JPH0883534A - Changeover switch - Google Patents
Changeover switchInfo
- Publication number
- JPH0883534A JPH0883534A JP6242283A JP24228394A JPH0883534A JP H0883534 A JPH0883534 A JP H0883534A JP 6242283 A JP6242283 A JP 6242283A JP 24228394 A JP24228394 A JP 24228394A JP H0883534 A JPH0883534 A JP H0883534A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- movable
- fixed
- load side
- fixed contact
- 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.)
- Granted
Links
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は常用電源と予備電源とを
切換える切換開閉器に関し、特に配電線の短絡事故時に
おける短時間電流・短絡投入電流特性及び遮断特性の改
良を行なうと共にシステム全体をコンパクト化した切換
開閉器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching switch for switching between a regular power supply and a standby power supply, and more particularly to improving short-time current / short-circuit making current characteristics and interruption characteristics at the time of a short-circuit accident of a distribution line and improving the entire system. The present invention relates to a compact switchgear.
【０００２】[0002]
【従来の技術】従来、この種の切換開閉器として実公昭
４０−１７１４９号公報、特公昭６１−４２３７０号公
報、特公昭６１−１８５７号公報とに開示されるものが
ある。これらに示される従来の切換開閉器を図５ないし
図７に示す。図５は従来の切換開閉器における接触子の
詳細構成図、図６は従来の切換開閉器における接触子の
動作態様図、図７は従来の安全保護システムの概略構成
図を示す。2. Description of the Related Art Conventionally, there have been disclosed switching switches of this type in JP-B-40-17149, JP-B-61-42370, and JP-B-61-1857. The conventional switching switches shown therein are shown in FIGS. FIG. 5 is a detailed configuration diagram of a contact in a conventional switching switch, FIG. 6 is an operation mode diagram of the contact in a conventional switching switch, and FIG. 7 is a schematic configuration diagram of a conventional safety protection system.
【０００３】一般的に、配電線の短絡事故時において
は、切換開閉器が投入状態のときに負荷側に事故が発生
して短絡電流（過大電流）が短時間通電される場合と、
切換開閉器が開放状態のときに負荷側に短絡事故が発生
してこの事故回路を投入する場合がある。このような短
絡電流（過大電流）通電時においては、接触子が通電電
流の電磁力により反跳し、場合により接点の溶着又は開
閉器の爆発等が発生することがある。Generally, at the time of a short circuit of a distribution line, when a failure occurs on the load side and a short circuit current (excess current) is supplied for a short time when the switching switch is in the closed state,
When the switching switch is in the open state, a short circuit accident may occur on the load side and this accident circuit may be closed. When such a short-circuit current (excess current) is applied, the contact may recoil due to the electromagnetic force of the applied current, and in some cases welding of contacts or explosion of a switch may occur.
【０００４】この短絡事故時に対応したものとして、前
記図５（Ａ）、（Ｂ）、（Ｃ）において従来の切換開閉
器は、固定接触子１０１に磁性体１０３を固定すると共
に、可動接触子１０２に磁性体１０４を固定し、前記固
定接触子１０１に可動接触子１０２を接続させた状態で
各磁性体１０３、１０４の間に間隙Ｇが形成され、過電
流通電時には前記接続状態において固定接触子１０１及
び可動接触子１０２に流れる電流Ｉにより磁性体１０
３、１０４内に磁束Ｍを発生させて磁束Ｍの吸引力によ
り固定接触子１０１に可動接触子１０２を密接接合させ
る構成である。As a countermeasure against this short-circuit accident, in the conventional switching switch shown in FIGS. 5A, 5B and 5C, the magnetic body 103 is fixed to the fixed contact 101 and the movable contact is fixed. A magnetic body 104 is fixed to 102 and a movable contact 102 is connected to the fixed contact 101, and a gap G is formed between the magnetic bodies 103 and 104. The magnetic substance 10 is generated by the current I flowing through the child 101 and the movable contact 102.
The magnetic flux M is generated in the magnets 3 and 104, and the movable contact 102 is closely joined to the fixed contact 101 by the attractive force of the magnetic flux M.
【０００５】次に、前記構成に基づく従来の切換開閉器
の遮断動作について説明する。同図（Ａ）に示すように
固定接触子１０１と可動接触子１０２とは接合状態にあ
る。この状態から同図（Ｂ）のような遮断状態に移行す
る場合には、アークＡが発生すると共に、磁束φが可動
接触子１０２の磁性体１０４には到達せず、中間の空中
を通ることにより磁気閉回路を形成している。この状態
の側面図を同図（Ｃ）において示す。同図において電流
Ｉが作る磁束の分布は磁性体１０３によりその近傍のみ
は極度に透磁率が高いため、磁束密度が増加する。した
がってアーク電流により発生する磁束φ1及びφ2（φ1
＝−φ2）に磁性体により局部的に発生する磁束φ3が重
畳される。Next, the breaking operation of the conventional switching switch based on the above construction will be described. As shown in FIG. 3A, the fixed contact 101 and the movable contact 102 are in a joined state. When transitioning from this state to the cutoff state as shown in FIG. 7B, an arc A is generated, and the magnetic flux φ does not reach the magnetic body 104 of the movable contact 102, but passes through the middle air. To form a magnetic closed circuit. A side view of this state is shown in FIG. In the drawing, the distribution of the magnetic flux generated by the current I has extremely high magnetic permeability only in the vicinity thereof due to the magnetic body 103, so that the magnetic flux density increases. Therefore, the magnetic fluxes φ1 and φ2 (φ1
= −φ2), the magnetic flux φ3 locally generated by the magnetic material is superimposed.
【０００６】したがって、固定接触部のアーク点の左右
においては｜φ1＋φ3｜−｜φ2｜＞０で表される磁束
密度の不平衡が発生するためアークＡに対して磁束密度
の希薄な方向へ電磁力が働く。この効果は可動接触部側
には発生しない。実験的に観察すると、この電磁力のた
めに、固定接触部のアーク点がＰ方向へ急速に移動する
と共に残留イオンも同時に同方向へ移動されるので、ア
ーク柱が細く、且つアーク長が長くなり遮断に極めて有
効である。Therefore, magnetic flux density imbalance represented by | φ1 + φ3 | − | φ2 |> 0 occurs on the left and right of the arc point of the fixed contact portion, so that the electromagnetic flux is weakened relative to the arc A in the direction in which the magnetic flux density is low. Power works. This effect does not occur on the movable contact side. Experimentally, this electromagnetic force causes the arc point of the fixed contact portion to move rapidly in the P direction and the residual ions to move in the same direction at the same time, so the arc column is thin and the arc length is long. It is extremely effective for blocking.
