SF6 leak Monitoring System For GIS Air Tightness Test
Introduction
Power and T&D Industry is developing rapidly with more and more high-voltage and ultra-high-voltage switchgear used, and the demand of GIS is soaring with it. SF6 is widely used in GIS as a good insulation and interruption gas. The compartment tightness of GIS is very critical to its lifetime and the maintenance cost, and the leakage of SF6 will impact the safety and health of staffs and the global warming, too.
There are international and national standards Test Qm method to specify the tightness test of GIS, such as: GB50150-2006 Standard for hand-over test of electric equipment, GB/T 11023-2018 Test method of SF6 gas tightness for high-voltage switchgear , IEC62271-1 Common specifications for SF6-insulated and air insulated high voltage switchgear and control gear，CIGRE TB430 SF6 Tightness Guide, etc.
Our Solution
We offer an accurate, reliable and effective solution by combining the accumulation volume (buckle cover)method with highly sensitive Photoacoustic trace SF6 monitoring system.
Not only can it give the leakage amount and leakage rate in the accumulation volume, also it is a real time measuring system, which can judge if the tightness test is failed in short period of time. Compared with the portable sniffers, it reduces the workload incredibly and makes the tightness test in a more automatic and intelligent way.
The whole monitoring system is composed of Photoacoustice Trace SF6 gas analyzer, multipoint sampler, tubing and control software.
Upon request, we can also customize the solution to include air tightness test chamber and the buckle cover.
Features
l Photoacoustic Spectroscopy with Patented cantilever pressure sensor
l Low detection limit，high accuracy(ppb)
l Fast response time (3~10s)
l Easy to use（embedded APP）
l Multipoint sampler, extended 12 to 64 sampling point
l No pre-treatment, No consumables, No carrier gas
l Customize the tightness test chamber upon request
l Customize the buckle cover upon request
Application
l GIS manufacturing and quality control
l GIS installation and inspection
l GIS operation and maintenance
Specifications
SF6 Gas Monitoring |
Measurement range | 0.1 ppb-10 ppm |
Dynamic rate | 1:100000 |
Detection limit | 0.1 ppb |
Accuracy | 2% |
Response time | 3-10s |
Calibration | Factory calibration done before delivery |
Operation Environment |
Temperature | 0℃ ~ +45℃ |
Humidity | Below 90% RH, no condense |
Pressure | Ambient pressure |
Enclosure | IP20 (IEC 529) |
Vibration test | 33 Hz strong vibration |
Storage Environment |
Temperature | -20℃ ~ +60℃ |
Sampling Environment |
Temperature | 0 ~ +49℃ no condense |
Pressure | 930 mbar ~ 1100 mbar |
Humidity | Tdew +8 ℃ or higher |
Flow rate | 60 ml/min ~ 300 ml/min |
Particle | < 1 μm |
Dimension | 48.4cm Wx13.9cm Hx40.5cm D (19.1in Wx5.5in Hx16.0in D) |
Weight | Appx. 13 kg |
Connector | Specified quick plug for 3mm diameter tube，various plugs can be ordered upon request |
Electric parameter |
Power rating | 100 ~ 240VAC, 50 ~ 60 Hz |
Power consumption | 100W |
Interface | Ethernet、USB、AK |
The sampling points equipped with monitor, fine particle filter equipped |
Pump in-built, max. 100m sampling distance, PC embedded with 7" front display. |
Data storage appx. 2GB，up to 2-year data (@sampling continuously interval 15s） |
Data transfer via USB disk, USB port, Ethernet or Com port |
Compensate the interference from water vapor, particle automatically |
To work with multipoint sampler to extend to 12/24/32/64 channels |
Low adsorption SiO2 coated stainless steel valve set is used in multipoint sampler |
Working time for each channel can be defined 1~99min in multipoint sampler |
GIS tightness test chamber to be ordered upon request |
 GIS buckle cover to be ordered upon request
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