JP2779222B2 - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JP2779222B2 JP2779222B2 JP22081489A JP22081489A JP2779222B2 JP 2779222 B2 JP2779222 B2 JP 2779222B2 JP 22081489 A JP22081489 A JP 22081489A JP 22081489 A JP22081489 A JP 22081489A JP 2779222 B2 JP2779222 B2 JP 2779222B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- switch element
- contact portion
- contact
- trip
- 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
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、回路しゃ断器に関するものである。Description: TECHNICAL FIELD The present invention relates to a circuit breaker.
遠隔制御される静止スイッチで負荷電流を開閉し、過
電流や短絡等の異常時に接点部をトリップ開極させるよ
うにした回路しゃ断器は、負荷開閉が無接点方式である
ので開閉寿命が長いという利点があるが、異常時の大電
流に対して静止スイッチを保護する必要がある。A circuit breaker that opens and closes the load current with a remotely controlled static switch and trips the contacts when an abnormality such as an overcurrent or short circuit occurs. There is an advantage, but it is necessary to protect the stationary switch against a large current at the time of abnormality.
また静止スイッチがリレー等の有接点スイッチである
場合にも、異常時の大電流で接点が電磁反発を起こし、
しかもその時のアーク熱で溶着することがあるので同様
に保護する必要がある。Also, when the stationary switch is a contact switch such as a relay, the contact causes electromagnetic repulsion with a large current at the time of abnormality,
In addition, since the welding may be caused by the arc heat at that time, it is necessary to protect the same.
このような従来例（たとえば特開昭59−66030号）を
第11図により説明する。すなわち、この回路しゃ断器
は、第１の端子100および第２の端子101と、前記第１の
端子100および第２の端子101間に直列に接続された負荷
開閉用の静止スイッチ102,接離可能なトリップ開極用の
接点部103および異常電流検出手段104と、前記異常電流
検出手段104の動作に応動してオン状態の前記接点部103
をトリップ開極させる引外し装置105とを備え、トリッ
プ開極時に接点部103の接点間に発生したアークによる
電流を静止スイッチ102に対してバイパスする分岐路106
を設けている。Such a conventional example (for example, JP-A-59-66030) will be described with reference to FIG. That is, the circuit breaker includes a first terminal 100 and a second terminal 101, and a load opening / closing stationary switch 102 connected in series between the first terminal 100 and the second terminal 101. A contact portion 103 for opening a possible trip and an abnormal current detecting means 104; and the contact portion 103 which is turned on in response to the operation of the abnormal current detecting means 104.
And a trip device 106 for tripping the stationary switch 102 with a current generated by an arc generated between the contacts of the contact portion 103 when the trip is opened.
Is provided.
すなわち、異常時に接点部103のトリップ開極により
アークが現れたとき、アークは低インピーダンス側へ移
動する性質を有するため、アークによる電流は分岐路10
6へ転流して分岐路106によるシャント回路を導通状態に
するので、静止スイッチ102に流れる電流を極小に抑え
ることができ、したがって、静止スイッチ102を大電流
から保護することができる。That is, when an arc appears due to the trip opening of the contact portion 103 in an abnormal state, the arc has a property of moving to the low impedance side, so that the current due to the arc is reduced to the branch path 10.
Since the shunt circuit is commutated to 6 and the shunt circuit formed by the branch path 106 is made conductive, the current flowing through the stationary switch 102 can be minimized, and therefore, the stationary switch 102 can be protected from a large current.
また、静止スイッチ102が有接点スイッチである場合
も、前記と同様に転流によって有接点スイッチに流れる
電流を極小に抑えることができ、有接点スイッチを大電
流による電磁反発から保護することができる。Also, in the case where the stationary switch 102 is a contact switch, the current flowing through the contact switch can be minimized by commutation as described above, and the contact switch can be protected from electromagnetic repulsion due to a large current. .
ところが、この回路しゃ断器は、電路に分岐路106を
設ける必要があるため、部品点数が多くなるとともに構
造が複雑になり、部品コストおよび組立コストが高くな
るという欠点があった。However, this circuit breaker has a drawback that the number of components increases, the structure becomes complicated, and the cost of parts and assembly increases because the branch path 106 must be provided in the electric circuit.
したがって、この発明の目的は、部品点数を削減でき
かつ簡単な構造により、異常時にスイッチ素子を保護す
ることができる回路しゃ断器を提供することである。Therefore, an object of the present invention is to provide a circuit breaker that can reduce the number of parts and can protect the switch element at the time of abnormality with a simple structure.
請求項（１）の回路しゃ断器は、たとえば第１図に示
すように、第１の端子１および第２の端子２と、第１の
端子１および第２の端子２間に接続された負荷開閉用の
スイッチ素子３と、このスイッチ素子３とそれに接続さ
れる第１の端子１または第２の端子２との間に挿入され
た接離可能なトリップ開極用の接点部４と、異常電流検
出手段５と、この異常電流検出手段５の動作に応動して
オン状態の接点部４をトリップ開極させる引外し装置６
とを備えた回路しゃ断器において、スイッチ素子３とス
イッチ素子３に接点部４を介さずに接続される第１の端
子１または第２の端子２の間の電路導体25が板状であっ
てその一端が外部接続端子を兼ね、他端がスイッチ素子
３の端子を直接接続する接続部に形成され、前記電路導
体35の中間部を折曲してその折曲部35bを接点部４に接
近させることにより、トリップ時に接点部４に発生した
アークのアーク端のうち、スイッチ素子３に電気的に近
い方の接点側のアーク端を電路導体35に飛び移らせたこ
とを特徴とするものである。A circuit breaker according to claim 1 is, for example, a load connected between a first terminal 1 and a second terminal 2 and between the first terminal 1 and the second terminal 2 as shown in FIG. A switching element 3 for opening and closing, a contact part 4 for opening and closing a trip that can be detached and inserted between the switching element 3 and the first terminal 1 or the second terminal 2 connected thereto; Current detection means 5 and a trip device 6 for trip-opening the contact portion 4 in the ON state in response to the operation of the abnormal current detection means 5
And the circuit conductor 25 between the switch element 3 and the first terminal 1 or the second terminal 2 connected to the switch element 3 without the intermediary of the contact part 4 is plate-shaped. One end is also used as an external connection terminal, and the other end is formed as a connection part for directly connecting the terminal of the switch element 3. The intermediate part of the electric circuit conductor 35 is bent and the bent part 35 b approaches the contact part 4. In this way, of the arc ends of the arc generated at the contact portion 4 at the time of the trip, the arc end on the contact side which is electrically closer to the switch element 3 is jumped to the circuit conductor 35. is there.
