JP2016035807A - Switchgear - Google Patents
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- JP2016035807A JP2016035807A JP2014157471A JP2014157471A JP2016035807A JP 2016035807 A JP2016035807 A JP 2016035807A JP 2014157471 A JP2014157471 A JP 2014157471A JP 2014157471 A JP2014157471 A JP 2014157471A JP 2016035807 A JP2016035807 A JP 2016035807A
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- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 abstract description 28
- 230000000694 effects Effects 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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Abstract
Description
本発明は、電流を遮断するスイッチ、開閉器、遮断器、電磁接触器、および継電器等を含む開閉装置に関する。 The present invention relates to a switchgear including a switch, a switch, a circuit breaker, an electromagnetic contactor, a relay, and the like that cut off current.
従来、開閉装置においては、接点間に発生したアークを引き伸ばしてアーク抵抗を高め、アーク電圧を高電圧化して電流を遮断している。特に直流用開閉装置では、電源電圧よりアーク電圧を高くし、電流零点を発生させて遮断する必要があるため、アークを引き伸ばす技術は重要である。特許文献１では、永久磁石の磁力線をアークに鎖交させ、アークにローレンツ力を作用させることにより、アークを引き伸ばしている。 Conventionally, in a switchgear, the arc generated between the contacts is stretched to increase the arc resistance, and the arc voltage is increased to cut off the current. In particular, in a DC switchgear, it is necessary to make the arc voltage higher than the power supply voltage and generate a current zero point to cut off, so the technique for extending the arc is important. In Patent Document 1, the arc is stretched by interlinking the magnetic field lines of the permanent magnet with the arc and applying a Lorentz force to the arc.
上記のような開閉装置においては、通電方向が逆になるとアークの駆動方向が逆転するため、遮断信頼性が低下するという問題がある。また、アークが逆方向に駆動した場合でも遮断できるように消弧空間を拡げると、装置が大型化する。 In the switchgear as described above, there is a problem that the interruption reliability is lowered because the arc driving direction is reversed when the energization direction is reversed. Moreover, if the arc extinguishing space is expanded so that the arc can be cut off even when the arc is driven in the reverse direction, the apparatus becomes larger.
また、上記のような開閉装置では、アークに所望のローレンツ力を作用させるために、ローレンツ力の作用面に対して一様な方向の磁力線を作用させる必要がある。アークに対して一様な方向の磁力線を鎖交させるためには、ローレンツ力の作用面よりも永久磁石の磁極面を大きくしなければならず、磁石の大型化によるコスト上昇および装置の大型化という問題が発生する。 Moreover, in the switchgear as described above, in order to apply a desired Lorentz force to the arc, it is necessary to apply a line of magnetic force in a uniform direction to the working surface of the Lorentz force. In order to link magnetic field lines in a uniform direction with respect to the arc, the magnetic pole surface of the permanent magnet must be made larger than the working surface of the Lorentz force. The problem occurs.
また、従来の永久磁石を搭載した開閉装置の多くは、アークを永久磁石の磁極面より外側まで引き伸ばしているが、永久磁石の磁極面に対向しないアークには磁気駆動作用が働き難くなる。さらに、永久磁石の磁極面に対向しない箇所に位置するアークに対しては、永久磁石から生成される磁力線が予期しない向きのローレンツ力を生じさせるため、遮断の信頼性が低下し、最悪の場合は遮断不能となる問題がある。 In many of the conventional switchgears equipped with permanent magnets, the arc is extended to the outside of the magnetic pole surface of the permanent magnet. However, the magnetic drive action is difficult to act on the arc not facing the magnetic pole surface of the permanent magnet. Furthermore, for arcs that are located at locations that do not face the magnetic pole surface of the permanent magnet, the magnetic lines of force generated from the permanent magnet cause an unexpected Lorentz force, which reduces the reliability of interruption and is the worst case. Has the problem of being unable to shut off.
