Gas Insulated Switchgear (GIS)

Online Partial Discharge Monitoring of Gas Insulated Switchgear (GIS)
The number of installed GIS substations increases rapidly all over the world. The reliability of GIS is improving as technology develops and improved designs are introduced. With increasingly reliable equipment, the role of PD diagnostics becomes more important and the following expectations of asset manager can be indicated:
• move from time based to condition based maintenance,
• extend the operation intervals, reduce maintenance costs,
• prevent damages, decrease unplanned outages,
• enhance the availability and reliability of equipment,
• detect defects before breakdown by warning and alarm functions,
• reduce risk of expensive collateral damages (as fire in sustations),
• extend the economic life time of equipment and avoid premature retirements,
• improve safety of service personnel,
• reduce environmental risks.