JPS61150611A - Missing phase detector/breaker for neutral line - Google Patents
Missing phase detector/breaker for neutral lineInfo
- Publication number
- JPS61150611A JPS61150611A JP59277063A JP27706384A JPS61150611A JP S61150611 A JPS61150611 A JP S61150611A JP 59277063 A JP59277063 A JP 59277063A JP 27706384 A JP27706384 A JP 27706384A JP S61150611 A JPS61150611 A JP S61150611A
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Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
[技術分野]
本発明は交流単相3線若しくは交流3相4線の配電線の
中性線の断線を検出して配電線を遮断する中性線欠相検
出遮断器に関するものである。[Detailed Description of the Invention] [Technical Field] The present invention relates to a neutral wire open phase detection and shutoff system that detects disconnection of the neutral wire of an AC single-phase three-wire or AC three-phase four-wire distribution line and shuts off the distribution line. It is related to vessels.
[背景技術1
交流単相3線、交流3相4線式等の中性線を有する配電
線においてその中性線が切断、緩み等にて欠落が発生し
た場合、その欠落点より負荷側の中性線を介して接続さ
れている負荷のバランスにより、負荷側の中性線の電位
が決定される。このような状況において負荷がアンバラ
ンスとなるとき負荷には異常電圧が印加されることとな
り、負荷m器の損傷に至らしめるという欠点があった。[Background technology 1] When the neutral wire of a distribution line with a neutral wire such as an AC single-phase 3-wire system or an AC 3-phase 4-wire system is cut or loosened, etc., the wire on the load side is The potential of the neutral wire on the load side is determined by the balance of the loads connected via the neutral wire. In such a situation, when the load becomes unbalanced, an abnormal voltage will be applied to the load, resulting in damage to the load device.
そこで提供されたのが特公昭54−5092号公報のよ
うな遮断器であった。ところが係る従来例は1IS7図
に示すように中性点比較回路、動作制御回路、動作設定
回路等の処理回路Aは仮想中性点形成回路Bとは別に電
源回路を必要としており、そのため回路構成が複雑化す
るうえに高耐圧部が電源回路と仮想中性点形成回路Bの
2箇所必要とするという欠点があった。Therefore, a circuit breaker such as that disclosed in Japanese Patent Publication No. 54-5092 was provided. However, in the conventional example, as shown in Figure 1IS7, processing circuits A such as a neutral point comparison circuit, an operation control circuit, an operation setting circuit, etc. require a power supply circuit separately from the virtual neutral point forming circuit B, and therefore the circuit configuration is This has the disadvantage that it becomes complicated and requires two high-voltage sections: the power supply circuit and the virtual neutral point forming circuit B.
[発明の目的1
本発明は上述の問題点に鑑みて為されたもので、その目
的とするところは中性線の欠落を検出して配電線を遮断
し負荷の保護を図ることができ、併せて構成が簡単で小
形化が可能な中性線欠相検出遮断器に関するものである
。[Objective of the Invention 1 The present invention has been made in view of the above-mentioned problems, and its purpose is to detect the loss of a neutral wire and cut off the distribution line to protect the load; The present invention also relates to a neutral wire open phase detection circuit breaker that has a simple configuration and can be made compact.
