JPH0514500B2 - - Google Patents
Info
- Publication number
- JPH0514500B2 JPH0514500B2 JP58226546A JP22654683A JPH0514500B2 JP H0514500 B2 JPH0514500 B2 JP H0514500B2 JP 58226546 A JP58226546 A JP 58226546A JP 22654683 A JP22654683 A JP 22654683A JP H0514500 B2 JPH0514500 B2 JP H0514500B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- earth leakage
- full
- circuit
- wave rectifier
- 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.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は単相３線における中性線の断線検知機
能を備えた漏電しや断器に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an earth leakage or disconnection device having a function of detecting disconnection of a neutral wire in a single-phase three-wire system.
（従来の技術）
単相３線線路における中性線の断線検知機能を
有するしや断装置として、従来、たとえば特開昭
54−12444号公報に示すものが知られている。(Prior art) Conventionally, for example, Japanese Patent Application Laid-Open No.
The one shown in Japanese Patent No. 54-12444 is known.
（発明が解決しようとする問題点）
上記特開昭54−12444号公報に示されるものは、
２個のダイオードの極性の同じ端子を共通に接続
し、両ダイオードの他方の端子をそれぞれ単相３
線の両電圧線に接続し、この２個のダイオードの
共通接続点と単相３線の中性線との間の電圧を検
出する検出回路を設け、この検出回路により、中
性線断線に伴う過電圧を検知して、しや断機構を
しや断動作させるものである。そうして、漏電し
や断器に上記中性線の断線検知機能を付与させ、
このしや断器を中性線断線に際しても作動させる
ことが考えられるが、その場合、従来の上記した
中性線断線しや断機能を付与するしや断装置の構
成をそのまま漏電しや断器に付加することにな
り、構成が複雑化する問題があつた。(Problems to be solved by the invention) What is shown in the above-mentioned Japanese Patent Application Laid-Open No. 54-12444 is as follows:
Connect the terminals of the two diodes with the same polarity in common, and connect the other terminals of both diodes to each single-phase 3
A detection circuit is connected to both voltage lines of the line and detects the voltage between the common connection point of these two diodes and the single-phase three-wire neutral line, and this detection circuit prevents the neutral line from being disconnected. It detects the accompanying overvoltage and activates the shearing mechanism. Then, the earth leakage and disconnection switch is given the above-mentioned neutral wire disconnection detection function,
It is conceivable to operate this shield disconnector even when the neutral wire is disconnected, but in that case, the configuration of the conventional shield disconnector that provides the above-mentioned neutral wire disconnection function can be used as is. There was a problem in that the configuration would become complicated as it would be added to the container.
本発明は上述の事情を考慮してなされたもの
で、部品点数が少なくてすみ、構造が簡単で安価
にできる中性線断線機能を有する漏電しや断器を
提供することを目的とする。 The present invention has been made in consideration of the above-mentioned circumstances, and it is an object of the present invention to provide an earth leakage disconnector having a neutral wire disconnection function, which requires a small number of parts, has a simple structure, and is inexpensive.
［発明の構成］
（問題点を解決するための手段）
本発明は単相３線線路の両電圧線に接続された
全波整流回路と、漏電検知手段と、上記全波整流
回路の出力端間に設けられたスイツチ素子を有し
上記漏電検知手段の検知出力に応動する漏電検出
回路と上記漏電検出回路に応動して線路を開放す
るしや断機構と、上記全波整流回路の出力側およ
び上記単相３線線路のうち中性線間の電圧を検知
しこの検知電圧が所定値を超えたとき上記しや断
機構を作動させる電圧検出回路とを具備したこと
を特徴とする。[Structure of the Invention] (Means for Solving the Problems) The present invention provides a full-wave rectifier circuit connected to both voltage lines of a single-phase three-wire line, an earth leakage detection means, and an output terminal of the full-wave rectifier circuit. an earth leakage detection circuit that has a switch element provided between them and responds to the detection output of the earth leakage detection means; a shoring mechanism that opens the line in response to the earth leakage detection circuit; and an output side of the full-wave rectifier circuit. and a voltage detection circuit that detects the voltage between the neutral lines of the single-phase three-wire line and activates the sheathing mechanism when the detected voltage exceeds a predetermined value.
