JP2014127414A - Dc switch - Google Patents

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JP2014127414A
JP2014127414A JP2012285084A JP2012285084A JP2014127414A JP 2014127414 A JP2014127414 A JP 2014127414A JP 2012285084 A JP2012285084 A JP 2012285084A JP 2012285084 A JP2012285084 A JP 2012285084A JP 2014127414 A JP2014127414 A JP 2014127414A
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contact
movable contact
auxiliary electrode
fixed contact
movable
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Akikuni Kato
彰訓 加藤
Kazuki Ito
和記 伊藤
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Kawamura Electric Inc
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Kawamura Electric Inc
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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a DC switch equipped with a mechanism capable of effectively extinguishing an arc discharge without using a permanent magnet.SOLUTION: A DC switch has an auxiliary electrode 3 coupled to a fixed contactor 1a via a capacitor C and a parallel circuit of a resistor R. The auxiliary electrode 3 is arranged so as to come into contact with a movable contact point 2 in a contact state with a fixed contact point 1 in the vicinity of the fixed contact point 1, has a slide piece 3a which continues contact with the movable contact point 2 up to a state on the way the movable contact point 2 is detached from the fixed contact point 1, and is separated from the movable contact point 2 at the point of time when detachment operation is finished.

Description

本発明は、直流電路を開閉操作する直流開閉器に関する。   The present invention relates to a DC switch that opens and closes a DC circuit.

省エネルギーの観点から、また産業用太陽光発電の普及による発電電圧の高電圧化等から、直流高電圧配電（ＨＶＤＣ）が検討されている。
しかしながら、給電電圧が高くなると電路を開放する際に接点間にアーク放電が生じ易く、また消え難くなる。特に直流の場合、一度発生したアーク放電は消え難いため、開閉器においては交流に比べて消弧対策が重要となる。これは、交流では直流と異なり周期的に０Ｖの電位があるため発生したアーク放電は切れやすいが、直流では常に一定の電圧が加わることで一度発生したアーク放電は他の条件が変わらない限り切れない特性に依る。
そのため、直流電路に設置される開閉器には、開閉する接点を挟むように永久磁石を配置して、磁力によりアーク放電の形成経路を強制変更して消弧を促進させるよう構成したものがある。例えば特許文献１では、開極の際に生ずるアーク放電を挟むように永久磁石を対向させて配置すると共に、アーク放電の橋絡を阻止する消弧絶縁板を配置して、発生したアーク放電を強制的に伸張させることで比較的大電流でも遮断できるよう構成されている。 Direct current high voltage distribution (HVDC) has been studied from the viewpoint of energy saving and from the viewpoint of increasing the generated voltage by the spread of industrial solar power generation.
However, when the power supply voltage becomes high, arc discharge is likely to occur between the contacts when the circuit is opened, and it is difficult to eliminate. In particular, in the case of direct current, arc discharge once generated is difficult to extinguish. Therefore, in a switch, countermeasures for extinguishing arcs are more important than alternating current. This is because, unlike alternating current, direct current has a potential of 0V, so arc discharge that occurs is easily cut off, but in direct current, a constant voltage is always applied, and arc discharge once generated is interrupted unless other conditions change. Depends on no characteristics.
For this reason, some switches installed in the DC circuit have a configuration in which permanent magnets are arranged so as to sandwich the contacts to be opened and closed, and the arc discharge formation path is forcibly changed by magnetic force to promote arc extinction. . For example, in Patent Document 1, permanent magnets are arranged to face each other so as to sandwich arc discharge generated at the time of opening, and an arc extinguishing insulating plate that prevents bridging of arc discharge is arranged so that generated arc discharge is prevented. It is configured to be able to cut off even a relatively large current by forcibly extending.

