Partial discharge monitoring on GIS systems Portable

Description

GISmonitor is a portable unit for partial discharge measurements on gas-insulated switchgear (GIS) caused by hopping particles, floating potentials, cracks in insulators or spacers, or other degradation in the insulation system.  GIS monitor offers parallel real time PD acquisition on up to 40 channels. PD measurements can be easily applied on GIS systems without the need of interrupting the operation. Such temporary online monitoring helps to identify internal imperfections of the insulation system, which may lead to breakdown and system failure in the future.

Due to the dielectric properties of the SF6 gas, partial discharge activity in gas insulated switchgear covers a bandwidth of well beyond 2 GHz. The mechanical properties of the components of gas insulated switchgear further allow transmission of such signals over a distance of a couple of meters. Thus, the partial discharge monitoring of GIS equipment is done preferably in the UHF range.