SF6 Gas-insulated switchgear diagnostics
The primary goal of employing diagnostic methods for Gas-Insulated Switchgear (GIS) is to shift the maintenance philosophy from time-based to condition-based maintenance specific to the actual state of the GIS.
GIS diagnostics include the following tests:
- Operating times
- Current and voltage of closing and trip coils
- Contact speed
- Resistance of the main current circuits
- Quality of SF6 gas in all gas-tight compartments
- Verification of interlocks