JPH0828936B2 - Phase breaker - Google Patents

Phase breaker

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Publication number
JPH0828936B2
JPH0828936B2 JP62242065A JP24206587A JPH0828936B2 JP H0828936 B2 JPH0828936 B2 JP H0828936B2 JP 62242065 A JP62242065 A JP 62242065A JP 24206587 A JP24206587 A JP 24206587A JP H0828936 B2 JPH0828936 B2 JP H0828936B2
Authority
JP
Japan
Prior art keywords
phase
open
circuit
main contact
detection
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
Application number
JP62242065A
Other languages
Japanese (ja)
Other versions
JPS6485520A (en
Inventor
義久 石神
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP62242065A priority Critical patent/JPH0828936B2/en
Publication of JPS6485520A publication Critical patent/JPS6485520A/en
Publication of JPH0828936B2 publication Critical patent/JPH0828936B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 [技術分野] 本発明は、単相3線式電源線の欠相を検出して電路を
遮断する欠相遮断器に関するものである。
Description: TECHNICAL FIELD The present invention relates to an open-phase circuit breaker that detects an open phase of a single-phase three-wire power supply line and disconnects an electric circuit.

[背景技術] 従来、単相3線式電源線の欠相を検出して電路を遮断
するこの種の欠相遮断器として、第3図および第4図に
示すようなものがあり、各電路(A,N,B相)に挿入され
る主接点S1と、主接点S1に連動して駆動され電源および
負荷が逆接続されたときに主接点S1の引き外しコイルに
連続通電されるのを防止する常閉型の補助接点S2′を具
備し、欠相検出制御手段にて検出線を介して入力される
電路の電圧に基いて欠相を検出して主接点S1および補助
接点S2′を開放するようになっていた。しかしながら、
第3図従来例にあっては、各相の欠相を検出するための
検出線lA、lN、lBが総て欠相遮断器A内の内部配線によ
って主接点S1に対して負荷側に接続され欠相による異常
電圧を検出するようになっていたので、検出線lA、lN
lBよりも電源側の欠相しか検出できず、遮断器のN相の
緩みによる欠相が検出できないという問題があった。
BACKGROUND ART Conventionally, as this type of open-phase circuit breaker for detecting an open phase of a single-phase three-wire type power supply line to cut off an electric path, there is one as shown in FIG. 3 and FIG. When the main contact S 1 inserted in (A, N, B phases) and the main contact S 1 are driven and the power supply and load are reversely connected, the trip coil of the main contact S 1 is continuously energized. A normally closed auxiliary contact S 2 ′ for preventing the open phase is provided, and the open phase detection control means detects the open phase based on the voltage of the electric path input through the detection line to detect the main contact S 1 and It was designed to open the auxiliary contact S 2 ′. However,
FIG. 3 In the conventional example, all the detection lines l A , l N and l B for detecting the open phase of each phase are connected to the main contact S 1 by internal wiring inside the open phase circuit breaker A. Since it was connected to the load side to detect abnormal voltage due to open phase, the detection lines l A , l N ,
There is a problem that only the open phase on the power supply side can be detected with respect to 1 B, and the open phase due to loosening of the N phase of the circuit breaker cannot be detected.

一方、第4図従来例のように、N相に接続される検出
線lNをリード線にて欠相遮断器A外に引き出し、外部配
線を行うようにした場合には上記問題点を解決すること
ができる。しかしながら、このような従来例にあって
は、負荷側端子に電源を接続するとともに電源側端子に
負荷を接続した逆接続状態の場合(但し、N相の検出線
lNを負荷接続側に接続)において、電路遮断用の主接点
S1が開路しても外部配線されているN相の検出線lNを通
って電流が流れるため、主接点S1が開放しても電路の遮
断ができなくなってしまうという問題があった。なお、
逆接続されても電路の遮断が正常に行なわれるようにす
るにはN相の検出線lNに新たな補助接点を追加する必要
があり、構成が複雑になってコストが高くなるという問
題があった。
On the other hand, as in the conventional example shown in FIG. 4, when the detection line l N connected to the N phase is drawn out of the open circuit breaker A by the lead wire and external wiring is performed, the above problem is solved. can do. However, in such a conventional example, in the case of the reverse connection state in which the power source is connected to the load side terminal and the load is connected to the power source side terminal (however, the N-phase detection line is
l N is connected to the load connection side), the main contact for circuit break
Even if S 1 opens, a current flows through the externally wired N-phase detection line l N , so that there is a problem that the circuit cannot be interrupted even if the main contact S 1 opens. In addition,
In order to normally cut off the electric path even if it is reversely connected, it is necessary to add a new auxiliary contact to the N-phase detection line l N , which causes a problem that the configuration becomes complicated and the cost becomes high. there were.