特許第３３３４５２０号公報Japanese Patent No. 3334520

上記永久磁石を消弧室周囲に設置したものは、比較的大電流が流れる電路に対しても有効な構成であった。しかしながら、１接点部に対して少なくとも１つの永久磁石が必要であるため、そのためのスペースが必要となり、開閉器の小型化の障害となっていた。   What installed the said permanent magnet around the arc-extinguishing chamber was a structure effective also with respect to the electric circuit through which a comparatively large current flows. However, since at least one permanent magnet is required for one contact portion, a space for it is necessary, which has been an obstacle to miniaturization of the switch.

そこで、本発明はこのような問題点に鑑み、永久磁石を使用することなくアーク放電を効果的に消弧できる機構を備えた直流開閉器を提供することを目的としている。   Then, in view of such a problem, an object of the present invention is to provide a DC switch having a mechanism capable of effectively extinguishing arc discharge without using a permanent magnet.

上記課題を解決する為に、請求項１の発明は、固定接点を備えた固定接触子と可動接点を備えた可動接触子とを電路上に設けて、前記固定接点に対して可動接点を接触／解離動作させることで、前記電路の接続／遮断を実施する直流開閉器であって、前記固定接触子及び前記可動接触子の何れか一方とコンデンサ及び抵抗の並列回路を介して連結された補助電極を有し、前記補助電極は、前記固定接点の近傍において当該固定接点に接触状態にある前記可動接点に接触するよう配置されると共に、前記可動接点が前記固定接点から解離する途中まで前記可動接点との接触を継続するための摺動片を有し、解離動作が終了した時点で前記可動接点と分離されることを特徴とする。
この構成によれば、可動接点が解離動作すると接点間にアーク放電が発生するが、可動接点の解離が進み、固定接点と補助電極の距離より大きくなると、アーク放電は固定接点と補助電極との間に移行させることができる。その後、可動接点が補助電極から離れるが、アーク放電のエネルギーは補助電極と一方の接触子との間に設けられたコンデンサと抵抗の並列回路により吸収されるため、可動接点と補助電極の間で新たなアーク放電が発生することが無い。こうして、接点間で発生したアーク放電は継続することがなく速やかに消弧させることができる。よって、直流電路の遮断操作であっても、永久磁石を使用することなく省スペースでアークを消弧することが可能となる。 In order to solve the above-mentioned problem, the invention of claim 1 provides a fixed contact having a fixed contact and a movable contact having a movable contact on an electric circuit, and contacts the movable contact with the fixed contact. A DC switch for connecting / cutting off the electric circuit by causing a disengagement operation, and an auxiliary connected to either one of the fixed contact and the movable contact through a parallel circuit of a capacitor and a resistor The auxiliary electrode is disposed in contact with the movable contact in contact with the fixed contact in the vicinity of the fixed contact, and is movable until the movable contact is disengaged from the fixed contact. It has a sliding piece for continuing the contact with the contact, and is separated from the movable contact when the dissociation operation is completed.
According to this configuration, when the movable contact is dissociated, arc discharge occurs between the contacts. However, when the dissociation of the movable contact proceeds and becomes larger than the distance between the fixed contact and the auxiliary electrode, the arc discharge is generated between the fixed contact and the auxiliary electrode. Can be moved in between. After that, the movable contact is separated from the auxiliary electrode, but the arc discharge energy is absorbed by a parallel circuit of a capacitor and a resistor provided between the auxiliary electrode and one of the contacts, and therefore, between the movable contact and the auxiliary electrode. New arc discharge does not occur. Thus, the arc discharge generated between the contacts can be extinguished quickly without continuing. Therefore, even in the operation of interrupting the DC circuit, the arc can be extinguished in a space-saving manner without using a permanent magnet.