【０００７】図６（Ａ）において従来の切換開閉器は、
電源（図示を省略）側に接続される２つの固定接触子２
２０、２３０の間を負荷（図示を省略）側に接続される
１つの可動接触子２１０が図示矢印Ｂ、Ｃ方向に揺動
し、いずれかの固定接触子２２０、２３０に可動接触子
２１０を接続する構成である。この構成に基づいて従来
の切換開閉器は可動接触子２１０をいずれかの固定接触
子２２０（又は２３０）に揺動させて接続し、この接続
された固定接触子２２０（又は２３０）と可動接触子２
１０とを介して電源側から負荷側へ電源を供給する。こ
の電源供給状態において負荷側で地絡事故等が生じた場
合には、前記可動接触子２１０を中央の中立位置に揺動
させて電源側の電路から事故が生じた負荷側の切離しを
行なう。In FIG. 6A, the conventional switching switch is
Two fixed contacts 2 connected to the power source (not shown)
One movable contact 210 connected to the load (not shown) side between 20 and 230 swings in the directions of arrows B and C in the figure, and the movable contact 210 is attached to one of the fixed contacts 220 and 230. It is a configuration to connect. Based on this configuration, the conventional switching switch swingably connects the movable contact 210 to one of the fixed contacts 220 (or 230), and the movable contact with the connected fixed contact 220 (or 230). Child 2
Power is supplied from the power source side to the load side via If a ground fault or the like occurs on the load side in this power-supply state, the movable contactor 210 is swung to the central neutral position to disconnect the faulty load side from the power line.
【０００８】また、図６（Ｂ）において従来の切換開閉
器は、電源（図示を省略）側に接続される２つの固定接
触子２２０、２３０と、この２つの固定接触子２２０、
２３０の間に配設され、負荷側に接続される１つの負荷
側固定接触子２４０と、前記固定接触子２２０及び負荷
側固定接触子２４０と固定接触子２３０及び負荷側固定
接触子２４０のいずれかを接続する可動接触子２５０と
を備える構成である。この構成に基づいて従来の切換開
閉器は可動接触子２５０を図示矢印Ｄに示すように略く
字状に移動させ、固定接触子２２０及び負荷側固定接触
子２４０に可動接触子２５０を架設して接続する。ま
た、図示矢印Ｅに示すように略く字状に可動接触子２５
０を移動させて固定接触子２３０及び負荷側固定接触子
２４０に架設して接続する。Further, in FIG. 6B, the conventional switching switch has two fixed contacts 220 and 230 connected to the power source (not shown) side and the two fixed contacts 220 and 220.
Any one of the load side fixed contactor 240 disposed between 230 and connected to the load side, the fixed contactor 220 and the load side fixed contactor 240, the fixed contactor 230 and the load side fixed contactor 240. This is a configuration including a movable contact 250 that connects the two. Based on this configuration, the conventional switching switch moves the movable contact 250 in a substantially V shape as shown by an arrow D, and installs the movable contact 250 on the fixed contact 220 and the load-side fixed contact 240. To connect. Further, as shown by an arrow E in the drawing, the movable contact 25 is formed in a substantially V shape.
0 is moved and installed and connected to the fixed contactor 230 and the load-side fixed contactor 240.
【０００９】図７において従来の切換開閉器を用いた安
全保護システムは、常用電源側の電路３０１と予備電源
側の電路３０２とを切換える常用予備電源自動切換開閉
器３０３と、この常用予備電源自動切換開閉器３０３と
負荷側との間に接続される地絡保護付開閉器３０４と、
この地絡保護付開閉器３０４にトランス３０５を介して
接続されるＳＯＧ（Storage Overcurrent Ground；過電
流蓄勢トリップ付き地絡トリップ形）制御装置３０６と
を備える構成である。In FIG. 7, a conventional safety protection system using a switching switch includes a normal standby power automatic switching switch 303 for switching between a power line 301 on the regular power source side and a power line 302 on the standby power source side, and this automatic standby power source automatic switching switch 303. A switch with ground fault protection 304 connected between the switching switch 303 and the load side;
The SOG (Storage Overcurrent Ground; ground fault trip type with overcurrent accumulation trip) control device 306 connected to the switch 304 with ground fault protection via a transformer 305 is provided.
【００１０】前記構成に基づく従来の安全保護システム
は常用予備電源自動切換開閉器３０３が常用電源側で停
電事故が生じた場合に予備電源側に切り換える。また、
地絡保護付開閉器３０４が負荷側での地絡事故を検出し
た場合は即時に遮断動作を行なうが、負荷側での過電流
事故を検出した場合は現在状態（投入状態）を維持す
る。そして、電源側の変電所の過負荷遮断器が遮断動作
して、無電圧となった後、開閉器は開放動作をする。In the conventional safety protection system based on the above structure, the automatic standby power supply automatic switching switch 303 switches to the standby power supply side when a power failure occurs on the regular power supply side. Also,
When the switch with ground fault protection 304 detects a ground fault accident on the load side, the shutoff operation is immediately performed, but when an overcurrent accident on the load side is detected, the current state (closed state) is maintained. Then, after the overload circuit breaker of the substation on the power supply side is shut off and there is no voltage, the switch is opened.
【００１１】[0011]
【発明が解決しようとする課題】従来の切換開閉器は以
上のように構成されていたので、配電線の短絡事故時に
おいて、例えば図５に記載の切換開閉器にあっては常用
電源、予備電源及び中立位置の切換えるような構成は開
示されていない。また、図６（Ａ）に記載の切換開閉器
にあっては、過大電流通電回路での両面接触子の閉成時
に反跳躍現象が大きく、また十分な遮断距離がとれず２
つの固定接触子間に混触を生じるという課題を有する。
また図６（Ｂ）に記載の切換開閉器にあっては、略く字
形状の移動動作を行なうことから機械的な構成が複雑と
なり、接触不良・誤動作等による確実な開閉動作ができ
ないという課題を有する。Since the conventional switching switch is constructed as described above, in the case of a short circuit of a distribution line, for example, in the switching switch shown in FIG. No configuration for switching between the power source and the neutral position is disclosed. Further, in the switching switch shown in FIG. 6 (A), the recoil phenomenon is large when the double-sided contact is closed in the excessive current energizing circuit, and a sufficient breaking distance cannot be obtained.