[発明の目的] 本発明は上記の点に鑑みて為されたものであり、その
目的とするところは、接点数を増すことなく逆接続を可
能にすることができ、構成が簡単でコストが安い欠相遮
断器を提供することにある。
[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to enable reverse connection without increasing the number of contacts, and to simplify the configuration and reduce the cost. To provide a cheap phase breaker.

[発明の開示] (構 成) 本発明は、単相3線式電源線の異常電圧にて欠相を検
出し、欠相検出信号にてスイッチ手段をオンして主接点
の引き外しコイルを励磁し、引き外しコイルの励磁によ
って電路に挿入された主接点を開放せしめ、欠相検出手
段からN相の電路に接続される検出線を外部配線するよ
うにした欠相遮断器において、欠相検出信号をパルス信
号とするワンショット回路を用いて欠相検出手段を形成
し、欠相検出時に引き外しコイルをパルス的に励磁する
とともに、欠相検出手段からN相に接続される検出線に
主接点に連動する常閉型の補助接点を挿入することによ
り、接点数を増すことなく逆接続を可能にすることがで
き、構成が簡単でコストが安い欠相遮断器を提供するも
のである。
DISCLOSURE OF THE INVENTION (Structure) The present invention detects an open phase by an abnormal voltage of a single-phase three-wire power supply line and turns on a switch means by an open phase detection signal to turn off a trip coil of a main contact. In the open-phase circuit breaker in which the main contact inserted in the electric path is opened by exciting and exciting the trip coil, and the detection line connected to the N-phase electric path from the open-phase detecting means is externally wired, The one-shot circuit that uses the detection signal as a pulse signal is used to form the open-phase detecting means, and when the open-phase is detected, the trip coil is pulse-excited, and the open-phase detecting means is connected to the N-phase to the detection line By inserting a normally-closed auxiliary contact linked to the main contact, it is possible to reverse connection without increasing the number of contacts, and to provide a phase-break circuit breaker with a simple structure and low cost. .

