GIS organically combines the primary equipment except transformer in substation, including circuit breaker, disconnector, grounding switch, voltage transformer, current transformer, lightning arrester, bus, cable terminal, inlet and outlet bushing, etc. By optimizing the design into a whole.
Because sulfur hexafluoride gas with good insulation performance is used as insulation and arc extinguishing medium, the volume of substation can be greatly reduced and miniaturization can be realized. Three-phase * * * box-type compact GIS has a minimum interval width of 0.8m, and the standard interval covers an area of only 2.9m2 Generally, the area occupied by 220kV GIS equipment is 37% of that of conventional equipment. 1 10kV GIS equipment accounts for about 46% of conventional equipment.
Extended data:
GIS characteristics
1, reliability and safety
Because the charged part is completely sealed in inert SF6 gas, it is not in contact with the outside world and is not affected by the outside environment, so the reliability is greatly improved. In addition, because all the components are combined into a whole, it has excellent seismic performance. Because the live part is sealed in the grounded metal shell, there is no danger of electric shock. SF6 gas is nonflammable, so there is no fire danger.
Moreover, because the charged part is surrounded by the metal shell, it can shield electromagnetism and static electricity, with low noise and strong anti-radio interference ability.
2. Strong adaptability
Suitable for areas with harsh environmental conditions (such as serious pollution, hail, heavy snow, excessive water exposure, high altitude and frequent earthquakes). ).
3. Installation and maintenance
The installation period is short. Because of miniaturization, the whole machine can be assembled and tested in the factory, and then delivered to the site in the form of units or intervals, thus shortening the installation cycle on site and improving the reliability. Because of its reasonable structural layout and advanced arc extinguishing system,
The service life of the product is greatly improved, so the maintenance cycle is long, the maintenance workload is small, and it is miniaturized, the floor is low, and the daily maintenance is convenient.
Baidu Encyclopedia-Sulfur Hexafluoride Enclosed Combined Electrical Apparatus