JPH08138523A - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JPH08138523A JPH08138523A JP6281026A JP28102694A JPH08138523A JP H08138523 A JPH08138523 A JP H08138523A JP 6281026 A JP6281026 A JP 6281026A JP 28102694 A JP28102694 A JP 28102694A JP H08138523 A JPH08138523 A JP H08138523A
- Authority
- JP
- Japan
- Prior art keywords
- line
- terminal
- circuit
- neutral
- side terminal
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/338—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers also responsive to wiring error, e.g. loss of neutral, break
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、接点部を挿入した主電
路に異常な電流が流れると接点部を強制的に開極させる
回路遮断器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker for forcibly opening a contact when an abnormal current flows in a main circuit in which the contact is inserted.
【０００２】[0002]
【従来の技術】従来より、この種の回路遮断器には、大
きく分類すると、主電路に流れる短絡電流や過負荷電流
等の過電流に応答して接点部を強制的に開極する開閉機
構部を設けた配線保護用あるいはモータ等の負荷保護用
の回路遮断器と、主電路に流れる漏洩電流あるいは地絡
電流等の漏電電流を検出する零相変流器の出力に応答し
て接点部を強制的に開極する開閉機構部を設けた漏電保
護用の回路遮断器と、両者の機能を有する回路遮断器と
があり、その用途に応じてそれぞれ用いられている。2. Description of the Related Art Conventionally, a circuit breaker of this type is roughly classified into a switching mechanism for forcibly opening a contact in response to an overcurrent such as a short circuit current or an overload current flowing in a main circuit. In response to the output of the circuit breaker for protecting the wiring or the load protection of the motor, etc., and the output of the zero-phase current transformer that detects the leakage current such as the leakage current or ground fault current flowing in the main circuit. There are a circuit breaker for leakage protection provided with an opening / closing mechanism section for forcibly opening the circuit, and a circuit breaker having both functions, which are used depending on their applications.
【０００３】図７は従来の回路遮断器の回路構成を示す
図であり、配電線の電圧線及び中性線が各々接続される
電圧線端子１ａ及び中性線端子１ｂを有する電源側端子
部１と負荷側端子部２との間に接点部３を挿入して主電
路を形成し、主電路に短絡電流が流れた場合に開閉機構
部４を駆動して接点部３を強制的に開極させる駆動コイ
ル５と、主電路に流れる過負荷電流による発熱を検知し
て開閉機構部を駆動するサーマルリレー６とを主電路の
電圧線側線路Ｌに挿入するとともに、主電路を１次側と
する零相変流器ＣＴが設けてある。零相変流器ＣＴの２
次側はＩＣ２１を有する制御部２０に接続されており、
漏電によって零相変流器ＣＴの１次側である主電路に流
れる電流が不平衡状態になると２次側に出力が現れ、そ
の零相変流器ＣＴの出力が制御部２０に入力される。制
御部２０のＩＣ２１は、主電路間に励磁コイル１２を介
して接続されたダイオードブリッジＤＢにより全波整流
された電圧にて動作する。また、制御部２０では、零相
変流器ＣＴの出力が所定値以上になればサイリスタＳＣ
Ｒ2 をターンオンする。このサイリスタＳＣＲ2 は、開
閉機構部４を駆動するための励磁コイル１２と直列に主
電路間に挿入されており、サイリスタＳＣＲ2 がターン
オンすることで励磁コイル１２に励磁電流が流れて開閉
機構部４が駆動され接点部３が開極されるのである。ま
た、この回路遮断器にはテストスイッチ２２が設けてあ
り、テストスイッチ２２をオンすることで零相変流器Ｃ
Ｔに強制的に１次電流を供給し、制御部２０によって開
閉機構部４を駆動させて接点部３を開極させる動作テス
トを行うことができるようになっている。FIG. 7 is a diagram showing a circuit configuration of a conventional circuit breaker, and a power source side terminal portion having a voltage line terminal 1a and a neutral line terminal 1b to which a voltage line and a neutral line of a distribution line are respectively connected. 1 is formed between the load side terminal portion 1 and the load side terminal portion 2 to form a main electric circuit, and when a short circuit current flows in the main electric circuit, the switching mechanism portion 4 is driven to forcibly open the contact portion 3. A drive coil 5 to be poled and a thermal relay 6 for detecting heat generation due to an overload current flowing in the main electric circuit to drive an opening / closing mechanism section are inserted into a voltage line side line L of the main electric circuit, and the main electric circuit is connected to the primary side. A zero-phase current transformer CT is provided. Zero-phase current transformer CT 2
The next side is connected to the control unit 20 having an IC 21,
When the current flowing in the main electric path which is the primary side of the zero-phase current transformer CT becomes unbalanced due to leakage, an output appears on the secondary side, and the output of the zero-phase current transformer CT is input to the control unit 20. . The IC 21 of the control unit 20 operates at a voltage that is full-wave rectified by the diode bridge DB connected between the main electric paths via the exciting coil 12. Further, in the control unit 20, if the output of the zero-phase current transformer CT becomes a predetermined value or more, the thyristor SC
Turn on R 2 . This thyristor SCR 2 is inserted between the main electric circuit in series with the exciting coil 12 for driving the opening / closing mechanism section 4, and when the thyristor SCR 2 is turned on, an exciting current flows through the exciting coil 12 to cause the opening / closing mechanism section. 4 is driven and the contact portion 3 is opened. Further, a test switch 22 is provided in this circuit breaker, and by turning on the test switch 22, the zero-phase current transformer C
It is possible to perform an operation test in which the primary current is forcibly supplied to T and the opening / closing mechanism unit 4 is driven by the control unit 20 to open the contact unit 3.
【０００４】一方、回路遮断器の電源側端子部１に接続
される配電線は、異常電圧が発生しないように大地に接
地された中性線と、電圧線とに分けられており、上述の
ようにこれと対応して回路遮断器の電源側端子部１も電
圧線が接続される電圧線端子１ａと、中性線が接続され
る中性線端子１ｂとに分けてある。そして、配電線を回
路遮断器に接続する場合には、配電線の電圧線を電源側
端子部１の電圧線端子１ａに接続し、中性線を中性線端
子１ｂに正しく接続しなければならない。On the other hand, the distribution line connected to the power source side terminal section 1 of the circuit breaker is divided into a neutral line grounded to the ground so that an abnormal voltage is not generated and a voltage line. Thus, correspondingly, the power supply side terminal portion 1 of the circuit breaker is also divided into the voltage line terminal 1a to which the voltage line is connected and the neutral line terminal 1b to which the neutral line is connected. When connecting the distribution line to the circuit breaker, the voltage line of the distribution line must be connected to the voltage line terminal 1a of the power source side terminal unit 1 and the neutral line must be correctly connected to the neutral line terminal 1b. I won't.
【０００５】[0005]
【発明が解決しようとする課題】ところが、回路遮断器
に配電線を接続する場合に、工事作業者が誤って電圧線
を回路遮断器の中性線端子１ｂに、中性線を電圧線端子
１ａに接続してしまうおそれがあり、このような誤接続
がされた場合には回路遮断器が所定の機能を果たさなく
なってしまう可能性があるという問題があった。However, when connecting a distribution line to a circuit breaker, a construction worker mistakenly connects the voltage wire to the neutral wire terminal 1b of the circuit breaker and the neutral wire to the voltage wire terminal. There is a possibility that the circuit breaker may be connected to 1a, and if such an incorrect connection is made, the circuit breaker may not perform a predetermined function.
【０００６】本発明は上記問題点の解決を目的とするも
のであり、配電線が誤接続された場合に回路の遮断を行
い安全性の向上が図れる回路遮断器を提供しようとする
ものである。An object of the present invention is to solve the above problems, and to provide a circuit breaker capable of improving the safety by breaking the circuit when a distribution line is erroneously connected. .
【０００７】[0007]
【課題を解決するための手段】請求項１の発明は、上記
目的を達成するために、配電線の電圧線及び中性線が各
々接続される電圧線端子及び中性線端子を有する電源側
端子部と負荷側端子部との間に接点部を挿入して主電路
を形成し、接点部の閉極時に主電路に流れる短絡電流及
び過負荷電流を検出すると接点部を開極して主電路を遮
断する開閉機構部を備えた回路遮断器において、外部の
接地部と接続される接地接続部と、この接地接続部と電
源側端子部の中性線端子との電位差が所定値以上の場合
に開閉機構部を駆動させて接点部を開極させる中性線電
位応答手段とを設けたことを特徴とする。In order to achieve the above object, a power supply side having a voltage line terminal and a neutral line terminal to which a voltage line and a neutral line of a distribution line are respectively connected. The contact section is inserted between the terminal section and the load side terminal section to form the main circuit, and when the short circuit current and overload current flowing in the main circuit are detected when the contact section is closed, the contact section is opened and the main circuit is opened. In a circuit breaker equipped with an opening / closing mechanism that shuts off an electric circuit, a potential difference between a ground connection part connected to an external ground part and a neutral wire terminal of the ground connection part and the power supply side terminal part is a predetermined value or more. In this case, neutral line potential response means for driving the opening / closing mechanism section to open the contact section is provided.
