JP2677866B2 - Load protector - Google Patents
Load protectorInfo
- Publication number
- JP2677866B2 JP2677866B2 JP1133801A JP13380189A JP2677866B2 JP 2677866 B2 JP2677866 B2 JP 2677866B2 JP 1133801 A JP1133801 A JP 1133801A JP 13380189 A JP13380189 A JP 13380189A JP 2677866 B2 JP2677866 B2 JP 2677866B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- short
- load
- current
- electromagnet
- 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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Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、電力用半導体を使用した整流装置，無接
点コンタクタ等の電気装置を負荷とし、このような負荷
を過電流等の所定値以上の電流から保護する負荷保護装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention uses an electric device such as a rectifying device or a contactless contactor using a power semiconductor as a load, and the load is equal to or more than a predetermined value such as overcurrent. The present invention relates to a load protection device that protects from the electric current.
負荷の過電流からの保護は、一般にヒューズや回路し
ゃ断器等の回路保護装置を電路に設置することによって
行われている。また過電流耐量の小さな負荷を効果的に
保護するため、事故電流を小さく抑制してしゃ断する限
流ブレーカが用いられている。The protection from the overcurrent of the load is generally performed by installing a circuit protection device such as a fuse or a circuit breaker in the electric circuit. In addition, in order to effectively protect a load with a small overcurrent withstand capability, a current limiting breaker that suppresses the fault current and cuts off is used.
たとえば電力用半導体が使用されている電気回路等で
は、電力用半導体の過電流耐量が小さいため、限流ブレ
ーカあるいはヒューズによっても短絡事故等による過電
流からの保護は完全ではなかった。For example, in an electric circuit or the like in which a power semiconductor is used, since the power semiconductor has a small overcurrent withstand capability, protection from an overcurrent due to a short circuit accident or the like is not perfect even with a current limiting breaker or a fuse.
また、半導体素子の十分な保護を行うため、回路しゃ
断器と一体となって、短絡事故発生時に半導体素子をバ
イパスすると同時に事故電流のしゃ断を行うようにした
もの（特開昭59−66030号）が考えられているが、構成
が複雑であり、かつこれを多数組み合わせて回路を構成
するにはスペース的にもコスト的にも不利であった。Also, in order to sufficiently protect the semiconductor element, it is integrated with a circuit breaker to bypass the semiconductor element when a short-circuit accident occurs and at the same time interrupt the fault current (Japanese Patent Laid-Open No. 59-66030). However, the configuration is complicated, and it is disadvantageous in terms of space and cost to configure a circuit by combining a large number of them.
さらに、高速限流ヒューズによって回路を事故電流か
ら保護することも可能であるが、ヒューズは溶断するた
びに新しいものと交換する必要があり、事故の復旧に手
間取るとともに不経済でもある。Further, while it is possible to protect the circuit from fault currents with fast current limiting fuses, the fuse must be replaced with a new one each time it is blown, which is both time consuming and uneconomical to recover from the fault.
したがって、この発明の目的は、過電流耐量の小さい
負荷を簡単な構成により効果的に保護することができ、
しかも復旧が簡単な負荷保護装置を提供することであ
る。Therefore, an object of the present invention is to effectively protect a load having a small overcurrent withstanding capability with a simple configuration.
Moreover, it is to provide a load protection device that can be easily restored.
この発明の負荷保護装置は、複数の電路のそれぞれに
設けられて各電路に流れる電流が所定値以上になると動
作する可動体を有する複数の電磁石装置と、これらの電
磁石装置の各前可動体の動作に連動して前記電路間を短
絡する共通の短絡手段とを備えたものである。The load protection device of the present invention includes a plurality of electromagnet devices provided in each of a plurality of electric paths and having a movable body that operates when a current flowing in each electric path exceeds a predetermined value, and a front movable body of each of these electromagnet devices. A common short-circuit means for short-circuiting the electric circuits in association with the operation.
