专注于SF6气体检测的专业化
When does the SF6 leak monitoring and alarm system need to be installed in the high voltage switch room of electrical equipment?
Basis: GB/T8905-1996 "Guidelines for Gas Management and Detection in sulfur hexafluoride Electrical Equipment" and DL 408-1991 "Safety Work Regulations for Electrical Industry" (electrical parts of power plants and substations) and "Eighteen Major Anti-accident Measures for Power Grids of the State Grid Corporation" special provisions, The distribution unit room equipped with SF6 equipment must ensure that the SF6 gas concentration is less than 1000ppm, in addition to the installation of strong ventilation devices, must be installed with alarm oxygen meter and SF6 gas concentration detection and alarm meter.
Industry safety regulations:
Enter the engineering installation site, strictly follow the safety regulations of electric power operation. The person in charge shall explain the site safety measures, work content and safety precautions in detail to the construction personnel. The construction personnel shall obey the command of the guardian and the person in charge of the work. The guardianship personnel shall supervise and inspect the safety of the whole project, and stop the behaviors that violate the safety regulations. Those who do not listen to the advice shall be ordered to leave the work site.
Article 191 Power distribution rooms and SF6 gas laboratories equipped with SF6 equipment must be equipped with powerful ventilation devices. The air outlet should be set at the bottom of the room.
Article 192 In the room, when the equipment is filled with SF6 gas, the relative humidity of the surrounding environment should be less than 80%, and the ventilation system must be turned on to avoid SF6 gas leaking into the work area. The SF6 gas content in the working area air shall not exceed 1000ppm.
Article 196 The staff entering the SF6 distribution unit room must first ventilate for 15min, and measure the SF6 gas content with a leak detector, try to avoid one person entering the SF6 distribution unit room for inspection, and no one is allowed to enter the maintenance work.
Article 198 Entering the SF6 power distribution unit room low area or cable trench work should first test whether the oxygen content is qualified.
Article 199 An oxygen meter and an SF6 gas leak alarm meter shall be installed in the low area of the SF6 distribution unit. These instruments should be tested regularly to ensure their good condition.
Article 203 In the event of an emergency, all ventilation systems should be opened immediately for ventilation. In the event of a rupture of the explosion-proof film of the equipment, power should be cut off and the equipment should be wiped clean with gasoline or acetone.
System function
Status monitoring
SF6 concentration and oxygen content monitoring: Real-time monitoring of SF6 concentration and oxygen content in the switching station environment 24 hours a day, 365 days, the system host and the computer in the monitoring room display the monitoring results synchronously.
l Temperature and humidity online monitoring: 365 days 24 hours real-time monitoring and dynamic display of the current switch station ambient temperature and humidity values.
Real-time monitoring of system operating status: real-time monitoring of the communication status of each monitoring unit in the system, and synchronous display of monitoring results on the interface of the system host and monitoring station.
l Automatic voice prompt: When the staff is near the entrance of the switch station, the system automatically prompts the environment safety status in Mandarin to remind the staff whether they can safely enter the switch room, and the voice volume is adjustable.
Sound and light alarm: When the SF6 concentration exceeds the standard or hypoxia is detected, the system prompts the on-site personnel to deal with it in time with high frequency whistle and warning light alarm.
Fan running status indicator: shows the current fan running status, if in the stopped state, it shows the latest fan start/stop time, which is convenient to judge whether forced ventilation is required before entering the switch room.
Safety control
Fan linkage control: When the SF6 concentration is detected in real time to exceed 1000ppm or hypoxia is less than 19.6%, the fan ventilation will be automatically controlled until SF6 and oxygen concentration return to normal, and the fan will be automatically shut down after continuous ventilation for 10 minutes.
l Fan timing control: customized period ventilation (up to 24 periods), to ensure that the switch room can be ventilated on time every day. Ventilation start/stop time can be set flexibly. It can meet the various exhaust requirements of users.
Remote alarm: Provide the form of hard contact to support the connection with the remote device to achieve remote alarm in the main control room or dispatch center.
Data processing
l Monitoring data storage: environmental status abnormal data storage, monitoring historical data mass storage capacity to meet more than 10 years of operation requirements.
Historical data query: Historical data of any time period can be queried and managed in the host menu or the computer in the main control room.
l System self-healing, self-recovery: independent, dedicated fault self-detection, self-healing module in the system program error can be self-guided, self-recovery.
Full touch operation function: Full touch operation mode, the system can locate the selection information input according to the finger touch icon or menu position, which shortens the reaction time of the system and saves the user's waiting time; At the same time, the system is more convenient to operate, and the appearance is simple and beautiful.