JP2007234250A - Breaker tripping device - Google Patents

Breaker tripping device Download PDF

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Publication number
JP2007234250A
JP2007234250A JP2006051055A JP2006051055A JP2007234250A JP 2007234250 A JP2007234250 A JP 2007234250A JP 2006051055 A JP2006051055 A JP 2006051055A JP 2006051055 A JP2006051055 A JP 2006051055A JP 2007234250 A JP2007234250 A JP 2007234250A
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Japan
Prior art keywords
movable armature
armature
permanent magnet
slider
tripping
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JP2006051055A
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Japanese (ja)
Inventor
Takahiro Kudo
高裕 工藤
Yasuhiro Takahashi
康弘 高橋
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Fuji Electric FA Components and Systems Co Ltd
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Fuji Electric FA Components and Systems Co Ltd
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Application filed by Fuji Electric FA Components and Systems Co Ltd filed Critical Fuji Electric FA Components and Systems Co Ltd
Priority to JP2006051055A priority Critical patent/JP2007234250A/en
Priority to FR0701007A priority patent/FR2897979A1/en
Priority to CNB2007100858417A priority patent/CN100561631C/en
Priority to KR1020070019609A priority patent/KR100904469B1/en
Publication of JP2007234250A publication Critical patent/JP2007234250A/en
Withdrawn legal-status Critical Current

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    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/325—Housings, assembly or disposition of different elements in the housing
    • H01H71/326—Sealed housings
    • 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
    • H01H73/36—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 having electromagnetic release and no other automatic release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/128—Encapsulating, encasing or sealing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F7/1615—Armatures or stationary parts of magnetic circuit having permanent magnet
    • 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
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
    • H01H71/322—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with plunger type armature

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To restrain foreign matter from intruding in a pole-contact face between a movable armature and a fixed armature of a release type electromagnetic device. <P>SOLUTION: A breaker tripping device is composed so as to allow a trip mechanism to execute tripping operations by operating an electromagnet when an excessive load current or a leakage current flows into a main circuit. A telescopical member 12 telescopical corresponding to the protruding operation of the movable armature 6 is arranged so as to cover a tripping spring 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は遮断機の引外し装置に関し、特に、過負荷電流や漏洩電流が主回路に流れた時に電磁石を動作させ、トリップ機構に引外し動作を行わせる釈放形電磁装置に適用して好適なものである。   The present invention relates to a tripping device for a circuit breaker, and is particularly suitable for application to a release electromagnetic device in which an electromagnet is operated when an overload current or leakage current flows through a main circuit and a trip mechanism performs a tripping operation. Is.

従来から回路遮断器や漏洩遮断器には遮断機の引外し装置が設けられている。この遮断機の引外し装置は、主回路に流れた過負荷電流や漏洩電流などの異常電流を検知し、その時の検知信号に基づいて本体機構部を引外すことにより主回路を開路させることができる。そして、近年では、遮断機の引外し装置として、釈放形の電磁石が設けられた釈放形電磁装置を用いることが増えている。   Conventionally, circuit breakers and leakage circuit breakers have been provided with tripping devices for circuit breakers. This circuit breaker trip device detects an abnormal current such as an overload current or a leakage current flowing in the main circuit, and opens the main circuit by tripping the main body mechanism based on the detection signal at that time. it can. In recent years, a release type electromagnetic device provided with a release type electromagnet has been increasingly used as a tripping device for a circuit breaker.

図３は、従来の遮断機の引外し装置の概略構成を示す断面図である。
図３において、筐体２０２にはコイル部２０１が収容され、コイル部２０１には、係止部２０６ａが先端に設けられた可動接極子２０６が突出自在に挿通されている。そして、係止部２０６ａにて可動接極子２０６の突出方向に係止されたスライダ２０３が可動接極子２０６の突出方向にスライド自在に配置され、スライダ２０３は、固定リング２０７にて可動接極子２０６に固定されている。そして、コイル部２０１とスライダ２０３との間には、可動接極子２０６の突出方向にスライダ２０３を付勢する引外しばね２０５が介在されている。 FIG. 3 is a cross-sectional view showing a schematic configuration of a conventional tripping device for a circuit breaker.
In FIG. 3, a coil portion 201 is accommodated in a housing 202, and a movable armature 206 having a locking portion 206 a provided at the tip is inserted into the coil portion 201 so as to be freely protruded. The slider 203 locked in the protruding direction of the movable armature 206 by the locking portion 206 a is slidably arranged in the protruding direction of the movable armature 206, and the slider 203 is moved by the fixed ring 207. It is fixed to. A tripping spring 205 that biases the slider 203 in the protruding direction of the movable armature 206 is interposed between the coil unit 201 and the slider 203.

