JPH02312132A - Load protector - Google Patents
Load protectorInfo
- Publication number
- JPH02312132A JPH02312132A JP13380189A JP13380189A JPH02312132A JP H02312132 A JPH02312132 A JP H02312132A JP 13380189 A JP13380189 A JP 13380189A JP 13380189 A JP13380189 A JP 13380189A JP H02312132 A JPH02312132 A JP H02312132A
- Authority
- JP
- Japan
- Prior art keywords
- load
- short
- circuit
- current
- protection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001012 protector Effects 0.000 title 1
- 230000001681 protective effect Effects 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Breakers (AREA)
Abstract
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。[Detailed description of the invention] [Industrial application field] This invention is a rectifier using a power semiconductor.
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。The present invention relates to a load protection device that uses an electrical device such as a non-contact contactor as a load and protects such a load from current exceeding a predetermined value such as overcurrent.
負荷のｉｌＡ電流からの保護は、一般にヒユーズや回路
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。Protection of loads from ilA currents is generally achieved by installing circuit protection devices such as fuses and circuit breakers in the electrical circuits. In addition, in order to effectively protect loads with a small overcurrent withstand capacity, current limiting breakers are used that suppress fault current to a small level and cut it off.
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、ＩＩＩ流ブ
レーカあるいはヒユーズによっても短絡事故等による過
ｉｔ流からの保護は完全ではなかった。For example, in electrical circuits in which power semiconductors are used, the power semiconductors have a small overcurrent withstand capacity, so even III-current breakers or fuses do not provide complete protection from overcurrents caused by short circuits and the like.
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
。In addition, in order to provide sufficient protection for semiconductor devices, a device is integrated with a circuit breaker to bypass the semiconductor device and cut off the fault current at the same time when a short circuit occurs (Japanese Patent Laid-Open No. 59-66030). is considered, but
The structure is complicated, and it is disadvantageous in terms of space and cost to construct a circuit by combining a large number of them.
さらに、高速Ｉｌｌｌ上流−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、ヒユーズは溶断する
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。Furthermore, although it is possible to protect the circuit from fault current by using a high-speed Illll upstream fuse, it is necessary to replace the fuse with a new one each time it blows, which is not only time-consuming but also uneconomical.
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。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a load protection device that can effectively protect a load with a small overcurrent withstand capacity with a simple configuration and that is easy to restore.
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
する複数の電磁石装置と、前記電磁石装置の動作に連動
して前記電路間を短絡する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 that are provided in each of a plurality of electric circuits and operates when the current flowing in each electric circuit reaches a predetermined value or more, and a short circuit between the electric circuits in conjunction with the operation of the electromagnet device. It is equipped with a short-circuiting means.
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。According to the configuration of the present invention, when a current of a predetermined value or more flows through one of the arbitrary electrical circuits, the electromagnetic device of that electrical circuit operates, and the short circuiting means interlocks with the operation of the electromagnetic device to short-circuit the plurality of electrical circuits, Protect the load.
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。Therefore, a load with a small overcurrent withstand capacity can be effectively protected with a simple configuration, and since it is an electromagnetic device, restoration is easy.
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 based on FIGS. 1 to 3. That is, this load protection device consists of a plurality of electromagnet devices 1 to 3 and short circuit means 4.
複数のＴＬ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
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、器台ｌＯに設けたＴＬ源端
子１１と負荷端子１２との間に接続され、電源端子１１
が回路保護装置１３に接続され、負荷端子１２がｔｌ、
荷１４に接続される。電磁石装置１〜３の懇動電流は、
負荷１４の定格電流よりも大きく、かつ回路保護装置１
３の動作電流よりも小さく設定している。こうして、電
磁石袋Ｔ！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■３は回路しゃ断器を実施例としている。The plurality of TL magnet devices 1 to 3 are provided in each of the plurality of electric circuits 5 to 7, and operate when the current flowing in each electric circuit 5 to 7 reaches a predetermined value or more. The electromagnetic devices 1 to 3 are composed of a coil 8, a plunger pin 9, and a spring (not shown) for setting a moving current. Each coil 8 is connected between a TL source terminal 11 and a load terminal 12 provided on the instrument stand lO, and
is connected to the circuit protection device 13, and the load terminal 12 is connected to tl,
It is connected to the load 14. The driving current of electromagnet devices 1 to 3 is
larger than the rated current of the load 14, and the circuit protection device 1
The operating current is set smaller than the operating current of No. 3. In this way, electromagnetic bag T! 1 to 3 are connected between the load 14 and the circuit protection device 13, and operate before the circuit protection device 13 when an abnormal current flows through the load 14. The circuit protection device (3) is an example of a circuit breaker.