請求項（２）の回路しゃ断器は、たとえば第８図およ
び第９図に示すように、第１の端子１および第２の端子
２と、前記第１の端子１と電気的に接続された第３の端
子60と、前記第２の端子２と電気的に接続された第４の
端子61と、前第１の端子１と前記第３の端子60の間に挿
入された接離可能なトリップ開極用の接点部４と、異常
電流検出手段５と、前記異常電流検出手段５の動作に応
動してオン状態の前記接点部４をトリップ開極させる引
外し装置６と、前記第３の端子60と前記第４の端子61の
間に接続された負荷開閉用のスイッチ素子３とを備え、
前記第２の端子２と前記第４の端子61の間の電路導体が
板状であってその中間部を前記接点部に接近する形状お
よび配置にしたものである。The circuit breaker according to claim (2) is electrically connected to the first terminal 1 and the second terminal 2 and the first terminal 1 as shown in FIGS. 8 and 9, for example. A third terminal 60, a fourth terminal 61 electrically connected to the second terminal 2, and a contactable / separable type inserted between the first terminal 1 and the third terminal 60. A contact portion 4 for trip opening, an abnormal current detecting means 5, a trip device 6 for trip-opening the ON contact portion 4 in response to the operation of the abnormal current detecting means 5, and the third And a load switching element 3 connected between the terminal 60 and the fourth terminal 61,
An electric conductor between the second terminal 2 and the fourth terminal 61 is plate-shaped, and an intermediate portion thereof is formed in a shape and arrangement close to the contact portion.
請求項（３）の回路しゃ断器は、たとえば第10図に示
すように、第１の端子１および第２の端子２と、前記第
１の端子１と電気的に接続されて負荷開閉用のスイッチ
素子３の一端を接続する接続部となる第３の端子60と、
前記第２の端子２と電気的に接続されて前記負荷開閉用
のスイッチ素子35の他端を接続する接続部となる第４の
端子61と、前記第１の端子１と前記第３の端子60の間に
挿入された接離可能なトリップ開極用の接点部４と、異
常電検出手段５と、前記異常電流検出手段５の動作に応
動してオン状態の前記接点部４をトリップ開極させる引
外し装置６とを備え、前記第２の端子２と前記第４の端
子61の間の電路導体が板状であってその中間部を前記接
点部に接近する形状および配置にしたものである。The circuit breaker according to claim 3 is, for example, as shown in FIG. 10, a first terminal 1 and a second terminal 2, and electrically connected to the first terminal 1 for switching a load. A third terminal 60 serving as a connection part for connecting one end of the switch element 3;
A fourth terminal 61 which is electrically connected to the second terminal 2 and serves as a connection portion for connecting the other end of the load switching switch element 35; the first terminal 1 and the third terminal; In response to the operations of the abnormal contact detecting means 5 and the abnormal current detecting means 5, the ON contact part 4 is tripped and opened. A tripping device 6 for making a pole, wherein an electric conductor between the second terminal 2 and the fourth terminal 61 is plate-shaped, and an intermediate portion thereof is shaped and arranged to approach the contact portion. It is.
〔作用〕 請求項（１）の回路しゃ断器によれば、スイッチ素子
に制御信号を供給するとスイッチ素子が制御信号に応じ
てオンまたはオフに動作し、これにより負荷が制御され
る。また異常電流検出手段が動作することにより引外し
装置が動作し、接点部がトリップ開極する。このとき、
接点部の接点間にアークが発生すると、アークの一方の
アーク端が電路導体の一部に飛び移り、アークによる電
流が電路導体に転流してスイッチ素子をバイパスする。
このためスイッチ素子にはアークによる大電流が流れ
ず、スイッチ素子は保護されることとなる。[Operation] According to the circuit breaker of claim (1), when a control signal is supplied to the switch element, the switch element is turned on or off in accordance with the control signal, thereby controlling the load. In addition, the tripping device is operated by the operation of the abnormal current detection means, and the contact portion is trip-opened. At this time,
When an arc is generated between the contacts of the contact portion, one arc end of the arc jumps to a part of the circuit conductor, and the current caused by the arc is diverted to the circuit conductor to bypass the switch element.
Therefore, a large current due to the arc does not flow through the switch element, and the switch element is protected.
この場合、電路導体が板状であってその一端が外部接
続端子を兼ね、他端がスイッチ素子の端子を直接接続す
る接続部に形成され、前記電路導体の中間部を折曲して
その折曲部を前記接点部に接近させることにより、アー
クによる電流をスイッチ素子に対してバイパスできるよ
うにして、過電流耐量の小さいスイッチ素子への過電流
の通過を極小に抑えて半導体スイッチ素子を熱ストレス
から保護できるとともに、リレーのような有接点素子を
スイッチ素子として使用する場合でも、リレーの接点を
過電流が通過して接点の電磁反発が生じ、そのとき発生
するアークにより接点が溶接するという問題も解決で
き、いずれも従来例のように分岐路を設ける必要がな
く、したがって従来例と比較して部品点数を削減でき、
かつ構造が簡単になり、その結果組立容易になり、低コ
ストになる。In this case, the circuit conductor is plate-shaped, and one end thereof also serves as an external connection terminal, and the other end is formed at a connection portion directly connecting the terminal of the switch element. By bringing the curved portion close to the contact portion, the current caused by the arc can be bypassed to the switch element, and the passage of the overcurrent to the switch element having a small overcurrent tolerance is minimized to heat the semiconductor switch element. In addition to being able to protect against stress, even when a contact element such as a relay is used as a switch element, an overcurrent passes through the relay contact, causing electromagnetic repulsion of the contact, and the arc generated at that time causes the contact to be welded. Problems can also be solved, and in each case there is no need to provide a branch path as in the conventional example, so the number of parts can be reduced compared to the conventional example,
In addition, the structure is simple, resulting in easy assembly and low cost.
