JPH07105819A - Trouble detecting circuit breaking apparatus - Google Patents

Trouble detecting circuit breaking apparatus

Info

Publication number
JPH07105819A
JPH07105819A JP25181693A JP25181693A JPH07105819A JP H07105819 A JPH07105819 A JP H07105819A JP 25181693 A JP25181693 A JP 25181693A JP 25181693 A JP25181693 A JP 25181693A JP H07105819 A JPH07105819 A JP H07105819A
Authority
JP
Japan
Prior art keywords
circuit
power supply
loads
overcurrent
current
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.)
Pending
Application number
JP25181693A
Other languages
Japanese (ja)
Inventor
Masahiro Katayanagi
正宏 片柳
Toshiyuki Onishi
利之 大西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Toshiba Transport Engineering Inc
Original Assignee
Toshiba Corp
Toshiba Transport Engineering Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Toshiba Transport Engineering Inc filed Critical Toshiba Corp
Priority to JP25181693A priority Critical patent/JPH07105819A/en
Publication of JPH07105819A publication Critical patent/JPH07105819A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To continue electricity communication to other loads even if earthing trouble occurs on one lead among a plurality of loads. CONSTITUTION:When any over current runs due to earthing trouble on any of loads, a trouble detecting circuit breaking apparatus detects the over current by a current transformer 8 and operates a relay circuit 11 by contactless operation to force a self trip circuit 5 of a circuit breaker 6 make shutting operation and simultaneously with the shutting operation of the trouble detecting part on the electric power supply apparatus side, to farce the circuit breaker 6 make shutting operation. In this way, by keeping only the circuit breaker 6 which connected to a load on which the earthing trouble occurs in closed state and separating it from other normal loads, prescribed electric power can be supplied to the normal loads through a circuit breaker 6 when the electric power of an electric power supply apparatus is restored.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、高圧電源から複数の
負荷各々に配線遮断器を介して電源を供給する電源供給
回路において、地絡事故のために負荷のいずれかに過電
流が流れるようになった時にその負荷を安全に切り離す
ための故障検知遮断装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply circuit for supplying power from a high voltage power supply to each of a plurality of loads via a wiring breaker so that an overcurrent may flow to any of the loads due to a ground fault. The present invention relates to a failure detection / interruption device for safely disconnecting the load when it becomes.

【0002】[0002]

【従来の技術】一般に電気車では、駆動車輪を駆動する
ための電動機を回転駆動するための主電源装置と共に、
車両内の照明灯、空調設備、エアコンプレッサなどに電
力を供給するための補助電源装置が搭載されている。
2. Description of the Related Art Generally, in an electric vehicle, together with a main power supply device for rotationally driving an electric motor for driving drive wheels,
It is equipped with an auxiliary power supply device for supplying electric power to lighting lamps, air conditioning equipment, air compressors, etc. in the vehicle.

【0003】このような補助電源装置は、従来、図3に
示すような故障検知遮断装置を備えており、地絡事故が
発生して過電流が流れた場合にただちに電源を遮断する
ための無接点の故障検知部1Aを備えた電源装置1か
ら、複数の配線遮断器(MCCB1〜MCCB5)2A
〜2Eそれぞれを介して複数の負荷3A〜3Eに電力が
供給されるようにしている。
Conventionally, such an auxiliary power supply device is provided with a failure detection / interruption device as shown in FIG. 3, and there is no means for immediately interrupting the power supply when an overcurrent flows due to a ground fault. From the power supply device 1 including the contact failure detection unit 1A to the plurality of wiring breakers (MCCB1 to MCCB5) 2A
The electric power is supplied to the plurality of loads 3A to 3E via the respective .about.2E.