【０００８】請求項２の発明は、上記目的を達成するた
めに、配電線の電圧線及び中性線が各々接続される電圧
線端子及び中性線端子を有する電源側端子部と負荷側端
子部との間に接点部を挿入して主電路を形成し、接点部
の閉極時に主電路に流れる漏洩電流及び地絡電流のよう
な漏電電流を検出する零相変流器と、この零相変流器の
出力に応じて接点部を開極し主電路を遮断する開閉機構
部とを備えた回路遮断器において、外部の接地部と接続
される接地接続部と、この接地接続部と電源側端子部の
中性線端子との電位差が所定値以上の場合に零相変流器
に模擬の漏電電流を発生させて開閉機構部を駆動する模
擬漏電電流発生手段とを設けたことを特徴とする。In order to achieve the above object, a second aspect of the present invention is a power source side terminal portion and a load side terminal having a voltage line terminal and a neutral line terminal to which a voltage line and a neutral line of a distribution line are respectively connected. A zero-phase current transformer that detects a leakage current such as a leakage current or a ground fault current that flows in the main circuit when the contact is closed by forming a main circuit by inserting a contact section between In a circuit breaker having an opening / closing mechanism section that opens a contact section according to the output of a phase current transformer to cut off a main electric path, a ground connection section connected to an external ground section, and this ground connection section. When the potential difference from the neutral wire terminal of the power source side terminal portion is equal to or greater than a predetermined value, the zero phase current transformer is provided with simulated leakage current generating means for driving the switching mechanism section by generating a simulated leakage current. Characterize.
【０００９】請求項３の発明は、請求項１又は請求項２
の発明において、開閉機構部を駆動する励磁コイルと、
電源側端子部の中性線端子と接地接続部との間の電位差
が所定値以上になるとオンされるスイッチング素子との
直列回路を電源側端子部の電圧線端子と接地接続部との
間に設けたことを特徴とする。The invention of claim 3 relates to claim 1 or claim 2.
In the invention of claim 1, an exciting coil for driving the opening / closing mechanism,
A series circuit with a switching element that is turned on when the potential difference between the neutral wire terminal of the power supply side terminal and the ground connection section exceeds a predetermined value is placed between the voltage line terminal of the power supply side terminal section and the ground connection section. It is characterized by being provided.
【００１０】[0010]
【作用】請求項１の発明の構成では、外部の接地部と接
続される接地接続部と、この接地接続部と電源側端子部
の中性線端子との電位差が所定値以上の場合に開閉機構
部を駆動させて接点部を開極させる中性線電位応答手段
とを設けたので、配電線が回路遮断器の電源側端子部に
誤接続された場合に、電源側端子部の中性線端子と接地
接続部との間に所定値以上の電位差が生じ、これにより
中性線電位応答手段が開閉機構部を駆動させて接点部を
強制的に開極し主電路を遮断するものである。According to the structure of the invention of claim 1, when the potential difference between the ground connecting portion connected to the external ground portion and the neutral wire terminal of the ground connecting portion and the power source side terminal portion is equal to or more than a predetermined value, the switching operation is performed. Since the neutral line potential response means for driving the mechanism part to open the contact part is provided, if the distribution line is mistakenly connected to the power supply side terminal part of the circuit breaker, the neutral side of the power supply side terminal part A potential difference of a predetermined value or more is generated between the wire terminal and the ground connection part, which causes the neutral line potential response means to drive the switching mechanism part to forcibly open the contact part and interrupt the main circuit. is there.
【００１１】請求項２の発明の構成では、外部の接地部
と接続される接地接続部と、この接地接続部と電源側端
子部の中性線端子との電位差が所定値以上の場合に零相
変流器に模擬の漏電電流を発生させて開閉機構部を駆動
する模擬漏電電流発生手段とを設けたので、配電線が回
路遮断器の電源側端子部に誤接続された場合に、電源側
端子部の中性線端子と接地接続部との間に所定値以上の
電位差が生じ、これにより模擬漏電電流発生手段が零相
変流器に出力を生じさせ、開閉機構部を駆動させて接点
部を強制的に開極し主電路を遮断するものである。According to the second aspect of the present invention, when the potential difference between the ground connecting portion connected to the external ground portion and the neutral wire terminal of the ground connecting portion and the power source side terminal portion is equal to or more than the predetermined value, it is zero. Since the phase current transformer is provided with a simulated leakage current generating means for generating a simulated leakage current and driving the switching mechanism section, the power supply will not be connected if the distribution line is erroneously connected to the power supply side terminal section of the circuit breaker. A potential difference of a predetermined value or more is generated between the neutral wire terminal of the side terminal portion and the ground connection portion, which causes the simulated leakage current generation means to generate an output to the zero-phase current transformer and drive the switching mechanism portion. The contact is forcibly opened to shut off the main circuit.
【００１２】請求項３の発明の構成では、開閉機構部を
駆動する励磁コイルと、電源側端子部の中性線端子と接
地接続部との間の電位差が所定値以上になるとオンされ
るスイッチング素子との直列回路を電源側端子部の電圧
線端子と接地接続部との間に設けたので、配電線が回路
遮断器の電源側端子部に正常に接続された状態で中性線
が電源側端子部よりも電源側の経路で断線した場合、あ
るいは中性線電位応答手段若しくは模擬漏電電流発生手
段よりも電源側の経路で断線した場合に、主電路の電圧
線側の線路から負荷を介して接地接続部に流れる電流に
より中性線端子と接地接続部との間に電位差が生じ、ス
イッチング素子がオンとなって励磁コイルに電流が供給
され、励磁コイルが励磁されて開閉機構が駆動されるこ
とにより接点部が開極され、正常に結線された状態で中
性線が断線した場合にも接点部を開極して主電路を遮断
することができ、回路遮断器の安全性を向上させること
ができる。According to the third aspect of the present invention, switching is turned on when the potential difference between the exciting coil for driving the opening / closing mechanism section and the neutral wire terminal of the power source side terminal section and the ground connection section exceeds a predetermined value. Since a series circuit with the element is provided between the voltage line terminal of the power supply side terminal and the ground connection part, the neutral wire is connected to the power supply side terminal of the circuit breaker while the neutral wire is the power supply. If the wire is disconnected in the path closer to the power source than the side terminal, or if the wire is disconnected in the path closer to the power source than the neutral line potential response means or simulated leakage current generating means, the load is applied from the line on the voltage line side of the main circuit. The current flowing through the ground connection causes a potential difference between the neutral wire terminal and the ground connection, the switching element turns on, the current is supplied to the exciting coil, and the exciting coil is excited to drive the switching mechanism. The contact part is Is very, even if the neutral line is disconnected in the state of being normally connected by opening the contact portion can block the main electrical circuit, it is possible to improve the safety of the circuit breaker.
【００１３】[0013]
（実施例１）図１は本実施例における回路遮断器の回路
構成を示す図である。この回路遮断器は、配電線の電圧
線及び中性線が各々接続される電圧線端子１ａ及び中性
線端子１ｂを有する電源側端子部１と一対の負荷接続端
子２ａ，２ｂを有する負荷側端子部２との間に接点部３
を挿入して主電路を形成し、主電路に短絡電流が流れた
場合に開閉機構部４を駆動して接点部３を強制的に開極
させる駆動コイル５と、主電路に流れる過負荷電流によ
る発熱を検知して開閉機構部４を駆動するサーマルリレ
ー６とを主電路の電圧線側線路Ｌに挿入して構成される
いわゆる２Ｐ１Ｅタイプのものである。なお、開閉機構
部４は、手動で接点部３を開閉するためのハンドル４ａ
を備えた周知の構造を有するものである。(Embodiment 1) FIG. 1 is a diagram showing a circuit configuration of a circuit breaker in this embodiment. This circuit breaker includes a power source side terminal unit 1 having a voltage line terminal 1a and a neutral line terminal 1b to which a voltage line and a neutral line of a distribution line are respectively connected, and a load side having a pair of load connection terminals 2a and 2b. Contact part 3 between terminal part 2
Is formed to form a main electric path, and when a short circuit current flows in the main electric path, a drive coil 5 that drives the switching mechanism section 4 to forcibly open the contact section 3 and an overload current flowing in the main electric path. This is a so-called 2P1E type in which a thermal relay 6 for detecting the heat generated by the above and driving the opening / closing mechanism section 4 is inserted in the voltage line side line L of the main electric path. The opening / closing mechanism unit 4 includes a handle 4a for manually opening and closing the contact unit 3.
It has a well-known structure with.