この発明の構成によれば、任意の電路の１つに所定値
以上の電流が流れるとその電路の電磁石装置が動作し、
電磁石装置の動作により短絡手段が連動して複数の電路
を短絡し、負荷を保護する。したがって、過電流耐量の
小さい負荷を簡単な構成により効果的に保護することが
でき、しかも電磁石装置のため復旧が簡単である。また
複数の電磁石装置に対して共通の短絡手段を設けたた
め、相間のそれぞれに常開接点を接続する場合よりも構
成および配線が簡単にできる。According to the configuration of the present invention, when a current of a predetermined value or more flows in one of the electric paths, the electromagnet device of the electric path operates,
The operation of the electromagnet device causes the short-circuiting device to work together to short-circuit a plurality of electric paths to protect the load. Therefore, it is possible to effectively protect a load having a small overcurrent withstand capability with a simple configuration, and moreover, the restoration is easy because of the electromagnet device. Further, since the common short-circuit means is provided for the plurality of electromagnet devices, the configuration and wiring can be simplified as compared with the case where the normally open contact is connected to each of the phases.
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、この負荷保護装置は、複数の
電磁石装置１〜３と、短絡手段４からなっている。A first embodiment of the present invention will be described with reference to FIGS. That is, this load protection device includes a plurality of electromagnet devices 1 to 3 and the short-circuit means 4.
複数の電磁石装置１〜３は、複数の電路５〜７のそれ
ぞれに設けられて各電路５〜７に流れる電流が所定値以
上になると動作する。電磁石装置１〜３は、コイル８と
可動体であるプランジャピン９と感動電流を設定するば
ね（図示せず）からなる。各コイル８は、架台10に設け
た電流端子11と負荷端子12との間に接続され、電流端子
11が回路保護装置13に接続され、負荷端子12が負荷14に
接続される。電磁石装置１〜３の感動電流は、負荷14の
定格電流よりも大きく、かつ回路保護装置13の動作電流
よりも小さく設定している。こうして、電磁石装置１〜
３は負荷14と回路保護装置13との間に接続されて負荷14
に異常電流が流れたときに回路保護装置13よりも先に動
作することとなる。回路保護装置13は回路しゃ断器を実
施例としている。The plurality of electromagnet devices 1 to 3 are provided in each of the plurality of electric paths 5 to 7 and operate when the current flowing in each of the electric paths 5 to 7 becomes a predetermined value or more. The electromagnet devices 1 to 3 each include a coil 8, a plunger pin 9 that is a movable body, and a spring (not shown) that sets a moving current. Each coil 8 is connected between the current terminal 11 and the load terminal 12 provided on the gantry 10,
11 is connected to the circuit protection device 13, and the load terminal 12 is connected to the load 14. The sensing currents of the electromagnet devices 1 to 3 are set to be larger than the rated current of the load 14 and smaller than the operating current of the circuit protection device 13. Thus, the electromagnet devices 1 to
3 is connected between the load 14 and the circuit protection device 13, and the load 14
When an abnormal current flows through the circuit, it operates before the circuit protection device 13. The circuit protection device 13 uses a circuit breaker as an example.
短絡手段４は、電磁石装置１〜３の動作に連動して電
路５〜７間を短絡する。この短絡手段４はプランジャピ
ン９に接続された短絡可動板15と、負荷端子12に接続さ
れて短絡可動板15が接離する接触部16からなる。The short-circuit means 4 interlocks with the operation of the electromagnet devices 1 to 3 to short-circuit the electric paths 5 to 7. The short-circuit means 4 is composed of a short-circuit movable plate 15 connected to the plunger pin 9 and a contact portion 16 connected to the load terminal 12 for contacting and separating the short-circuit movable plate 15.
第１図は通常の状態であり、短絡手段４の短絡可動板
15は接触部16から開離しており、回路保護装置13を通し
て入力された電力は電磁石装置１〜３を通して負荷14に
給電される。FIG. 1 shows a normal state, and the short-circuit movable plate of the short-circuit means 4
Reference numeral 15 is separated from the contact portion 16, and the electric power input through the circuit protection device 13 is supplied to the load 14 through the electromagnet devices 1 to 3.
第２図は事故が発生したときであり、負荷14に電磁石
装置１〜３の感動電流以上の短絡電流等の過電流が流れ
ると電磁石装置１〜３が作動し、プランジャピン９で短
絡可動板15を連動し、短絡可動板15が接触部16に接触し
て電路５〜７を相互に短絡し、異常電流は短絡可動板15
を流れて負荷14には流れなくなる。一方、回路保護装置
13には短絡可動板15を通して異常電流が流れるので電路
５〜７をそれぞれしゃ断し、これにより異常電流が停止
すると電磁石装置１〜３は自己のばねにより復帰し、同
時に短絡可動板15を復帰し、第１図の状態に戻る。FIG. 2 shows the time when an accident occurs, and when an overcurrent such as a short-circuit current of the electromagnet devices 1 to 3 or more flows into the load 14, the electromagnet devices 1 to 3 are activated and the plunger pin 9 causes the short-circuit movable plate. 15, the short-circuit movable plate 15 comes into contact with the contact portion 16 and short-circuits the electric paths 5 to 7 with each other.