図４は、従来の釈放形電磁装置の概略構成を示す断面図である。
図４において、コイル用ボビン１０１にはコイル１０２が巻き回され、断面がコ字状に形成された継鉄１０３内に収容されている。そして、継鉄１０３上には、継鉄１０３の両脚に橋絡された継鉄片１０４が配置され、継鉄１０３の底には、厚さ方向に磁化された永久磁石１０５が配置されている。そして、永久磁石１０５上には、磁性材料からなる固定接極子１０７が設けられるとともに、コイル用ボビン１０１に挿通され、継鉄片１０４上に突出自在に構成された可動接極子１０６が固定接極子１０７と対向配置されている。ここで、可動接極子１０６とコイル用ボビン１０１との間には可動接極子１０６を突出自在に保持するガイド１１０が設けられている。また、可動接極子１０６の先端には、スライダを可動接極子１０６に係止させる係止部１０９が設けられ、継鉄片１０４と係止部１０９との間には、可動接極子１０６の突出方向Ａ２に可動接極子１０６を付勢する引外しばね１０８が介在されている。 FIG. 4 is a cross-sectional view showing a schematic configuration of a conventional release electromagnetic device.
In FIG. 4, a coil 102 is wound around a coil bobbin 101 and accommodated in a yoke 103 having a U-shaped cross section. A yoke piece 104 bridged by both legs of the yoke 103 is arranged on the yoke 103, and a permanent magnet 105 magnetized in the thickness direction is arranged on the bottom of the yoke 103. A fixed armature 107 made of a magnetic material is provided on the permanent magnet 105, and a movable armature 106 inserted into the coil bobbin 101 and protruding on the yoke piece 104 is a fixed armature 107. Are arranged opposite to each other. Here, a guide 110 is provided between the movable armature 106 and the coil bobbin 101 so as to hold the movable armature 106 in a projecting manner. Further, a locking portion 109 for locking the slider to the movable armature 106 is provided at the tip of the movable armature 106, and the protruding direction of the movable armature 106 is between the yoke piece 104 and the locking portion 109. A tripping spring 108 for biasing the movable armature 106 is interposed in A2.

ここで、永久磁石１０５は、可動接極子１０６の突出方向Ａ２と反対方向に吸引することで、引外しばね１０８のばね力に対抗して、突出方向Ａ２と反対方向に可動接極子１０６を引き戻そうとする。そして、可動接極子１０６の突出方向Ａ２と反対方向への永久磁石１０５の吸引力Ｆ１は、可動接極子１０６の突出方向Ａ２への引外しばね１０８のばね力Ｆ２より大きくなるように設定される。このため、主回路が閉路されている場合、コイル１０２への通電が遮断され、可動接極子１０６は固定接極子１０７と接極された状態に維持される。この場合、可動接極子１０６には（Ｆ１−Ｆ２）の保持余力がある。   Here, the permanent magnet 105 attracts the movable armature 106 in the direction opposite to the protruding direction A2, thereby pulling the movable armature 106 back in the direction opposite to the protruding direction A2 against the spring force of the tripping spring 108. I will try. The attractive force F1 of the permanent magnet 105 in the direction opposite to the protruding direction A2 of the movable armature 106 is set to be larger than the spring force F2 of the tripping spring 108 in the protruding direction A2 of the movable armature 106. . For this reason, when the main circuit is closed, the energization to the coil 102 is cut off, and the movable armature 106 is maintained in a state of being in contact with the fixed armature 107. In this case, the movable armature 106 has a holding capacity of (F1-F2).

そして、過負荷電流や漏洩電流などの異常電流が主回路に流れると、その異常電流が検知回路にて検知され、コイル１０２が通電される。そして、コイル１０２が通電されると、永久磁石１０５が発生する磁界に対して反磁界が形成され、永久磁石１０５の吸引力Ｆ１が小さくなって、引外しばね１０８のばね力Ｆ２が吸引力Ｆ１に打ち勝つようになるため、可動接極子１０６が突出方向Ａ２へ突出する。   When an abnormal current such as an overload current or a leakage current flows through the main circuit, the abnormal current is detected by the detection circuit, and the coil 102 is energized. When the coil 102 is energized, a demagnetizing field is formed with respect to the magnetic field generated by the permanent magnet 105, the attractive force F1 of the permanent magnet 105 decreases, and the spring force F2 of the tripping spring 108 becomes the attractive force F1. Therefore, the movable armature 106 protrudes in the protruding direction A2.