【発明の開示]
本発明は交流単相3線、交流3相4線等の中性線を有す
る配電線に挿入される開閉接点Sと、該開閉接点Sを開
成遮断する遮断駆動WsIと、開閉接点Sと負荷2 m
、 2 bとの闇で配電線の活線LttL2に接続した
全波整流器3と、全波整流器3の出力側若しくは入力側
の各活線り、、L、に挿入された同一値のインピーダン
ス要素と、全波整流器3の出力を平滑する平滑コンデン
サC8と、平滑出力電圧を等分に分圧して中性点の電位
と分圧点の電位とを同一電位に設定する分圧回路6と、
上記分圧回路6の分圧点と中性線Nとの間に生じる電位
差にて流れる電流を積分する電流積分回路4と、該電流
積分回路4の積分出力と予め設定した基準値lとを比較
して積分出力が基準値Iを越えたことを検出すると上記
遮断駆動部1を駆動する弁別回路5とを備え、電流積分
回路4及び弁別回路5の電源を上記平滑出力電圧より得
るものにおいて、上記平滑コンデンサC0の両端に開閉
接点を開成させる連断駆動部1の電磁コイルCLとスイ
ッチング素子との直列回路を接続し、弁別回路5の出力
でスイッチング素子をオン駆動するようにしたことを特
徴とするものである。DISCLOSURE OF THE INVENTION The present invention provides a switching contact S inserted into a distribution line having a neutral wire such as an AC single-phase three-wire or an AC three-phase four-wire, a breaking drive WsI for opening and breaking the switching contact S, Opening/closing contact S and load 2 m
, 2 b, and the impedance element of the same value inserted into each live line LttL2 on the output side or input side of the full wave rectifier 3, connected to the live line LttL2 of the distribution line. , a smoothing capacitor C8 that smoothes the output of the full-wave rectifier 3, and a voltage dividing circuit 6 that divides the smoothed output voltage into equal parts and sets the potential at the neutral point and the potential at the voltage dividing point to the same potential.
A current integrating circuit 4 that integrates the current flowing due to the potential difference generated between the voltage dividing point of the voltage dividing circuit 6 and the neutral wire N, and an integrated output of the current integrating circuit 4 and a preset reference value l. A discrimination circuit 5 which drives the cutoff drive section 1 when it is detected that the integrated output exceeds the reference value I by comparison, and the power source of the current integration circuit 4 and the discrimination circuit 5 is obtained from the smoothed output voltage. , a series circuit of the switching element and the electromagnetic coil CL of the continuous drive unit 1 that opens the switching contacts is connected to both ends of the smoothing capacitor C0, and the switching element is turned on by the output of the discrimination circuit 5. This is a characteristic feature.
以下実施例により説明する。This will be explained below using examples.
R1九り
第1図は交流単相3線の配電線に用いた実施例の回路構
成図を示し、第2図はその具体回路を示しており、遮断
機構部1は駆動するlJl!1lyI接点Sを交流単接
点線の電源ACと負荷21Lt 2 bとの間に直列に
挿入している。そして負荷2 m、 2 bと開閉接点
Sとの間において活線L r −L z間にはダイオー
ドプリフッからなる全波整流器3が接続しており、全波
整流器3の両出力端には抵抗R,,R2を介して平滑コ
ンデンサC4が接続され、整流出力は平滑されるように
なっている。抵抗R+ 、R2は等しい値の抵抗である
0分圧回路6は平滑出力を1/2に分圧するための回路
で等しい値の抵抗Rコ、R4の直列回路から構成され、
その分圧出力を電流積分回路4の入力端子I、に接続し
ている。R19 Figure 1 shows a circuit configuration diagram of an embodiment used in an AC single-phase three-wire distribution line, and Figure 2 shows its specific circuit, in which the interrupting mechanism section 1 is driven by lJl! The 1lyI contact S is inserted in series between the power supply AC of the AC single contact line and the load 21Lt 2 b. A full-wave rectifier 3 consisting of a diode pref is connected between the live wires L r - L z between the loads 2 m, 2 b and the switching contact S, and both output terminals of the full-wave rectifier 3 A smoothing capacitor C4 is connected via resistors R, , R2, so that the rectified output is smoothed. The resistors R+ and R2 are resistors of equal value. The voltage divider circuit 6 is a circuit for dividing the smoothed output into 1/2, and is composed of a series circuit of resistors R+ and R4 of equal value.
The divided voltage output is connected to the input terminal I of the current integrating circuit 4.
電流積分回路4は上記平滑出力を電源として動作するも
ので、1対の入力端子11112を備え、一方の入力端
子■、には上述の分圧出力を、他方の入力端子I2には
負荷2 m、 2 aと開閉後、qSの間の中性線Nを
接続しており、開閉接点Sと電源ACの間の中性線Nに
欠落が生じた際に発生する電位差で両入力端子1..!