請求項（２）の回路しゃ断器によれば、請求項（１）
の作用のほか、第３の端子および第４の端子間にスイッ
チ素子を接続するため、スイッチ素子の着脱が容易にな
る。According to the circuit breaker of claim (2), claim (1)
In addition to the above operation, since the switch element is connected between the third terminal and the fourth terminal, the switch element can be easily attached and detached.
請求項（３）の回路しゃ断器によれば、第３の端子お
よび第４の端子間にスイッチ素子を接続することによ
り、請求項（１）の作用が得られるほか、ユーザ等によ
るスイッチ素子の外付け等の接続が可能となり、スイッ
チ素子を保護しながら事故電流をしゃ断できる。According to the circuit breaker of claim (3), by connecting the switch element between the third terminal and the fourth terminal, the function of claim (1) can be obtained, and the switch element can be operated by a user or the like. External connection is possible, and the fault current can be cut off while protecting the switch element.
この発明の第１の実施例を第１図ないし第３図に基づ
いて説明する。すなわち、この回路しゃ断器は、第１の
端子1,第２の端子2,スイッチ素子3,接点部4,異常電流検
出手段5,引外し装置６を有する。A first embodiment of the present invention will be described with reference to FIGS. That is, this circuit breaker has a first terminal 1, a second terminal 2, a switch element 3, a contact part 4, an abnormal current detecting means 5, and a trip device 6.
第１の端子１は負荷側端子を実施例とし、第２の端子
２は電源側端子を実施例としている。In the embodiment, the first terminal 1 is a load side terminal, and the second terminal 2 is a power supply side terminal.
スイッチ素子3,接点部４および異常電流検出手段５は
第１の端子および第２の端子２間に接続されている。The switch element 3, the contact part 4, and the abnormal current detecting means 5 are connected between the first terminal and the second terminal 2.
スイッチ素子３は負荷開閉用であり、静止スイッチで
ある半導体スイッチング素子である。The switch element 3 is a semiconductor switching element for switching a load and a static switch.
接点部４は第１の端子１および第２の端子２の間に挿
入された接離可能なトリップ開極用であり、可動接点７
と固定接点８からなり、可動接点７は開閉動作する可動
接触子９に設けられている。The contact portion 4 is used for opening and closing a detachable trip inserted between the first terminal 1 and the second terminal 2.
The movable contact 7 is provided on a movable contact 9 that opens and closes.
可動接触子９は中間部が軸10により支持され、先端部
に可動接点７が設けられ、後端部が異常電流検出手段５
の強制開極棒11に対向するとともに、開極ばね12が異常
電流検出手段５に支持されて可動接触子９を開極付勢し
ている。The movable contact 9 has an intermediate portion supported by a shaft 10, a movable contact 7 provided at a front end, and an abnormal current detecting means 5 provided at a rear end.
And the opening spring 12 is supported by the abnormal current detecting means 5 to urge the movable contact 9 to open.
固定接点８は固定接触子45に固着され、固定接触子45
の端部にナント37によりスイッチ素子３の一端が接続さ
れている。The fixed contact 8 is fixed to the fixed contact 45, and the fixed contact 45
Is connected to one end of the switch element 3 by a non-connect 37.
異常電流検出手段５は電磁石を実施例とし、コイル13
と、ヨーク14と，コイル筒15と，復帰ばね16と，つば17
の付たいプランジャ30とを有する。The abnormal current detecting means 5 is an electromagnet in the embodiment, and the coil 13
, Yoke 14, coil cylinder 15, return spring 16, collar 17
And a plunger 30 to be attached.
引外し装置６は、異常電流検出手段５の動作に応動し
てオン状態の接点部４をトリップ開極させる。実施例の
引外し装置６は、可動接触子９を開極付勢する開極ばね
12と、第２図に示すように中間部が軸19に支持され復帰
ばね20により復帰付勢されて異常電流検出手段５の動作
に応動する応動部18a,18cを有する引外しリンク18と、
開極ばね12の作用により可動体22を介して可動接触子９
に中間部が押圧されて一端が前記引外しリンク18の係止
受け部18bに係止し他端がフレーム23のスリット24を移
動可能な軸25に連結されたラッチリンク26と、このラッ
チリンク26の軸25に一端が連結されたリンク27と、軸28
に軸支されてばね29により一方向に付勢されるとともに
リセット突起31を有しかつ前記リンク27の他端に連結さ
れて接点部４のリセットおよび電路の手動開閉機能を有
するハンドル32からなる。またラッチリンク26には板ば
ねを実施例とする接点圧付与ばね33が設けられている。The tripping device 6 trips and opens the contact portion 4 in the ON state in response to the operation of the abnormal current detecting means 5. The trip device 6 according to the embodiment includes an opening spring that biases the movable contact 9 to open.
2, a trip link 18 having reaction portions 18a and 18c whose intermediate portion is supported by a shaft 19 and is urged by a return spring 20 to return in response to the operation of the abnormal current detecting means 5, as shown in FIG.
The movable contact 9 is moved via the movable body 22 by the action of the opening spring 12.
A latch link 26 having one end locked to the lock receiving portion 18b of the tripping link 18 and the other end connected to a shaft 25 that can move through the slit 24 of the frame 23; A link 27 having one end connected to a shaft 25 of 26, and a shaft 28
A handle 32 having a reset projection 31 and being connected to the other end of the link 27 and having a function of resetting the contact portion 4 and manually opening and closing the electric circuit. . Further, the latch link 26 is provided with a contact pressure applying spring 33 of which a leaf spring is used as an embodiment.
34は異常電流検出手段５のうち過電流検出するバイメ
タルであり、引外しリンク18の応動部18cに対向してい
る。Reference numeral 34 denotes a bimetal for detecting an overcurrent in the abnormal current detection means 5, which faces the responsive portion 18 c of the trip link 18.