請求項２の発明は、固定接点を備えた固定接触子と可動接点を備えた可動接触子とを電路上に設けて、前記固定接点に対して可動接点を接触／解離動作させることで、前記電路の接続／遮断を実施する直流開閉器であって、前記固定接触子及び前記可動接触子の何れか一方とコンデンサ及び抵抗の並列回路を介して連結され、前記可動接点方向に付勢力を有する状態で前記固定接点と前記可動接点とで挟持される部位に配置された補助電極と、当該補助電極を前記固定接点に対して所定の距離で停止させるストッパと備え、前記補助接点が前記可動接点に接触した状態で前記可動接点は解離動作し、前記可動接点の解離動作の途中で前記補助電極は前記ストッパに係合して停止し、前記固定接点と前記可動接点の間の所定位置に保持されることを特徴とする。
この構成によれば、可動接点の解離が始まると、可動接点と固定接点とで挟持されている補助電極は、可動接点側に付勢されているため可動接点と一体に移動を開始する。そして、可動接点の解離が進む途中で補助電極がストッパと係合して停止し、可動接点と分離される。
そのため、可動接点の解離開始時は、補助電極と固定接点との間にアーク放電が発生するが、途中で可動接点が分離されることで、アーク放電のエネルギーは補助電極と一方の接触子の間に設けられたコンデンサと抵抗の並列回路により吸収される。また、可動接点と分離した補助電極との間で新たなアーク放電が発生することが無いため、接点間で発生したアーク放電は継続することがなく速やかに消弧させることができる。よって、直流電路の遮断操作であっても、永久磁石を使用することなく省スペースでアークを消弧することが可能となる。 According to a second aspect of the present invention, a fixed contact provided with a fixed contact and a movable contact provided with a movable contact are provided on an electric circuit, and the movable contact is brought into contact / dissociation operation with respect to the fixed contact. A DC switch for connecting / disconnecting an electric circuit, which is connected to one of the fixed contact and the movable contact through a parallel circuit of a capacitor and a resistor, and has a biasing force in the direction of the movable contact An auxiliary electrode disposed at a portion sandwiched between the fixed contact and the movable contact in a state, and a stopper for stopping the auxiliary electrode at a predetermined distance from the fixed contact, the auxiliary contact being the movable contact The movable contact is dissociated in contact with the movable contact, and the auxiliary electrode is engaged with the stopper and stopped during the disengagement operation of the movable contact, and is held at a predetermined position between the fixed contact and the movable contact. Be done The features.
According to this configuration, when the disengagement of the movable contact starts, the auxiliary electrode sandwiched between the movable contact and the fixed contact starts to move together with the movable contact because it is biased toward the movable contact. Then, while the dissociation of the movable contact proceeds, the auxiliary electrode engages with the stopper and stops and is separated from the movable contact.
Therefore, at the start of dissociation of the movable contact, arc discharge occurs between the auxiliary electrode and the fixed contact, but the energy of arc discharge is reduced between the auxiliary electrode and one of the contacts by separating the movable contact in the middle. It is absorbed by a parallel circuit of a capacitor and a resistor provided between them. In addition, since no new arc discharge occurs between the movable contact and the separated auxiliary electrode, the arc discharge generated between the contacts can be extinguished quickly without continuing. Therefore, even in the operation of interrupting the DC circuit, the arc can be extinguished in a space-saving manner without using a permanent magnet.

本発明によれば、接点間で発生するアーク放電のエネルギーはコンデンサと抵抗の並列回路により吸収されるため、発生したアーク放電は継続することがなく速やかに消弧させることができる。よって、直流電路の遮断操作であっても、永久磁石を使用することなく省スペースでアークを消弧することが可能となる。   According to the present invention, since the arc discharge energy generated between the contacts is absorbed by the parallel circuit of the capacitor and the resistor, the generated arc discharge can be quickly extinguished without continuing. Therefore, even in the operation of interrupting the DC circuit, the arc can be extinguished in a space-saving manner without using a permanent magnet.

