Our company has developed an SF6 online micro water density detection system based on the current development trend of the power industry. This system is mainly used for online monitoring and control of SF6 gas in one of the main equipment in the power industry, the SF6 high-voltage circuit breaker. It can collect and display real-time data on the moisture content, density, and temperature of SF6 gas without emitting SF6 gas, transmit information remotely, fault alarm, lock mechanism startup, backend data display and analysis, etc., providing information and basis for power system production management and equipment status maintenance.

Functional features:

(1) Online monitoring of SF6 gas humidity, density, and temperature;

(2) Online monitoring of gas leakage and leakage alarm;

(3) Low voltage alarm and locking device can be automatically activated according to preset values or user specified values

(4) Reserve RS-485/CAN bus communication interface;

(5) Automatically draw a trend chart of state changes through backend software;

(6) Optional large screen LCD display for real-time data display on site, with screen protection and voice control display functions;

(7) Set alarm and locking threshold values and display methods for handheld remote controls;

(8) Fully sealed, anti-interference, suitable for outdoor and low-temperature environments.

Measurement parameters

Dew point range: -50...+20 ℃ Td/f

Pressure range: 0...+10bar

Temperature range: -40...+80 ℃

Calculate parameters

Convert to parameters under standard conditions of 20 ° C

Micro water value: 10... 20000ppm

Pressure value (density): 1 12 bar

SF6 mixed density: 0 100 kg/m3

The output parameters are:

PPM20 (micro water at 20 ℃), P20 (pressure at 20 ℃, density), T (℃), Td (dew point), P (pressure), Tdatm (atmospheric dew point), density (kg/m 3）

accuracy

Dew point accuracy: ± 3 ℃ Td

Pressure value (density) accuracy: ± 0.1% FS

Temperature accuracy: ± 1 ℃

Sensor response time:

Dew point sensor: 2S (20 ℃)

Pressure sensor:<0.5s>

Work environment

Transmitter operating temperature: -40...+80 ℃

Overload safety pressure: 20 bar

Relative humidity: 0-100RH%

Tested gas: SF6, SF6/N2 mixture

Output

Communication method: RS485

Communication protocol: ModBus RTU

Transmission speed: 9600bps