JP2007300735A - Overcurrent limiter - Google Patents

Overcurrent limiter Download PDF

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JP2007300735A
JP2007300735A JP2006126754A JP2006126754A JP2007300735A JP 2007300735 A JP2007300735 A JP 2007300735A JP 2006126754 A JP2006126754 A JP 2006126754A JP 2006126754 A JP2006126754 A JP 2006126754A JP 2007300735 A JP2007300735 A JP 2007300735A
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terminal member
signal terminal
overcurrent
switch element
signal
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Keiji Matsumoto
圭二 松本
Ryoji Iimura
良治 飯村
Tetsuya Sawaki
鉄也 沢木
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KAWAGUCHI ELECTRIC WORKS
Kawaguchi Electric Works Co Ltd
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KAWAGUCHI ELECTRIC WORKS
Kawaguchi Electric Works Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an overcurrent limiter, performing overcurrent protection of a protector having first and second signal terminals and a ground terminal, and surely protecting an apparatus from overcurrent, as well as eliminating the need for replacement after operation. <P>SOLUTION: The overcurrent limiter attached to a protector having first and second signal terminal members and performing overcurrent protection comprises a switch element taking insulation state during overcurrent, a first terminal member having one end connected with one end of the switching element, a second terminal member having one end connected with the other end of the switch element, and a case member attached between the first and second terminal members to cover the switch element. The limiter is attached between the first signal terminal member and the second signal terminal member, such that the first terminal member touches the first signal terminal member and the second terminal member touches the second signal terminal member. The switching element takes substantial insulation state during overcurrent, to insulate the first and second signal terminal members and performs overcurrent protection. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は過電流制限器に係り、特に、第1の信号端子及び第2の信号端子並びに接地端子を有する避雷器弾器の過電流保護を行う過電流制限器に関する。   The present invention relates to an overcurrent limiter, and more particularly, to an overcurrent limiter that performs overcurrent protection for a lightning arrester having a first signal terminal, a second signal terminal, and a ground terminal.

従来より信号ケーブルと通信機器との間には、過電流やサージから通信機器を保護するために保安器が設けられている(例えば、特許文献1参照)。   Conventionally, a protector is provided between a signal cable and a communication device in order to protect the communication device from an overcurrent or a surge (see, for example, Patent Document 1).

図8は従来の保安器の一例の構成図を示す。   FIG. 8 shows a configuration diagram of an example of a conventional protector.

保安器400は、主に、避雷器弾器411及び過電流制限器412、及び、サージ吸収装置413から構成されている。   The protector 400 mainly includes a lightning arrester ammunition 411, an overcurrent limiter 412, and a surge absorber 413.

避雷器弾器411は、接地板421、第1の信号端子部材422、第2の信号端子部材423、可動部材424、接地端子部材425、絶縁部材426、ボルト427、ナット428から構成されている。   The lightning arrester ammunition 411 includes a ground plate 421, a first signal terminal member 422, a second signal terminal member 423, a movable member 424, a ground terminal member 425, an insulating member 426, a bolt 427, and a nut 428.

接地板421には、接地端子部材425が保持されている。また、接地板421には、第1の信号端子部材422及び第2の信号端子部材423が絶縁部材426を挟んでボルト427及びナット428により固定されている。さらに、可動部材424は、第2の信号端子部材423に可動状態で保持されている。   A ground terminal member 425 is held on the ground plate 421. The first signal terminal member 422 and the second signal terminal member 423 are fixed to the ground plate 421 with bolts 427 and nuts 428 with the insulating member 426 interposed therebetween. Further, the movable member 424 is held in a movable state by the second signal terminal member 423.

過電流制限器412は、ケースに固定された心棒にヒートコイルがケースから突出した状態で半田付けされた構成とされている。過電流制限器412は、図8(A)に示すように第1の信号端子部材422にケースが係合し、第2の信号端子部材443にヒートコイルが係合した状態で第1の信号端子部材422と第2の信号端子部材423との間に挿入されている。   The overcurrent limiter 412 is configured to be soldered to a mandrel fixed to the case with the heat coil protruding from the case. As shown in FIG. 8A, the overcurrent limiter 412 has a first signal terminal in a state where the case is engaged with the first signal terminal member 422 and the heat coil is engaged with the second signal terminal member 443. It is inserted between the terminal member 422 and the second signal terminal member 423.

このとき、ヒートコイルを介して第2の信号部材423から第1の信号端子部材442に電流が流れるように構成されている。   At this time, a current flows from the second signal member 423 to the first signal terminal member 442 via the heat coil.