【００１４】一方、この回路遮断器には外部の接地部に
接続される接地接続部７が設けてあって、接点部３より
負荷側において主電路と接地接続部７との間に中性線電
位応答手段１０が設けてある。この中性線電位応答手段
１０は、主電路の電圧線側線路Ｌ，中性線側線路Ｎ及び
接地接続部７にそれぞれ接続される電圧線側端子１１
ａ，中性線側端子１１ｂ及び接地端子１１ｃを備えてい
る。電圧線側端子１１ａと接地端子１１ｃとの間には、
ダイオードＤ3 と、励磁コイル１２と、サイリスタＳＣ
Ｒ1 との直列回路が接続してある。また、ダイオードＤ
3 と励磁コイル１２との接続点と接地端子１１ｃとの間
に、ダイオードＤ4 ，抵抗Ｒ1 ，ダイオードＤ1 ，ツェ
ナーダイオードＺＤ及び抵抗Ｒ2 の直列回路が励磁コイ
ル１２及びサイリスタＳＣＲ1 と並列に接続してある。
さらに、抵抗Ｒ2 の両端にコンデンサＣ1 及びダイオー
ドＤ 2 の並列回路を介してサイリスタＳＣＲ1 のゲート
とカソードとを接続してある。また、サイリスタＳＣＲ
1 のアノードとダイオードＤ4 のアノードとは抵抗Ｒ 3
を介して接続してある。なお、電圧線側端子１１ａと中
性線側端子１１ｂとの間には励磁コイル１２を挟んで２
つのサージ吸収素子ＺＮ1 ，ＺＮ2 を接続し、中性線側
端子１１ｂと接地端子１１ｃとの間にもサージ吸収素子
ＺＮ3 を接続してある。On the other hand, this circuit breaker has an external grounding part.
There is a ground connection 7 to be connected,
On the load side, a neutral line cable should be placed between the main circuit and the ground connection 7.
A position response means 10 is provided. This neutral line potential response means
10 is a voltage line side line L, a neutral line side line N, and
Voltage-line-side terminals 11 connected to the ground connection 7 respectively
a, a neutral wire side terminal 11b and a ground terminal 11c are provided.
It Between the voltage line side terminal 11a and the ground terminal 11c,
Diode D3, Exciting coil 12, and thyristor SC
R1A series circuit with is connected. Also, the diode D
3Between the grounding terminal 11c and the connection point between the coil and the exciting coil 12
And the diode DFour, Resistance R1, Diode D1， Tse
Gate diode ZD and resistor R2The series circuit of the excitation coil
Le12 and thyristor SCR1It is connected in parallel with.
Furthermore, the resistance R2Capacitor C on both ends of1And Daio
De D 2Thyristor SCR via parallel circuit1The gate of
And the cathode are connected. Also, the thyristor SCR
1Anode and diode DFourIs the resistance R 3
Connected via. In addition, the voltage line side terminal 11a and the middle
2 with the exciting coil 12 sandwiched between the sex wire side terminal 11b
Two surge absorbing elements ZN1, ZN2Connect the neutral wire side
A surge absorbing element is also provided between the terminal 11b and the ground terminal 11c.
ZN3Are connected.
【００１５】次に、中性線電位応答手段１０の動作につ
いて説明する。まず、配電線の電圧線及び中性線が回路
遮断器の電源側端子部１の電圧線端子１ａ及び中性線端
子１ｂに正しく接続されている場合には、中性線が接地
されているために中性線電位応答手段１０の電圧線側端
子１１ａと中性線側端子１１ｂとの間にはほとんど電位
差が生じない。したがって、ツェナーダイオードＺＤは
導通しないからサイリスタＳＣＲ1 もターンオンせず、
励磁コイル１２には電流が流れないため、開閉機構部４
が駆動されることはない。ただし、この状態で主電路に
短絡電流や過負荷電流が流れた場合には、駆動コイル５
及びサーマルリレー６により開閉機構部４が駆動されて
接点部３が開極する。Next, the operation of the neutral line potential response means 10 will be described. First, when the voltage wire and the neutral wire of the distribution line are correctly connected to the voltage wire terminal 1a and the neutral wire terminal 1b of the power supply side terminal portion 1 of the circuit breaker, the neutral wire is grounded. Therefore, there is almost no potential difference between the voltage line side terminal 11a and the neutral line side terminal 11b of the neutral line potential response means 10. Therefore, since the Zener diode ZD does not conduct, the thyristor SCR 1 also does not turn on,
Since no current flows through the exciting coil 12, the opening / closing mechanism section 4
Is never driven. However, if a short circuit current or overload current flows in the main circuit in this state, the drive coil 5
Further, the thermal relay 6 drives the opening / closing mechanism unit 4 to open the contact unit 3.
【００１６】一方、配電線の電圧線及び中性線が回路遮
断器の電源側端子部１の電圧線端子１ａ及び中性線端子
１ｂにそれぞれ反対に誤接続された場合には、本来中性
線と接続されるはずの主電路の中性線側線路Ｎに電圧線
が接続されることになる。そのため、中性線側線路Ｎと
接地接続部７との間に電位差が生じ、中性線電位応答手
段１０の中性線側端子１１ｂと接地端子１１ｃとの間に
も電位差が生じる。よって、この電位差がツェナー電圧
を越えると、ツェナーダイオードＺＤが導通してサイリ
スタＳＣＲ1 がターンオンする。サイリスタＳＣＲ1 が
ターンオンすれば、励磁コイル１２の一端がサイリスタ
ＳＣＲ1 を介して接地接続部７と導通する。その結果、
中性線側端子１１ｂ−ダイオードＤ4 −励磁コイル１２
−サイリスタＳＣＲ1 −接地端子１１ｃの経路で電流が
流れ、開閉機構部４を駆動して接点部３を開極し主電路
を遮断する。On the other hand, when the voltage line and the neutral line of the distribution line are erroneously connected to the voltage line terminal 1a and the neutral line terminal 1b of the power source side terminal portion 1 of the circuit breaker, respectively, the neutral line is originally neutral. The voltage line is connected to the neutral-line side line N of the main electric path that should be connected to the line. Therefore, a potential difference occurs between the neutral line side line N and the ground connection portion 7, and a potential difference also occurs between the neutral line side terminal 11b and the ground terminal 11c. Therefore, when this potential difference exceeds the Zener voltage, the Zener diode ZD becomes conductive and the thyristor SCR 1 is turned on. When the thyristor SCR 1 is turned on, one end of the exciting coil 12 is electrically connected to the ground connection portion 7 via the thyristor SCR 1 . as a result,
Neutral terminal 11b- diode D 4 - exciting coil 12
- thyristor SCR 1 - current flows through a path of the ground terminal 11c, and opening the contact portion 3 drives the opening and closing mechanism portion 4 to cut off the main path.
【００１７】上記構成によれば、回路遮断器の電源側端
子部１の電圧線端子１ａ及び中性線端子１ｂに配電線の
電圧線及び中性線を誤接続した場合に、中性線電位応答
手段１０により開閉機構部４を駆動して接点部３を開極
させるため、回路が遮断されて誤接続されたまま負荷側
に電源電圧が供給されるのを防止することができ、配電
線接続時の作業ミスを未然に防ぐことができる。According to the above configuration, when the voltage wire and the neutral wire of the distribution line are erroneously connected to the voltage wire terminal 1a and the neutral wire terminal 1b of the power source side terminal portion 1 of the circuit breaker, the neutral wire potential is generated. Since the response mechanism 10 drives the opening / closing mechanism unit 4 to open the contact unit 3, it is possible to prevent the power supply voltage from being supplied to the load side while the circuit is disconnected and erroneously connected. Work mistakes during connection can be prevented.
【００１８】（実施例２）図２は本実施例の回路遮断器
の回路構成を示す図である。図２に示すように、この回
路遮断器の基本回路構成は図７に示す従来例のものとほ
ぼ共通であり、共通する部分には同一の符号を付して説
明は省略し、本実施例の特徴となる部分についてのみ説
明する。(Embodiment 2) FIG. 2 is a diagram showing a circuit configuration of a circuit breaker of this embodiment. As shown in FIG. 2, the basic circuit configuration of this circuit breaker is almost the same as that of the conventional example shown in FIG. 7, the common parts are denoted by the same reference numerals, and the description thereof will be omitted. Only the characteristic parts of the above will be described.
【００１９】本実施例では、実施例１と同様に外部の接
地部に接続される接地接続部７が設けてある。この接地
接続部７と主電路の中性線側線路Ｎとの間に、抵抗
Ｒ1 ，ダイオードＤ1 ，ツェナーダイオードＺＤ及び抵
抗Ｒ2 の直列回路と、サージ吸収素子ＺＮ3 とが接続し
てある。さらに、抵抗Ｒ2 の両端には、抵抗Ｒ4 を介し
てフォトカプラＰＣを構成する発光ダイオードＬＥＤが
接続してある。In this embodiment, as in the first embodiment, the ground connection portion 7 connected to the external ground portion is provided. A series circuit of a resistor R 1 , a diode D 1 , a zener diode ZD and a resistor R 2 and a surge absorbing element ZN 3 are connected between the ground connection 7 and the neutral side line N of the main electric path. is there. Further, a light emitting diode LED that constitutes a photocoupler PC is connected to both ends of the resistor R 2 via the resistor R 4 .