本発明に係る直流開閉器の第１の形態を示す接点部の概略構成図であり、接点を接触させた状態の説明図である。It is a schematic block diagram of the contact part which shows the 1st form of the DC switch concerning this invention, and is explanatory drawing of the state which made the contact contact. 図１の接点の動作説明図であり、（ａ）は解離した直後の状態、（ｂ）は、解離が進み、アーク放電の向きが変化した状態、（ｃ）は解離が完了した状態を示している。FIG. 2 is an operation explanatory diagram of the contact of FIG. 1, (a) is a state immediately after dissociation, (b) is a state where dissociation proceeds and the direction of arc discharge is changed, and (c) is a state where dissociation is completed. ing. 直流開閉器の第２の形態を示す接点部の概略構成図であり、接点を解離させた状態の説明図である。It is a schematic block diagram of the contact part which shows the 2nd form of direct-current switch, and is explanatory drawing of the state which made the contact dissociate. 図３の接点の動作説明図であり、（ａ）は接触させた状態、（ｂ）は解離した直後の状態を示している。It is operation | movement explanatory drawing of the contact of FIG. 3, (a) is the contacted state, (b) has shown the state immediately after dissociation.

以下、本発明を具体化した実施の形態を、図面を参照して詳細に説明する。本発明は、可動接点或いは固定接点の近傍に補助電極を設けて、速やかなアーク放電の消弧を可能とするものであり、最初に可動接点に接触して摺動する補助電極を設けた構成を説明する。   DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. In the present invention, an auxiliary electrode is provided in the vicinity of a movable contact or a fixed contact to enable quick extinction of arc discharge, and a configuration in which an auxiliary electrode that first slides in contact with the movable contact is provided. Will be explained.

［第１の形態］
図１は本発明に係る直流開閉器の第１の形態を示す接点部の概略構成図であり、接点を接触させた閉路状態を示している。１は図示しない固定接触子に設けられた固定接点、２は図示しない可動接触子に設けられた可動接点、３は補助電極を示し、固定接点１と補助電極３とは並列に配置されたコンデンサＣと抵抗Ｒにより接続されている
補助電極３は、固定接点１の近傍に配置され、可動接点２の側部に当接して摺動する摺動片３ａを有している。この摺動片３ａは、可動接点２が固定接点１に接触している状態から、解離動作の途中まで接触するよう形成されている。 [First embodiment]
FIG. 1 is a schematic configuration diagram of a contact portion showing a first embodiment of a DC switch according to the present invention, and shows a closed state in which contacts are brought into contact. 1 is a fixed contact provided on a fixed contact (not shown), 2 is a movable contact provided on a movable contact (not shown), 3 is an auxiliary electrode, and the fixed contact 1 and the auxiliary electrode 3 are arranged in parallel. The auxiliary electrode 3 connected by C and the resistor R is disposed in the vicinity of the fixed contact 1 and has a sliding piece 3 a that slides in contact with the side of the movable contact 2. The sliding piece 3a is formed so as to contact from the state in which the movable contact 2 is in contact with the fixed contact 1 to the middle of the dissociation operation.

上記の如く構成された接点部の開操作時に発生するアーク放電は、以下のように消弧される。図２は、図１に示す接点の開動作説明図であり、（ａ）は解離した直後の状態、（ｂ）は、解離が進み、アークが変化した状態、（ｃ）は解離動作が終了した状態を示し、この図２を参照して説明する。
図２（ａ）に示すように、解離した直後は固定接点１と可動接点２との間（以下、単に接点間とする）でアーク放電Ｓが発生するが、解離が進むに従い接点間の距離が固定接点１と補助電極３の間の距離より長くなると、図２（ｂ）に示すようにアーク放電Ｓは固定接点１と補助電極３の間に移行する。 The arc discharge generated during the opening operation of the contact portion configured as described above is extinguished as follows. 2A and 2B are diagrams for explaining the opening operation of the contact shown in FIG. 1, where FIG. 2A is a state immediately after dissociation, FIG. 2B is a state where dissociation has progressed and the arc has changed, and FIG. This will be described with reference to FIG.
As shown in FIG. 2A, immediately after dissociation, arc discharge S occurs between the fixed contact 1 and the movable contact 2 (hereinafter, simply referred to as “between contacts”), but the distance between the contacts increases as dissociation proceeds. Becomes longer than the distance between the fixed contact 1 and the auxiliary electrode 3, the arc discharge S moves between the fixed contact 1 and the auxiliary electrode 3 as shown in FIG.

