SF6 gas leakage alarm device

1、 Technical performance of SF6 gas leakage alarm device

1. Detection and display of SF6 gas concentration exceeding the standard, polling detection and display of SF6 concentration at each gas detection unit (sensor) in the switch room. When the concentration exceeds 1000ppm (can be set), a red abnormal data prompt will be displayed.

2. Oxygen concentration detection and display, polling detection and display of oxygen concentration at each gas detection unit in the switch room. When the concentration is ≤ 18.0%, a red abnormal data prompt will be displayed.

3. SF6 and oxygen concentration control function. When the SF6 gas concentration exceeds or the oxygen concentration is lower than the set value, control the fan to start ventilation until the SF6 and oxygen concentrations return to normal, and continue ventilation for 15 minutes.

4. Timed ventilation can be set to ensure that the switch room can be ventilated as needed every day.

5. Forced ventilation is possible, and when the fan is in a stopped state, it can be controlled in the system for 15 minutes of forced ventilation; When the fan is turned on, it can be forcibly turned off in the system and the current operating status of the fan can be displayed on the screen.

6. Temperature and humidity detection and display, the system can measure and display the current temperature and humidity inside the switch room.

7. Voice prompt function, with the ability to turn it on and off as well as adjust the volume.

8. The human body infrared sensing function detects the entry and exit of workers within 10 meters of the host through the human body infrared detector when they enter and exit the monitored power distribution room. At the same time, the system can automatically alert the safety status of the environment.

9. The automatic data storage function can store historical data and prevent data loss in case of power failure.

10. The historical data query function allows users to enter the system interface through the menu and query previous alarm data and 360 day continuous monitoring data.

2、 Technical parameters:

1. SF6 concentration measurement range: 0-3000ppm, over limit alarm point: 1000ppm (adjustable)

2. SF6 concentration detection accuracy:<3% FS (FS represents maximum display value, full range 3000ppm)

Repetitive error:<5% FS

Zero drift:<5% FS

Range drift:<5% FS

3. Oxygen content detection range: 1-99%, oxygen deficiency alarm point: 18% (adjustable), if it is below 18%, the alarm output contact will be closed

4. Oxygen content detection accuracy:<1% FS

5. Temperature detection range: -10 to+60 ℃

6. Temperature detection accuracy: ± 0.5 ℃; Display accuracy: 0.1 ℃

7. Humidity detection range: 10-99% RH

8. Humidity detection accuracy: ± 0.5% RH; display accuracy: ± 0.1% RH

9. Power supply: AC 165-260V 50Hz

10. Communication: The communication interface between the system host and the substation control room adopts RS485 interface. MODBUS-RTU communication protocol.

Note: General method for arranging SF6 monitoring points:

The number of detection units is determined based on the area of the monitoring room and evenly arranged. The ratio of indoor area (m2) to the number of detection units (pieces) shall not exceed 25.

SF6 gas leakage alarm device， Please contact us for customization of SF6 gas leakage alarm system!