そして、スイッチ素子３とスイッチ素子３に接続され
る第２の端子２の一方との間に設けた電路導体35を接点
部４に接近させることにより、トリップ開極時に接点部
４に発生したアークＡの固定接点８側のアーク端を電路
導体35に飛び移らせている。すなわち、電路導体35は第
１図に示すように板状であって、一端部が第２の端子２
の一部を構成する外部接続端子を兼ねて第２の端子２に
接続され、中間部にＺ字形折曲部35aとＬ字形折曲部35b
を形成し、他端部にスイッチ素子３を直接接続する接続
部に形成し、Ｌ字形折曲部35bが接点部４に接近してい
る。36はスイッチ素子３の取付用ねじ棒、37はナットで
ある。Then, by causing the electric circuit conductor 35 provided between the switch element 3 and one of the second terminals 2 connected to the switch element 3 to approach the contact part 4, the arc generated at the contact part 4 when the trip is opened. The arc end on the fixed contact 8 side of A is jumped to the electric circuit conductor 35. That is, the circuit conductor 35 is plate-shaped as shown in FIG.
Are connected to the second terminal 2 which also serves as an external connection terminal constituting a part of the Z-shaped bent portion 35a and the L-shaped bent portion 35b in the middle.
Is formed at a connecting portion for directly connecting the switch element 3 to the other end, and the L-shaped bent portion 35b is close to the contact portion 4. 36 is a threaded rod for mounting the switch element 3, and 37 is a nut.
この回路しゃ断器の電路は、第２の端子2,電路導体3
5,スイッチ素子3,接点部4,可とう電線38,異常電流検出
手段５のバイメタル34,可とう電線46,異常電流検出手段
５のコイル13,第１の端子１となる。The circuit of this circuit breaker is composed of a second terminal 2, a circuit conductor 3
5, the switching element 3, the contact portion 4, the flexible wire 38, the bimetal 34 of the abnormal current detecting means 5, the flexible wire 46, the coil 13 of the abnormal current detecting means 5, and the first terminal 1.
なお、39は消弧グリッドで電路導体35上に設置されて
いる。40はバイメタル34のギャップ調整ねじ、41はフレ
ーム23の取付ねじ、42は外殻を構成するカバー43とベー
ス44とを連結する連結ピン、47は可動体22を摺動可能に
支持するフレーム23のスリットである。In addition, reference numeral 39 denotes an arc-extinguishing grid which is installed on the circuit conductor 35. 40 is a gap adjusting screw of the bimetal 34, 41 is a mounting screw of the frame 23, 42 is a connecting pin connecting the cover 43 and the base 44 constituting an outer shell, and 47 is a frame 23 slidably supporting the movable body 22. It is a slit.
この回路しゃ断器は、ハンドル32を第２図の想像線の
状態に倒すことによりオンとなる。すなわち、リンク27
が下降し軸25がスリット24を下降しラッチリンク26が係
止受け部18b側を支点に回動して可動体22を押し下げ、
そのため可動接触子９が軸10を中心に開極ばね12に抗し
て回動し、可動接点７が固定接点８に接触し、スイッチ
素子３に電力が供給される。定格電流が流れている間は
引外し装置６はトリップ動作せず、またハンドル32を第
２図の実線の位置へ操作することにより前記と反対の動
作で可動接点７が固定接点８から開離する。このように
この実施例は、ハンドル32の操作によって電気回路を開
閉できる他、ハンドル32のオン時に制御回路50（第３
図）からの制御信号によってスイッチ素子３を制御する
ことにより回路を開閉することができる。The circuit breaker is turned on by tilting the handle 32 to the state of the imaginary line in FIG. That is, link 27
Is lowered, the shaft 25 moves down the slit 24, and the latch link 26 pivots around the locking receiving portion 18b to push down the movable body 22,
Therefore, the movable contact 9 rotates about the shaft 10 against the opening spring 12, the movable contact 7 contacts the fixed contact 8, and power is supplied to the switch element 3. The tripping device 6 does not trip while the rated current is flowing, and the movable contact 7 is separated from the fixed contact 8 in the opposite operation by operating the handle 32 to the position shown by the solid line in FIG. I do. As described above, in this embodiment, the electric circuit can be opened and closed by operating the handle 32, and the control circuit 50 (the third
The circuit can be opened and closed by controlling the switch element 3 by the control signal from FIG.
一方、小さい過電流による異常電流が流れると、バイ
メタル34が動作して引外しリンク18の応動部18cを押
し、引外しリンク18が軸19のまわりを回動してラッチリ
ンク26から係止受け部18bが離れ、ラッチリンク26は開
極ばね12により軸25を中心に押し上げられて可動接触子
９が開極し、引外し装置６はトリップ状態となる。On the other hand, when an abnormal current due to a small overcurrent flows, the bimetal 34 operates to push the responsive portion 18c of the tripping link 18, and the tripping link 18 rotates around the shaft 19 and receives the latch from the latch link 26. The part 18b is separated, the latch link 26 is pushed up about the shaft 25 by the opening spring 12, the movable contact 9 is opened, and the tripping device 6 is tripped.
また大きい異常電流が流れると異常電流検出手段５の
プランジャ30がコイル13の励磁吸引力に吸引されて、可
動接触子９の強制開極棒11による開極動作、および引外
し装置６の動作による可動接触子９のトリップ開極動作
が順次行われる。すなわち、プランジャ30が動作すると
引外しリンク18の応動部18aを押すと同時に、プランジ
ャ30の他端部の強制開極棒11で可動接触子９の後端部を
接点圧付与ばね33に抗して押すため、可動接点７が固定
接点８から離れる。そして引外しリンク18の引外しによ
りラッチリンク26が前記と同じように動作して可動接点
９が機械的に遅れてトリップ開極する。When a large abnormal current flows, the plunger 30 of the abnormal current detecting means 5 is attracted by the exciting attraction of the coil 13, and the movable contact 9 is opened by the forcibly opening rod 11 and by the operation of the tripping device 6. The trip opening operation of the movable contact 9 is sequentially performed. That is, when the plunger 30 operates, the reaction portion 18a of the trip link 18 is pressed, and at the same time, the rear end of the movable contact 9 is pressed against the contact pressure applying spring 33 by the forcible opening rod 11 at the other end of the plunger 30. As a result, the movable contact 7 separates from the fixed contact 8. When the trip link 18 is tripped, the latch link 26 operates in the same manner as described above, and the movable contact 9 is trip-opened with a mechanical delay.
