JPH084657Y2 - Disconnector - Google Patents

Disconnector

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Publication number
JPH084657Y2
JPH084657Y2 JP1989096798U JP9679889U JPH084657Y2 JP H084657 Y2 JPH084657 Y2 JP H084657Y2 JP 1989096798 U JP1989096798 U JP 1989096798U JP 9679889 U JP9679889 U JP 9679889U JP H084657 Y2 JPH084657 Y2 JP H084657Y2
Authority
JP
Japan
Prior art keywords
contact
finger
fixed
finger contact
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP1989096798U
Other languages
Japanese (ja)
Other versions
JPH0335633U (en
Inventor
辰夫 山口
正文 新留
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1989096798U priority Critical patent/JPH084657Y2/en
Publication of JPH0335633U publication Critical patent/JPH0335633U/ja
Application granted granted Critical
Publication of JPH084657Y2 publication Critical patent/JPH084657Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 〔産業上の利用分野〕 この考案は断路器、特に、発電主回路等に用いられる
大電流通電用の断路器に関するものである。
[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a disconnector, and more particularly to a disconnector for energizing a large current used in a power generation main circuit or the like.

〔従来の技術〕[Conventional technology]

第4図は例えば実開昭55-164732号公報第3図および
第4図に示された従来の断路器を示す断面図であり、図
において、(1)は固定フインガーコンタクトであり、
図において水平方向の中心軸を有する円筒状で、右端か
ら破線Aまでの割り込み(図示せず)が円周方向に多数
配設されたフインガー形状になつていて、フインガー
(11)の先端部は内側へ半円形状にふくらんで接触部
(12)を形成している。(2)は固定コンタクト、
(3)は可動フインガーコンタクトであり、固定フイン
ガーコンタクト(1)と同様の形状になつていて、破線
Bまでの割り込み(図示せず)によりフインガー(31)
が形成され、また、その先端部には接触部(32)が形成
されている。
FIG. 4 is a sectional view showing the conventional disconnecting switch shown in FIGS. 3 and 4 of Japanese Utility Model Laid-Open No. 55-164732, for example, in which (1) is a fixed finger contact,
In the figure, it has a cylindrical shape having a central axis in the horizontal direction, and has a finger shape in which a large number of interruptions (not shown) from the right end to the broken line A are arranged in the circumferential direction, and the tip of the finger (11) is The contact portion (12) is bulged inward in a semicircular shape. (2) is a fixed contact,
Reference numeral (3) is a movable finger contact, which has the same shape as the fixed finger contact (1), and the finger (31) is interrupted by an interrupt (not shown) up to the broken line B.
And a contact portion (32) is formed at its tip.

