What is the purpose of gas insulated switchgear?
Gas Insulated Switchgear (GIS) is the name for a unit that houses these components and circuits in a single gas tank with a compact footprint. Grounding devices that prevent electrical shock and lightning arresters that prevent dielectric breakdowns from lightning strikes are also included to enhance safety.
What is the difference between air-insulated and gas insulated switchgear?
What’s the difference between AIS and GIS equipment? AIS uses air as the main insulating medium. AIS is further classified as metal-clad or metal-enclosed. Metal-clad switchgear has extensive barriers, shutters, primary bussing covered with insulation, and uses drawout vacuum circuit breakers to interrupt faults.
What is gas insulation substation?
A gas insulated substation (GIS) is a high voltage substation in which the major conducting structures are contained within a sealed environment with a dielectric gas known as SF6, or sulfur hexafluoride gas as the insulating medium.
What is air insulated switchgear?
Air insulated switchgear(AIS) adopts the air as the insulation media designed voltage ranging from 11KV to 36KV medium voltage power distribution system. It plays a controlling and protecting role in the power system. The main circuit components of the air insulated switchgear are built in the gas-filled compartment.
What is the difference between GIS and AIS switchgear?
GIS high voltage substation engineering uses the gas sulfur hexafluoride for insulation, whereas AIS uses air insulation in a metal-clad system. Another significant construction-based difference between the two switchyards is that a metal-clad AIS uses three-position draw-out circuit breakers (on, off and test).
What is switchgear and how it works?
In an electric power system, switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream.
What is AIS switchgear?
What is GIS busbar?
Busbar. The busbar is one of the most elementary components of the GIS system. Co-axial busbars are common in isolated-phase GIS as this configuration results in an optimal stress distribution. Busbars of different lengths are used in GIS to cater to the requirement of circuit or the bay formation.