications
- MVCC Available in 4 different sizes
- Electrical insulation for substation leads and jumpers
- Non-tracking silicone material suitable for harsh MV outdoor environments
- MVCC covers are split for easy installations
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Specifications
Power Line Protector
| Product Reference | Voltage (kV) | Roll Length (in meter) |
|---|---|---|
| POLIPRO | 1.1 | 20 |
Medium Voltage Line Cover
| Product Reference | Voltage (kV) | Roll Length (in meter) |
|---|---|---|
| MVLC-14-A/241 (COATED) | 33 | 100 |
| MVLC-18-A/U | 11 | 75 |
| MVLC-18-A/241 (COATED) | 33 | 50 |
| MVLC-38-A/241 (COATED) | 33 | 165 |
Medium Voltage Conductor Cover :
| Selection | |||
|---|---|---|---|
| Description | Use Range UOM: mm (Inches) | Color | Supplied Length UOM: M (Feet) |
| MVCC-10/.40 (S30) | Up to 11 (0.45) | Red | 2 pieces at 15 (50) |
| MVCC-G-10/.40 (S30) | Up to 11 (0.45) | Grey | 2 pieces at 15 (50) |
| MVCC-19/.75 (S15) | 11 (0.45) – 19 (0.75) | Red | 2 pieces at 7.5 (25) |
| MVCC-G-19/.75 (S15) | 11 (0.45) – 19 (0.75) | Grey | 2 pieces at 7.5 (25) |
| MVCC-25/1.0 (S7) | 19 (0.75) – 28 (1.125) | Red | 1 piece at 7.0 (25) |
| MVCC-G-25/1.0 (S7) | 19 (0.75) – 28 (1.125) | Grey | 1 piece at 7.0 (25) |
| MVCC-45/1.75 x 4 (S7) | 28 (1.125) – 44 (1.75) | Red | 6 pieces at 1.2 (4) |
| MVCC-G-45/1.75 x 4 (S7) | 28 (1.125) – 44 (1.75) | Grey | 6 pieces at 1.2 (4) |
Technical Information
| Power Line Protector (POLIPRO) | |||
|---|---|---|---|
| Properties | Performance Parameter | Test Method | Requirements |
| Electrical |
AC Withstand (Dry)-One Minute AC Withstand (Wet)-One Minute Di-electric strength Volume Resistivity @27°C |
ASTM D149 ASTM D257 |
3 KV min 3 kV min 10 kV/mm min 10¹²ohm-cm min |
| Physical |
Tensile Strength Ultimate Elongation Low Temperature Impact Abrasion Resistance |
ASTM D638 ASTM D638 ASTM D746 1000 Cycles, 2068 gms |
10 N/sq.mm min 200% min No Cracking at-20°C 20% max Thickness loss. |
| Thermal |
Accelerated Ageing@168hrs at (150±2) °C -Tensile Strength -Ultimate Elongation |
ASTM D2671 |
8.5 N/sq.mm min 100% min |
| Chemical |
Water Absorption 336 hrs@ (23+2) °C Resistance to Bird Excrement -Tensile Strength -Ultimate Elongation Resistance to Cable Grease -Tensile Strength -Ultimate Elongation |
ASTM D570 Uric Acid for 168hrs@60 C 168 brs@60 °C |
1% max 8.5 N/sq.mm min 100% min 8.5 N/sq.mm min 100% min |
| Crosslinking |
Hot Elongation 200°C permanent Set @ 200°C |
IS:10810 IS:10810 |
170 % ± 20 % 15 % ± 20 % |
| Medium Voltage Line Cover | |
|---|---|
| Product Performance | |
| Test | MVLC-A/U / MVLC-A/241 (sealed) |
|
AC withstand (dry) - 1 minute (wet) - 1 minute |
15 kV min. / 25 kV min. AC withstand 15 kV min. / 25 kV min. |
|
AC long term withstand (dry) - 4 hours loading (8 hr @ 130 °C; 16 hr off) |
8.6 kV min. / 14.4 kV min. 30 day thermal No MVLC deformation |
|
Conductor ampacity |
82-89% of bare conductor ampacity |
| Material properties per pps 3010/42 | Test method | Requirement | |
|---|---|---|---|
| Physical |
Tensile Strength Elongation |
ASTM D638 ASTM D638 |
8 MPa min. Ultimate 200% min. |
|
Abrasion Resistance Impact |
1000 cycles, 2068g ASTM D746 |
20% max.thickness loss Low Temperature No cracking at -20 °C |
|
| Electrical |
Dielectric Strength |
ASTM D149 |
217 kV/cm @ 1.27 mm |
|
Tracking and Erosion Step Voltage Method |
ASTM D2303 (Initiate @ 2.5 kV) |
No tracking or erosion Resistance to top surface or flame failure after: 200 minutes |
|
|
Medium Voltage Conductor Cover : |
||
|---|---|---|
|
PRODUCT PERFORMANCE |
||
|
Test |
||
|
AC Dry Withstand/1 min. |
35 kV Line Voltage (all three phase covered) 25 kV Line Voltage (all three phases covered) 25 kV phase-to-ground 15 kV phase-to-ground |
|
|
Loading Cycleing 30 days at 130°C |
No Deformation or Splitting |
|
|
Low Temperature Install at 0°C |
Installable without Difficulty |
|
|
Physical |
||
|
Key Material Properties |
Test Method |
Results |
|
Accelerated Aging 168 hrs. 150°C Tensile Strength |
ASTM D412 |
> 1.3 MPa (psi) |
|
Accelerated Aging 168 hrs. 150°C Ultimate Elongation |
ASTM D412 |
90% min. |
|
Low Temperature Flexibility 4 hrs.- 20°C |
ASTM D2671 |
No Cracking |
|
Electrical |
||
|
Dielectric Strength 1.91 mm thickness |
ASTM D149 |
> 120 kV/cm (300 V/mil) |
|
Tracking and Erosion Resistance |
ASTM D2303 |
No tracking or erosion to top surface or flame failure after: 1 hr. at 2.5 kV 1 hr. at 2.75 kV 1 hr. at 3.0 kV 20 min at 3.25 kV |
|
Volume Resistivity |
ASTM D257 |
1 x 10₁₃ Ohm cm min. |
Certifications
CPRI
More info available on request
ERDA
More info available on request