一方、永久磁石からの磁力線を永久磁石の磁極面より外側まで形成させる手段として、磁気ヨークを用いることがある。しかし、永久磁石からの磁力線によって生じるローレンツ力は、電流の向きが変わると逆方向に作用するため、逆接接続すると遮断が困難となり事故の原因となる。このような事故を避けるためには、電流の向きが逆転してアークが逆方向に動いても十分に伸張できる磁気ヨークを搭載しなければならず、装置が大型化するという問題がある。 On the other hand, a magnetic yoke may be used as a means for forming magnetic lines of force from the permanent magnet to the outside of the magnetic pole surface of the permanent magnet. However, the Lorentz force generated by the lines of magnetic force from the permanent magnet acts in the opposite direction when the direction of the current is changed. In order to avoid such an accident, it is necessary to mount a magnetic yoke that can sufficiently expand even if the direction of the current is reversed and the arc moves in the reverse direction, and there is a problem that the apparatus becomes large.
本発明は、上記のような課題を解決するためになされたものであり、電流の向きに関係なく、また装置を大型化することなく、遮断信頼性の高い開閉装置を得ることを目的とする。 The present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain a switchgear with high shutoff reliability regardless of the direction of current and without increasing the size of the device. .
本発明に係る開閉装置は、固定接点を有する固定接触子、可動接点を有する可動接触子、固定接点と可動接点との開閉動作を行う開閉機構部、固定接点と可動接点の開離時に固定接触子と可動接触子の間で発生するアークを伸張させる磁界を発生させる磁石、一方の端部が磁石の磁極面に接合され他方の端部がアークの発生領域に近接して配置される長尺状の磁性体を備え、固定接触子、可動接触子、磁石および磁性体は、絶縁性の筐体の内部に配置され、磁石および磁性体のいずれか一方または両方の少なくとも一部は、筐体で覆われているものである。 The switchgear according to the present invention includes a fixed contact having a fixed contact, a movable contact having a movable contact, an opening / closing mechanism for performing an opening / closing operation between the fixed contact and the movable contact, and a fixed contact when the fixed contact and the movable contact are separated. A magnet that generates a magnetic field that stretches an arc generated between a child and a movable contact, and one end is joined to the magnetic pole surface of the magnet, and the other end is disposed close to the arc generation region A stationary contact, a movable contact, a magnet and a magnetic body are arranged inside an insulating casing, and at least a part of either or both of the magnet and the magnetic body is a casing. It is covered with.
本発明によれば、固定接触子と可動接触子の間で発生したアークを磁性体の側面に沿って磁石の方向へ向かって伸張することができると共に、磁石および磁性体のいずれか一方または両方の少なくとも一部を覆う絶縁性の筐体によりアークを圧縮しアーク内部の抵抗を高めることができるため、電流の向きに関係なく、また装置を大型化することなく、消弧性能を向上させることができ、遮断信頼性の高い開閉装置を得ることが可能である。 According to the present invention, an arc generated between a fixed contact and a movable contact can be extended toward the direction of the magnet along the side surface of the magnetic body, and either or both of the magnet and the magnetic body can be extended. The arc can be compressed and the resistance inside the arc can be increased by an insulating casing covering at least a part of the arc, so that the arc extinguishing performance can be improved regardless of the direction of current and without increasing the size of the device. Therefore, it is possible to obtain a switchgear with high shutoff reliability.
実施の形態１．
以下に、本発明の実施の形態１に係る開閉装置について、図面に基づいて説明する。図１（ａ）は、本実施の形態１に係る開閉装置の開極状態における消弧室の要部構成を示す側断面図、図１（ｂ）は、図１（ａ）中、Ｂ−Ｂ’で示す部分の断面図、図１（ｃ）は、図１（ａ）中、Ｃ−Ｃ’で示す部分の断面図である。なお、各図において、同一部分には同一符号を付している。
Embodiment 1 FIG.
Hereinafter, the switchgear according to Embodiment 1 of the present invention will be described with reference to the drawings. Fig.1 (a) is a sectional side view which shows the principal part structure of the arc-extinguishing chamber in the opening state of the switchgear concerning this Embodiment 1, FIG.1 (b) is B- in FIG.1 (a). FIG. 1C is a cross-sectional view of a portion indicated by B ′, and FIG. 1C is a cross-sectional view of a portion indicated by CC ′ in FIG. In the drawings, the same parts are denoted by the same reference numerals.
図１（ａ）に示すように、本実施の形態１に係る開閉装置１００は、固定接点１ａを有する固定接触子１と、固定接点１ａに接離する可動接点２ａを有し回動可能に設けられた可動接触子２を備えている。固定接点１ａと可動接点２ａとの開閉動作は、開閉機構部３のハンドル３ａによって行われる。 As shown in FIG. 1 (a), the switchgear 100 according to the first embodiment has a fixed contact 1 having a fixed contact 1a and a movable contact 2a contacting and separating from the fixed contact 1a so as to be rotatable. A movable contact 2 is provided. The opening / closing operation of the fixed contact 1a and the movable contact 2a is performed by the handle 3a of the opening / closing mechanism 3.
