EP1507275B1 - Insertion type circuit breaker - Google Patents

Insertion type circuit breaker Download PDF

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Publication number
EP1507275B1
EP1507275B1 EP02728105A EP02728105A EP1507275B1 EP 1507275 B1 EP1507275 B1 EP 1507275B1 EP 02728105 A EP02728105 A EP 02728105A EP 02728105 A EP02728105 A EP 02728105A EP 1507275 B1 EP1507275 B1 EP 1507275B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
mounting base
plug
trip
lever
Prior art date
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.)
Expired - Lifetime
Application number
EP02728105A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1507275A4 (en
EP1507275A1 (en
Inventor
Kanehiro c/o Mitsubishi Denki K.K. KAWAKAMI
Akira c/o Mitsubishi Denki K.K. ISHIKAWA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1507275A1 publication Critical patent/EP1507275A1/en
Publication of EP1507275A4 publication Critical patent/EP1507275A4/en
Application granted granted Critical
Publication of EP1507275B1 publication Critical patent/EP1507275B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/126—Automatic release mechanisms with or without manual release actuated by dismounting of circuit breaker or removal of part of circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5866—Electric connections to or between contacts; Terminals characterised by the use of a plug and socket connector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/06—Housings; Casings; Bases; Mountings
    • H01H73/08—Plug-in housings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections

Definitions

  • the present invention relates to a Plug-In Circuit Breaker in which a circuit breaker body is detachable with respect to a mounting base and, more specifically, a Plug-In Circuit Breaker including a safety trip apparatus that brings a switch contact into an open circuit to interrupt a load current when inserting and pulling out the circuit breaker body.
  • Fig. 8 is a longitudinal cross sectional view of essential part in the state of having inserted base a circuit breaker body of the conventional Plug-In Circuit Breaker into a mounting, which is disclosed in the European Patent Publication No. WO 01/27959 .
  • Figs. 9 are enlarged cross sectional views when releasing engagement with a trip mechanism of a safety trip apparatus constituting the Plug-In Circuit Breaker of Fig. 8 .
  • Fig. 9(a) is an enlarged side cross-sectional view
  • Fig. 9(b) is a top cross-sectional view of an essential part of Fig. 9(a)
  • Fig. 9 (c) is an enlarged perspective view of an internal part showing a fitted state of a trip rod and a case.
  • a circuit breaker body includes: a plug-in terminal 4 serving as a terminal connecting member on the power supply side and on the load side to which a tulip-shaped connector 3 serving as a connection contact member, which is held in a case made of a molded insulator under a predetermined contact pressure applied by a pressure spring 2; a power supply terminal 5 and a load side terminal 6 attached respectively to each plug-in terminal 4; a switch contact (not shown) that is electrically connected between the power supply side terminal 5 and load side terminal 6, and makes and breaks a circuit where a load current flows; a switch mechanism (not shown) bringing this switch contact into an open or closed state; a trip mechanism (not shown) causing this switch mechanism to operate when an over-current flows in the circuit; and a handle 1a with which the switch mechanism can be manually operated.
  • a plug-in base 8 Disposed on the mounting base 7, into which the circuit breaker body 1 is plugged, are a plug-in base 8 made of a molded insulator; an external conductor 9 that is connected to both of the power supply side and the load side of the plug-in base 8; and a plug-in stud 10 serving as a terminal member to be plugged in and connected to the connector 3.
  • Numeral 11 designates a stud cover for fixing and insulating the plug-in stud 10.
  • Numeral 12 designates a trip shaft forming a part of the trip mechanism. This trip shaft 12 is biased clockwise by means of a spring (not shown). When any over-current flows in the circuit, the trip shaft 12 turns counterclockwise (in a direction indicated by the arrow F12) by a predetermined amount to bring the switch mechanism (not shown) into operation.
  • Numeral 13 designates a trip rod serving as a tripping operation member, one end 13a of which is engaged with the trip shaft 12 so as to move freely and the other end 13b of which is in contact with a protrusion 8a disposed at the plug-in base 8.
  • Numeral 14 designates a compression spring giving an impetus to the trip rod 13 toward the plug-in base 8.
  • Numeral 15 (shown in Fig. 9 ) designates a case located around outer circumferences of the trip rod 13 and compression spring 14. These trip rod 13, compression spring 14 and case 15 form a safety trip apparatus.
  • a protrusion 13c of the trip rod 13 moves to an upper surface portion 15b of the case 15, and thereafter is fitted to a concave part 15c.
  • one end 13a of the trip rod 13 turns by substantially 90° as well and becomes disengaged with the retainer 12a of the trip shaft 12, whereby the trip rod 13 comes to be incapable of moving in a direction indicated by the arrow F13.
  • the other end 13a of the trip rod 13 comes not to act on the retainer 12a of the trip shaft 12.
  • This invention is made to solve such problems, and has an object of obtaining a Plug-In Circuit Breaker in which the open/close check can be performed easily even in the state that the circuit breaker body is detached from the mounting base; as well as the safety trip apparatus can perform a primary tripping operation in the case of plugging the circuit breaker body into the mounting base, or in the case of detaching the circuit breaker body from the mounting base in the state that the open/close check can be carried out, specifically in the state that the trip rod is made stationary.
  • a Plug-In Circuit Breaker includes: a circuit breaker body including a switch contact that makes and breaks a circuit where a load current flows, a trip mechanism that brings the mentioned switch contact into an open circuit, and a connection contact member that conducts a load current to the mentioned circuit; and a mounting base including a terminal member that connects an external conductor as well as connects the mentioned connection contact member plugged in, and carries the mentioned circuit breaker.
  • This Plug-In Circuit Breaker further includes: a trip rod causing the mentioned trip mechanism to operate; a lever acting on the mentioned trip rod when plugging the mentioned circuit breaker body in the mentioned mounting base or detaching the mentioned circuit breaker body from the mentioned mounting base; an elastic member giving an impetus to this lever; and a lock mechanism for locking the mentioned lever against a bias force given by the mentioned elastic member when the mentioned circuit breaker body is detached from the mentioned mounting base.