2間に流れる電流を積分するようになっている。弁別回
路5は上記平滑出力を電源とするもので、積分出力と予
め設定した基準値1とを比較して基準値1を積分出力が
越えると出力を発生して遮断機構部1を駆動する。遮断
機構部1は活線り、、L、から電源を得、弁別回路5の
出力で動作し開閉接点Sを開成遮断するようになってい
る。The current integrating circuit 4 operates using the above smoothed output as a power source, and is equipped with a pair of input terminals 11112, one input terminal (1) receives the above-mentioned divided voltage output, and the other input terminal I2 receives the load 2 m. , 2 a and after opening/closing, the neutral wire N between qS is connected, and the potential difference that occurs when the neutral wire N between the opening/closing contact S and the power source AC is disconnected causes the voltage difference between both input terminals 1. .. !
The current flowing between the two is integrated. The discrimination circuit 5 uses the smoothed output as a power source, and compares the integrated output with a preset reference value 1, and when the integrated output exceeds the reference value 1, generates an output and drives the cutoff mechanism section 1. The cutoff mechanism section 1 receives power from live wires, L, and is operated by the output of the discrimination circuit 5 to open and cut off the switching contact S.
次に第2図に示す具体回路で動作を説明する。Next, the operation will be explained using the specific circuit shown in FIG.
命中性線Nが正常状態にあるとすると、中性線Nと活線
R1間の電圧は第3図(a)に示すように、また中性I
IANと活線R2闇の電圧は第3図(b)に示すように
なり、また両活線し+yLz間の電圧vbは第3図(c
)のようになっている。そして平滑コンデンサC1に対
して対称に接続された抵抗R5、R2及び抵抗R1、R
4により電圧vbの中点の電圧が分圧回路6の分圧点に
発生する。そのため分圧点と中性線Nの間には電位差が
無いため、電流積分回路4のトランジスタQ、のベース
・エミッタ、高抵抗値の抵抗R,の回路には電流が流れ
ない状態にあり、そのため電流積分回路4の積分出力は
発生しない6
第3図(d)は平滑コンデンサCIの電圧aと、分圧点
の電圧すを示し、また同図(e)は入力端子11又はI
2の電圧を示す。Assuming that the neutral wire N is in a normal state, the voltage between the neutral wire N and the live wire R1 is as shown in Figure 3(a), and the voltage between the neutral wire I
The voltage between IAN and the live wire R2 is as shown in Figure 3 (b), and the voltage vb between both live wires +yLz is as shown in Figure 3 (c
). And resistors R5, R2 and resistors R1, R connected symmetrically to the smoothing capacitor C1.
4, a voltage at the midpoint of the voltage vb is generated at the voltage dividing point of the voltage dividing circuit 6. Therefore, since there is no potential difference between the voltage dividing point and the neutral line N, no current flows through the base-emitter of the transistor Q and the high-resistance resistor R of the current integrating circuit 4. Therefore, the integrated output of the current integrating circuit 4 is not generated. 6 Figure 3 (d) shows the voltage a of the smoothing capacitor CI and the voltage at the voltage dividing point, and Figure 3 (e) shows the voltage a at the input terminal 11 or I
2 voltage is shown.
次に開閉接点Sと電源ACとの間で中性線Nに欠落が生
じると、欠落点より負荷2 at 2 b側の電位は負
荷211t 2 bのインピーダンスRa、Rbの比に
より決定される。Next, when a gap occurs in the neutral wire N between the switching contact S and the power source AC, the potential on the load 2 at 2 b side from the gap point is determined by the ratio of the impedances Ra and Rb of the load 211t 2 b.
従って入力端子I、とI2との間の電位差VaはVa=
VbX[Ra/(Ra+Rb)]−(Vb/2)で表さ
れる。但しvbは活線LISL2間の電圧である。Therefore, the potential difference Va between input terminals I and I2 is Va=
It is expressed as VbX[Ra/(Ra+Rb)]−(Vb/2). However, vb is the voltage between the live wire LISL2.
