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Pfisterer, one of the world’s leading independent specialists and system suppliers for energy infrastructure, has unveiled its new eco-friendly self-supporting dry insulated termination
Pfisterer has been supplying solid-insulated and lighter than conventional oil or gas-filled terminations, dry outdoor cable terminations, worldwide for decades. The company’s silicone solid insulation ensures environmental and operational safety as well as durability in use in substations and on overhead lines, sustainable and with little risk of leakage.
With the new Dry Outdoor Composite (DOC) termination, Pfisterer is presenting the first self-supporting, dry-insulated version up to 170 kV at the Middle Eastern Energy event in Dubai. The company claims the system has quick install features and is reliable in maintenance-free long-term use while connecting cable systems to overhead lines and busbars.
Preassembled and pretested
The DOC central unit, comprising a hollow insulator, stress grading device and base plate, is delivered to the site by Pfisterer, fully preassembled and routine tested. According to Pfisterer, Testing under IEC 60840 section nine is carried out on the whole central unit. DOC meets all criteria of the highest pollution class according to IEC 60815-3 standards. It is, therefore, said to be suitable for areas with high levels of dust, even deserts.
Fitted in minutes
The modular design of the DOC simplifies handling across the board during transportation and installation while reducing the installation time to a few minutes. Since the central unit is fully preassembled, it simply pushes onto the cable and with the number of elements to be fitted is minimised, time-consuming glueing work and drying phases are eliminated. Thanks to the silicone solid insulation, no oil or gas work are required on site. Austrian grid operator Energie Steiermark quickly recognised the advantages of the DOC and used the solution for a substation in Graz, said Pfisterer.