There is a problem that touching occurs between two fixed contacts.
Further, in the switching switch shown in FIG. 6 (B), since a substantially V-shaped moving operation is performed, the mechanical structure becomes complicated, and reliable opening / closing operation cannot be performed due to poor contact or malfunction. Have.
【００１２】さらに、図７に記載の切換開閉器にあって
は、常用予備電源自動切換開閉器３０３、地絡保護付開
閉器３０４が各々別体として接続されていることから、
システム全体として取付コストが上昇し、システム全体
が大型化して装柱が複雑化すると共に工事作業性が悪化
するという課題を有していた。本発明は前記課題を解消
するためになされたもので、過大電流通電及び投入時の
反跳現象を抑制して開閉動作を確実に行なうと共に遮断
特性を改良し、且つシステム全体をコンパクト化した切
換開閉器を提供することを目的とする。Further, in the switching switch shown in FIG. 7, since the regular standby power supply automatic switching switch 303 and the ground fault protection switch 304 are separately connected,
There are problems that the installation cost increases as a whole system, the whole system becomes large, the pillars become complicated, and the workability of construction deteriorates. The present invention has been made to solve the above-mentioned problems, and it is possible to suppress the recoil phenomenon at the time of energizing and turning on an excessive current to surely perform the opening / closing operation, improve the breaking characteristic, and make the entire system compact. The purpose is to provide a switch.
【００１３】[0013]
【課題を解決するための手段】本発明に係る切換開閉器
は、常用電源に接続される常用固定接触子と、予備電源
に接続される予備固定接触子と、前記常用・予備の各固
定接触子の間に位置する中立位置の間の支点を中心とし
て台金アームを回動させて常用又は予備の各固定接触子
との間で切換えて負荷側に接続する可動接触子とを筐体
内に収納して構成される切換開閉器において、前記可動
接触子は常用及び予備の各固定接触子の固定接点に対向
する台金アームの両側に可動接触点を配設し、前記各可
動接点を凹溝内に収納する断面略Ｈ字形状の磁性体を台
金アームに装着するものである。A switching switch according to the present invention comprises a service fixed contact connected to a service power source, a spare fixed contact connected to a standby power supply, and the service / spare fixed contacts. A movable contact that connects the load side by rotating the base metal arm around a fulcrum between neutral positions located between the children and connecting to the fixed side of the regular or auxiliary fixed contacts In the switching switch configured to be housed, the movable contact is provided with movable contact points on both sides of a base metal arm facing the fixed contact of each of the normal and spare fixed contacts, and the movable contacts are recessed. A magnetic body having a substantially H-shaped cross section to be housed in the groove is attached to the base metal arm.
【００１４】また、本発明は必要に応じて、可動接触子
の支点を中心として常用固定接触子及び予備固定接触子
に略対称な位置に配設され、前記負荷側に接続される一
対の負荷側固定接触子を備え、前記可動接触子は支点を
中心として両方に延出する台金アームの略対称な位置に
可動接点及び磁性体を各々配設し、前記支点を中心に一
方に回転して常用固定接触子と一方の負荷側固定接触子
とに接続すると共に、前記支点を中心として他方に回転
して予備固定接触子と他方の負荷側固定接触子とに接続
するものである。Further, according to the present invention, a pair of loads connected to the load side are arranged at positions substantially symmetrical to the fixed stationary contact and the preliminary fixed contact with the fulcrum of the movable contact as the center, as required. The movable contactor is provided with a side fixed contactor, and the movable contactor and the magnetic body are arranged at substantially symmetrical positions of a base metal arm extending to both sides about a fulcrum, and the movable contactor is rotated around the fulcrum in one direction. The stationary fixed contactor and one of the load side fixed contactors are connected to each other, and are rotated about the fulcrum to the other side to be connected to the preliminary fixed contactor and the other load side fixed contactor.
【００１５】さらに、本発明は必要に応じて、各接触子
に接続される電路の通電状態を検出する過電流継電器、
零相変流器又は零相蓄電器を適宜選択的に組合せて配設
し、各検出結果に基づいて負荷側における地路事故又は
過電流事故を検出して前記可動接触子を中立位置に回動
して切離し、前記地絡事故又は過電流事故が復旧した後
に常用又は予備のいずれかの固定接触子へ可動接触子を
切換えるものである。Further, according to the present invention, if necessary, an overcurrent relay for detecting an energized state of an electric path connected to each contact,
Zero-phase current transformers or zero-phase capacitors are arranged in an appropriate combination, and the ground contact or overcurrent accident on the load side is detected based on each detection result and the movable contact is rotated to the neutral position. Then, after the ground fault or overcurrent accident is recovered, the movable contact is switched to either the fixed contact of the normal use or the spare.
【００１６】[0016]
【作用】本発明においては、常用及び予備の各固定接触
子とこの中間位置との３つの位置を可動接触子が台金ア
ームの中心を支点として回動移動して選択的に接続し、
この可動接触子の台金アーム両端に配設された可動接点
を断面略Ｈ字形状の凹構内に収納する磁性体が台金アー
ムに装着されることにより、過電流投入及び過電流通電
時における反跳防止と遮断時に生じるアークの磁気吹き
消し作用を向上させること等で、投入動作及び遮断動作
を円滑且つ確実に行なう。In the present invention, the movable contact rotatably moves the three positions of the normal and spare fixed contacts and the intermediate position between them to selectively connect them to each other.
By attaching a magnetic body, which accommodates the movable contacts arranged at both ends of the base metal arm of the movable contactor, into the concave structure having a substantially H-shaped cross section, the base metal arm is provided with a magnetic material for overcurrent application and overcurrent application. By making the recoil prevention and improving the magnetic blowout action of the arc generated at the time of interruption, the closing operation and the closing operation are smoothly and surely performed.
【００１７】また、本発明においては、この台金アーム
の支点を中心とし可動接触子の台金アームの支点を中心
に両方に延出させて形成し、常用及び予備の各固定接触
子に対称な位置に一対の負荷側固定接触子を配設するよ
うにしたので、台金アームの回転により常用及び予備側
の各固定接触子を各々接続できることとなり、遮断時に
おける各接触子間の間隔を大きくして遮断特性を向上さ
せることができる。さらに、本発明においては常用及び
予備の各固定接触子、負荷側接触子の近傍に過電流継電
器、零相変流器、零相蓄電器を各々配設するようしたの
で、電路保護のシステムをコンパクトな開閉器で構成で
きることとなり、装柱の簡略化と共に取付け工事の作業
性を向上させる。Further, in the present invention, the base metal arm is formed so as to extend both around the fulcrum of the base metal arm and the fulcrum of the base metal arm of the movable contact, and to be symmetrical with respect to each of the normal and spare fixed contacts. Since a pair of load side fixed contacts are arranged at various positions, it is possible to connect the fixed and fixed side fixed contacts to each other by rotating the base metal arm. It can be increased to improve the breaking characteristic. Further, in the present invention, since the overcurrent relay, the zero-phase current transformer, and the zero-phase capacitor are arranged in the vicinity of the normal and spare fixed contacts, the load-side contact, respectively, the system for protecting the circuit is compact. Since it can be configured with a simple switch, it simplifies the mounting columns and improves workability of installation work.