【００２０】一方、制御部２０において励磁コイル１２
と直列に接続されたサイリスタＳＣＲ2 ’は、ゲート電
圧だけでなく発光ダイオードＬＥＤから照射される光に
よってもトリガされるもので、発光ダイオードＬＥＤと
サイリスタＳＣＲ2 ’とでフォトカプラＰＣが構成され
ている。次に、本実施例の回路遮断器における動作につ
いて説明する。まず、電源側端子部１に配電線が正しく
接続された状態では、短絡電流や過負荷電流が流れた場
合に、駆動コイル５あるいはサーマルリレー６により開
閉機構部４が駆動されて接点部３が開極する。また、漏
洩電流や地絡電流のような漏電電流が流れた場合には、
零相変流器ＣＴの１次側に流れる電流が不平衡となって
２次側に出力が生じる。制御部２０においては、零相変
流器ＣＴの２次側出力が所定値を越えたときにＩＣ２１
がサイリスタＳＣＲ2 ’をターンオンする。その結果、
電圧線側線路Ｌ−励磁コイル１２−サイリスタＳＣ
Ｒ2 ’−ダイオードブリッジＤＢ−中性線側線路Ｎの経
路で電流が流れ、開閉機構部４が駆動されて接点部３が
開極する。さらに、テストスイッチ２２を操作すれば、
零相変流器ＣＴの１次電流が強制的に不平衡にされ、漏
電電流が流れた場合と同様にして開閉機構部４が駆動さ
れて接点部３が開極する。On the other hand, in the control unit 20, the exciting coil 12
And thyristors SCR 2 connected in series 'is intended to be triggered by the light emitted from the light emitting diode LED, not only the gate voltage, light emitting diode LED and a thyristor SCR 2' is photocoupler PC out with the configuration There is. Next, the operation of the circuit breaker of this embodiment will be described. First, in the state where the distribution line is properly connected to the power source side terminal unit 1, when a short circuit current or an overload current flows, the opening / closing mechanism unit 4 is driven by the drive coil 5 or the thermal relay 6 and the contact unit 3 is Open the contact. If a leakage current such as a leakage current or a ground fault current flows,
The current flowing in the primary side of the zero-phase current transformer CT becomes unbalanced, and an output is generated in the secondary side. In the control unit 20, when the secondary side output of the zero-phase current transformer CT exceeds a predetermined value, the IC 21
Turns on the thyristor SCR 2 '. as a result,
Voltage line side line L-Excitation coil 12-Thyristor SC
A current flows through the route of R 2 '-diode bridge DB-neutral line side line N, the switching mechanism section 4 is driven, and the contact section 3 opens. Furthermore, if the test switch 22 is operated,
The primary current of the zero-phase current transformer CT is forcibly made unbalanced, and the opening / closing mechanism unit 4 is driven in the same manner as when the leakage current flows, and the contact unit 3 opens.
【００２１】一方、電源側端子部１の電圧線端子１ａ及
び中性線端子１ｂとに配電線の電圧線及び中性線が誤接
続された場合には、主電路の中性線側線路Ｎと接地接続
部７との間に電位差が生じ、この電位差がツェナー電圧
を越えると、ツェナーダイオードＺＤが導通して発光ダ
イオードＬＥＤが発光する。これにより、発光ダイオー
ドＬＥＤと光結合されたサイリスタＳＣＲ2 ’がターン
オンする。サイリスタＳＣＲ2 ’がターンオンすれば、
サイリスタＳＣＲ2 ’とダイオードブリッジＤＢを介し
て励磁コイル１２に電流が流れ、開閉機構部４が駆動さ
れて接点部３が開極するのである。On the other hand, when the voltage line and the neutral line of the distribution line are erroneously connected to the voltage line terminal 1a and the neutral line terminal 1b of the power source side terminal unit 1, the neutral line side line N of the main power line is connected. When a potential difference occurs between the ground connection portion 7 and the ground connection portion 7, and the potential difference exceeds the Zener voltage, the Zener diode ZD becomes conductive and the light emitting diode LED emits light. This turns on the thyristor SCR 2 ′, which is optically coupled to the light emitting diode LED. If the thyristor SCR 2 'turns on,
A current flows through the exciting coil 12 via the thyristor SCR 2 ′ and the diode bridge DB, the opening / closing mechanism section 4 is driven, and the contact section 3 is opened.
【００２２】上述のように、本実施例においては、配電
線が誤接続された場合に中性線側線路Ｎと接地接続部７
との間に生じる電位差がツェナーダイオードＺＤのツェ
ナー電圧を越えたときに励磁コイル１２に電流を流すよ
うにしている。すなわち、抵抗Ｒ1 等とツェナーダイオ
ードＺＤとの直列回路と、フォトカプラＰＣと、励磁コ
イル１２とによって中性線電位応答手段１０’を構成し
てある。As described above, in the present embodiment, when the distribution line is erroneously connected, the neutral line side line N and the ground connecting portion 7 are connected.
A current is caused to flow in the exciting coil 12 when the potential difference generated between and exceeds the Zener voltage of the Zener diode ZD. That is, the series circuit of the resistor R 1 and the like and the Zener diode ZD, the photocoupler PC, and the exciting coil 12 constitute the neutral line potential response means 10 ′.
【００２３】（実施例３）図３は本実施例の回路遮断器
の回路構成を示す図である。図３に示すように、この回
路遮断器の基本回路構成は図７に示す従来例のものとほ
ぼ共通であり、共通する部分には同一の符号を付して説
明は省略する。本実施例の回路遮断器においては、実施
例１と同様に外部の接地部に接続される接地接続部７が
設けてあって、この接地接続部７と主電路の中性線側線
路Ｎとの間に抵抗Ｒ5 を介して零相変流器ＣＴの１次コ
イルｎ1 が設けてある。なお、接地接続部７と中性線側
線路Ｎとの間にはサージ吸収素子ＺＮ4 が挿入してあ
る。(Embodiment 3) FIG. 3 is a diagram showing a circuit configuration of a circuit breaker of this embodiment. As shown in FIG. 3, the basic circuit configuration of this circuit breaker is almost the same as that of the conventional example shown in FIG. 7, and the common parts are denoted by the same reference numerals and the description thereof will be omitted. The circuit breaker of the present embodiment is provided with a ground connecting portion 7 connected to an external ground portion as in the case of the first embodiment. The ground connecting portion 7 and the neutral line side line N of the main circuit are connected to each other. A primary coil n 1 of the zero-phase current transformer CT is provided between the two via a resistor R 5 . A surge absorbing element ZN 4 is inserted between the ground connecting portion 7 and the neutral line side line N.
【００２４】次に、本実施例の回路遮断器における動作
について説明する。まず、電源側端子部１に配電線が正
しく接続された状態では、短絡電流や過負荷電流が流れ
た場合には、駆動コイル５あるいはサーマルリレー６に
より開閉機構部４が駆動されて接点部３が開極する。ま
た、漏洩電流や地絡電流のような漏電電流が流れた場合
には、零相変流器ＣＴの１次側に流れる電流が不平衡と
なって２次側に出力が生じる。制御部２０においては、
零相変流器ＣＴの２次側出力が所定値を越えたときにＩ
Ｃ２１がサイリスタＳＣＲ2 をターンオンする。その結
果、電圧線側線路Ｌ−励磁コイル１２−サイリスタＳＣ
Ｒ2 −ダイオードブリッジＤＢ−中性線側線路Ｎの経路
で電流が流れ、開閉機構部４が駆動されて接点部３が開
極する。さらに、テストスイッチ２２を操作すれば、零
相変流器ＣＴの１次電流が強制的に不平衡にされ、漏電
電流が流れた場合と同様にして開閉機構部４が駆動され
て接点部３が開極する。Next, the operation of the circuit breaker of this embodiment will be described. First, in the state where the distribution line is properly connected to the power source side terminal unit 1, when a short circuit current or an overload current flows, the opening / closing mechanism unit 4 is driven by the drive coil 5 or the thermal relay 6 and the contact unit 3 Opens. Further, when a leakage current such as a leakage current or a ground fault current flows, the current flowing in the primary side of the zero-phase current transformer CT becomes unbalanced and an output is generated in the secondary side. In the control unit 20,
When the secondary side output of the zero-phase current transformer CT exceeds a predetermined value, I
C21 turns on thyristor SCR 2 . As a result, the voltage line side line L-excitation coil 12-thyristor SC
A current flows in the route of R 2 -diode bridge DB-neutral line side line N, the switching mechanism section 4 is driven, and the contact section 3 opens. Further, when the test switch 22 is operated, the primary current of the zero-phase current transformer CT is forcibly made unbalanced, and the opening / closing mechanism section 4 is driven in the same manner as when the leakage current flows, and the contact section 3 Opens.