ヒートコイルに流れる電流が過電流状態となると、ヒートコイルが発熱して、心棒とヒートコイルとを固着している半田が溶融する。ヒートコイルと心棒とを固着している半田が溶融することによって、ヒートコイルが心棒の軸方向に変位可能な状態となる。ヒートコイルが変位可能な状態となることによって、第1の信号端子部材422の弾性復元力によってケース内に押圧される。   When the current flowing through the heat coil is in an overcurrent state, the heat coil generates heat, and the solder that fixes the mandrel and the heat coil melts. When the solder which fixes the heat coil and the mandrel melts, the heat coil can be displaced in the axial direction of the mandrel. When the heat coil becomes displaceable, it is pressed into the case by the elastic restoring force of the first signal terminal member 422.

これにより心棒が第2の信号端子部材422から可動部材424方向に突出する。第2の信号端子部材422から可動部材424方向に心棒が突出することにより、心棒により可動部材424が接地端子部材425方向に押圧され、図8(B)に示すように可動部材424が接地端子部材425に接触する。可動部材424が接地端子部材425に接触することにより、第1の信号端子部材422及び第2の信号端子部材423が接地端子部材424に接続される。これによって、電流を接地に逃がし、過電流状態を解消している。   As a result, the mandrel protrudes from the second signal terminal member 422 toward the movable member 424. When the mandrel protrudes from the second signal terminal member 422 toward the movable member 424, the movable member 424 is pressed toward the ground terminal member 425 by the mandrel, and the movable member 424 is connected to the ground terminal as shown in FIG. Contact member 425. When the movable member 424 contacts the ground terminal member 425, the first signal terminal member 422 and the second signal terminal member 423 are connected to the ground terminal member 424. As a result, the current is released to the ground, and the overcurrent state is eliminated.

なお、サージ吸収装置413は、第2の信号端子部材422と接地端子部材425との間に装着されており、サージ発生時に第2の信号端子部材422と接地端子部材425とを短絡させることにより電流を接地に逃がし、サージを吸収していた。
特開2001−211544号公報
The surge absorber 413 is mounted between the second signal terminal member 422 and the ground terminal member 425, and short-circuits the second signal terminal member 422 and the ground terminal member 425 when a surge occurs. The current was released to ground and surge was absorbed.
JP 2001-2111544 A

しかるに、従来の保安器に装着される過電流制限器は、いわゆる、ヒートコイルから構成されており、可動部を有するため、動作が遅いなどの問題点があった。また、ヒートコイルは、構造が複雑であり、生産性が悪いなどの問題点があった。さらに、ヒートコイルは、一度動作すると過電流状態が解消しても元に戻ることはなく、過電流保護が行われた後は、交換する必要となり、メンテナンス性が悪かった。   However, the overcurrent limiter attached to the conventional protector has a so-called heat coil, and has a movable part, and thus has a problem of slow operation. Further, the heat coil has problems such as a complicated structure and poor productivity. Further, once the heat coil is operated, it does not return to its original state even if the overcurrent state is eliminated. After the overcurrent protection is performed, the heat coil needs to be replaced, and the maintainability is poor.

本発明は上記の点に鑑みてなされたもので、機器を過電流から高速、かつ、確実に保護でき、かつ、過電流保護動作後も交換が不要となる過電流制限器を提供することを目的とする。   The present invention has been made in view of the above points, and provides an overcurrent limiter that can reliably protect a device from overcurrent at high speed and that does not require replacement even after an overcurrent protection operation. Objective.

本発明は、第1の信号端子部材及び第2の信号端子部材を有する保安器に装着されて、過電流保護を行う過電流制限器において、過電流時に絶縁状態となるスイッチ素子と、一端がスイッチ素子の一端に接続された第1の端子部材と、一端がスイッチ素子の他端に接続された第2の端子部材と、第1の端子部材と第2の端子部材との間に、スイッチ素子を被覆するように装着されるケース部材とを有し、第1の端子部材が第1の信号端子に接触し、第2の端子部材が第2の信号端子部材に接触するように第1の信号端子部材と第2の信号端子部材との間に装着され、過電流時にスイッチ素子が略絶縁状態となることにより第1の信号端子部材と第2の信号端子部材とを絶縁して、過電流保護を行うことを特徴とする。
また、スイッチ素子は、サーミスタ素子から構成されていることを特徴とする。
さらに、第1の端子部材はスイッチ素子に接続される接続部と、第1の信号端子部材に面接触する鍔部と、第1の信号端子部材に形成された位置決め孔に係合する係合部とが一体に形成された構成とされており、第2の端子部材はスイッチ素子に接続される接続部と、第2の信号端子部材に面接触する鍔部と、第2の信号端子部材に形成された位置決め孔に係合する係合部とが一体に形成された構成とされており、第1の端子部材と第2の端子部材と同一の形状とされていることを特徴とする。
また、係合部は、第2の信号端子部材に形成された位置決め孔の周囲に係合する段部を有することを特徴とする。
The present invention provides an overcurrent limiter that is attached to a protector having a first signal terminal member and a second signal terminal member and performs overcurrent protection. A first terminal member connected to one end of the switch element, a second terminal member having one end connected to the other end of the switch element, and a switch between the first terminal member and the second terminal member A case member mounted so as to cover the element, the first terminal member is in contact with the first signal terminal, and the second terminal member is in contact with the second signal terminal member. Is mounted between the signal terminal member and the second signal terminal member, and the first signal terminal member and the second signal terminal member are insulated by the switch element being in a substantially insulated state at the time of overcurrent, It is characterized by performing overcurrent protection.
The switch element is composed of a thermistor element.
Further, the first terminal member is engaged with a connecting portion connected to the switch element, a flange portion that is in surface contact with the first signal terminal member, and a positioning hole formed in the first signal terminal member. And the second terminal member includes a connecting portion connected to the switch element, a flange portion in surface contact with the second signal terminal member, and a second signal terminal member. The engaging portion that engages with the positioning hole formed in the first member is integrally formed, and the first terminal member and the second terminal member have the same shape. .
Further, the engaging portion has a step portion that engages around a positioning hole formed in the second signal terminal member.

