JPH0340713A - Power supply circuit for overcurrent tripping device - Google Patents
Power supply circuit for overcurrent tripping deviceInfo
- Publication number
- JPH0340713A JPH0340713A JP17407389A JP17407389A JPH0340713A JP H0340713 A JPH0340713 A JP H0340713A JP 17407389 A JP17407389 A JP 17407389A JP 17407389 A JP17407389 A JP 17407389A JP H0340713 A JPH0340713 A JP H0340713A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- transistor
- resistor
- circuit
- control
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（ａ業上の利用分野）
本発明は電線保護を目的として回路遮断器等に搭載され
る過電流引き外し装置において、回路に安定した電力を
供給する電源回路に関するものである。Detailed Description of the Invention (Field of Application in Industry A) The present invention relates to a power supply circuit that supplies stable power to a circuit in an overcurrent tripping device installed in a circuit breaker etc. for the purpose of protecting electric wires. It is.
電路に発生した事故電流を検出し、事故電流の大きさに
対応する特定の時間が経過した後、該電路を開路し、電
線の熱的保護を行うことを目的とした引き外し信号を出
力する過電流引き外し装置の電源回路は第３図において
、通常は制御回路３の２系統の出力をハイインピーダン
スとすることによりトリップコイル２を不動作とし、Ｎ
ＰＮ型トランジスタ５を導通させて後段の定電圧回路６
に電流を供給し定電圧を発生する。Detects a fault current that has occurred in an electrical circuit, and after a specific time corresponding to the magnitude of the fault current has elapsed, opens the electrical circuit and outputs a trip signal for the purpose of thermally protecting the electrical wire. In Fig. 3, the power supply circuit of the overcurrent trip device normally sets the outputs of the two systems of the control circuit 3 to high impedance to make the trip coil 2 inoperable, and the N
The PN type transistor 5 is made conductive and the subsequent constant voltage circuit 6 is connected.
Supplies current to generate a constant voltage.
次に、電路に過電流が通電した場合、電路に設けた変流
器１からの信号に基いて過電流検出回路７が検出信号を
反限時回路８に出力し、同回路８の引き外し信号により
、前記制御回路３の２系統の出力がロウインピーダンス
となり、前記トリップコイル２が励磁され、前記ＮＰＮ
型トランジスタ５を不導通とし、電流を全て前記トリッ
プコイル２に供給する。４は抵抗、９は共通線である。Next, when an overcurrent is applied to the electric circuit, the overcurrent detection circuit 7 outputs a detection signal to the inverse time limit circuit 8 based on the signal from the current transformer 1 installed in the electric circuit, and the circuit 8 triggers a tripping signal. As a result, the outputs of the two systems of the control circuit 3 become low impedance, the trip coil 2 is excited, and the NPN
The type transistor 5 is made non-conductive and all current is supplied to the trip coil 2. 4 is a resistance, and 9 is a common line.
従来装置においては、第３図においてＮＰＮ型トランジ
スタ５のコレクターエミッタ間電圧ＶＣＥは抵抗４の端
子電圧ｖＦｌとベース−エミッタ間電圧ＶａＥの和とな
り、前記ＮＰＮ型トランジスタ５の消費電力が大きくな
るため（第２図参照）、大電力用のＮＰＮ型トランジス
タを使用し、放熱フィン等の放熱手段を施して前記ＮＰ
Ｎ型トランジスタ用の占有容積を大きくとらなければな
らなかった。In the conventional device, in FIG. 3, the collector-emitter voltage VCE of the NPN transistor 5 is the sum of the terminal voltage vFl of the resistor 4 and the base-emitter voltage VaE, and the power consumption of the NPN transistor 5 increases. (see Figure 2), a high-power NPN transistor is used, and heat dissipation means such as heat dissipation fins are provided to
A large volume had to be taken up for the N-type transistor.
本発明の目的は以上のような問題を解消した過電流引き
外し装置用電源回路を提供することにある。An object of the present invention is to provide a power supply circuit for an overcurrent tripping device that eliminates the above-mentioned problems.
（、課題を解決するための手段〕
このような課題を解決するため本発明は、第４図に示す
ようにトランジスタとしてＰＮＰ型トランジスタを使用
し、制御回路３の一方の出力を反転させ、前記ＰＮＰ型
トランジスタ５１のエミッタ端子を変流器１の出力端子
に、コレクタ端子を定電圧回路６の入力端子に、ベース
端子を反転した前記制御回路３の出力端に、それぞれ接
続する。(Means for Solving the Problems) In order to solve such problems, the present invention uses a PNP type transistor as a transistor as shown in FIG. 4, inverts one output of the control circuit 3, and The emitter terminal of the PNP transistor 51 is connected to the output terminal of the current transformer 1, the collector terminal to the input terminal of the constant voltage circuit 6, and the base terminal to the inverted output terminal of the control circuit 3.
