Fiber-coupled LED gas sensor and its application to online monitoring of ecoefficient dielectric insulation gases in high-voltage circuit breakers

Axel Kramer; Daniel Over; Patrick Stoller; Thomas A. Paul

doi:10.1364/AO.56.004505

Applied Optics
Vol. 56,
Issue 15,
pp. 4505-4512
(2017)
•https://doi.org/10.1364/AO.56.004505

Fiber-coupled LED gas sensor and its application to online monitoring of ecoefficient dielectric insulation gases in high-voltage circuit breakers

Axel Kramer, Daniel Over, Patrick Stoller, and Thomas A. Paul

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Axel Kramer, Daniel Over, Patrick Stoller, and Thomas A. Paul, "Fiber-coupled LED gas sensor and its application to online monitoring of ecoefficient dielectric insulation gases in high-voltage circuit breakers," Appl. Opt. 56, 4505-4512 (2017)

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Abstract

Novel dielectric insulation gases used as alternatives to sulfur hexafluoride in gas-insulated switchgear (GIS) include several mixtures containing fluorinated organic compounds. We developed a fiber-optic analyzer enabling concentration measurement of fluoroketones used in medium- and high-voltage switchgear applications by ABB, with concurrent compensation of disturbing effects caused by dust and dirt. The sensor enables measurements in GIS and even in operating high-voltage circuit breakers. The online availability of concentration readings of fluoroketones is important for development tests, but can also be applied for monitoring or diagnostics of field installations.

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$c$ [ppm] (Nominal)	$c$ [ppm] (Measured)	$Δ c / c$ [%] Relative Deviation
$20^{'} 000 \pm 200$	$20^{'} 100$	0.5
$20^{'} 000 \pm 200$	$19^{'} 970$	−0.14
$20^{'} 000 \pm 200$	$19^{'} 850$	−0.76
$20^{'} 000 \pm 200$	$20^{'} 010$	−0.06
$20^{'} 000 \pm 200$	$19^{'} 980$	−0.12
$35^{'} 100 \pm 350$	$34^{'} 800$	−0.85
$35^{'} 000 \pm 350$	$35^{'} 100$	0.29
$35^{'} 000 \pm 350$	$35^{'} 290$	0.83
$35^{'} 000 \pm 350$	$35^{'} 300$	0.85
$49^{'} 600 \pm 500$	$49^{'} 500$	−0.20
$50^{'} 000 \pm 500$	$49^{'} 700$	−0.52
$50^{'} 000 \pm 500$	$49^{'} 830$	−0.35
$50^{'} 000 \pm 500$	$49^{'} 900$	−0.19

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Applied Optics