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CN1098566A - 对地泄漏单元 - Google Patents

对地泄漏单元 Download PDF

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Publication number
CN1098566A
CN1098566A CN94104578A CN94104578A CN1098566A CN 1098566 A CN1098566 A CN 1098566A CN 94104578 A CN94104578 A CN 94104578A CN 94104578 A CN94104578 A CN 94104578A CN 1098566 A CN1098566 A CN 1098566A
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CN
China
Prior art keywords
ground
iron core
coil
ancillary coil
leakage unit
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN94104578A
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English (en)
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CN1042683C (zh
Inventor
单特·巴加林尼
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Circuit Breakers Ind Ltd
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Circuit Breakers Ind Ltd
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Filing date
Publication date
Application filed by Circuit Breakers Ind Ltd filed Critical Circuit Breakers Ind Ltd
Publication of CN1098566A publication Critical patent/CN1098566A/zh
Application granted granted Critical
Publication of CN1042683C publication Critical patent/CN1042683C/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial imbalance for other protection or monitoring reasons or remote control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/338—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers also responsive to wiring error, e.g. loss of neutral, break
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Cable Accessories (AREA)
  • Breakers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

一种对地泄漏单元(10)，包括一个铁芯(12)，两 个负载电流承载线(14)、(16)穿过铁芯(12)。主线圈 (44)在铁芯(12)上，用于检测线(14)、(16)上的电流 不平衡。辅助线圈(18)绕在铁芯(12)上。当所施电 压超过一预定值时，一对与线圈(18)串联连接的背靠 背齐纳二极管(20)向线圈(18)供电。

Description

本发明涉及一种对地泄漏单元。
根据本发明，提供一种对地泄漏单元，它包括：
一个铁芯;
至少两根穿过该铁芯的负载电流承载线;
在铁芯上有一个用于检测载流线中的电流不平衡的主线圈;
在铁芯上有一个辅助线圈;以及
一个与辅助线圈串联连接的装置，当所施电压超过一预定值时，该装置供给流经辅助线圈的电流。
下面，将可以理解，采用单相系统，在应用时，一根火线和一根中性线穿过该铁芯。然后辅助线圈和供电装置可以被连接在采用该对地泄漏单元的电气系统的中性电缆和地之间，或者接在火线电缆和地之间，或者连接在火线电缆和中性电缆之间。还将可以知道，如果辅助线圈在中性线与地之间，若中性线上的电压升高超过一预定值，则该单元将跳闸，当中性点对地电压超过一预定值，或中性线完全失去时，就会出现这样的情况。同样，如果辅助线圈连接在火线与地或中性线之间，该单元将提供过电压保护。
本领域的技术人员还将知道，对地泄漏单元通常还有一个绕在铁芯上的测试线圈，用它可以对地泄漏单元进行测试。辅助线圈也可以方便地用于这一目的。因而，辅助线圈也可以经一个测试按钮连到DC电压源（它也许会脉动）上。测试按钮可以与供电装置并联。
供电装置可以方便地包括与一个限流电阻器串联的一对背靠背齐纳二极管（Zener  diode）。
另外，对地泄漏单元可以有一个DC供电装置，用于向该单元的电子元件供DC电流，该DC供电装置跨接在火线和中性线之间。
现参考附图，以实施例的方式叙述本发明。
图1至4均为按照本发明的对地泄漏单元的部分原理性电路图。
参照图1，按照本发明的对地泄漏单元总体上用标号10表示。必须知道，图1没有示出对地泄漏单元的全部元件，而仅仅示出了与本发明相关的那些元件。
与常规对地泄漏单元一样，图1所示的对地泄漏单元10有一个铁芯12，火线14和中性线16穿过该铁芯。火线14和中性线16分别经接触器34连到输入端子26和28上。使用时，端子26和28连到火线和中性供电电缆上。火线和中性线14和16也连到输出端子36和38上，使用时该端子连到负载上（通常通过断路器）。
对地泄漏单元10还有一个输入端子40，使用时连到电气网状系统的地上。
传感线圈44绕在铁芯12上，该传感线圈44检测线16和14中的电流不平衡。
对地泄漏单元10还有一个绕在铁芯12上的辅助线圈18。线圈18的一端连到地端40，另一端经电阻器22和一对背靠背齐纳二极管20连到中性线16上。
对地泄漏单元10还有一个DC供电电路，它包括一个经电阻器和电容器32连到火线14和中性线16并经引线42连到电子线路（没示出）的全波整流器30。
应用时，如果火线14和中性线16上的电流出现不平衡，就使铁芯12中产生磁场，它在传感线圈44中感应出电压，电子线路（没示出）检测出该电压，使接触器34动作。
若中性线16的对地电压升高，超过一预定值（由齐纳二极管20确定），则电流流经辅助线圈18，增加了铁芯12中的磁场。这一现象由传感线圈44检测出，使接触器34带电（energised）
同样，如果中性供电线脱落，经整流器30向电子线路供电的电流将通过线圈18流到大地，也会引起对地泄漏单元10跳闸。
参照图2，示出另一对地泄漏单元50。该对地泄漏单元50与图1中所示的对地泄漏单元10类似，以类似方式标号。
图2所示对地泄漏单元50中，也用辅助线圈18提供测试功能。不用提供通常情况下的经测试按钮连到整流器30的另一线圈。整流器30经按钮开关54和电阻器56连到齐纳二极管20和线圈18之间的结点上。另外，齐纳二极管20的另一端经平流电阻器32连到中性线16上，而不是直接连到中性线16上。若开关54闭合，电流经线圈18流向大地，因而模拟了一个故障，使对地泄漏单元50跳闸。
再参照图3，用标号60总体上表示按照本发明的对地泄漏单元的另一实施例。该对地泄漏单元60与图2所示的对地泄漏单元50相似。然而，线圈及其相关的齐纳二极管20和电阻器22不连接在大地与中性线之间，而是连在火线14和中性线16之间。因而，如果供电电压超过一预定值，电流将流经辅助线圈18，对地泄漏单元60将跳闸。
图4所示对地泄漏单元70与对地泄漏单元50相同，只是线圈18、齐纳二极管20和电阻器22连在火线和大地之间。在图4的实施例中，如果线对地供电电压超过一预定值，对地泄漏单元70将跳闸。
另外，在图2和图4所示的实施例中，若不接地或具有高电阻值，测试按钮将不会使该单元动作。这表明装置的安装存在有产生潜在危险的条件。

