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  Application of Composite Insulators at Substations: Policy, Driving Forces & Service Experience

  in Insulators

  Due to safety concerns, composite type hollow core insulators were introduced at Swedish substations by the late 1990s and it has since become the TSO’s technical policy to use only such insulators for all apparatus. 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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  Pollution Design of HVDC/UHVDC Outdoor Bushings

  in Bushings, Pollution

  Different bushings are used to connect the AC line to the DC line at HVDC substations. Read More >

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  Simulation of Electric Field: What & What Not to Expect

  in HV/HP Testing

  Numerical simulations are commonly required for composite insulators equipped with grading rings to ascertain electric fields in sensitive areas, including on the grading ring and end fittings; on the housing surface; and at the triple point where air and housing meet the metallic end fitting. Read More >

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  Overview of Failure Modes of Line Insulators

  in All Articles, Insulators

  Electrical, mechanical and environmental service stresses can result in significant differences in types and rates of failures of the three different insulator technologies. Read More >

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  Interchanging Traditional MV Porcelain Bushings with Composite Polymeric Types

  in Bushings

  Replacement or retrofit of medium voltage bushings is common practice after decades operating a power transformer. Read More >

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  Applying Interphase Spacers to Control Conductor Galloping

  in Utility Practice & Experience

  Composite insulators have offered solutions in such applications as interphase spacers to prevent conductor galloping. Read More >

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  Cómo identificar pararrayos de calidad para la protección contra los sobrevoltajes

  in INMR Español, Pararrayos

  Read More >

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  Composite Insulating Cross-Arms for 400 kV Lattice Towers

  in Utility Practice & Experience

  A great deal of research has been devoted to finding tower designs that utilize composite cross-arms to replace insulators as well as traditional steel cross-arms. Read More >