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  • An Electrostatic Simulation of a Surge Arrester
    The surge arrester example presented on these pages is based on a document from the International Electrotechnical Commission (IEC) -- "Guide for the determination of voltage distribution along the length of metal-oxide surge arresters". ElecNet simulation results were compared to some results
  • Surge Arrester: Minimizing Electric Field Stress in Resistors
    The voltage distribution along the resistors in a surge arrester is uneven due to stray capacitances. It is possible to reduce the maximum electric field stress by a careful choice of position for the grading rings. In this example, OptiNet is used with ElecNet to find where the rings should
  • Thermal Characteristics of a 330 KV Surge Arrester
    Surge arresters are used in a number of industries as protective devices against a variety of electrical events such as high voltage lightning impulses. The design choices of various materials and components for lightning arresters may depend on their thermal characteristics among many other
  • Monitoring of Surge Arresters through Thermographic Inspection - Case Studies
    In this paper we present evaluation cases of surge arrester operational conditions, through thermographic inspections, criteria applied in the field, and analysis carried out in units removed from operation due to the problems indicated by thermograms. Chesf (Companhia hidroelétrica do São
  • Combing GDTs and MOVs for Surge Protection of AC Power Lines (.pdf)
    for equipment connected to AC power lines.The role of gas discharge tube (GDT) surge arresters specifically designed for AC power line protection will also be discussed. The first step in providing an effective defense against power line transients is to accurately characterize the transients. One good
  • When lightning strikes wind turbines
    for lightning strikes. Operators of wind-turbine installations (WTIs) of course want to minimize downtime and repairs. So well-designed surge protection is a necessity for this equipment. WTIs have a lot of technology crammed into a small space. A transformer station inside the tower adapts the generator

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