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Design & Installation of Composite Insulators for HVDC Line in Norway

September 23, 2017 • ARTICLE ARCHIVE, InsulatorsComments Off on Design & Installation of Composite Insulators for HVDC Line in Norway

Statnett is reinforcing the electrical transmission grid in the southwestern part of Norway due to a new HVDC submarine cable connection to Germany. The project consists of 250 km of new transmission lines and voltage upgrading of 60 km of existing transmission lines as well as several new substations. The biggest challenge has been construction ...

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Impact of Changing Environment on Electrical Systems & Insulation

September 23, 2017 • 25 Years of INMR, Utility Practice & ExperienceComments Off on Impact of Changing Environment on Electrical Systems & Insulation

In December 2013, heavy snowfall over the Italian Dolomites plunged skiers and tourists into an extended blackout involving 98% of customers in one of Europe’s most exclusive sports locations. Then, in March 2015, the central part of Italy was overwhelmed...

Combined Load Limitations of Composite Line Posts

September 23, 2017 • ARTICLE ARCHIVE, InsulatorsComments Off on Combined Load Limitations of Composite Line Posts

Line post type insulators have been used to support and insulate overhead lines for over 70 years. First introduced at distribution voltages, their use soon expanded to transmission lines to realize the full potential to reduce cost of new lines – in...

New Plant Supplies Growing North American Demand for Toughened Glass Insulators

September 23, 2017 • ARTICLE ARCHIVE, glass, InsulatorsComments Off on New Plant Supplies Growing North American Demand for Toughened Glass Insulators

By the early 2000s, a major shift had taken place in the United States when it comes to the insulator technologies used on overhead transmission lines. Pushed by the sales efforts of major local suppliers, power system operators had moved decisively in the...

Impact of Icing on Transmission Lines

September 23, 2017 • ARTICLE ARCHIVE, Scene from ChinaComments Off on Impact of Icing on Transmission Lines

Icing problems can have a severe impact on the safe operation of overhead transmission lines. Early in 2008, for example, extensive icing hit large areas of southern China. The rare but disastrous meteorological conditions led to outages on 119 lines at 500...

Specifying IEC Certified Arresters

September 23, 2017 • 25 Years of INMR, ArrestersComments Off on Specifying IEC Certified Arresters

Purchasing specifications for surge arresters are typically comprehensive but often request information that is no longer needed or even appropriate when it comes to MOV type units. This article by Jonathan Woodworth offers recommendations on how to specify...

World Market & Trends for Insulators to 2027

September 15, 2017 • ARTICLE ARCHIVEComments Off on World Market & Trends for Insulators to 2027

With sustained expected growth in the power sector, towers, insulators and fittings will become a global market worth US$ 35 billion by 2025. Insulators alone will account for almost US$ 8 billion of this expanding market segment. Attend the 2017 INMR WORLD...

Assessing Performance of Different Conductor & Line Hardware Configurations

September 15, 2017 • ARTICLE ARCHIVE, HV/HP TestingComments Off on Assessing Performance of Different Conductor & Line Hardware Configurations

There are only a few installations worldwide whose purpose is to assess performance of different designs of line hardware and conductors under stresses caused by environmental factors such as wind and icing. One of these, operated by Hydro-Québec, is located...

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