Featured Content

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  Safety of MV & HV Underground Cables & Accessories in Urban Areas

  in Cables & Accessories, HV/HP Testing

  Safety has become an important factor due to the risks linked to catastrophic failures of electrical equipment. Read More >

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  Surge Protection of Substations

  in Utility Practice & Experience

  Protecting substations from lightning and switching surges that lead to insulation flashover has been a key issue for as long as there have been power systems. Read More >

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  Simplified Models of Lightning & Grounding Issues (Part 1 & Part 2)

  in Arresters

  The decision to apply line surge arresters (LSAs) in difficult terrain is informed by estimates of local ground flash density and the ‘critical currents’ that cause flashovers. Read More >

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  Best Practices for Bushing Installation

  in Bushings

  The grid is composed of many components, sometimes with sub-components that all require specific know-how. 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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  Increasing Resilience of Underground Distribution Against Heat Waves (Part 1 of 2)

  in Utility Practice & Experience

  Evolution in cables, joints and terminations has not always been accompanied by a significant increase in line reliability and especially so during persistent heat waves. Read More >

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  Failure of Transmission Line Insulators

  in Insulators

  It is unrealistic to expect that any network component can last forever without failing and it can therefore be assumed that some proportion of insulators will fail in service after a certain period of time. Read More >

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  Increasing Transformer Reliability by Proactive Bushing Fleet Management

  in All Articles, Bushings

  If a bushing fails, the typical result is extended downtime of a power transformer with not only heavy financial losses but also challenges imposed on the system operator to compensate for the lost unit. Read More >

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  World’s Most Bizarre Power Line Structures

  in Transmission Structures

  INMR presents its selection of the most bizarre power structures seen over nearly 30 years reporting on overhead lines across the globe. Read More >