SF6 density relay, mixed-gas density relay

Sulfur hexafluoride (SF6) density relays are specialized monitoring and protection devices used in high-voltage electrical equipment. By continuously measuring the pressure and temperature of SF6 gas, they ensure that the gas density remains within a safe range, thereby preventing equipment failures or damage caused by gas leakage or excessively low density. Application scenarios: These relays are widely employed in high-voltage circuit breakers, disconnect switches, and similar equipment to guarantee safety and stability during high‑voltage operation. They are suitable for monitoring SF6 gas sealing systems in substations, power plants, and other high‑voltage electrical installations. Such relays enable timely prevention of potential accidents.

Digital remote transmission-type density relay

The SF6 digital remote‑transmission density relay is an upgraded version of the conventional SF6 density relay. It integrates digital measurement and remote transmission capabilities, enabling more intelligent monitoring of SF6 gas conditions and transmitting real-time data to a remote monitoring center via data communication technologies. This type of relay is particularly well suited for the intelligent management and remote operation and maintenance of modern power systems. Application scenarios: Power systems—suitable for substations, high‑voltage circuit breakers, gas‑insulated switchgear (GIS), and other applications, providing remote, intelligent monitoring of SF6 density. Smart grids—integrated with smart grid management systems.