To flow to the load 14. On the other hand, circuit protection device
Since an abnormal current flows through the short-circuit movable plate 15, the electric circuits 5 to 7 are cut off respectively, and when the abnormal current is stopped by this, the electromagnet devices 1 to 3 are restored by their own springs, and at the same time, the short-circuit movable plate 15 is restored. , Returns to the state of FIG.
第３図は事故発生時の時間対電流の関係図を示すもの
である。Q1はこの負荷保護装置がない場合に負荷14を流
れる事故電流、Q2は短絡可動板15が接触部16に接触する
ことにより電路５〜７を流れる電流、Q3はこの負荷保護
装置がある場合に負荷14を流れる電流であり、負荷14に
流れる異常電流は電磁石装置１〜３が動作するまでの約
１〜2ms程度である。FIG. 3 shows a time-current relationship diagram when an accident occurs. Q 1 is the fault current that flows through the load 14 without this load protection device, Q 2 is the current that flows through the electric paths 5 to 7 when the short-circuit movable plate 15 contacts the contact portion 16, and Q 3 is when this load protection device is present. An abnormal current flowing through the load 14 in a certain case is about 1 to 2 ms until the electromagnet devices 1 to 3 operate.
この実施例によれば、任意の電路５〜７の１つに所定
値以上の電流が流れるとその電路5,6または７の電磁石
装置1,2または３が動作し、電磁石装置1,2または３の動
作により短絡手段４が連動して複数の電路５〜７を短絡
し、負荷14を保護する。一方電路５〜７の短絡により回
路保護装置13がしゃ断動作して電路５〜７をしゃ断す
る。このため、この負荷保護装置により、回路保護装置
13がしゃ断動作するよりも速く負荷に流れる異常電流を
抑止することができる。したがって、過電流耐量の小さ
い負荷を簡単な構成により効果的に保護することがで
き、しかも電磁石装置１〜３のため復旧が簡単である。According to this embodiment, when an electric current of a predetermined value or more flows in one of the arbitrary electric paths 5 to 7, the electromagnet device 1, 2 or 3 of the electric path 5, 6 or 7 is operated, and the electromagnet device 1, 2 or By the operation of 3, the short-circuiting means 4 is interlocked to short-circuit the plurality of electric paths 5 to 7 and protect the load 14. On the other hand, due to the short circuit of the electric lines 5 to 7, the circuit protection device 13 operates to cut off the electric lines 5 to 7. Therefore, this load protection device allows
It is possible to suppress the abnormal current flowing through the load faster than the switching operation of 13. Therefore, it is possible to effectively protect a load having a small overcurrent withstanding capability with a simple configuration, and furthermore, the electromagnet devices 1 to 3 can easily restore the load.
また、電磁石装置１〜３の動作設定が保護すべき負荷
14の本来の過電流耐量以下であれば、回路保護装置13の
しゃ断能力の全範囲で保護できることとなる。すなわ
ち、電磁石装置１〜３の動作を負荷14に応じて設定する
ことにより、負荷14を流れる電流を保護に十分な範囲に
することがてき、負荷保護装置を含めた見掛け上の負荷
14の過電流耐量を飛躍的に大きくすることができ、従来
保護できなかった領域まで回路保護装置13で保護できる
こととなる。また、回路保護装置13のしゃ断電流は短絡
手段が動作すると逆に増大してしまうが、回路保護装置
は設置点での全短絡に耐えるように設置されるものであ
るため、しゃ断は実行される。Also, the load that the operation settings of the electromagnet devices 1 to 3 should protect.
If it is equal to or less than the original overcurrent withstand capacity of 14, the circuit protection device 13 can be protected in the entire range of the breaking ability. That is, by setting the operations of the electromagnet devices 1 to 3 according to the load 14, the current flowing through the load 14 can be set within a range sufficient for protection, and the apparent load including the load protection device can be set.
The overcurrent withstanding capability of 14 can be dramatically increased, and the circuit protection device 13 can protect the region that could not be protected conventionally. Further, the cut-off current of the circuit protection device 13 increases conversely when the short-circuit means operates, but since the circuit protection device is installed so as to withstand all short-circuits at the installation point, the interruption is performed. .