(実施例) 第1図は本発明一実施例を示すもので、単相3線式電
源線の異常電圧にて欠相を検出し、欠相検出信号にてサ
イリスタSCRよりなるスイッチ手段をオンして主接点S1
の引き外しコイルLを励磁し、引き外しコイルLの励磁
によって電路に挿入された主接点S1を開放せしめ、欠相
検出手段からN相の電路に接続される検出線lNをリード
線にて外部配線するようにした第4図従来例と同様の欠
相遮断器において、欠相検出信号をパルス信号とするワ
ンショット回路MM1を用いて欠相検出手段を形成し、欠
相検出時に引き外しコイルLをパルス的に励磁するとと
もに、N相に接続される検出線lNに主接点S1に連動する
常閉型の補助接点S2を挿入したものである。実施例にあ
っては、欠相検出手段はIC化(一点鎖線で囲んだ部分)
されており、検出線lNを介して検出された電圧V1と基準
電圧Vs1とを比較して欠相を検出するコンパレータCP
1と、コンパレータCP1出力を波形整形する波形整形回路
WSと、ノイズによる誤動作を防止するために欠相検出信
号の出力を適宜時間だけ遅延させる遅延回路TDと、遅延
して出力される欠相検出信号をパルス化するワンショッ
ト回路MM1とで形成されている。なお、IC内には、ワン
ショット回路MM1から出力されるパルス信号よりなる欠
相検出信号にてサイリスタSCRをパルス的にトリガする
出力回路OTと、定電流回路SCと、ダイオードブリッジDB
にて整流された直流電源を安定化して各部に回路電源Vc
cを供給する定電圧回路SVと、漏電検出回路とが設けら
れており、漏電検出回路は、零相変流器ZCT出力を増幅
するアンプAPと、上記アンプAP出力と基準電圧Vs2とを
比較して漏電を検出するコンパレータCP2と、ワンショ
ット回路MM2とで構成されている。
(Embodiment) FIG. 1 shows an embodiment of the present invention, in which an open phase is detected by an abnormal voltage of a single-phase three-wire power supply line, and a switch means composed of a thyristor SCR is turned on by an open phase detection signal. Then main contact S 1
Exciting the trip coil L, the main contact S 1 inserted in the electric path is opened by exciting the trip coil L, and the detection line l N connected from the open phase detecting means to the N-phase electric path is used as a lead wire. In the same open-phase circuit breaker as in the conventional example shown in FIG. 4, the open-phase detection means is formed by using the one-shot circuit MM 1 that uses the open-phase detection signal as a pulse signal. The trip coil L is excited in a pulsed manner, and a normally closed auxiliary contact S 2 interlocking with the main contact S 1 is inserted in the detection line l N connected to the N phase. In the embodiment, the open-phase detecting means is an IC (the part surrounded by the one-dot chain line)
The comparator CP detects the open phase by comparing the voltage V 1 detected via the detection line l N with the reference voltage Vs 1.
1 and a waveform shaping circuit that shapes the output of comparator CP 1
Formed by WS, a delay circuit TD that delays the output of the open phase detection signal by an appropriate amount of time to prevent malfunction due to noise, and a one-shot circuit MM 1 that pulse-processes the delayed open phase detection signal. Has been done. In addition, in the IC, an output circuit OT that pulse-wise triggers the thyristor SCR by the open-phase detection signal composed of the pulse signal output from the one-shot circuit MM 1 , a constant current circuit SC, a diode bridge DB
Stabilizes the DC power source rectified by
A constant voltage circuit SV that supplies c and a leakage detection circuit are provided.The leakage detection circuit includes an amplifier AP that amplifies the zero-phase current transformer ZCT output, the amplifier AP output and the reference voltage Vs 2 . It is composed of a comparator CP 2 for comparing and detecting leakage, and a one-shot circuit MM 2 .

以下、実施例の動作について説明する。いま、欠相遮
断器Aに電源および負荷が正常に接続されている場合に
おいて、N相の検出線lNを介して異常電圧検出用の端子
に印加される電圧V1は第2図(a)に示すようにな
り、通常、振幅の揃った交流電源の整流電圧が抵抗分割
されて入力されている。ここに、t0時点でN相の電源線
が断線して欠相が生じると、A相、B相の負荷状態によ
って電圧V1は交互に大小となる整流電圧になり、この電
圧V1の振幅が基準電圧Vs1以上になる期間に端子に接
続されているコンデンサC1を放電させる。第2図(b)
は端子の電圧V2を示しており、放電期間が終了すると
直ちに充電期間となる。この端子の電圧V2が波形整形
回路WSのスレッショルド電圧Vth1以下になると、第2図
(c)に示すように端子に接続されている遅延回路TD
のコンデンサC2を充電し始める。次に、遅延時間Td(実
施例では300ms)後に端子の電圧V3がスレッショルド
電圧Vth2以上になると、第2図(d)に示すような欠相
検出信号Voが出力される。この欠相検出信号VoがHレベ
ルになると、ワンショット回路MM1がトリガされてパル
ス信号よりなる欠相検出信号Vo′が出力される。この欠
相検出信号Vo′が出力回路OTに入力されると、サイリス
タSCRがトリガされて一定時間オンし、引き外しコイル
Lをパルス的に励磁して主接点S1および補助接点S2のト
リップを解除してオフさせ、単相3線式電路を遮断す
る。
The operation of the embodiment will be described below. Now, when the power supply and the load are normally connected to the open-phase circuit breaker A, the voltage V 1 applied to the abnormal voltage detection terminal via the N-phase detection line l N is as shown in FIG. ), The rectified voltage of the AC power supply having a uniform amplitude is normally divided by resistance and input. Here, when the open-phase occurs disconnected the power supply line of the N phase t 0 time, A-phase, voltages V 1 by the load state of the B-phase becomes a rectified voltage to be large and small alternately the voltages V 1 The capacitor C 1 connected to the terminal is discharged during the period when the amplitude becomes the reference voltage Vs 1 or higher. Fig. 2 (b)
Indicates the voltage V 2 of the terminal, and immediately after the discharging period ends, the charging period starts. When the voltage V 2 at this terminal becomes equal to or lower than the threshold voltage Vth 1 of the waveform shaping circuit WS, the delay circuit TD connected to the terminal as shown in FIG. 2 (c).
Start charging the capacitor C 2 of. Next, when the voltage V 3 at the terminal becomes equal to or higher than the threshold voltage Vth 2 after the delay time Td (300 ms in the embodiment), the open phase detection signal Vo as shown in FIG. 2D is output. When the open phase detection signal Vo becomes H level, the one-shot circuit MM 1 is triggered and the open phase detection signal Vo 'consisting of a pulse signal is output. When the open-phase detection signal Vo 'is input to the output circuit OT, a certain time and on the thyristor SCR is triggered, pulsed energized to trip the main contact S 1 and auxiliary contact S 2 a tripping coil L Is released and turned off, and the single-phase three-wire type electric circuit is cut off.