【００１８】[0018]
（本発明の一実施例）以下、本発明の一実施例を図１及
び図２に基づいて説明する。この図１は本実施例に係る
切換開閉器の平面図、図２は図１に記載の実施例におけ
る可動接触子の要部拡大図である。(One Embodiment of the Invention) One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of a switching switch according to this embodiment, and FIG. 2 is an enlarged view of a main part of a movable contact in the embodiment shown in FIG.
【００１９】前記各図において本実施例に係る切換開閉
器は、本体ケーシング７の側壁に取付けられて外部の常
用電源（図示を省略）に接続される常用電源側ブッシン
グ２ｃに取付けられた常用固定接触子２と、前記本体ケ
ーシング７の側壁に取付けられて外部の予備電源（図示
を省略）に接続される予備電源側ブッシング３ｃに取付
けられた予備固定接触子３と、前記本体ケーシング７の
側壁における常用及び予備の各電源側ブッシング２ｃ、
３ｃに対向する対称位置に取付けられ、需要家の構内等
の負荷側に接続される２つの負荷側ブッシング４ｃ及び
支持台５ｃに取付けられた負荷側固定接触子４、５と、
前記本体ケーシング７の略中央部を支点１５ｂとして回
動自在に支持され、この支点１５ｂの両側に延出する台
金アーム１０の両端部の各表裏面に４つの可動接点１３
ａ・１３ｂ、１４ａ・１４ｂを配設した可動接触子１と
を備える構成である。In each of the above figures, the switching switch according to the present embodiment is a fixed fixture mounted on a side wall of the body casing 7 and attached to a bushing 2c on the side of a regular power source connected to an external regular power source (not shown). The contactor 2, a pre-fixed contactor 3 attached to the side wall of the main body casing 7 and the auxiliary power source side bushing 3c connected to an external auxiliary power source (not shown), and the side wall of the main body casing 7. Each of the normal and spare power source side bushings 2c,
Load side fixed contacts 4 and 5 attached to two load side bushings 4c and support bases 5c, which are attached at symmetrical positions opposite to 3c and are connected to the load side of the customer's premises,
Four movable contacts 13 are rotatably supported with the substantially central portion of the main body casing 7 as a fulcrum 15b, and on both front and rear surfaces of both ends of the base metal arm 10 extending on both sides of the fulcrum 15b.
and a movable contactor 1 in which a 13b and 14a 14b are arranged.
【００２０】前記可動接触子１は可動接点１３ａ・１３
ｂ、１４ａ・１４ｂを略断面Ｈ字状の凹部内に収納し、
前記台金アーム１０の端部に装着される磁性体１１、１
２と、図示矢印Ｆ（Ｇ）、Ｈ（Ｉ）の各方向に回動して
前記可動接点１３ａ、１３ｂ、１４ａ、１４ｂを常用固
定接触子２、予備固定接触子３又は２つの負荷側固定接
触子４、５に対して接続・遮断動作を行なう台金アーム
１０と、この台金アーム１０の中央部分をボルト１５ａ
により固着し、支点１５ｂを中心に回動する支持杆１５
とを備える構成である。この支持杆１５は、図示紙面垂
直方向に延在し、この延在する長手方向に所定間隔をお
いて三相交流Ｒ・Ｓ・Ｔ（３相４線式の場合は中性線を
含む）に各々対応する３つ（３相４線式の場合は４つ）
の台金アーム１０が取付けられる構成である。The movable contact 1 has movable contacts 13a and 13a.
b, 14a, 14b are housed in a recess having a substantially H-shaped cross section,
Magnetic bodies 11 and 1 attached to the ends of the base arm 10.
2 and the movable contacts 13a, 13b, 14a, 14b by rotating in the directions of arrows F (G), H (I) shown in the figure to fix the stationary contacts 2, the preliminary fixed contacts 3 or the two load side fixations. A base metal arm 10 for connecting and disconnecting the contacts 4 and 5, and a central portion of the base metal arm 10 are fixed to a bolt 15a.
The support rod 15 fixed by the support rod 15 and rotated about the fulcrum 15b.
And a configuration including. The support rod 15 extends in a direction perpendicular to the plane of the drawing, and three-phase alternating current R / S / T (including a neutral wire in the case of a three-phase four-wire system) at predetermined intervals in the extending longitudinal direction. 3 corresponding to each (4 in case of 3-phase 4-wire system)
The base metal arm 10 is attached.
【００２１】前記常用電源側ブッシング２ｃ及び予備電
源側ブッシング３ｃには、本体ケーシング７の内側壁近
傍に過電流継電器２ａ、３ａが装着され、この過電流継
電器２ａ、３ａにより電路に流れる過電流を検出する。
前記２つの負荷側固定接触子４、５は、導電線５ａによ
り接続されて電気的に一体化している。この負荷側ブッ
シング４ｃには、本体ケーシング７の内側近傍に零相変
流器４ａが装着され、この零相変流器４ａにより地絡
（事故）電流（零相電流）を検出する。The normal power source side bushing 2c and the standby power source side bushing 3c are provided with overcurrent relays 2a and 3a near the inner wall of the main body casing 7, and the overcurrent relays 2a and 3a prevent overcurrent from flowing in the electric line. To detect.
The two load side fixed contacts 4 and 5 are connected by a conductive wire 5a and are electrically integrated. A zero-phase current transformer 4a is attached to the load side bushing 4c near the inside of the main body casing 7, and a ground fault (fault) current (zero-phase current) is detected by the zero-phase current transformer 4a.