しかし、その径方向の寸法はやや小さくて、外周面が
固定フインガーコンタクト(1)の接触部(12)と摺動
しながら図において左方へ移動して固定フインガーコン
タクト(1)の中に入り込めるようになつている。そし
て、そのベース部(33)は接触部(12)との接触を確実
にするために外側に向つて厚くなつている。接触部(3
2)は図示のように固定コンタクト(2)と接触できる
が、可動フインガーコンタクト(3)が図において左方
へ移動したときには離れるようになつている。(4A),
(4B)は導体で、固定フインガーコンタクト(1)、固
定コンタクト(2)が取り付けられて、これらを支持す
ると共に電気的に接続している。(5)は円板状のフラ
ンジで、可動フインガーコンタクト(3)がボルト
(6)により固定されている。(7)は操作ロツドで、
一方の先端にはフランジ(5)が固定され、他方は図示
しない駆動装置につながつていて、可動フインガーコン
タクト(3)を図において水平方向に駆動できるように
なつている。なお、図を見易くするため、主として断面
部分を示し、他の部分の図示を省略している。(後述の
第1図〜第3図においても同様の図示の省略を行なつて
いる。) 次に動作について説明する。第4図は断路器の投入状
態を示し、固定フインガーコンタクト(1)のフインガ
ー(11)の先端部にある接触部(12)と可動フインガー
コンタクト(3)のベース部(33)とが接触すると共
に、固定コンタクト(2)と可動フインガーコンタクト
(3)のフインガー(31)の先端部にある接触部(32)
とが接触することにより、導体(4A)と(4B)とが固定
フインガーコンタクト(1)、可動フインガーコンタク
ト(3)、固定コンタクト(2)を介して電気的につな
がつている。フインガー(11),(31)の先端部は接触
時には少し外周側に撓んでおり、元の形状に戻ろうとす
る弾性力により接触を確実にしている。上記経路に電流
が流れるとジユール熱等が生じ、特に抵抗の大きい接触
点(8A),(8B)で発熱が大きい。発生した熱は各部の
表面から放散すると共に、大きな断面積を有していて電
気抵抗が小さいために発熱が小さく温度上昇が小さい導
体(4A)などに移動する。また、操作ロツド(7)によ
り可動フインガーコンタクト(3)を図において左方へ
移動させることにより、固定コンタクト(2)と可動フ
インガーコンタクト(3)の接触部(32)が離隔して、
断路器は開極状態になる。
However, its radial dimension is rather small, and the outer peripheral surface slides to the contact portion (12) of the fixed finger contact (1) and moves to the left in the figure to move inside the fixed finger contact (1). It's getting in. The base portion (33) is thickened toward the outside to ensure contact with the contact portion (12). Contact part (3
2) can contact the fixed contact (2) as shown, but is separated when the movable finger contact (3) moves to the left in the figure. (4A),
Reference numeral (4B) is a conductor to which the fixed finger contact (1) and the fixed contact (2) are attached to support and electrically connect them. (5) is a disk-shaped flange, and the movable finger contact (3) is fixed by a bolt (6). (7) is the operation rod,
A flange (5) is fixed to one end, and the other is connected to a drive device (not shown) so that the movable finger contact (3) can be driven in the horizontal direction in the figure. In order to make the drawing easier to see, the cross-sectional portion is mainly shown and the other portions are not shown. (Similar illustrations are omitted in FIGS. 1 to 3 described later.) Next, the operation will be described. FIG. 4 shows a state in which the disconnector is turned on, in which the contact portion (12) at the tip of the finger (11) of the fixed finger contact (1) and the base portion (33) of the movable finger contact (3) are A contact part (32) that is in contact with and is at the tip of the finger (31) of the fixed contact (2) and the movable finger contact (3).
Due to the contact between and, the conductors (4A) and (4B) are electrically connected via the fixed finger contact (1), the movable finger contact (3), and the fixed contact (2). The tips of the fingers (11) and (31) are slightly bent toward the outer periphery when they come into contact with each other, and the elastic force of returning to the original shape ensures the contact. When an electric current flows through the above-mentioned path, Juule heat or the like is generated, and heat is generated particularly at the contact points (8A) and (8B) where resistance is high. The generated heat is dissipated from the surface of each part and moves to a conductor (4A) that has a large cross-sectional area and a small electric resistance, and thus generates a small amount of heat and a small temperature rise. Further, by moving the movable finger contact (3) to the left in the figure by the operation rod (7), the contact portion (32) of the fixed contact (2) and the movable finger contact (3) is separated,
The disconnector is opened.

〔考案が解決しようとする課題〕[Problems to be solved by the device]