また、電路５〜７の１つに所定値以上の電流が流れる
と短絡手段４が動作するため、１線地絡のように、過電
流が１極のみに流れる場合にも確実に負荷14を保護する
ことが可能であり、負荷14に半導体素子等の過電流耐量
の小さいものが含まれる場合にはその保護効果は大であ
る。たとえば、複数の電路の各極に回路電流に応動する
スイッチがあり、過電流を検知して２極以上が動作した
ときに回路が短絡されて負荷に過電流が流れなくなるよ
うに構成したものは、１極のみに地絡等により過電流が
流れても、保護が不可能である。Further, since the short-circuit means 4 operates when a current of a predetermined value or more flows in one of the electric paths 5 to 7, the load 14 is surely applied even when the overcurrent flows to only one pole like a one-wire ground fault. It is possible to protect, and when the load 14 includes a semiconductor element or the like having a small overcurrent withstand capability, the protection effect is great. For example, there is a switch that responds to the circuit current at each pole of a plurality of electric circuits, and when overcurrent is detected and two or more poles operate, the circuit is short-circuited and the overcurrent does not flow to the load. Even if an overcurrent flows through only one pole due to a ground fault or the like, protection is impossible.
また電磁石装置１〜３のばねの荷重を代えるだけで、
感動電流値を変えることができるため、部品の管理コス
トの低減にもつながり、簡単な構造と合わせて安価な保
護装置を提供することが可能となる。Also, simply by changing the load of the springs of the electromagnet devices 1 to 3,
Since the moving current value can be changed, the management cost of parts can be reduced, and it becomes possible to provide an inexpensive protection device with a simple structure.
また複数の電磁石装置１〜３に対して共通の短絡手段
４を設けたため、相間のそれぞれに常開接点を接続する
場合よりも構成および配線が簡単にできる。Further, since the common short-circuit means 4 is provided for the plurality of electromagnet devices 1 to 3, the configuration and wiring can be simplified as compared with the case where the normally open contact is connected to each of the phases.
なお、前記実施例では負荷保護装置の検出対称となる
異常電流は、回路保護装置13より小さかったが、同じで
もよい。この場合、回路保護装置13の短絡検出用の電磁
石の動作と同時に電磁石装置１〜３が動作し、回路保護
装置の電磁石の動作時点からしゃ断機構を経て可動接触
子が開極動作する時点に至る時間を短縮することができ
る。In the above embodiment, the abnormal current that is the detection symmetry of the load protection device is smaller than that of the circuit protection device 13, but it may be the same. In this case, the electromagnet devices 1 to 3 are operated at the same time as the operation of the electromagnet for detecting a short circuit of the circuit protection device 13, and from the time when the electromagnet of the circuit protection device is operated to the time when the movable contact is opened by way of the cutoff mechanism. The time can be shortened.
この発明の第２の実施例を第４図ないし第６図に示
す。すなわち、この負荷保護装置は２極構造である。17
は銅線等よりなり、途中に空心のコイル８を形成した内
部電路であり、その両端はそれぞれ電源端子11および負
荷端子12に溶接等により接続されており、電源端子11お
よび負荷端子12がそれぞれ止めねじ16,17で器台10に固
定されると、電路17も固定される。負荷端子12は接触部
16を一体に形成している。20は中央に貫通孔20aを有す
る絶縁物製の円筒であり、前記コイル８の空心部8aに挿
入される。プランジャピン９は磁性体の棒状体であり、
一端に第１のつば9aおよび中央の第１のつば9a寄りに第
２のつば9bを有し、前記絶縁物製の円筒20の貫通孔20a
に挿入されて、コイル８とともに電磁石装置1,2を形成
する。短絡可動板15は鉄板等の剛性を有する導体より、
一対の突起23を端部の両側に突設し、器台10に形成され
た受け溝10aに挿入され、かつカバー24の短絡可動板押
さえ26により一対の突起23を結ぶ直線を軸として回動自
在となるように保持される。また短絡可動板15は一対の
プランジャピン受け溝25を有し、プランジャピン９の第
１のつば9aと第２のつば9bの間の部分を挿通させること
により、電磁石装置1,2が感動してプランジャピン９が
吸引される時に第１のつば9aによってプランジャピン９
の吸引方向へ突起23のまわりを回動する。さらに短絡可
動板15はその中央付近に器台10のばね掛け突起27に一端
が位置決めされたばね28の他端が当たり、プランジャピ
ン９の動作によって回動させられる方向と反対方向に復
帰力を受けており、カバー24のストッパ29に押付けられ
て、その定常時の位置が決められている。21は弾性を有
する導体板であり、一方端を短絡可動板15にかしめ等の
手段で固着されており、他方端には接点22がかしめ等の
手段で固着されている。30はカバー用のねじ孔、31はカ
バー取付ねじである。A second embodiment of the present invention is shown in FIGS. That is, this load protection device has a two-pole structure. 17
