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  • Benefits Justify More Use of Transmission Line Arresters
    Application of gapped (EGLAs) or non-gapped (NGLAs) transmission line surge arresters (TLSAs) offers perhaps the best opportunity for power engineers to improve system reliability. However, as important as this may be, the value of using them transcends this one objective alone.
    2022-01-20
  • Arrester Protection Distances at Substations
    Protection against overvoltages using gapless zinc oxide surge arresters has been accepted and adopted worldwide. In particular, assets such as transformers, cables and gas-insulated substations are highly vulnerable to transient surges from lightning and switching.
    2022-01-15
  • Test Requirements for HV Bushings insulator arrester
    Bushings are key components of HV substation equipment such as transformers and switchgear, allowing conductors to transfer energy from one insulating medium to another. Most typically, this is from an oil or SF6 insulation environment to air.
    2021-12-27
  • Testing for Safety & Risks Affecting Operation of HV Cable Terminations, Bushings & Arresters
    Not long ago, a HV cable termination operating in a Mediterranean country experienced catastrophic failure, sending high velocity porcelain shards in all directions.
    2021-12-23
  • Impact of Arrester-Transformer Separation Distance at Substations
    How far from a transformer can arresters be located yet still ensure an adequate margin of protection? As explained by Jonathan Woodworth in this edited contribution to INMR, the answer is seldom simple.
    2021-12-08
  • Optimizing Installation of Distribution Arresters
    There are some 200 to 300 million distribution transformers in service worldwide. Of that population, a few hundred thousand are likely protected in a fashion similar to what is shown below, taken from a single-phase distribution line in North Africa.
    2021-09-17
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