【0004】[0004]

【発明が解決しようとする課題】ところが、このような
従来の故障検知遮断装置では、地絡事故によっていずれ
かの負荷に過電流が流れるようになった場合の故障検知
遮断動作に問題点があった。
However, such a conventional fault detection and interruption device has a problem in the fault detection and interruption operation when an overcurrent starts to flow to any one of the loads due to a ground fault. It was

【0005】すなわち、図4に示すように負荷3A〜3
Eのいずれか(これをいま、負荷3Xとする)に地絡事
故が発生し、過電流が電源装置1から各配線遮断器2A
〜2Eに流れるようになると、まず故障検知部1Aが過
電流を検出して無接点動作して電流出力を遮断して過電
流の通流をただちに停止する。ところが、この場合、無
接点の故障検知部1Aの過電流に対する反応が速いため
に、地絡事故を起こした負荷3Xに接続されている配線
遮断器2Xが過電流検出による機械的な遮断動作を行な
う前に故障検知部1Aが過電流保護動作してしまう。こ
のため、次に電源復帰操作した時にも同じ負荷3Xに過
電流が流れ、やはり、その配線遮断器2Xが動作する前
に電源装置1側の故障検知部1Aが再び遮断動作してし
まい、負荷3Xに対する配線遮断器2Xはいつまでたっ
ても遮断動作しないことになる。
That is, as shown in FIG. 4, loads 3A-3
A ground fault occurs in one of the Es (this is now the load 3X), and an overcurrent is generated from the power supply device 1 to each wiring breaker 2A
When the current flows to 2E, the failure detection unit 1A first detects the overcurrent, performs a non-contact operation, interrupts the current output, and immediately stops the overcurrent from flowing. However, in this case, since the non-contact failure detection unit 1A responds quickly to an overcurrent, the wiring breaker 2X connected to the load 3X that has caused the ground fault has a mechanical interruption operation by overcurrent detection. The failure detection unit 1A performs the overcurrent protection operation before the operation. Therefore, when the power is restored next time, an overcurrent flows through the same load 3X, and the fault detection unit 1A on the side of the power supply device 1 again shuts off before the wiring breaker 2X operates. The wiring breaker 2X for 3X will not perform the breaking operation forever.

【0006】このため、従来の故障検知遮断装置では、
一部の負荷に地絡事故が発生すると、補助電源装置1に
接続されているすべての負荷の電源供給を停止してしま
わなければならず、故障が発生すればすぐに車庫入れし
て故障修復するまでは使用できなくなり、運用効率が悪
い問題点があった。
Therefore, in the conventional failure detection and interruption device,
If a ground fault occurs in some of the loads, the power supply to all the loads connected to the auxiliary power supply device 1 must be stopped, and if a fault occurs, it is put in the garage immediately and the fault is repaired. Until it was done, it could not be used and there was a problem that operational efficiency was poor.

【0007】この発明はこのような従来の問題点に鑑み
てなされたもので、複数の負荷のいずれかに地絡事故が
発生してその回路に過電流が流れるようになっても、そ
の負荷の配線遮断器だけを開放し、他の負荷については
補助電源装置から引き続き電源を供給して使用すること
ができるようにした故障検知遮断装置を提供することを
目的とする。
The present invention has been made in view of the above-mentioned conventional problems, and even if a ground fault occurs in any of a plurality of loads and an overcurrent flows through the circuit, the load still remains. It is an object of the present invention to provide a failure detection / interruption device in which only the wiring circuit breaker is opened and other loads can be continuously supplied with power from the auxiliary power supply device for use.

【0008】[0008]

【課題を解決するための手段】請求項1の発明は、共通
の電源から複数の負荷それぞれに対して配線遮断器を介
して電源を供給する電源供給回路の故障検知遮断回路に
おいて、配線遮断器それぞれから負荷それぞれに流れる
負荷電流の過電流を検出する過電流検出回路と、過電流
検出回路が過電流を検出した時に励磁するリレー回路
と、リレー回路が励磁したことを受けて動作し、配線遮
断器を開放する自己トリップ回路とを備えたものであ
る。
According to a first aspect of the present invention, there is provided a failure detection interruption circuit of a power supply circuit for supplying electric power from a common power source to each of a plurality of loads through the wiring breaker, the wiring breaker. Overcurrent detection circuit that detects the overcurrent of the load current flowing from each of them, a relay circuit that is excited when the overcurrent detection circuit detects the overcurrent, and the relay circuit operates in response to the excitation And a self-trip circuit that opens the circuit breaker.