ここで、永久磁石１０５が吸引力Ｆ１を発生させる場合、磁束は永久磁石１０５→固定接極子１０７→可動接極子１０６→継鉄片１０４→継鉄１０３を通り、ルートＲＢ４を通過する。このため、永久磁石１０５が発生させる磁界に対しては、空隙Ｂ４１が磁束の通過の妨げとなる。また、コイル１０２が発生させる反磁界もルートＲＢ４を通過する。このため、コイル１０２が発生させる反磁界に対しては、空隙Ｂ４２が磁束の通過の妨げとなり、コイル１０２から見た磁気抵抗を増大させる。なお、図４の釈放形電磁装置は可動接極子１０６を中心として対象構造となっているため、片側のルートＲＢ４のみを示した。   Here, when the permanent magnet 105 generates the attractive force F1, the magnetic flux passes through the route RB4 through the permanent magnet 105 → the fixed armature 107 → the movable armature 106 → the yoke piece 104 → the yoke 103. For this reason, with respect to the magnetic field generated by the permanent magnet 105, the air gap B41 hinders the passage of magnetic flux. The demagnetizing field generated by the coil 102 also passes through the route RB4. For this reason, with respect to the demagnetizing field generated by the coil 102, the air gap B42 hinders the passage of magnetic flux, and increases the magnetic resistance viewed from the coil 102. 4 has a target structure centered on the movable armature 106, only the route RB4 on one side is shown.

また、例えば、特許文献１には、プランジャの傾きによる永久磁石の保持力の変化を防止して安定したプランジャの吸引状態が得られるようにするために、プランジャと固定鉄芯の接極面との間に非磁性体からなる接極スペーサを設ける方法が開示されている。
特開２００５−２６８０３１号公報 Further, for example, in Patent Document 1, in order to prevent a change in the holding force of the permanent magnet due to the inclination of the plunger and to obtain a stable plunger attracting state, the armature surface of the plunger and the fixed iron core A method of providing an armature spacer made of a non-magnetic material between the two is disclosed.
JP 2005-268031 A

しかしながら、従来の遮断機の引外し装置では、可動接極子１０６が突出方向Ａ２に突出した際に、遮断時に発生した煤や粉塵などが空隙Ｂ４１を介して内部に流入することがあった。このため、従来の遮断機の引外し装置では、可動接極子１０６と固定接極子１０７の接極面に異物が侵入し、永久磁石１０５による吸引力Ｆ１を低下させたり、振動や衝撃によって可動接極子１０６が誤って突出したりするという問題があった。
そこで、本発明の目的は、可動接極子と固定接極子の接極面に異物が侵入することを抑制することが可能な遮断機の引外し装置を提供することである。 However, in the conventional tripping device for a breaker, when the movable armature 106 protrudes in the protruding direction A2, soot and dust generated at the time of blocking may flow into the inside through the gap B41. For this reason, in the conventional tripping device for a breaker, foreign matter enters the armature surfaces of the movable armature 106 and the fixed armature 107, the attractive force F1 by the permanent magnet 105 is reduced, or the movable armature 106 is moved by vibration or impact. There was a problem that the pole 106 protruded accidentally.
SUMMARY OF THE INVENTION An object of the present invention is to provide a tripping device for a circuit breaker capable of suppressing foreign matter from entering the armature surfaces of a movable armature and a stationary armature.

上述した課題を解決するために、請求項１記載の遮断機の引外し装置によれば、所定方向に突出自在に保持された可動接極子と、前記可動接極子に対向配置された固定接極子と、前記可動接極子の先端に係止されたスライダと、前記可動接極子の突出方向に前記スライダを付勢する引外しばねと、前記引外しばねを蓄勢状態に保持する永久磁石と、前記可動接極子および前記固定接極子を通して前記永久磁石からの磁束の磁気経路を構成する継鉄と、異常電流の検知結果に基づいて、前記永久磁石による磁界に対する反磁界を形成する電磁石と、前記引外しばねを覆うように構成され、前記可動接極子の突出動作に応じて伸縮可能な伸縮部材とを備えることを特徴とする。   In order to solve the above-described problem, according to the tripping device for a circuit breaker according to claim 1, a movable armature that is held so as to protrude freely in a predetermined direction, and a fixed armature that is disposed to face the movable armature. A slider locked to the tip of the movable armature, a tripping spring that urges the slider in the protruding direction of the movable armature, and a permanent magnet that holds the tripping spring in a stored state. A yoke that forms a magnetic path of magnetic flux from the permanent magnet through the movable armature and the fixed armature, an electromagnet that forms a demagnetizing field against the magnetic field by the permanent magnet based on the detection result of the abnormal current, It is comprised so that a tripping spring may be covered, and it is provided with the expansion-contraction member which can be expanded-contracted according to the protrusion operation | movement of the said movable armature.