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 shorting means 4 short-circuits the electrical circuits 5 to 7 in conjunction with the operation of the electromagnet devices 1 to 3. This shorting means 4 consists of a shorting movable plate 15 connected to the plunger pin 9 and a contact portion 16 connected to the load terminal 12 so that the shorting movable plate 15 comes into contact with and leaves.
第１図は通常の状態であり、短絡手段４の短絡可動板１
５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 the normal state, and the shorting movable plate 1 of the shorting means 4
5 is separated from the contact portion 16, and the power input through the circuit protection device 13 is supplied to the load 14 through the electromagnetic 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ＴＭ、流等の過電流が
流れると電磁石袋ｒｆ１１〜３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。Figure 2 shows the situation when an accident occurs, and when an overcurrent such as a short circuit TM or current higher than the current of the electromagnet devices 1 to 3 flows through the load 14, the electromagnetic bags rf11 to 3 are activated, and a short circuit occurs at the plunger pin 9. By interlocking the movable plate 15, the short-circuit movable plate 15 contacts the contact portion 16 to short-circuit the electric circuits 5 to 7, and the abnormal current flows through the short-circuit movable plate 15 and no longer flows to the load 14.
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ＴＬ磁石装ｆｆ１〜３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。On the other hand, an abnormal current flows through the circuit protection device 13 through the short-circuit movable plate 15, so the electric circuits 5 to 7 are cut off, and when the abnormal current stops, the TL magnet devices ff1 to 3 are restored by their own springs, and at the same time the short circuit is interrupted. The movable plate 15 is returned to its original position, returning to the state shown in 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。Ｑｌはこの負荷保護装置がない場合に負荷１４を
流れる事故ＴＬ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１〜２ＩＩＩＳ程度である。FIG. 3 shows a diagram of the relationship between time and current when an accident occurs. Ql is the accident TL flow that flows through the load 14 in the absence of this load protection device, and Q2 is the accident TL flow that flows through the load 14 when the short circuit movable plate 15 contacts the contact portion 16.
Q3 is the current flowing through the load 14 when this load protection device is installed, and the abnormal current flowing through the load 14 is about 1 until the electromagnet devices 1 to 3 operate. ~2IIIS.
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Ｔｉ、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Ｉ３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 a Ti current of a predetermined value or more flows through one of the electric lines 5 to 7, the electromagnet device 1. 2 or 3 operates, electromagnetic device 1, 2
Or, by the operation of step 3, the short-circuiting means 4 works together to short-circuit the plurality of electric circuits 5 to 7, thereby protecting the load 14. On the other hand, electric circuits 5 to 7
Due to the short circuit, the circuit protection device 13 operates to cut off the electrical circuit 5
~7 is cut off. Therefore, this load protection device can suppress the abnormal current flowing to the load faster than the circuit protection device I3 performs the cutoff operation. therefore,
A load with a small overcurrent withstand capacity can be effectively protected with a simple configuration, and recovery is easy because of the electromagnet devices 1 to 3.
また、電磁石装Ｗ！、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でき、負荷保護装置を含めた見掛は
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, electromagnetic equipment W! , 1 to 3 are below the original overcurrent withstand capacity of the load 14 to be protected, protection can be achieved within the entire range of the circuit protection device 13's breaking ability. That is, by setting the operation 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 14 including the load protection device is The overcurrent withstand capacity of the circuit protection device 13 can be dramatically increased, and the circuit protection device 13 can be applied to areas that could not be protected conventionally.