Is an internal electric circuit made of copper wire or the like and having an air-core coil 8 formed in the middle thereof, and both ends thereof are connected to the power supply terminal 11 and the load terminal 12 by welding or the like, and the power supply terminal 11 and the load terminal 12 are respectively connected. When the fixing screws 16 and 17 fix the instrument base 10, the electric circuit 17 is also fixed. Load terminal 12 is a contact part
16 are integrally formed. Reference numeral 20 is a cylinder made of an insulating material having a through hole 20a in the center, and is inserted into the air-core portion 8a of the coil 8. The plunger pin 9 is a magnetic rod-shaped body,
The first flange 9a at one end and the second flange 9b near the first flange 9a in the center have a through hole 20a of the insulating cylinder 20.
To form electromagnet devices 1 and 2 together with the coil 8. The short-circuit movable plate 15 is made of a rigid conductor such as an iron plate,
A pair of protrusions 23 are projected on both sides of the end, are inserted into the receiving groove 10a formed in the device base 10, and are rotated about the straight line connecting the pair of protrusions 23 by the short-circuit movable plate retainer 26 of the cover 24. It is held freely. Further, the short-circuit movable plate 15 has a pair of plunger pin receiving grooves 25, and by inserting a portion of the plunger pin 9 between the first collar 9a and the second collar 9b, the electromagnet devices 1 and 2 are moved. When the plunger pin 9 is sucked by the first brim 9a, the plunger pin 9
Is rotated around the protrusion 23 in the suction direction. Further, the short-circuit movable plate 15 receives the restoring force in the direction opposite to the direction in which it is rotated by the operation of the plunger pin 9 near the center thereof, and the other end of the spring 28 whose one end is positioned against the spring hooking projection 27 of the device base 10. The cover 29 is pressed against the stopper 29 of the cover 24 to determine its normal position. Reference numeral 21 denotes a conductive plate having elasticity, one end of which is fixed to the short-circuit movable plate 15 by means such as caulking, and the other end of which a contact 22 is fixed by means such as caulking. Reference numeral 30 is a screw hole for the cover, and 31 is a cover mounting screw.
いま電源端子11と負荷端子12の間に電磁石装置1,2の
感動電流以上の電流が流れるとプランジャピン９が吸引
され、この吸引動作と連動して短絡可動板15もばね27の
力に抗して突起23のまわりに回動しこの短絡可動板15に
固着された導体板21の先端に固着された接点22が接触部
16に接触して第６図に示すようになり、導体板21によっ
て接触圧力が出される。このため、両負荷端子12は短絡
可動板15を介して短絡されることになる。When a current larger than the moving current of the electromagnet devices 1 and 2 flows between the power supply terminal 11 and the load terminal 12, the plunger pin 9 is attracted, and the short-circuit movable plate 15 also resists the force of the spring 27 in conjunction with this attraction operation. Then, the contact 22 fixed to the tip of the conductor plate 21 fixed to the short-circuit movable plate 15 by rotating around the protrusion 23 is a contact portion.
As shown in FIG. 6 by contacting with 16, the contact pressure is generated by the conductor plate 21. Therefore, both load terminals 12 are short-circuited via the short-circuit movable plate 15.
また、このような動作はいずれか一方の電磁石装置１
または２だけが感動した場合でも同じであり、感動電流
以上の電流が流れていない電磁石装置のプランジャピン
９は第１のつば9aにより短絡可動板15に引き上げられ
る。In addition, such an operation is performed by one of the electromagnet devices 1
The same is true even when only 2 is moved, and the plunger pin 9 of the electromagnet device in which a current equal to or more than the moving current does not flow is pulled up to the short-circuit movable plate 15 by the first collar 9a.