これにより、可動接極子の突出動作に影響を与えることなく、可動接極子の周囲を伸縮部材にて保護することができる。このため、可動接極子が突出した際に、遮断時に発生した煤や粉塵などが空隙を介して内部に流入することを防止することができ、永久磁石による吸引力の低下を防止することが可能となるとともに、振動や衝撃によって可動接極子が誤って突出することを防止することができ、引外し装置の信頼性を向上させることができる。   Thereby, the circumference | surroundings of a movable armature can be protected by an expansion-contraction member, without affecting the protrusion operation | movement of a movable armature. For this reason, when the movable armature protrudes, it is possible to prevent soot and dust generated at the time of interruption from flowing into the inside through the gap, and it is possible to prevent a reduction in the attractive force by the permanent magnet. In addition, it is possible to prevent the movable armature from being accidentally projected due to vibration or impact, and to improve the reliability of the tripping device.

また、請求項２記載の遮断機の引外し装置によれば、所定方向に突出自在に保持された可動接極子と、前記可動接極子に対向配置された固定接極子と、前記可動接極子の先端に係止されたスライダと、前記スライダ下の可動接極子の突出部分を覆うように構成され、前記可動接極子の突出方向に前記スライダを付勢するとともに、前記可動接極子の突出動作に応じて伸縮可能な伸縮部材と、前記伸縮部材を蓄勢状態に保持する永久磁石と、前記可動接極子および前記固定接極子を通して前記永久磁石からの磁束の磁気経路を構成する継鉄と、異常電流の検知結果に基づいて、前記永久磁石による磁界に対する反磁界を形成する電磁石とを備えることを特徴とする。   According to the tripping device for a circuit breaker according to claim 2, a movable armature held so as to be freely projectable in a predetermined direction, a fixed armature disposed opposite to the movable armature, and the movable armature The slider is configured to cover the slider locked at the tip and the protruding portion of the movable armature below the slider, and urges the slider in the protruding direction of the movable armature, and allows the movable armature to protrude. A telescopic member that can expand and contract in response, a permanent magnet that holds the telescopic member in a stored state, a yoke that forms a magnetic path of magnetic flux from the permanent magnet through the movable armature and the fixed armature, and abnormal And an electromagnet that forms a demagnetizing field with respect to the magnetic field of the permanent magnet based on a detection result of the current.

これにより、可動接極子の突出動作に影響を与えることなく、可動接極子の周囲を伸縮部材にて保護することが可能となるとともに、可動接極子の突出方向にスライダを伸縮部材にて付勢することができ、伸縮部材にて引外しばねを兼用することができる。このため、可動接極子の突出方向にスライダを付勢する引外しばねを不要として、コストアップを抑制することが可能となるとともに、可動接極子が突出した際に、遮断時に発生した煤や粉塵などが空隙を介して内部に流入することを防止することができ、引外し装置の信頼性を向上させることができる。
また、請求項３記載の遮断機の引外し装置によれば、前記伸縮部材は成型品であることを特徴とする。
これにより、伸縮部材のコストアップを抑制しつつ、信頼性の高い伸縮部材を形成することができる。 As a result, it is possible to protect the periphery of the movable armature with the elastic member without affecting the protruding operation of the movable armature, and urge the slider with the elastic member in the protruding direction of the movable armature. The tripping spring can also be used as the elastic member. This eliminates the need for a tripping spring that urges the slider in the direction in which the movable armature protrudes, thereby reducing the cost and reducing soot and dust generated when the movable armature protrudes. Or the like can be prevented from flowing into the interior through the gap, and the reliability of the tripping device can be improved.
According to a tripping device for a circuit breaker according to a third aspect of the present invention, the elastic member is a molded product.
Thereby, a highly reliable elastic member can be formed while suppressing the cost increase of the elastic member.