従来の断路器は以上のように構成されているので、投
入状態において負荷電流を通電したときに、通電経路の
各部で発熱するが、中でもコンタクト間の接触点では接
触抵抗が比較的大きいので発熱量が大きい。特に、固定
フインガーコンタクトのフインガーの先端部と可動フイ
ンガーコンタクトのベース部との接触点は、2つの導体
間のほぼ中央に位置していて、温度上昇が小さく熱容量
の大きい上記導体への熱伝導による冷却効果が小さいの
で、局部的に著しく温度上昇して弊害が生じることがあ
つた。また、短時間電流通電の際に、大電流による発熱
のために上記の固定フインガーコンタクトと可動フイン
ガーコンタクトとの接触点で部分的な焼き付きが発生す
ることもあるなどの問題点があつた。特に、発電主回路
用の断路器では定格電流(負荷電流)が数キロアンペア
から40キロアンペア程度に及び、また、短時間電流が20
0キロアンペア前後になることもあり、温度上昇は重要
な問題点であつた。
Since the conventional disconnector is configured as described above, when a load current is applied in the closed state, heat is generated in each part of the energizing path, but in particular, the contact resistance at the contact point between the contacts is relatively large, so heat is generated. The amount is large. In particular, the contact point between the tip of the finger of the fixed finger contact and the base of the movable finger contact is located approximately in the center between the two conductors, and the temperature of the conductor is small and the heat of the conductor is large. Since the cooling effect by conduction is small, the temperature may locally rise significantly, which may cause adverse effects. In addition, there is a problem in that, when a current is applied for a short time, partial seizure may occur at the contact point between the fixed finger contact and the movable finger contact due to heat generated by a large current. . In particular, in the disconnector for the main power generation circuit, the rated current (load current) ranges from several kiloamps to 40 kiloamps and the short-time current is 20
Temperature rise was an important issue as it could be around 0 kiloamps.

この考案は上記のような問題点を解消するためになさ
れたもので局部的な著しい温度上昇を防止すると共に、
短時間電流通電時にも焼き付きが発生しない断路器を得
ることを目的とする。
This invention was made in order to solve the above-mentioned problems and prevents a significant local temperature rise.
An object of the present invention is to obtain a disconnecting switch that does not cause seizure even when a current is applied for a short time.

〔課題を解決するための手段〕[Means for solving the problem]

この考案に係る断路器は、固定フインガーコンタクト
のフインガーの全長のうち先端部1/3ないし2/3程度の厚
さを残りの部分よりも厚くすると共に、可動フインガー
コンタクトのベース部の内径をそのフインガーの内径よ
りも小さくすることにより、このフインガーよりも上記
ベース部の厚さを厚くしたものである。
In the disconnector according to the present invention, the thickness of about 1/3 to 2/3 of the tip of the finger of the fixed finger contact is made thicker than the remaining portion, and the inner diameter of the base of the movable finger contact is increased. Is smaller than the inner diameter of the finger, so that the base portion is thicker than the finger.

〔作用〕[Action]

固定フインガーコンタクトと可動フインガーコンタク
トとの接触点に隣接した部分の厚さが厚く、従つて、断
面積が大きくなつているので、その部分の抵抗が小さ
く、そのため、通電による発生ジユール熱が低減し、温
度上昇が低くなると共に、上記接触点から周囲への熱伝
導経路の断面積が大きくなつて接触点で発生した熱が周
囲へ拡散、放散し易くなる。また、短時間電流通電時に
は、上記に加えて上記接触点に隣接した部分の熱容量の
増大により接触点で生じた熱がそれらの部分に容易に伝
導し、吸収される。
Since the thickness of the part adjacent to the contact point between the fixed finger contact and the movable finger contact is thick, and the cross-sectional area is large, the resistance of that part is small, and therefore the heat generated due to energization As a result, the temperature rise is reduced, and the cross-sectional area of the heat conduction path from the contact point to the surrounding is increased, so that the heat generated at the contact point is easily diffused and dissipated to the surroundings. Further, when a current is applied for a short time, in addition to the above, the heat generated at the contact points is easily conducted to and absorbed by those parts due to the increase in the heat capacity of the parts adjacent to the contact points.