本発明によれば、過電流制限器を、過電流時に絶縁状態となるスイッチ素子と、一端がスイッチ素子の一端に接続された第1の端子部材と、一端がスイッチ素子の他端に接続された第2の端子部材と、第1の端子部材と第2の端子部材との間に、スイッチ素子を被覆するように装着されるケース部材とから構成し、第1の端子部材が第1の信号端子に接触し、第2の端子部材が第2の信号端子部材に接触するように第1の信号端子部材と第2の信号端子部材との間に装着し、過電流時にスイッチ素子が略絶縁状態となることにより第1の信号端子部材と第2の信号端子部材とを絶縁して、過電流保護を行うようにすることにより、可動部が不要となるので、ヒートコイル用いた従来品より高速な過電流保護ができ、信頼性を向上させることができる。   According to the present invention, the overcurrent limiter includes a switch element that is in an insulated state when overcurrent, a first terminal member having one end connected to one end of the switch element, and one end connected to the other end of the switch element. The second terminal member, and a case member mounted so as to cover the switch element between the first terminal member and the second terminal member, wherein the first terminal member is the first terminal member. The switch element is mounted between the first signal terminal member and the second signal terminal member so that the second terminal member contacts the signal terminal and the second terminal member contacts the second signal terminal member. Since the first signal terminal member and the second signal terminal member are insulated from each other by being in an insulated state and overcurrent protection is performed, no moving parts are required. Faster overcurrent protection and improved reliability Kill.

図1は本発明の過電流制限器の一実施例の分解斜視図、図2は本発明の過電流制限器の一実施例の組立時の斜視図を示す。   FIG. 1 is an exploded perspective view of an embodiment of the overcurrent limiter of the present invention, and FIG. 2 is a perspective view of the embodiment of the overcurrent limiter of the present invention during assembly.

本実施例の過電流制限器100は、スイッチ素子111、第1の端子部材112、第2の端子部材113、ケース114から構成されている。   The overcurrent limiter 100 according to the present embodiment includes a switch element 111, a first terminal member 112, a second terminal member 113, and a case 114.

スイッチ素子111は、過電流状態になると略絶縁状態となるスイッチ素子であり、例えば、サーミスタ素子から構成されている。サーミスタ素子としては、略板状に成型されたポリマ系樹脂の固まりからなるポリマ系PCTサーミスタ素子(Positive Temperature Coefficient)が考えられる。ポリマ系のPTCサーミスタは、正の温度係数を持ち、素子の温度が所定の温度を超えると、急激に抵抗値が増加し、略絶縁状態となるデバイスである。また、ポリマ系のPTCサーミスタ素子の抵抗値変化は、可逆性であり、電源をいったんオフにすることにより、素子温度が下がり、元の抵抗値に戻り、導通可能となる。このため、ヒューズのように交換する必要がない。   The switch element 111 is a switch element that enters a substantially insulated state when an overcurrent state occurs, and is configured of, for example, a thermistor element. As the thermistor element, a polymer PCT thermistor element (Positive Temperature Coefficient) made of a lump of polymer resin molded in a substantially plate shape can be considered. A polymer-based PTC thermistor is a device that has a positive temperature coefficient, and when the temperature of the element exceeds a predetermined temperature, the resistance value increases abruptly and becomes substantially insulated. The resistance value change of the polymer-based PTC thermistor element is reversible. When the power supply is turned off, the element temperature decreases, the original resistance value is restored, and conduction becomes possible. For this reason, it is not necessary to replace like a fuse.