【0009】請求項2の発明は、請求項1の発明の故障
検知遮断装置において、過電流検出回路として、負荷電
流を所定の比較電流と比較し、この比較電流よりも大き
い負荷電流を検出した時に過電流検出信号を出力する電
流検出部と、電流検出部からの過電流検出信号を受けて
リレー回路を励磁させるリレー動作信号を出力するフリ
ップフロップを備えたものである。
According to a second aspect of the invention, in the fault detecting and interrupting device of the first aspect of the invention, the overcurrent detecting circuit compares the load current with a predetermined comparison current and detects a load current larger than the comparison current. The current detection unit sometimes outputs an overcurrent detection signal, and a flip-flop that receives the overcurrent detection signal from the current detection unit and outputs a relay operation signal for exciting the relay circuit.

【0010】[0010]

【作用】請求項1の発明の故障検知遮断装置では、いず
れかの負荷に地絡事故のために過電流が流れるようにな
った場合、過電流検出回路によってその過電流を検出
し、無接点動作によってリレー回路を動作させて配線遮
断器の自己トリップ回路を遮断動作させ、電源装置側の
故障検知部の遮断動作と同時に配線遮断器も遮断動作さ
せる。
In the fault detecting and interrupting device according to the present invention, when an overcurrent starts to flow to any of the loads due to a ground fault, the overcurrent detection circuit detects the overcurrent and the contactless By the operation, the relay circuit is operated to cut off the self-trip circuit of the wiring breaker, and the wiring breaker is also cut off simultaneously with the breaking operation of the failure detection unit on the power supply unit side.

【0011】こうして、地絡事故が発生した負荷に接続
される配線遮断器だけを遮断状態におくことによって他
の正常な負荷から切り離すことにより、次に電源が回復
した時には、正常な負荷については、通常通りに配線遮
断器を通して所定の電源が供給できるようにする。
In this way, by only disconnecting the wiring breaker connected to the load in which the ground fault has occurred from the other normal loads, the next time the power is restored, , Allow the specified power to be supplied through the wiring breaker as usual.

【0012】請求項2の発明の故障検知遮断装置では、
請求項1の故障検知遮断装置において、過電流検出回路
として、負荷電流を所定の比較電流と比較し、この比較
電流よりも大きい負荷電流を検出した時に過電流検出信
号を出力する電流検出部と、電流検出部からの過電流検
出信号を受けてリレー回路を励磁させるリレー動作信号
を出力するフリップフロップを用いることにより、地絡
事故による過電流が発生した場合に、フリップフロップ
を無接点動作させてリレー回路を動作させ、電源装置の
故障検知部の過電流検出と同時に配線遮断器の自己トリ
ップ回路を遮断動作させ、電源装置側の故障検知部の遮
断動作と同時に配線遮断器も遮断動作させる。
According to another aspect of the present invention, there is provided a failure detection / interruption device,
The fault detection and interruption device according to claim 1, wherein the overcurrent detection circuit compares a load current with a predetermined comparison current, and outputs an overcurrent detection signal when a load current larger than the comparison current is detected. By using a flip-flop that receives the overcurrent detection signal from the current detection unit and outputs a relay operation signal that excites the relay circuit, the flip-flop operates in a non-contact state when an overcurrent occurs due to a ground fault. The relay circuit is operated to shut off the self-trip circuit of the wiring breaker simultaneously with the detection of overcurrent in the failure detector of the power supply unit, and simultaneously with the breaking operation of the failure detector of the power supply unit, the wiring breaker is also shut off. .

【0013】こうして、地絡事故が発生した負荷に接続
される配線遮断器だけを遮断状態におくことによって他
の正常な負荷から切り離すことにより、次に電源が回復
した時には、正常な負荷については、通常通りに配線遮
断器を通して所定の電源が供給できるようにする。
In this way, by only disconnecting the wiring breaker connected to the load in which the ground fault has occurred from the other normal loads, the next time the power is restored, , Allow the specified power to be supplied through the wiring breaker as usual.