〔考案の実施例〕[Example of device]

以下、この考案の一実施例を図について説明する。第
1図はこの考案の一実施例による断路器を示す断面図で
あり、図において、(1)は第4図の場合と同様の固定
フインガーコンタクト、(11)は長さL1のフインガー、
(14)はフインガー(11)の先端部に形成された厚さT2
の厚肉フインガー部で、厚さT1のフインガー(11)の残
りの部分(15)よりも厚くなつており、また、その長さ
L2はL1のほぼ半分になつている。(12)は厚肉フインガ
ー部(14)の先端部に形成された第4図の場合と同様の
接触部である。(3)は第4図の場合と同様の可動フイ
ンガーコイタクト、(31)は内径D1、厚さT3のフインガ
ー、(34)は厚さT4のベース部で、その内径D2はD1より
も小さくなつており、従つて、T4はT3よりも大きくなつ
ている。その他の部分は第4図の場合と同様であるので
説明を省略する。
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a disconnector according to an embodiment of the present invention. In the figure, (1) is a fixed finger contact similar to that of FIG. 4, and (11) is a finger of length L 1 . ,
(14) is the thickness T 2 formed at the tip of the finger (11)
Of the thick-walled finger part of the thicker finger part (11), which is thicker than the remaining part (15) of the finger part (11) of thickness T 1
L 2 is almost half of L 1 . Reference numeral (12) is a contact portion formed at the tip of the thick-walled finger portion (14) as in the case of FIG. (3) is a movable finger coyact similar to that of FIG. 4, (31) is a finger having an inner diameter D 1 and a thickness T 3 , and (34) is a base portion having a thickness T 4 and has an inner diameter D 2 Is smaller than D 1 , and therefore T 4 is larger than T 3 . The other parts are the same as in the case of FIG.

次に動作について説明する。投入、開極の動作は第4
図の場合と同様に操作ロツド(7)により可動フインガ
ーコンタクト(3)を移動させて行う。第2図は第1図
の断路器の部分断面図であり、投入状態を示す。固定フ
インガーコンタクト(1)から接触点(8A)を経て可動
フインガーコンタクト(3)に流れる電流により発熱す
るが、接触点(8A)に隣接した厚肉フインガー部(14)
およびベース部(34)はフィンガー(11)の残りの部分
(15)およびフィンガー(31)に比べて厚さが厚く、従
つて、断面積が大きくなつており、そのため、抵抗が小
さく、これらの部分での発熱量が従来に比べ低減されて
温度上昇が低くなると共に、図中破線矢印で示す接触点
(8A)からの熱伝導経路の断面積が大きくなつているの
で、接触点(8A)で生じた熱は厚肉フインガー部(1
4)、ベース部(34)およびこれらの周囲、例えば発熱
が殆んどないフランジ(5)などへ容易に拡散、放散さ
れる。また、短時間電流通電時には、上記に加えて、厚
肉フインガー部(14)、ベース部(34)は厚くなつた分
だけ熱容量が大きくなつているので、接触点(8A)で生
じる熱は容易にこれらの部分に伝導し、吸収される。
Next, the operation will be described. Operation of opening and closing is 4th
As in the case of the figure, the movable finger contact (3) is moved by the operation rod (7). FIG. 2 is a partial cross-sectional view of the disconnector of FIG. 1, showing a closed state. Heat is generated by the current flowing from the fixed finger contact (1) through the contact point (8A) to the movable finger contact (3), but the thick-walled finger portion (14) adjacent to the contact point (8A).
And the base portion (34) is thicker than the rest of the fingers (11) (15) and fingers (31) and therefore has a larger cross-sectional area, which results in lower resistance and The amount of heat generated in the part is reduced compared to the conventional case, the temperature rise is reduced, and the cross-sectional area of the heat conduction path from the contact point (8A) shown by the broken line arrow in the figure is increased, so the contact point (8A) The heat generated at the thick finger part (1
4), it is easily diffused and dissipated to the base portion (34) and their surroundings, for example, the flange (5) that generates almost no heat. In addition to the above, the heat generated at the contact point (8A) is easy because the heat capacity of the thick-walled finger part (14) and base part (34) is increased by the thicker part when the current is applied for a short time. Are conducted to and absorbed by these parts.

