Stress Control Tubes

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Stress Control Tubes

REPL heat shrinkable stress control tubes (RSCT) are used to control high electrical stresses at the primary insulation carbon screen terminating point in high voltage plastic and paper insulated cable joints and terminations up to 36kV.
 
These tubes can also control the high stresses over the connectors in joints. The stress control tubes are made from thermally stabilized, cross linked, high permittivity and high resistivity polymeric materials.


 


 
SIZE D T
  E S s
  Min Max ±0.2
RSCT 26/12 +* 26 12 2.00
RSCT 40/14 + 40 14 2.40
RSCT 50/17 + 50 17 2.70
RSCT 55/21 + 55 21 2.80
RSCT 65/24 + 65 24 2.80
RSCT 75/30 + 75 30 2.80
 

+ Available in discrete lengths primarily.

* Special size subject to minimum volume requirements.
- Custom sizes are available on request with minimum volume requirements.
 
 
 

 

 

 

 

 

Characteristics Value Test Method
Physical Properties    
Specific gravity 1.19±0.2 ASTMD-1505
Water absorption 1 % (max) ASTM D - 570/ISO 62
Tensile strength 10 N/sqmm (min) ASTM D-412/IS0 37
Ultimate elongation 200 % (min) ASTM D-412/IS0 37
Hardness 40 ± 3 shore D ASTM D - 2240
Longitudinal change ±10% ESI 09-13
Shrink temperature 120¡ C (min) IEC-216
Thermal Ageing Tests (120¡C for 500hrs)    
Tensile strength 8 N/sqmm (min) ASTM D-412/ISO 37
Ultimate elongation 100% (min) ASTM D-412/ISO 37
Thermal Tests    
Heat Shock(30 min,200¡C) No cracking / No flow ESI 09-13
Low temp. Flexibility No cracking ASTM D - 2671
Flammability Self extinguishing ASTM D - 2671 - B
Electrical Properties    
Volume resistivity 9 1 x 10 Ohm - cm (min) ASTM D-257/I EC 93
Dielectric constant 15 (min) ASTM D-150/IEC250
Chemical Properties    
Fungus resistance 1 (max) ASTM G - 21
Salt spray test No pitting / No corrosion ASTMB -117
Chemical resistance immersion in following liquids
NaOH (40%), H2S04 (3%),Toluene, Acetone for 24 hrs
at room temp.
Good (No visual defects) ISO 175

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