  • This Plug-In Circuit Breaker is provided with a safety trip apparatus that causes the mentioned lock mechanism to be released (unlocked) to make the mentioned lever act on the mentioned trip rod by the bias force given by the mentioned elastic member, and brings the mentioned trip mechanism into operation resulting in an open circuit of the mentioned switch contact before the mentioned connection contact member comes in contact with the mentioned terminal member at the time of plugging the mentioned circuit breaker body in thementionedmountingbase in a state that the mentioned switch contact is in a closed circuit; and that makes the mentioned lever act on the mentioned trip rod by the bias force given by the mentioned elastic member, and brings the mentioned trip mechanism into operation resulting in an open circuit of the mentioned switch contact before separation between the mentioned terminal member and the mentioned connection contact member at the time of detaching the mentioned circuit breaker body from the mentioned mounting base in a state that the mentioned switch contact is in a closed circuit.
  • the safety trip apparatus performs a primary tripping operation even in the case of plugging the circuit breaker body in the mounting base, or in the case of detaching the circuit breaker body from the mounting base in the state that the open/close check can be carried out, specifically, in the state that the trip rod is made stationary.
  • the mentioned lock mechanism includes a projection-engaging portion disposed at the circuit breaker body; an arm to engage with the mounting base when the mentioned circuit breaker body is plugged in the mentioned mounting base; and a projection that is engaged with and locked at the mentioned projection-engaging portion when the mentioned circuit breaker body is detached from the mentioned mounting base, and is released from the mentioned projection-engaging portion in dependence upon engagement between the mentioned mounting base and the mentioned arm when the mentioned circuit breaker body is plugged in the mounting base.
  • the mentioned lever is provided with a cylindrical part acting on the trip rod at one end portion and a projection engaging with the projection-engaging portion at the other end portion, and is held in a turnable manner by means of an elastic member about a pin, which is inserted and fitted at a substantially central portion, acting as a fulcrum.
  • a distance between the centers of the pin and the cylindrical part is made substantially the same as, or larger than, a distance between the centers of the mentioned pin and a protrusion of the lever, which can come in contact with a lever catching portion formed at the plug-in base.
  • a contact surface of the projection coming in contact with the projection-engaging portion is formed into a taper configuration.
  • the projection can be easily released from the projection-engaging portion at the time of plugging in the circuit breaker body.
  • it is possible to achieve a firm engagement of the projection therewith.
  • Fig. 1 is a cross sectional view of an essential part in the state that a circuit breaker body of a Plug-In Circuit Breaker is detached from a mounting base according to a first preferred embodiment of the present invention.
  • Fig. 2 is a top sectional view of the essential part of the circuit breaker body taken from a load side.
  • Fig. 3 is an enlarged perspective view of a safety trip apparatus of the Plug-In Circuit Breaker according to the first embodiment of this invention.
  • a circuit breaker body 1 comprises within a case made of a molded insulator: a plug-in terminal 4 serving as a terminal connecting member on the power supply side and on the load side to which a tulip-shaped connector 3 serving as a connection contact member, which is held in a case made of a molded insulator under a predetermined contact pressure applied by a pressure spring 2; a power supply side terminal 5 and a load side terminal 6 attached respectively to each plug-in terminal 4; a switch contact (not shown) that is electrically connected between the power supply side terminal 5 and load side terminal 6, and makes and breaks a circuit where a load current flows; a switch mechanism (not shown) bringing this switch contact into an open or closed state; a trip mechanism (not shown) causing this switch mechanism to operate; and a handle 1a with which the switch mechanism can be operated.
  • the mounting base 7, into which the circuit breaker body 1 is plugged, is provided with a plug-in base 8 made of a molded insulator; an external conductor 9 that is connected to both of the power supply side and the load side of the plug-in base 8; and a plug-in stud 10 serving as a terminal member to be plugged in and connected to the connector 3.
  • Numeral 11 designates a stud cover for fixing and insulating the plug-in stud 10.
  • Numeral 12 designates a trip shaft forming a part of the trip mechanism. This trip shaft 12 is biased counterclockwise by means of a spring (not shown). When an over-current flows in the circuit, the trip shaft 12 turns counterclockwise (in a direction indicated by the arrow F1) by a predetermined amount to bring the switch mechanism (not shown) into operation.
  • Numeral 15 designates an intermediate actuator that cooperates with a trip rod 21 as described later to turn in a direction indicated by the arrow F2 about a shaft 15a as a fulcrum, and causes the trip shaft 12 to operate.
