The characteristics of GIS

1. Compact structure and small size.

This is the most obvious advantage of the inflatable cabinet. Because the gas with high insulation strength (such as sulfur hexafluoride SF or nitrogen) is used as the insulation medium, the insulation distance between phase and ground is greatly reduced. Compared with the traditional air-insulated switchgear, the volume of inflatable cabinets can be reduced by 50% or even more, which is especially suitable for places with expensive land or limited installation space (such as basements, wind power towers, offshore platforms, etc.).

2. High reliability and safety

Fully sealed structure: high-voltage live parts (such as bus bars, circuit breakers, disconnectors, etc.) are all sealed in a stainless steel or aluminum alloy gas box filled with gas. This makes the equipment not affected by the external environment, such as condensation, pollution, salt spray, small animal invasion, etc., which greatly reduces the flashover or short circuit accidents caused by environmental factors.

Good explosion-proof performance: because the live part is isolated from the outside world, it can effectively limit the expansion of accidents even in extreme fault situations. The gas box can usually withstand a certain internal arc pressure to ensure personal safety.

Strong ability to resist natural disasters: in coastal areas, high altitude areas or heavily polluted areas, the adaptability of inflatable cabinets far exceeds that of ordinary switchgear.

3. The maintenance workload is extremely low

Because the primary high-pressure part is completely sealed, the internal parts are hardly in contact with oxygen and water, so oxidation and aging are not easy to occur. Theoretically, the switch equipment inside the inflatable cabinet belongs to maintenance-free products. Daily maintenance usually only needs to check the gas pressure, operating mechanism and secondary loop, which greatly reduces the operation and maintenance cost of the whole life cycle.

4. Strong environmental adaptability

No matter whether the external environment is wet, dry, cold or hot, as long as the air box is well sealed, the high-voltage insulation performance in the cabinet can remain stable. It can even be completely immersed in water in a short time without being damaged (provided that the air box is well sealed), which is impossible for an air insulated cabinet.

5. Modularity and flexible combination

Inflatable cabinets usually adopt modular design, and different units (such as incoming and outgoing cabinets, metering cabinets, lifting cabinets, circuit breaker cabinets, load switch cabinets, etc.) can be combined together through bus connectors according to the requirements of main wiring. This splicing method is not only flexible, but also saves space.

6. Consideration of environmental protection and gas use

Traditional technology: SF gas is widely used in the early days and now, which is a powerful greenhouse gas, and its potential greenhouse effect is 23500 times that of carbon dioxide. Therefore, gas leakage must be strictly controlled in the process of equipment production, operation and maintenance.

Environmental protection trend: With the improvement of environmental protection requirements, the industry is promoting the use of dry air, nitrogen, or the use of environmentally friendly alternative gas to fill cabinets. This kind of environment-friendly inflatable cabinet reduces the use of greenhouse gases while retaining the above advantages.

summary

To put it simply, the core characteristics of the inflatable cabinet are: small size, great ability, no love of bad, and can be used everywhere. It solves the pain point of insufficient space and harsh environment for urban power grid and industrial users, and is one of the core