図3は第1の端子部材112の側面図を示す。   FIG. 3 shows a side view of the first terminal member 112.

第1の端子部材112は、導電材よりなり、接続部121、溝部122、鍔部123、係合部124を切削加工により一体的成形した構成とされている。   The first terminal member 112 is made of a conductive material, and has a configuration in which the connecting portion 121, the groove portion 122, the flange portion 123, and the engaging portion 124 are integrally formed by cutting.

接続部121は、略円錐台状とされており、その上面がスイッチ素子111の一面に突き当てられて半田付けされる。接続部121の上面は、スイッチ素子111の一面の大きさより小さくなるように形成されており、接続部121の上面をスイッチ素子111の一面に突き当てたときに接続部121とスイッチ素子111との間に楔形の溝が形成される。   The connecting portion 121 has a substantially truncated cone shape, and its upper surface is abutted against one surface of the switch element 111 and soldered. The upper surface of the connection part 121 is formed to be smaller than the size of one surface of the switch element 111, and when the upper surface of the connection part 121 is abutted against one surface of the switch element 111, A wedge-shaped groove is formed between them.

接続部121とスイッチ素子111とを半田付けするときに、この楔形の溝に半田が溜まり、接続部121とスイッチ素子111とを確実に固定できる。また、半田がスイッチ素子111の側面側に回り込むのを防止できる。   When the connection portion 121 and the switch element 111 are soldered, solder accumulates in the wedge-shaped groove, and the connection portion 121 and the switch element 111 can be reliably fixed. Further, it is possible to prevent the solder from wrapping around the side surface of the switch element 111.

接続部121の底面は、溝部122を介して鍔部123に連結している。接続部121と鍔部123との間には溝部122が形成されている。溝部122には、ケース114の内周側に形成された凸部131が係合する。   The bottom surface of the connecting portion 121 is connected to the flange portion 123 via the groove portion 122. A groove portion 122 is formed between the connection portion 121 and the flange portion 123. The groove portion 122 engages with a convex portion 131 formed on the inner peripheral side of the case 114.

鍔部123は、略円盤状に形成されており、一面側が溝部122を介して接続部が連結しており、他面に保安器の第1の信号端子が面接触する。   The flange portion 123 is formed in a substantially disk shape, and one surface side is connected to the connection portion via the groove portion 122, and the first signal terminal of the protector is in surface contact with the other surface.

係合部124は、略円柱状をなし、鍔部123の略中央から外側、矢印A方向に突出して形成されている。係合部124は、第1係合部124a及び第2係合部124bから構成されている。第1係合部124aは、第1の信号端子部材141に形成された係合部142に係合する。   The engaging portion 124 has a substantially columnar shape, and is formed to protrude outward from the substantially center of the flange portion 123 in the direction of arrow A. The engaging part 124 includes a first engaging part 124a and a second engaging part 124b. The first engagement portion 124 a engages with the engagement portion 142 formed on the first signal terminal member 141.

第2係合部124bは、第1係合部124aより直径が小さく、第1の信号端子部材に形成された係合部は貫通する。また、第2係合部124bは、第2の信号端子部材151に形成された係合部152が貫通し、第1係合部124aの上端面、矢印A方向の端面に突き当たる。   The second engagement portion 124b has a smaller diameter than the first engagement portion 124a, and the engagement portion formed in the first signal terminal member passes therethrough. Further, the second engaging portion 124b penetrates the engaging portion 152 formed in the second signal terminal member 151, and abuts against the upper end surface of the first engaging portion 124a and the end surface in the arrow A direction.

さらに、第2係合部124bの上端面、矢印A方向の端面は、可動端子部材161に突き当たる。   Furthermore, the upper end surface of the second engagement portion 124 b and the end surface in the direction of arrow A abut against the movable terminal member 161.

第2の端子部材113は、第1の端子部材112と同じ構造であり、接続部121がスイッチ素子111の第1の端子部材112が半田付けされる面とは反対側の面に半田付けされる。   The second terminal member 113 has the same structure as the first terminal member 112, and the connecting portion 121 is soldered to the surface opposite to the surface to which the first terminal member 112 of the switch element 111 is soldered. The

第1の端子部材112及び第2の端子部材113は、全く同じ構造である。よって、第1の端子部材112と第2の端子部材113とを共用することできるため、製造コストを低減できる。   The first terminal member 112 and the second terminal member 113 have exactly the same structure. Therefore, since the 1st terminal member 112 and the 2nd terminal member 113 can be shared, manufacturing cost can be reduced.

