SF6 Gas Leak Alarm System is an intelligent online detection system designed and developed to provide personal health and safety protection for personnel working in distribution equipment rooms with SF6 equipment, in response to the emphasis on safety in the current power system.
The SF6 gas monitor primarily detects the concentration of SF6 gas and oxygen in the ambient air. When the SF6 gas concentration exceeds the standard or there is an oxygen deficiency, it provides real-time alarms and automatically activates ventilation fans. It also includes features such as temperature and humidity detection, work status voice prompts, remote alarms, and historical data retrieval.
The SF6 gas monitor utilizes infrared measurement principles to quantitatively measure the concentration of SF6 gas in real-time. This not only ensures personal safety but also ensures the proper operation of equipment. It is equipped with original high-precision analog-to-digital converters and long-life oxygen sensors to provide an additional layer of reliable protection for on-site personnel.
The SF6 gas leak alarm system can be widely applied in SF6 switchgear rooms, SF6 circuit breaker rooms, combined apparatus rooms (GIS rooms), SF6 main transformer rooms, and more, across various voltage levels.
SF6, also known as sulfur hexafluoride, is a colorless, odorless, and non-toxic gas at normal temperature and pressure. It is non-flammable, thermally stable, and non-corrosive, making it a versatile material. It exhibits excellent electrical insulation and arc-extinguishing properties, with insulation performance 2 to 3 times that of air, which increases with higher gas pressure.
SF6 gas is a colorless, odorless, non-toxic, and non-combustible inert gas with excellent insulation properties. It is mainly used as an insulating medium for high-voltage switches, large-capacity transformers, and high-voltage cables. For example, SF6 is used as the insulation medium in high-voltage SF6 circuit breakers and gas-insulated substations (GIS). Therefore, SF6 gas plays a significant role in power systems. It is widely used as a gas insulator in electronic devices, radar waveguides, particle accelerators, transformers, surge arresters, and has extensive applications in power, environmental monitoring, metallurgy, medicine, and military sectors.
When indoor switches using SF6 gas as the insulation and arc-quenching medium experience leaks, the leaked SF6 gas and its decomposition products accumulate in the lower spaces of the room, causing local oxygen deficiency and toxicity. This poses a serious risk to the life safety of personnel entering the room. Therefore, detecting the density of SF6 gas and oxygen content in the ambient air with SF6 monitoring systems in substations has become crucially important.