Creepage Extension and Strain Relief Sheds

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Creepage Extension and Strain Relief Sheds

Heat shrinkable Creepage Extension Sheds (CES) are used to increase the surface creepage distance of the protected cores of cable terminations without increasing the tail length.
Heat shrinkable Strain Relief Sheds (SRS) are used to restrict the cable cores from over bending thus protecting from damage in the terminations near the crutch area.(Especially in PILC cable Outdoor terminations).
The Creepage Extension Sheds and Strain Relief Sheds are made of from thermally stablised, cross linked, non tracking and weather resistant polymeric material.

The Creepage Extension Sheds and Strain Relief Sheds are internally coated with water resistant mastic.
 

 


 
PRODUCT DIMENSIONS -SRS Series
TYPE A d H D TS TF
  ± 2 EMin S Max Min Max S±20% S±20%
SRS1 145 35 17 26 30 4 2.8
SRS 2 169 45 25 28 40 4 2.8
SRS 3 169 60 25 28 40 4 2.8
 
TYPE D d H e TS TF
  ±2 EMin S Max Min Max S±20% S±20%
CES1 92 35 13 17 10° 2.5 2.5
CES2 124 47 21 20 10° 2.8 2.8
CES3 142 57 31 24 10° 2.8 2.8
CES4 142 72 41 28 10° 2.8 2.8
               
 

 

Characteristics Value Test Method
Physical Properties    
Specific gravity 1.19±0.2 ASTM D-1505
Water absorption 1 % (max) ASTM D-570/ISO62
Tensile strength 6 N/sqmm (min) ASTM D-412/IS0 37
Ultimate elongation 200% (min) ASTM D-412/IS0 37
Hardness 28 ± 3 shore D ASTM D-2240
Thermal Ageing Tests (120°C for 500hrs)    
Tensile strength 5.5 N/sqmm (min) ASTM D-412/IS0 37
Ultimate elongation 100% (min) ASTM D-412/IS0 37
Weatherability Tests (5000hrs in U.V. Tester)    
Tensile strength 5.5 N/sqmm (min) ASTM D-412/IS0 37
Ultimate elongation 200% (min) ASTM D-412/IS0 37
Electrical Properties    
Volume resistivity 1x10¹² Ohm-cm (min) ASTM D-257 / I EC 93
Dielectric strength 10kV/mm (min) ASTM D-149/IEC243
Dielectric constant 5 (max) ASTM D-150/IEC250
Resistant to tracking and erosion
No tracking, erosion or flame failure
up to 3.25 kV for 20 mins
ASTM D-2303

 

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