What is a gas insulated switchgear?

2025,04,28

Gas Insulated Switchgear (GIS) is a Metal-Enclosed Switchgear that uses high-insulation gas (such as sulfur hexafluoride SF₆) as an insulating and arc-extinguishing medium. Compared with traditional air-insulated switchgear (AIS), gas-insulated switchgear has the advantages of compact structure, safety and reliability, and strong environmental adaptability, and is widely used in medium and high voltage power systems.

Jutai Platform XGN15 series gas-insulated switchgear is a metal-enclosed ring network switchgear with SF6 load switch as the main switch. It is suitable for power systems with voltage levels of 12kV, 24kV and 35kV, and can meet the power control and protection needs of different scenarios such as urban distribution networks, industrial enterprises, and high-rise buildings.

Structure and working principle of XGN15 series gas-insulated switchgear

1. Main structure

XGN15 series gas-insulated switchgear adopts modular design, and the main structure includes:

SF6 load switch unit: Sulfur hexafluoride (SF6) gas is used as arc-extinguishing and insulating medium to ensure high reliability and long life.

Metal enclosed housing: fully sealed structure to prevent external dust, moisture, etc., and improve equipment stability.

Busbar system: copper or aluminum busbar connection to ensure low resistance and high conductivity.

Operating mechanism: equipped with spring energy storage or electric operating mechanism, supporting manual, electric and remote control.

Protection and monitoring unit: optional intelligent monitoring module to monitor the operating status of the equipment in real time and improve operation and maintenance efficiency.

2. Working principle

XGN15 series gas-insulated switchgear uses the high insulation and excellent arc extinguishing ability of SF6 gas to quickly extinguish the arc during the opening and closing process of the switch to ensure the stable operation of the power system. Its working process is as follows:

Closing operation: the operating mechanism drives the contacts to close and the current flows normally.

Opening operation: when the system needs to cut off the current, the SF6 gas quickly cools and extinguishes the arc to ensure safe disconnection of the circuit.

Insulation protection: SF6 gas provides stable insulation performance under high voltage environment to prevent discharge and short circuit.

Performance advantages of XGN15 series gas-insulated switchgear

1. High safety

Fully enclosed structure: metal casing protection to prevent external environment (such as dust, moisture, small animals, etc.) from affecting equipment operation.

No fire risk: SF6 gas is non-flammable and explosion-proof, suitable for places with high safety requirements.

Reliable arc extinguishing ability: SF6 gas has extremely strong arc extinguishing ability, ensuring that there is no risk of re-ignition when the switch is disconnected.

2. Long life and low maintenance

Maintenance-free design: SF6 gas has stable chemical properties, good equipment sealing, and basically no regular maintenance is required.

Strong corrosion resistance: The metal casing is made of high-quality materials and is suitable for various harsh environments.

3. Compact design, space saving

Compared with traditional air-insulated switchgear, the XGN15 series is smaller in size and is particularly suitable for places with limited space, such as urban substations, underground distribution rooms, etc.

4. Environmental protection and energy saving

SF6 gas is non-toxic and pollution-free, and meets environmental protection requirements (recycling must be ensured).

Low energy consumption design reduces operating costs.

5. Intelligent control (optional)

Supports remote monitoring, fault diagnosis, automatic alarm and other functions to help build smart grids.

Application scenarios of XGN15 series

XGN15 series gas-insulated switchgear is widely used in:

✔ Urban distribution network: Applicable to ring network power supply system to improve power supply reliability.

✔ Industrial power: Provide stable power control for factories, mines, etc.

✔ High-rise buildings and commercial centers: Compact design is suitable for distribution rooms with limited space.

✔ New energy power generation: Applicable to new energy grid-connected systems such as photovoltaic and wind power.

Author:

Mr. jiawenhan

E-mail:

JT13797437282@gmail.com

Phone/WhatsApp:

+86 13797437282