High voltage cable accessories 72 kV up to 245 kV

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Silicone rubber is a preferred material for cable accessoriesdue to its excellent mechanical and electrical properties.For more than 40 years silicone has been used successfullyas high-quality electrical insulation for voltages upto 400 kV. Silicone rubber features high quality electricalinsulation, superior corona and tracking resistance,combined with high elasticity. It facilitates multi rangeapplication, where one silicone rubber body can beused for various conductor cross sections. Optimalflexibility ensures easy assembly of the accessories.

Vydal: nkt cables s.r.o. Autor: nkt cables

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.............................................................. 9 KFEV 123-145 ............................................................................. • and ozone resistance • Durable water rejection • Weather and aging resistance • Non-flammable, self-extinguishing, heat resistant/applicable for use temperatures between -50°C and +180°C • High elasticity • High tracking resistance • Unlimited storage life • Friendly the enviroment Outstanding features the silicone rubber insulation material are: The specific electrical problems the cable termination are found the point between the high-grade solid elec- trical insulation the cable and the gaseous insulation air which has significantly lower dielectric strength............................................................................. In order achieve sufficient insulating clearance, the outer conductive layer the cable must stripped below the end the core.................................................................................. 15 Others Accessories ........................... 6 THV 100-145 .................................................................................................................. For more than years silicone has been used success- fully high-quality electrical insulation for voltages up to 400 kV.................................... 3 Silicone rubber ......................................................................... Conductor Core isulation Field lines Outer conductive layer Equipotential lines Screening wires Outer sheath Stress cone Conductor Equipotential lines Core isulation Field lines Outer conductive layer Outer sheath Screening wires g Electrical field with capacitive stress contol (figure 2) 05 g Electrical field without stress contol (figure 1) g NEW g NEW ......................... 5 Stress contol .............................................. 16 Cable data ......................................................................................................................................................................................................................... This causes unacceptably high field intensities the end the outer conductive layer (see figure which must eliminated means special measures...................................... 5 Terminations THV .................................................11 KSEV/KTEV 72-145 .................................................................... Figure shows the field the cable termination controlled capacitively funnel shaped electrode.............................. 12 KSEV/KTEV 123-300 ............................................................................ 14 SME 72-245 ...................................... Silicone rubber features high quality electrical insulation, superior corona and tracking resistance, combined with high elasticity.................. 18/19 04 Silicone rubber and Stress control Silicone rubber preferred material for cable accessories due its excellent mechanical and electrical properties.............................................. This prevents harmful corona partial discharge............................. Optimal flexibility ensures easy assembly the accessories................................................................................................. 10 SEV/TEV 72-170 ................................................................................................................................... 8 FEV 72-245-P ............................................................. is dimensioned such way that field intensities not ex- ceed any point..............Table content General Profile .................................................................. 2 The product range .............................................. facilitates multi range application, where one silicone rubber body can be used for various conductor cross sections......................................................................................................................................................................................................................................................................................................... 7 FEV 72-245-V ............ 17 Certificates ......... 13 Joints SM 72-245 ....................................................................................