第4図(、)は活#i L lと中性線N間の電圧を、
又同図(b)は活線L2と中性#XN間の電圧を、また
活線り、、L、間の電圧vbを、又同図(d)は平滑コ
ンデンサCIの電圧aと分圧点の電圧すを、更に同図(
e)は入力端子11.12間の電位差を示す、この時電
流積分回路4のトランジスタQ1のベース・エミッタ、
抵抗R1の回路には電流が流れる。この電流はV a/
Rsだけの値であるが、入力端子I2からI、に流れ
正の電流はダイオードD、を介して全波整流器3へ流れ
る。逆の負の電流時には全波整流器3からトランジスタ
Q1のベース・エミッタ回路に(V a/ Rs)/
(1+ hpa)だけ流れ、トランジスタQ、のエミッ
タ電流がVa/Rsだけ抵抗R6を通じて流れる。この
時のトランジスタQ1のコレクタ電流[Va−hpa/
Rs(1+hpE)= va/ Rslがトランジス
タロ2〜Q3等から構成されたミラー回路の設定電流と
してトランジスタQ2のエミッタ電流が流れる。この電
流が流れるとミラー回路の特性によりトランジスタQ、
のエミッタ電流が同じだけ流れミラー回路の出力電流I
としてVa/R@が流れる。このw&4図(f)は出力
電流Iを示す。Figure 4 (,) shows the voltage between active #i L l and neutral wire N,
In addition, the same figure (b) shows the voltage between the live wire L2 and the neutral #XN, and the voltage vb between the live wires , L, and the same figure (d) shows the voltage a and the divided voltage of the smoothing capacitor CI. The voltage at the point is further plotted in the same figure (
e) shows the potential difference between the input terminals 11 and 12, at this time the base-emitter of the transistor Q1 of the current integration circuit 4;
Current flows through the circuit of resistor R1. This current is Va/
Although the value is only Rs, a positive current flows from the input terminal I2 to I, and flows to the full-wave rectifier 3 via the diode D. In the case of reverse negative current, (V a/Rs)/
(1+hpa) flows, and the emitter current of transistor Q flows by Va/Rs through resistor R6. At this time, the collector current of transistor Q1 [Va-hpa/
Rs(1+hpE)=va/Rsl is the emitter current of the transistor Q2 flowing as a setting current of a mirror circuit composed of transistors 2 to Q3 and the like. When this current flows, transistor Q, due to the characteristics of the mirror circuit,
The emitter current of flows by the same amount as the output current of the mirror circuit I
Va/R@ flows as follows. This w&4 diagram (f) shows the output current I.
この半波の出力電流Iにより積分器のコンデンサC2の
両端電圧が第4図(g)に示すように上昇する。This half-wave output current I causes the voltage across the capacitor C2 of the integrator to rise as shown in FIG. 4(g).
この積分出力は弁別回路5に入力し、トランジスタQ@
がオンする閾値として設定された基準値1を越えるとト
ランジスタQ6をオンさせる。トランジスタQ6がオン
するとトランジスタQ?がオンし、遮断機構部1のトラ
ンジスタQ、をオンさせる。This integral output is input to the discrimination circuit 5, and the transistor Q@
exceeds a reference value 1 set as a threshold for turning on, transistor Q6 is turned on. When transistor Q6 turns on, transistor Q? turns on, turning on the transistor Q of the cutoff mechanism section 1.
