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KR960032007A - Insulation monitoring system - Google Patents

Insulation monitoring system Download PDF

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Publication number
KR960032007A
KR960032007A KR1019950024069A KR19950024069A KR960032007A KR 960032007 A KR960032007 A KR 960032007A KR 1019950024069 A KR1019950024069 A KR 1019950024069A KR 19950024069 A KR19950024069 A KR 19950024069A KR 960032007 A KR960032007 A KR 960032007A
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South Korea
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leakage current
monitoring system
insulation
insulation monitoring
current
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KR100219013B1 (en
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도시히꼬 미야우찌
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기따오까 다까시
미쯔비시 덴끼 가부시끼가이샤
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

전원에서 급전되는 피감시 전기 회로의 누설 전류를 운전정지하지 않고 측정하고 측정한 누설 전류에서 절연 저항을 구하고 절연 악화 상황을 파악해서 절연 진단이 가능한 절연 감시 시스템을 제공한다.It provides insulation monitoring system that can measure insulation leakage current of electric circuit to be fed from power source without measuring the insulation current, obtain insulation resistance from measured leakage current, identify insulation deterioration situation, and diagnose insulation.

전원에서 급전되는 피감시 전기 회로에 전원 주파수의 단상 교류 전압 또는 직류 전압을 중첩하고 이 계측전압에 의한 피감시 전기 회로 누설 전류를 검출하고 이 누설 전류에서 피감시 전기 회로의 절연 저항을 구해서 실시간에 표시한다.Superimposed single-phase alternating current or direct current voltage of power frequency on the monitored electric circuit supplied by the power supply, detecting the monitored electric circuit leakage current by this measured voltage, and obtaining the insulation resistance of the monitored electric circuit from this leakage current. Display.

피감시 전기 회로를 정지하지 아니하고 절연 저항이 실시간에 감시되고 절연 악화의 상황에서 갱신, 점검의 시기를 간단히 예측할 수가 있다.The insulation resistance is monitored in real time without stopping the monitored electrical circuit, and it is possible to easily predict the timing of renewal and inspection in the event of insulation deterioration.

Description

절연 감시 시스템Insulation monitoring system

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 의한 절연 감시 시스템에 관한 실시예 1의 구성을 도시하는 구성도,1 is a block diagram showing the configuration of Embodiment 1 of the insulation monitoring system according to the present invention;

제2도는 제1도에 도시하는 실시예 1에 사용되는 회로 보호 장치의 내부 구성을 도시하는 블록도,FIG. 2 is a block diagram showing an internal configuration of a circuit protection device used in the first embodiment shown in FIG.

제3도는 제1도에 도시하는 실시예 1에 사용되는 계측 전압 중첩 수단의 구성을 도시하는 블록도.3 is a block diagram showing the configuration of measurement voltage superimposing means used in Embodiment 1 shown in FIG.

Claims (18)

