Sulfur fluoride (SF6) gas is a colorless, odorless, non-toxic inert gas, but under the action of high voltage arc, this gas will decompose, encounter water will also produce some highly toxic substances. At present, SF6 gas is widely used in medium and high pressure equipment, and its safety has been widely concerned by people. The relevant national departments have formulated a series of corresponding industry safety laws and regulations, which clearly stipulate that the personnel should be ventilated for 15 minutes when entering the SF6 power distribution device room, and the oxygen meter and SF6 gas alarm should be installed in the low area of the SF6 power distribution device.

The BW-5000 SF6 leakage quantitative alarm system produced by our company adopts the principle of ultrasonic detection of SF6 gas, which has the advantages of wide range, fast response speed, long life and low false alarm rate. The device uses advanced Cortex-M3 hardware platform, processing power, fast operation. The host machine adopts the 5.7-inch large screen of true color touch screen, rich intuitive display, reasonable setting function. The micro detection technology can detect the concentration of SF6 and 02 gas in the environment online in real time. Once abnormal gas is found, it will automatically alarm, start the ventilation facilities, and indicate the location of abnormal gas points, timely notify the evacuation of personnel in the dangerous location, and ensure the safety of operators to a greater extent.

System connection and installation

● System host: screen cabinet or wall hanging type. - Generally installed on the special screen cabinet in the main control room or at the door of the switch room, the height is convenient to observe the display window and easy to operate, connected with AC220V power supply and communication cable and fan control output.

● SF6-O2 gas collector is generally arranged according to the distribution of the gas chamber, and is installed on the channel steel or ground 0-10cm away from the ground, so that it can ensure timely monitoring of the site environment, and does not waste equipment resources.

● All data connection lines should be shielded cable.

Selection description

Product characteristics

● Adopt international advanced ultrasonic detection SF6 principle, with wide range, fast response speed, long life, low false alarm rate advantages.

● The host machine adopts 5.7 inch large true color touch screen, rich intuitive display.

● The device is equipped with high resolution human body infrared probe and human voice alarm, which can detect personnel activities in real time and automatically voice alarm.

● A single host up to 40 points at the same time monitoring, multiple host combination can be unlimited expansion, to meet the needs of the field environment.

● SF6 sensor adopts imported ultrasonic probe, oxygen sensor adopts high quality oxygen cell, wide test range, stable, sensitive and reliable.

● Device alarm node adopts high-power relay, up to AC220V/8A; In addition, the device also has power failure alarm function, which can detect the power failure of the device in real time.

● System communication using standard Modbus-RTU communication protocol, the system can easily access the integrated self-monitoring system or other systems.

● Maintenance-free design of the whole machine without adjusting devices, high-quality components selection, excellent anti-interference performance.

Device parameters

● Working environment: temperature: -10~ +50C; Humidity <95%, altitude below 2000m

● Power supply: AC220V

● Power consumption: host ≤ 15W; Sensor 2 w or less

● Rated alarm value: SF6: 1000ppm, 02: 18%;

● Alarm output contact power: AC220V/8A;

● SF6 measurement range: 0-30000ppm; 02 Measurement range: 0- 35%;

● Three modes of fan starting:

1. Automatic ventilation when SF6 leakage or 02 content is low

2.automatic timing exhaust

3.manual forced exhaust

● Temperature display range: -20C ~ 70C;

● Humidity display range: 0-99% RH