【００２５】一方、電源側端子部１の電圧線端子１ａ及
び中性線端子１ｂとに配電線の電圧線及び中性線が誤接
続された場合には、主電路の中性線側線路Ｎと接地接続
部７との間に電位差が生じ、これにより両者の間に設け
られた１次コイルｎ1 に電流が流れる。１次コイルｎ1
に流れる電流は零相変流器ＣＴの１次側を不平衡状態と
するため、零相変流器ＣＴの２次側に出力が生じ、制御
部２０においてサイリスタＳＣＲ2 がターンオンする。
サイリスタＳＣＲ2 がターンオンすれば、サイリスタＳ
ＣＲ2 とダイオードブリッジＤＢを介して励磁コイル１
２に電流が流れ、開閉機構部４が駆動されて接点部３が
開極するのである。On the other hand, when the voltage line and the neutral line of the distribution line are erroneously connected to the voltage line terminal 1a and the neutral line terminal 1b of the power source side terminal unit 1, the neutral line side line N of the main electric line is A potential difference is generated between the ground connection portion 7 and the ground connection portion 7, which causes a current to flow in the primary coil n 1 provided between the two. Primary coil n 1
Since the current flowing in the first phase causes the primary side of the zero-phase current transformer CT to be in an unbalanced state, an output is generated on the secondary side of the zero-phase current transformer CT, and the thyristor SCR 2 is turned on in the control unit 20.
If thyristor SCR 2 turns on, thyristor S
Exciting coil 1 via CR 2 and diode bridge DB
An electric current flows through the switch 2, the opening / closing mechanism 4 is driven, and the contact 3 opens.
【００２６】上記構成によれば、主電路の中性線側線路
Ｎと接地接続部７との間に設けられた零相変流器ＣＴの
１次コイルｎ1 から成る模擬漏電電流発生手段により、
電源側端子部１に配電線が誤接続された場合に零相変流
器ＣＴの２次側に出力を生じさせることができる。すな
わち、本来漏電が生じた場合に生じる零相変流器ＣＴの
２次側出力を上記誤接続の場合に模擬的に発生させるこ
とにより、制御部２０が開閉機構部４を駆動し接点部３
を開極するのである。なお、図４に示すように、１次コ
イルｎ1 と直列に接続される抵抗Ｒ5 の代わりに、抵抗
Ｒ5 とダイオードＤ5 とツェナーダイオードＺＤ2 との
直列回路を挿入してもよい。この場合には、中性線側電
路Ｎと接地接続部７との間の電位差がツェナーダイオー
ドＺＤ2のツェナー電位を越えなければ、零相変流器Ｃ
Ｔの１次コイルｎ1 には電流が流れなくすることができ
る。そのため、配電線が電源側端子部１に正常に接続さ
れている状態で中性線側電路Ｎと接地接続部７との間に
生じる僅かな電位差では、１次コイルｎ1 には電流が流
れず誤動作を防止できるものである。According to the above structure, the simulated leakage current generating means is composed of the primary coil n 1 of the zero-phase current transformer CT provided between the neutral side line N of the main circuit and the grounding connection 7. ,
An output can be generated on the secondary side of the zero-phase current transformer CT when a distribution line is erroneously connected to the power source side terminal unit 1. That is, the control unit 20 drives the opening / closing mechanism unit 4 and the contact unit 3 by simulating the secondary side output of the zero-phase current transformer CT that originally occurs when an electric leakage occurs in the case of the above-mentioned incorrect connection.
To open the contact. Incidentally, as shown in FIG. 4, in place of the resistor R 5 is connected to the primary coil n 1 series, it may be inserted a series circuit of a resistor R 5 and the diode D 5 and the Zener diode ZD 2. In this case, if the potential difference between the neutral line side electric circuit N and the ground connection portion 7 does not exceed the Zener potential of the Zener diode ZD 2 , the zero-phase current transformer C
No current can flow in the primary coil n 1 of T. Therefore, when the distribution line is normally connected to the power source side terminal unit 1 and a slight potential difference occurs between the neutral line side electric circuit N and the ground connection unit 7, a current flows through the primary coil n 1. Instead, malfunction can be prevented.
【００２７】（実施例４）本実施例における回路遮断器
の回路構成図を図５に示す。図５に示すように、この回
路遮断器の基本回路構成は従来例及び実施例３のものと
共通であり、共通する部分には同一の符号を付して説明
は省略し、本実施例の特徴となる部分についてのみ説明
する。(Embodiment 4) A circuit configuration diagram of a circuit breaker in this embodiment is shown in FIG. As shown in FIG. 5, the basic circuit configuration of this circuit breaker is the same as that of the conventional example and the third embodiment, the common parts are denoted by the same reference numerals, and the description thereof will be omitted. Only the characteristic parts will be described.
【００２８】本実施例の回路遮断器では、実施例３の回
路遮断器における励磁コイル１２とダイオードブリッジ
ＤＢの入力端との接続点と、接地接続部７との間にサイ
リスタＳＣＲ3 を接続してある。さらに、１次コイルｎ
1 と接地接続部７との間に挿入された抵抗Ｒ3 の代わり
に抵抗Ｒ3 ，ダイオードＤ4 ，ツェナーダイオードＺＤ
3 及び抵抗Ｒ5 の直列回路を挿入してある。そして、抵
抗Ｒ5 の両端にはコンデンサＣ2 とダイオードＤ5 とサ
イリスタＳＣＲ3 のゲート・カソードがそれぞれ並列に
接続してある。In the circuit breaker of this embodiment, a thyristor SCR 3 is connected between the connection point between the exciting coil 12 and the input end of the diode bridge DB in the circuit breaker of the third embodiment and the ground connection 7. There is. Furthermore, the primary coil n
1 and the ground connection portion 7 resistor instead of the inserted resistor R 3 between R 3, diode D 4, a Zener diode ZD
A series circuit of 3 and resistor R 5 is inserted. A capacitor C 2 , a diode D 5, and a gate / cathode of the thyristor SCR 3 are connected in parallel at both ends of the resistor R 5 .
【００２９】次に、本実施例の回路遮断器の動作につい
て説明する。なお、電源側端子部１に配電線が正常に接
続されている場合に、短絡電流や過負荷電流及び漏洩電
流や地絡電流のような漏電電流が流れたときの動作につ
いては、従来例及び実施例３と共通であるから説明は省
略する。ここで、配電線が電源側端子部１に正常に接続
された状態において、配電線の中性線が電源側端子部１
よりも電源側で断線したり外れる場合や、あるいは励磁
コイル１２とサイリスタＳＣＲ3 との直列回路が主電路
に接続された点よりも電源側で断線する場合がある。こ
のような場合には、主電路の電圧線側線路Ｌから負荷側
端子部２及び負荷側端子部２に接続された負荷を介して
接地接続部７に電流が流れる。これにより、負荷に電力
が供給されないにもかかわらず負荷側端子部２に電位差
が発生してしまう。Next, the operation of the circuit breaker of this embodiment will be described. Note that, when the distribution line is normally connected to the power supply side terminal unit 1 and the short circuit current, the overload current, and the leakage current such as the leakage current and the ground fault current flow, the operation of the conventional example and The description is omitted because it is common to the third embodiment. Here, in a state where the distribution line is normally connected to the power supply side terminal unit 1, the neutral wire of the distribution line is the power supply side terminal unit 1.
Than the point at which the series circuit of the exciting coil 12 and the thyristor SCR 3 is connected to the main electric path. In such a case, a current flows from the voltage line side line L of the main electric path to the ground connecting portion 7 via the load side terminal portion 2 and the load connected to the load side terminal portion 2. As a result, a potential difference occurs in the load-side terminal portion 2 even though power is not supplied to the load.
【００３０】そこで、このような電位差が生じた場合に
は、この電位差がツェナーダイオードＺＤ3 のツェナー
電圧を越えるとサイリスタＳＣＲ3 にゲート電圧が印加
されてサイリスタＳＣＲ3 がターンオンし、主電路の電
圧線側線路Ｌ−励磁コイル１２−サイリスタＳＣＲ3 −
接地接続部７の経路で電流が流れて開閉機構部４が駆動
され接点部３が開極する。[0030] Therefore, when such a potential difference occurs, the potential difference thyristor SCR 3 gate voltage is applied to the thyristor SCR 3 exceeds the Zener voltage of the Zener diode ZD 3 is turned on, the main electrical circuit of the voltage Line side line L-Excitation coil 12-Thyristor SCR 3-
A current flows in the path of the ground connection portion 7 to drive the opening / closing mechanism portion 4 and open the contact portion 3.
