Gas Insulated Switchgear Substations

The sf 6 gas which has high dielectric property acts as an insulating medium to the high voltage or extra high voltage substation equipment.

Gas insulated switchgear substations.

With gis experience spanning 50 years across a wide range of industries and applications. Comprehensive reference covering all aspects of gas insulated substations including basic principles technology use application design specification testing and ownership issues this book provides an overview on the particular development steps of gas insulated high voltage switchgear and is based on the information given with the editor s tutorial. The portfolio includes gis solutions from 60 to 800 kv along with hybrid mobile and digital gis solutions gas insulated lines and other secondary products to maximize switchgear and network. Gas insulated substations high system reliability highflexibilityofitssolutions modularityexpandability gas insulated substations high flexibility of its solutions modularity expandability compact space saving solutions innovative solutions devices switchgears low life cycle costs reliable and competent partners operator manufacturer.

Located in the heart of zurich 15 meters under ground in a beautifully designed building it replaces an outdoor air insulated switchgear ais substation built in 1949. 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. A switchgear may be a simple open air isolator switch or it may be insulated by some other substance. Gis technology originated in japan where there was a substantial need to develop technology to make substations as compact as possible.

The high voltage conductors circuit breaker interrupters switches current transformers and voltage transformers are in sf6 gas inside grounded metal enclosures. Generally gas insulated substations gis are indoor type as it requires 1 10th of the space required for conventional substations. Ge designs manufactures installs and services a full range of state of the art gas insulated substations gis for utilities and industries worldwide. An effective although more costly form of switchgear is the gas insulated switchgear gis where the conductors and contacts are insulated by pressurized sulfur hexafluoride gas sf 6.

Are housed in separate metal enclosed modules filled with sf6 gas. The portfolio includes gis solutions from 60 to 800 kv along with secondary products to maximize switchgear and network operation. A gas insulated substation gis uses a superior dielectric gas sf6 at moderate pressure for phase tophase and phase to ground insulation. In a gis substation the various equipment like circuit breakers bus bars isolators load break switches current transformers voltage transformers earthing switches etc.

Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. Some of the advantages and disadvantages of gas insulated substations gis are.