厚肉フインガー部(14)の長さL2はあまり短かすぎる
と接触点(8A)で生じる熱を周囲へ拡散、放散する効果
が小さくなるので、フインガー(11)の全長L1の1/3程
度以上にする。逆に、あまり長すぎると残りの部分(1
5)の長さが短かくなつてフインガー(11)の剛性が大
きくなり、フインガー(11)の撓み量を一定とすると可
動フインガーコンタクト(3)との接触圧力が過大にな
つて摺動による接触面の摩耗やかじりが生じ、更に、フ
インガー(11)の根元(破線Aの箇所)で発生する最大
応力が大きくなつて塑性変形してしまうので、L1の2/3
程度以下にする。また、第4図のベース部(33)も外側
に向つて少し厚くなつているが、大幅に厚くすると摺動
がスムーズにできないので、フインガー(31)の厚さと
大差はない。それでは上記のような熱の拡散、放散の改
善にあまり貢献できないので、第1図,第2図では摺動
に支障を来たさないよう内側に向つて大幅に厚くしてい
る。
If the length L 2 of the thick-walled finger portion (14) is too short, the effect of diffusing and dissipating the heat generated at the contact point (8A) to the surroundings will be small, so 1 / of the total length L 1 of the finger (11) Make it about 3 or more. Conversely, if it is too long, the rest (1
When the length of 5) is short and the rigidity of the finger (11) becomes large, and the amount of bending of the finger (11) is constant, the contact pressure with the movable finger contact (3) becomes too large, causing sliding. wear and galling occurs contact surface, further, the maximum stress generated at the root of Fuinga (11) (position of the broken line a) resulting in increased Do connexion plastic deformation, 2/3 of L 1
Keep it below the level. The base portion (33) in FIG. 4 is also slightly thicker toward the outside, but if it is made too thick, sliding cannot be done smoothly, so there is no great difference from the thickness of the finger (31). Since it does not contribute much to the improvement of the diffusion and dissipation of heat as described above, in FIGS. 1 and 2 the thickness is increased inward so as not to hinder sliding.

第3図はこの考案の他の実施例による部分断面図であ
り、厚肉フインガー部(14)の外周面にフイン(9)が
設けられ、接触点(8A)などで生じる熱がフイン(9)
から放散されるので、局部的な温度上昇防止の効果が大
きい。
FIG. 3 is a partial cross-sectional view according to another embodiment of the present invention, in which a fin (9) is provided on the outer peripheral surface of the thick-walled finger portion (14) so that heat generated at the contact point (8A) or the like is generated by the fin (9). )
The effect of preventing local temperature rise is great.

〔考案の効果〕[Effect of device]

以上のように、この考案によれば、固定フインガーコ
ンタクトと可動フインガーコンタクトとの接触点に隣接
する部分である固定フインガーコンタクトのフインガー
の先端部と可動フインガーコンタクトのベース部の厚さ
を厚くしてこの部分の電気抵抗を小さくして温度上昇を
低くすると共に、接触点からの熱の伝導経路の断面積を
大きくしたので、接触点で生じた熱が固定フインガーコ
ンタクトの先端部、可動フインガーコンタクトのベース
部およびこれらの周囲へ容易に拡散、放散され、従つ
て、局部的な著しい温度上昇が防止される。また、短時
間電流通電時には、上記に加えて、上記接触点に隣接す
る部分の熱容量が大きいので、接触点で生じる熱は容易
に伝導し、吸収され、接触点の金属材料が融点近くまで
温度上昇するのに要する時間が長くなり、従つて、焼き
付きが発生しない。
As described above, according to the present invention, the thickness of the tip of the finger of the fixed finger contact and the thickness of the base of the movable finger contact, which is the portion adjacent to the contact point between the fixed finger contact and the movable finger contact. The heat generated at the contact point is fixed at the tip of the fixed finger contact because the cross section of the heat conduction path from the contact point is made large while making the electric resistance of this part small to reduce the temperature rise. , Is easily diffused and dissipated to and from the base of the movable finger contact and their surroundings, thus preventing a significant local temperature rise. When a short-time current is applied, in addition to the above, since the heat capacity of the portion adjacent to the contact point is large, the heat generated at the contact point is easily conducted and absorbed, and the metal material at the contact point is heated to near the melting point. The time it takes to rise is longer and, consequently, no seizure occurs.