従って該トランジスタQ、を介して平滑コンデンサCI
に並列接続して遮断機構の電磁コイルCLに平滑コンデ
ンサCIの放電電流が励磁電流として流れて開閉接点S
は開成駆動され電源ACを遮断し、負荷2m、2bに異
常電圧が印加されるのを防ぐのである。ここで弁別回路
5の基準値1は弁別回路5の出力を安定させるためにヒ
ステリシスを持たせている。つまり”H″にベルの基準
値1はオン時のトランジスタQ6のベース・エミッタ電
圧V BE@X CRs十Rz )/ RIlで決定さ
れ、”L″レベル基準値1はV BES+ベースl M
L I ns X Rsで決定されるようになっている
。つまりトランジスタQ、がオンする前はトランジスタ
Q Ilがオン状態にあり、従って積分出力は抵抗R9
、R1+で分圧される。またトランジスタQ6、Q7が
オンすればトランジスタQI2がオンするためトランジ
スタQ I 1のベース電流が遮断されトランジスタQ
目がオフとなり積分出力が抵抗R9を介してトランジス
タQ6のベースに接続されるのである。Therefore, through the transistor Q, the smoothing capacitor CI
The discharge current of the smoothing capacitor CI flows as an exciting current to the electromagnetic coil CL of the interrupting mechanism, which is connected in parallel to the switching contact S.
is driven open to cut off the power supply AC and prevent abnormal voltage from being applied to the loads 2m and 2b. Here, the reference value 1 of the discrimination circuit 5 has hysteresis in order to stabilize the output of the discrimination circuit 5. In other words, the "H" level reference value 1 is determined by the base-emitter voltage of the transistor Q6 when it is on (V BE@
It is determined by L I ns X Rs. In other words, before transistor Q is turned on, transistor QIl is in the on state, so the integrated output is the resistor R9.
, R1+. Also, when transistors Q6 and Q7 turn on, transistor QI2 turns on, so the base current of transistor QI1 is cut off and transistor Q
2 and the integrated output is connected to the base of transistor Q6 via resistor R9.
尚中性線Nの欠落時に遮断機構部1が動作する電圧Va
は電流積分回路4のコンデンサC2、抵抗R,により充
放電されるが、この電圧のピーク値が弁別回路5のH”
の基準値1に達するときの値である。またこのCR積分
により欠落時の中性線Nの電圧Vaの値に応じて動作す
る時間が異なるように設定できる。従って電圧Vaが低
いときには動作時間が遅(、電圧Vaが高くなると(V
a=ov−vb*で変化)、動作時間が早(なること
により危険度に応じた連断機能を持つことになる。Note that the voltage Va at which the cutoff mechanism section 1 operates when the neutral wire N is missing is
is charged and discharged by the capacitor C2 and resistor R of the current integration circuit 4, and the peak value of this voltage is the H" of the discrimination circuit 5.
This is the value when the standard value 1 is reached. Further, by using this CR integration, it is possible to set the operating time to be different depending on the value of the voltage Va of the neutral line N at the time of missing. Therefore, when the voltage Va is low, the operation time is slow (V
a=ov-vb*), and the operation time is fast (this results in a continuous disconnection function depending on the degree of danger).
更に短時間の雷サージ等による異常電圧で誤動作するの
を防止できる。Furthermore, it is possible to prevent malfunctions due to abnormal voltage caused by short-term lightning surges, etc.
また上記実施例の電流積分回路4では電圧Vaを抵抗R
8で除した電流■は半波であったがダイオードD7をw
&5図に示すように無くせば全波波形の電流となる。Further, in the current integrating circuit 4 of the above embodiment, the voltage Va is connected to the resistance R
The current ■ divided by 8 was a half wave, but the diode D7 was
&5 As shown in Figure 5, if it is eliminated, the current becomes a full-wave waveform.