【００２２】また、前記本体ケーシング７の内側壁には
零相蓄電器６が配設され、この零相蓄電器６と前記負荷
側固定接触子５とを導電線６ａで接続する。なお、本実
施例では過電流継電器２ａ、３ａを常用電源側ブッシン
グ２ｃ及び予備電源側ブッシング３ｃとで２セット装着
するようにしたが、この代用として過電流継電器を１セ
ット負荷側ブッシング４ｃへ零相変流器４ａと併設する
こともできる。A zero-phase battery 6 is provided on the inner wall of the main body casing 7, and the zero-phase battery 6 and the load-side fixed contact 5 are connected by a conductive wire 6a. In this embodiment, two sets of the overcurrent relays 2a and 3a are mounted by the regular power source side bushing 2c and the standby power source side bushing 3c. However, as an alternative, one set of the overcurrent relay is connected to the load side bushing 4c. It can also be installed together with the phase current transformer 4a.
【００２３】なお、過電流継電器の１セットは主回路の
Ｒ、Ｔ相（又は、Ｕ、Ｗ相）又は、Ｒ、Ｓ、Ｔ相（又
は、Ｕ、Ｖ、Ｗ相）のいずれかを選択し得る。このよう
に電源側ブッシング２ｃ、３ｃ及び負荷側ブッシング４
ｃ、支持台５ｃを備える本体ケーシング７に過電流継電
器２ａ、３ａ、零相変電器４ａ及び零相畜電器６を各々
収納配設するようにしたので、常用予備電源自動切換開
閉器と、地絡保護付開閉器を一体化できることとなり、
装置全体をコンパクト化できる。In addition, one set of the overcurrent relay selects either R, T phase (or U, W phase) or R, S, T phase (or U, V, W phase) of the main circuit. You can Thus, the power source side bushings 2c, 3c and the load side bushing 4
c, the overcurrent relays 2a, 3a, the zero-phase transformer 4a, and the zero-phase electricity storage device 6 are housed and arranged in the main body casing 7 including the support base 5c, respectively. It will be possible to integrate a switch with a fault protection,
The entire device can be made compact.
【００２４】なお、前記本体ケーシング７は、断面略正
八角形の枠体で形成され、この八角形の各八辺の平面部
分に各電源側ブッシング２ｃ、３ｃ、負荷側ブッシング
４ｃ及び支持台５ｃを安定的に取付ける構成である。な
お、この本体ケーシングは、正８角形の断面形状以外
に、他の多角形又は円形の断面形状で構成することもで
きる。次に、前記構成に基づく本実施例に係る切換開閉
器の動作について図３を参照して説明する。この図３
（Ａ）、（Ｂ）は各接触子の投入状態及び遮断へ移行す
る状態の動作説明図である。The main casing 7 is formed of a frame body having a substantially regular octagonal cross section, and the power source side bushings 2c, 3c, the load side bushing 4c, and the support 5c are provided on the plane portion of each octagon of the octagon. It is a structure that can be installed stably. The main casing may have a polygonal or circular cross-sectional shape other than the regular octagonal cross-sectional shape. Next, the operation of the switching switch according to the present embodiment based on the above configuration will be described with reference to FIG. This Figure 3
(A), (B) is operation | movement explanatory drawing of the state which shifts to a closing state of each contactor, and interruption | blocking.
【００２５】まず、操作部（図示を省略）の操作により
支持杆１５を支点１５ｂを中心に回転させて台金アーム
１０を図示矢印Ｆ及び矢印Ｇ方向に移動させる。この移
動により図３（Ａ）に示すように回転アーム１０の可動
接点１３ａを常用固定接触子２の常用接点２１に接続さ
せると共に、回転アーム１０の可動接点１４ａを負荷側
固定接触子５の負荷接点５１に接続させる。ここで、本
発明の磁性体を構成しないもので、且つ通常の通電電流
では問題なく投入及び連続通電できる接触圧力を有する
構成（図示せず）において、過大電流回路の閉成時及び
閉成状態での過大電流通電時では接点の反跳現象が起こ
り、接点溶着・他の不具合等が発生することがある。First, the support rod 15 is rotated about the fulcrum 15b by operating an operating portion (not shown) to move the base metal arm 10 in the directions indicated by arrows F and G. As a result of this movement, as shown in FIG. 3A, the movable contact 13a of the rotary arm 10 is connected to the regular contact 21 of the regular fixed contact 2, and the movable contact 14a of the rotary arm 10 is connected to the load of the load side fixed contact 5. Connect to contact 51. Here, in a configuration (not shown) that does not constitute the magnetic body of the present invention and has a contact pressure that can be applied and continuously energized with a normal energizing current without any problem, the overcurrent circuit is in a closed state and a closed state. When an excessive current is applied to the contacts, the recoil phenomenon of the contacts may occur, resulting in contact welding and other problems.
【００２６】しかし、本発明の前記記載の磁性体を構成
するものにおいては、過大電流通電時に接点の反跳力を
上回る該電流での磁束発生により、磁性体間での電磁吸
引力のため接点の反跳現象を防止できることになる。本
実施例では図３（Ａ）に示すような磁気回路に磁束φa
が発生し、磁性体１１、１２と補助磁性体２１ａ、５１
ａと吸引接合して接触の反跳現象を防止できることとな
る。通常の電流供給状態において構内負荷側で地絡事故
が発生すると、この地絡事故により流れる地絡（事故）
電流（零相電流）を零相流器４ａが検出する。この検出
結果に基づいて支持杆１５を支点１５ｂを中心に回転さ
せて台金アーム１０を矢印Ｈ及び矢印Ｉ方向に移動させ
て図１に示す中立位置の遮断状態とする。However, in the above-mentioned magnetic body of the present invention, when an excessive current is applied, the magnetic flux is generated at a current exceeding the recoil force of the contact, and the electromagnetic attraction between the magnetic bodies causes the contacts to contact. The recoil phenomenon can be prevented. In this embodiment, the magnetic flux φa is applied to the magnetic circuit as shown in FIG.
Occurs, and the magnetic bodies 11 and 12 and the auxiliary magnetic bodies 21a and 51 are generated.
The recoil phenomenon of the contact can be prevented by suction-joining with a. When a ground fault occurs on the premises load side under normal current supply conditions, this ground fault causes a ground fault (accident).
The zero phase current 4a detects the current (zero phase current). Based on this detection result, the support rod 15 is rotated around the fulcrum 15b to move the base metal arm 10 in the directions of arrows H and I to bring the neutral position shown in FIG.
