Development Of SF6Gas Humidity On-line Monitoring Device

With the wide use of GIS equipment, SF6gas humidity detection as an important project of GIS test equipment has been widely attention, but the current detection methods can not meet the need of on-site maintenance, according to the characteristics of SF6gas humidity measurement in practical work, the development of SF6gas humidity on-line detecting instrument. This paper introduces the on-line gas humidity detector host and sensor selection, software development and online moisture detection instrument installation, test and use. The device and the existing off-line micro data of water detector compared to display, the device has the advantages of good accuracy, anti-interference performance and economy, into the practical application of the scene after scene, improve work efficiency, ensure the safety of equipment operation, effectively help the maintenance personnel found analysis problems in a timely manner, and reduces the to reduce the maintenance cost of interruption times of.SF6circuit breakers monitor online system uses the PIC16F877microcontroller as a processor, to achieve real-time monitoring of SF6gas’s temperature, humidity and pressure, and to kown the running state of circuit breakers so that people could effectively deal with the insulation fault caused by SF6gas itself, and ensure the safty of the power supply system.In this design,the basic principles of SF6circuit breaker can be summarized as that the humidity sensor, temperature sensor and pressure sensor are connected to the SF6gas room by the jointer,which can survey the humidity, temperature, pressure of SF6gas. The measured analog go through the A/D conversion, data analysis in the PIC16F877microcontroller, to implement data overrun alarm and demonstrate temperature, pressure and humidity.The information transmission between slaves and the master generates a standard communication packets based on MODBUS protocol to achieve real-time control.