このアーク放電ＳのエネルギーはコンデンサＣに充電されるが、並列に配置されている抵抗Ｒにより消費され、アーク放電Ｓのエネルギーは順次削減される。この結果、解離が完了した図２（ｃ）の時点で、可動接点２が補助電極３から解離する際にアーク放電が発生するようなことが無く、その時点でアーク放電は消弧している。
具体的に、電圧４００Ｖの電路においては、一例としてコンデンサＣ＝１μＦ、抵抗Ｒ＝１ｋΩとすることで良好な消弧を実現できる。 The energy of the arc discharge S is charged in the capacitor C, but is consumed by the resistor R arranged in parallel, and the energy of the arc discharge S is sequentially reduced. As a result, when the dissociation is completed, the arc discharge is not generated when the movable contact 2 dissociates from the auxiliary electrode 3 at the time of FIG. 2C, and the arc discharge is extinguished at that time. .
Specifically, in an electric circuit with a voltage of 400 V, good arc extinction can be realized by setting a capacitor C = 1 μF and a resistance R = 1 kΩ as an example.

このように、電路に電流が流れている状態で可動接点２が解離動作すると、接点間にアーク放電が発生するが、可動接点２の解離が進み、固定接点１と補助電極３の距離より大きくなると、アーク放電は固定接点１と補助電極３との間に移行させることができる。その後、可動接点２が補助電極３から離れるが、アーク放電のエネルギーは補助電極３と固定接触子との間に設けられたコンデンサＣと抵抗Ｒの並列回路により吸収されるため、可動接点２と補助電極３の間で新たなアーク放電が発生することが無い。こうして、接点間で発生したアーク放電は継続することがなく速やかに消弧させることができる。よって、直流電路の遮断操作であっても、永久磁石を使用することなく省スペースでアークを消弧することが可能となる。   As described above, when the movable contact 2 is dissociated in a state where a current is flowing through the electric circuit, arc discharge occurs between the contacts, but the dissociation of the movable contact 2 proceeds and is larger than the distance between the fixed contact 1 and the auxiliary electrode 3. Thus, the arc discharge can be transferred between the fixed contact 1 and the auxiliary electrode 3. Thereafter, the movable contact 2 is separated from the auxiliary electrode 3, but the arc discharge energy is absorbed by the parallel circuit of the capacitor C and the resistor R provided between the auxiliary electrode 3 and the stationary contact. A new arc discharge does not occur between the auxiliary electrodes 3. Thus, the arc discharge generated between the contacts can be extinguished quickly without continuing. Therefore, even in the operation of interrupting the DC circuit, the arc can be extinguished in a space-saving manner without using a permanent magnet.

尚、コンデンサＣと抵抗Ｒを固定接点１と補助電極３の間に設けているが、この両者の間には設けずに可動接点２と補助電極３の間に設けても良い。   Although the capacitor C and the resistor R are provided between the fixed contact 1 and the auxiliary electrode 3, they may be provided between the movable contact 2 and the auxiliary electrode 3 without being provided between them.

次に、固定接点と可動接点に挟持される補助電極を設けた構成を説明する。
［第２の形態］
図３は直流開閉器の第２の形態を示す接点部の概略構成図であり、解離状態にある接点部を示している。１ａは固定接点１を先端に設けた固定接触子、２ａは可動接点２を先端に設けた可動接触子、４は補助接点、５は補助接点４に係合するストッパを示している。また、６ａ、６ｂはそれぞれの接触子１ａ，２ａに接続された電路を示している。 Next, the structure which provided the auxiliary electrode clamped by a fixed contact and a movable contact is demonstrated.
[Second form]
FIG. 3 is a schematic configuration diagram of a contact portion showing a second form of the DC switch, showing the contact portion in a dissociated state. Reference numeral 1 a denotes a fixed contact with a fixed contact 1 provided at the tip, 2 a a movable contact with a movable contact 2 provided at the tip, 4 an auxiliary contact, and 5 a stopper engaged with the auxiliary contact 4. Moreover, 6a, 6b has shown the electric circuit connected to each contactor 1a, 2a.

