Overview
SF6 gas-insulated switchgear (GIS) offers excellent insulation performance, yet insulation faults can still occur during operation. Partial discharges such as corona, sparks, and arcs cause SF6 to decompose and react with moisture and insulating materials, generating characteristic by-products. Analysis of these decomposition gases enables fault diagnosis and early detection of insulation defects.
Principle
The LT 703 Series uses infrared photoacoustic spectroscopy to analyze SF6 decomposition gases in oil. A pulsed infrared light source and 9 narrowband mid-infrared channels enable simultaneous multi-gas detection. Ultra-high sensitivity is achieved with a patented cantilever optical microphone and ultra-narrow optical filtering, minimizing cross-interference and ensuring accurate measurements.
Features
l No consumables, maintenance-free, non-chemical, non-chromatographic
l Constant temperature and pressure measurement chamber, single-point calibration, wide dynamic range
l Configurable response time, from 5 seconds to 3 minutes
l Simultaneous multi-gas measurement with a high cost-performance ratio
Technical Parameters
Measurement Range | |||
Gases | Lower Limit/ppm | Upper Limit/ppm | |
SO2 | 0.1 | 10000 | |
CO2 | 1 | 50000 | |
CF4 | 0.1 | 10000 | |
CS2 | 0.1 | 10000 | |
CO | 0.5 | 10000 | |
H2S | 5 | 500000 | |
HF | 0.1 | 10000 | |
SO2F2 | 0.1 | 10000 | |
H2O | 0% | 100% | |
Physical and Mechanical Specifications | |||
Operating Environmental Temperature | +5~+50℃ | ||
Operating Sample Temperature | 0~+45℃ | ||
Storage Temperature | -30℃~+80℃ | ||
Humidity | 90%(non-condensing at 30℃) | ||
Vibration Resistance | IEC 60068-2-6, Fc test | ||
Drop/lmpact Resistance | IEC 60068-2-31 and ISTA1A | ||
Power Supply | 90~250VAC,47~63Hz | ||
Weight | ＜5kg | ||
Dimensions | 15.2 cm W×10.5 cm H×34.9 cm D | ||
Chamber Volume | ＜30ml | ||
Zero Drift | ±detection limit/1 month | ||
Repeatability | 2% under reference | ||
Range Drift | 5% per 12 months | ||
Accuracy | ±2% or ±0.1 ppm (whichever is greater) | ||
RH Accuracy | ±1%RH(H2O 0~90%RH) | ||
Communication Interface | USB (open communication protocol) | ||
Applications
l GIS production and research units
l SF6 production and research units
l High-purity gas production and research units
l Air chemical industry
l Power transmission and distribution units
l Universities and research institutions
Company：
Lightwaves
Tel：
+31611264230
Address：
Bolderweg 1, 1332 AX Almere, The Netherlands
Email：
infor@lightwaves.nl
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