• 반도체디스플레이기술학회지
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• 제17권3호
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• pp.104-107
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• 2018

In this paper, we developed a sensor for monitoring the leakage current through the chassis of the robot. The leakage current sensor needs to be developed because it is a necessary part to prevent electric shock accidents that may occur through the chassis of a robot or an electric vehicle. This leakage monitoring sensor was developed to be mounted directly on the chassis of the robot. This sensor protects the control system from noise by discharging static and high-frequency noise that may occur in the chassis of the robot and monitors the leakage current by measuring the amount of current discharged through the ground. In this paper, a leakage monitoring sensor was developed with a simple structure using resistors, capacitors and OP-AMP, and the performance was evaluated.

• 조명전기설비학회논문지
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• 제27권9호
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• pp.90-99
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• 2013

To analyze the effectiveness of the resistive leakage current monitoring as a technology preventing electrical accidents, in this paper, we have estimated the phase of the body impedance by using the body impedance model and the body impedance data from IEC. We also have analyzed the phase of the electric body current in the case of 60Hz/220V. From these results, we concluded that deliberate researches about the phase of the electrical body current and related regulations must be carried out before the resistive leakage current monitoring unit is used to protect electric shock. And we concluded that the resistive leakage current monitoring unit can be utilized to prevent electrical fires caused by electric leakage current without unwanted circuit break due to capacitive leakage current flowing from line filter capacitors to the earth.

• 전기학회논문지P
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• 제57권4호
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• pp.349-355
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• 2008

In this paper, a wireless remote monitoring system for leakage current of distribution board is developed. In the developed system, signals of the leakage current of distribution board are transmitted to a monitoring system using wireless communication. The developed system is consisted of a comparative module, control module, a wireless communication module, and hand held terminal. The developed system has any facilities which can check a leakage current with real time, send to the user this fact using a wireless remote interface method. And also developed system can take precaution for an accident by leakage current.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1999년도 추계학술대회 논문집
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• pp.501-504
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• 1999

The polymer insulators which are installed on outdoor have a great advantage than porcelain and 71ass, due to suppression of leakage current, light weight, low cost, etc. It needs variable evaluation methods for application of these insulators on service. The analysis of measuring leakage current is useful for ageing diagnosis because of monitoring in real-time. In this paper, we look over the recovery of hydrophobicity of silicone rubber in mini salt-fog chamber with leakage current monitoring. also, we understand the relation of between hydrophobicity and leakage current and discuss on method of leakage current monitoring.

• KIEE International Transactions on Electrophysics and Applications
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• 제5C권3호
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• pp.131-137
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• 2005

This paper describes a new approach to the algorithm and fundamental characteristics of the device for monitoring the leakage currents flowing through zinc oxide (ZnO) surge arresters. In order to obtain a technique for a new on-line monitoring device that can be used in the deterioration diagnosis of ZnO surge arresters, the new algorithm and on-line leakage current detection device for extracting the resistive and capacitive currents using the phase shift addition method were proposed. The computer-based on-line monitoring device can sense accurately the power frequency leakage currents flowing through ZnO surge arresters. The on-line leakage current monitoring device of ZnO surge arresters proposed in this work has the high sensitivity compared to the third harmonic leakage current detection devices. As a consequence, it was found that the proposed leakage current monitoring device would be useful for forecasting the defects and degradation of ZnO surge arresters.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.360-363
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• 2009

변압기 누설전류 통합 감시 장치는 변압기 중성선에 흐르는 누설전류를 검출하여 실시간으로 모니터링이 가능한 장치로, 지정 값 이상의 누설전류가 검출되면 관리자에게 경보함으로써 전기적인 사고를 사전에 예방할 수 있다. 본 논문에서는 변압기 누설전류 통합 감시장치에 대해 설명하고, 국내 현재 설비상황 및 실제 사고 사례를 통해 변압기 누설전류 통합 강시장치의 필요성에 대해 설명하였다.

• 전기학회논문지P
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• 제58권4호
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• pp.377-384
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• 2009

In this paper, leakage current sensing module of SoC(System on Chip)type and real time monitoring system under consideration of electromagnetic interface in power trunk line are developed. The first, leakage current sensing module of SoC type under consideration of electromagnetic interface is developed, and the developed sensing module of SoC type is composed of leakage sensing part, power supply part, interface part, communication part, AD(Alternating current to Direct current)convert part and amplification part. And also the electromagnetic compatibility is evaluated by conduction and radiation of EMI(Electromagnetic Interference) for developed sensing module. The developed system can have confidence, stability and do energy saving under mixed electric circumstance of the low voltage communication device and high voltage equipment. The second, the real time remote monitoring system is developed using designed wire and wireless communication module with leakage current sensing module of SoC type. The developed real time remote monitoring system can monitor sensing state, occurrence state of leakage current and alarm for each step etc.. And the device configuration, PCB layout for leakage current sensing module of system on chip type and the experiment configuration in consideration of EMI are presented. Also the measurement results of conduction and radiation for EMI are presented.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 추계학술대회 논문집
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• pp.51-54
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• 2009

변압기 누설전류 통합 감시 장치는 변압기 중성점 접지선에 흐르는 누설전류를 검출하여 실시간으로 모니터링이 가능한 장치로, 지정 값 이상의 누설전류가 검출되면 관리자에게 경보함으로써 전기적인 사고를 사전에 예방할 수 있다. 본 논문에서는 변압기 누설전류 통합 감시장치에 대해 설명하고 실제 변압기 누설전류 통합 감시장치가 설치된 수용가의 누설전류량 측정을 통해 안전성 여부를 판단하였다.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제50권2호
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• pp.60-64
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• 2001

The degradation process of silicone rubber was investigated by leakage current monitoring in Inclined-Plane method. DAS (Data Acquisition System) with 12-bit, 8-channel A/D converter was prepared. Average current, cumulative charge, current waveform and the number of peak pulses were measured on-line. And, FFT (Fast Fourier Transform) analysis was performed with stored current waveform. Besides, maximum erosion depth was measured in order to use as the indicator of the degradation process. So, the results of leakage current components and maximum erosion depth measurements were compared to find one or more components which have trends of changing similarly to that of erosion process. The result suggests that the ratio of peak current to r.m.s. current, harmonic contents and the number of peak pulses are well corresponding with the degradation process.

• 조명전기설비학회논문지
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• 제24권5호
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• pp.106-113
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• 2010

누설전류를 그대로 방치할 경우 전기로 인한 감전, 화재 등 여러 가지 재해요인이 될 수 있으므로 상시감시가 필요하다. 그러나 변전소 관리를 무인화 또는 순회점검으로 실시하는 곳이 대부분이므로 상시 감시에 어려움이 있어 사고발생시 원인을 즉시 제거하지 못하고 누설전류에 의해 비상발전기의 OCGR이 작동되어 ACB가 차단될 경우 비상발전기의 가동이 중지되는 문제점이 있다. 이러한 문제점을 방지하기 위해 변압기 저압측 중성점 접지선으로 귀환하는 누설전류를 실시간 모니터링할 수 있는 변압기 누설전류 통합 감시 장치를 제안하였다. 따라서 본 논문에서는 저압전로와 기기의 절연이 열화 또는 파괴되어 흐르는 누설전류의 영향을 시뮬레이션을 통해 알아보고 사례연구를 통해 통합 감시 장치의 우수성을 검증하였다.