また、開閉装置１００は、固定接点１ａと可動接点２ａの開離時に固定接触子１と可動接触子２の間で発生するアークを伸張させる磁界を発生させる磁石４と、長尺状の磁性体である吸引棒５を備えている。吸引棒５の一方の端部５ａは、磁石４の磁極面に接合されており、他方の端部５ｂはアークの発生領域に近接して配置される。吸引棒５の形状は特に限定されるものではなく、円筒状、直方体状、または多角柱状等であっても良い。 In addition, the switching device 100 includes a magnet 4 that generates a magnetic field that extends an arc generated between the fixed contact 1 and the movable contact 2 when the fixed contact 1a and the movable contact 2a are separated, and a long magnetic body. The suction rod 5 is provided. One end portion 5a of the suction bar 5 is joined to the magnetic pole surface of the magnet 4, and the other end portion 5b is arranged close to the arc generation region. The shape of the suction bar 5 is not particularly limited, and may be a cylindrical shape, a rectangular parallelepiped shape, a polygonal column shape, or the like.
固定接触子１、可動接触子２、磁石４および吸引棒５等の消弧部品と開閉機構部３の一部は、絶縁性の筐体１０の内部に配置され、開閉装置１００の外部と隔離されている。筐体１０は、図１（ｂ）および図１（ｃ）に示すように、ケース１０ａとケースカバー１０ｂから構成される。ケース１０ａ内部の所定位置に消弧部品を配置、固定した後、ケースカバー１０ｂで蓋をする。なお、ケース１０ａとケースカバー１０ｂの材質は、いずれも絶縁性であるが同じである必要はなく、開閉装置１００の仕様に応じて決定される。例えばケースカバー１０ｂの材料として、低コスト材料や高強度材料を用いることができる。 The arc extinguishing parts such as the stationary contact 1, the movable contact 2, the magnet 4, and the suction bar 5 and a part of the opening / closing mechanism 3 are disposed inside the insulating housing 10 and isolated from the outside of the opening / closing device 100. Has been. The housing 10 includes a case 10a and a case cover 10b as shown in FIGS. 1 (b) and 1 (c). After the arc-extinguishing component is arranged and fixed at a predetermined position inside the case 10a, the case cover 10b is covered. The materials of the case 10a and the case cover 10b are both insulative but need not be the same, and are determined according to the specifications of the switchgear 100. For example, a low-cost material or a high-strength material can be used as the material for the case cover 10b.
筐体１０の両端部には、外部の電力回路と接続される固定側端子部１１および可動側端子部１２が設置される。固定接触子１は固定側端子部１１と一体的に形成され、可動接触子２は、開閉機構部３および可とう導体７を介して可動側端子部１２に接続されている。 A fixed terminal portion 11 and a movable terminal portion 12 connected to an external power circuit are installed at both ends of the housing 10. The fixed contact 1 is formed integrally with the fixed side terminal portion 11, and the movable contact 2 is connected to the movable side terminal portion 12 via the opening / closing mechanism portion 3 and the flexible conductor 7.
また、筐体１０内部の下方には、アークを消弧するための消弧室１３（図１（ａ）中、点線で囲んだ部分）が設けられる。消弧室１３は、吸引棒５が設置されるアーク伸張空間部を備えており、吸引棒５の端部５ｂはアークの発生領域に近接して配置される。消弧室１３に設置された磁石４は、固定接点１ａと可動接点２ａとの開離時に固定接触子１と可動接触子２の間で発生するアーク（図１（ａ）中、Ａで示す）を伸張させるための磁界を発生させる。 Further, an arc extinguishing chamber 13 for extinguishing the arc (a portion surrounded by a dotted line in FIG. 1A) is provided below the inside of the housing 10. The arc extinguishing chamber 13 includes an arc extension space where the suction bar 5 is installed, and the end 5b of the suction bar 5 is disposed close to the arc generation region. The magnet 4 installed in the arc extinguishing chamber 13 is an arc (indicated as A in FIG. 1A) generated between the fixed contact 1 and the movable contact 2 when the fixed contact 1a and the movable contact 2a are separated. ) To generate a magnetic field for stretching.