また、引外し装置６が動作して可動接点７と固定接点
８が開離したとき、過電流の大きさにしたがって、可動
接点７と固定接点８間にアークＡが発生するが、このア
ークＡの固定接点８側のアーク端は第３図の（ａ）〜
（ｃ）のように固定接点８の近傍を通っている電路導体
35の一部へただちに飛び移りアークＡにより電流が転流
する。このように転流するのは、アークＡがインピーダ
ンスの低い回路の方へ転流しやすい性質にしたがって、
第２の端子２→電路導体35→スイッチ素子３→固定接点
８→アークＡ→可動接点７→可動接触子９の経路より
も、第２の端子２→電路導体35→アークＡ→可動接点８
の経路の方が回路のインピーダンスが低いためである。
このようにして電路導体35へ飛び移ったアークＡは消弧
グリッド39によって消弧され、過電流はしゃ断される。When the tripping device 6 operates to separate the movable contact 7 and the fixed contact 8, an arc A is generated between the movable contact 7 and the fixed contact 8 in accordance with the magnitude of the overcurrent. The arc ends on the fixed contact 8 side of FIG.
An electric circuit conductor passing near the fixed contact 8 as shown in FIG.
Immediately jumps to a part of 35 and the current is commutated by arc A. The commutation is performed according to the property that the arc A is easily commutated toward a circuit having a low impedance.
From the route of the second terminal 2 → circuit conductor 35 → switch element 3 → fixed contact 8 → arc A → movable contact 7 → movable contact 9, the second terminal 2 → circuit conductor 35 → arc A → movable contact 8
This is because the impedance of the circuit is lower in the path.
The arc A jumped to the circuit conductor 35 in this way is extinguished by the arc extinguishing grid 39, and the overcurrent is cut off.
トリップ開極した接点部４のリセットはハンドル32を
第２図の実線の状態にオフ側に倒すことにより達成され
る。すなわち、ハンドル32を通すとリセット突起31でラ
ッチリング26を押し下げ、すでに復帰ばね20により復帰
している引外しリンク18の係止受け部18bにラッチリン
ク26の端部を係止し、これにより第２図のリセット状態
となる。The reset of the contact portion 4 after the trip is opened is achieved by moving the handle 32 to the off side in the state of the solid line in FIG. That is, when the handle 32 is passed through, the latch ring 26 is pushed down by the reset projection 31, and the end of the latch link 26 is locked by the locking receiving portion 18 b of the trip link 18 which has already been returned by the return spring 20, The reset state is as shown in FIG.
第４図はこの回路しゃ断器の電流・電圧の特性図であ
る。図で、Q1は回路の異常電流、Q2は回路しゃ断器の動
作時の回路電流、Q3はスイッチ素子３に流れる電流、Q4
はアーク電圧であり、点Ｘでアークの転流が完了するこ
とを示している。この図から、この回路しゃ断器はスイ
ッチ素子３に流れる過電流を極小に抑えられることが可
能であり、従ってスイッチ素子３を確実に保護できるこ
とがわかる。FIG. 4 is a current / voltage characteristic diagram of the circuit breaker. In Figure, Q 1 is the circuit of the abnormal current, Q 2 is circuit current during operation of the circuit breaker, Q 3 is current flowing through the switching element 3, Q 4
Is the arc voltage, indicating that the commutation of the arc is completed at point X. From this figure, it can be seen that this circuit breaker can minimize the overcurrent flowing through the switch element 3, and thus can reliably protect the switch element 3.
このように、この実施例によれば、スイッチ素子３に
制御信号を供給するとスイッチ素子３が制御信号に応じ
てオンまたはオフに動作し、これにより負荷が制御され
る。また異常電流検出手段５が動作することにより引外
し装置６が動作し、接点部４がトリップ開極するこのと
き、接点部４の接点間にアークＡが発生すると、アーク
Ａの一方のアーク端が電路導体35の一部に飛び移り、ア
ークＡによる電流が電路導体35に転流してスイッチ素子
３をバイパスする。このためスイッチ素子３にはアーク
Ａによる大電流が流れず、スイッチ素子３は保護される
こととなる。Thus, according to this embodiment, when a control signal is supplied to the switch element 3, the switch element 3 is turned on or off in accordance with the control signal, thereby controlling the load. In addition, when the abnormal current detecting means 5 operates, the trip device 6 operates, and the contact portion 4 trips and opens. At this time, if an arc A occurs between the contacts of the contact portion 4, one of the arc ends of the arc A Jumps to a part of the circuit conductor 35, and the current caused by the arc A is diverted to the circuit conductor 35 to bypass the switch element 3. Therefore, a large current due to the arc A does not flow through the switch element 3, and the switch element 3 is protected.
この場合、板状の電路導体の中間部を接点部に接近す
る形状および配置にすることによりアークによる電流を
スイッチ素子３に対してバイパスできるので、従来例の
ように分岐路を設ける必要がなく、したがって従来例と
比較して部品点数を削減でき、かつ構造が簡単になり、
その結果組立容易なり、低コストになる。In this case, the current generated by the arc can be bypassed to the switch element 3 by arranging the middle portion of the plate-shaped conductor on the shape and arrangement close to the contact portion. Therefore, the number of parts can be reduced as compared with the conventional example, and the structure is simplified,
As a result, assembly becomes easy and the cost is reduced.
なお、前記実施例は第１の端子１とスイッチ素子３と
の間に接点部４を設けたが、第２の端子２とスイッチ素
子３との間に接点部４を設け、第１の端子１とスイッチ
素子３との間の電路導体を接点部４に接近する構成にし
てもよい。In the above-described embodiment, the contact 4 is provided between the first terminal 1 and the switch element 3. However, the contact 4 is provided between the second terminal 2 and the switch 3, and the first terminal is provided. A configuration may be adopted in which the electric circuit conductor between 1 and the switch element 3 approaches the contact portion 4.