【0014】[0014]

【実施例】以下、この発明の実施例を図に基づいて詳説
する。図1は請求項1および請求項2の発明の共通する
実施例の回路構成を示しており、従来例と同様の補助電
源装置のような電源装置1は、出力に過電流が流れた時
に無接点動作によて電源遮断を行なう故障検知部1Aを
備え、この電源装置1から故障検知遮断器4A〜4Eそ
れぞれを介して負荷3A〜3Eそれぞれに電源を供給す
るようになっている。
Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a circuit configuration of a common embodiment of the inventions of claims 1 and 2, and a power supply device 1 such as an auxiliary power supply device similar to the conventional example does not operate when an overcurrent flows to the output. A failure detection unit 1A that shuts off the power by contact operation is provided, and power is supplied from the power supply device 1 to the loads 3A to 3E via the failure detection breakers 4A to 4E, respectively.

【0015】故障検知遮断器4A〜4Eそれぞれは図2
に示す回路構成であり、自己トリップ回路5を備えた配
線遮断器(MCCB)6と、この配線遮断器6から負荷
に電源を供給する電源線7に設けられた変流器(CT)
8と、この変流器8によって検出される電流値を比較電
流と比較し、過電流を検出した時に過電流検出信号を出
力する比較器9と、比較器9からの過電流検出信号を受
けて反転し、“H”信号を出力するフリップフロップ1
0と、このフリップフロップ10の“H”出力によって
動作するリレー(Ry)11を備えている。
Each of the failure detection circuit breakers 4A to 4E is shown in FIG.
And a current transformer (CT) provided on a power line 7 that supplies power to a load from the wiring breaker (MCCB) 6 having the circuit configuration shown in FIG.
8, a comparator 9 that compares the current value detected by the current transformer 8 with a comparison current, and outputs an overcurrent detection signal when an overcurrent is detected, and an overcurrent detection signal from the comparator 9. Flip-flop 1 which inverts and inverts and outputs the "H" signal
0 and a relay (Ry) 11 operated by the “H” output of the flip-flop 10.

【0016】自己トリップ回路付き配線遮断器6の自己
トリップ回路5は、励磁コイル5aとこの励磁コイル5
aの励磁動作によってオフとなる自己トリップ接点5b
とで構成されており、自己トリップ接点5bは配線遮断
器6を同時にオフするようになっている。
The self-trip circuit 5 of the wiring breaker 6 with the self-trip circuit comprises an exciting coil 5a and the exciting coil 5a.
Self trip contact 5b which is turned off by the exciting operation of a
The self-trip contact 5b turns off the wiring breaker 6 at the same time.

【0017】フリップフロップ10のリセット端子には
電源リセット信号を入力し、電源再投入時にリセットす
るようになっている。また、リレー11のリレー接点1
1aの一端は、配線遮断器6の自己トリップ回路5のコ
イル5aに直列に接続されており、リレー接点11aの
他端はスイッチ12を介して接地されている。なお、図
2において、V1は各負荷に対する電源、V2は自己ト
リップ回路5に対する制御電源、V3は各論理回路素子
を動作させるための補助制御電源である。
A power supply reset signal is input to the reset terminal of the flip-flop 10 and reset when the power is turned on again. Also, the relay contact 1 of the relay 11
One end of 1a is connected in series to the coil 5a of the self trip circuit 5 of the wiring breaker 6, and the other end of the relay contact 11a is grounded via the switch 12. In FIG. 2, V1 is a power supply for each load, V2 is a control power supply for the self-trip circuit 5, and V3 is an auxiliary control power supply for operating each logic circuit element.

