Featured Content

• 

  Evaluating Condition of Old Porcelain Cap & Pin Suspension Insulators

  in Insulators

  Many insulators in service are either reaching or have already crossed the threshold of their expected operational lifetime. Read More >

• 

  Considerations in Measuring Arrester Surface Temperature

  in Arresters

  Thermal imaging has been used as a practical, cost-effective means of assessing the health of arresters for more than two decades but it is not always clear how to determine what is a good or bad surface temperature profile. Read More >

• 

  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 >

• 

  Internal Arc Test of Medium Voltage Switchgear (Video)

  in All Articles, HV/HP Testing

  The probability of occurrence of an internal arc in metal enclosed medium voltage switchgear during its entire service life is very low but cannot be completely disregarded. Read More >

• 

  Bushings Technology Review

  in Bushings

  Bushings must provide reliable electrical insulation both internally (against breakdown) and externally (against flashover) of the conductor exposed to the rated voltage and to periodic service overvoltages – even under contaminated conditions. Read More >

• 

  Reviewing Cable & Accessory Design: MV to EHV

  in Cables & Accessories

  The comparative cost disadvantage for cables versus overhead lines has been decreasing due to new materials and improved production processes. Read More >

• 

  Dimensionamiento de pararrayos para sistemas de subtransmisión que utilizan transformadores de puesta a tierra

  in Aisladores, INMR Español

  Los transformadores de puesta a tierra se utilizan para detectar fallas de línea a tierra y estabilizar el neutro durante situaciones de desequilibrio del sistema, como fallas. Read More >

• 

  Applying Surge Arresters to Mitigate Breaker Transient Recovery Voltage

  in Arresters

  The most severe Transient Recovery Voltage from an amplitude point of view follows interruption of the first phase to clear an ungrounded three-phase fault. Read More >

• 

  Understanding Energy Rating of Distribution Arresters

  in Arresters, Editorial Columns, Woodworth on Arresters

  Read More >