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1. 发明专利

JPWO2006035519A1 漏洩電流遮断装置及び方法有权
公开(公告)号：JPWO2006035519A1
公开(公告)日：2008-05-15
申请号：JP2006537628
申请日：2005-01-31
申请人：豊次阿閉 , 豊次阿閉 , 大野武美 , 大野武美 , 頭本頼数 , 頭本頼数
发明人：豊次阿閉 , 豊次阿閉 , 宮澤　清 , 清宮澤
IPC分类号： G01R31/02 , H02H7/26
CPC分类号： H02H3/337 , G01R31/025
摘要：電線路から漏洩電流を検出する検出部(10)と、漏洩電流を電圧に変換し、高調波成分を除去する第1の除去部(12)と、電線路Aに発生している電圧を検出する電圧検出部(14)と、電圧に含まれている高調波成分を除去する第2の除去部(16)と、高調波成分が除去された信号波形から位相差を検出する位相差検出部(20)と、第2の除去部(16)により高調波成分が除去された電圧の信号波形に基づき電線路Aの周波数を算出する周波数算出部(21)と、位相差と周波数に基づき電線路Aの漏洩電流の位相角度を算出する位相角度算出部(22)と、第1の除去部(12)により高調波成分が除去された電圧の実効値を算出する実効値算出部(24)と、実効値と、漏洩電流の位相角度に基づき電線路Aに流れている漏洩電流に含まれている対地絶縁抵抗に起因する漏洩電流成分Igrを算出する算出部(27)と、算出部(27)で算出された漏洩電流成分Igrが、任意の値を超えたかどうかを判断する判断部(29)と、判断に基づいて電線路Aを遮断する遮断部(30)とを備える。

2. 发明专利

JP4159590B2 Leakage current cutoff apparatus and method 有权
公开(公告)号：JP4159590B2
公开(公告)日：2008-10-01
申请号：JP2006537628
申请日：2005-01-31
申请人：大野武美 , 豊次阿閉 , 頭本頼数
发明人：清宮澤 , 豊次阿閉
IPC分类号： G01R27/02 , G01R31/02 , H02H7/26
CPC分类号： H02H3/337 , G01R31/025
摘要： A leak current breaker is provided which includes a detector (10) to detect a leakage current from electric lines, a first removing unit (12) to convert the detected leakage current into a voltage and a voltage detector (14) to detect a voltage developed in electric lines A under testing, a second removing unit (16) to remove a harmonic component included in the voltage, a phase contrast detector (20) to detect a phase contrast from a signal waveform having the harmonic component removed, a frequency calculator (21) to calculate a frequency occurring on electric lines A on the basis of the signal waveform of the voltage having the harmonic component removed by the second removing unit (16), a phase angle calculator (22) to calculate a phase angle of the leakage current flowing through the electric lines A on the basis of the phase contrast and frequency, a root-mean-square value calculator (24) to calculate a root-mean-square value of the voltage having the harmonic component removed by the first removing unit (12), a calculator (27) to calculate a leakage current component Igr arising from an earth insulation resistance included in the leakage current flowing through the electric lines A on the basis of the root-mean-square value and phase angle of the leakage current, a judging unit (29) to judge whether the leakage current component Igr calculated by the calculator (27) has exceeded an arbitrary value, and a circuit breaker (30) to break the electric lines A on the basis of the judgment made by the judging unit (29).

3. 发明专利

JP4945727B2 Leakage current cutoff apparatus and method 有权
公开(公告)号：JP4945727B2
公开(公告)日：2012-06-06
申请号：JP2007152754
申请日：2007-06-08
申请人：豊次阿閉 , 頭本頼数
发明人：清宮澤 , 豊次阿閉
IPC分类号： G01R31/02 , G01R27/18 , H02H3/347
摘要： PROBLEM TO BE SOLVED: To provide leakage current interrupting device and method for intercepting a measured conductor line based on the detected value by detecting only leakage current Igr resulting from an insulation to the earth resistance. SOLUTION: Leakage current I which flows to the measured conductor line A is detected, the detected leakage current I is converted into a voltage, harmonic component is removed from the voltage after the conversion, the voltage V1 after the harmonic component is removed and the voltage V2 from the voltage line of the measured conductor line A is detected, and the harmonic component is removed from the detected voltage V2. The phase angle θ of the leakage current I which flows to the measured conductor line A is accurately obtained based on the voltage V2 which removed the harmonic component, only the leakage current Igr which originates to the earth insulation resistance from the accurate phase angle θ and the effective value I 0 of the voltage V1 after the conversion from which the harmonic component was removed is computed, the computed leakage current Igr is supervised, and when the leakage current Igr exceeds an arbitrary value, the measured conductor line A is intercepted. COPYRIGHT: (C)2007,JPO&INPIT

4. 发明专利

JP5329470B2 Leakage current detection apparatus and method 有权
公开(公告)号：JP5329470B2
公开(公告)日：2013-10-30
申请号：JP2010091731
申请日：2010-04-12
申请人：豊次阿閉 , 頭本頼数
发明人：豊次阿閉 , 清宮澤
IPC分类号： G01R31/02 , G01R27/18
摘要： PROBLEM TO BE SOLVED: To provide a leakage current detection apparatus and method for detecting only a leakage current Igr caused by insulation resistance to ground. SOLUTION: A leakage current I 0 flowing through an electric line to be measured, of which electrical system is a three phase (R phase, S phase (grounded phase), T phase), three wire system, is detected. A voltage V generated between non-grounded phases (R phase-T phase) of the electric line to be measured is detected. A phase difference is detected from the leakage current I 0 and voltage V. A power supply frequency generated in the electric line to be measured is calculated based on the voltage V. The phase angle θ of the leakage current flowing through the electric line to be measured is calculated based on the phase difference and power supply frequency. A leakage current component Igr caused by the insulation resistance to ground included in the leakage current I 0 flowing through the electric line to be measured is calculated based on the leakage current I 0 and phase angle θ. COPYRIGHT: (C)2010,JPO&INPIT

5. 发明专利

JP4920357B2 Leakage current detection apparatus and method 有权
公开(公告)号：JP4920357B2
公开(公告)日：2012-04-18
申请号：JP2006251440
申请日：2006-09-15
申请人：豊次阿閉
发明人：清宮澤 , 豊次阿閉
IPC分类号： G01R31/02 , G01R27/18
摘要： PROBLEM TO BE SOLVED: To detect the leakage current caused by insulation resistance to the ground. SOLUTION: The leakage current detection device comprises a leakage current detection part for detecting the leakage current from a measuring wireway; an amplifying part for amplifying the converted voltage from the detected leakage current; a first higher harmonic component eliminating part for eliminating the higher harmonic components contained in the voltage amplified in the amplifier part; a voltage-detecting part for detecting the voltage generating in the measuring wireway; a second higher harmonic component eliminating part for eliminating the higher harmonic component contained in the detected voltage; a phase difference detecting part for detecting the phase difference in the two voltages, in which the higher harmonic components are eliminated; a frequency-calculating part for calculating the frequency generated in the measuring wireway, the voltage of which is detected by the voltage detecting part, based on the voltage signal wave form in which the higher harmonic components are eliminated by the second higher harmonic component eliminating part; and a phase angle calculating means for calculating the phase angle of the leakage current flowing in the measuring wireway, based on the phase angle detected by the phase difference detecting part, and the frequency calculated in the frequency calculating part. COPYRIGHT: (C)2005,JPO&NCIPI

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