According to the situation that the power system emphasizes safety production, the monitoring and alarm subsystem of sulfur six fluoride is an intelligent on-line monitoring and early warning system designed and developed to provide personal health and safety protection for the staff in the power distribution equipment room with SF6 equipment. The system mainly detects the SF6 gas content and oxygen content in the ambient air. When the SF6 gas content in the environment exceeds the standard or there is lack of oxygen, it can give an alarm in real time and automatically turn on the ventilator for ventilation. It has many rich functions such as temperature and humidity detection, working status prompt, remote alarm, historical alarm data query, etc.

    The unique micro SF6 gas detection technology of the system can detect the SF6 gas with a concentration of 1000ppm, which can not only guarantee the personal safety, but also ensure the normal operation of the equipment; the imported high stable oxygen sensor can provide more reliable protection for the field staff.

This subsystem is mainly used in 35kV SF6 switch room and 500kV, 220kV and 110kV GIS room in the substation.

Advantages of the system:

1、Advanced microprocessor technology with LED indicator and buzzer.

2、Set SF6 and oxygen detection, two in one digital transmitter, coordinate work. 

3、They are all imported special brand sensors with good stability and high precision.  

4、Long life design, using gap type work, improve the working stability and service life of SF6 sensor. 

5、Dustproof and dampproof structure design, free of maintenance; reasonable network port layout, convenient for gas circulation. 

6、Digital output, bus design, flexible networking, strong compatibility.  

7、Provide protocol development package and secondary development, and support compatibility with other system platforms.

Technical features:

1、Working power:         AC 220V/50HZ  

2、Probe detection range:     sulfur hexafluoride: 100-1000ppm (V / V); oxygen: 1% - 25% probe detection accuracy: sulfur hexafluoride ≤ 5ppm F.S; oxygen concentration ≤ 1% F.S alarm point setting: oxygen: 18.0%; sulfur hexafluoride: 1000ppm. (settable)

3、Data response time: < 10s power consumption: < 10W  

4、Communication interface: RS485 or switching value (optional)  

5、Operating environment:        -20 ℃～ 60℃,10～95%RH  

6、 Insulation of working power supply: AC withstand voltage to ground > = 2000 V, insulation resistance > 2m Ω.   

7、Electromagnetic compatibility: fast transient pulse group GB / t14598.14-1999 Level 3 lightning (surge) GB / t17626.5-1999 Level 3  

8、External dimension: 23cm (L) × 20cm (W) × 4.5cm (H) 

9、 Installation method: wall hanging or bracket.