〔ケース114〕
ケース114は、ケース半体114a、114bからなり、ケース半体114aとケース半体114bとを組み合わせることにより略円筒形状となるように構成されている。
[Case 114]
The case 114 includes case halves 114a and 114b, and is configured to have a substantially cylindrical shape by combining the case halves 114a and the case halves 114b.

ケース半体114a、114bは、その内周側の両端部近傍に凸部131が形成されている。凸部131は、前述の如く、第1の端子部材112の溝部122及び第2の端子部材112の溝部122に係合する。ケース114は、第1の端子部材112及び第2の端子部材113をスイッチ素子111に半田付けした後に、両端面が第1の端子部材112の鍔部123と第2の端子部材113の鍔部123により挟持され、かつ、凸部131が第1の端子部材112及び第2の端子部材113の溝部122に係合するように取り付けられる。   The case halves 114a and 114b have convex portions 131 formed in the vicinity of both end portions on the inner peripheral side. The protrusion 131 engages with the groove 122 of the first terminal member 112 and the groove 122 of the second terminal member 112 as described above. The case 114 is soldered with the first terminal member 112 and the second terminal member 113 to the switch element 111, and both end surfaces thereof are the flange portion 123 of the first terminal member 112 and the flange portion of the second terminal member 113. 123, and the protrusion 131 is attached so as to engage with the groove 122 of the first terminal member 112 and the second terminal member 113.

ケース114を取り付けることによって図2に示すようにスイッチ素子111及び第1の端子部材112及び第2の端子部材113の接続部121がケース114の内部に収納される。   By attaching the case 114, the switch element 111, the first terminal member 112, and the connection portion 121 of the second terminal member 113 are accommodated in the case 114 as shown in FIG. 2.

本実施例の過電流制限器100は、ヒートコイルとは逆に、過電流時に第1の信号端子部材141と第2の信号端子部材151との間を絶縁状態とすることにより第1の信号端子部材141側を第2の信号端子部材151から流れ込む過電流から保護している。   In contrast to the heat coil, the overcurrent limiter 100 according to the present embodiment is configured so that the first signal terminal member 141 and the second signal terminal member 151 are insulated from each other at the time of overcurrent. The terminal member 141 side is protected from overcurrent flowing from the second signal terminal member 151.

〔適用例〕
次に過電流制限器100を適用した保安器について説明する。
[Application example]
Next, a protector to which the overcurrent limiter 100 is applied will be described.

図4は過電流制限器100の適用例の構成図を示す。   FIG. 4 shows a configuration diagram of an application example of the overcurrent limiter 100.

本適用例は、過電流制限器100を保安器200に装着した例を示している。   This application example shows an example in which the overcurrent limiter 100 is attached to the protector 200.

保安器200は、避雷器弾器211に過電流制限器100及びサージ吸収装置300を装着した構成とされている。   The protector 200 is configured such that the overcurrent limiter 100 and the surge absorber 300 are attached to the lightning arrester ammunition 211.

避雷器弾器211は、接地板221に接地端子部材222を装着するとともに、前述の第1の信号端子部材141及び第2の信号端子部材151をボルト2234及びナット225により絶縁部材223に締め付けることにより接地板221に固定した構成とされている。また、第2の信号端子部材151には、可動部材161が矢印C1、C2方向に弾性変形可能に固定されている。また、第1の信号端子部材141及び第2の信号端子部材151は、矢印B1、B2方向に弾性変形可能な構成とされている。過電流制限器100は第1の信号端子部材141と第2の信号端子部材151との間に装着され、第1の信号端子部材141と第2の信号端子部材151との間に接続され、サージ吸収装置300は避雷器弾器211の端部に装着されて、第2の信号端子部材151と接地板211との間に接続される。   The lightning arrester ammunition 211 has a ground terminal member 222 attached to the ground plate 221, and the first signal terminal member 141 and the second signal terminal member 151 are fastened to the insulating member 223 by bolts 2234 and nuts 225. The structure is fixed to the ground plate 221. A movable member 161 is fixed to the second signal terminal member 151 so as to be elastically deformable in the directions of arrows C1 and C2. The first signal terminal member 141 and the second signal terminal member 151 are configured to be elastically deformable in the directions of arrows B1 and B2. The overcurrent limiter 100 is mounted between the first signal terminal member 141 and the second signal terminal member 151, connected between the first signal terminal member 141 and the second signal terminal member 151, The surge absorbing device 300 is attached to the end of the lightning arrester bullet 211 and is connected between the second signal terminal member 151 and the ground plate 211.

次にサージ吸収装置300について説明する。   Next, the surge absorber 300 will be described.

図5はサージ吸収装置300の分解斜視図、図6はサージ吸収装置300の組立時の斜視図を示す。   FIG. 5 is an exploded perspective view of the surge absorber 300, and FIG. 6 is a perspective view of the surge absorber 300 during assembly.