전원에서 급전되는 피감시 전기 회로에 접지 수단을 거쳐서 전원 주파수와는 다른 주파수의 단상 교류의 계측 전압을 중첩하는 계측 전압 중첩 수단과, 상기 피감시 전기 회로에 흐르는 불평형 전류를 검출하는 불평형 전류 검출 수단과, 이 불평형 전류 검출 수단이 검출한 불평형 전류에서 상기 계측 전압과 동일한 주파수의 성분으로 또한 계측 전압과 동일 위상인 누설 전류 중의 유효성분을 검출하는 누설 전류 검출 수단과, 이 누설 전류 유효성분을 적분하고, 누설 전류 디지털 신호로 변환하는 연산 수단과, 상기 누설 전류 디지털 신호에 의거해서 상기 피감기 전기 회로를 감시, 제어하는 감지 제어 수단으로 이루어지는 절연 감시 시스템.Measurement voltage superimposing means for superimposing the measured voltage of single-phase alternating current at a frequency different from the power supply frequency via a grounding means to the monitored electric circuit supplied by the power supply, and an unbalanced current detecting means for detecting an unbalanced current flowing through the monitored electric circuit. And leakage current detection means for detecting an active component in the leakage current that is in phase with the measurement voltage and at the same frequency as the measurement voltage in the unbalance current detected by the unbalance current detection means, and the leakage current effective component is integrated. And sensing means for converting into a leakage current digital signal, and sensing control means for monitoring and controlling the wound electrical circuit based on the leakage current digital signal. 제1항에 있어서, 누설 전류 검출 수단은 계측 전압과 동일 주파수의 성분을 검출하는 수단과, 계측 전압에 동기한 신호를 출력하는 계측 전압 동기 신호 발생 수단의 출력신호에 의해 동기검파하는 수단으로 이루어지는 것을 특징으로 하는 절연 감시 시스템.The leakage current detecting means comprises: means for detecting a component having the same frequency as the measured voltage, and means for synchronously detecting by an output signal of the measured voltage synchronizing signal generating means for outputting a signal synchronized with the measured voltage. Insulation monitoring system, characterized in that. 제1항 또는 제2항에 있어서, 계측 전압의 주파수는 전원 주파수보다 낮은 주파수인 것을 특징으로 하는 절연 감시 시스템.The insulation monitoring system according to claim 1 or 2, wherein the frequency of the measurement voltage is lower than the power supply frequency. 제1항 또는 제2항에 있어서, 계측 전압의 주파수는 전원 주파수보다 높은 150~500Hz의 사이의 임의의 주파수인 것을 특징으로 하는 절연 감시 시스템.The insulation monitoring system according to claim 1 or 2, wherein the frequency of the measurement voltage is any frequency between 150 and 500 Hz higher than the power supply frequency. 전원에서 급전되는 피감시 전기 회로에 접지 수단을 거쳐서 전원 주파수와는 다른 2종류의 주파수의 단상 교류의 계측 전압을 중첩하는 계측 전압 중첩 수단과, 상기 피감시 전기 회로에 흐르는 불평형 전류를 검출하는 불평형 전류 검출 수단과, 이 불평형 전류 검출 수단이 검출한 불평형 전류에서 상기 각 계측 전압과 동일한 주파수의 성분을 각각 검출하고, 이 각 계측 전압에 대응하는 불평형 전류에서 피감시 전기 회로의 누설 전류중의 유효성분을 연산해서 구하는 누설 전류 검출 수단과 상기 누설 전류 유효성분을 적분해서 누설 전류 디지탈 신호로 변환하는 연산 수단과, 상기 누설 전류 디지탈 신호에 의거해서 상기 피감기 전기 회로를 감시, 제어하는 감지 제어 수단으로 이루어지는 절연 감시 시스템.Measurement voltage superimposition means for superimposing measurement voltages of single-phase alternating currents of two kinds of frequencies different from the power supply frequency via a grounding means to the monitored electric circuit supplied by the power supply, and an unbalance for detecting an unbalanced current flowing through the monitored electric circuit. The current detection means and the unbalanced current detected by the unbalanced current detection means respectively detect a component having the same frequency as each of the measured voltages, and the unbalanced current corresponding to each measured voltage is effective in the leakage current of the monitored electric circuit. Leakage current detection means for calculating a component, calculating means for integrating the leakage current effective component and converting it into a leakage current digital signal, and sensing control means for monitoring and controlling the wound electrical circuit based on the leakage current digital signal. Insulation monitoring system. 제5항에 있어서, 2종류의 계측 전압의 주파수는 전원 주파수보다 낮은 주파수임을 특징으로 하는 절연 감시 시스템.The insulation monitoring system according to claim 5, wherein the frequencies of the two types of measurement voltages are lower than the power supply frequency. 제5항에 있어서, 2종류의 계측 전압의 주파수는 전원 주파수보다 높은 150~500Hz의 사이의 다른 임의의 주파수임을 특징으로 하는 절연 감시 시스템.The insulation monitoring system according to claim 5, wherein the frequencies of the two types of measurement voltages are any other frequencies between 150 and 500 Hz higher than the power supply frequency. 