なお、電圧V1に基準電圧Vs1以上の単発ノイズNが重
畳された場合には、およそTn(Tn<Td)後に元に復帰
し、誤動作が防止されるようになっている。また、異常
電圧検出部は、端子に抵抗Rxが接続されているときの
み回路電流が流れて動作可能になるようにしている。
It should be noted that, when the single noise N equal to or higher than the reference voltage Vs 1 is superimposed on the voltage V 1 , the voltage is restored to the original value after about Tn (Tn <Td), and the malfunction is prevented. Further, the abnormal voltage detector is designed to be operable by the circuit current flowing only when the resistor Rx is connected to the terminal.

次に、欠相遮断器Aに電源および負荷を逆接続した場
合において、欠相検出時にN相の検出線lNに挿入されて
いる常閉型の補助接点S2がオフされるので、第4図従来
例のように、検出線lNにより回り込みにより電路遮断機
能が損なわれることがない。また、欠相検出手段にワン
ショト回路MM1を設けて欠相検出信号Vo′をパルス信号
として引き外しコイルLへの連続通電を防止しており、
従来例の補助接点S2′を省略できるので、N相の検出線
lNに挿入される補助接点S2を設けたにも拘わらず接点数
を増やす必要がなく、従来例と同様の遮断機構を流用す
ることにより、構成が簡単でコストの安い欠相遮断器A
を実現できることになる。
Next, when the power source and the load are reversely connected to the open-phase circuit breaker A, the normally closed auxiliary contact S 2 inserted in the N-phase detection line l N is turned off when the open phase is detected. Unlike the conventional example in FIG. 4, the detection line l N does not impair the function of interrupting the electric circuit due to sneaking in. Further, a one- shot circuit MM 1 is provided in the open-phase detecting means to trip the open-phase detection signal Vo ′ as a pulse signal to prevent continuous energization of the coil L.
Since the auxiliary contact S 2 ′ of the conventional example can be omitted, the N-phase detection line
It is not necessary to increase the number of contacts in spite of providing the auxiliary contact S 2 to be inserted in l N, and by utilizing the same interrupting mechanism as in the conventional example, the open-phase circuit breaker A with a simple structure and low cost
Will be realized.

