JPH0217823A - Abnormal voltage detection breaker - Google Patents
Abnormal voltage detection breakerInfo
- Publication number
- JPH0217823A JPH0217823A JP88165253A JP16525388A JPH0217823A JP H0217823 A JPH0217823 A JP H0217823A JP 88165253 A JP88165253 A JP 88165253A JP 16525388 A JP16525388 A JP 16525388A JP H0217823 A JPH0217823 A JP H0217823A
- Authority
- JP
- Japan
- Prior art keywords
- impedance
- voltage
- voltage detection
- abnormal voltage
- circuit breaker
- 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.)
- Pending
Links
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 230000007935 neutral effect Effects 0.000 claims description 9
- 230000005856 abnormality Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の背景〕
この発明は、交流単相３線式又は、三相４線式等の如き
中性線を有する回路に使用する異常電圧検出遮断器に関
する。DETAILED DESCRIPTION OF THE INVENTION [Background of the Invention] The present invention relates to an abnormal voltage detection circuit breaker used in a circuit having a neutral line, such as an AC single-phase three-wire system or a three-phase four-wire system.
該遮断器は、通常、異常電圧検出端子を該遮断器の負荷
側の電路の中性極に接続して使用するが、接続忘れ、接
続不完全等の場合によっては、無接続状態となることが
考えられる。このような状態で該遮断器の電源側又は、
該遮断器の中性極で欠相が生じた場合、負荷のインピー
ダンスの平衡状態により、負荷機器に異常電圧が印加さ
れても遮断器が動作せず、負荷機器が焼損に至る危険性
があった。従ってこのような事態を招かないよう′未然
に防止することが望ましい。This circuit breaker is normally used by connecting the abnormal voltage detection terminal to the neutral pole of the circuit on the load side of the circuit breaker, but in some cases, such as forgetting to connect or incomplete connection, the circuit breaker may become disconnected. is possible. In such a state, the power supply side of the circuit breaker or
If an open phase occurs at the neutral pole of the circuit breaker, the circuit breaker will not operate even if an abnormal voltage is applied to the load equipment due to the impedance balance of the load, and there is a risk that the load equipment will burn out. Ta. Therefore, it is desirable to prevent such a situation from occurring.
以上の様な不具合を防止するため、本件の発明では、異
常電圧検出端子を遮断器内で適当なインピ−ダンスを介
して任意の電圧線に接続させ、異常電圧検出端子が、該
遮断器の負荷側の中性極に対し無接続状態となった場合
には、該インピーダンスを介して電圧線より異常電圧検
出端子が接続される比較部の入力に該比較部の基準電圧
より充分大きな信号を与え、比較部はスイッチング素子
に信号を送りスイッチング素子が動作する。スイッチン
グ素子が動作すれば、該遮断器の引き外しコイルに所定
の電圧を印加し該遮断器は開路する。In order to prevent the above-mentioned problems, in the present invention, the abnormal voltage detection terminal is connected to an arbitrary voltage line through an appropriate impedance in the circuit breaker, and the abnormal voltage detection terminal is If there is no connection to the neutral pole on the load side, a signal that is sufficiently larger than the reference voltage of the comparison section is sent to the input of the comparison section to which the abnormal voltage detection terminal is connected from the voltage line through the impedance. The comparator section sends a signal to the switching element, and the switching element operates. When the switching element operates, a predetermined voltage is applied to the tripping coil of the circuit breaker, thereby opening the circuit breaker.
このようにすることにより前記した事故を未然に防止す
ることができる。By doing so, the above-mentioned accidents can be prevented.
第１図は本発明の一実施例を示し、第２図〜第４図はそ
の応用例を各々示す。FIG. 1 shows an embodiment of the present invention, and FIGS. 2 to 4 show examples of its application.
第１図の如く、電圧線（Ｌｌ）と異常電圧検出端子（Ｕ
）間にインピーダンスＺ３を設けたことにより先ず、異
常電圧検出用端子（Ｕ）が無接続状態になった場合につ
いてであるが、異常電圧検出用端子（Ｕ）は、電圧線（
Ｌｌ）よりインピーダンス（Ｚ３）を通し、インピーダ
ンスＺ２．Ｚｌ及び整流部を通して他方の電圧線（Ｌｌ
）に電流が流れる。この電流によりインピーダンスＺｌ
に発生する電圧Ｖｚｌが比較部の基準電圧（Ｖｓ）１対
し
Ｖｚｌ＞＞Ｖｓ
となるようインピーダンス２１を選定しておけば比較部
を通じ、スイッチング素子（ＳＣＲ）２に信号が送られ
スイッチング素子が動作し、該遮断器の引き外しコイル
（Ｔ、Ｃ）３に所定の電圧が印加され該遮断器を開路す
る。As shown in Figure 1, the voltage line (Ll) and the abnormal voltage detection terminal (U
) The abnormal voltage detection terminal (U) becomes unconnected due to the provision of impedance Z3 between the voltage lines (
Ll) through impedance (Z3), impedance Z2. Zl and the other voltage line (Ll
). This current causes impedance Zl
If the impedance 21 is selected so that the voltage Vzl generated in the comparison section is Vzl>>Vs with respect to the reference voltage (Vs) 1 of the comparison section, a signal is sent to the switching element (SCR) 2 through the comparison section, and the switching element operates. Then, a predetermined voltage is applied to the tripping coils (T, C) 3 of the circuit breaker to open the circuit breaker.
