Gas Insulated Switchgear (GIS) offers high reliability, safety, and maintenance-free features in a much smaller space, compared with conventional switchgear.
Features
High reliability
The live parts are sealed in metal enclosures filled with pure SF6 gas. Thus, it is protected from contamination by smoke, chemical fumes, dust or salt-laden spray or as ingress of small animals. This protection prevents the inside components from oxidation and rust caused by oxygen and moisture.
Space reduction
A medium voltage GIS can be installed into a space about half that required for a conventional type air-insulated metal-clad switchgear.
High safety
All the live parts are fully enclosed in grounded metal enclosures. Thus, there is no danger of an electric shock. SF6 is a inert, non-flammable, non-toxic, and odorless gas used as an insulation and arc extinguishing medium. Therefore, it is safe for personnel and there is no fire hazard.
Reduced maintenance costs
Since the live parts are fully enclosed in an oxygen-free and moisture-free environment, there is no aging decay. This leads to a reduction in labor costs for maintenance and inspection.
Short installation time
A GIS of about four panels can be transported fully constructed. The GIS can be energized by connecting external power cables to the pre-fabricated plug-in type terminals. Thus, shortening installation time.
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