NDLI: Arc Flash Light Intensity Measurement System Design

Content Provider	IEEE Xplore Digital Library
Author	Wei-Jen Lee Zhenyuan Zhang Shiuan-Hau Rau Gammon, T. Johnson, B. Beyreis, J.
Copyright Year	1972
Abstract	Electrical arcs emit extremely high intensity light across a wide spectrum that can damage the eye's delicate structures, such as the cornea or the retina. Developing industry safety standards to mitigate light hazards is a critical component of arc flash safety. Accurate measurement of light intensity is the first step in understanding the level of eye protection needed. Traditionally, light measurement devices are an assembly of light-detecting resistors made from cadmium sulfide (CdS) or silicon (Si) cells. However, their response times are inadequate for capturing the peak light intensity or the dynamic changes during the initial arc flash. In addition, the brightness of an arc flash is greater than the measurable light levels from traditional light measurement devices. Furthermore, the light sensitivity of traditional sensors does not match the Commission Internationale de l'Éclairage luminosity function V(λ) curve, which defines the human eye's sensitivity to bright light as a function of wavelength under typical ambient light conditions. This paper discusses a novel light measurement technique to overcome the limitations of traditional approaches. This design is capable of measuring the light intensity of the arc flash as perceived by the human eyes. These results can be used to evaluate the potential of an arc flash to harm the eyes.
Sponsorship	IEEE Industry Applications Society
Starting Page	4267
Ending Page	4274
Page Count	8
File Size	1687983
File Format	PDF
ISSN	00939994
Volume Number	51
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arc discharges Sensor phenomena and characterization Sensitivity Optical filters Silicon Brightness operational amplifier light measurement arc flash ambient light sensor neutral density filter Ambient light sensor neutral density (ND) filter
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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