JPH0828937B2 - Phase breaker - Google Patents
Phase breakerInfo
- Publication number
- JPH0828937B2 JPH0828937B2 JP62242067A JP24206787A JPH0828937B2 JP H0828937 B2 JPH0828937 B2 JP H0828937B2 JP 62242067 A JP62242067 A JP 62242067A JP 24206787 A JP24206787 A JP 24206787A JP H0828937 B2 JPH0828937 B2 JP H0828937B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- open
- voltage
- detection
- main contact
- 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 - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims description 53
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 206010014357 Electric shock Diseases 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000013256 coordination polymer Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
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４図および第５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４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. 4 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. 4 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５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。また、
負荷側端子に接続される検出線lNを外した状態で使用し
た場合、検出線lNの先端充電部に、対地電圧として100V
が発生することになり、内部には保護抵抗があるものの
感電の危機があった。On the other hand, as in the conventional example of FIG. 5, 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. Also,
When used without the detection line l N connected to the load side terminal, 100 V as ground voltage is applied to the tip charging part of the detection line l N.
There was a risk of electric shock, although there was a protective resistance inside.
［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、逆接続を可能にすることができる
とともに、Ｎ相の検出線を外れた状態で使用しても感電
の危険がな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 and to use it in a state where the N-phase detection line is disconnected. Even if there is no danger of electric shock, it is to provide an open circuit 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相の電源線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、Ｎ相の検出線に主接点
に連動して駆動される常閉補助接点を挿入するととも
に、Ｎ相の検出線が接続される欠相検出手段の検出入力
端子にＡ相、Ｂ相間の電圧のうちの一方を抵抗を介して
印加することにより、逆接続を可能にすることができる
とともに、Ｎ相の検出線を外した状態で使用しても、感
電の危険がな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 the trip coil and the detection line connected to the N-phase power line from the open-phase detecting means is externally wired, A normally closed auxiliary contact driven in conjunction with the main contact is inserted in the phase detection line, and the voltage between the A phase and the B phase is detected at the detection input terminal of the open-phase detecting means to which the N phase detection line is connected. By applying one of the two via a resistor, a reverse connection can be made possible and, even when used with the N-phase detection line removed, there is no danger of electric shock, and a phase-break circuit breaker is provided. It is a thing.
（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、Ｎ相の検出線lNに主接点S1に連動し
て駆動される補助接点S2の常閉側接点ａを挿入するとと
もに、Ｎ相の検出線lNが接続される欠相検出手段の検出
入力端子にＡ相、Ｂ相間の電圧のうちのいずれか一方を
抵抗R1を介して印加したものである。実施例にあって
は、補助接点S2の常開側接点ｂおよび抵抗R1を介してＡ
相の電圧がラッチ用トランジスタＱのベースに印加され
るようになっている。また、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CP1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
ための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とで形成されている。なお、IC内には、遅延回
路TDから出力される欠相検出信号Vo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Vcc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 normally closed contact a of the auxiliary contact S 2 driven in conjunction with the main contact S 1 is connected to the N-phase detection line l N. And a voltage between the A-phase and the B-phase is applied to the detection input terminal of the open-phase detecting means to which the N-phase detection line 1 N is connected via the resistor R 1. . In the embodiment, A is connected via the normally open contact b of the auxiliary contact S 2 and the resistor R 1.
The phase voltage is applied to the base of the latching transistor Q. Further, the open-phase detecting means is integrated (the portion surrounded by the one-dot chain line), and a comparator for detecting the open-phase by comparing the voltage V 1 detected via the detection line l N with the reference voltage Vs 1. and CP 1, a waveform shaping circuit WS to the waveform shaping comparator CP 1 output, which is formed by a delay circuit TD that delays by appropriately time the output of the phase loss detection signal to prevent malfunctions due to noise. In the IC, the thyristor SCR is supplied with the open phase detection signal Vo output from the delay circuit TD.
Output circuit OT that triggers pulse-wise and constant current circuit SC
And a constant voltage circuit SV that stabilizes the DC power supply rectified by the diode bridge DB and supplies the circuit power supply Vcc to each part.
And a leakage detection circuit are provided, and the leakage detection circuit is an amplifier AP that amplifies the zero-phase current transformer ZCT output, and a comparator that detects the leakage by comparing the amplifier AP output with the reference voltage Vs 2. It is composed of CP 2 and 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がトリガされてオ
ンし、引き外しコイルＬを励磁して主接点S1のトリップ
を解除し、主接点S1をオフして単相３線式電路を遮断す
る。このとき同時に、補助接点S2の常開側接点ｂがオン
され、トランジスタＱがオンして端子がアースされる
ので、欠相検出信号Voが出力されなくなってサイリスタ
SCRがオフし、電源および負荷が逆接続された場合にあ
っても引き外しコイルＬの連続励磁による不都合が生じ
ないようになっている。なお、トランジスタＱにて端子
をアースしてサイリスタSCRのトリガを停止するよう
にしても良く、他の手段でサイリスタSCRをオフさせて
も良い。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 is inputted to the output circuit OT, thyristor SCR is triggered to turn on and exciting the tripping coil L releases the trip of the main contact S 1, turns off the main contact S 1 Shut off the single-phase three-wire circuit. At this time, at the same time, the normally open contact b of the auxiliary contact S 2 is turned on, the transistor Q is turned on and the terminal is grounded, so that the open phase detection signal Vo is not output and the thyristor is not output.