回路が短絡されている間に外部の回路保護装置により
事故電流がしゃ断されると電磁石1,2は吸引力がなくな
るので短絡可動板15はばね13により復帰し、第５図の状
態となる。If the fault current is cut off by an external circuit protection device while the circuit is short-circuited, the electromagnets 1 and 2 lose their attractive force, so that the short-circuit movable plate 15 is restored by the spring 13 and the state shown in FIG.
なお、この実施例は極数が２極の場合であるが、第１
の実施例のように３極に適用でき、さらに４極以上にも
適用可能である。In this embodiment, the number of poles is 2
The present invention can be applied to 3 poles as in the above embodiment, and can also be applied to 4 poles or more.
この発明の負荷保護装置によれば、任意の電路の１つ
に所定値以上の電流が流れるとその電路の電磁石装置が
動作し、電磁石装置の動作により共通の短絡手段が連動
して複数の電路を短絡し、負荷を保護する。したがっ
て、過電流耐量の小さい負荷を簡単な構成により効果的
に保護することができ、しかも電磁石装置のため復旧が
簡単である。また複数の電磁石装置に対して共通の短絡
手段を設けたため、相間のそれぞれに常開接点を接続す
る場合よりも構成および配線が簡単にできるという効果
がある。According to the load protection device of the present invention, when a current of a predetermined value or more flows in one of the arbitrary electric paths, the electromagnet device of the electric path operates, and the operation of the electromagnet device causes the common short-circuiting means to interlock with each other to make a plurality of electric paths. Short circuit to protect the load. Therefore, it is possible to effectively protect a load having a small overcurrent withstand capability with a simple configuration, and moreover, the restoration is easy because of the electromagnet device. Further, since the common short-circuit means is provided for the plurality of electromagnet devices, there is an effect that the configuration and wiring can be made simpler than the case where the normally open contact is connected to each of the phases.
第１図はこの発明の第１の実施例の通常時の配線図、第
２図は電磁石装置が動作したときの配線図、第３図は異
常時の時間対電流の関係図、第４図は第２の実施例の分
解斜視図、第５図はその通常時の断面図、第６図は異常
時の断面図である。 １〜３……電磁石装置、４……短絡手段、５〜７……電
路、９……可動体であるプランジャピンFIG. 1 is a wiring diagram of a first embodiment of the present invention at a normal time, FIG. 2 is a wiring diagram when an electromagnet device operates, FIG. 3 is a time-current relation diagram at the time of abnormality, and FIG. Is an exploded perspective view of the second embodiment, FIG. 5 is a sectional view of the normal state, and FIG. 6 is a sectional view of an abnormal state. 1-3 ... Electromagnet device, 4 ... Short-circuiting means, 5-7 ... Electric path, 9 ... Plunger pin which is a movable body
Claims (1)
に流れる電流が所定値以上になると動作する可動体を有
する複数の電磁石装置と、これらの電磁石装置の各前記
可動体の動作に連動して前記電路間を短絡する共通の短
絡手段とを備えた負荷保護装置。1. A plurality of electromagnet devices, each of which is provided in each of a plurality of electric paths, and has a movable body that operates when a current flowing in each of the electric paths exceeds a predetermined value, and an operation of each of the movable bodies of these electromagnet devices. And a common short-circuit means for short-circuiting the electric circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1133801A JP2677866B2 (en) | 1989-05-26 | 1989-05-26 | Load protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1133801A JP2677866B2 (en) | 1989-05-26 | 1989-05-26 | Load protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02312132A JPH02312132A (en) | 1990-12-27 |
| JP2677866B2 true JP2677866B2 (en) | 1997-11-17 |
Family
ID=15113352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1133801A Expired - Lifetime JP2677866B2 (en) | 1989-05-26 | 1989-05-26 | Load protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2677866B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2520566A (en) * | 2013-11-26 | 2015-05-27 | Dynex Semiconductor Ltd | Fail Safe Switch |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6086727A (en) * | 1983-10-19 | 1985-05-16 | 金邦電気株式会社 | Fuse box for preventing 3-phase 3-wired defect phase |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS485224U (en) * | 1971-06-03 | 1973-01-22 |
-
1989
- 1989-05-26 JP JP1133801A patent/JP2677866B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6086727A (en) * | 1983-10-19 | 1985-05-16 | 金邦電気株式会社 | Fuse box for preventing 3-phase 3-wired defect phase |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02312132A (en) | 1990-12-27 |
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