サージ吸収装置300は、回路基板311、端子部材312、313、314、ケース315から構成されている。   The surge absorber 300 includes a circuit board 311, terminal members 312, 313 and 314, and a case 315.

回路基板311には、セラミックガスアレスタ321及びサイリスタ322並びに抵抗323が搭載され、周囲に端子部材312、313、314が半田付けされている。   A ceramic gas arrester 321, a thyristor 322, and a resistor 323 are mounted on the circuit board 311, and terminal members 312, 313, and 314 are soldered around the circuit board 311.

ケース315は、ケース半体331、332により構成されている。回路基板311及び端子部材312、313、314は、ケース半体331、332により挟持されて所定の位置に位置決めされて収納される。   The case 315 includes case halves 331 and 332. The circuit board 311 and the terminal members 312, 313, and 314 are sandwiched between the case halves 331 and 332, positioned at predetermined positions, and stored.

ケース315は、平面形状が矩形状をなし、U字状の溝部341が形成されている。端子部材312、313は、ケース315の側面に表出して位置決めされる。また、端子部材314は、溝部314の内周側に表出して位置決めされている。   The case 315 has a rectangular planar shape and is formed with a U-shaped groove 341. The terminal members 312 and 313 are exposed and positioned on the side surface of the case 315. Further, the terminal member 314 is exposed and positioned on the inner peripheral side of the groove portion 314.

サージ吸収装置300は、避雷器弾器211の端部に溝部341が係合し、避雷器弾器211の両面をまたいで装着される。サージ吸収装置300が避雷器弾器211に装着されることにより、端子部材312、313が第1の信号端子部材141に接触し、端子部材314が接地端子部材222に接触する。   The surge absorber 300 is mounted across the both sides of the lightning arrester bullet 211 with the groove 341 engaged with the end of the lightning arrester bullet 211. When the surge absorber 300 is mounted on the lightning arrester bullet 211, the terminal members 312 and 313 are in contact with the first signal terminal member 141, and the terminal member 314 is in contact with the ground terminal member 222.

また、サージ吸収装置300が避雷器弾器211に装着されると、第2の信号端子部材151が矢印C1、C2方向に弾性変形する。第2の信号端子部材151が矢印C1、C2方向に弾性変形することにより、第2の信号端子部材151に固定された可動部材161が接地端子部材222から離間する。   When the surge absorber 300 is attached to the lightning arrester bullet 211, the second signal terminal member 151 is elastically deformed in the directions of arrows C1 and C2. When the second signal terminal member 151 is elastically deformed in the directions of the arrows C <b> 1 and C <b> 2, the movable member 161 fixed to the second signal terminal member 151 is separated from the ground terminal member 222.

過電流制限器100は、第1の信号端子部材141を矢印B1方向に弾性変形させつつ、第1の信号端子部材141と第2の信号端子部材151との間に装着され、第1の信号端子部材141の弾性復帰力によって、第2の信号端子部材151に押しつけられ、第1の信号端子部材141と第2の信号端子部材151との間に保持される。このとき、第1の信号端子部材141と第2の信号端子部材151との間隔は過電流制限器100によって常時、所定の間隔に保持される。また、過電流制限器100の第2係合部124bは、過電流制限器100を第1の信号端子部材141と第2の信号端子部材151との間に装着したときに可動端子部材161が接地端子部材222に接触しない高さに設定されている。これによって、可動端子部材161と接地端子部材222とは常時、非接触状態に維持される。   The overcurrent limiter 100 is mounted between the first signal terminal member 141 and the second signal terminal member 151 while elastically deforming the first signal terminal member 141 in the direction of the arrow B1, and a first signal The elastic member is pressed against the second signal terminal member 151 by the elastic restoring force of the terminal member 141 and is held between the first signal terminal member 141 and the second signal terminal member 151. At this time, the interval between the first signal terminal member 141 and the second signal terminal member 151 is always maintained at a predetermined interval by the overcurrent limiter 100. In addition, the second engaging portion 124b of the overcurrent limiter 100 has the movable terminal member 161 when the overcurrent limiter 100 is mounted between the first signal terminal member 141 and the second signal terminal member 151. The height is set so as not to contact the ground terminal member 222. Thereby, the movable terminal member 161 and the ground terminal member 222 are always maintained in a non-contact state.

図7は保安器200の等価回路図を示す。   FIG. 7 shows an equivalent circuit diagram of the protector 200.