（作用）
本発明の漏電しや断器は全波整流回路の出力側
および単相３線のうちの中性線間の電圧を検知し
この検知電圧が所定値を超えたときしや断機構を
作動させるので、全波整流回路を設けたことによ
つて、線路間の電圧の差を検知して、いずれかの
線路間の電圧が所定値を超えたときしや断機構を
開放できる。(Function) The earth leakage and disconnection device of the present invention detects the voltage between the output side of the full-wave rectifier circuit and the neutral line of the single-phase three wires, and when this detected voltage exceeds a predetermined value, the current leakage and disconnection mechanism Since the full-wave rectifier circuit is provided, it is possible to detect the voltage difference between the lines and open the shrinking mechanism when the voltage between any of the lines exceeds a predetermined value.
（実施例）
本発明の一実施例を図面を参照して説明する。
１は単相３線線路２の両電圧線３，４に接続され
た全波整流回路、５は漏電検出回路である。この
漏電検出回路５は全波整流回路１の出力端間に設
けられたスイツチ素子６を有し漏電を検知する漏
電検知手段としての零相変流器１５の検知出力に
応動するように形成されている。(Example) An example of the present invention will be described with reference to the drawings.
1 is a full-wave rectifier circuit connected to both voltage lines 3 and 4 of a single-phase three-wire line 2, and 5 is a leakage detection circuit. This earth leakage detection circuit 5 has a switch element 6 provided between the output terminals of the full-wave rectifier circuit 1, and is formed to respond to the detection output of a zero-phase current transformer 15 as an earth leakage detection means for detecting earth leakage. ing.
７は漏電検出回路５に応動して線路２を開放す
るしや断機構で、電圧線３と全波整流回路１の入
口側の一端との間に介挿された漏電引外しコイル
８と、このコイル８に応動する開閉接点９とを有
している。一方、１０は電圧検出回路で、この電
圧検出回路１０は全波整流回路１の出力側および
上記単相３線線路２のうちの中性線１１間の電圧
を検知しこの検知電圧が所定値を超えたとき、上
記しや断機構７を作動させる機能を有している。
本実施例では全波整流回路１の出力側の一端と、
中性線１１との間に介挿されている。そして、電
圧検出回路１０はスイツチ素子１２と所定値を超
えたあるいは低下した線路間の電圧によつて作動
して上記スイツチ素子１２をオン制御するトリガ
ー回路１３とを有している。上記実施例について
さらに詳述すると、漏電検出回路５は、スイツチ
素子６に並列に接続されたこのスイツチ素子６の
制御回路１４および単相３銭線路２の漏電に伴う
不平衡電流を検知して、この検知出力を制御回路
１４に供給する漏電検知手段としての零相変流器
１５を有している。なお、電圧検出回路１０の全
波整流回路１の一端と、中性線１１と結ぶ線路１
６の一部を上記零相変流器１５の１次側に設けて
いる。また１７は電源側端子、１８は負荷端子で
ある。 Reference numeral 7 denotes a shingle disconnection mechanism that opens the line 2 in response to the earth leakage detection circuit 5, and includes an earth leakage tripping coil 8 inserted between the voltage line 3 and one end on the inlet side of the full-wave rectifier circuit 1; It has an opening/closing contact 9 that responds to this coil 8. On the other hand, 10 is a voltage detection circuit, which detects the voltage between the output side of the full-wave rectifier circuit 1 and the neutral wire 11 of the single-phase three-wire line 2, and this detected voltage is a predetermined value. It has a function of activating the shear cutting mechanism 7 when the temperature exceeds the limit.