補助電極４は金属板で形成され、自身の弾性もしくはスプリングによって常時可動接点２の方向に付勢されている。そして、固定接点１との距離が所定の距離を超えないようストッパ５により移動距離が規制され、可動接点２が解離した状態では固定接点１及び可動接点２と所定の距離を保持するよう構成されている。また、可動接触子２ａとの間にコンデンサＣと抵抗Ｒの並列回路が接続されている。   The auxiliary electrode 4 is formed of a metal plate and is always urged in the direction of the movable contact 2 by its own elasticity or a spring. The moving distance is restricted by the stopper 5 so that the distance from the fixed contact 1 does not exceed a predetermined distance, and the fixed contact 1 and the movable contact 2 are held at a predetermined distance when the movable contact 2 is disengaged. ing. A parallel circuit of a capacitor C and a resistor R is connected between the movable contact 2a.

上記の如く構成された接点部の開操作時に発生するアーク放電は、以下のように消弧される。図４は図３に示す接点部の動作説明図であり、（ａ）は接点部を接触させた状態、（ｂ）は解離した直後の状態を示し、この図４を参照して説明する。
図４（ａ）に示すように、電路閉路中は可動接点２が補助電極４を介して固定接点１に接触している。そして、可動接点２が解離を開始すると、図４（ｂ）に示すように補助電極４もその付勢力により可動接点２と一体に動作する。その結果、固定接点１と補助電極４の間でアーク放電Ｓが発生する。 The arc discharge generated during the opening operation of the contact portion configured as described above is extinguished as follows. 4A and 4B are diagrams for explaining the operation of the contact portion shown in FIG. 3, wherein FIG. 4A shows a state in which the contact portion is brought into contact, and FIG. 4B shows a state immediately after dissociation.
As shown in FIG. 4A, the movable contact 2 is in contact with the fixed contact 1 via the auxiliary electrode 4 during the electric circuit closing. When the movable contact 2 starts to dissociate, the auxiliary electrode 4 also operates integrally with the movable contact 2 by its biasing force as shown in FIG. As a result, an arc discharge S is generated between the fixed contact 1 and the auxiliary electrode 4.

そして、解離が進むと補助電極４はストッパ５に係合して停止するが、可動接点２は解離動作を継続し、可動接点２と補助電極４は分離される。こうして分離されると、固定接点１と補助電極４との間で発生していたアーク放電のエネルギーはコンデンサＣに並列に設けられている抵抗Ｒにより消費されるため、新たに可動接点２と補助電極４の間でアーク放電が発生するようなことは無く、アーク放電は消滅する。
尚、ストッパ５は、解離が完了した時点で補助電極４が図３に示すように固定接点１と可動接点２との略中間位置となるよう配置されている。 As the dissociation proceeds, the auxiliary electrode 4 engages with the stopper 5 and stops, but the movable contact 2 continues the dissociation operation, and the movable contact 2 and the auxiliary electrode 4 are separated. When separated in this way, the arc discharge energy generated between the fixed contact 1 and the auxiliary electrode 4 is consumed by the resistor R provided in parallel with the capacitor C, so that the movable contact 2 and the auxiliary electrode are newly added. Arc discharge does not occur between the electrodes 4, and the arc discharge disappears.
Note that the stopper 5 is disposed so that the auxiliary electrode 4 is at a substantially intermediate position between the fixed contact 1 and the movable contact 2 as shown in FIG.