Claims (6)

1、一种对地泄漏单元，包括
一个铁芯；
至少两根穿过该铁芯的负载电流承载线；
在铁芯上有一个用于检测载流中的电流不平衡的主线圈；
在铁芯上有一个辅助线圈；以及
一个与辅助线圈串联连接的装置，当所施电压超过一预定值时，该装置供给流经辅助线圈的电流。
2、权利要求1所述的单元，有端子用于连到电气系统中性供电电缆和地，其中所述供电装置和辅助线圈连接在这些端子之间。
3、权利要求1所述的单元，有端子用于连到电气系统的火线供电电缆和地，其中所述供电装置和辅助线圈连接在这些端子之间。
4、权利要求1所述的单元，有端子用于连接到电气系统的火线和中性供电电缆，其中所述供电装置和辅助线圈连接在这些端子之间。
5、权利要求1所述的单元，包括一个DC电压源单元和一个测试按钮，辅助线圈也连到测试按钮。
6、权利要求1所述的单元，其中所述供电装置包括一对背靠背齐纳二极管和一个限流电阻器。
CN94104578A 1993-07-09 1994-04-15 对地泄漏单元 Expired - Fee Related CN1042683C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA93/4962 1993-07-09
ZA934962 1993-07-09

Publications (2)

Publication Number Publication Date
CN1098566A true CN1098566A (zh) 1995-02-08
CN1042683C CN1042683C (zh) 1999-03-24

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CN94104578A Expired - Fee Related CN1042683C (zh) 1993-07-09 1994-04-15 对地泄漏单元

Country Status (7)

Country Link
US (1) US5488303A (zh)
EP (2) EP0633640B1 (zh)
JP (1) JPH0729479A (zh)
CN (1) CN1042683C (zh)
AT (2) ATE167593T1 (zh)
DE (2) DE69411086T2 (zh)
ZA (1) ZA94924B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104603894A (zh) * 2012-08-29 2015-05-06 京瓷株式会社 零相序变流器、接地故障电流检测装置、电力调节器及用于检测零相序变流器的故障的方法