【0018】こうして、この実施例の故障検知遮断装置
では、配線遮断器6の自己トリップ回路5のトリップ動
作回路を無接点構成にして、過電流検出時の配線遮断器
6の遮断動作をすばやく行なうようにしているのであ
る。
In this way, in the failure detection and interruption device of this embodiment, the trip operation circuit of the self-trip circuit 5 of the wiring breaker 6 has a non-contact structure, and the interruption operation of the wiring breaker 6 at the time of overcurrent detection is quickly performed. I am doing so.

【0019】次に、上記構成の故障検知遮断装置の動作
について説明する。通常時、各故障検知遮断器4A〜4
Eそれぞれの配線遮断器6は投入状態にあり、フリップ
フロップ10の出力は電源リセット入力が行なわれて
“L”で、リレー11は非励磁状態にあり、リレー接点
11aはオフ、したがって、自己トリップ回路5の励磁
コイル5aも非励磁状態にある。
Next, the operation of the fault detection / interruption device having the above configuration will be described. Normally, each failure detection circuit breaker 4A-4
E Each wiring breaker 6 is in the closed state, the output of the flip-flop 10 is “L” after the power reset input is performed, the relay 11 is in the non-excited state, the relay contact 11a is off, and therefore the self-trip The exciting coil 5a of the circuit 5 is also in the non-excited state.

【0020】そこで、電源装置1から電源が供給される
と、故障検知遮断器4A〜4Eそれぞれを通して各負荷
3A〜3Eに電源が供給される。
Therefore, when power is supplied from the power supply device 1, power is supplied to the loads 3A to 3E through the failure detection circuit breakers 4A to 4E, respectively.

【0021】この状態において、いま、1つの負荷、例
えば負荷3Xに地絡事故が発生した時の電源遮断動作を
説明すると、地絡事故が発生した負荷3Xに対して過電
流が流れるようになり、電源装置1の故障検知部1Aは
その過電流を検知して無接点動作によってただちに電源
遮断を行なう。
In this state, the power cutoff operation when a ground fault occurs in one load, for example, the load 3X, will be described. An overcurrent will flow to the load 3X in which the ground fault occurs. The failure detection unit 1A of the power supply device 1 detects the overcurrent and immediately cuts off the power supply by the non-contact operation.

【0022】この電源装置1側の電源遮断動作と並行し
て、地絡事故を起こした負荷3Xが接続されている故障
検知遮断器4X側でも、変流器8が過電流を検出し、比
較器9が過電流検出信号をフリップフロップ10に出力
する。そこで、フリップフロップ10は“H”信号を出
力し、これによってリレー11が励磁され、リレー接点
11aをオンする。この結果、自己トリップ回路5の励
磁コイル5aが一瞬に励磁され、自己トリップ接点5b
をオフし、同時に配線遮断器6もオフする。そして、こ
の一連の動作は、無接点動作となり、従来のように機械
的な動作によって配線遮断器を開放する場合のように遅
くなることがなく、電源装置1側の故障検知部1Aによ
る電源遮断動作とほぼ同時に行なわれる。
In parallel with the power cutoff operation on the side of the power supply device 1, the current transformer 8 detects an overcurrent even on the fault detection breaker 4X side to which the load 3X causing the ground fault is connected, and the comparison is made. The device 9 outputs the overcurrent detection signal to the flip-flop 10. Therefore, the flip-flop 10 outputs an "H" signal, which excites the relay 11 and turns on the relay contact 11a. As a result, the exciting coil 5a of the self trip circuit 5 is instantly excited and the self trip contact 5b
Is turned off, and at the same time, the wiring breaker 6 is also turned off. Then, this series of operations is a non-contact operation, and is not delayed as in the case where the wiring breaker is opened by a mechanical operation as in the conventional case, and the power supply 1 is shut off by the failure detection unit 1A. The operation is performed almost at the same time.