以上説明したように、本発明によれば、可動接極子が突出した際に、遮断時に発生した煤や粉塵などが空隙を介して内部に流入することを防止することができ、永久磁石による吸引力の低下を防止することが可能となるとともに、振動や衝撃によって可動接極子が誤って突出することを防止することができ、引外し装置の信頼性を向上させることができる。   As described above, according to the present invention, when the movable armature protrudes, it is possible to prevent soot and dust generated at the time of shutoff from flowing into the inside through the gap, and the attraction by the permanent magnet It is possible to prevent a decrease in force, and it is possible to prevent the movable armature from being accidentally projected due to vibration or impact, and to improve the reliability of the tripping device.

以下、本発明の実施形態に係る遮断機の引外し装置について図面を参照しながら説明する。
図１は、本発明の第１実施形態に係る遮断機の引外し装置の概略構成を示す断面図である。
図１において、コイル用ボビン１にはコイル２が巻き回され、断面がコ字状に形成された継鉄３内に収容されている。そして、継鉄３上には、継鉄３の両脚に橋絡された継鉄片４が配置され、継鉄３の底には、磁性材料からなる固定接極子１０が設けられている。なお、固定接極子１０は、かしめなどの方法にて継鉄３の底に固定することができる。また、コイル用ボビン１に挿通され、継鉄片４上に突出自在に構成された可動接極子６が固定接極子１０と対向配置されている。また、コイル用ボビン１下には、軸線方向に磁化された中空円筒形の永久磁石５が、固定接極子１０および可動接極子６の周囲に配置されている。ここで、コイル用ボビン１および永久磁石５と、可動接極子６との間には可動接極子６を突出自在に保持する中空円筒形のシリンダ７が設けられ、可動接極子６はシリンダ７を介して、コイル用ボビン１および永久磁石５に挿通されている。また、可動接極子６の先端には、スライダ９を可動接極子６に係止させる係止部６ａが設けられ、継鉄片４とスライダ９との間には、可動接極子６の突出方向Ａ１に可動接極子６を付勢する引外しばね８が介在されるとともに、スライダ９を押し戻すためのリセットばね１１が介在されている。さらに、引外しばね８の周囲には、可動接極子６の突出動作に応じて伸縮可能な伸縮部材１２が引外しばね８を覆うように配置されている。なお、伸縮部材１２は成型品にて構成することができる。 Hereinafter, a tripping device for a circuit breaker according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing a schematic configuration of a tripping device for a circuit breaker according to a first embodiment of the present invention.
In FIG. 1, a coil 2 is wound around a coil bobbin 1, and is housed in a yoke 3 having a U-shaped cross section. A yoke piece 4 bridged on both legs of the yoke 3 is arranged on the yoke 3, and a fixed armature 10 made of a magnetic material is provided on the bottom of the yoke 3. The fixed armature 10 can be fixed to the bottom of the yoke 3 by a method such as caulking. A movable armature 6 inserted into the coil bobbin 1 and configured to protrude on the yoke piece 4 is disposed opposite to the fixed armature 10. A hollow cylindrical permanent magnet 5 magnetized in the axial direction is disposed around the fixed armature 10 and the movable armature 6 below the coil bobbin 1. Here, a hollow cylindrical cylinder 7 is provided between the coil bobbin 1 and the permanent magnet 5 and the movable armature 6 so as to hold the movable armature 6 in a projecting manner. The coil bobbin 1 and the permanent magnet 5 are inserted therethrough. Further, a locking portion 6 a for locking the slider 9 to the movable armature 6 is provided at the tip of the movable armature 6, and the protruding direction A <b> 1 of the movable armature 6 is between the yoke piece 4 and the slider 9. In addition, a tripping spring 8 for biasing the movable armature 6 is interposed, and a reset spring 11 for pushing back the slider 9 is interposed. Furthermore, an expansion / contraction member 12 that can be expanded and contracted according to the protruding operation of the movable armature 6 is disposed around the trip spring 8 so as to cover the trip spring 8. In addition, the expansion-contraction member 12 can be comprised with a molded article.

ここで、永久磁石５は、可動接極子６の突出方向Ａ１と反対方向に吸引することで、引外しばね８のばね力に対抗して、突出方向Ａ１と反対方向に可動接極子６を引き戻そうとする。そして、可動接極子６の突出方向Ａ１と反対方向への永久磁石５の吸引力Ｆ１は、可動接極子６の突出方向Ａ１への引外しばね８のばね力Ｆ２より大きくなるように設定される。このため、主回路が閉路されている場合、コイル２への通電が遮断され、可動接極子６は固定接極子１０と接極された状態に維持される。この場合、可動接極子６には（Ｆ１−Ｆ２）の保持余力がある。   Here, the permanent magnet 5 is attracted in the direction opposite to the protruding direction A1 of the movable armature 6 and thereby pulls back the movable armature 6 in the direction opposite to the protruding direction A1 against the spring force of the tripping spring 8. I will try. The attractive force F1 of the permanent magnet 5 in the direction opposite to the protruding direction A1 of the movable armature 6 is set to be larger than the spring force F2 of the tripping spring 8 in the protruding direction A1 of the movable armature 6. . For this reason, when the main circuit is closed, the energization to the coil 2 is cut off, and the movable armature 6 is maintained in a state of being in contact with the fixed armature 10. In this case, the movable armature 6 has a holding capacity of (F1-F2).