この発明の第２の実施例を第５図に示す。すなわち、
この回路しゃ断器は、前記実施例がアークによる電流を
固定接点８側に接続されたスイッチ素子３のみ転流させ
る方式であったのに対して、可動接点７側に接続された
異常電流検出手段５も転流させる方式であり、第１の端
子１と消弧グリッド39との間でしかも一部が接点部４の
近傍に接近するようにアークランナ51を設けたものであ
る。FIG. 5 shows a second embodiment of the present invention. That is,
In this circuit breaker, the abnormal current detecting means connected to the movable contact 7 is used, whereas the above-described embodiment uses a method in which the current caused by the arc is commutated only by the switch element 3 connected to the fixed contact 8. 5 is also a commutation type, in which an arc runner 51 is provided between the first terminal 1 and the arc-extinguishing grid 39 so that a part thereof approaches the vicinity of the contact portion 4.
過電流によって引外し装置６が動作して接点部４がト
リップ開極し、可動接点７および固定接点８間にアーク
が発生すると、先の第１の実施例の場合と同様の理由に
より、固定接点８上のアークのアーク端は電路導体35の
一部へ飛び移り、また可動接点７上のアークＡのアーク
端はアークランナ51へ転流した後消弧グリッド39によっ
て消弧されて過電流は遮断される。この場合も、第１の
実施例と同様にスイッチ素子３に流れるアークＡによる
過電流を極小に抑えることができ、しかもスイッチ素子
３をバイパスする構成は第１の実施例と同様であるの
で、第１の実施例と同様の効果がある。なお、可動接点
７からアークランナ51へのアークの飛び移りは遅くても
スイッチ素子３の保護に影響されない。When the tripping device 6 operates due to the overcurrent and the contact portion 4 trips and the arc is generated between the movable contact 7 and the fixed contact 8, the tripping device 6 is fixed for the same reason as in the first embodiment. The arc end of the arc on the contact 8 jumps to a part of the circuit conductor 35, and the arc end of the arc A on the movable contact 7 is diverted to the arc runner 51 and then extinguished by the arc extinguishing grid 39 so that the overcurrent is reduced. Will be shut off. Also in this case, as in the first embodiment, the overcurrent due to the arc A flowing through the switch element 3 can be minimized, and the configuration for bypassing the switch element 3 is the same as that of the first embodiment. There is an effect similar to that of the first embodiment. The jump of the arc from the movable contact 7 to the arc runner 51 is not affected by the protection of the switch element 3 even if it is slow.
この発明の第３の実施例を第６図に示す。すなわち、
この回路しゃ断器は、可動接点７と第１の端子１間にス
イッチ素子３を挿入し、異常時に可動接点７側のアーク
Ａのアーク端がスイッチ素子３の接点部４側と反対側の
電路導体35の一部へ転流してスイッチ素子３をバイパス
し、過電流から保護する構成としてたものである。52は
固定接点８のアーク走行板である。FIG. 6 shows a third embodiment of the present invention. That is,
In this circuit breaker, a switch element 3 is inserted between a movable contact 7 and a first terminal 1, and when an abnormality occurs, an arc end of an arc A on the movable contact 7 side is connected to an electric circuit on a side opposite to the contact portion 4 side of the switch element 3. The configuration is such that commutation to a part of the conductor 35 bypasses the switch element 3 and protects it from overcurrent. Reference numeral 52 denotes an arc traveling plate of the fixed contact 8.
この発明の第４の実施例を第７図に示す。すなわち、
この回路しゃ断器は、第３の実施例において消弧グリッ
ド39を第２の端子２と固定接点８の間の電路導体53に設
けて前記アーク走行板52を省略したものである。FIG. 7 shows a fourth embodiment of the present invention. That is,
In this circuit breaker, an arc extinguishing grid 39 is provided in a conductor 53 between a second terminal 2 and a fixed contact 8 in the third embodiment, and the arc traveling plate 52 is omitted.
なお、前記異常電流検出手段５は異常電流を検出して
検出信号を出力し、また引外し装置６をその検出信号に
応じて駆動電力を受ける引外しコイルとし、引外しコイ
ルにより直接接点部４をトリップ開極するものでもよ
い。The abnormal current detecting means 5 detects an abnormal current and outputs a detection signal, and the tripping device 6 is a tripping coil for receiving driving power in accordance with the detection signal. The trip opening may be performed.
この発明の第５の実施例を第８図に示す。すなわち、
この回路しゃ断器は、スイッチ素子３として有接点のリ
レーを実施例とするものであって、リレーの負荷開閉用
の一対の接点67,68と電気的に接続された第３の端子60
および第４の端子61がそれぞれ第１の端子１側となる固
定接触子45の端部および第２の端子２側となる電路導体
35の接点部４に接近しているＬ字形折曲部35bよりも第
２の端子２から遠い側に編み線64,65によって電気的に
接続されている。FIG. 8 shows a fifth embodiment of the present invention. That is,
In this circuit breaker, a contact relay is used as the switch element 3 as an embodiment, and a third terminal 60 electrically connected to a pair of contacts 67 and 68 for switching the load of the relay.
And the conductor of the fixed contact 45 on which the fourth terminal 61 is on the first terminal 1 side and the electric circuit conductor on which the second terminal 61 is on the second terminal 2 side
The L-shaped bent portion 35b approaching the contact portion 4 of 35 is electrically connected to the side farther from the second terminal 2 by braided wires 64 and 65.
62はリレー３の接点67,68をオンオフにする電磁石装
置であり、その巻線の両端63は回路しゃ断器の底面に設
けられた貫通孔66から外部へ引き出されており、外部よ
りこの巻線の両端63に信号を与えることにより負荷を開
閉できるようになっている。異常時の大電流発生に際し
ては第１の実施例と同様、可動接点７と固定接点８との
間に発生したアークの固定接点８側のアーク端が電路導
体35の一部に飛び移りアークによる電流が電路導体35に
転流してリレーの接点67,68をバイパスする。このため
リレーの接点67,68には大電流が流れず、リレー３は保
護されることになる。Reference numeral 62 denotes an electromagnet device for turning on and off the contacts 67 and 68 of the relay 3. Both ends 63 of the winding are drawn out through a through hole 66 provided on the bottom surface of the circuit breaker. The load can be opened and closed by giving a signal to both ends 63 of the load. When a large current is generated at the time of an abnormality, the arc end on the fixed contact 8 side of the arc generated between the movable contact 7 and the fixed contact 8 jumps to a part of the circuit conductor 35 as in the first embodiment. The current is commutated to the circuit conductor 35, bypassing the relay contacts 67, 68. Therefore, a large current does not flow through the contacts 67 and 68 of the relay, and the relay 3 is protected.