【図面の簡単な説明】[Brief description of drawings]

第1図はこの考案の一実施例による断路器を示す断面
図、第2図は第1図の断路器の部分断面図、第3図はこ
の考案の他の実施例による断路器を示す部分断面図、第
4図は従来の断路器を示す断面図である。 図において(1)は固定フインガーコンタクト、(2)
は固定コンタクト、(3)は可動フインガーコンタク
ト、(11),(31)はフインガー、(12),(32)は接
触部、(14)は厚肉フインガー部、(15)は残りの部
分、(34)はベース部である。 なお、各図中同一符号は同一または相当部分を示す。
1 is a sectional view showing a disconnector according to an embodiment of the present invention, FIG. 2 is a partial sectional view of the disconnector according to FIG. 1, and FIG. 3 is a portion showing a disconnector according to another embodiment of the present invention. FIG. 4 is a sectional view showing a conventional disconnector. In the figure, (1) is a fixed finger contact, (2)
Is a fixed contact, (3) is a movable finger contact, (11) and (31) are fingers, (12) and (32) are contact parts, (14) is a thick finger part, and (15) is the remaining part. , (34) are base parts. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】円筒状の固定フィンガーコンタクト、この
固定フィンガーコンタクトと離隔して対向するように設
けられた固定コンタクト、およびこれらの固定フィンガ
ーコンタクトと固定コンタクトの対向方向に、上記固定
フィンガーコンタクトの内側を移動して投入状態または
開極状態にする円筒状の可動フィンガーコンタクトを備
え、投入状態で上記固定フィンガーコンタクトのフィン
ガーの先端部と上記可動フィンガーコンタクトのベース
部とが接触すると共に、上記固定コンタクトと上記可動
フィンガーコンタクトのフィンガーの先端部とが接触す
るものにおいて、上記可動フィンガーコンタクトのベー
ス部の内径を上記フィンガーコンタクトの他の部分より
小さくして厚さを厚くするとともに、上記可動フィンガ
ーコンタクトの上部ベース部と接触する上記固定フィン
ガーコンタクトの厚肉フィンガー部の内径側の先端部か
ら1/3ないし2/3の範囲の厚さを他の部分より厚くしたこ
とを特徴とする断路器。
1. A cylindrical fixed finger contact, a fixed contact provided so as to be spaced apart and opposed to the fixed finger contact, and an inner side of the fixed finger contact in the facing direction of the fixed finger contact and the fixed contact. Is provided with a cylindrical movable finger contact that is moved to a closed state or an open state, and in the closed state, the tip end of the fixed finger contact and the base portion of the movable finger contact come into contact with each other, and the fixed contact. And the tip of the finger of the movable finger contact, the inner diameter of the base portion of the movable finger contact is made smaller than other portions of the finger contact to increase the thickness, and Up Disconnector, characterized in that a thickness in the range of from 1/3 from the inner diameter side of the distal end portion 2/3 of the thick fingers of the fixed finger contacts thicker than the other portion in contact with the base portion.
JP1989096798U 1989-08-18 1989-08-18 Disconnector Expired - Lifetime JPH084657Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989096798U JPH084657Y2 (en) 1989-08-18 1989-08-18 Disconnector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989096798U JPH084657Y2 (en) 1989-08-18 1989-08-18 Disconnector

Publications (2)

Publication Number Publication Date
JPH0335633U JPH0335633U (en) 1991-04-08
JPH084657Y2 true JPH084657Y2 (en) 1996-02-07

Family

ID=31645979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989096798U Expired - Lifetime JPH084657Y2 (en) 1989-08-18 1989-08-18 Disconnector

Country Status (1)

Country Link
JP (1) JPH084657Y2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5548520Y2 (en) * 1976-06-15 1980-11-13
JPS5611689Y2 (en) * 1976-07-02 1981-03-17

Also Published As

Publication number Publication date
JPH0335633U (en) 1991-04-08

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