전원에서 급전되는 피감시 전기 회로에 접지 수단을 거쳐서 직류의 계측 전압을 중첩하는 계측 전압 중첩 수단과, 상기 피감시 전기 회로에 흐르는 불평형 전류를 검출하는 불평형 전류 검출 수단과, 이 불평형 전류 검출 수단이 검출한 불평형 전류에서 전원 주파수 성분 및 고주파 성분을 제거해서 피감시 전기 회로의 누설 전류를 검출하는 누설 전류 검출 수단과, 이 누설 전류를 누설 전류 디지탈 신호로 변환하는 연산 수단과, 상기 누설 전류 디지탈 신호에 의거해서 상기 피감시 전기 회로를 감시, 제어하는 감지 제어 수단으로 이루어지는 절연 감시 시스템.Measured voltage superimposing means for superimposing a measured voltage of direct current through a grounding means in the monitored electric circuit supplied from the power supply, unbalanced current detecting means for detecting an unbalanced current flowing in the monitored electric circuit, and the unbalanced current detecting means Leakage current detection means for detecting the leakage current of the monitored electric circuit by removing the power source frequency component and the high frequency component from the detected unbalanced current, arithmetic means for converting the leakage current into a leakage current digital signal, and the leakage current digital signal. The insulation monitoring system which consists of sensing control means which monitors and controls the said monitored electric circuit based on this. 제1항 또는 제2항에 있어서, 계측 전압 중첩 수단 및 누설 전류 검출 수단은 감시 제어 수단에 의해 제어되는 것을 특징으로 하는 절연 감시 시스템.The insulation monitoring system according to claim 1 or 2, wherein the measurement voltage superimposing means and the leakage current detecting means are controlled by supervisory control means. 제1항 또는 제2항에 있어서, 감지 제어 수단에 일정 기간마다의 누설 전류치를 기억하고, 이 누설 전류치의 변화를 상시 감시하는 것과 함께 미리 설정된 한계치를 넘었을 때에 경보를 내는 기능을 구비하는 것을 특징으로 하는 절연 감시 시스템.The method according to claim 1 or 2, wherein the sensing control means has a function of storing a leakage current value for each fixed period, constantly monitoring the change of the leakage current value, and alarming when a preset limit value is exceeded. Insulation monitoring system. 제1항 또는 제2항에 있어서, 누설 전류 검출 수단에, 누설 전류 유효 성분을 일정시간 갖고 평균화 처리하는 평균화 처리 기능을 구비한 것을 특징으로 하는 절연 감시 시스템.The insulation monitoring system according to claim 1 or 2, wherein the leakage current detecting means has an averaging processing function for averaging the leakage current active component for a predetermined time. 제1항 또는 제2항에 있어서, 감시 제어 수단에, 누설 전류 유효 성분을 그래프화하는 그래프화 기능을 구비한 것을 특징으로 하는 절연 감시 시스템.The insulation monitoring system according to claim 1 or 2, wherein the monitoring control means includes a graphing function for graphing the leakage current active component. 제1항 또는 제2항에 있어서, 감시 제어 수단에, 누설 전류 유효 성분과 누설 전류 무효 성분을 합쳐서 그래프화하는 그래프화 기능을 구비한 것을 특징으로 하는 절연 감지 시스템.The insulation detection system according to claim 1 or 2, wherein the monitoring control means has a graphing function for graphing the leakage current active component and the leakage current reactive component. 제5항 또는 제7항 중 어느 한 항에 있어서, 계측 전압 중첩 수단 및 누설 전류 검출 수단은 감시 제어 수단에 의해 제어되는 것을 특징으로 하는 절연 감시 시스템.The insulation monitoring system according to any one of claims 5 to 7, wherein the measurement voltage superimposing means and the leakage current detecting means are controlled by supervisory control means. 제5항 또는 제7항 중 어느 한 항에 있어서, 감시 제어 수단에 일정 기간마다의 누설 전류치를 기억하고, 이 누설 전류치의 변화를 상시 감시하는 것과 함께 미리 설정된 한계치를 넘었을 때에 경보를 내는 기능을 구비하는 것을 특징으로 하는 절연 감시 시스템.The function according to any one of claims 5 to 7, wherein the monitoring control means stores the leakage current value for each fixed period, constantly monitors the change of the leakage current value, and issues an alarm when the preset limit value is exceeded. Insulation monitoring system comprising a. 제5항 또는 제7항 중 어느 한 항에 있어서, 누설 전류 검출 수단에, 누설 전류 유효 성분을 일정시간 갖고 평균화 처리하는 평균화 처리 기능을 구비한 것을 특징으로 하는 절연 감시 시스템.8. The insulation monitoring system according to any one of claims 5 to 7, wherein the leakage current detecting means has an averaging processing function for averaging the leakage current active component for a predetermined time period. 제5항 또는 제7항 중 어느 한 항에 있어서, 감지 제어 수단에, 누설 전류 유효 성분을 그래프화하는 그래프화 기능을 구비한 것을 특징으로 하는 절연 감지 시스템.8. The insulation detection system according to any one of claims 5 to 7, wherein the detection control means includes a graphing function for graphing the leakage current active component. 제5항 또는 제7항 중 어느 한 항에 있어서, 감지 제어 수단에, 누설 전류 유효 성분과 누설 전류 무효 성분을 합쳐서 그래프화하는 그래프화 기능을 구비한 것을 특징으로 하는 절연 감시 시스템.8. The insulation monitoring system according to any one of claims 5 to 7, wherein the sensing control means has a graphing function for graphing the leakage current active component and the leakage current reactive component. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임※ Note: The disclosure is based on the initial application.
KR1019950024069A 1995-02-13 1995-07-31 Insulation monitoring system Expired - Fee Related KR100219013B1 (en)

