SF6 gas leakage online monitoring system

Product Overview
With the development of China's power system, indoor substations have been widely used in large and medium-sized cities. Due to the widespread use of SF6 circuit breakers in indoor substations, SF6 leakage is an inevitable problem. Excessive SF6 concentration in the air will endanger the personal safety of operators. To ensure the personal safety of substation operators, our company has developed an SF6 gas leakage online monitoring system. The SF6 gas leakage online monitoring system mainly consists of two parts: one is the detection system, which is used to collect the SF6 content, oxygen content, temperature, and humidity at various locations indoors, and send them to the host for processing; the other is the host processing system, which is used to collect the measurement values of the detection system, regularly save the measurement values to the database, and compare the measurement results with the set limit values. If a limit situation is found, an alarm signal will be issued and the control node connected to the fan will be controlled to start the fan for ventilation, avoiding danger to personnel.

System functions
● SF6 gas content detection function ● Temperature and humidity alarm function
● Oxygen content detection function ● When SF6 gas content exceeds the standard or lacks oxygen, the fan will automatically start the exhaust function
● Humidity and temperature detection function ● Timing and forced exhaust function
● SF6 gas content over limit alarm function ● Data saving and query function
● Hypoxia alarm function ● Data remote transmission function

System Features
Support power line carrier communication method, without the need to re install network chromium, greatly saving construction manpower and material resources.
Supports RS232, RS485, and Ethernet interfaces simultaneously, allowing for flexible construction of communication networks.
Suitable for SF6 switch rooms and combination electrical rooms (GIS rooms) with voltage levels of 500KV, 220KV, 110KV, 35KV, and 10kV.
◆ Adopting imported new high-sensitivity SF6 and oxygen sensors, equipped with auxiliary temperature and humidity sensors, fast, stable, and reliable.
Multi channel sensors, installed in multiple directions, ensure rapid, timely, and accurate alarm
Using an embedded industrial computer as the management unit, it has a user-friendly interface with a clear and simple structure, making it easy for staff to operate and query
Large capacity storage, solid-state recording format, meets customers' requirements for data storage capacity and storage time.

environmental conditions
★ Altitude: ≤ 5000m
★ Environmental temperature: -30 ℃~+60 ℃
★ Atmospheric pressure: 56~106kPa
Relative humidity: 5%~95%

Main technical indicators
● Input power supply: 185~265VAC ● SF6 alarm concentration: 50~1500PPM (identifiable)
● Response time: ≤ 10 seconds ● Temperature measurement range: -30~99 ℃
● Oxygen concentration measurement range: 1.0%~50.0% ● Humidity measurement range: 0~99%
Oxygen concentration measurement accuracy:<0.5%

Sensor Model Description

name	model	SF6 sensor	oxygen sensor	temperature sensor	humidity sensor
four-in-one	YX-SF6-01A	have	have	have	have
Three in one	YX-SF6-01B	have	have	have	none
2-in-1	YX-SF6-01C	have	have	none	none
Single SF6 probe	YX-SF6-01D	have	none	none	none

Typical design diagram of power line carrier