In this embodiment, one end of the output side of the full-wave rectifier circuit 1 and
It is inserted between the neutral wire 11 and the neutral wire 11. The voltage detection circuit 10 includes a switch element 12 and a trigger circuit 13 which is activated by the line voltage exceeding or decreasing to a predetermined value to turn on the switch element 12. To explain the above embodiment in more detail, the earth leakage detection circuit 5 detects an unbalanced current due to earth leakage in the control circuit 14 of the switch element 6 and the single-phase 3-sen line 2 connected in parallel to the switch element 6. , a zero-phase current transformer 15 is provided as an earth leakage detection means for supplying this detection output to the control circuit 14. Note that a line 1 connecting one end of the full-wave rectifier circuit 1 of the voltage detection circuit 10 and the neutral wire 11
6 is provided on the primary side of the zero-phase current transformer 15. Further, 17 is a power supply side terminal, and 18 is a load terminal.
つぎに、本実施例の作用を説明する。漏電が発
生するとこれに伴う不平衡電流を漏電検知手段と
しての零相変流器１５で検知して、この検知出力
を制御回路１４に供給する。これによつて、制御
回路１４はスイツチ素子６のゲートにゲート信号
を供給してこれをオンする。これによつて漏電引
外しコイル８は付勢され、しや断機構７の開閉接
点９を開放する。また、中性線１１と両電圧線
２，３との間に負荷側端子１８を介して２つの負
荷回路（図示しない。）が接続されており、この
状態で中性線１１が断線したとすると、両負荷回
路に作用する電圧は、両者のインピーダンスに比
例した電圧が発生し、いずれかの負荷回路に対し
てたとえば規定の100Vを超える過電圧が付与さ
れ、この電圧が電圧検出回路１０によつて検出さ
れ、スイツチ素子１２がオンする。これによつて
零相変流器１５に設けられた電圧検出回路１０の
一端と中性線とを結ぶ線路１６に検出電流が流
れ、これを漏電検出回路５が疑似漏電として検知
して、上記したように、しや断機構７の開閉接点
９を開放する。そうして、電圧検出回路１０は全
波整流回路１の出力側に設けているので、全波整
流回路１０をいずれの線路間に所定値を超える電
圧が付与されてもこれを検出してしや断機構７を
作動させるオア回路として利用することができ
る。また、全波整流回路１を漏電検出回路５およ
び中性線断線検出用の電圧検出回路１０に共通に
使用しているため、部品点数が少なくてすみ構成
が簡単になるものである。なお、電圧検出回路１
０の検出信号を漏電検出回路５に加えるようにし
たが、別個の回路に加えてしや断機構７の動作を
させるようにしてもよい。 Next, the operation of this embodiment will be explained. When a current leakage occurs, the resulting unbalanced current is detected by a zero-phase current transformer 15 serving as a current leakage detection means, and the detected output is supplied to the control circuit 14 . As a result, the control circuit 14 supplies a gate signal to the gate of the switch element 6 to turn it on. As a result, the earth leakage tripping coil 8 is energized and opens the opening/closing contact 9 of the sheath breaker mechanism 7. In addition, two load circuits (not shown) are connected between the neutral wire 11 and both voltage wires 2 and 3 via the load side terminal 18, and in this state, if the neutral wire 11 is disconnected, Then, the voltage acting on both load circuits is proportional to the impedance of both, and an overvoltage exceeding the specified 100V is applied to either load circuit, and this voltage is detected by the voltage detection circuit 10. The switch element 12 is turned on. As a result, a detection current flows through the line 16 that connects one end of the voltage detection circuit 10 provided in the zero-phase current transformer 15 and the neutral line, and the earth leakage detection circuit 5 detects this as a pseudo earth leakage, causing the above-mentioned As described above, the opening/closing contact 9 of the shearing mechanism 7 is opened. Since the voltage detection circuit 10 is provided on the output side of the full-wave rectifier circuit 1, even if a voltage exceeding a predetermined value is applied between any line of the full-wave rectifier circuit 10, it can be detected. It can be used as an OR circuit for operating the disconnection mechanism 7. Further, since the full-wave rectifier circuit 1 is commonly used for the earth leakage detection circuit 5 and the voltage detection circuit 10 for detecting disconnection of the neutral wire, the number of parts is reduced and the configuration is simplified. Note that voltage detection circuit 1
Although the detection signal of 0 is applied to the earth leakage detection circuit 5, the shearing mechanism 7 may be operated in addition to a separate circuit.