Even if the SCR is turned off and the power source and the load are reversely connected, the trouble due to the continuous excitation of the trip coil L does not occur. The terminal may be grounded by the transistor Q to stop the trigger of the thyristor SCR, or the thyristor SCR may be turned off by other means.
また、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。Further, 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
いる補助接点S2の常閉側接点ａがオフされるので、第５
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。Next, when a power source and a load are reversely connected to the open-phase circuit breaker A, the normally-closed contact a of the auxiliary contact S 2 inserted in the N-phase detection line l N is turned off when the open phase is detected. , Fifth
Unlike the conventional example, the detection line l N does not impair the function of interrupting the electric circuit due to wraparound.
一方、Ｎ相の検出線lNを外した状態で使用した場合に
あっては、抵抗R1を介してＡ相の電圧の分圧電圧が検出
入力端子に印加され、欠相状態と等価な電圧が印加さ
れたことになって、欠相検出信号Voが出力されてサイリ
スタSCRがオンし、引き外しコイルＬが励磁されて欠相
遮断動作が行なわれる。したがって、Ｎ相の検出線lNに
は電圧が発生せず、Ｎ相の検出線lNを外した状態で使用
しても感電の危険がない。On the other hand, when used with the N-phase detection line l N disconnected, the divided voltage of the A-phase voltage is applied to the detection input terminal via the resistor R 1 and is equivalent to the open phase state. When the voltage is applied, the open phase detection signal Vo is output, the thyristor SCR is turned on, the trip coil L is excited, and the open phase interruption operation is performed. Therefore, voltage is not generated in the detection line l N of the N phase, there is no danger of electric shock be used when opening the detection line l N of the N phase.
（実施例２） 第３図は他の実施例を示すもので、トランジスタＱに
代えて、遅延回路TD出力にてトリガされるワンショット
回路MM1を用い、サイリスタSCRを一定時間だけオンさせ
るようにして引き外しコイルＬをパルス的に励磁するよ
うにしたものであり、他の構成および動作は実施例１と
全く同一である。(Embodiment 2) FIG. 3 shows another embodiment. Instead of the transistor Q, a one-shot circuit MM 1 triggered by the output of the delay circuit TD is used to turn on the thyristor SCR for a fixed time. Thus, the trip coil L is excited in a pulsed manner, and other configurations and operations are exactly the same as in the first embodiment.
［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れた主接点を開放
せしめ、欠相検出手段からＮ相の電源線に接続される検
出線を外部配線するようにした欠相遮断器において、Ｎ
相の検出線に主接点に連動して駆動される常閉補助接点
を挿入するとともに、Ｎ相の検出線が接続される欠相検
出手段の検出入力端子にＡ相、Ｂ相間の電圧のいずれか
一方を抵抗を介して印加したものであり、逆接続を可能
にすることができるとともに、Ｎ相の検出線を外した状
態で使用しても感電の危険がないという効果がある。[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. In the open-phase circuit breaker, in which the excited main contact is opened and the detection line connected to the N-phase power supply line from the open-phase detection means is externally wired,
A normally closed auxiliary contact driven in conjunction with the main contact is inserted in the phase detection line, and the voltage between the A phase and the B phase is applied to the detection input terminal of the open phase detection means to which the N phase detection line is connected. Since one of them is applied via a resistor, the reverse connection can be made possible, and there is an effect that there is no risk of electric shock even when used with the N-phase detection line removed.
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図は他の実施例の回路図、第４図および第
５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、R1は抵抗である。FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is an operation explanatory diagram of the same as above, FIG. 3 is a circuit diagram of another embodiment, and FIGS. 4 and 5 are schematic configuration diagrams of a conventional example. is there. A is a phase breaker, S 1 is a main contact, S 2 is an auxiliary contact, l N is a detection line, and R 1 is a resistance.
Claims (1)
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相の電源線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、Ｎ相の検出線に主接点
に連動して駆動される常閉補助接点を挿入するととも
に、Ｎ相の検出線が接続される欠相検出手段の検出入力
端子にＡ相、Ｂ相間の電圧のいずれか一方を抵抗を介し
て印加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 power line from the open-phase detecting means is externally wired, the main contact is connected to the N-phase detection line. A normally closed auxiliary contact driven in conjunction is inserted, and either the A-phase or the B-phase voltage is applied via a resistor to the detection input terminal of the open-phase detection means to which the N-phase detection line is connected. The open-phase circuit breaker characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62242067A JPH0828937B2 (en) | 1987-09-26 | 1987-09-26 | Phase breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62242067A JPH0828937B2 (en) | 1987-09-26 | 1987-09-26 | Phase breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6485522A JPS6485522A (en) | 1989-03-30 |
| JPH0828937B2 true JPH0828937B2 (en) | 1996-03-21 |
Family
ID=17083786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62242067A Expired - Fee Related JPH0828937B2 (en) | 1987-09-26 | 1987-09-26 | Phase breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0828937B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5166085A (en) * | 1987-09-09 | 1992-11-24 | Casio Computer Co., Ltd. | Method of manufacturing a thin film transistor |
| US4990460A (en) * | 1989-01-27 | 1991-02-05 | Nec Corporation | Fabrication method for thin film field effect transistor array suitable for liquid crystal display |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH066673Y2 (en) * | 1987-03-18 | 1994-02-16 | 河村電器産業株式会社 | AA leakage breaker with neutral phase protection |
-
1987
- 1987-09-26 JP JP62242067A patent/JPH0828937B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6485522A (en) | 1989-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |