Gas Insulated Switchgear (GIS) offers high reliability, safety, and maintenance-free features in a much smaller space, compared with conventional switchgear.
- 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.