【００２７】また、遮断状態に移行する中間の状態には
図３（Ｂ）のように常用接点２１、（又は５１）と可動
接点１３ａ、（又は１４ａ）との間にアークＡが発生す
る。この常用接点２１、（又は５１）と可動接点１３
ａ、（又は１４ａ）との間隔が拡大すると、アークＡに
より可動接触子１内にアーク電流が可動接点１３ａ（又
は１４ａ）に流れてこの電流による磁束φbは磁気抵抗
により略Ｈ字形の磁性体１１（又は１２）の平行な両側
の一部分と固定接点２１（又は５１）側の空間部分とか
らなる磁気閉回路を通ることとなる。この空間部分が前
記磁気閉回路中において大きな磁気抵抗となり、この大
きな磁気抵抗で磁束φbを急速に減衰させる。このよう
に遮断時において磁束φbを減衰させることにより常用
（又は予備）及び負荷側の各固定接触子２（又は３）、
５（又は４）に対する吸引力を小さくし、遮断動作を円
滑に実行できることとなる。また、この遮断動作時にお
けるアークＡの磁気吹き消し作用については前記図５
（Ｃ）に記載するように磁束密度のバランスを崩すこと
により、この磁束密度の小さな方向へ電磁力が作用して
アーク柱を細く且つ長くすることにより遮断特性を向上
させている。Further, in the intermediate state of shifting to the cutoff state, an arc A is generated between the regular contact 21, 21 (or 51) and the movable contact 13a, (or 14a) as shown in FIG. 3B. The normal contact 21, (or 51) and the movable contact 13
When the distance between a and (or 14a) increases, an arc current causes an arc current to flow into the movable contact 13a (or 14a) in the movable contact 1 due to the arc A, and the magnetic flux φb due to this current causes a magnetic resistance of a substantially H-shaped magnetic body. The magnetic closed circuit is formed by 11 (or 12) parts on both sides in parallel and a space part on the fixed contact 21 (or 51) side. This space portion has a large magnetic resistance in the magnetic closed circuit, and this large magnetic resistance rapidly attenuates the magnetic flux φb. In this way, by attenuating the magnetic flux φb at the time of interruption, the fixed contact 2 (or 3) of the normal (or spare) and load side,
The suction force for 5 (or 4) can be reduced, and the shutoff operation can be performed smoothly. In addition, regarding the magnetic blowout action of the arc A at the time of this interruption operation, as shown in FIG.
By breaking the balance of the magnetic flux density as described in (C), the electromagnetic force acts in the direction in which the magnetic flux density is small, and the arc column is made thin and long, thereby improving the breaking characteristic.
【００２８】このように支持杆１５を支点として両側に
延出する台金アーム１０を回動させて、この支点１５ｂ
を中心として対称な位置に配設された常用固定接触子２
と負荷側固定接触子５（又は、予備固定接触子３と負荷
側固定接触子４）とに各々接続するようにしたので、各
々の間隔の総和で遮断間隔を形成できることとなり、よ
り確実な遮断（中立）状態とすることができると共に、
システム全体をコンパクト化できる。また、前記地絡事
故の場合に遮断動作を行なうのに対して前記過電流継電
器２ａ（又は、３ａ）が電路に流れる短絡事故に基づく
過大電流を検出した場合には図示を省略するＳＯＧ制御
装置は現在の状態を維持（ロック）して遮断動作を行な
わない。そして、短絡事故に基づく過大電流通電時は、
変電所等の過負荷遮断器が遮断動作して無電圧となった
後、本切換開閉器が開放する。In this way, the base metal arm 10 extending on both sides with the support rod 15 as a fulcrum is rotated, and the fulcrum 15b is rotated.
Fixed contacts 2 arranged symmetrically with respect to
And the load-side fixed contactor 5 (or the preliminary fixed contactor 3 and the load-side fixed contactor 4) are connected to each other, so that the interruption interval can be formed by the sum of the respective intervals, and more reliable interruption can be achieved. It can be in a (neutral) state,
The entire system can be made compact. Further, when the overcurrent relay 2a (or 3a) detects an excessive current due to a short-circuit accident flowing in the electric path, while the shutoff operation is performed in the case of the ground fault, the SOG control device not shown is shown. Keeps the current state (locks) and does not perform the breaking operation. And, when energizing excessive current due to short circuit accident,
After the overload circuit breaker at the substation, etc., shuts off and there is no voltage, this switching switch opens.
【００２９】前記遮断又は開放動作が完了して中立状態
となると中立（無電圧）状態を維持し、地絡又は短絡等
の事故点が復旧された後に常用または予備のいずれかの
固定接触子２、３へ可動接触子１を回動させて接続する
ことになる。なお、常用又は予備の各電源が正常である
場合には常用電源への接続を優先して行なうこととな
る。When the breaking or opening operation is completed and the neutral state is reached, the neutral (no-voltage) state is maintained, and after the accident point such as the ground fault or the short circuit is restored, either the regular or the spare fixed contact 2 The movable contact 1 is rotated to connect to 3. When the normal or standby power supply is normal, the connection to the normal power supply is given priority.
【００３０】（本発明の他の実施例）図４は本発明に係
る切換開閉器の平面図を示す。同図において本実施例に
係る切換開閉器は、本体ケーシング７の略中央部に配設
される支持杆１５の支点を支点１５ｂとして回動自在に
支持され、この支点１５ｂの片側に延出する台金アーム
１０の端部に対称に２つの可動接点１３ａ、１３ｂを配
設した可動接触子１と、この可動接触子１の支点１５ｂ
を中心として対称な、本体ケーシング７の側壁に配設さ
れる常用・予備電源側ブッシング２ｃ、３ｃ及びこれに
配設接続される常用及び予備の各固定接触子２、３と、
前記可動接触子１に導電線で接続され、本体ケーシング
７の側壁に配設される負荷側ブッシング４ｃと、この負
荷側ブッシング４ｃに導電線６ａで接続され、本体ケー
シング７の内側壁に配設される零相蓄電器６とを備える
構成である。(Other Embodiments of the Present Invention) FIG. 4 is a plan view of a switching switch according to the present invention. In the figure, the switchgear according to the present embodiment is rotatably supported with a fulcrum of a support rod 15 arranged substantially in the center of the main body casing 7 as a fulcrum 15b, and extends to one side of the fulcrum 15b. A movable contact 1 having two movable contacts 13a and 13b symmetrically arranged at the end of the base arm 10, and a fulcrum 15b of the movable contact 1.
Normal / spare power source side bushings 2c and 3c arranged on the side wall of the main body casing 7 and symmetrical and fixed to the normal and spare fixed contacts 2 and 3 arranged and connected thereto,
A load side bushing 4c which is connected to the movable contactor 1 by a conductive wire and is arranged on the side wall of the main body casing 7, and a conductive wire 6a which is connected to the load side bushing 4c and which is arranged on the inner side wall of the main body casing 7. And a zero-phase power storage device 6 that is configured as described above.