磁石４の一方の磁極面には、吸引棒５の一方の端部５ａが面接合により固定されている。また、磁石４の他方の磁極面には、磁性体からなる磁気補強板６が設けられている。固定接触子１と可動接触子２の間で発生したアークは、磁石４により発生した磁界によって吸引棒５の側面の長手方向に沿って磁石４の方向に向かって伸張される。 One end 5a of the suction bar 5 is fixed to one magnetic pole surface of the magnet 4 by surface bonding. A magnetic reinforcing plate 6 made of a magnetic material is provided on the other magnetic pole surface of the magnet 4. The arc generated between the fixed contact 1 and the movable contact 2 is extended toward the magnet 4 along the longitudinal direction of the side surface of the suction bar 5 by the magnetic field generated by the magnet 4.
さらに、本実施の形態１に係る開閉装置１００は、磁石４および吸引棒５のいずれか一方または両方の少なくとも一部が、筐体１０で覆われるように配置される。図１に示す例では、磁石４および吸引棒５の下面はケース１０ａで覆われ、磁石４の側面および吸引棒５の側面の一部はケース１０ａとケースカバー１０ｂで覆われている。なお、磁石４および吸引棒５の筐体１０で覆われている部分は、筐体１０と接触していても良いし、接触していなくても良い。 Furthermore, the opening / closing device 100 according to the first embodiment is arranged such that at least a part of one or both of the magnet 4 and the suction bar 5 is covered with the housing 10. In the example shown in FIG. 1, the lower surfaces of the magnet 4 and the suction bar 5 are covered with a case 10a, and the side surface of the magnet 4 and a part of the side surface of the suction bar 5 are covered with a case 10a and a case cover 10b. In addition, the part covered with the housing | casing 10 of the magnet 4 and the attraction | suction stick | rod 5 may be in contact with the housing | casing 10, and does not need to contact.
本実施の形態１に係る開閉装置１００におけるアークの消弧動作について、図２を用いて説明する。図２（ａ）〜図２（ｅ）は、永久磁石４１および吸引棒５を備えた開閉装置におけるアークの消弧に至る進展段階を５段階で示している。図２において、吸引棒５の一方の端部は、Ｎ極を持つ永久磁石４１の磁極面に面接合されている。ここでは永久磁石４１を用いているが、磁石４を用いた場合の消弧動作も同様である。 An arc extinguishing operation in switchgear 100 according to Embodiment 1 will be described with reference to FIG. FIG. 2A to FIG. 2E show five stages of progress leading to arc extinction in the switchgear including the permanent magnet 41 and the attraction bar 5. In FIG. 2, one end of the attraction bar 5 is surface-bonded to the magnetic pole surface of a permanent magnet 41 having an N pole. Although the permanent magnet 41 is used here, the arc extinguishing operation when the magnet 4 is used is the same.
なお、図２に示すモデルでは、吸引棒５は絶縁カバー５ｃで覆われており、絶縁カバー５ｃは、紙面手前に通電方向を持つアークの発生領域に対向するように設けられている。本実施の形態１に係る開閉装置１００においては、吸引棒５は絶縁カバー５ｃの代わりに絶縁性の筐体１０で覆われており、絶縁カバー５ｃと同様の作用を筐体１０により得るものである。 In the model shown in FIG. 2, the suction bar 5 is covered with an insulating cover 5c, and the insulating cover 5c is provided so as to face an arc generation region having a current-carrying direction in front of the page. In the opening / closing device 100 according to the first embodiment, the suction rod 5 is covered with the insulating casing 10 instead of the insulating cover 5c, and the casing 10 obtains the same action as the insulating cover 5c. is there.
図２（ａ）に示す消弧の進展段階においては、永久磁石４１から発生する磁力線Ｍが吸引棒５により誘導され、吸引棒５の先端からアークに向かって、アークへの鎖交磁場が発生するようになる。図中、Ａはアークおよびその電流方向を示している。鎖交磁場によりアークにローレンツ力（図中、矢印Ｌで示す）が作用し、アークは図２の下側方向に駆動される。 In the arc extinguishing stage shown in FIG. 2 (a), the magnetic field lines M generated from the permanent magnet 41 are induced by the attracting rod 5, and a linkage magnetic field to the arc is generated from the tip of the attracting rod 5 toward the arc. To come. In the figure, A indicates the arc and its current direction. A Lorentz force (indicated by an arrow L in the figure) acts on the arc by the interlinkage magnetic field, and the arc is driven in the lower direction in FIG.