そして、過負荷電流や漏洩電流などの異常電流が主回路に流れると、その異常電流が検知回路にて検知され、コイル２が通電される。そして、コイル２が通電されると、永久磁石５が発生する磁界に対して反磁界が形成され、永久磁石５の吸引力Ｆ１が小さくなって、引外しばね８のばね力Ｆ２が吸引力Ｆ１に打ち勝つようになるため、可動接極子６が突出方向Ａ１へ突出する。   When an abnormal current such as an overload current or a leakage current flows through the main circuit, the abnormal current is detected by the detection circuit, and the coil 2 is energized. When the coil 2 is energized, a demagnetizing field is formed with respect to the magnetic field generated by the permanent magnet 5, the attractive force F1 of the permanent magnet 5 is reduced, and the spring force F2 of the trip spring 8 is the attractive force F1. Therefore, the movable armature 6 projects in the projecting direction A1.

ここで、引外しばね８の周囲に伸縮部材１２を設けることにより、可動接極子６の突出動作に影響を与えることなく、可動接極子６の周囲を伸縮部材１２にて保護することができる。このため、可動接極子６が突出した際に、遮断時に発生した煤や粉塵などが空隙Ｃ１１を介して内部に流入することを防止することができ、永久磁石５による吸引力の低下を防止することが可能となるとともに、振動や衝撃によって可動接極子６が誤って突出することを防止することができ、引外し装置の信頼性を向上させることができる。   Here, by providing the expansion / contraction member 12 around the tripping spring 8, the periphery of the movable armature 6 can be protected by the expansion / contraction member 12 without affecting the protruding operation of the movable armature 6. For this reason, when the movable armature 6 protrudes, it is possible to prevent soot and dust generated at the time of shut-off from flowing into the inside via the gap C11 and to prevent a reduction in the attractive force by the permanent magnet 5. In addition, it is possible to prevent the movable armature 6 from being accidentally protruded by vibration or impact, and to improve the reliability of the tripping device.

なお、永久磁石５が吸引力Ｆ１を発生させる場合、磁束は永久磁石５→継鉄３→固定接極子１０→可動接極子６を通り、ルートＲＢ１を通過する。このため、永久磁石５が発生させる磁界に対しては、空隙Ｂ１１が磁束の通過の妨げとなる。一方、コイル２が発生させる反磁界は、固定接極子１０７→可動接極子１０６→継鉄片１０４→継鉄１０３を通り、ルートＲＣ１を通過する。このため、コイル２が発生させる反磁界に対しては、空隙Ｃ１１が磁束の通過の妨げとなる。なお、図１の釈放形電磁装置は可動接極子６を中心として対象構造となっているため、片側のルートＲＢ１、ＲＣ１のみを示した。   When the permanent magnet 5 generates the attractive force F1, the magnetic flux passes through the route RB1 through the permanent magnet 5, the yoke 3, the fixed armature 10, the movable armature 6. For this reason, with respect to the magnetic field generated by the permanent magnet 5, the air gap B11 hinders the passage of the magnetic flux. On the other hand, the demagnetizing field generated by the coil 2 passes through the route RC1 through the fixed armature 107 → the movable armature 106 → the yoke piece 104 → the yoke 103. For this reason, with respect to the demagnetizing field generated by the coil 2, the air gap C11 hinders the passage of magnetic flux. Since the release electromagnetic device of FIG. 1 has a target structure centered on the movable armature 6, only the routes RB1 and RC1 on one side are shown.

