Featured Content

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  Dielectric Frequency Response to Diagnose Condition of Bushings

  in Bushings, Maintenance

  It is important that all maintenance programs include bushing condition assessment since a problem with even a single bushing can prevent a transformer/reactor from returning to service. Read More >

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  Arrester Housing Design & Application

  in Arresters

  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 feature a rubber material on the outside and a strength member binding the MOV disks beneath. Read More >

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  Selecting Insulators for Polluted Environments: Utility Perspective

  in Insulators, Pollution

  Past technical recommendations such as IEC/TR 60815 as well as newer specifications such as IEC/TS 60815 are both used by power utilities for insulator selection in polluted outdoor environments. Read More >

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  Bad Things Are Going to Happen to Power Lines & Insulators

  in Insulators

  In recent years, there have been a succession of catastrophes across the globe linked to extreme climatic events that also severely cripple power systems in the areas affected. Read More >

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  PD Measurements for HVDC Cable Projects

  in Cables & Accessories

  For the first time ever, long land-based transmission links are being implemented with extruded cable systems at a nominal voltage of ±525 kV. Read More >

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  Applying Sheath Voltage Limiters to Protect HV Power Cables

  in Arresters, Cables & Accessories, Utility Practice & Experience

  If segmentation is used to interrupt induced sheath current, measures must be taken to limit voltage induced on the sheath during transient events. Read More >

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  Corona’s Threat to Polymeric Insulation

  in All Articles, Corona, Insulators

  Polymeric materials are more susceptible to degradation from UV produced by corona than from solar radiation, particularly if the corona takes place close to the material. Read More >

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  Revisions of IEC/TS 60815 Series & IEC 62217

  in Insulators

  Revision of IEC 62217-2012 as well as IEC TS 60815-1/-2/-3:2008 started from 2017 under IEC TC 36 MT19 and WG11. Read More >

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  Implementing a Compact 400 kV Line

  in Utility Practice & Experience

  Integration of renewable energy sources into the electrical system in Germany has required adapting and expanding the existing grid. Read More >