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HEAT
SHRINK CREEPAGE EXTENSION SHEDS
(RAIN SHED / SKIRTS) |
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Heat Shrinkable Creepage Extension Sheds ( Rain
Sheds / Skirts) are manufactured from high
quality cross linked polyolefin material that offer
exceptional non tracking behavior, insulation and long term service
reliability. They possess advantageous physical properties,
excellent aging stability and very good resistance
against chemicals. Due to its excellent combination of
properties as an inbuilt character of the base polymer, find proven
applications in electrical segment of industries.
The following are few typical applications where
these extension sheds are used:
- As an integral part of Heat Shrinkable terminations
upto 72 kv voltage class for Indoor & outdoor
application where they provide extension to creepage
path of the cores of the cable terminations.
- To provide extension creepage length and to avoid
continuity during rainy season and to avoid short
circuiting of the electrical net words as case to case
bases as per system requirement.
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Code
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ØA
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D
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D
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H
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Lº
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T
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(min)
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s
(min)
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f
(max)
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min
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f
(min)
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| GRS - 130-1 |
91 |
36 |
12 |
17 |
10 |
2.6 |
| GRS - 130-2 |
127 |
51 |
21 |
20 |
10 |
3.5 |
| GRS - 130-3 |
143 |
67 |
31 |
24 |
10 |
3.5 |
| GRS - 130-4 |
143 |
75 |
35 |
24 |
10 |
3.5 |
All dimensions are in mm.
D: Internal diameter s: as supplied; f: after free recovery
TECHNICAL SPECIFICATION
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Properties
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Value
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Standard
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Physical
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| Tensile Strength |
12 N/mm² (MPA) |
ASTM D638 |
| Ultimate Elongation |
350% (Min.) |
ASTM D638 |
| Density |
1.15 +/- 0.2
gm/cm³ |
ASTM D792 |
| Hardness |
45 +/- 10 Shore D |
ASTM D2240 |
| Water Absorption |
0.5 % (max.) |
ASTM D570 |
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Thermal
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Accelerated Ageing
Tensile Strength
Ultimate Elongation |
(120oC
for 500 Hrs)
11 N/mm2 (Mpa)
(min.)
300 % (Min.) |
ASTM D2671
ASTM D 638
ASTM D 638 |
Low temperature Flexibility
(-40oC for 4 Hrs.) |
No Cracking |
ASTM D2671 |
Heat Shock
(250oC for 30 Min.) |
No Cracking or flowing |
ESI 09-11 |
| Shrink Temperature |
125°C |
IEC 216 |
| Continuous Temperature limit |
-40°C to + 100°C |
IEC 216 |
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Electrical
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| Dielectric Strength |
12 KV/mm. (Min.) |
ASTM D149 |
| Volume Resistivity |
1 x 1014
Ohm.cm(min.) |
ASTM D257 |
| Dielectric Constant |
5 (Max.) |
ASTM D150 |
| Resistant to track & erosion |
No tracking,erosion or
flame failure upto 3.25
KV for 20 min. |
ASTM |
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