JPH04150717A - Overcurrent protective circuit - Google Patents
Overcurrent protective circuitInfo
- Publication number
- JPH04150717A JPH04150717A JP2270947A JP27094790A JPH04150717A JP H04150717 A JPH04150717 A JP H04150717A JP 2270947 A JP2270947 A JP 2270947A JP 27094790 A JP27094790 A JP 27094790A JP H04150717 A JPH04150717 A JP H04150717A
- Authority
- JP
- Japan
- Prior art keywords
- breaker
- power supply
- fuse
- relay winding
- resistor
- 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
- 230000001681 protective effect Effects 0.000 title abstract 3
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ブレーカを用いた過電流保護回路に関し、特
に、直流電源を入力とする直流電源回路に使用する過電
流保護回路に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an overcurrent protection circuit using a breaker, and more particularly to an overcurrent protection circuit used in a DC power supply circuit that receives a DC power supply as an input.
従来の技術
従来のブレーカを用いた過電流保護回路は、電源回路の
入力又は出力に挿入され、ブレーカの定格電流を越える
過電流が流れたときにブレーカが断状態となり、自己の
電源回路及び電源供給先の回路を保護している。Conventional technology A conventional overcurrent protection circuit using a breaker is inserted into the input or output of a power supply circuit, and when an overcurrent exceeding the rated current of the breaker flows, the breaker is turned off, and the circuit breaker shuts off its own power supply circuit and power supply. The circuit to which it is supplied is protected.
発明が解決しようとする課題
従来の過電流保護回路では、直流電源電圧が急激に低下
した場合における過電流や、信号の伝送路等に電源を供
給している場合における雷により線路が一時的に地落す
ることによる過電流など、−時的な過電流でもブレーカ
が断状態になる。これらの場合の過電流は、外部要因に
よるものであり、機器の故障によるものではないので、
ブレーカを導通状態に入れ治せば障害が復旧するが、そ
の間の電力供給が停止してしまうという課題があった。Problems to be Solved by the Invention In conventional overcurrent protection circuits, overcurrent occurs when the DC power supply voltage suddenly drops, or when power is supplied to a signal transmission path, the line is temporarily damaged due to lightning. Even temporary overcurrents, such as overcurrents caused by falling to the ground, can cause the breaker to turn off. The overcurrent in these cases is due to external factors and not due to equipment failure, so
The fault can be recovered by turning the breaker into a conductive state, but there is a problem in that the power supply will be cut off during that time.
本発明は従来の上記実情に鑑みてなされたものであり、
従って本発明の目的は、従来の技術に内在する上記課題
を解決することを可能とした新規な過電流保護回路を提
供することにある。The present invention has been made in view of the above-mentioned conventional situation,
Accordingly, an object of the present invention is to provide a novel overcurrent protection circuit that makes it possible to solve the above-mentioned problems inherent in the conventional technology.
課題を解決するための手段
上記目的を達成する為に、本発明に係る過電流保護回路
は、正極電源入力端子にブレーカを接続し、このブレー
カの他端をダイオードのアノードに接続し、このダイオ
ードのカソードを直流電源回路の正端子に接続し、この
直流電源回路の負端子を負極電源入力端子に接続し、前
記正極電源入力端子と直流電源回路負端子との間にヒユ
ーズと後記リレーのメーク接点とを直列に接続し、前記
ダイオードのアノードに抵抗器を接続し、この抵抗器の
他端をコンデンサに接続し、このコンデンサの他端を前
記負極電源入力端子に接続し、前記コンデンサに並列に
リレーを接続して構成される。Means for Solving the Problems In order to achieve the above object, the overcurrent protection circuit according to the present invention connects a breaker to the positive power input terminal, connects the other end of this breaker to the anode of a diode, and connects the overcurrent protection circuit to the positive power input terminal. Connect the cathode of the DC power supply circuit to the positive terminal of the DC power supply circuit, connect the negative terminal of this DC power supply circuit to the negative power supply input terminal, and connect the fuse and the make of the relay described below between the positive power supply input terminal and the DC power supply circuit negative terminal. A resistor is connected to the anode of the diode, the other end of this resistor is connected to a capacitor, the other end of this capacitor is connected to the negative power input terminal, and a resistor is connected in series to the anode of the diode. It consists of connecting a relay to.
実施例
次に、本発明をその好ましい一実施例について図面を参
照して具体的に説明する。Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.
第１図は本発明の一実施例を示す回路ブロック構成図で
ある０本実施例では、過電流保護回路が直流電源回路８
の入力側に挿入された場合が示されている。FIG. 1 is a circuit block configuration diagram showing one embodiment of the present invention. In this embodiment, the overcurrent protection circuit is a DC power supply circuit 8.
The case where it is inserted on the input side of is shown.
第１図において、直流電源回路８に付加される過電流保
護回路は、ダイオード６を介して通常使用されるブレー
カ３が断状態になると作用する、抵抗器９、コンデンサ
１０及びリレー巻線４で構成される時限回路と、リレー
巻線４のメーク接点５によってブレーカ３と並列に接続
されるヒユーズ７とを備えて構成されている。In FIG. 1, the overcurrent protection circuit added to the DC power supply circuit 8 includes a resistor 9, a capacitor 10, and a relay winding 4, which is activated when a normally used breaker 3 is turned off via a diode 6. The fuse 7 is connected in parallel to the breaker 3 by the make contact 5 of the relay winding 4.