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6292337B1 (en) * 1993-08-05 2001-09-18 Technology Research Corporation Electrical system with arc protection
PL176938B1 (pl) * 1994-01-24 1999-08-31 Schrack Eh Energietechnik Gmbh Wyłącznik ochronny prądu szczątkowego
US5990687A (en) * 1997-05-29 1999-11-23 Williams; Thomas H. Measuring shield breaks in coaxial cable by a sheath test current
DE19817971A1 (de) * 1998-04-22 1999-10-28 Armin Weigl PEN-Leiter Überwachung durch Spannungsauswertung vonMp- und PE-Leiter im Verbrauchernetz
ES2156684B1 (es) * 1998-10-14 2002-02-01 Gordon Jose Maria Romero Sistema de proteccion electrica en baja tension frente a averias por perdida de la continuidad electrica del hilo neutro entre el centro de transformacion y la acometida particular.
US6191697B1 (en) 1999-04-19 2001-02-20 International Business Machines Corporation Circuit continuity detection system and method
ES2170671B1 (es) * 2000-06-20 2003-09-16 Gordon Salvador Romero Dispositivo electronico de proteccion electrica en baja tension frente a sobretensiones en el punto de suministro particular.
US7684162B2 (en) * 2007-03-21 2010-03-23 Magnetic Metals Corporation Leakage current protection device
JP5137242B2 (ja) * 2008-03-19 2013-02-06 テンパール工業株式会社 回路遮断器
US8810979B2 (en) * 2010-03-09 2014-08-19 Siemens Industry, Inc. Method and apparatus for supervisory circuit for ground fault circuit interrupt device
JP6429153B2 (ja) * 2015-04-22 2018-11-28 パナソニックＩｐマネジメント株式会社 遮断装置
US10630089B2 (en) * 2016-11-14 2020-04-21 Eaton Intelligent Power Limited Electric vehicle charging circuit breaker
US12334722B2 (en) 2022-12-30 2025-06-17 Schneider Electric USA, Inc. Ground fault circuit interrupter (GFCI) devices, systems, and methods

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356939A (en) * 1964-03-25 1967-12-05 Fed Pacific Electric Co Ground leakage detection apparatus for ungrounded systems including toroidal core detector means
US4037155A (en) * 1974-04-15 1977-07-19 Rca Corporation Current-responsive threshold detection circuitry
US3891895A (en) * 1974-04-15 1975-06-24 Rca Corp Ground fault detection
US3978400A (en) * 1974-11-25 1976-08-31 Square D Company Ground fault detector with a nonlinear sensing means
US4021729A (en) * 1975-12-03 1977-05-03 I-T-E Imperial Corporation Cross-field ground fault sensor
NL176508C (nl) * 1977-06-14 1985-04-16 Hazemeijer Bv Voedingsapparaat voor een beveiligingsinrichting, zoals een aardlekdetectie-inrichting, benevens met een dergelijk voedingsapparaat uitgeruste beveiligingsinrichting.
US4180841A (en) * 1977-11-21 1979-12-25 Westinghouse Electric Corp. Ground fault circuit interrupter with grounded neutral protection
EP0020080A1 (en) * 1979-05-29 1980-12-10 Trident Equipment Limited Improvements relating to earth leakage protection devices
GB8332815D0 (en) * 1983-12-08 1984-01-18 Ashley Accessories Ltd Electrical accessories
US4598331A (en) * 1984-07-30 1986-07-01 Technology Research Corporation Ground fault current interrupter circuit with open neutral and ground lead protection
GB2244398B (en) * 1990-05-25 1994-03-16 Mk Electric Ltd Electrical protection devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104603894A (zh) * 2012-08-29 2015-05-06 京瓷株式会社 零相序变流器、接地故障电流检测装置、电力调节器及用于检测零相序变流器的故障的方法
CN104603894B (zh) * 2012-08-29 2018-09-28 京瓷株式会社 零相序变流器、接地故障电流检测装置、电力调节器及用于检测零相序变流器的故障的方法

Also Published As

Publication number Publication date
US5488303A (en) 1996-01-30
EP0633640B1 (en) 1998-06-17
DE69413954T2 (de) 1999-03-11
DE69413954D1 (de) 1998-11-19
DE69411086T2 (de) 1998-11-19
ATE167593T1 (de) 1998-07-15
CN1042683C (zh) 1999-03-24
EP0689271A1 (en) 1995-12-27
DE69411086D1 (de) 1998-07-23
EP0689271B1 (en) 1998-10-14
JPH0729479A (ja) 1995-01-31
EP0633640A3 (en) 1995-07-05
EP0633640A2 (en) 1995-01-11
ZA94924B (en) 1994-08-24
ATE172332T1 (de) 1998-10-15

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