Heat Shrinkable Stress Control Tubing

All dimensions are in mm Drawing depicts typical dimensions E - as supplied S - after free recovery D - internal diameter L - Length as per requirement

Heat Shrinkable Stress Control Tubes are used to control high electrical stresses at insulation screen terminating pointing in High Voltage Plastic and Paper insulated cable Joints and Terminations up to 36kV. Also control the high stresses over the connectors in joints. The Stress Control Tubings are made from thermally stabilised cross linked high permitivity and high resistivity polymeric material.

CODESIZEDia DT
ESS
MinMax±20%
RSCT26/1226122.0
RSCT30/1530152.0
RSCT45/2045202.5
RSCT50/2550252.5
RSCT65/3065302.5
CharacteristicsValueTest Method
Physical Properties
Specific gravity1.2±0.2ASTM D-1505
Water adsorption1% (max)ASTM D-570 /ISO 62
Tensile strength10 N/sqmm (min)ASTM D-412 /ISO 37
Ultimate elongation200% (min)ASTM D-412 /ISO 37
Hardness40±3 shore DASTM D-2240
Thermal Ageing Tests (120°C for 500hrs)
Tensile strength8 N/sqmm (min)ASTM D-412 /ISO 37
Ultimate elongation100% (min)ASTM D-412 /ISO 37
Thermal Tests
Heat Shock (30min, 200°C)No cracking / No flowESI 09-13
Low temp. flexibility (-40°C)No crackingASTM D-2671
FlammabilitySelf extinguishingASTM D-2671-B
Electrical Properties
Volume resistivity1x109 Ohm-cm (min)ASTM D-257 /IEC 93
Dielectric constant15 (min)ASTM D-150 /IEC 250
Chemical Properties
Fungus resistance<1ASTM G-21
Salt spray testNo pitting / No corrosionASTM B-117
Chemical resistance immersion in following liquids NaOH(40%), H2So4(3%), Toluene, Acetone for 24 hrs at room temp.Good (No visual defects)ISO 175