保安器200は、第2の信号端子部材151と接地端子部材222との間に上記サージ吸収装置300が配置され、第1の信号端子部材141と第2の信号端子部材151との間に上記過電流制限器100が接続されることにより、図7に示すような回路を構成する。   In the protector 200, the surge absorbing device 300 is disposed between the second signal terminal member 151 and the ground terminal member 222, and the above-described protection device 200 is interposed between the first signal terminal member 141 and the second signal terminal member 151. By connecting the overcurrent limiter 100, a circuit as shown in FIG. 7 is configured.

過電流時には、過電流制限器100が略絶縁状態となることによって第1の信号端子部材141と第2の信号端子部材151とが切断され、例えば、第2の信号端子部材151側から第1の信号端子部材141側に過電流が流れることを阻止できる。これによって、第1の信号端子部材141側に接続された通信機器を過電流から保護できる。   At the time of overcurrent, the first signal terminal member 141 and the second signal terminal member 151 are disconnected due to the overcurrent limiter 100 being in a substantially insulated state. For example, the first signal terminal member 151 side is connected to the first signal terminal member 151 side. The overcurrent can be prevented from flowing to the signal terminal member 141 side. Thereby, the communication apparatus connected to the first signal terminal member 141 side can be protected from overcurrent.

また、サージ電圧発生時には、まず、サージ吸収装置300のサイリスタ322がオンして、電流を接地端子部材322から接地に流し、サージ電圧を吸収する。さらに、サージ電圧が上昇すると、サージ吸収装置300のセラミックガスアレスタ321がオンして、電流を接地端子部材322から接地に流し、サージ電圧を吸収する。   Further, when a surge voltage is generated, first, the thyristor 322 of the surge absorber 300 is turned on, and a current is passed from the ground terminal member 322 to the ground to absorb the surge voltage. Further, when the surge voltage rises, the ceramic gas arrester 321 of the surge absorber 300 is turned on, and a current is passed from the ground terminal member 322 to the ground to absorb the surge voltage.

このとき、サイリスタ322は、半導体素子であり、サージ電圧に対して高速に応答できる。また、セラミックガスアレスタ321は高い耐圧を持っており、サージ電圧を確実に吸収させることが可能となる。   At this time, the thyristor 322 is a semiconductor element and can respond to the surge voltage at high speed. Further, the ceramic gas arrester 321 has a high withstand voltage, and can reliably absorb a surge voltage.

したがって、本適用例のサージ吸収装置300を用いることにより、サージ電圧に対して高速に応答でき、かつ、高サージ電圧に対応できる。   Therefore, by using the surge absorbing device 300 of this application example, it is possible to respond to the surge voltage at a high speed and to cope with the high surge voltage.

なお、抵抗323は、サイリスタ322に直列に接続されており、サイリスタ322に流れる電流を制限している。   The resistor 323 is connected in series to the thyristor 322, and limits the current flowing through the thyristor 322.

本実施例によれば、スイッチ素子111としてサーミスタ素子を用いることにより過電流に対して高速に対応できる。また、可動部材161を可動させることなく、過電流保護を行うことができるため、過電流保護の信頼性を向上させることが可能となる。また、過電流保護がかかったときでも、過電流状態が解除されると、自動的に導通状態に復帰するので、メンテナンスが容易である。さらに、既存の避雷器弾器211に装着して使用することができる。   According to this embodiment, by using a thermistor element as the switch element 111, it is possible to cope with overcurrent at high speed. Further, since the overcurrent protection can be performed without moving the movable member 161, the reliability of the overcurrent protection can be improved. Even when overcurrent protection is applied, when the overcurrent state is released, the state automatically returns to the conductive state, so that maintenance is easy. Furthermore, it can be used by being mounted on the existing lightning arrester ammunition 211.

本発明の過電流制限器の一実施例の分解斜視図である。It is a disassembled perspective view of one Example of the overcurrent limiter of this invention. 本発明の過電流制限器の一実施例の組立時の斜視図である。It is a perspective view at the time of the assembly of one Example of the overcurrent limiter of this invention. 第1の端子部材112の側面図である。3 is a side view of a first terminal member 112. FIG. 過電流制限器100の適用例の構成図である。2 is a configuration diagram of an application example of an overcurrent limiter 100. FIG. サージ吸収装置300の分解斜視図である。2 is an exploded perspective view of a surge absorber 300. FIG. サージ吸収装置300の組立時の斜視図である。It is a perspective view at the time of the assembly of the surge absorber 300. FIG. 保安器200の等価回路図である。3 is an equivalent circuit diagram of the protector 200. FIG. 従来の保安器の一例の構成図である。It is a block diagram of an example of the conventional protector.

