• Title, Summary, Keyword: street lamp

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The Analysis on the Electric Potential Distribution of Dry and Submerged Condition by Electric Leakage in Street Lamp (가로등설비 누전시 건조상태와 침수상태에 대한 전위분포 분석)

  • Hon, Sung-Ho;Park, Sang-Tea;Kim, Sang-Chul
    • Journal of the Korean Society of Safety
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    • v.23 no.6
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    • pp.44-50
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    • 2008
  • This paper presents study on the electric potential distribution when have a short in street lamp. In order to measure electric potential testing ground is built in. A experiment is conducted to simulate dry and submerged situation of street lamp. The street lamp is leaked by artificial means. And electric potential is measured in grounded street lamp and street lamp alone. The results show that touch voltage of grounded street lamp is possible more high than street lamp alone. And the electric shock hazard is high because high electric potential is distributed near submerged street lamp. Also if street lamp is submerged ground is not useful to decrease electric shock hazard.

The Experimental Study on the Electric Potential Distribution by Electric Leakage in Street Lamp (가로등설비 누전시 전위분포에 대한 실험연구)

  • Park, Sang-Tae;Lee, Bok-Young;Hong, Sung-Ho;Choi, Chung-Suk;Gil, Hyung-Jun;Han, Woon-Ki
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.222-227
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    • 2005
  • This paper presents study on the electric potential distribution when have a short in skeet lamp. In order to measure electric potential testing ground is built in. A experiment is conducted to simulate dry and submerged situation of street lamp. The street lamp is leaked by artificial means. And electric potential is measured in grounded street lamp and street lamp alone. The results show that touch voltage of grounded street lamp is possible to more high than street lamp alone. And the electric shock hazard is high because high electric potential is distributed near submerged street lamp. Also if street lamp is submerged ground is not useful to decrease electric shock hazard.

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Development of Selecting Equipment for Damage of Street Lamp Circuit (가로등 회로 손상 선별 장치 개발)

  • Cho, Hyun-Seob
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.5
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    • pp.2294-2297
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    • 2011
  • The research which sees currently inspects the damage of the street lamp circuit which is used selectively the diode for developed. Street lamp diagnosis is developed will grasp the lighting presence of LED indication systems and will be able to inspect selectively. The case where the street lamp will not light, will be able to indicate with the relationship of LED putting out lights where the breakdown should have occurred in which part. Circuit produced PCB borads and the system will be able to confirm the breakdown point location of street lamp individual grade developed.

Improve the Efficiency of Hybrid Solar LED Street Lamp Controller (하이브리드 태양광 LED 가로등 컨트롤러의 효율 개선)

  • Yun, Jung-Hyun;Kim, Jin-Sa
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.2
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    • pp.131-136
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    • 2015
  • We develop the 60 W class hybrid solar LED street lamp controller. The controller is providing power via an inverter in the day with the least solar cell and battery and charging the battery for the ESS, acts as a power failure, the built-in battery. Rated output of the fabricated LED street lamp is 300 W or greater battery capacity 300 Wh, discharge time 10 hr, LED street lamp efficiency showed a very high level of light efficiency by about 127 lm/W. In addition, as a result of light distribution pattern according to the distance and the light intensity measurement will be able to ensure a very high quality, show the constant brightness in the distance from the road lights 6 m is about 35~40 lux in uniformity ratio. The proposed hybrid solar LED street lamp system showed a high energy capacity of approximately 1.5 to 152.7% power generation efficiency than typical conventional solar street lamp.

Study on Thermal Pattern and Current Characteristics of an LED Street Lamp (LED 가로등의 발열 패턴 및 전류 특성에 관한 연구)

  • Kim, Hyang-Kon;Choi, Chung-Seog
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.58 no.3
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    • pp.357-361
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    • 2009
  • This study performed analysis on the thermal pattern and current characteristics of an LED ((Light Emitting Diode) street lamp. It did this using a TVS (Thermal Video System) to analyze the LED street lamp's thermal pattern, and measured its characteristics using an oscilloscope. The ambient temperature and humidity during the experiment were maintained at $24{\pm}2[^{\circ}C]$ and 50~60[%]. The capacity of the LED street lamp was 120[W] and nine sets of modules were arranged at uniform intervals. On one module, 24 LED lamps were arranged in a radial pattern. The analysis of the thermal diffusion pattern at the front of the LED lamp showed that the maximum surface temperature was approximately $34[^{\circ}C]$. In addition, there was almost no change in the temperature of the upper cover, and the temperature at the side showed a uniform thermal diffusion pattern. The surface temperature of the converter converting AC to DC increased to approximately $46[^{\circ}C]$. The analysis results of the thermal characteristics of one LED indicated uniform thermal characteristics for an initial eight minutes. However, the temperature at the center of the LED increased to approximately $82[^{\circ}C]$ after 12 minutes had elapsed. It can be seen from this that the temperature at the center of the LED was higher than the allowable temperature, $70[^{\circ}C]$ of the insulating material for general electrical devices. Therefore, it is necessary to design a lamp in such a way that the plastic insulating material does not come into contact with or get close to the LED lamp. The voltage of the LED lamp converted by the AC/DC converter was measured at DC 27[V] and the current was DC 13[A]. Consequently, it can be seen that in order to secure an adequate light source, it is important to supply a stable current that was greater than the current of other light sources. Therefore, appropriate radiation of heat is required to secure the stability and reliability of the system.