【００３１】前記構成に基づく本実施例においては図１
に記載する実施例の場合と同様に支持杆１５を回動させ
ることにより、台金アーム１０を図示矢印Ｊ（又はＫ）
方向に揺動させて常用又は予備のいずれかの固定接触子
２、３へ接続させる。この接続状態において地絡事故が
生じた場合には零相変流器４ａが地絡（事故）電流を検
出し、この検出結果に基づいて前記支持杆１５を回動さ
せて遮断動作を実行する。この遮断状態の後の事故復旧
後、常用又は予備のいずれかの電源に接続することとな
る。In the present embodiment based on the above configuration, FIG.
By rotating the support rod 15 in the same manner as in the case of the embodiment described in (1), the base metal arm 10 is moved to the arrow J (or K) shown in the figure.
It is oscillated in the direction to connect to the fixed contacts 2 and 3 which are either normal or spare. When a ground fault occurs in this connected state, the zero-phase current transformer 4a detects a ground fault (fault) current, and based on this detection result, the support rod 15 is rotated to execute the breaking operation. . After the recovery of the accident after this cutoff state, it will be connected to either the regular or standby power source.
【００３２】また、短絡事故に基づく過大電流を検出し
た場合には、前記本発明の一実施例と同様の動作である
ため説明を省略する。なお、前記各実施例においては可
動接触子１の磁性体１１を断面Ｈ形に一体形成する構成
としたが、略コ字形状の２つの磁性体を組合わせ、外側
に各々形成された各凹構内に可動接点を収納配設する構
成とすることもできる。Further, when an excessive current due to a short circuit accident is detected, the operation is the same as that of the above-mentioned embodiment of the present invention, and the explanation thereof will be omitted. In each of the above embodiments, the magnetic body 11 of the movable contactor 1 is integrally formed to have an H-shaped cross section. However, two substantially U-shaped magnetic bodies are combined to form each concave portion formed outside. It is also possible to adopt a configuration in which the movable contact is housed in the premises.
【００３３】[0033]
【発明の効果】以上のように、本発明においては、常用
及び予備の各固定接触子とこの中間位置との３つの位置
を可動接触子が台金アームの中心を支点として回動移動
して選択的に接続し、この可動接触子の台金アーム両端
に配設された可動接点を断面略Ｈ字形状の凹構内に収納
する磁性体が台金アームに装着されることにより、過電
流投入時又は過大電流通電時における反跳防止と遮断時
に生じるアークの磁気吹き消し作用を向上させることに
より、投入動作及び遮断動作を円滑且つ確実に行なうと
いう効果を奏する。また、本発明においては、可動接触
子の台金アームの支点を中心に両方に延出させて形成
し、常用及び予備の各固定接触子に対称な位置に一対の
負荷側固定接触子を配設するようにしたので、台金アー
ムの回転により常用及び予備側の各固定接触子を負荷側
固定接触子に各々接続できることとなり、遮断時におけ
る各接触子間の間隔を大きくして遮断特性を向上させる
ことができるという効果を有する。さらに、本発明にお
いては常用・予備の電源側ブッシング、及び負荷側ブッ
シングに過電流継電器、零相変流器、零相蓄電器を適宜
選択的に組合わせて配設するようしたので、電路保護の
システムを常用予備電源自動切換開閉器と地絡保護付開
閉器とを一体化したコンパクトな開閉器で構成できるこ
ととなり、装柱の簡略化と共に取付け工事の作業性を向
上させるという効果を有する。As described above, according to the present invention, the movable contact is pivotally moved about the center of the base metal arm at three positions, namely, the fixed contact for the normal use and the fixed contact for the spare and the intermediate position. A magnetic material that selectively connects and houses the movable contacts arranged at both ends of the base metal arm of the movable contactor in a concave structure having a substantially H-shaped cross section is attached to the base metal arm to input an overcurrent. In this case, the recoil prevention at the time of energization of an excessive current or the magnetic blowout action of the arc generated at the time of interruption is improved, so that the closing operation and the interruption operation can be performed smoothly and reliably. Further, in the present invention, the movable contact is formed by extending both around the fulcrum of the base arm of the movable contact, and a pair of load side fixed contacts are arranged at symmetrical positions with respect to the normal and spare fixed contacts. Since it is installed, it is possible to connect the fixed contacts of the normal and standby sides to the fixed contacts of the load side by rotating the base metal arm. It has the effect that it can be improved. Further, in the present invention, since the overcurrent relay, the zero-phase current transformer, and the zero-phase capacitor are arranged in the normal / spare power source side bushing and the load side bushing in an appropriate selective combination, it is possible to protect the electric circuit. Since the system can be configured with a compact switch in which a regular standby power automatic switching switch and a switch with ground fault protection are integrated, there is an effect that the mounting pole is simplified and the workability of installation work is improved.
【図１】本発明の一実施例に係る切換開閉器の平面図で
ある。FIG. 1 is a plan view of a switching switch according to an embodiment of the present invention.
【図２】図１に記載の切換開閉器における可動接触子の
要部拡大図である。FIG. 2 is an enlarged view of a main part of a movable contact in the switching switch shown in FIG.
【図３】図１に記載の切換開閉器における可動接触子の
開閉動作説明図である。FIG. 3 is an explanatory diagram of an opening / closing operation of a movable contact in the switching switch shown in FIG.
【図４】本発明の他の切換開閉器における可動接触子の
開閉動作説明図である。FIG. 4 is an explanatory view of the opening / closing operation of the movable contactor in another switching switch of the present invention.
【図５】従来の切換開閉器の可動接触子の開閉動作説明
図である。FIG. 5 is an explanatory diagram of opening / closing operation of a movable contactor of a conventional switching switch.
【図６】従来の切換開閉器の可動接触子の開閉動作説明
図である。FIG. 6 is an explanatory diagram of opening / closing operation of a movable contactor of a conventional switching switch.
【図７】従来の安全保護システムの概略回路構成図であ
る。FIG. 7 is a schematic circuit configuration diagram of a conventional safety protection system.