本発明によれば、ＰＮＰ型トランジスタはベース電流を
流すために必要なコレクターベース間に接続する抵抗が
省略できるので、前記ＰＮＰ型トランジスタのコレクタ
ーエミッタ間電圧はベース−エミッタ間電圧とほぼ等し
くなり、前記ＰＮＰ型トランジスタの消費電力は小さく
なる（第４図参照）。According to the present invention, since the PNP type transistor can omit a resistor connected between the collector and the base necessary for flowing the base current, the voltage between the collector and emitter of the PNP type transistor becomes almost equal to the voltage between the base and emitter, The power consumption of the PNP transistor is reduced (see FIG. 4).
以下、図面を参照して本発明の実施例を詳細に説明する
。Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図において、 ＰＮＰ型トランジスタ５１のコレク
タ端子を変流器出力端に、ベース端子を抵抗３−６を介
して制御用トランジスタ３−７のコレクタ端子に、エミ
ッタ端子を定電圧回路６の入力端に各々接続し、前記Ｐ
ＮＰ型トランジスタの工よツタ端子とベース端子に抵抗
４を接続し、前記抵抗４の前記ＰＮＰ型トランジスタ５
１のエミッタ端子側の接続端に抵抗３−３を介して制御
用ツェナーダイオード３−４のカソード端を接続する。In FIG. 1, the collector terminal of the PNP transistor 51 is connected to the current transformer output terminal, the base terminal is connected to the collector terminal of the control transistor 3-7 via the resistor 3-6, and the emitter terminal is connected to the input of the constant voltage circuit 6. Connect each end to the P
A resistor 4 is connected to the base terminal and the base terminal of the NP type transistor, and the PNP type transistor 5 of the resistor 4 is
The cathode end of a control Zener diode 3-4 is connected to the connection end on the emitter terminal side of No. 1 via a resistor 3-3.
前記制御用ツェナーダイオード３−４のアノード端を分
岐し、方を前記制御用トランジスタ３−７のベース端子
に、他方を抵抗３−５を介し前記制御用トランジスタ３
−７のエミッタ端子と共に共通線９へ接続する。The anode end of the control Zener diode 3-4 is branched, one end is connected to the base terminal of the control transistor 3-7, and the other end is connected to the control transistor 3 through a resistor 3-5.
It is connected to the common line 9 together with the emitter terminal of -7.
さらに前記ＰＮＰ型トランジスタ５１のエミッタ端子に
トリップコイル２の一端を接続し、他端を制御用ダイオ
ード３−２のカソード端子とサイリスタ３−１のアノー
ド端子とじ接続する。前記制御用ダイオード３−２のア
ノード端子は前記制御用ツェナーダイオード３−４のカ
ソード端子に接続し、前記サイリスタ３−１のカソード
端子は前記共通線９に、またゲート端子は反限時回路の
引き外し信号出力端に接続する。Further, one end of the trip coil 2 is connected to the emitter terminal of the PNP transistor 51, and the other end is connected to the cathode terminal of the control diode 3-2 and the anode terminal of the thyristor 3-1. The anode terminal of the control diode 3-2 is connected to the cathode terminal of the control Zener diode 3-4, the cathode terminal of the thyristor 3-1 is connected to the common line 9, and the gate terminal is connected to the pull of the anti-time circuit. Connect to the disconnect signal output terminal.
第２図に示すようにＰＮＰ型トランジスタの消費電力は
、従来のＮＰＮ型トランジスタの消費電力より小さくな
るので、ＰＮＰ ｌ−ランラスタ５１に小電力用の小型
のものを使用でき、さらに放熱フィン等の放熱手段を必
要とせず、占有容器を小さくすることができる。また、
トランジスタの発熱量が減少するので、熱による前記ト
ランジスタの破壊や他の回路に与える熱的影響が小さく
なり、過電流引き外し回路の信頼性を向上することがで
きる。As shown in FIG. 2, the power consumption of a PNP transistor is lower than that of a conventional NPN transistor, so a small PNP l-run raster 51 for low power consumption can be used, and a heat dissipation fin, etc. No heat dissipation means is required, and the occupied container can be made smaller. Also,
Since the amount of heat generated by the transistor is reduced, the destruction of the transistor due to heat and the thermal influence on other circuits are reduced, and the reliability of the overcurrent tripping circuit can be improved.
