The main aim of Gas Insulated Switchgear (GIS) diagnostic methods is the change of GIS maintenance philosophy from time-based maintenance to maintenance based on the GIS current condition.
GIS diagnostics includes the following tests:
- operating times
- current and voltage of closing and trip coils
- contact speed
- the voltage drop of the main circuit
- the quality of SF6 gas in every gas-tight compartment
- blockades check