このように、電路に電流が流れている状態で接点間の解離が始まると、可動接点２と固定接点１とで挟持されている補助電極４は、可動接点２側に付勢されているため可動接点２と一体に移動を開始する。そして、可動接点２の解離が進む途中で補助電極４がストッパ５と係合して停止し、可動接点２と分離される。
そのため、可動接点２の解離開始時は、補助電極４と固定接点１との間にアーク放電が発生するが、途中で可動接点２が分離されることで、アーク放電のエネルギーは補助電極４と可動接触子２ａの間に設けられたコンデンサＣと抵抗Ｒの並列回路により吸収される。また、可動接点２と分離した補助電極４との間で新たなアーク放電が発生することが無いため、接点間で発生したアーク放電は継続することがなく速やかに消弧させることができる。よって、直流電路の遮断操作であっても、永久磁石を使用することなく省スペースでアークを消弧することが可能となる。 As described above, when dissociation between the contacts starts when a current is flowing through the electric circuit, the auxiliary electrode 4 sandwiched between the movable contact 2 and the fixed contact 1 is biased toward the movable contact 2. The movement starts together with the movable contact 2. Then, the auxiliary electrode 4 engages with the stopper 5 and stops while the dissociation of the movable contact 2 proceeds, and is separated from the movable contact 2.
Therefore, at the start of dissociation of the movable contact 2, arc discharge occurs between the auxiliary electrode 4 and the fixed contact 1, but when the movable contact 2 is separated in the middle, the energy of arc discharge is the same as that of the auxiliary electrode 4. It is absorbed by a parallel circuit of a capacitor C and a resistor R provided between the movable contacts 2a. Further, since no new arc discharge occurs between the movable contact 2 and the separated auxiliary electrode 4, the arc discharge generated between the contacts can be quickly extinguished without continuing. Therefore, even in the operation of interrupting the DC circuit, the arc can be extinguished in a space-saving manner without using a permanent magnet.

尚、この第２の形態においては、コンデンサＣと抵抗Ｒを可動接点２と補助電極４の間に設けているが、この両者の間には設けずに固定接点１と補助電極４の間に設けても良い。また、可動接点２を解離させる際、補助電極４が接触した状態の序盤の解離速度より、補助電極４がストッパ５に係合した後の可動接点２が単独で解離動作する終盤の解離速度をより早くすると消弧に有効である。このような解離動作は、可動接触子２ａを弾性部材の弾性を利用して開動作させることで容易に実施することができる。
また、第１及び第２の形態の双方とも、固定接点１をプラス極、可動接点２をマイナス極として、固定接点１から可動接点２へ電流が流れる構成としているが、開閉器内の対を成す他方の接点部も同様の構成とすれば良く、固定接点１及び可動接点２が逆の極性であっても良い。 In the second embodiment, the capacitor C and the resistor R are provided between the movable contact 2 and the auxiliary electrode 4, but not provided between the fixed contact 1 and the auxiliary electrode 4. It may be provided. Further, when the movable contact 2 is dissociated, the dissociation speed at the end stage in which the movable contact 2 after the auxiliary electrode 4 is engaged with the stopper 5 is dissociated from the dissociation speed at the beginning of the state in which the auxiliary electrode 4 is in contact. If it is earlier, it is effective for extinguishing the arc. Such dissociation operation can be easily performed by opening the movable contact 2a using the elasticity of the elastic member.
In both of the first and second embodiments, the fixed contact 1 is a positive pole and the movable contact 2 is a negative pole, and a current flows from the fixed contact 1 to the movable contact 2. The other contact portion formed may have the same configuration, and the fixed contact 1 and the movable contact 2 may have opposite polarities.

１・・固定接点、１ａ・・固定接触子、２・・可動接点、２ａ・・可動接触子、３・・補助電極、３ａ・・摺動片、４・・補助電極、５・・ストッパ、６ａ，６ｂ・・電路、Ｃ・・コンデンサ、Ｒ・・抵抗。   1 .... fixed contact, 1a ... fixed contact, 2 .... movable contact, 2a ... movable contact, 3 .... auxiliary electrode, 3a ... sliding piece, 4 .... auxiliary electrode, ..., stopper, 6a, 6b ... Electric circuit, C ... Capacitor, R ... Resistance.

