Wireless remote SF6 gas density relay

Product description

Wireless remote SF6 gas density relay (WINFOSS-D6XR) is mainly used to monitor the density of SF6 gas in sealed containers. It is mostly used in high-voltage electrical equipment with SF6 gas as the insulating medium, and is suitable for outdoor working environments. The density relay has two or three groups of contacts (defined according to different needs), which can send out alarm and lock control signals, and have indication display. SF6 gas density relay can be filled with silicone oil to improve shock and shock resistance. With the development of unattended substations in the direction of networking and digitization and the requirements for telemetry and remote signaling, it is of great practical significance to realize online monitoring of SF6 gas density in substations with Internet of Things technology.

The SF6 gas density relay of the wireless remote transmission SF6 gas density relay (WINFOSS-D6XR) sends the collected data monitoring data to the on-site monitoring unit through wired 4-20mA or RS485; the on-site monitoring unit uses the wireless LORA network to transfer the collected SF6 density meter The data is uploaded to the main control unit. The main control unit stores, displays and processes the received data; when the high-voltage electrical equipment leaks SF6 gas, the data processing server can immediately indicate the pressure or density changes caused by the leak, and give an early warning signal to prompt maintenance personnel to perform system maintenance. The historical measurement data of SF6 density stored on the main control unit can be queried by the staff and the remote management system.

During normal operation, the system can monitor and record the status of the GIS online at any time, and use the diagnostic system to analyze and judge the running status of the equipment. When the GIS is abnormal, the system quickly collects and processes the fault data, and at the same time completes the functions of online calculation, storage, statistics, alarm, analysis report and data remote transmission.

System functions

01. Real-time online monitoring of SF6 gas pressure and density in SF6 high-pressure equipment.

02. SF6 gas leakage alarm and blocking function in SF6 high pressure switch.

03. The on-site monitoring unit adopts RS485 bus communication, collects the data of each SF6 meter, and uploads the monitoring data to the monitoring center in real time through the LORA wireless network.

04. The system can be configured with an IED device to convert the collected digital information into IEC61850 protocols and upload them.

05. The system can sample and store data according to the set time frequency (can be stored for more than 10 years).

06. The system automatically draws the trend graph of SF6 gas density.

Technical parameter

01. Working voltage: DC24V;

02. Contact capacity: 250VAC/3A, 250VDC/0.2A;

03. Detection range: 0～1.0Mpa;

04. Pressure accuracy: Class 1.5 (at 20℃, mechanical part); Class 0.25 (electronic part);

05. Temperature accuracy: ±0.5℃;

06. Number of nodes: can output three pairs of point signals (alarm, block 1, block 2);

07. Communication method: RS485 two-wire system (RS422, 4～20mA can be customized);

08. Transmission distance: 1200 meters (the transmission distance can be extended through the repeater);

09. Transmission rate: 9600bps; 10. Working environment: temperature is -40℃～+60℃, relative humidity ≤95%RH;

11. Sealing performance: ≤1×10-8mbar.l/s (helium leak detection);

12. Product outer diameter: 100mm;

13. Installation method: radial or axial;

14. Withstand voltage: 2KV, 50Hz.

Features

01. The instruction and control are traditional mechanical structures, and electronic chips are used for signal acquisition and remote transmission.

02. RS-485 bus interface, the system is easy to expand, and it is convenient to realize the functions of telemetry and remote signaling.

03. Special 10-core junction box, convenient and beautiful for wiring.

04. Long transmission distance and simple wiring.

05. Strong anti-electromagnetic interference ability.

06. Adopt imported pressure sensor and temperature sensor.

07. The sealing performance is good, the helium mass spectrometer is strictly tested for sealing, and the leak rate is less than ≤1×10-8mbar.1/s.

08. The mechanical temperature sensing element adopts imported materials, with a large temperature compensation range, high precision, stable and reliable performance.

09. The SF6 pressure value after output temperature compensation can directly reflect the change of SF6 density.

10. The red, yellow and green blocks of the dial indicate different working areas and are not affected by changes in ambient temperature.

11. Safe to use, easy to maintain, and flexible to install.

12. System transformation or system matching can be carried out for the running or newly built substations and GIS stations.

Station control platform

The wireless remote transmission SF6 gas density relay (WINFOSS-D6XR) adopts the RS485-Modbus communication protocol. Each monitoring terminal with the same monitoring function assigns an independent identification code to each device through the self-defined communication protocol, and transmits it to the equipment through the RS485 signal. Protocol converter, set up an independent system server, and transmit it to the station control layer through the IEC61850 protocol converter via Ethernet.

(1) Communication software: It mainly interacts with the on-site acquisition unit, uploads the data collected by the on-site acquisition unit to the system in real time, and saves it to the data at the same time;

(2) Management software: realize the data display, query, alarm, log, printing and other functions of the collected SF6 instrument. The whole software has complete functions, the expansion of software function modules is standardized, and the system has good function expansibility and scale scalability; the user interface is friendly and vivid, and the operation is convenient.