【符号の説明】 １ 可動接触子 ２ 常用固定接触子 ３ 予備固定接触子 ２ａ、３ａ 過電流継電器 ２ｃ 常用電源側ブッシング ３ｃ 予備電源側ブッシング ４、５ 負荷側固定接触子 ４ａ 零相変流器 ４ｃ 負荷側ブッシング ５ｃ 支持台 ６ 零相蓄電器 ５ａ、６ａ 導電線 ７ 本体ケーシング １０ 台金アーム １１、１２ 磁性体 １３ａ、１３ｂ、１４ａ、１４ｂ 可動接点 １５ 支持杆 １５ａ ボルト １５ｂ 支点 ２１ 常用電源側固定接点 ３１ 予備電源側固定接点 ２１ａ、５１ａ 補助磁性体 ４１ 予備負荷側固定接点 ５１ 常用負荷側固定接点[Explanation of symbols] 1 movable contact 2 regular fixed contact 3 preliminary fixed contact 2a, 3a overcurrent relay 2c normal power supply side bushing 3c standby power supply side bushing 4, 5 load side fixed contact 4a zero-phase current transformer 4c Load side bushing 5c Support base 6 Zero-phase condenser 5a, 6a Conductive wire 7 Main body casing 10 Base metal arm 11, 12 Magnetic material 13a, 13b, 14a, 14b Movable contact 15 Support rod 15a Bolt 15b Support point 21 Regular power supply side fixed contact 31 Backup power supply side fixed contact 21a, 51a Auxiliary magnetic body 41 Preload side fixed contact 51 Regular load side fixed contact
Claims (3)
と、予備電源に接続される予備固定接触子と、前記常用
・予備の各固定接触子の間に位置する中立位置の間の支
点を中心として台金アームを回動させて常用又は予備の
各固定接触子との間で切換えて負荷側に接続する可動接
触子とを筐体内に収納して構成される切換開閉器におい
て、 前記可動接触子は常用及び予備の各固定接触子の固定接
点に対向する台金アームの両側に可動接点を配設し、前
記各可動接点を凹構内に収納する断面略Ｈ字形状の磁性
体を台金アームに装着することを特徴とする切換開閉
器。1. A fulcrum between a service fixed contact connected to a service power supply, a backup fixed contact connected to a backup power supply, and a neutral position located between the service and backup fixed contacts. A switching switch constituted by rotating a base metal arm as a center to switch between a fixed contact and a normal or spare fixed contact and connecting to a load side in a housing, wherein the movable switch is movable. The contactor has movable contacts arranged on both sides of a base metal arm which faces the fixed contacts of each of the stationary and spare fixed contacts, and mounts the movable contacts in a concave structure with a magnetic body having a substantially H-shaped cross section. A switch that is mounted on a gold arm.
て、 前記可動接触子の支点を中心として常用固定接触子及び
予備固定接触子に略対称な位置に配設され、前記負荷側
に接続される一対の負荷側固定接触子を備え、 前記可動接触子は支点を中心として両方に延出する台金
アームの略対称な位置に可動接点及び磁性体を各々配設
し、前記支点を中心に一方に回転して常用固定接触子と
一方の負荷側固定接触子とに接続すると共に、前記支点
を中心として他方に回転して予備固定接触子と他方の負
荷側固定接触子とに接続することを特徴とする切換開閉
器。2. The switching switch according to claim 1, wherein the switch is arranged in a position substantially symmetrical with respect to the stationary fixed contact and the preliminary fixed contact about a fulcrum of the movable contact and connected to the load side. A pair of load side fixed contacts, wherein the movable contact is provided with a movable contact and a magnetic body at substantially symmetrical positions of a base metal arm that extends to both sides about a fulcrum, and the movable contact is centered on the fulcrum. And rotates to one side to connect to the stationary fixed contact and one load side fixed contact, and to rotate to the other centered on the fulcrum to connect to the preliminary fixed contact and the other load side fixed contact. A switching switch characterized by the above.
において、 前記各接触子に接続される電路の通電状態を検出する過
電流継電器、零相変流器又は零相蓄電器を適宜選択的に
組合せて配設し、各検出結果に基づいて負荷側における
地路事故又は過電流事故を検出して前記可動接触子を中
立位置に回動して切離し、前記地絡事故又は過電流事故
が復旧した後に常用又は予備のいずれかの固定接触子へ
可動接触子を切換えることを特徴とする切換開閉器。3. The switching switch according to claim 1 or 2, wherein an overcurrent relay, a zero-phase current transformer, or a zero-phase power storage device that detects an energized state of an electric path connected to each of the contacts is appropriately selected. Are installed in combination, the ground fault or overcurrent fault on the load side is detected based on each detection result, and the movable contact is turned to a neutral position to disconnect it, and the ground fault or overcurrent fault is caused. A switching switch characterized by switching the movable contact to either the fixed contact of the normal use or the spare after the restoration of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6242283A JP2910026B2 (en) | 1994-09-09 | 1994-09-09 | Switching switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6242283A JP2910026B2 (en) | 1994-09-09 | 1994-09-09 | Switching switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0883534A true JPH0883534A (en) | 1996-03-26 |
| JP2910026B2 JP2910026B2 (en) | 1999-06-23 |
Family
ID=17086960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6242283A Expired - Fee Related JP2910026B2 (en) | 1994-09-09 | 1994-09-09 | Switching switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2910026B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755046A (en) * | 2019-01-15 | 2019-05-14 | 浙江正泰电器股份有限公司 | The contact system of static contact and automatic change-over |
| CN112563049A (en) * | 2020-06-08 | 2021-03-26 | 中车青岛四方机车车辆股份有限公司 | Transfer switch and circuit system |
| CN116741597A (en) * | 2023-06-16 | 2023-09-12 | 国网黑龙江省电力有限公司营销服务中心 | Household power load monitoring device |
-
1994
- 1994-09-09 JP JP6242283A patent/JP2910026B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755046A (en) * | 2019-01-15 | 2019-05-14 | 浙江正泰电器股份有限公司 | The contact system of static contact and automatic change-over |
| CN112563049A (en) * | 2020-06-08 | 2021-03-26 | 中车青岛四方机车车辆股份有限公司 | Transfer switch and circuit system |
| CN112563049B (en) * | 2020-06-08 | 2024-03-22 | 中车青岛四方机车车辆股份有限公司 | Change-over switch and circuit system |
| CN116741597A (en) * | 2023-06-16 | 2023-09-12 | 国网黑龙江省电力有限公司营销服务中心 | Household power load monitoring device |
| CN116741597B (en) * | 2023-06-16 | 2024-01-09 | 国网黑龙江省电力有限公司营销服务中心 | Household power load monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2910026B2 (en) | 1999-06-23 |
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