符号の説明Explanation of symbols

100 過電流制限器
111 スイッチ素子、112 第1の端子部材、113 第2の端子部材
114 ケース、114a、114b ケース半体
121 接続部、122 溝部、123 鍔部、124 係合部
124a 第1係合部、124b 第2係合部
131 凸部
141 第1の信号端子部材、151 第2の信号端子部材、161 可動部材
200 保安器
211 避雷器弾器
221 接地板、222 接地端子部材、223 絶縁部材、224 ボルト
225 ナット
300 サージ吸収装置
311 回路基板、312〜314 端子部材、315 ケース
321 セラミックガスアレスタ、322 サイリスタ、323 抵抗
331、332 ケース半体
341 溝部
DESCRIPTION OF SYMBOLS 100 Overcurrent limiter 111 Switch element, 112 1st terminal member, 113 2nd terminal member 114 Case, 114a, 114b Case half body 121 Connection part, 122 Groove part, 123 collar part, 124 Engagement part 124a 1st connection Joint part, 124b Second engagement part 131 Convex part 141 First signal terminal member, 151 Second signal terminal member, 161 Movable member 200 Arrestor 211 Arrester arrester 221 Ground plate, 222 Ground terminal member, 223 Insulating member 224 Bolt 225 Nut 300 Surge absorber 311 Circuit board, 312 to 314 Terminal member, 315 Case 321 Ceramic gas arrester, 322 Thyristor, 323 Resistance 331, 332 Case half 341 Groove

Claims (4)

第1の信号端子部材及び第2の信号端子部材を有する避雷器弾器に装着されて、過電流保護を行う過電流制限器において、
過電流時に絶縁状態となるスイッチ素子と、
一端が前記スイッチ素子の一端に接続された第1の端子部材と、
一端が前記スイッチ素子の他端に接続された第2の端子部材と、
前記第1の端子部材と前記第2の端子部材との間に、前記スイッチ素子を被覆するように装着されるケース部材とを有し、
前記第1の端子部材が前記第1の信号端子に接触し、前記第2の端子部材が前記第2の信号端子部材に接触するように前記第1の信号端子部材と前記第2の信号端子部材との間に装着され、
前記過電流時に前記スイッチ素子が略絶縁状態となることにより前記第1の信号端子部材と前記第2の信号端子部材とを絶縁して、過電流保護を行うことを特徴とする過電流制限器。
In an overcurrent limiter that is mounted on a lightning arrester ammunition having a first signal terminal member and a second signal terminal member and performs overcurrent protection,
A switch element that becomes insulative when overcurrent; and
A first terminal member having one end connected to one end of the switch element;
A second terminal member having one end connected to the other end of the switch element;
A case member mounted between the first terminal member and the second terminal member so as to cover the switch element;
The first signal terminal member and the second signal terminal such that the first terminal member contacts the first signal terminal and the second terminal member contacts the second signal terminal member. It is mounted between the members,
An overcurrent limiter that performs overcurrent protection by insulating the first signal terminal member and the second signal terminal member when the switch element is in a substantially insulated state during the overcurrent. .
前記スイッチ素子は、サーミスタ素子から構成されていることを特徴とする請求項1記載の過電流制限器。 The overcurrent limiter according to claim 1, wherein the switch element is a thermistor element. 前記第1の端子部材は、前記スイッチ素子に接続される接続部と、
前記第1の信号端子部材に面接触する鍔部と、
前記第1の信号端子部材に形成された位置決め孔に係合する係合部とが一体に形成された構成とされており、
前記第2の端子部材は、前記スイッチ素子に接続される接続部と、
前記第2の信号端子部材に面接触する鍔部と、
前記第2の信号端子部材に形成された位置決め孔に係合する係合部とが一体に形成された構成とされており、
前記第1の端子部材と前記第2の端子部材と同一の形状とされていることを特徴とする請求項1記載の過電流制限器。
The first terminal member includes a connection portion connected to the switch element;
A flange that is in surface contact with the first signal terminal member;
An engaging portion that engages with a positioning hole formed in the first signal terminal member is integrally formed,
The second terminal member includes a connection portion connected to the switch element;
A flange that is in surface contact with the second signal terminal member;
An engaging portion that engages with a positioning hole formed in the second signal terminal member is integrally formed,
The overcurrent limiter according to claim 1, wherein the first terminal member and the second terminal member have the same shape.
前記係合部は、前記第2の信号端子部材に形成された位置決め孔の周囲に係合する段部を有することを特徴とする請求項3記載の過電流制限器。 The overcurrent limiter according to claim 3, wherein the engaging portion has a stepped portion that engages around a positioning hole formed in the second signal terminal member.
JP2006126754A 2006-04-28 2006-04-28 Overcurrent limiter Pending JP2007300735A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009136123A (en) * 2007-12-03 2009-06-18 Sankosha Corp Safety device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009136123A (en) * 2007-12-03 2009-06-18 Sankosha Corp Safety device

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