Overhead Line Cover

Category: Raychem RPG Tag: Overhead Line Cover

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)
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 %

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 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

Crosslinking

Hot Elongation 200°C

permanent Set @ 200°C

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

Material properties per pps 3010/42

Test method

Requirement

Physical

Tensile Strength

Elongation

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.

Description
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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.