【0023】したがって、この後、電源装置1が自動的
に回復した時には、地絡事故を起こした負荷3Xに接続
されている配線遮断器6だけが開放状態にあって電源装
置1から切り離されており(各配線遮断器は手動によら
なければ再投入できない性質なので)、他の負荷それぞ
れに接続されている配線遮断器それぞれは導通状態にあ
るために電源装置1から再び電源の供給を受けることが
できることになる。
Therefore, after that, when the power supply device 1 is automatically recovered, only the wiring breaker 6 connected to the load 3X in which the ground fault has occurred is opened and disconnected from the power supply device 1. (Because each wiring breaker cannot be closed again without manual operation), the wiring breakers connected to other loads are in the conducting state, so that the power supply unit 1 supplies power again. You will be able to

【0024】こうして、この実施例の故障検知遮断装置
では、負荷のいずれかに地絡事故が発生すれば、それが
接続されている配線遮断器だけを高速で開放動作させて
電源装置から切り離すことができ、この結果、電源装置
の再投入によって他の負荷への電源供給を再開すること
ができるようになる。したがって、特に電気車の補助電
源装置に利用する場合、従来のようにいずれかの負荷に
地絡事故が発生した時にはただちに電源装置を停止して
修理工場に入れ、いずれの負荷に地絡事故が発生したの
かを検査し、その負荷を修理するか取り替えるまで電源
装置の再投入ができなくなるということがなく、地絡事
故が発生した負荷だけを自動的に切り離し、他の正常な
負荷には電源装置を再投入して引き続き電源を供給し続
けることができ、地絡事故発生時の走行への影響を最小
限に抑えることができることになる。
In this way, in the failure detection and interruption device of this embodiment, when a ground fault occurs in any of the loads, only the wiring breaker to which it is connected is opened at high speed to disconnect it from the power supply device. As a result, the power supply to the other loads can be restarted by turning on the power supply again. Therefore, especially when it is used as an auxiliary power supply device for electric vehicles, when a ground fault accident occurs in any of the loads as in the past, immediately stop the power supply device and put it in the repair shop, and in which load the ground fault accident occurs. It will not be impossible to restart the power supply until the load is inspected and repaired or replaced, and only the load in which the ground fault has occurred is automatically disconnected, and the power is supplied to other normal loads. The device can be turned on again and power can be continuously supplied, and the influence on traveling when a ground fault occurs can be minimized.

【0025】[0025]

【発明の効果】以上のように請求項1の発明によれば、
いずれかの負荷に地絡事故のために過電流が流れるよう
になった場合、過電流検出回路によってその過電流を検
出し、無接点動作によってリレー回路を動作させて配線
遮断器の自己トリップ回路を遮断動作させ、電源装置側
の故障検知部の遮断動作と同時に配線遮断器も遮断動作
させるようにしているので、地絡事故が発生した負荷に
接続される配線遮断器だけを遮断状態におくことによっ
て他の正常な負荷から切り離すことにより、次に電源装
置の電源が回復した時には、正常な負荷については通常
通りに配線遮断器を通して所定の電源が供給できるよう
になり、従来のように1つの負荷の地絡事故によってす
べての負荷への電源供給を停止しなければならなくなる
ことがなく、地絡事故の影響を最小限に抑えることがで
きる。
As described above, according to the invention of claim 1,
If an overcurrent starts to flow to any of the loads due to a ground fault, the overcurrent detection circuit detects the overcurrent and operates the relay circuit by non-contact operation to activate the self-trip circuit of the circuit breaker. Since the wiring breaker is turned off at the same time that the failure detection unit on the power supply unit side is turned off, only the wiring breaker connected to the load in which the ground fault has occurred is placed in the turned-off state. By disconnecting it from other normal loads, the next time when the power supply of the power supply unit is restored, it becomes possible to supply a predetermined power through the circuit breaker as usual for normal loads. The power supply to all the loads does not have to be stopped by the ground fault of one load, and the influence of the ground fault can be minimized.