さらに、前記トランジスタの損失が小さくなるので電源
回路の効率が向上する。Furthermore, since the loss of the transistor is reduced, the efficiency of the power supply circuit is improved.
第を図は本発明の実施例である過電流引き外し装置の電
源回路図、
第２図はＮＰＮ型トランジスタとＰＮＰ型トランジスタ
の変流器電疏に対する消費電力のグラフ、第３図は従来
のＡ電流中き外し装置のブロック図、
第４図は本発明を採用した過ＴＬ流引き外し装置のブロ
ック図である。
ｌ・・・変流器、
２・・・トリップコイル、
３・・・制御回路、
３−１・・・サイリスタ、
３−２・・・制御用ダイオード、
３−３・・・抵抗、
３−４・・・制御用ツェナーダイオード、３−５・・・
抵抗、
３−６・・・抵抗、
３−７・・・制御用トランジスタ、
４・・・抵抗、
５・・・トランジスタ、
・・・定電圧回路、
・・・過電流検出回路、
・・・反限時回路、
・・・共通線。
Ｑ◆漆獄どFigure 1 is a power supply circuit diagram of an overcurrent tripping device according to an embodiment of the present invention, Figure 2 is a graph of power consumption for current transformer currents of NPN type transistors and PNP type transistors, and Figure 3 is a graph of the power consumption of a conventional overcurrent tripping device. A block diagram of a device for removing current during excessive TL flow. FIG. 4 is a block diagram of a device for removing excessive TL current, which employs the present invention. l... Current transformer, 2... Trip coil, 3... Control circuit, 3-1... Thyristor, 3-2... Control diode, 3-3... Resistor, 3- 4... Zener diode for control, 3-5...
Resistor, 3-6...Resistor, 3-7...Control transistor, 4...Resistor, 5...Transistor,... Constant voltage circuit,... Overcurrent detection circuit,... Counter-time circuit, ...common line. Q◆Urushigokudo
Claims (1)
力端子に、ＰＮＰ型トランジスタのエミッタ端子を接続
し、定電圧回路の入力端子に前記ＰＮＰ型トランジスタ
のコレクタ端子を接続し、制御回路の出力端子に前記Ｐ
ＮＰ型トランジスタのベース端子を接続したことを特徴
とする過電流引き外し装置用電源回路。1) Connect the emitter terminal of a PNP transistor to the output terminal of a current transformer inserted in a conductor through which current flows in the electric circuit, connect the collector terminal of the PNP transistor to the input terminal of a constant voltage circuit, and perform control. The above P is connected to the output terminal of the circuit.
A power supply circuit for an overcurrent tripping device, characterized in that a base terminal of an NP type transistor is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17407389A JPH0340713A (en) | 1989-07-07 | 1989-07-07 | Power supply circuit for overcurrent tripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17407389A JPH0340713A (en) | 1989-07-07 | 1989-07-07 | Power supply circuit for overcurrent tripping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0340713A true JPH0340713A (en) | 1991-02-21 |
Family
ID=15972167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17407389A Pending JPH0340713A (en) | 1989-07-07 | 1989-07-07 | Power supply circuit for overcurrent tripping device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0340713A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5355758A (en) * | 1976-10-29 | 1978-05-20 | Fuji Electric Co Ltd | Overcurrent relay |
| JPS56153919A (en) * | 1980-03-31 | 1981-11-28 | Merlin Gerin | Electronic type tripping device |
| JPS5755722A (en) * | 1980-09-17 | 1982-04-02 | Tokyo Shibaura Electric Co | Circuit breaker |
| JPH01164229A (en) * | 1987-12-18 | 1989-06-28 | Matsushita Electric Ind Co Ltd | power protection device |
-
1989
- 1989-07-07 JP JP17407389A patent/JPH0340713A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5355758A (en) * | 1976-10-29 | 1978-05-20 | Fuji Electric Co Ltd | Overcurrent relay |
| JPS56153919A (en) * | 1980-03-31 | 1981-11-28 | Merlin Gerin | Electronic type tripping device |
| JPS5755722A (en) * | 1980-09-17 | 1982-04-02 | Tokyo Shibaura Electric Co | Circuit breaker |
| JPH01164229A (en) * | 1987-12-18 | 1989-06-28 | Matsushita Electric Ind Co Ltd | power protection device |
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