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http://dx.doi.org/10.4313/JKEM.2014.27.11.690

Characteristic Analysis of a Ex Circuit of Ex LED Signal Lamp Operating with AC/DC 12~254 V  

Jeong, Min-Joo (LED Convergence Engineering, Specialized Graduate School Science and Technology Convergence Pukyong National University)
Her, In-Sung (LED Convergence Engineering, Specialized Graduate School Science and Technology Convergence Pukyong National University)
Kang, In-Cheol (ELSCOM, Inc.)
Yu, Young-Moon (LED Convergence Engineering, Specialized Graduate School Science and Technology Convergence Pukyong National University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.27, no.11, 2014 , pp. 690-695 More about this Journal
Abstract
In this paper, we develop a explosion-proof LED lighting (Ex circuit) circuit of Explosion-proof LED Signal Lamp (Ex LSL) to utilize the core module of the explosion-proof Local Control System (Ex LCS) for offshore plant applications. And then analyzed its electrical, optical and thermal characteristics. Ex circuit was applied input voltage from AC/DC(12~254) V. In this experiments, stable light-on characteristics were confirmed by eyes for the every input voltages with min. 78,462 and max. $517,975cd/m^2$ of luminance. also Output current and output luminance was made proportional. Because the measured maximum surface temperature of Ex circuit was $54.23^{\circ}C$ at AC 48 V, Ex circuit was rated with T6 of temperature class. Finally, Ex circuit was shown stable light on characteristics under the $-50^{\circ}C$ and $60^{\circ}C$ during 12 hours of test period.
Keywords
Explosion-proof; LED circuit; Ex LED signal lamp; Class of temperature;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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