【0026】請求項2の発明によれば、請求項1の故障
検知遮断装置において、過電流検出回路として、負荷電
流を所定の比較電流と比較し、この比較電流よりも大き
い負荷電流を検出した時に過電流検出信号を出力する電
流検出部と、電流検出部からの過電流検出信号を受けて
リレー回路を励磁させるリレー動作信号を出力するフリ
ップフロップを用いているので、地絡事故による過電流
が発生した場合に、フリップフロップを無接点動作させ
てリレー回路を動作させ、電源装置の故障検知部の過電
流検出と同時に配線遮断器の自己トリップ回路を遮断動
作させ、電源装置側の故障検知部の遮断動作と同時に配
線遮断器も遮断動作させることができ、この結果、地絡
事故が発生した負荷に接続される配線遮断器だけを遮断
状態におくことによって他の正常な負荷から切り離すこ
とにより、次に電源装置の電源が回復した時には、正常
な負荷については通常通りに配線遮断器を通して所定の
電源が供給できるようになり、従来のように1つの負荷
の地絡事故によってすべての負荷への電源供給を停止し
なければならなくなることがなく、地絡事故の影響を最
小限に抑えることができる。
According to a second aspect of the present invention, in the fault detection and interruption device of the first aspect, the overcurrent detection circuit compares the load current with a predetermined comparison current and detects a load current larger than the comparison current. Since the current detection part that outputs the overcurrent detection signal and the flip-flop that outputs the relay operation signal that excites the relay circuit when receiving the overcurrent detection signal from the current detection part are used, When a fault occurs, the flip-flop is operated in a non-contact state to operate the relay circuit, and at the same time the overcurrent is detected in the fault detection unit of the power supply unit, the self-trip circuit of the wiring breaker is shut off to detect the fault in the power supply unit. It is possible to disconnect the wiring breaker at the same time as the disconnection operation of the parts. As a result, only the wiring breaker connected to the load in which the ground fault has occurred is placed in the disconnected state. Therefore, when the power supply of the power supply device is restored next time, the predetermined power can be supplied to the normal load through the wiring breaker as usual, when the power supply of the power supply is restored. The power supply to all the loads does not have to be stopped by the ground fault of one load, and the influence of the ground fault can be minimized.

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

【図1】請求項1および請求項2の発明の共通する実施
例の回路図。
FIG. 1 is a circuit diagram of a common embodiment of the inventions of claims 1 and 2.

【図2】上記実施例における故障検知遮断器の回路図。FIG. 2 is a circuit diagram of a failure detection circuit breaker in the above embodiment.

【図3】従来例の回路図。FIG. 3 is a circuit diagram of a conventional example.

【図4】従来例の地絡事故発生時の動作説明図。FIG. 4 is an operation explanatory view of a conventional example when a ground fault occurs.

【符号の説明】[Explanation of symbols]

1 電源装置 1A 故障検知部 3A〜3E 負荷 4A〜4E 故障検知遮断器 5 自己トリップ回路 5a 励磁コイル 5b 自己トリップ接点 6 自己トリップ回路付き配線遮断器 7 電源線 8 変流器 9 比較器 10 フリップフロップ 11 リレー 12 スイッチ 1 Power Supply Device 1A Failure Detection Section 3A-3E Load 4A-4E Failure Detection Breaker 5 Self Trip Circuit 5a Excitation Coil 5b Self Trip Contact 6 Wiring Breaker with Self Trip Circuit 7 Power Line 8 Current Transformer 9 Comparator 10 Flip Flop 11 relay 12 switch

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大西 利之 東京都港区芝浦一丁目1番1号 株式会社 東芝本社事務所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyuki Onishi 1-1-1, Shibaura, Minato-ku, Tokyo Toshiba Head Office Office