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JP95-24048 1995-02-13
JP2404895 1995-02-13

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KR100639748B1 (en) * 2001-10-04 2006-10-30 가부시키가이샤 히타치세이사쿠쇼 Measurement method of leakage current
KR100740826B1 (en) * 2004-08-05 2007-07-19 김영일 Uninterruptible Insulation Resistance Measurement Device
KR101276171B1 (en) * 2006-08-16 2013-06-18 (주)오성메가파워 insulation monitoring system
KR101276173B1 (en) * 2006-08-16 2013-06-18 (주)오성메가파워 Insulation Monitoring System
KR102710031B1 (en) * 2023-04-10 2024-09-25 한국기술교육대학교 산학협력단 Apparatus for monitoring insulation resistance for electric storage devices

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KR102495562B1 (en) 2022-04-13 2023-02-06 (주)비즈커넥트 Measuring device and method of insulation resistance and capacitance of each phase in live wire state in main circuit of 3-phase 4-wire type electrical equipment
CN117630586B (en) * 2023-10-24 2024-10-15 福建时代星云科技有限公司 Insulation detection method and terminal of energy storage system

Cited By (9)

* Cited by examiner, † Cited by third party
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KR100639748B1 (en) * 2001-10-04 2006-10-30 가부시키가이샤 히타치세이사쿠쇼 Measurement method of leakage current
KR100840040B1 (en) * 2001-10-04 2008-06-19 가부시키가이샤 히타치세이사쿠쇼 monitor
KR100840042B1 (en) * 2001-10-04 2008-06-19 가부시키가이샤 히타치세이사쿠쇼 monitor
KR100840041B1 (en) * 2001-10-04 2008-06-19 가부시키가이샤 히타치세이사쿠쇼 Surveillance system
KR100840039B1 (en) * 2001-10-04 2008-06-19 가부시키가이샤 히타치세이사쿠쇼 How to measure resistance
KR100740826B1 (en) * 2004-08-05 2007-07-19 김영일 Uninterruptible Insulation Resistance Measurement Device
KR101276171B1 (en) * 2006-08-16 2013-06-18 (주)오성메가파워 insulation monitoring system
KR101276173B1 (en) * 2006-08-16 2013-06-18 (주)오성메가파워 Insulation Monitoring System
KR102710031B1 (en) * 2023-04-10 2024-09-25 한국기술교육대학교 산학협력단 Apparatus for monitoring insulation resistance for electric storage devices

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