続いて、図２（ｂ）に示す消弧の進展段階において、図２（ａ）の段階で駆動されたアークに、吸引棒５の先端から永久磁石４１のＳ極側に回り込むように形成される磁力線Ｍが鎖交するようになる。この鎖交磁場により吸引棒５の長手方向の側面部分に拡がるアーク伸張空間にアークは引きこまれる。 Subsequently, in the arc extinguishing progress stage shown in FIG. 2B, the arc driven in the stage of FIG. 2A is formed so as to wrap around from the tip of the attracting rod 5 to the S pole side of the permanent magnet 41. Magnetic field lines M are interlinked. By this interlinkage magnetic field, the arc is drawn into the arc extension space that extends to the side surface portion of the suction bar 5 in the longitudinal direction.
次に、図２（ｃ）に示す消弧の進展段階において、アーク伸張空間に引きこまれたアークは、吸引棒５の側面から法線上に発生する磁力線Ｍにより、さらに永久磁石４１の方向（図中、右側）に引きこまれる。アークが引きこまれるほど、吸引棒５の側面から発生する磁場強度が高まり、アークは吸引棒５からの脱離が困難となるため、アークを安定して永久磁石４１の方向に伸張させることができる。また、永久磁石４１の方向に引きこまれたアークに鎖交する磁力線には、永久磁石４１のＳ極側に回り込む磁力線が多く含まれるようになり、この右側方向の磁力線による鎖交磁場はアークを吸引棒５の内側に引き寄せ
る力を引き起す。
Next, in the arc extinguishing progress stage shown in FIG. 2 (c), the arc drawn into the arc extension space is further directed in the direction of the permanent magnet 41 (by the magnetic lines M generated on the normal line from the side surface of the attracting rod 5 ( It is drawn to the right side in the figure. As the arc is drawn, the strength of the magnetic field generated from the side surface of the attracting rod 5 increases, and the arc becomes difficult to detach from the attracting rod 5, so that the arc can be stably extended in the direction of the permanent magnet 41. it can. In addition, the magnetic field lines interlinked with the arc drawn in the direction of the permanent magnet 41 include a lot of magnetic field lines that wrap around the S pole side of the permanent magnet 41, and the interlinkage magnetic field generated by the magnetic field lines in the right direction is the arc. This causes a force to pull in the inside of the suction bar 5.
続いて、図２（ｄ）に示す消弧の進展段階において、吸引棒５を保護する絶縁カバー５ｃに近接したアークには、さらに強い力で吸引棒５の内側に押し込むローレンツ力が作用するようになる。これによりアークは、絶縁カバー５ｃに向かって圧縮され、アーク内部の抵抗が急激に高まる。 Subsequently, in the arc extinguishing stage shown in FIG. 2D, the Lorentz force that pushes the inside of the suction bar 5 with a stronger force acts on the arc in the vicinity of the insulating cover 5c that protects the suction bar 5. become. As a result, the arc is compressed toward the insulating cover 5c, and the resistance inside the arc is rapidly increased.
最後に、図２（ｅ）に示す消弧の進展段階において、絶縁カバー５ｃの一部に図に示すような凹状の細隙５ｄを設けた場合には、吸引棒５の内側に押し込むローレンツ力により細隙５ｄ内にアークが引き込まれアークが細く収縮するようになる。さらに、絶縁カバー５ｃを溶発性の樹脂材料で形成した場合には、収縮したアークの周囲から絶縁カバー５ｃによる溶発ガスが吹き付けられ、アーク内部でその導電性を維持できなくなるまで抵抗が高まり、消弧に至る。 Finally, in the arc extinguishing stage shown in FIG. 2 (e), when a concave slit 5d as shown in the figure is provided in a part of the insulating cover 5c, the Lorentz force pushed into the suction bar 5 is pushed. As a result, the arc is drawn into the slit 5d and the arc contracts thinly. Further, when the insulating cover 5c is formed of a fusible resin material, the resistance increases until the ablated gas from the insulating cover 5c is blown from around the contracted arc, and the conductivity cannot be maintained inside the arc. , Leading to arc extinction.