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 共通の電源から複数の負荷それぞれに対
して配線遮断器を介して電源を供給する電源供給回路の
故障検知遮断回路において、 前記配線遮断器それぞれから負荷それぞれに流れる負荷
電流の過電流を検出する過電流検出回路と、 前記過電流検出回路が過電流を検出した時に励磁するリ
レー回路と、 前記リレー回路が励磁したことを受けて動作し、前記配
線遮断器を開放する自己トリップ回路とを備えて成る故
障検知遮断装置。
1. In a failure detection and interruption circuit of a power supply circuit for supplying power from a common power source to each of a plurality of loads through a wiring breaker, an excess of a load current flowing from each of the wiring breakers to each of the loads. An overcurrent detection circuit that detects current, a relay circuit that is excited when the overcurrent detection circuit detects an overcurrent, and a self-trip that operates in response to the excitation of the relay circuit and opens the wiring breaker A failure detection and interruption device comprising a circuit.
【請求項2】 前記過電流検出回路として、前記負荷電
流を所定の比較電流と比較し、この比較電流よりも大き
い負荷電流を検出した時に過電流検出信号を出力する電
流検出部と、前記電流検出部からの過電流検出信号を受
けて前記リレー回路を励磁させるリレー動作信号を出力
するフリップフロップを備えて成る請求項1記載の故障
検知遮断装置。
2. An overcurrent detection circuit which compares the load current with a predetermined comparison current and outputs an overcurrent detection signal when a load current larger than the comparison current is detected, and the current detection circuit. 2. The failure detection and interruption device according to claim 1, further comprising a flip-flop that receives an overcurrent detection signal from the detection unit and outputs a relay operation signal that excites the relay circuit.
JP25181693A 1993-10-07 1993-10-07 Trouble detecting circuit breaking apparatus Pending JPH07105819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25181693A JPH07105819A (en) 1993-10-07 1993-10-07 Trouble detecting circuit breaking apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25181693A JPH07105819A (en) 1993-10-07 1993-10-07 Trouble detecting circuit breaking apparatus

Publications (1)

Publication Number Publication Date
JPH07105819A true JPH07105819A (en) 1995-04-21

Family

ID=17228351

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25181693A Pending JPH07105819A (en) 1993-10-07 1993-10-07 Trouble detecting circuit breaking apparatus

Country Status (1)

Country Link
JP (1) JPH07105819A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001178191A (en) * 1999-12-20 2001-06-29 Kawasaki Steel Corp Control method for motor in conveyer for band-shaped material
JP2004519185A (en) * 2001-02-01 2004-06-24 ハイドロ − エアー、インコーポレイテッド Ground fault circuit breaker applicable to aircraft
US7248451B2 (en) 2001-02-01 2007-07-24 Hydro-Aire, Inc. Current fault detector and circuit interrupter and packaging thereof
US7362551B2 (en) 2001-02-01 2008-04-22 Hydro-Aire, Inc. Aircraft applicable circuit imbalance detection and circuit interrupter and packaging thereof
JPWO2020026862A1 (en) * 2018-07-31 2021-09-09 パナソニックIpマネジメント株式会社 Control system, shutoff system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001178191A (en) * 1999-12-20 2001-06-29 Kawasaki Steel Corp Control method for motor in conveyer for band-shaped material
JP2004519185A (en) * 2001-02-01 2004-06-24 ハイドロ − エアー、インコーポレイテッド Ground fault circuit breaker applicable to aircraft
US7248451B2 (en) 2001-02-01 2007-07-24 Hydro-Aire, Inc. Current fault detector and circuit interrupter and packaging thereof
US7362551B2 (en) 2001-02-01 2008-04-22 Hydro-Aire, Inc. Aircraft applicable circuit imbalance detection and circuit interrupter and packaging thereof
US7375937B2 (en) 2001-02-01 2008-05-20 Hydro-Aire, Inc. Current fault detector and circuit interrupter and packaging thereof
US7667935B2 (en) 2001-02-01 2010-02-23 Hydro-Aire, Inc. Aircraft applicable circuit imbalance detection and circuit interrupter and packaging thereof
US7672099B2 (en) 2001-02-01 2010-03-02 Hydro-Aire, Inc. Current fault detector and circuit interrupter and packaging thereof
US7688558B2 (en) 2001-02-01 2010-03-30 Hydro-Aire, Inc. Aircraft applicable circuit imbalance detection and circuit interrupter and packaging thereof
JPWO2020026862A1 (en) * 2018-07-31 2021-09-09 パナソニックIpマネジメント株式会社 Control system, shutoff system

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