Development of Selecting Equipment for Damage of Street Lamp Circuit (가로등 회로 손상 선별 장치 개발)

  • Cho, Hyun-Seob;Oh, Myoung-Kwan
    • Proceedings of the KAIS Fall Conference
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    • pp.160-163
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    • 2008
  • This study developed selecting equipment for damage of street lamp circuit used by current transform and diode. To develop this system, current check used current transform and indication system used LED device. As faulted, current of street lamp circuit change with fault decivce. This chage of current detected and indicated by selecting equipment

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The Qualitative Analysis through the Investigation of the Field Condition at Street Lamps on the Main Street (주요간선 도로에 설치된 가로등의 현장실태조사를 통한 정성적 분석)

  • Choi, Chung-Seog;Kim, Hyang-Kon;Han, Woon-Ki
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.19 no.1
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    • pp.101-108
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    • 2005
  • When a heavy rain occurs, many electrical shock victims are produced every year because lamp poles are under water. In order to prevent electrical shock accidents at a street lamp, the investigation was carried out at real field conditions. The investigation was performed about the circuit configuration of a panel board, a wiring method, a grounding conductor, a lamp pole and so on. The related regulation was analyzed and the problems were presented. Also, the domestic and foreign things were compared and analyzed by the investigation of the field conditions, and the related standard was already revised. Through investigating the field conditions and analyzing the related regulation, it is intended to present the real data to establish more effective preventive measures against electrical shock accidents at a street lamp to be installed on the road. In the future, the analytical data can be applied to stabilize other electrical facilities on the road as well as a street lamp, and to reduce the electrical disasters.

Development of Remote Control and Monitoring System for HID Street-lamp Based on Low Cost Zigbee Communication Network (저 가격형 Zigbee 통신 네트워크 기반 HID 가로등의 원격 제어 및 감시 시스템 개발)

  • Chung, Wan-Sup;Kim, Yang-Bae;Shon, Jin-Geun
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.63 no.2
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    • pp.69-73
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    • 2014
  • In this paper, remote control and surveillance monitoring system of HID street-lamp using low-cost type of Zigbee communication module was developed. A plurality of capacitors with different capacity are attached to magnetic ballast for HID lamps. Changes in the amount of illumination can be adjusted by the changes in capacity so that the electric energy can be reduced. In Zigbee communication module, a ATmega128L microprocessor is used and in main CPU, ARM9 Core is used to construct a low-cost smart system. In surveillance monitoring systems, the system was configured to remote monitoring of presence of error in the lamp abnormalities, the status of leakage current and abnormalities of ballasts and capacitors and the validity of the proposed empirical experiment was confirmed.

A Study on Efficient Management of Solar Powered LED Street Lamp Using Weather forecast (기상예보를 이용한 태양광 LED 가로등의 효율적 운용에 관한 연구)

  • Pyo, Se-Young;Kwon, Oh-Seok;Kim, Kee-Hwan
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.15 no.2
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    • pp.129-135
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    • 2015
  • This study, in the operation of street lamp, suggests appropriate algorithm to extend the number of days of street lamp operation as much as possible if the number of sunless days continues and experimentally determines the value of Weather Factor necessary for this algorithm. This is conducted by reducing electricity consumption and securing battery remains through the use of standby power mode, in which maximum amount of light is maintained if there is a pedestrian, and constant brightness is maintained without utilizing maximum electric power if no pedestrians exist, with the application of WFactor value created by the algorithm considering weather forecast and amount of sunlight.

Characteristics of Street Lamp Controller with Earth Leakage Contactor (가로등 전용 누전 개폐기의 차단효과에 대한 고찰)

  • Lee, Seong-Jae;Shin, Jae-Sik
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.283-283
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    • 2010
  • Smart street light controller is a product with advance micro controller base for energy saving in conventional street lighting systems. Intelligent Street light controller are specially developed for automation and energy saving in conventional street light systems and lighting systems. It is so designed that it operates on sunrise & sun set timings according to longitude of particular location with facilitate to set month wise civil twilight timings to cope up with all seasons. Dimming (Power down) mode selection switch on/off at fixed times with relay or contactor. Night dimming, staggering and intelligent control reduces burn hours and increases the lifetime of lamps with about 30% and low annual operating cost type base are among the most inexpensive wireless technologies available. Low initial costs As PLC wireless, there is no need to establish cable connection.

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