The KDXJ-10 SF6 gas concentration online monitoring and alarm system adopts the principle of sound velocity, which can measure SF6 concentration in real time and quantitatively. Even when the SF6 concentration is at 50ppm, it can effectively detect it. Not only can it achieve the goal of ensuring personal safety, but it can also ensure the normal operation of equipment.

The KDXJ-10 SF6 gas concentration online monitoring and alarm system can monitor up to 32 monitoring points in the environment, and can also use multiple main control units for network control and communication with the power station automation system. Effective monitoring of indoor SF6 concentration and O2 concentration greatly improves the safety of unmanned substation operation, especially providing reliable protection for the personal safety of daily inspection and maintenance personnel.

The KDXJ-10 SF6 gas concentration online monitoring and alarm system is divided into three modules: (1) gas sampling module, which mainly completes the function of sampling gas at each measurement point; (2) Gas analysis module, mainly responsible for SF6 quantitative analysis, O2 quantitative analysis, and temperature and humidity measurement functions; (3) The host and auxiliary function modules mainly complete the coordination work of various modules, including display, alarm, and fan startup functions.

● Monitoring and display function for oxygen content in the environment;
● SF6 gas content monitoring and display function in the environment;
● Temperature and humidity monitoring display function in the environment;
● Oxygen deficiency alarm function;
SF6 gas content exceeding the standard alarm function;
● Timed exhaust function;
● Oxygen deficiency or excessive SF6 content, forced exhaust function;
● Manual forced exhaust function;
Last exhaust display function;
Real time display of various parameter functions;
● Historical data query function;
● Support remote telemetry and signaling of remote control systems;
● Daily automatic zero calibration function, automatically overcoming drift and false alarms;
The inspection interval can be adjusted by the user. Automatic enhanced tracking function for suspicious detection points;
When an alarm occurs, the fan will automatically turn on and the sound and light alarm will sound;
Users can adjust the alarm parameters of SF6 and O2;
● SF6 and O2 content curve analysis function;
● Support RTU telemetry and remote signaling function;
● Data reporting function;
● Historical data query function;
● Infrared detection prompt function;
● Optional wireless alarm function;
● Massive alarm data recording and storage function, designed with a long lifespan;
● Large color screen touch display, user-friendly operation interface;
By increasing the limited cost, the detection points can be doubled and the detection density can be increased;
● Wide working power supply design with 185-250VAC, anti wave and lightning protection functions;
● Human body sensing, automatically start the fan or voice system;
The display is relatively stable, effectively solving the problem of data drift;
● Can choose to connect with the upper computer to achieve remote monitoring, and record events and historical events;
● Optional monitoring of toxic gas content (such as CO, CH4, H2S);
● Optional external input signal interface, input signals can come from smoke probes, door magnetic switches, etc;
Optional output interface, realizing numerous intelligent control functions such as automatic fire alarm, start/stop dehumidifier, electric control door, etc;
● Optional digital SF6 density relay combined with networking to form SF6 gas leakage monitoring system;
● Optional remote network for monitoring system operation status, directly controlling the operation of the host or transmitter;

1. System host

The host of KDXJ-10 SF6 gas concentration online monitoring and alarm system receives the data transmitted by the collector, synchronously displays it, analyzes and processes it, and makes a judgment after comparing it with fixed standard parameters. At the same time, the host can communicate with the upper PC, receive control commands from the PC, or upload data to the PC for telemetry, remote control, and storage. When the collected data exceeds the set limit, the host automatically runs various control programs and starts peripheral devices to work, including sound and light, voice alarm, ventilation, etc. In addition, the host can measure the temperature and humidity of the environment on its own in order to compensate and correct relevant data.

Installation method: wall mounted or cabinet mounted

Maximum number of collector connections: 50 (can be adjusted according to user needs)

Dimensions: 800 × 600 × 2000 (mm)

Alarm output mode: normally open contact (passive), RS485 communication

★ Host size: 280mm × 327mm × 76mm

★ SF6 concentration detection range: 0-30000ppm

SF6 gas detection sensitivity: ± 5% set value

★ Oxygen concentration detection range: 0-25%

★ Oxygen measurement accuracy:<0.5% (0.4%, O2 at 21%)

★ Hypoxia alarm threshold: 18.0% (adjustable)

★ Temperature display range: -20~99 ℃

★ Humidity display range: 0-99% RH

★ Testing points: Standard configuration with 12 points; Maximum quantity: 50 pieces (can be adjusted according to user needs).

★ Data recording function: automatic recording of alarm events, massive storage, and automatic updates.

★ Alarm output: Relay air contact output, can be connected to RTU, and supports RS485 alarm output.

★ Support RTU remote start fan function.

★ Support infrared human detection technology, automatically start the fan or provide voice prompts.

★ Fan controller: switch type: directly controls the fan power supply; Pulse type: connected to the fan control switch. Optional according to on-site conditions.

★ The fan startup supports multiple modes: timed startup, alarm startup, automatic startup when someone is present, remote startup, manual startup, etc.