Basic Info.
Product Description
General information
The quantitative leak alarm system is mainly used in the 35KV SF6 switch room and 500KV, 220KV, 110KV GIS room in the substation to monitor the SF6 gas leakage in the environment of the SF6 combined electrical equipment room and the oxygen content in the air in real time.
When SF6 gas leaks, the density of SF6 gas is more than 5 times that of air, which accumulates in the lower space and causes local oxygen deficiency, causing major accidents. The system uses multiple sets of new high-sensitivity imported SF6-O2 sensors, temperature sensors and humidity sensors. When the indoor SF6 and O2 concentrations change slightly, the sensors can respond to these changes immediately, even if the SF6 concentration is 10ppmv can be effectively monitored. The concentration change monitored by the sensor is converted into a 485 communication digital signal by the transmitter, A/D module, 485 communication module and single-chip microcomputer, and the signal is sent to the main controller through the on-site RS-485 bus, and the main controller performs data process and store, and judge whether to alarm.
Standards
DL/T 639-2016 Safety and protection guide for operation, test and maintenance personnel of SF6 electrical equipment
GB/T 8905-2012 The guide for management and measuring SF6 gas in electrical equipment
( IEC 60376 'Specification and Acceptance of New Sulfur Hexafluoride'
IEC 60480 'Guidelines for the checking and treatment of sulfur hexafluoride (SF6) taken from electrical equipment and specification for its re-use')
GB/T 17626 Electromagnetic compatibility-Testing and measurement techniques
(IEC 61000-4 Electromagnetic compatibility (EMC) part 4 Testing and measurement techniques)
GB/T 2423 Environment testing for Electric and electronic products
(IEC 60068 Environment testing )
DL/T596-2018 Preventive test code for electric power equipment
GB/T 18867-2014 Gases for electronic industry-Sulphur hexafluoride
DL506 Method of humidity measurement of SF6 insulated gas in electrical equipment
JJG 499-2004 Precision Dew-Point Hygrometers
Application range:
Indoor GIS environmental monitoring
Environmental monitoring of indoor SF6 switchgear room
SF6 high purity gas manufacturing
R & D purpose
Features
1. The sensor configuration of the test terminal is flexible, and infrared sensors, electrochemical sensors, and ultrasonic sensors are optional. According to different scenes, it can be selectively adapted and more flexible.
2.10.1-inch touch color display, user communication is convenient.
3. Industrial-grade ARM motherboard, supporting excellent OS software system, makes the product more reliable.
4. Intelligent judgment algorithm can remove sensor false alarm caused by various reasons.
5. Intelligent zero drift calibration extends the service life of the sensor.
6. Human body automatic monitoring function, when the person reaches the entrance of the monitored environment, the host automatically detects the human body signal. Start the host immediately and report monitoring environmental data.
7. The alarm data and the ventilation program are self-set, and the user can set the corresponding alarm data according to the regulations.
8. Anti-electromagnetic interference circuit design to ensure product reliability.
It can expand USB communication, serial communication, and wireless communication modules, and can realize the communication and printing functions of the host computer. (Optional)
Specifications
- Function
- Monitor and display the oxygen content in the environment.
- SF6 gas content monitoring and display function in the environment.
- Temperature and humidity monitoring and display function in the environment.
- Hypoxia alarm function.
- SF6 gas content exceeds the alarm function.
- Regular exhaust function.
- Hypoxia or SF6 content exceeds the standard, forced exhaust function.
- Manual forced exhaust function.
- Last exhaust air display function.
- Real-time display of various parameter functions.
- Historical data query function.
- Support telemetry and telemetry in telecontrol system.
- The unique daily automatic zero calibration function automatically overcomes drift and false alarms.
- The inspection interval is user adjustable. Suspicious detection points automatically strengthen the tracking function.
- When an alarm occurs, the fan and sound and light alarms are automatically turned on.
- User can adjust the alarm parameters of SF6 and O2
- Support RTU telemetry and telesignal function.
- Mass alarm data record storage function, long life design
- Large color LCD display, user-friendly operation interface.
- As long as the limited cost is increased, the detection point can be doubled to increase the detection density.
- Wide working power 185~50VAC, anti-wave surging and lightning strike function.
- Human body induction, automatically start the fan or voice system
- The display is relatively stable, which solves the problem of data drift well.
- You can choose to connect with the host computer to realize remote monitoring, and record events and historical events.
- Technical parameters
Main unit dimension | 400*300*200mm |
SF6 gas density detection range | 0 ~ 1500ppm |
SF6 gas detection sensitivity | ±5% setting value |
Detection range of oxygen concentration | 0~25% |
Oxygen measurement accuracy | <0.5% (0.4%, O2 at 21%) |
Hypoxia alarm threshold | 18.0% (adjustable) |
Temperature display range | -20~99 ºC |
Humidity display range | 0~99%RH |
Detection point | Configure according to the actual situation on site |
Data recording function
| Automatic recording of alarm events, mass storage, and automatic update. |
Alarm output | Relay idle contact output, can be connected with RTU, and supports RS485 alarm output. |
Support RTU remote start fan function. | |
Infrared human body detection technology, automatically start the fan or voice prompt. | |
Fan controller | Switch type: directly control the fan power supply; |
Fan start supports multiple modes | Timing start, alarm start, automatic start when there is someone, remote start, manual start, etc. |
Various forms of host | Wall-mounted explosion-proof / 3U / 19-inch standard case; 10-inch touch Android style interface. |
Support the remote transmission of measurement data via RS485: | For example, install a large LED display at the door, and immediately see the measurement parameters and system operation in the distance. (Requires additional selection by the user) |