It can be protected by In addition, the breaking current of the circuit protection device 13 increases when the short-circuiting means operates, but since the circuit protection device is installed to withstand all short circuits at the installation point, the breaking current is executed. .
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、ａ荷重４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、複数の電路の各種に回路電流に応動
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るなく
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。In addition, since the short-circuiting means 4 operates when a current of a predetermined value or more flows through one of the electrical circuits 5 to 7, the load 14 can be reliably connected even when an overcurrent flows only to one pole, such as in a one-wire ground fault. The protection effect is great when the a-load 4 includes a semiconductor device or other device with a small overcurrent withstand capacity. For example, there is a switch that responds to the circuit current in each type of multiple electrical circuits, and when an overcurrent is detected and two or more poles are activated, the circuit is short-circuited so that no overcurrent flows to the load. Even if an overcurrent flows through only one pole due to a ground fault, etc., protection is not possible.
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。In addition, the impressed current value can be changed simply by changing the spring loads of the electromagnet devices 1 to 3, which leads to a reduction in parts management costs, and together with a simple structure, it is possible to provide an inexpensive protection device. It becomes possible.
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よりも小さかったが、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新機構を経て可動
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 detected by the load protection device was smaller than that of the circuit protection device 13, but it may be the same. In this case, the electromagnet devices 1 to 3 operate simultaneously with the operation of the electromagnet for short-circuit detection of the circuit protection device 13, and from the time when the electromagnet of the circuit protection device operates to the time when the movable contact performs the opening operation via the breaking mechanism. It is possible to shorten the time required.
この発明の第２の実施例を第４図ないし第６図に示す。A second embodiment of the invention is shown in FIGS. 4 to 6.
すなわち、この負荷保護装置は２掻構造である。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、？ｄＧｔ端
子１１および負荷端子１２がそれぞれ止めねし１６．１
７で器台１０に固定されると、電路１７も固定される。That is, this load protection device has a two-screw structure. 17 is an internal electric circuit made of copper wire or the like, with an air-core coil 8 formed in the middle, and both ends of the circuit are connected to the power supply terminal 11 and the load terminal 12 by welding or the like, respectively. The dGt terminal 11 and the load terminal 12 each have a set screw 16.1.
When it is fixed to the device stand 10 at step 7, the electric line 17 is also fixed.
負荷端子１２は接触部Ｉ６を一体に形成している。２０
は中央に貫通孔２０ａを存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。The load terminal 12 integrally forms a contact portion I6. 20
is a cylinder made of an insulator with a through hole 20a in the center,
It is inserted into the air core portion 8a of the coil 8.
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を存し、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′ｒ！ｌ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に形成された受は溝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は溝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、ｉ４ 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ｌＯのばね掛は突起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、−万端を短絡可動板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
しめ等の手段で同着されている。３０はカバー用のねし
孔、３１はカバー取付ねじである。The plunger pin 9 is a rod-shaped body made of magnetic material, and has a first
a second rib 9b near the first rib 9a in the center, and a through hole 20a of the insulating cylinder 20.