【００３１】上記構成では、電源側端子部１に配電線が
正常に接続された状態で、中性線が断線したり外れた場
合等において、励磁コイル１２に電流を流すことにより
開閉機構部４を駆動して接点部３を開極させることがで
きる。よって、回路遮断器としての安全性をより向上さ
せることができるのである。 （実施例５）上記実施例１〜実施例４は配電線が２線の
場合についてのものであったが、本実施例における回路
遮断器は、３線の配電線に対応したものである。図６は
本実施例の回路構成を示すものであり、基本回路構成は
実施例４の２線の配電線に対応したものと共通であるか
ら、共通する部分には同一の符号を付して説明は省略す
る。In the above structure, when the distribution line is normally connected to the power source side terminal section 1 and the neutral wire is broken or disconnected, a current is passed through the exciting coil 12 to open / close the opening / closing mechanism section 4. Can be driven to open the contact portion 3. Therefore, the safety as a circuit breaker can be further improved. (Embodiment 5) Although Embodiments 1 to 4 above are for the case where the distribution line has two wires, the circuit breaker in this embodiment corresponds to a distribution wire of three wires. FIG. 6 shows a circuit configuration of the present embodiment. Since the basic circuit configuration is common to that of the two-wire distribution line of the fourth embodiment, common parts are designated by the same reference numerals. The description is omitted.
【００３２】本実施例では、配電線の３本の線のうち１
本が中性線で残りの２本が電圧線となる。電源側端子部
１には２つの電圧線端子１ａ，１ｃと、中性線端子１ｂ
との計３つの端子が設けてある。同じく負荷側端子部２
にも３つの端子を設け、接点部３を挿入して２本の電圧
線側線路Ｌ1 ，Ｌ2 及び中性線側線路Ｎを有する主電路
が形成してある。２本の電圧線側線路Ｌ1 ，Ｌ2 にはそ
れぞれ駆動コイル５とサマルリレー６とが挿入してあ
る。また、主電路を１次側とする零相変流器ＣＴが設け
てある。テストスイッチ２２は２本の電圧線側線路
Ｌ1 ，Ｌ2 間に挿入してあり、一方の電圧線側線路Ｌ2
と中性線側線路Ｎとの間にサージ吸収素子ＺＮ 4 が挿入
してある。In this embodiment, one of the three distribution lines is used.
The book is a neutral wire and the other two are voltage wires. Power supply side terminal
1 has two voltage line terminals 1a and 1c and a neutral line terminal 1b
And a total of three terminals are provided. Similarly, load side terminal 2
Is also provided with three terminals, and the contact point 3 is inserted so that two voltage
Line side track L1, L2And a main circuit having a neutral side line N
Is formed. Two voltage line side lines L1, L2In
The drive coil 5 and the summar relay 6 are inserted respectively.
It In addition, a zero-phase current transformer CT with the main circuit as the primary side is provided.
There is. Test switch 22 has two voltage line side lines
L1, L2It is inserted in between and is one voltage line side line L2
Between the surge absorption element ZN and the neutral side line N FourIs inserted
I have.
【００３３】制御部２０のダイオードブリッジＤＢの入
力側と励磁コイル１２との間に抵抗Ｒ6 ，コンデンサＣ
3 ，Ｃ4 が直列に接続してある。また、励磁コイル１２
の一端とサイリスタＳＣＲ2 との間に別のサイリスタＳ
ＣＲ4 が接続してある。このサイリスタＳＣＲ4 のゲー
トは抵抗Ｒ7 を介してコンデンサＣ3 とコンデンサＣ 4
との接続点に接続してある。さらに、サイリスタＳＣＲ
4 のゲート・カソード間には、抵抗Ｒ8 とコンデンサＣ
5 とが並列に接続してある。Input of diode bridge DB of control unit 20
A resistance R is placed between the force side and the exciting coil 12.6, Capacitor C
3, CFourAre connected in series. In addition, the exciting coil 12
End and thyristor SCR2And another thyristor S
CRFourIs connected. This thyristor SCRFourThe game
Resistance is resistance R7Through the capacitor C3And capacitor C Four
It is connected to the connection point with. Furthermore, the thyristor SCR
FourBetween the gate and cathode of the resistor R8And capacitor C
FiveAnd are connected in parallel.
【００３４】次に、本実施例の回路遮断器における動作
について説明する。まず、電源側端子部１に配電線が正
しく接続された状態では、短絡電流や過負荷電流が流れ
た場合に駆動コイル５あるいはサーマルリレー６により
開閉機構部４が駆動されて接点部３が開極する。また、
漏洩電流や地絡電流のような漏電電流が流れた場合に
は、零相変流器ＣＴの１次側に流れる電流が不平衡とな
って２次側に出力が生じる。制御部２０においては、零
相変流器ＣＴの２次側出力が所定値を越えたときにＩＣ
２１がサイリスタＳＣＲ2 をターンオンする。サイリス
タＳＣＲ2 がターンオンすると抵抗Ｒ7 を介してコンデ
ンサＣ5 が充電され、サイリスタＳＣＲ4のゲートに電
圧が印加されてサイリスタＳＣＲ4 がターンオンする。
その結果、電圧線側線路Ｌ1 −励磁コイル１２−サイリ
スタＳＣＲ4 −サイリスタＳＣＲ2−ダイオードブリッ
ジＤＢ−電圧線側線路Ｌ2 の経路で電流が流れ、開閉機
構部４が駆動されて接点部３が開極する。さらに、テス
トスイッチ２２を操作すれば、零相変流器ＣＴの１次電
流が強制的に不平衡にされ、漏電電流が流れた場合と同
様にして開閉機構部４が駆動されて接点部３が開極す
る。Next, the operation of the circuit breaker of this embodiment will be described. First, when the distribution line is properly connected to the power source side terminal unit 1, when the short circuit current or the overload current flows, the opening / closing mechanism unit 4 is driven by the drive coil 5 or the thermal relay 6 to open the contact unit 3. Polarize. Also,
When a leakage current such as a leakage current or a ground fault current flows, the current flowing in the primary side of the zero-phase current transformer CT becomes unbalanced and an output is generated in the secondary side. In the control unit 20, when the secondary side output of the zero-phase current transformer CT exceeds a predetermined value, the IC
21 turns on thyristor SCR 2 . When the thyristor SCR 2 is turned on, the capacitor C 5 is charged through the resistor R 7 , a voltage is applied to the gate of the thyristor SCR 4 , and the thyristor SCR 4 is turned on.
As a result, a current flows through the path of the voltage line side line L 1 -excitation coil 12 -thyristor SCR 4 -thyristor SCR 2 -diode bridge DB -voltage line side line L 2 and the switching mechanism section 4 is driven to make contact 3 Opens. Further, when the test switch 22 is operated, the primary current of the zero-phase current transformer CT is forcibly made unbalanced, and the opening / closing mechanism section 4 is driven in the same manner as when the leakage current flows, and the contact section 3 Opens.
【００３５】一方、電源側端子部１の電圧線端子１ａ，
１ｃ及び中性線端子１ｂに配電線の電圧線及び中性線が
誤接続された場合には、主電路の中性線側線路Ｎと接地
接続部７との間に電位差が生じ、これにより両者の間に
設けられた１次コイルｎ1 に電流が流れる。１次コイル
ｎ1 に流れる電流は零相変流器ＣＴの１次側を不平衡状
態とすることになるため、零相変流器ＣＴの２次側に出
力が生じ、制御部２０においてサイリスタＳＣＲ2 ，Ｓ
ＣＲ4 がターンオンする。その結果、サイリスタＳＣＲ
2 ，ＳＣＲ4 とダイオードブリッジＤＢを介して励磁コ
イル１２に電流が流れ、開閉機構部４が駆動されて接点
部３が開極するのである。On the other hand, the voltage line terminal 1a of the power source side terminal portion 1,
When the voltage line and the neutral line of the distribution line are erroneously connected to the 1c and the neutral line terminal 1b, a potential difference is generated between the neutral line side line N of the main electric line and the ground connecting portion 7, which causes A current flows through the primary coil n 1 provided between the two. Since the current flowing through the primary coil n 1 causes the primary side of the zero-phase current transformer CT to be in an unbalanced state, an output is generated on the secondary side of the zero-phase current transformer CT, and the thyristor in the control unit 20 is generated. SCR 2 , S
CR 4 turns on. As a result, the thyristor SCR
2 , a current flows through the exciting coil 12 via the SCR 4 and the diode bridge DB, the opening / closing mechanism section 4 is driven, and the contact section 3 is opened.
【００３６】また、実施例４の場合と同様に、配電線が
電源側端子部１に正常に接続された状態において、配電
線の中性線が電源側端子部１よりも電源側で断線したり
外れた場合や、あるいは励磁コイル１２とサイリスタＳ
ＣＲ3 との直列回路が主電路に接続された点よりも電源
側で断線した場合には、主電路の電圧線側線路Ｌ1 から
負荷側端子部２及び負荷側端子部２に接続された負荷を
介して接地接続部７に電流が流れる。これにより、負荷
側端子部２に電位差が発生し、この電位差がツェナーダ
イオードＺＤ3 のツェナー電圧を越えるとサイリスタＳ
ＣＲ3 にゲート電圧が印加されてサイリスタＳＣＲ3 が
ターンオンし、主電路の電圧線側線路Ｌ 1 −励磁コイル
１２−サイリスタＳＣＲ3 −接地接続部７の経路で電流
が流れて開閉機構部４が駆動され接点部３が開極する。Further, as in the case of the fourth embodiment, the distribution line is
Power distribution when normally connected to the power supply side terminal 1.