［発明の効果］
以上詳述したように、本発明は全波整流回路を
漏電検出回路および中性線断線検知用の電圧検出
回路に共通して使用できるため、部品点数が少な
くてすみ、構造が簡単で安価にできる。また、全
波整流回路を単相３線線路の両電圧線間に接続
し、電圧検出回路を全波整流回路の出力側および
単相３線線路のうちの中性線間の電圧を検知する
ように設けているので、いずれの線路間に所定値
を超える電圧が付与されてもこれを検出してしや
断機構を作動させるオア回路として利用すること
ができる。[Effects of the Invention] As detailed above, the present invention allows the full-wave rectifier circuit to be used in common with the earth leakage detection circuit and the voltage detection circuit for detecting disconnection of the neutral wire, so the number of parts can be reduced and the structure can be improved. can be done easily and cheaply. In addition, a full-wave rectifier circuit is connected between both voltage lines of the single-phase 3-wire line, and a voltage detection circuit is used to detect the voltage between the output side of the full-wave rectifier circuit and the neutral line of the single-phase 3-wire line. Therefore, even if a voltage exceeding a predetermined value is applied between any of the lines, this can be detected and used as an OR circuit to operate the shearing mechanism.
図面は本発明の一実施例を示す回路図である。
１……全波整流回路、１５……漏電検知手段と
しての零相変流器、５……漏電検出回路、７……
しや断機構、６……スイツチ素子、２……単相３
線線路、１０……電圧検出回路。
The drawing is a circuit diagram showing an embodiment of the present invention. 1...Full-wave rectifier circuit, 15...Zero-phase current transformer as earth leakage detection means, 5...Earth leakage detection circuit, 7...
Shrinking mechanism, 6...Switch element, 2...Single phase 3
Line line, 10...voltage detection circuit.
Claims (1)
流回路と； 漏電検知手段と； 上記全波整流回路の出力端間に設けられたスイ
ツチ素子を有し上記漏電検知手段の検知出力に応
動する漏電検出回路と； 上記漏電検出回路に応動して線路を開放するし
や断機構と； 上記全波整流回路の出力側および上記単相３線
線路のうちの中性線間の電圧を検知しこの検知電
圧が所定値を超えたとき上記しや断機構を作動さ
せる電圧検出回路と； を具備したことを特徴とする漏電しや断器。[Scope of Claims] 1. A full-wave rectifier circuit connected to both voltage lines of a single-phase three-wire line; Earth leakage detection means; A switch element provided between the output terminals of the full-wave rectifier circuit; an earth leakage detection circuit that responds to the detection output of the earth leakage detection means; a shingle breaking mechanism that opens the line in response to the earth leakage detection circuit; an output side of the full-wave rectifier circuit and one of the single-phase three-wire lines; A voltage detection circuit that detects a voltage between a neutral wire and operates the above-mentioned shielding mechanism when the detected voltage exceeds a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58226546A JPS60121915A (en) | 1983-11-30 | 1983-11-30 | Leakage breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58226546A JPS60121915A (en) | 1983-11-30 | 1983-11-30 | Leakage breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60121915A JPS60121915A (en) | 1985-06-29 |
| JPH0514500B2 true JPH0514500B2 (en) | 1993-02-25 |
Family
ID=16846841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58226546A Granted JPS60121915A (en) | 1983-11-30 | 1983-11-30 | Leakage breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60121915A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3531023A1 (en) * | 1985-08-30 | 1987-03-05 | Bbc Brown Boveri & Cie | CIRCUIT ARRANGEMENT FOR DETECTING AN ERROR OR DIFFERENTIAL CURRENTS |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54106838A (en) * | 1978-02-08 | 1979-08-22 | Fuji Electric Co Ltd | Detector for breaking of neutral wire |
-
1983
- 1983-11-30 JP JP58226546A patent/JPS60121915A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60121915A (en) | 1985-06-29 |
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