以下に本発明の詳細な説明する。電源入力端子１及び２
間に供給される直流電圧が急激に上昇した場合には、入
力電流が過大となり、まずブレーカ３が断状態となる。The present invention will be explained in detail below. Power input terminals 1 and 2
When the DC voltage supplied between them suddenly increases, the input current becomes excessive and the breaker 3 is first turned off.
ブレーカ３が断状態となると、リレー巻線４の両端は抵
抗器５及びコンデンサ１０の時定数に従い放電が起き、
リレー巻線４の感動電圧以下に達した一定時間後にリレ
ー巻ａ１４のメーク接点５が閉じる。従って、今度はヒ
ユーズ７を通して再び直流電源回路８に電源を供給する
ことができる。When the breaker 3 is turned off, discharge occurs at both ends of the relay winding 4 according to the time constant of the resistor 5 and capacitor 10.
The make contact 5 of the relay winding a14 closes after a certain period of time when the voltage of the relay winding 4 reaches or below. Therefore, power can now be supplied to the DC power supply circuit 8 again through the fuse 7.
ここで、リレーの動作を抵抗器９とコンデンサ１０とに
より一定時間遅延させて、ヒユーズ７に直ちに接続させ
な〜）ようにしているのは、入力電源電圧の急激な低下
の様な外部の異常現象が正常に戻るまでのタイミングを
確保するためである。Here, the reason why the operation of the relay is delayed for a certain period of time by resistor 9 and capacitor 10 and is not connected to fuse 7 immediately is due to an external abnormality such as a sudden drop in the input power supply voltage. This is to ensure the timing until the phenomenon returns to normal.
発明の詳細
な説明したように、本発明によれば、通常使用されてい
るブレーカが断状態になった場合一定時間後にヒユーズ
を断状態にあるブレーカと並列に接続することにより、
入力電源電圧の急変等外部要因による過電流でブレーカ
が断状態になった場合に短時間で障害を救済することが
できるという効果が得られる。DETAILED DESCRIPTION OF THE INVENTION According to the present invention, when a normally used breaker becomes OFF, a fuse is connected in parallel with the breaker that is OFF after a certain period of time.
When the breaker is turned off due to an overcurrent caused by an external factor such as a sudden change in the input power supply voltage, the effect can be obtained that the fault can be relieved in a short time.
第１図は本発明の一実施例を示す回路ブロック構成図で
ある。
１・・・正極電源入力端子、２・・・負極電源入力端子
、３・・・ブレーカ、４・・・リレー巻線、５・・・メ
ーク接点、６・・・ダイオード、８・・・ヒユーズ、９
・・・抵抗器、１０・・・コンデンサ
第
図FIG. 1 is a circuit block diagram showing an embodiment of the present invention. 1... Positive power input terminal, 2... Negative power input terminal, 3... Breaker, 4... Relay winding, 5... Make contact, 6... Diode, 8... Fuse , 9
...Resistor, 10...Capacitor diagram
Claims (1)
端をダイオードのアノードに接続し、該ダイオードのカ
ソードを直流電源回路の正端子に接続し、該直流電源回
路の負端子を負極電源入力端子に接続し、前記正極電源
入力端子と前記直流電源回路負端子との間にヒューズと
後記リレーのメーク接点とを直列に接続し、前記ダイオ
ードのアノードに抵抗器を接続し、該抵抗器の他端と前
記負極電源入力端子との間にコンデンサを接続し、該コ
ンデンサに並列にリレーを接続したことを特徴とする過
電流保護回路。Connect a breaker to the positive power input terminal, connect the other end of the breaker to the anode of the diode, connect the cathode of the diode to the positive terminal of the DC power supply circuit, and connect the negative terminal of the DC power supply circuit to the negative power input terminal. A fuse and a make contact of a relay described below are connected in series between the positive power supply input terminal and the negative terminal of the DC power supply circuit, a resistor is connected to the anode of the diode, and the resistor and other An overcurrent protection circuit characterized in that a capacitor is connected between the terminal and the negative power input terminal, and a relay is connected in parallel to the capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2270947A JP2605946B2 (en) | 1990-10-09 | 1990-10-09 | Overcurrent protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2270947A JP2605946B2 (en) | 1990-10-09 | 1990-10-09 | Overcurrent protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04150717A true JPH04150717A (en) | 1992-05-25 |
| JP2605946B2 JP2605946B2 (en) | 1997-04-30 |
Family
ID=17493232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2270947A Expired - Lifetime JP2605946B2 (en) | 1990-10-09 | 1990-10-09 | Overcurrent protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2605946B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887766A (en) * | 2014-03-31 | 2014-06-25 | 华中科技大学 | Parallel generator circuit breaker |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100933887B1 (en) * | 2008-11-25 | 2009-12-23 | 김정욱 | Metal utensil with print pattern |
-
1990
- 1990-10-09 JP JP2270947A patent/JP2605946B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887766A (en) * | 2014-03-31 | 2014-06-25 | 华中科技大学 | Parallel generator circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2605946B2 (en) | 1997-04-30 |
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