The neutral wire of the wire is disconnected on the power supply side than the power supply side terminal unit 1.
When it comes off, or the exciting coil 12 and the thyristor S
CR3Power supply rather than the point where the series circuit with is connected to the main circuit
In the case of disconnection on the side, the main line's voltage line side line L1From
Load side terminal part 2 and the load connected to the load side terminal part 2
A current flows through the ground connection 7 through the ground connection 7. This makes the load
A potential difference is generated in the side terminal portion 2, and this potential difference is the Zener
Iodo ZD3When the Zener voltage of is exceeded, the thyristor S
CR3Gate voltage is applied to the thyristor SCR3But
Turn on and turn on the main voltage line L 1-Excitation coil
12-thyristor SCR3-Current through the path of the ground connection 7
Flows, the opening / closing mechanism section 4 is driven, and the contact section 3 opens.
【００３７】[0037]
【発明の効果】請求項１の発明は、配電線の電圧線及び
中性線が各々接続される電圧線端子及び中性線端子を有
する電源側端子部と負荷側端子部との間に接点部を挿入
して主電路を形成し、接点部の閉極時に主電路に短絡電
流あるいは過負荷電流が流れると接点部を開極して主電
路を遮断する開閉機構部を備えた回路遮断器において、
外部の接地部と接続される接地接続部と、この接地接続
部と電源側端子部の中性線端子との電位差が所定値以上
の場合に開閉機構部を駆動させて接点部を開極させる中
性線電位応答手段とを設けたので、配電線が回路遮断器
の電源側端子部に誤接続された場合に、電源側端子部の
中性線端子と接地接続部との間に所定値以上の電位差が
生じ、これにより中性線電位応答手段が開閉機構部を駆
動させて接点部を強制的に開極し主電路を遮断すること
ができ、誤接続された場合の安全性を確保するとともに
配線作業時の誤接続の防止を図ることができるという効
果がある。According to the invention of claim 1, a contact is provided between a power source side terminal portion and a load side terminal portion having a voltage line terminal and a neutral line terminal to which a voltage line and a neutral line of a distribution line are respectively connected. Circuit breaker equipped with an opening / closing mechanism that opens the contact section and interrupts the main circuit when a short circuit current or overload current flows in the main circuit when the contact section is closed. At
When the potential difference between the ground connection portion connected to the external ground portion and the ground connection portion and the neutral wire terminal of the power supply side terminal portion is a predetermined value or more, the opening / closing mechanism portion is driven to open the contact portion. Since the neutral line potential response means is provided, when the distribution line is erroneously connected to the power supply side terminal of the circuit breaker, a predetermined value is placed between the neutral line terminal of the power supply side terminal and the ground connection. Due to the above potential difference, the neutral wire potential response means can drive the switching mechanism part to forcibly open the contact part and interrupt the main circuit, ensuring safety in case of incorrect connection. In addition, there is an effect that it is possible to prevent erroneous connection during wiring work.
【００３８】請求項２の発明は、配電線の電圧線及び中
性線が各々接続される電圧線端子及び中性線端子を有す
る電源側端子部と負荷側端子部との間に接点部を挿入し
て主電路を形成し、接点部の閉極時に主電路に流れる漏
洩電流あるいは地絡電流のような漏電電流を検出する零
相変流器と、この零相変流器の出力に応じて接点部を開
極し主電路を遮断する開閉機構部とを備えた回路遮断器
において、外部の接地部と接続される接地接続部と、こ
の接地接続部と電源側端子部の中性線端子との電位差が
所定値以上の場合に零相変流器に模擬の漏電電流を発生
させて開閉機構部を駆動する模擬漏電電流発生手段とを
設けたので、配電線が回路遮断器の電源側端子部に誤接
続された場合に、電源側端子部の中性線端子と接地接続
部との間に所定値以上の電位差が生じ、これにより模擬
漏電電流発生手段が零相変流器に出力を生じさせ、開閉
機構部を駆動させて接点部を強制的に開極し主電路を遮
断することができ、誤接続された場合の安全性を確保す
るとともに配線作業時の誤接続の防止を図ることができ
るという効果がある。According to a second aspect of the present invention, a contact portion is provided between the power source side terminal portion and the load side terminal portion having the voltage line terminal and the neutral line terminal to which the voltage line and the neutral line of the distribution line are respectively connected. Depending on the output of the zero-phase current transformer, which is inserted to form the main circuit and detects leakage current such as leakage current or ground fault current flowing in the main circuit when the contact is closed. In a circuit breaker having an opening / closing mechanism for opening a contact part to cut off a main electric circuit, a ground connection part connected to an external ground part, and a neutral wire for this ground connection part and a power supply side terminal part. Since the zero-phase current transformer is provided with simulated leakage current generation means for driving the switching mechanism by generating a simulated leakage current when the potential difference from the terminal is equal to or greater than a predetermined value, the distribution line is the power source of the circuit breaker. If the power line side terminal is mistakenly connected, a specified value should be applied between the neutral line terminal of the power supply side terminal and the ground connection. Due to the above potential difference, the simulated leakage current generating means causes an output to the zero-phase current transformer, drives the opening / closing mechanism part, forcibly opens the contact part, and can interrupt the main electric circuit, There is an effect that it is possible to secure the safety in case of incorrect connection and to prevent the incorrect connection during wiring work.
【００３９】請求項３の発明の構成では、開閉機構部を
駆動する励磁コイルと、電源側端子部の中性線端子と接
地接続部との間の電位差が所定値以上になるとオンされ
るスイッチング素子との直列回路を電源側端子部の電圧
線端子と接地接続部との間に設けたので、配電線が回路
遮断器の電源側端子部に正常に接続された状態で中性線
が電源側端子部よりも電源側の経路で断線した場合、あ
るいは中性線電位応答手段若しくは模擬漏電電流発生手
段よりも電源側の経路で断線した場合に、主電路の電圧
線側の線路から負荷を介して接地接続部に流れる電流に
より中性線端子と接地接続部との間に電位差が生じ、ス
イッチング素子がオンとなって励磁コイルに電流が供給
され、励磁コイルが励磁されて開閉機構が駆動されるこ
とにより接点部が開極され、正常に結線された状態で中
性線が断線した場合にも接点部を開極して主電路を遮断
することができ、回路遮断器の安全性を向上させること
ができるという効果がある。According to the third aspect of the invention, the switching is turned on when the potential difference between the exciting coil for driving the opening / closing mechanism section and the neutral wire terminal of the power source side terminal section and the ground connection section exceeds a predetermined value. Since a series circuit with the element is provided between the voltage line terminal of the power supply side terminal and the ground connection part, the neutral wire is connected to the power supply side terminal of the circuit breaker while the neutral wire is the power supply. If the wire is disconnected in the path closer to the power source than the side terminal, or if the wire is disconnected in the path closer to the power source than the neutral line potential response means or simulated leakage current generating means, the load is applied from the line on the voltage line side of the main circuit. The current flowing through the ground connection causes a potential difference between the neutral wire terminal and the ground connection, the switching element turns on, the current is supplied to the exciting coil, and the exciting coil is excited to drive the switching mechanism. The contact part is Even if the neutral wire is disconnected after being poled and normally connected, the contact part can be opened and the main electric circuit can be interrupted, which has the effect of improving the safety of the circuit breaker. is there.
【図１】実施例１を示す回路構成図である。FIG. 1 is a circuit configuration diagram showing a first embodiment.
【図２】実施例２を示す回路構成図である。FIG. 2 is a circuit configuration diagram showing a second embodiment.
【図３】実施例３を示す回路構成図である。FIG. 3 is a circuit configuration diagram showing a third embodiment.
【図４】同上の要部の他の例を示す図である。FIG. 4 is a diagram showing another example of the main part of the above.
【図５】実施例４を示す回路構成図である。FIG. 5 is a circuit configuration diagram showing a fourth embodiment.
【図６】実施例５を示す回路構成図である。FIG. 6 is a circuit configuration diagram showing a fifth embodiment.
【図７】従来例を示す回路構成図である。FIG. 7 is a circuit configuration diagram showing a conventional example.
１ 電源側端子部 ２ 負荷側端子部 ３ 接点部 ４ 開閉機構部 ５ 駆動コイル ６ サーマルリレー ７ 接地接続部 １０ 中性線電位応答手段 １２ 励磁コイル ＺＤ ツェナーダイオード ＳＣＲ サイリスタ 1 Power supply side terminal section 2 Load side terminal section 3 Contact section 4 Switching mechanism section 5 Driving coil 6 Thermal relay 7 Ground connection section 10 Neutral wire potential response means 12 Excitation coil ZD Zener diode SCR thyristor
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成７年２月１３日[Submission date] February 13, 1995
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１[Name of item to be corrected] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 FIG.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 澤田 知行 大阪府門真市大字門真1048番地松下電工株 式会社内 (72)発明者 小西 洋史 大阪府門真市大字門真1048番地松下電工株 式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoyuki Sawada 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Hiroshi Konishi, 1048, Kadoma, Kadoma City, Osaka Matsushita Electric Co., Ltd.