  • numeral 20 designates a safety trip apparatus, which is comprised of: a trip rod 21 causing the intermediate actuator 15 to turn; a lever 22 that acts on the trip rod 21 when plugging the circuit breaker body 1 into the mounting base 7, or detaching the circuit breaker body 1 from the mounting base 7; a helical spring 23 serving as an elastic member giving an impetus to this lever 22; and a bracket 25 secured to the circuit breaker body 1 by means of a clamping screw 24; and a pin 26 that runs through a through hole 25a of the bracket 25, a through hole 22a of the lever 22, the helical spring 23 and a through hole 25b of the bracket 25, and inserted and fitted in a substantially central portion of the lever 22 to hold the lever 22 in a turnable manner.
  • the lever 22 is also provided integrally at the other endportion thereof with an arm 22c to be engaged with the mounting base 7 when the circuit breaker body 1 is plugged in the mounting base 7, and a projection 22d to be engaged with a projection-engaging portion 25d of an engaging hole 25 provided in the bracket 25.
  • the helical spring 23 gives an impetus to the lever 22 in a direction indicated by the arrow F3.
  • the arm 22c comes to engage with the mounting base 7, and the projection 22d is released from the projection-engaging portion 25d.
  • the lever 22 turns in a direction indicated by the arrow F3 and moves in a direction indicated by the arrow F4, and eventually a tip portion 21b of the trip rod 21 acts on the intermediate actuator 15a.
  • a lock mechanism 30 is formed of the proj ection-engaging portion 25d of the engaging hole 25c provided in the bracket 25, the arm 22c to be engaged with an arm catching portion 8a of the mounting base 7 as described later when the circuit breaker body 1 is plugged in the mounting base 7, and the projection 22d that is engaged with and caught at the proj ection-engaging portion 25d when the circuit breaker body 1 is detached from the mounting base 7 and that is released from the projection-engaging portion 25d in dependence upon the engagement between the mounting base 7 and the arm 22 when the circuit breaker 1 is plugged in the mounting base 7.
  • Fig. 4 is a longitudinal cross sectional view of essential portion in the state on the way of plugging the circuit breaker body of the Plug-In Circuit Breaker into the mounting base according to the first embodiment of this invention.
  • Fig. 5 is a longitudinal cross sectional view of essential part in the state that the circuit breaker of the Plug-In Circuit Breaker is plugged in the mounting base according to the first embodiment of this invention.
  • Fig. 6 is a top cross sectional view of essential part of the circuit breaker body viewed from a load side.
  • Fig. 7 is a bottom cross sectional view of essential part of the circuit breaker body viewed from a power supply side.
  • the arm 22c of the lever 22 comes to be engaged with the arm catching portion 8a formed at the plug-in base 8 and receives the force in a direction indicated by the arrow F5.
  • the proj ection 22d becomes released from the projection-engaging portion 25d, and the lever 22 turns by the bias force given by the helical spring 23.
  • the trip rod 21 moves in a direction indicated by the arrow F6, and then a tip portion 21b thereof acts on the intermediate actuator 15, which turns in a direction indicated by the arrow F7 about the shaft 15a as a fulcrum.
  • This turning of the intermediate actuator 15 causes the trip shaft 12 to turn in a direction indicated by the arrow F8, and causes the switch mechanism to operate to bring the switch contact into an open circuit resulting in interruption of a load current.
  • the lever 22 moves in a direction indicated by the arrow F9 (shown in Fig. 5 ) by the bias force given by the helical spring 23, and the protrusion 22e of the lever 22 comes in contact with the lever catching portion 8b formed at the plug-in base 7.
  • the connector 3 and the plug-in stud 10 are electrically connected by the connector 3 being inserted in a fitted manner after the connector 3 has been brought into contact with the plug-in stud 10, and the connector 3 and the plug-in stud 10 are held in contact under a predetermined contact pressure given by the pressure spring 2.
  • the lever catching portion 8b is pressed by the protrusion 22e of the lever 22, the lever 22 turns in a direction indicated by the arrow F10 (shown in Fig. 7 ) against the bias force given by the helical spring 23, and the trip rod 21 moves to such a position as not to act on the intermediate actuator 21 ( Figs. 5 through 7 ).
  • an alphabet letter c represents a distance between the centers of position of the pin 26 and the cylindrical part 22b; and an alphabet letter d represents a distance between the centers of position of the pin 26 and the protrusion 22e.
  • Relation between c and d is set to be d ⁇ c.
  • dimension of the projection 22d which is engaged with the proj ection-engaging portion 25d, is set to be a taper configuration of a ⁇ b, supposing that the dimension of the projection 22d on the side proximate to the position of the pin 26 is a and dimension thereof on the side remote from the position of the pin 26 is b.
  • the purpose of this setting is to make the projection 22d easily released from the proj ection-engaging portion 25d when pulling out the circuit breaker body 1, or to achieve a firm engagement of the projection 22d therewith.
  • a Plug-In Circuit Breaker according to the present invention is suitable for reliably bringing a switch contact into an open circuit when inserting or pulling a circuit breaker body in or out of a mounting base.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP02728105A 2002-05-22 2002-05-22 Insertion type circuit breaker Expired - Lifetime EP1507275B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/004943 WO2003098652A1 (fr) 2002-05-22 2002-05-22 Disjoncteur a insertion