なお、図２において、通電方向が逆の場合、または永久磁石４１の磁極面の向きが逆の場合であっても、それぞれの消弧の進展段階において吸引棒５の軸で対称となるようにアークが伸張され、同様の効果が得られる。永久磁石４１を用いた場合、アークに一定磁束を作用することができるため、通電導体から発生する磁束が例えば１ｋＡ未満の弱い電流領域であっても安定した遮断を行うことができる。 In FIG. 2, even when the energization direction is reversed or when the direction of the magnetic pole surface of the permanent magnet 41 is reversed, the axis of the suction bar 5 is symmetric with respect to each arc extinguishing stage. The arc is stretched and the same effect is obtained. When the permanent magnet 41 is used, a constant magnetic flux can be applied to the arc, so that stable interruption can be performed even in a weak current region where the magnetic flux generated from the conducting conductor is, for example, less than 1 kA.
また、磁石４あるいは永久磁石４１の代わりに、吸引棒５の一部を電磁石として使用することもできる。固定接触子１および可動接触子２の一方、または外部電源のいずれかと電気的に接続されたコイル状の導体を、吸引棒５の一部に巻き付けることにより、吸引棒５の一部が電磁石となる。このような電磁石を使用した場合においても同様に、アークを消弧することができる。 Further, instead of the magnet 4 or the permanent magnet 41, a part of the attraction bar 5 can be used as an electromagnet. A coiled conductor electrically connected to either one of the fixed contact 1 and the movable contact 2 or an external power source is wound around a part of the suction bar 5, so that a part of the suction bar 5 is connected to the electromagnet. Become. Similarly, when such an electromagnet is used, the arc can be extinguished.
なお、永久磁石４１を使用した場合と、電磁石を使用した場合とでは、効果が最も発揮される電流範囲が異なる。永久磁石４１を使用する場合は、上述のように、例えば１ｋＡ未満の比較的弱い電流領域で効果を発揮するのに対し、電磁石を使用する場合は、導体に流れる電流から発生する磁束が大きくなる例えば１ｋＡ以上の比較的大きい電流領域で効果を発揮する。 It should be noted that the current range in which the effect is most exhibited differs between the case where the permanent magnet 41 is used and the case where the electromagnet is used. When the permanent magnet 41 is used, the effect is exhibited in a relatively weak current region of, for example, less than 1 kA, as described above. On the other hand, when the electromagnet is used, the magnetic flux generated from the current flowing through the conductor increases. For example, the effect is exhibited in a relatively large current region of 1 kA or more.
以上のように、本実施の形態１に係る開閉装置１００は、消弧室１３のアーク伸張空間部に、磁石４と、磁石４の一方の磁極面に接合された吸引棒５を配置し、固定接触子１と可動接触子２の間で発生したアークを吸引棒５の側面に沿って磁石４の方向へ伸張するようにしたので、電流の向きに関係なく、アークを急速に冷却することができる。また、磁石４の他方の磁極面に、磁性体からなる磁気補強板６を設けることにより、吸引棒５を介して磁石４の周囲を周回する磁力線が形成する磁気回路の磁気抵抗が低下するため、吸引棒５の表面から発生する磁場強度が高まり、消弧性能が向上する。 As described above, the switchgear 100 according to the first embodiment arranges the magnet 4 and the attraction bar 5 joined to one magnetic pole surface of the magnet 4 in the arc extension space of the arc extinguishing chamber 13, Since the arc generated between the stationary contact 1 and the movable contact 2 extends in the direction of the magnet 4 along the side surface of the suction bar 5, the arc can be cooled rapidly regardless of the direction of the current. Can do. Further, by providing the magnetic reinforcing plate 6 made of a magnetic material on the other magnetic pole surface of the magnet 4, the magnetic resistance of the magnetic circuit formed by the lines of magnetic force that circulate around the magnet 4 via the attraction bar 5 is reduced. The strength of the magnetic field generated from the surface of the suction bar 5 is increased, and the arc extinguishing performance is improved.