[発明の効果] 本発明は上述のように、単相3線式電源線の異常電圧
にて欠相を検出し、欠相検出信号にてスイッチ手段をオ
ンして主接点の引き外しコイルを励磁し、引き外しコイ
ルの励磁により電路に挿入された主接点を開放せしめ、
欠相検出手段からN相の電路に接続される検出線を外部
配線するようにした欠相遮断器において、欠相検出信号
をパルス信号とするワンショット回路を用いて欠相検出
手段を形成し、欠相検出時に引き外しコイルをパルス的
に励磁するとともに、欠相検出手段からN相に接続され
る検出線に主接点に連動する常閉型の補助接点を挿入し
たものであり、接点数を増すことなく逆接続を可能にす
ることができ、構成が簡単でコストが安い欠相遮断器を
提供できるという効果がある。
[Effects of the Invention] As described above, the present invention detects the open phase by the abnormal voltage of the single-phase 3-wire power supply line and turns on the switch means by the open phase detection signal to turn off the trip coil of the main contact. Energize and open the main contact inserted in the circuit by exciting the trip coil,
In the open-phase circuit breaker in which the detection line connected to the N-phase electric circuit from the open-phase detection means is externally wired, the open-phase detection means is formed using a one-shot circuit that uses the open-phase detection signal as a pulse signal. , The trip coil is excited in a pulsed manner when the open phase is detected, and a normally closed auxiliary contact interlocking with the main contact is inserted in the detection line connected from the open phase detection means to the N phase. It is possible to provide a phase-break circuit breaker that has a simple structure and a low cost because reverse connection can be made possible without increasing the number.

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

第1図は本発明一実施例の回路図、第2図は同上の動作
説明図、第3図および第4図は従来例の概略構成図であ
る。 Aは欠相遮断器、S1は主接点、S2は補助接点、lNは検出
線、MM1はワンショット回路である。
FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is an operation explanatory diagram of the above, and FIGS. 3 and 4 are schematic configuration diagrams of a conventional example. A is open phase breaker, S 1 is the main contact, S 2 auxiliary contact, l N detection line, MM 1 is a one-shot circuit.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】単相3線式電源線の異常電圧にて欠相を検
出し、欠相検出信号にてスイッチ手段をオンして主接点
の引き外しコイルを励磁し、引き外しコイルの励磁によ
って電路に挿入された主接点を開放せしめ、欠相検出手
段からN相の電路に接続される検出線を外部配線するよ
うにした欠相遮断器において、欠相検出信号をパルス信
号とするワンショット回路を用いて欠相検出手段を形成
し、欠相検出時に引き外しコイルをパルス的に励磁する
とともに、N相に接続される検出線に主接点に連動する
常閉型の補助接点を挿入したことを特徴とする欠相遮断
器。
1. An open circuit is detected by an abnormal voltage of a single-phase 3-wire power supply line, a switch means is turned on by an open phase detection signal to excite a trip coil of a main contact, and an trip coil is excited. In the open-phase circuit breaker in which the main contact inserted in the electric path is opened and the detection line connected to the N-phase electric path from the open-phase detecting means is externally wired, the open-phase detection signal is a pulse signal. The phase loss detecting means is formed by using a shot circuit, the trip coil is excited in a pulsed manner at the time of phase loss detection, and a normally closed auxiliary contact interlocking with the main contact is inserted in the detection line connected to the N phase. The open-phase circuit breaker characterized by the above.
JP62242065A 1987-09-26 1987-09-26 Phase breaker Expired - Lifetime JPH0828936B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62242065A JPH0828936B2 (en) 1987-09-26 1987-09-26 Phase breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62242065A JPH0828936B2 (en) 1987-09-26 1987-09-26 Phase breaker

Publications (2)

Publication Number Publication Date
JPS6485520A JPS6485520A (en) 1989-03-30
JPH0828936B2 true JPH0828936B2 (en) 1996-03-21

Family

ID=17083757

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62242065A Expired - Lifetime JPH0828936B2 (en) 1987-09-26 1987-09-26 Phase breaker

Country Status (1)

Country Link
JP (1) JPH0828936B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107732869A (en) * 2017-11-17 2018-02-23 国网山东省电力公司淄博供电公司 Height is for low meter spatial load forecasting engineering trip switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63149145U (en) * 1987-03-18 1988-09-30

Also Published As

Publication number Publication date
JPS6485520A (en) 1989-03-30

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