Heat Shrinkable Stress Control Tubings are
used to control high electrical stresses at insulation screen terminating point in high
voltage plastic and paper insulated cable joints and terminations up to 36KV. They 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.
Material
Specifications
Product color
- Black
Characteristics
Value
Test
Methods
Physical Properties
Specific
gravity
1.2+0.2
ASTM D-1505 /
ISO1183
Water
absorption
1%(max)
ASTM D-570 /
ISO62
Tensile
strength
10 N/sqmm
(min)
ASTM D-412 /
ISO 37
Ultimate
elongation
200%(min)
ASTM D-412 /
ISO 37
Hardness
45+3
Shore D
ASTM D-2240
Thermal Ageing Tests (120° C for 500 hrs)
Tensile
strength
8 N/sqmm(min.)
ASTM D-412 /
ISO 37
Ultimate
elongation
100%(min.)
ASTM D-412 /
ISO 37
Thermal Tests
Heat
shock(30min,200°C)
No Cracking /
No flow
ESI 09-13
Low temp.
Flexibility(-40°C)
No Cracking
ASTM D-2671
Flammability
Self
extinguishing
ASTM D-2671-B
Electrical Properties
Volume
resistivity
109 Ohms-cm
(min)
ASTM D-257
/IEC 93
Dielectric
constant
15(min.)
ASTM D-150/
IEC 250
Chemical Properties
Fungus
resistance
<1
ASTM G-21
Salt spray
test
No Pitting /
no corrosion
ASTM B-117
Chemical
resistance immersion in following liquids-NaoH(40%), H2SO4(3%),
Toluene, Acetone for 24hrs at room temp.
Good (No
visual defects)
ISO - 175
PRODUCT DIMENSIONS
Size
Dia D
T
E
S
S
Min.
Max.
+20%
26/12
26
12
2.0
30/15
30
15
2.0
45/20
45
20
2.5
50/25
50
25
2.5
65/30
65
30
2.5
76/38
76
38
2.5
All dimensions are in mm
E-As supplied
D-Internal diameter without adhesive coating
Drawing depicts typical dimensions
S-After free recovery
L-Length as per requirement
|Products|
Heat Shrinkable Components and Tubings for Power Cables