図２は、本発明の第２実施形態に係る遮断機の引外し装置の概略構成を示す断面図である。
図２において、コイル用ボビン２１にはコイル２２が巻き回され、断面がコ字状に形成された継鉄内に収容されている。そして、継鉄２３上には、継鉄２３の両脚に橋絡された継鉄片２４が配置され、継鉄２３の底には、磁性材料からなる固定接極子３０が設けられている。なお、固定接極子３０は、かしめなどの方法にて継鉄２３の底に固定することができる。また、コイル用ボビン２１に挿通され、継鉄片２４上に突出自在に構成された可動接極子２６が固定接極子３０と対向配置されている。また、コイル用ボビン２１下には、軸線方向に磁化された中空円筒形の永久磁石２５が、固定接極子３０および可動接極子２６の周囲に配置されている。ここで、可動接極子２６とコイル用ボビン２１および永久磁石２５との間には、可動接極子２６を突出自在に保持する中空円筒形のシリンダ２７が設けられ、可動接極子２６はシリンダ２７を介して、コイル用ボビン２１および永久磁石２５に挿通されている。また、可動接極子２６の先端には、スライダ２９を可動接極子２６に係止させる係止部２６ａが設けられ、継鉄片２４とスライダ２９との間には、スライダ２９を押し戻すためのリセットばね３１が介在されている。さらに、継鉄片２４とスライダ２９との間には、スライダ２９下の可動接極子２６の突出部分を覆うように構成され、可動接極子２６の突出方向にスライダ２９を付勢するとともに、可動接極子２６の突出動作に応じて伸縮可能な伸縮部材３２が設けられている。なお、伸縮部材３２は成型品にて構成することができる。 FIG. 2 is a sectional view showing a schematic configuration of a tripping device for a circuit breaker according to a second embodiment of the present invention.
In FIG. 2, a coil 22 is wound around a coil bobbin 21 and is housed in a yoke having a U-shaped cross section. A yoke piece 24 bridged by both legs of the yoke 23 is arranged on the yoke 23, and a fixed armature 30 made of a magnetic material is provided on the bottom of the yoke 23. The fixed armature 30 can be fixed to the bottom of the yoke 23 by a method such as caulking. A movable armature 26 inserted into the coil bobbin 21 and configured to protrude on the yoke piece 24 is disposed opposite to the fixed armature 30. A hollow cylindrical permanent magnet 25 magnetized in the axial direction is disposed around the fixed armature 30 and the movable armature 26 under the coil bobbin 21. Here, a hollow cylindrical cylinder 27 is provided between the movable armature 26 and the coil bobbin 21 and the permanent magnet 25 so as to hold the movable armature 26 in a projecting manner. The coil bobbin 21 and the permanent magnet 25 are inserted therethrough. A locking portion 26 a for locking the slider 29 to the movable armature 26 is provided at the tip of the movable armature 26, and a reset spring for pushing back the slider 29 between the yoke piece 24 and the slider 29. 31 is interposed. Further, the yoke piece 24 and the slider 29 are configured so as to cover the protruding portion of the movable armature 26 below the slider 29. The slider 29 is urged in the protruding direction of the movable armature 26 and the movable armature 26 is moved. An expansion / contraction member 32 that can expand and contract in accordance with the protruding operation of the pole element 26 is provided. In addition, the expansion-contraction member 32 can be comprised with a molded article.

これにより、可動接極子２６の突出動作に影響を与えることなく、可動接極子２６の周囲を伸縮部材３２にて保護することが可能となるとともに、可動接極子２６の突出方向にスライダ２９を伸縮部材３２にて付勢することができ、伸縮部材３２にて引外しばねを兼用することができる。このため、可動接極子２６の突出方向にスライダ２９を付勢するための引外しばねを不要として、コストアップを抑制することが可能となるとともに、可動接極子２６が突出した際に、遮断時に発生した煤や粉塵などが空隙を介して内部に流入することを防止することができ、引外し装置の信頼性を向上させることができる。   As a result, the surroundings of the movable armature 26 can be protected by the elastic member 32 without affecting the protruding operation of the movable armature 26, and the slider 29 can be expanded and contracted in the protruding direction of the movable armature 26. The member 32 can be urged, and the elastic member 32 can also serve as a tripping spring. This eliminates the need for a tripping spring for urging the slider 29 in the protruding direction of the movable armature 26, thereby suppressing an increase in cost, and when the movable armature 26 protrudes, The generated soot and dust can be prevented from flowing into the inside through the gap, and the reliability of the tripping device can be improved.

本発明の第１実施形態に係る遮断機の引外し装置の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the tripping device of the circuit breaker which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る遮断機の引外し装置の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the tripping device of the circuit breaker concerning 2nd Embodiment of this invention. 従来の遮断機の引外し装置の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the tripping device of the conventional circuit breaker. 従来の釈放形電磁装置の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the conventional release electromagnetic device.