また、磁石４および吸引棒５の少なくとも一部を絶縁性の筐体１０で覆うことにより、アークを圧縮しアーク内部の抵抗を高めることができるため、消弧性能がさらに向上する。なお、本実施の形態１では、磁石４および吸引棒５の一部が筐体１０で覆われている例を示したが、磁石４および吸引棒５のいずれか一方のみが筐体１０で覆われている場合でも同様の効果が得られる。例えば磁石４だけが筐体１０で覆われている場合であっても、アークは最終的に磁石４の側面まで伸張されるため、筐体１０による圧縮効果および冷却効果が得られる。 Moreover, by covering at least a part of the magnet 4 and the attraction bar 5 with the insulating housing 10, the arc can be compressed and the resistance inside the arc can be increased, so that the arc extinguishing performance is further improved. In the first embodiment, the magnet 4 and the suction rod 5 are partially covered with the housing 10. However, only one of the magnet 4 and the suction rod 5 is covered with the housing 10. The same effect can be obtained even if For example, even when only the magnet 4 is covered with the housing 10, the arc is finally extended to the side surface of the magnet 4, so that the compression effect and the cooling effect by the housing 10 can be obtained.
本実施の形態１に係る開閉装置１００によれば、電流の向きに関係なく、また、磁石の大型化や消弧空間の拡大により装置を大型化することなく、消弧性能を向上させることができ、高い遮断信頼性を確保することが可能である。また、比較的小さい磁石でもアークを吸引するための磁力線を生成することができるため、磁石の配置が容易であると共に低コストで製造することができる。 According to the switchgear 100 according to the first embodiment, it is possible to improve the arc extinguishing performance regardless of the direction of the current and without increasing the size of the device by increasing the size of the magnet or expanding the arc-extinguishing space. It is possible to ensure high shutoff reliability. Moreover, since a magnetic force line for attracting an arc can be generated even with a relatively small magnet, the magnet can be easily arranged and manufactured at a low cost.
実施の形態２．
図３は、本発明の実施の形態２に係る開閉装置の開極状態における消弧室の要部構成を示す側断面図である。なお、図３中、図１と同一、相当部分には同一符号を付し、説明を省略する。本実施の形態２に係る開閉装置１００Ａは、上記実施の形態１に係る開閉装置１００と同様の構成を有し、さらに、ケース１０ａのアークの発生領域に対向する部分に、凹凸部８を有するものである。これにより、筐体１０によるアーク圧縮範囲がさらに拡張され、アークの伸張量が増加し、アーク冷却効率が向上する。
Embodiment 2. FIG.
FIG. 3 is a side cross-sectional view showing the main configuration of the arc extinguishing chamber in the open state of the switchgear according to Embodiment 2 of the present invention. In FIG. 3, the same reference numerals are assigned to the same or corresponding parts as in FIG. The switchgear 100A according to the second embodiment has the same configuration as that of the switchgear 100 according to the first embodiment, and further has a concavo-convex portion 8 in a portion facing the arc generation region of the case 10a. Is. Thereby, the arc compression range by the housing 10 is further expanded, the amount of arc extension is increased, and the arc cooling efficiency is improved.
なお、図３では、ケース１０ａのアーク発生領域に対向する部分に凹凸部８を設けたが、凹凸部８をケースカバー１０ｂに設けても良い。本実施の形態２によれば、上記実施の形態１よりもさらに遮断性能が向上する。 In FIG. 3, the concavo-convex portion 8 is provided in the portion of the case 10a facing the arc generation region, but the concavo-convex portion 8 may be provided in the case cover 10b. According to the second embodiment, the blocking performance is further improved as compared with the first embodiment.
実施の形態３．
図４は、本発明の実施の形態３に係る開閉装置の開極状態における消弧室の要部構成を示す側断面図である。なお、図４中、図１と同一、相当部分には同一符号を付し、説明を省略する。本実施の形態３に係る開閉装置１００Ｂは、上記実施の形態２に係る開閉装置１００Ａと同様の構成を有し、さらに、筐体１０のアークの発生領域の近傍に、排気口９を有するものである。
Embodiment 3 FIG.
FIG. 4 is a side cross-sectional view showing the main configuration of the arc extinguishing chamber in the open state of the switchgear according to Embodiment 3 of the present invention. 4 that are the same as or equivalent to those in FIG. 1 are assigned the same reference numerals, and descriptions thereof are omitted. The switchgear 100B according to the third embodiment has the same configuration as the switchgear 100A according to the second embodiment, and further has an exhaust port 9 in the vicinity of the arc generation region of the housing 10. It is.