Claims (3)
れる電圧線端子及び中性線端子を有する電源側端子部と
負荷側端子部との間に接点部を挿入して主電路を形成
し、接点部の閉極時に主電路に短絡電流あるいは過負荷
電流が流れると接点部を開極して主電路を遮断する開閉
機構部を備えた回路遮断器において、外部の接地部と接
続される接地接続部と、この接地接続部と電源側端子部
の中性線端子との電位差が所定値以上の場合に開閉機構
部を駆動させて接点部を開極させる中性線電位応答手段
とを設けたことを特徴とする回路遮断器。1. A main electric circuit with a contact portion inserted between a power supply side terminal portion and a load side terminal portion having a voltage line terminal and a neutral line terminal to which a voltage line and a neutral line of a distribution line are respectively connected. In the circuit breaker equipped with an opening and closing mechanism that opens the contacts and shuts off the main circuit when a short circuit current or overload current flows in the main circuit when the contacts are closed, Neutral line potential response that drives the switching mechanism to open the contact when the potential difference between the ground connection to be connected and the neutral line terminal of this ground connection and the power supply side terminal is equal to or greater than the specified value. A circuit breaker provided with means.
れる電圧線端子及び中性線端子を有する電源側端子部と
負荷側端子部との間に接点部を挿入して主電路を形成
し、接点部の閉極時に主電路に流れる漏洩電流あるいは
地絡電流のような漏電電流を検出する零相変流器と、こ
の零相変流器の出力に応じて接点部を開極し主電路を遮
断する開閉機構部とを備えた回路遮断器において、外部
の接地部と接続される接地接続部と、この接地接続部と
電源側端子部の中性線端子との電位差が所定値以上の場
合に零相変流器に模擬の漏電電流を発生させて開閉機構
部を駆動する模擬漏電電流発生手段とを設けたことを特
徴とする回路遮断器。2. A main electric circuit with a contact portion inserted between a power source side terminal portion and a load side terminal portion having a voltage line terminal and a neutral line terminal to which a voltage line and a neutral line of a distribution line are respectively connected. And a zero-phase current transformer that detects a leakage current such as a leakage current or a ground fault current that flows in the main circuit when the contact portion is closed, and the contact portion is opened according to the output of this zero-phase current transformer. In a circuit breaker equipped with an opening / closing mechanism section that polarizes and cuts off the main electric circuit, the potential difference between the ground connection section connected to the external ground section and the neutral wire terminal of the power supply side terminal section A circuit breaker, comprising: a simulated leakage current generating means for generating a simulated leakage current in a zero-phase current transformer to drive the switching mechanism when the value is equal to or more than a predetermined value.
源側端子部の中性線端子と接地接続部との間の電位差が
所定値以上になるとオンされるスイッチング素子との直
列回路を電源側端子部の電圧線端子と接地接続部との間
に設けたことを特徴とする請求項１又は請求項２記載の
回路遮断器。3. A power supply for a series circuit of an exciting coil for driving an opening / closing mechanism section and a switching element which is turned on when a potential difference between a neutral wire terminal of a power source side terminal section and a ground connection section exceeds a predetermined value. The circuit breaker according to claim 1 or 2, wherein the circuit breaker is provided between the voltage line terminal of the side terminal portion and the ground connection portion.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6281026A JP2992449B2 (en) | 1994-11-15 | 1994-11-15 | Circuit breaker |
| GB9509342A GB2295284B (en) | 1994-11-15 | 1995-05-09 | Circuit breaker |
| MYPI95001286A MY115956A (en) | 1994-11-15 | 1995-05-16 | Circuit breaker |
| CN95105294A CN1046055C (en) | 1994-11-15 | 1995-05-24 | Circuit breaker |
| HK98112991A HK1012129A1 (en) | 1994-11-15 | 1998-12-09 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6281026A JP2992449B2 (en) | 1994-11-15 | 1994-11-15 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08138523A true JPH08138523A (en) | 1996-05-31 |
| JP2992449B2 JP2992449B2 (en) | 1999-12-20 |
Family
ID=17633259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6281026A Expired - Lifetime JP2992449B2 (en) | 1994-11-15 | 1994-11-15 | Circuit breaker |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2992449B2 (en) |
| CN (1) | CN1046055C (en) |
| GB (1) | GB2295284B (en) |
| HK (1) | HK1012129A1 (en) |
| MY (1) | MY115956A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009238574A (en) * | 2008-03-27 | 2009-10-15 | Tempearl Ind Co Ltd | Circuit breaker |
| JP2009245792A (en) * | 2008-03-31 | 2009-10-22 | Panasonic Electric Works Co Ltd | Wiring apparatus |
| JP2009245791A (en) * | 2008-03-31 | 2009-10-22 | Panasonic Electric Works Co Ltd | Wiring instrument |
| JP2010061928A (en) * | 2008-09-03 | 2010-03-18 | Tempearl Ind Co Ltd | Circuit breaker unit |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2311177B (en) * | 1996-03-13 | 2000-08-02 | Crabtree Electrical Ind Ltd | Residual current devices |
| GB2412511B (en) * | 2001-06-08 | 2005-11-30 | Eaton Electric Ltd | Measuring devices |
| JP4931754B2 (en) * | 2007-10-03 | 2012-05-16 | 三菱電機株式会社 | Earth leakage breaker |
| ES2545134T3 (en) * | 2010-05-07 | 2015-09-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Lighting medium to replace a fluorescent tube |
| CN102882227B (en) * | 2012-09-14 | 2015-03-18 | 江苏兆伏新能源有限公司 | High-power photovoltaic grid-connected inverter |
| CN112437966A (en) * | 2018-07-31 | 2021-03-02 | 松下知识产权经营株式会社 | Control system and circuit breaking system |
| CN111509710B (en) * | 2020-04-29 | 2022-01-18 | 广东电网有限责任公司韶关供电局 | TN-C platform area electric leakage identification method, system, equipment and storage medium |
| EP4084251A4 (en) * | 2020-11-13 | 2023-08-30 | Huawei Digital Power Technologies Co., Ltd. | Power source reverse connection prevention circuit, power distribution apparatus, and power supply and distribution system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4068276A (en) * | 1976-07-14 | 1978-01-10 | Interelectronics Corporation | Protective system for electrical appliances |
| GB2135542B (en) * | 1983-02-19 | 1986-11-05 | Ashley Accessories Ltd | Earth leakage circuit breaker |
| GB8331724D0 (en) * | 1983-11-28 | 1984-01-04 | B & R Electrical Prod Ltd | Reverse polarity auto-tripping system |
| GB8332815D0 (en) * | 1983-12-08 | 1984-01-18 | Ashley Accessories Ltd | Electrical accessories |
| US4598331A (en) * | 1984-07-30 | 1986-07-01 | Technology Research Corporation | Ground fault current interrupter circuit with open neutral and ground lead protection |
| GB8710521D0 (en) * | 1987-05-02 | 1987-06-03 | Ashley Accessories Ltd | Residual current circuit breaker |
| IE880341L (en) * | 1988-02-08 | 1989-08-08 | Patrick Ward | Ground fault current interrupter circuit |
| GB2244398B (en) * | 1990-05-25 | 1994-03-16 | Mk Electric Ltd | Electrical protection devices |
| IE930319A1 (en) * | 1993-04-27 | 1994-11-02 | Shakira Ltd | Circuit for detecting a faulty mains neutral |
-
1994
- 1994-11-15 JP JP6281026A patent/JP2992449B2/en not_active Expired - Lifetime
-
1995
- 1995-05-09 GB GB9509342A patent/GB2295284B/en not_active Expired - Fee Related
- 1995-05-16 MY MYPI95001286A patent/MY115956A/en unknown
- 1995-05-24 CN CN95105294A patent/CN1046055C/en not_active Expired - Fee Related
-
1998
- 1998-12-09 HK HK98112991A patent/HK1012129A1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009238574A (en) * | 2008-03-27 | 2009-10-15 | Tempearl Ind Co Ltd | Circuit breaker |
| JP2009245792A (en) * | 2008-03-31 | 2009-10-22 | Panasonic Electric Works Co Ltd | Wiring apparatus |
| JP2009245791A (en) * | 2008-03-31 | 2009-10-22 | Panasonic Electric Works Co Ltd | Wiring instrument |
| JP2010061928A (en) * | 2008-09-03 | 2010-03-18 | Tempearl Ind Co Ltd | Circuit breaker unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1046055C (en) | 1999-10-27 |
| JP2992449B2 (en) | 1999-12-20 |
| CN1118108A (en) | 1996-03-06 |
| GB9509342D0 (en) | 1995-06-28 |
| GB2295284B (en) | 1999-02-03 |
| MY115956A (en) | 2003-10-31 |
| HK1012129A1 (en) | 1999-07-23 |
| GB2295284A (en) | 1996-05-22 |
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