[発明の効果]
本発明は交流単相3線、交流3相4線等の中性線を有す
る配電線に挿入される開閉接点と、該開閉接点を開成遮
断する遮断駆動部と、開閉接点と負荷との間で配電線の
活線に接続した全波整流器と、全波整流器の出力側若し
くは入力側の各活線に挿入された同一値のインピーダン
ス要素と、全渡整流器の出力を平滑する平滑コンデンサ
と、平滑出力電圧を等分に分圧して中性点の電位と分圧
点の電位とを同一電位に設定する分圧回路と、上記分圧
回路の分圧点と中性線との間に生じる電位差にて流れる
電流を積分する電流積分回路と、該電流積分回路の積分
出力と予め設定した基準値とを比較して積分出力が基準
値を越えたことを検出すると上記遮断駆動部を駆動する
弁別回路とを備えであるから、中性線の欠落が生じると
開閉接点を開成遮断することができ、結果異常電圧より
負荷を保護できるものであって、しかも電流積分回路、
弁別回路、遮断機構部の電源を上記平滑出力電圧より得
るから分圧回路からなる仮想中性点形成回路と同じ電源
を共用でき、そのため構成の簡略化とコンパクト化とが
可能となり、そのうえ電流積分回路により゛サージ等に
よる異常電圧による誤動作も防止できるという効果を奏
するものである。[Effects of the Invention] The present invention provides a switching contact inserted into a distribution line having a neutral wire such as an AC single-phase 3-wire or an AC 3-phase 4-wire, a breaking drive unit that opens and cuts off the switching contact, and a switching contact. A full-wave rectifier connected to the live wire of the distribution line between a smoothing capacitor, a voltage dividing circuit that divides the smoothed output voltage into equal parts and sets the potential of the neutral point and the voltage dividing point to the same potential, and the voltage dividing point of the voltage dividing circuit and the neutral line. A current integrating circuit integrates the current flowing due to the potential difference between Since it is equipped with a discrimination circuit that drives the drive unit, if the neutral wire is missing, the switching contact can be opened or shut off, and as a result, the load can be protected from abnormal voltage.
Since the power supply for the discrimination circuit and the cutoff mechanism is obtained from the above-mentioned smoothed output voltage, the same power supply can be shared with the virtual neutral point forming circuit consisting of the voltage divider circuit, making it possible to simplify and downsize the configuration. This circuit has the effect of preventing malfunctions caused by abnormal voltages such as surges.
第1図は本発明の実施例1の回路構成図、第2図は同上
の具体回路図、第3図、第4図は同上の動作説明の波形
図、第5図は同上使用の電流積分回路の他の例の要部回
路図、第6図は従来例の回路構成図であり、1は遮断機
構部、2 at 2 bは負荷、3は全波整流器、4は
電流積分回路、5は弁別回路、6は分圧回路、R1〜R
,は抵抗、C5は平滑コンデンサ、Sは開閉接点、L
、−L 2は活線、Nは中性線、Q、はトランジスタ、
CLは電磁コイルである。
代理人 弁理士 石 1)艮 七
第3図
(e) □
第4@
第5図
第6図Fig. 1 is a circuit configuration diagram of the first embodiment of the present invention, Fig. 2 is a specific circuit diagram of the same as above, Figs. 3 and 4 are waveform diagrams for explaining the operation of the above, and Fig. 5 is a current integral diagram used in the above. A main part circuit diagram of another example of the circuit, FIG. 6 is a circuit configuration diagram of a conventional example, where 1 is a cutoff mechanism section, 2 at 2 b is a load, 3 is a full-wave rectifier, 4 is a current integration circuit, and 5 is a discrimination circuit, 6 is a voltage dividing circuit, R1 to R
, is a resistor, C5 is a smoothing capacitor, S is a switching contact, L
, -L2 is a live wire, N is a neutral wire, Q is a transistor,
CL is an electromagnetic coil. Agent Patent Attorney Ishi 1) Ai 7 Figure 3 (e) □ 4 @ Figure 5 Figure 6
Claims (1)
配電線に挿入される開閉接点と、該開閉接点を開成遮断
する遮断駆動部と、開閉接点と負荷との間で配電線の活
線に接続した全波整流器と、全波整流器の出力側若しく
は入力側の各活線に挿入された同一値のインピーダンス
要素と、全波整流器の出力を平滑する平滑コンデンサと
、平滑出力電圧を等分に分圧して中性点の電位と分圧点
の電位とを同一電位に設定する分圧回路と、上記分圧回
路の分圧点と中性線との間に生じる電位差にて流れる電
流を積分する電流積分回路と、該電流積分回路の積分出
力と予め設定した基準値とを比較して積分出力が基準値
を越えたことを検出すると上記遮断駆動部を駆動する弁
別回路とを備え、電流積分回路及び弁別回路の電源を上
記平滑出力電圧より得る中性線欠相検出遮断器において
、上記平滑コンデンサの両端に開閉接点を開成させる遮
断駆動部の電磁コイルとスイッチング素子との直列回路
を接続し、弁別回路の出力でスイッチング素子をオン駆
動するようにしたことを特徴とする中性線欠相検出遮断
