A gas insulated substation (GIS) is a high voltage substation in which the major structures are contained in a sealed environment with sulfur hexafluoride gas as the insulating medium. GIS technology originated in Japan, where there was a substantial need to develop technology to make substations as compact as possible. The clearance required for phase to phase and phase to ground for all equipment is much lower than that required in an air insulated substation.

Gas insulated substations offer other advantages in addition to the reduced space requirements.

Gas insulated switchgear (GIS) has vacuum circuit breaker and disconnector without maintenance, which greatly reduces maintenance and inspection workload.

The primary applications for gas insulated substations include:

  • High voltage installations
  • Urban Installations
  • Environmentally Sensitive Installations

 

Deha Tech`s electrical engineering team designs and builds high voltage projects across the country, specializing in EPC services for gas insulated substations (GIS), switchyards and substations and high voltage transmission lines.