Publications (3)

Publication Number Publication Date
EP1507275A1 EP1507275A1 (en) 2005-02-16
EP1507275A4 EP1507275A4 (en) 2008-03-26
EP1507275B1 true EP1507275B1 (en) 2011-02-02

Family

ID=29434528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02728105A Expired - Lifetime EP1507275B1 (en) 2002-05-22 2002-05-22 Insertion type circuit breaker

Country Status (6)

Country Link
EP (1) EP1507275B1 (enrdf_load_stackoverflow)
JP (1) JP4057010B2 (enrdf_load_stackoverflow)
CN (1) CN1302503C (enrdf_load_stackoverflow)
DE (1) DE60239108D1 (enrdf_load_stackoverflow)
TW (1) TWI222094B (enrdf_load_stackoverflow)
WO (1) WO2003098652A1 (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100349246C (zh) * 2005-09-07 2007-11-14 常州东方铁路器材有限公司 过电流断路器
US7517235B2 (en) 2006-12-28 2009-04-14 General Electric Company Press fit connection for mounting electrical plug-in outlet insulator to a busway aluminum housing
KR101087511B1 (ko) * 2009-05-21 2011-11-29 엘에스산전 주식회사 차단기의 인입출 인터록 장치
CN102129938B (zh) * 2010-01-12 2015-10-07 苏州中钻电气制造有限公司 断路器插入式接线装置
CN102445131B (zh) * 2011-11-24 2013-12-18 天津市百利电气有限公司 塑壳断路器的热脱扣器的检具及使用方法
US8649160B2 (en) 2012-02-07 2014-02-11 Eaton Corporation Plug-in circuit breaker assembly including insulative retainers
CN104241045B (zh) * 2013-06-18 2016-07-06 伊顿公司 用于断路器的安全保护装置
CN104701105B (zh) * 2015-03-05 2016-08-24 上海德布森电气有限公司 一种用于插入式断路器的安全脱扣辅助装置
CN108352278B (zh) * 2015-11-06 2020-02-28 万高电机及控制装置自动化有限公司 具有可插拔跳闸模块的断路器
WO2017184486A2 (en) * 2016-04-19 2017-10-26 Safran Electrical & Power Integral contact socket for plug-in circuit breakers
WO2017196923A1 (en) 2016-05-11 2017-11-16 Safran Electrical & Power Circuit breaker with press fit socket
US9818567B1 (en) * 2016-08-24 2017-11-14 Siemens Industry, Inc. Apparatus and method of reducing arcing between a circuit breaker line terminal and a panel board terminal
CN107978496A (zh) * 2017-12-23 2018-05-01 雅絮智能科技有限公司 一种具有插入式导电夹的小型断路器
CN110706983A (zh) * 2019-07-29 2020-01-17 华辉智能技术有限公司 一种可拆卸断路器锁止结构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690563B1 (fr) * 1992-04-23 1997-05-09 Merlin Gerin Disjoncteur debrochable a boitier moule.
JP2504683B2 (ja) * 1993-01-22 1996-06-05 寺崎電気産業株式会社 引出形回路遮断器
JP3399126B2 (ja) * 1994-12-28 2003-04-21 三菱電機株式会社 回路遮断器
DE29506151U1 (de) * 1995-04-08 1995-06-22 Klöckner-Moeller GmbH, 53115 Bonn Sicherungsvorrichtung für ein auf eine Montagefläche montierbares Schaltgerät mit Schaltschloß
JP3861401B2 (ja) * 1997-09-19 2006-12-20 富士電機機器制御株式会社 回路遮断器
CN1329747A (zh) * 1999-10-07 2002-01-02 三菱电机株式会社 插入式电路断路器

Also Published As

Publication number Publication date
EP1507275A4 (en) 2008-03-26
EP1507275A1 (en) 2005-02-16
JP4057010B2 (ja) 2008-03-05
JPWO2003098652A1 (ja) 2005-09-22
CN1302503C (zh) 2007-02-28
WO2003098652A1 (fr) 2003-11-27
TWI222094B (en) 2004-10-11
DE60239108D1 (enrdf_load_stackoverflow) 2011-03-17
CN1520602A (zh) 2004-08-11

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