General requirements for Heat Shrinkable Termination Kit
2022-08-24
The stress control function at the screen cut back shall be provided by thermally stable heat shrinkable stress control tubing in combination with high permittivity void filler mastic over the screen end. The impedance of the stress control tubing shall not change over a range of temperature from 0 Deg. C to 125 Deg. C. The impedance shall also remain constant irrespective of the differences in stress which will exist within the tubing due to the heating effect within the conductor and the temperature of environment.
The Heat Shrinkable Termination kits offered shall provide for total environmental sealing of the cable crotch. A cable breakout with sealant coating should be provided for 3 core cable terminations.
Adequate quantity of sealant strips for application over the lug barrel and exposed strands between the lug and cable insulation shall be provided in the kit.
Anti-tracking breakout Insulation Tubing shall be supplied to provide complete leakage insulation between the lugs and the cable breakout to prevent the cable insulation from the effects of weathering and electrical tracking caused by the leakage current flowing over the insulation surface. The tubing shall be coated with non tracking flexible sealant at one end. Single piece, heat shrinkable weather sheds having non tracking, weather resistant properties shall be supplied with the kits for application over non tracking tubing. The quantity of sheds to be supplied shall depend upon voltage grade and Indoor / Outdoor application and shall be indicated in the kit content list.
Connection of the copper tape screen to ground shall be achieved by tinned copper braids of adequate cross section secured in place with constant force stainless steel roll springs.
Each kit shall be provided with complete detailed installation instruction and be clearly marked to show its application.
Three copies of the instruction for the installation of each type of cable termination supplied, shall be submitted to the engineer.
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