この実施例によれば、第３の端子60および第４の端子
61間にスイッチ素子３を接続するため、スイッチ素子３
の着脱が容易になる。According to this embodiment, the third terminal 60 and the fourth terminal
To connect the switch element 3 between 61, switch element 3
Can be easily attached and detached.
なお、この実施例では接点部４が第１の端子１と第３
の端子60との間に設けられているが、第１の端子１と第
２の端子２とが入れ換わった場合、たとえば図で接点部
４を第２の端子２と第４の端子61との間に設けて、第１
の端子１と第３の端子60との間の電路導体を接点部４に
接近するようにしてもよい。In this embodiment, the contact portion 4 is connected to the first terminal 1 and the third terminal 3.
However, when the first terminal 1 and the second terminal 2 are exchanged, for example, the contact portion 4 is connected to the second terminal 2 and the fourth terminal 61 in FIG. Between the first
The electric circuit conductor between the first terminal 3 and the third terminal 60 may approach the contact portion 4.
この発明の第６の実施例を第９図に示す。すなわち、
この回路しゃ断器は、リレーを実施例とするスイッチ素
子３がカバー43とベース44からなる外殻の外部に配置さ
れた場合である。この場合、第３の端子60および第４の
端子61は外殻内の固定接触子45および電路導体35に一体
形成されている。FIG. 9 shows a sixth embodiment of the present invention. That is,
This circuit breaker is a case where the switching element 3 of which the embodiment is a relay is disposed outside the outer shell composed of the cover 43 and the base 44. In this case, the third terminal 60 and the fourth terminal 61 are formed integrally with the fixed contact 45 and the conductor 35 in the outer shell.
この発明の第７の実施例を第10図に示す。すなわち、
この回路しゃ断器は、固定接触子45の端部および電路導
体35の接点部４に接近しているＬ字形折曲部35bよりも
第２の端子から遠い側よりそれぞれ貫通孔66を通してリ
ード線70,71で外殻の外部へ引き出し、そのリード線70,
71に第３の端子60および第４の端子61を接続し、第３の
端子60および第４の端子61をスイッチ素子（図示せず）
の接続部としたものである。FIG. 10 shows a seventh embodiment of the present invention. That is,
This circuit breaker is connected to a lead wire 70 through a through-hole 66 from a side farther from the second terminal than the L-shaped bent portion 35b approaching the end of the fixed contact 45 and the contact 4 of the circuit conductor 35. , 71, the wire is pulled out of the outer shell and its lead wire 70,
The third terminal 60 and the fourth terminal 61 are connected to 71, and the third terminal 60 and the fourth terminal 61 are connected to a switch element (not shown).
It is a connection part.
なお、前記スイッチ素子はコンタクタでもよい。 Note that the switch element may be a contactor.
請求項（１）の回路しゃ断器は、電路導体が板状であ
ってその一端が外部接続端子を兼ね、他端がスイッチ素
子の端子を直接接続する接続部に形成され、前記電路導
体の中間部を折曲してその折曲部を前記接点部に接近さ
せることによリ、アークによる電流をスイッチ素子に対
してバイパスできるようにして、過電流耐量の小さいス
イッチ素子への過電流の通過を極小に抑えて半導体スイ
ッチ素子を熱ストレスから保護できるとともに、リレー
のような有接点素子をスイッチ素子として使用する場合
でも、リレーの接点を過電流が通過して接点の電磁反発
が生じ、そのとき発生するアークにより接点が溶着する
という問題も解決でき、いずれも従来例のように分岐路
の設ける必要がなく、したがって従来例と比較して部品
点数を削減でき、かつ構造が簡単になり、その結果組立
容易になり低コストになるという効果がある。In the circuit breaker according to the present invention, the circuit conductor is plate-shaped, one end of the circuit breaker also serves as an external connection terminal, and the other end is formed at a connection portion directly connecting the terminal of the switch element, By bending the portion and bringing the bent portion close to the contact portion, the current caused by the arc can be bypassed to the switch element, and the passage of the overcurrent to the switch element having a small overcurrent capability can be performed. To minimize the semiconductor switch element from thermal stress, and even when using a contact element such as a relay as a switch element, an overcurrent passes through the relay contact and electromagnetic repulsion of the contact occurs. Also, the problem that the contacts are welded by the generated arc can be solved, and in any case, there is no need to provide a branch path as in the conventional example, and therefore, the number of parts can be reduced as compared with the conventional example. Structure is simplified, there is an effect that it becomes cost will result easily assembled.
請求項（２）の回路しゃ断器は、請求項（１）の効果
のほか、第３の端子および第４の端子間にスイッチ素子
を接続するため、スイッチ素子の着脱が容易になる。In the circuit breaker according to claim (2), in addition to the effect of claim (1), a switch element is connected between the third terminal and the fourth terminal, so that the switch element can be easily attached and detached.
請求項（３）の回路しゃ断器は、第３の端子および第
４の端子間にスイッチ素子を接続することにより、請求
項（１）の効果が得られるほか、ユーザ等によるスイッ
チ素子の外付け等の接続が可能となり、スイッチ素子を
保護しながら事故電流をしゃ断できる。According to the circuit breaker of claim (3), the effect of claim (1) can be obtained by connecting a switch element between the third terminal and the fourth terminal. Can be connected, and the fault current can be cut off while protecting the switch element.