Claims (2)

固定接点を備えた固定接触子と可動接点を備えた可動接触子とを電路上に設けて、前記固定接点に対して可動接点を接触／解離動作させることで、前記電路の接続／遮断を実施する直流開閉器であって、
前記固定接触子及び前記可動接触子の何れか一方とコンデンサ及び抵抗の並列回路を介して連結された補助電極を有し、
前記補助電極は、前記固定接点の近傍において当該固定接点に接触状態にある前記可動接点に接触するよう配置されると共に、前記可動接点が前記固定接点から解離する途中まで前記可動接点との接触を継続するための摺動片を有し、解離動作が終了した時点で前記可動接点と分離されることを特徴とする直流開閉器。 A fixed contact with a fixed contact and a movable contact with a movable contact are provided on the electric circuit, and the electric contact is connected / disconnected by moving / contacting the movable contact with the fixed contact. A DC switch that
An auxiliary electrode connected to either one of the fixed contact and the movable contact through a parallel circuit of a capacitor and a resistor;
The auxiliary electrode is arranged in contact with the movable contact in contact with the fixed contact in the vicinity of the fixed contact, and is in contact with the movable contact until the movable contact is dissociated from the fixed contact. A DC switch having a sliding piece for continuing, and being separated from the movable contact when the dissociation operation is completed. 固定接点を備えた固定接触子と可動接点を備えた可動接触子とを電路上に設けて、前記固定接点に対して可動接点を接触／解離動作させることで、前記電路の接続／遮断を実施する直流開閉器であって、
前記固定接触子及び前記可動接触子の何れか一方とコンデンサ及び抵抗の並列回路を介して連結され、前記可動接点方向に付勢力を有する状態で前記固定接点と前記可動接点とで挟持される部位に配置された補助電極と、当該補助電極を前記固定接点に対して所定の距離で停止させるストッパと備え、
前記補助接点が前記可動接点に接触した状態で前記可動接点は解離動作し、前記可動接点の解離動作の途中で前記補助電極は前記ストッパに係合して停止し、前記固定接点と前記可動接点の間の所定位置に保持されることを特徴とする直流開閉器。 A fixed contact with a fixed contact and a movable contact with a movable contact are provided on the electric circuit, and the electric contact is connected / disconnected by moving / contacting the movable contact with the fixed contact. A DC switch that
A portion that is connected to either one of the fixed contact and the movable contact through a parallel circuit of a capacitor and a resistor, and is sandwiched between the fixed contact and the movable contact in a state having an urging force in the movable contact direction. An auxiliary electrode disposed on the stopper and a stopper for stopping the auxiliary electrode at a predetermined distance from the fixed contact,
The movable contact is disengaged in a state where the auxiliary contact is in contact with the movable contact, and the auxiliary electrode is engaged with the stopper and stopped in the middle of the disengaging operation of the movable contact, and the fixed contact and the movable contact A DC switch characterized by being held at a predetermined position between.
JP2012285084A 2012-12-27 2012-12-27 Dc switch Pending JP2014127414A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5435376U (en) * 1977-08-15 1979-03-08
JPS5625424U (en) * 1980-07-30 1981-03-09
JPS57180023A (en) * 1981-04-29 1982-11-05 Mitsubishi Electric Corp Gas insulated disconnecting switch
JPS63187542U (en) * 1987-05-19 1988-12-01
JPH09320376A (en) * 1996-05-23 1997-12-12 Kawamura Electric Inc Switch for direct current
JP2010257808A (en) * 2009-04-27 2010-11-11 Haruko Amiya Knife switch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5435376U (en) * 1977-08-15 1979-03-08
JPS5625424U (en) * 1980-07-30 1981-03-09
JPS57180023A (en) * 1981-04-29 1982-11-05 Mitsubishi Electric Corp Gas insulated disconnecting switch
JPS63187542U (en) * 1987-05-19 1988-12-01
JPH09320376A (en) * 1996-05-23 1997-12-12 Kawamura Electric Inc Switch for direct current
JP2010257808A (en) * 2009-04-27 2010-11-11 Haruko Amiya Knife switch

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