器。(1) A switching contact inserted into a distribution line having a neutral line such as AC single-phase 3-wire or AC 3-phase 4-wire, a cutoff drive unit that opens and breaks the switching contact, and a connection between the switching contact and the load. a full-wave rectifier connected to the live wire of the distribution line, an impedance element of the same value inserted in each live wire on the output side or input side of the full-wave rectifier, and a smoothing capacitor for smoothing the output of the full-wave rectifier; This occurs between a voltage divider circuit that divides the smoothed output voltage into equal parts and sets the potential at the neutral point and the voltage divider point to the same potential, and the voltage divider point of the above voltage divider circuit and the neutral line. A current integrating circuit that integrates a current flowing due to a potential difference, and a current integrating circuit that compares the integrated output of the current integrating circuit with a preset reference value and drives the cutoff drive unit when it is detected that the integrated output exceeds the reference value. in the neutral line open phase detection circuit breaker, which is provided with a discrimination circuit and obtains power for the current integration circuit and the discrimination circuit from the smoothed output voltage, an electromagnetic coil of a cutoff drive section that opens switching contacts at both ends of the smoothing capacitor, and a switching circuit. 1. A neutral wire open phase detection circuit breaker, characterized in that a series circuit with the element is connected, and the output of the discrimination circuit turns on the switching element.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59277063A JP2686071B2 (en) | 1984-12-24 | 1984-12-24 | Neutral wire open phase detection circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59277063A JP2686071B2 (en) | 1984-12-24 | 1984-12-24 | Neutral wire open phase detection circuit breaker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61150611A true JPS61150611A (en) | 1986-07-09 |
JP2686071B2 JP2686071B2 (en) | 1997-12-08 |
Family
ID=17578264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59277063A Expired - Fee Related JP2686071B2 (en) | 1984-12-24 | 1984-12-24 | Neutral wire open phase detection circuit breaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2686071B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61164417A (en) * | 1985-01-14 | 1986-07-25 | 松下電工株式会社 | Neutral-conductor open-phase detecting breaker |
JPS63114521A (en) * | 1986-10-31 | 1988-05-19 | ソニー株式会社 | Source circuit |
US7281574B2 (en) | 2003-02-13 | 2007-10-16 | Denso Corporation | Automotive air conditioning system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56129871A (en) * | 1980-03-14 | 1981-10-12 | Matsushita Electric Works Ltd | Detector for missing of neutral conductor |
JPS57154068A (en) * | 1981-03-19 | 1982-09-22 | Mitsubishi Electric Corp | Phase discriminator |
-
1984
- 1984-12-24 JP JP59277063A patent/JP2686071B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56129871A (en) * | 1980-03-14 | 1981-10-12 | Matsushita Electric Works Ltd | Detector for missing of neutral conductor |
JPS57154068A (en) * | 1981-03-19 | 1982-09-22 | Mitsubishi Electric Corp | Phase discriminator |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61164417A (en) * | 1985-01-14 | 1986-07-25 | 松下電工株式会社 | Neutral-conductor open-phase detecting breaker |
JPH07112328B2 (en) * | 1985-01-14 | 1995-11-29 | 松下電工株式会社 | Neutral wire open phase detection circuit breaker |
JPS63114521A (en) * | 1986-10-31 | 1988-05-19 | ソニー株式会社 | Source circuit |
US7281574B2 (en) | 2003-02-13 | 2007-10-16 | Denso Corporation | Automotive air conditioning system |
Also Published As
Publication number | Publication date |
---|---|
JP2686071B2 (en) | 1997-12-08 |
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