なお、図４に示す開閉装置１００Ｂは、ケース１０ａに凹凸部８を有しているが、凹凸部８を設けず排気口９だけを設けても良い。排気口９を設けることにより、排気口９の周囲でガス流が生じるため、このガス流を利用してアークを伸張させることができる。また、電流遮断時に発生する金属煤または炭化煤等を、排気口９から外部に放出することができるため、耐電圧性能の劣化を抑制することができる。 4 has the concavo-convex portion 8 in the case 10a, the concavo-convex portion 8 may not be provided, but only the exhaust port 9 may be provided. By providing the exhaust port 9, a gas flow is generated around the exhaust port 9, so that the arc can be extended using this gas flow. Moreover, since metal soot or carbonized soot generated at the time of current interruption can be discharged to the outside from the exhaust port 9, deterioration of the withstand voltage performance can be suppressed.
本実施の形態３によれば、上記実施の形態２よりもアークを伸張させやすくなり、遮断性能がさらに向上する。なお、本発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略したりすることが可能である。 According to the third embodiment, it becomes easier to extend the arc than in the second embodiment, and the interruption performance is further improved. It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.
本発明は、電流を遮断するスイッチ、開閉器、遮断器、電磁接触器、および継電器等を含む開閉装置として利用することができる。 The present invention can be used as a switchgear including a switch, a switch, a circuit breaker, a magnetic contactor, a relay, and the like that cut off current.
１ 固定接触子、１ａ 固定接点、２ 可動接触子、２ａ 可動接点、
３ 開閉機構部、３ａ ハンドル、４ 磁石、５ 吸引棒、５ａ、５ｂ 端部、
５ｃ 絶縁カバー、５ｄ 細隙、６ 磁気補強板、７ 可とう導体、８ 凹凸部、
９ 排気口、１０ 筐体、１０ａ ケース、１０ｂ ケースカバー、
１１ 固定側端子部、１２ 可動側端子部、１３ 消弧室、４１ 永久磁石、
１００、１００Ａ、１００Ｂ 開閉装置。
1 fixed contact, 1a fixed contact, 2 movable contact, 2a movable contact,
3 Opening / closing mechanism, 3a handle, 4 magnet, 5 suction rod, 5a, 5b end,
5c Insulation cover, 5d slit, 6 magnetic reinforcing plate, 7 flexible conductor, 8 uneven part,
9 exhaust port, 10 housing, 10a case, 10b case cover,
11 fixed terminal part, 12 movable terminal part, 13 arc extinguishing chamber, 41 permanent magnet,
100, 100A, 100B Opening and closing device.
Claims (5)
前記固定接触子、前記可動接触子、前記磁石および前記磁性体は、絶縁性の筐体の内部に配置され、前記磁石および前記磁性体のいずれか一方または両方の少なくとも一部は、前記筐体で覆われていることを特徴とする開閉装置。 A fixed contact having a fixed contact, a movable contact having a movable contact, an opening / closing mechanism for performing an opening / closing operation between the fixed contact and the movable contact, the fixed contact and the movable contact when the fixed contact and the movable contact are separated A magnet that generates a magnetic field that stretches an arc generated between movable contacts, a long shape in which one end is joined to the magnetic pole surface of the magnet and the other end is disposed close to the arc generation region With a magnetic body
The fixed contact, the movable contact, the magnet, and the magnetic body are disposed inside an insulating casing, and at least a part of one or both of the magnet and the magnetic body is the casing. Opening and closing device characterized by being covered with.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102542180B1 (en) * | 2022-03-30 | 2023-06-14 | 오성기전 주식회사 | Arc extinguish device of DC circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618913U (en) * | 1984-06-21 | 1986-01-20 | 富士電機株式会社 | DC magnetic contactor |
| JP2012199137A (en) * | 2011-03-22 | 2012-10-18 | Panasonic Corp | Relay device |
| JP2012256453A (en) * | 2011-06-07 | 2012-12-27 | Fujitsu Component Ltd | Electromagnetic relay |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618913U (en) * | 1984-06-21 | 1986-01-20 | 富士電機株式会社 | DC magnetic contactor |
| JP2012199137A (en) * | 2011-03-22 | 2012-10-18 | Panasonic Corp | Relay device |
| JP2012256453A (en) * | 2011-06-07 | 2012-12-27 | Fujitsu Component Ltd | Electromagnetic relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102542180B1 (en) * | 2022-03-30 | 2023-06-14 | 오성기전 주식회사 | Arc extinguish device of DC circuit breaker |
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