符号の説明Explanation of symbols

１、２１ コイル用ボビン
２、２２ コイル
３、２３ 継鉄
４、２４ 継鉄片
５、２５ 永久磁石
６、２６ 可動接極子
６ａ、２６ａ 係止部
７、２７ シリンダ
８ 引外しばね
９、２９ スライダ
１０、３０ 固定接極子
１１、３１ リセットばね
１２、３２ 伸縮部材 1,21 Coil bobbin 2,22 Coil 3,23 yoke 4,24 yoke piece 5,25 permanent magnet 6,26 movable armature 6a, 26a locking portion 7,27 cylinder 8 tripping spring 9,29 slider 10 , 30 Fixed armature 11, 31 Reset spring 12, 32 Extendable member

Claims (3)

所定方向に突出自在に保持された可動接極子と、
前記可動接極子に対向配置された固定接極子と、
前記可動接極子の先端に係止されたスライダと、
前記可動接極子の突出方向に前記スライダを付勢する引外しばねと、
前記引外しばねを蓄勢状態に保持する永久磁石と、
前記可動接極子および前記固定接極子を通して前記永久磁石からの磁束の磁気経路を構成する継鉄と、
異常電流の検知結果に基づいて、前記永久磁石による磁界に対する反磁界を形成する電磁石と、
前記引外しばねを覆うように構成され、前記可動接極子の突出動作に応じて伸縮可能な伸縮部材とを備えることを特徴とする遮断機の引外し装置。 A movable armature held so as to protrude freely in a predetermined direction;
A fixed armature disposed opposite to the movable armature;
A slider locked to the tip of the movable armature;
A tripping spring for urging the slider in the protruding direction of the movable armature;
A permanent magnet for holding the tripping spring in a stored state;
A yoke constituting a magnetic path of magnetic flux from the permanent magnet through the movable armature and the fixed armature;
Based on the detection result of the abnormal current, an electromagnet that forms a demagnetizing field with respect to the magnetic field by the permanent magnet;
A tripping device for a circuit breaker, comprising: a telescopic member configured to cover the tripping spring and capable of expanding and contracting in accordance with a protruding operation of the movable armature. 所定方向に突出自在に保持された可動接極子と、
前記可動接極子に対向配置された固定接極子と、
前記可動接極子の先端に係止されたスライダと、
前記スライダ下の可動接極子の突出部分を覆うように構成され、前記可動接極子の突出方向に前記スライダを付勢するとともに、前記可動接極子の突出動作に応じて伸縮可能な伸縮部材と、
前記伸縮部材を蓄勢状態に保持する永久磁石と、
前記可動接極子および前記固定接極子を通して前記永久磁石からの磁束の磁気経路を構成する継鉄と、
異常電流の検知結果に基づいて、前記永久磁石による磁界に対する反磁界を形成する電磁石とを備えることを特徴とする遮断機の引外し装置。 A movable armature held so as to protrude freely in a predetermined direction;
A fixed armature disposed opposite to the movable armature;
A slider locked to the tip of the movable armature;
An elastic member configured to cover a protruding portion of the movable armature under the slider, urging the slider in a protruding direction of the movable armature, and capable of expanding and contracting according to a protruding operation of the movable armature;
A permanent magnet for holding the elastic member in a stored state;
A yoke constituting a magnetic path of magnetic flux from the permanent magnet through the movable armature and the fixed armature;
An apparatus for tripping a circuit breaker, comprising: an electromagnet that forms a demagnetizing field against a magnetic field generated by the permanent magnet based on an abnormal current detection result. 前記伸縮部材は成型品であることを特徴とする請求項１または２記載の遮断機の引外し装置。   The tripping device for a circuit breaker according to claim 1 or 2, wherein the elastic member is a molded product.
JP2006051055A 2006-02-27 2006-02-27 Breaker tripping device Withdrawn JP2007234250A (en)

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JP2006051055A JP2007234250A (en) 2006-02-27 2006-02-27 Breaker tripping device
FR0701007A FR2897979A1 (en) 2006-02-27 2007-02-13 Electric circuit-breaker triggering device for use in trigger type electromagnetic device, has flexible component recovering trigger spring, and extending and contracting based on displacement of projection of plunger
CNB2007100858417A CN100561631C (en) 2006-02-27 2007-02-26 The trip release device of circuit-breaker
KR1020070019609A KR100904469B1 (en) 2006-02-27 2007-02-27 Trip release device of an electric circuit breaker

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CN113332130A (en) * 2021-06-08 2021-09-03 吉林大学 Female genital organ nursing and cleaning device

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CN100561631C (en) 2009-11-18
KR20070089091A (en) 2007-08-30

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