'r! with coil 8. l magnet device 1,
form 2. The short-circuit movable plate 15 is made of a rigid conductor such as an iron plate, and has a pair of protrusions 23 protruding from both sides of the end thereof, and the receiver formed on the stand 10 is inserted into the groove 10a, and the short-circuit movable plate of the cover 24 is inserted into the groove 10a. It is held by a presser 26 so as to be rotatable about a straight line connecting the pair of protrusions 23 . Further, the short-circuiting movable plate 15 has a groove 25 in the pair of plunger pin receivers, and by inserting the portion between the first flange 9a and the second flange 9b of the plunger pin 9, the i4 magnet device 1.2 is inserted. When the plunger pin 9 is attracted, the first flange 9a rotates the plunger pin 9 around the protrusion 23 in the suction direction. Further, near the center of the short-circuiting movable plate 15, the spring hook of the device stand 10 contacts the protrusion 27 with the other end of the spring 28, which applies a restoring force in the opposite direction to the direction in which it is rotated by the operation of the plunger pin 9. It is pressed against a stopper 29 of the cover 24, and its normal position is determined. Reference numeral 21 designates an elastic conductor plate, which is fixed at one end to the shorting movable plate 15 by caulking or the like, and a contact 22 is attached to the other end by caulking or the like. 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１０
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、再負荷端子１２は短絡可動板１５を介して短絡され
ることになる。Now, between the power supply terminal 11 and the load terminal 12, an electromagnet device 1,
If a current higher than the current shown in 2 flows, the plunger pin 10
is attracted, and in conjunction with this suction operation, the shorting movable plate 15 also rotates around the protrusion 23 against the force of the spring 27, and is fixed to the tip of the conductive plate 21 fixed to the shorting movable plate 15. The contact point 22 comes into contact with the contact portion 16 as shown in FIG. 6, and contact pressure is exerted by the conductor plate 21. Therefore, the reload terminal 12 is 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ｌ！
！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ｔＭ１石装置のプランジ
中ビン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。Moreover, such an operation is performed by either one of the electromagnetic devices l!
! The same is true even if only 1 or 2 is impressed, and the plunger bottle 9 of the tM1 stone device in which no current higher than the impressed current flows 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 electromagnet 1.2 loses its attractive force, and the short-circuiting movable plate 15 is returned by the spring 13, resulting in 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。Although this embodiment deals with the case where the number of poles is two, it can be applied to three poles as in the first embodiment, and can also be applied to four or more poles.
この発明の負荷保護装置によれば、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
と動作する複数の電磁石装置と、前記電磁石装置の動作
に連動して前記電路間を短絡する短絡手段とを備えたた
め、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
簡単であるという効果がある。According to the load protection device of the present invention, a plurality of electromagnet devices are provided in each of a plurality of electric circuits and operate when the current flowing in each electric circuit reaches a predetermined value or more; Since the device is equipped with a short-circuiting means for short-circuiting the device, it is possible to effectively protect a load with a small overcurrent withstand capacity with a simple configuration, and since it is an electromagnetic device, recovery is easy.
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
第５図
第６図
手続補正書（陪
平成 １年 ８月 ４日Fig. 1 is a wiring diagram of the first embodiment of this invention during normal operation, Fig. 2 is a wiring diagram when the electromagnet device is in operation, Fig. 3 is a diagram of the relationship between time and current during abnormality, and Fig. 4 5 is an exploded perspective view of the second embodiment, FIG. 5 is a sectional view thereof in a normal state, and FIG. 6 is a sectional view in an abnormal state. 1-3... Electromagnet device, 4... Short-circuiting means, 5-7.
...Electrical circuit diagram 5 diagram 6 procedure amendment (August 4, 1999)
Claims (1)
が所定値以上になると動作する複数の電磁石装置と、前
記電磁石装置の動作に連動して前記電路間を短絡する短
絡手段とを備えた負荷保護装置。A load comprising a plurality of electromagnet devices provided in each of a plurality of electric circuits and activated when the current flowing through each electric circuit reaches a predetermined value or more, and a short circuit means that shorts the electric circuits in conjunction with the operation of the electromagnet device. Protective device.
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 true JPH02312132A (en) | 1990-12-27 |
| JP2677866B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2520566A (en) * | 2013-11-26 | 2015-05-27 | Dynex Semiconductor Ltd | Fail Safe Switch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS485224U (en) * | 1971-06-03 | 1973-01-22 | ||
| 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 |
-
1989
- 1989-05-26 JP JP1133801A patent/JP2677866B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS485224U (en) * | 1971-06-03 | 1973-01-22 | ||
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2520566A (en) * | 2013-11-26 | 2015-05-27 | Dynex Semiconductor Ltd | Fail Safe Switch |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2677866B2 (en) | 1997-11-17 |
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