第１図はこの発明の第１の実施例の断面図、第２図は第
１図と断面位置が異なるもので引外し装置を示す断面
図、第３図は動作状態を説明する説明図、第４図は回路
しゃ断器の時間−電流・電圧特性図、第５図は第２の実
施例の説明図、第６図は第３の実施例の説明図、第７図
は第４の実施例の説明図、第８図は第５の実施例の断面
図、第９図は第６の実施例の断面図、第10図は第７の実
施例の断面図、第11図は従来例の説明図である。 １……第１の端子、２……第２の端子、３……スイッチ
素子、４……接点部、５……異常電流検出手段、６……
引外し装置、７……接点部の可動接点、８……接点部の
固定接点、35……電路導体FIG. 1 is a cross-sectional view of a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing a trip device having a different cross-sectional position from FIG. 1, and FIG. 4 is a time-current / voltage characteristic diagram of the circuit breaker, FIG. 5 is an explanatory diagram of the second embodiment, FIG. 6 is an explanatory diagram of the third embodiment, and FIG. 7 is a fourth embodiment. FIG. 8 is a sectional view of the fifth embodiment, FIG. 9 is a sectional view of the sixth embodiment, FIG. 10 is a sectional view of the seventh embodiment, and FIG. 11 is a conventional example. FIG. DESCRIPTION OF SYMBOLS 1 ... 1st terminal, 2 ... 2nd terminal, 3 ... Switch element, 4 ... Contact part, 5 ... Abnormal current detection means, 6 ...
Tripping device, 7: Movable contact at contact part, 8: Fixed contact at contact part, 35: Electrical conductor
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H01H 73/18 H01H 9/30──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) H01H 73/18 H01H 9/30
Claims (3)
の端子および第２の端子間に接続された負荷開閉用スイ
ッチ素子と、このスイッチ素子とそれに接続される前記
第１の端子または前記第２の端子との間に挿入された接
離可能なトリップ開極用の接点部と、異常電流検出手段
と、この異常電流検出手段の動作に応動してオン状態の
前記接点部をトリップ開極させる引外し装置とを備えた
回路しゃ断器において、前記スイッチ素子と前記スイッ
チ素子に前記接点部を介さずに接続される前記第１の端
子または第２の端子の間の電路導体が板状であってその
一端が外部接続端子を兼ね、他端が前記スイッチ素子の
端子を直接接続する接続部に形成され、前記電路導体の
中間部を折曲してその折曲部を前記接点部に接近させる
ことにより、トリップ時に前記接点部に発生したアーク
のアーク端のうち、前記スイッチ素子に電気的に近い方
の接点側のアーク端を前記電路導体に飛び移らせたこと
を特徴とする回路しゃ断器。A first terminal connected to the first terminal; a second terminal connected to the first terminal;
Switch element connected between the first terminal and the second terminal, and a detachable trip inserted between the switch element and the first terminal or the second terminal connected thereto. A circuit breaker comprising: a contact portion for opening; an abnormal current detecting means; and a trip device for tripping and opening the contact portion in an ON state in response to the operation of the abnormal current detecting means. An electric circuit conductor between the first terminal or the second terminal connected to the element and the switch element without passing through the contact portion has a plate-like shape, one end of which serves also as an external connection terminal, and the other end thereof serves as the external connection terminal. An arc of an arc generated at the contact portion at the time of trip by bending an intermediate portion of the electric circuit conductor and making the bent portion close to the contact portion, which is formed at a connection portion directly connecting the terminals of the switch element. Out of the edge Circuit breaker, characterized in that electrically nearer the arc end of the contact side of the switch element was Utsura flew to the path conductor.
の端子と電気的に接続された第３の端子と、前記第２の
端子と電気的に接続された第４の端子と、前記第１の端
子と前記第３の端子との間に挿入された接離可能なトリ
ップ開極用の接点部と、異常電流検出手段と、この異常
電流検出手段の動作に応動してオン状態の前記接点部を
トリップ開極させる引外し装置と、前記第３の端子と前
記第４の端子の間に接続された負荷開閉用のスイッチ素
子とを備え、前記第２の端子と前記第４の端子の間の電
路導体が板状であってその中間部を前記接点部に接近す
る形状および配置した回路しゃ断器。2. A first terminal, a second terminal, and the first terminal.
A third terminal electrically connected to the second terminal, a fourth terminal electrically connected to the second terminal, and a third terminal inserted between the first terminal and the third terminal. A contact portion for trip opening that can be contacted / separated, an abnormal current detecting means, a trip device for trip opening the contact portion in an ON state in response to the operation of the abnormal current detecting means, and And a switch element for load switching connected between the fourth terminal and the fourth terminal, and the conductor between the second terminal and the fourth terminal is plate-shaped, and an intermediate portion thereof is provided. A circuit breaker arranged and arranged to approach the contact portion.
の端子と電気的に接続され負荷開閉用のスイッチ素子の
一端を接続する接続部となる第３の端子と、前記第２の
端子と電気的に接続されて前記負荷開閉用のスイッチ素
子の他端を接続する接続部となる第４の端子と、前記第
１の端子と前記第３の端子との間に挿入された接離可能
なトリップ開極用の接点部と、異常電流検出手段と、こ
の異常電流検出手段の動作に応動してオン状態の前記接
点部をトリップ開極させる引外し装置とを備え、前記第
２の端子と前記第４の端子の間の電路導体が板状であっ
てその中間部を前記接点部に接近する形状および配置し
た回路しゃ断器。3. A first terminal, a second terminal, and the first terminal.
A third terminal which is electrically connected to the first terminal and serves as a connection portion for connecting one end of the load switching switch element; and a third terminal which is electrically connected to the second terminal and which is connected to the load switching switch element. A fourth terminal serving as a connecting portion for connecting the ends, a contact portion for detachable trip opening inserted between the first terminal and the third terminal, and an abnormal current detecting means; A trip device for trip-opening the contact portion in the ON state in response to the operation of the abnormal current detection means, wherein a conductor between the second terminal and the fourth terminal has a plate shape. And a circuit breaker having an intermediate portion having a shape and arrangement approaching the contact portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22081489A JP2779222B2 (en) | 1988-11-25 | 1989-08-28 | Circuit breaker |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29880388 | 1988-11-25 | ||
| JP63-298803 | 1988-11-25 | ||
| JP22081489A JP2779222B2 (en) | 1988-11-25 | 1989-08-28 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02223125A JPH02223125A (en) | 1990-09-05 |
| JP2779222B2 true JP2779222B2 (en) | 1998-07-23 |
Family
ID=26523926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22081489A Expired - Lifetime JP2779222B2 (en) | 1988-11-25 | 1989-08-28 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2779222B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6694251B2 (en) * | 2015-08-31 | 2020-05-13 | テンパール工業株式会社 | Residential distribution board |
-
1989
- 1989-08-28 JP JP22081489A patent/JP2779222B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02223125A (en) | 1990-09-05 |
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