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February 16, 2019 • Arresters, ARTICLE ARCHIVE, Housing, Housings
Arrester housings are insulators but have properties and design parameters that are not common to insulators. While a composite insulator is made primarily of polymer rubber on the outside and a fiberglass rod or tube on the inside, polymer-housed arresters... Read More
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January 26, 2019 • ARTICLE ARCHIVE, Maintenance
Guidelines for insulator selection under pollution in AC are already available in IEC 60815 series 1, 2 & 3 and work is underway in IEC TC 36-WG 11 as well as in CIGRE WG C4-03-03 to extend them to DC. While these guidelines are intended to simplify... Read More
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January 12, 2019 • ARTICLE ARCHIVE, Cable Accessories
Self-supporting, fluid-filled terminations have been used since the advent of HV cables and continue to be the first choice among most network operators due to their excellent long-term performance. Recently, composite housings have increasingly replaced... Read More
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December 15, 2018 • ARTICLE ARCHIVE, Commentary by Pigini
Given the evolution in computing power and specialized software, finite element analysis (FEA) has evolved from what used to be a mainly academic pursuit into a much-used tool for product development. Engineering simulation technology, for example, now allows... Read More
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June 29, 2018 • ARTICLE ARCHIVE, Insulators
In the past, the main options for support insulators at air-insulated HVAC substations were either solid core porcelain or composite insulators up to 245 kV. In addition, RTV coatings have at times been applied to solid core porcelain post insulators to... Read More
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June 22, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience
In many countries, construction of new HV and EHV overhead lines has triggered divisive public debate, with particular resistance against the use of traditional lattice towers. In the face of this, one way to promote greater acceptance and also minimize the... Read More
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March 17, 2018 • ARTICLE ARCHIVE, HV/HP Testing, Testing
Following the catastrophic failure at a generating station of a T3 bus-tie cable pothead installed in an oilfilled steel tank operating at 13.8 kV, the Transmission Engineering Department at BC Hydro was asked to investigate the cause and develop a repair... Read More
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August 12, 2017 • ARTICLE ARCHIVE, HV/HP Testing, Insulators, Testing
A search for new tower designs was launched in Belgium in early 2008 in conjunction with two new 400 kV projects: Stevin (extension of the 400 kV grid to the coast) and Brabo (reinforcement of the 400 kV grid in the Port of Antwerp). Requirements were:... Read More