次に正常時についてであるが、正常時は異常電圧検出端
子（Ｕ）に電圧線間電圧の１／２の電圧が印加され電流
はインピーダンスＺ３と、インピーダンスＺ２ 、 Ｚ
ｌ 、整流部とからなる回路に分岐して流れインピーダ
ンスＺｌには■２１′なる電圧が発生する。この電圧が
基準電圧（〜／ｓ）１に対し
Ｖｚｌ’ ＜Ｖｓ
となっていれば比較部の出力は発生しないため、スイッ
チング素子（Ｓ ＣＲ）へ信号は送られず該遮断器は閉
路状態を維持する。更に、正常に異常電圧検出端子（Ｕ
）が接続されていて、配電線の中性線が欠相した場合で
あるが、負荷の平衡状態により例えば、電圧線（Ｌｌ）
と異常電圧検出端子（Ｕ）間の電圧が規定の条件の電圧
に達すると電流はインピーダンスＺ３とインピーダンス
Ｚ２゜Ｚｌ、整流部からなる回路に分岐して流れ、イン
ピーダンスＺｌにはＶｚｌ”なる電圧が発生する。Next, regarding normal times, during normal times, a voltage of 1/2 of the line voltage is applied to the abnormal voltage detection terminal (U), and the current flows through impedance Z3, impedance Z2, and Z.
1 and a rectifier, and a voltage of 21' is generated at the flow impedance Z1. If this voltage is Vzl'< Vs with respect to the reference voltage (~/s) 1, no output is generated from the comparator, so no signal is sent to the switching element (SCR) and the circuit breaker is closed. maintain. Furthermore, the abnormal voltage detection terminal (U
) is connected, and the neutral line of the distribution line has an open phase, but due to the load balance, for example, the voltage line (Ll)
When the voltage between the and abnormal voltage detection terminal (U) reaches the specified voltage, the current branches into a circuit consisting of impedance Z3, impedance Z2゜Zl, and a rectifier, and a voltage of Vzl'' is applied to impedance Zl. Occur.
この電圧が基準電圧（Ｖｓ）１に対し
Ｖｚｌ”＞Ｖｓ
となっていれば、比較部の出力に１言号が発生し、スイ
ッチング素子（ＳＣＲ）２に送られ、スイッチング素子
（ＳＣＲ）２が動作をし、該遮断器の引き外しコイル（
Ｔ、Ｃ’）３に規定の電圧が発生し該遮断器を開路する
。If this voltage is Vzl''>Vs with respect to the reference voltage (Vs) 1, one word is generated at the output of the comparator and sent to the switching element (SCR) 2, and the switching element (SCR) 2 The tripping coil of the circuit breaker (
A specified voltage is generated at T, C')3, opening the circuit breaker.
このように本件で提示した適当な値のインピーダンスを
任意の電圧線と異常電圧検出端子間に挿入すれば前記し
たように異常電圧検出端子が無接続状態となっても該遮
断器が動作し負荷の焼損を未然に防止することができる
。In this way, if the impedance of the appropriate value presented in this case is inserted between any voltage line and the abnormal voltage detection terminal, the circuit breaker will operate even if the abnormal voltage detection terminal is disconnected as described above, and the load will be burnout can be prevented.
従来は、第５図に示した回路方式により異常電圧を検出
していたが異常電圧検出端子（Ｕ）が無接続となってい
た時には配電線の中性線が欠相して負荷の平衡状態によ
り負荷機器に異常電圧が発生しても保護のしようがなか
った。Conventionally, abnormal voltage was detected using the circuit system shown in Figure 5, but when the abnormal voltage detection terminal (U) was disconnected, the neutral line of the distribution line had an open phase and the load was in an unbalanced state. Therefore, there was no way to protect the load equipment even if abnormal voltage occurred.
（効果の確認〕
本件のように、異常電圧検出端子と任意の電圧線間に適
当な値のインピーダンスＺ３を挿入することにより前記
のような問題点が解決でき、よりフェイルセーフな特徴
を有する異常電圧検出遮断器を提供することが可能とな
った。(Confirmation of effect) As in this case, the above problems can be solved by inserting impedance Z3 of an appropriate value between the abnormal voltage detection terminal and any voltage line, and the abnormality has more fail-safe characteristics. It has become possible to provide a voltage detection circuit breaker.
第１図は、本発明回路であり、第２図〜第４図はその応
用回路例、第５図は従来回路例を各々示す。
（主要部分の符号の説明）
１・・・・基準電圧部
２・・・・スイッチング素子
３・・・・該遮断器用き外しコイル部
Ｚｌ、 Ｚ２．２３−拳番・インピーダンス部Ｌｌ、
Ｌｌ・・・・電圧線部
Ｕ・・・・異常電圧検出端子部FIG. 1 shows a circuit according to the present invention, FIGS. 2 to 4 show examples of applied circuits thereof, and FIG. 5 shows an example of a conventional circuit. (Explanation of symbols of main parts) 1...Reference voltage section 2...Switching element 3...The circuit breaker disconnection coil section Zl, Z2.23-Fist number/impedance section Ll,
Ll... Voltage line part U... Abnormal voltage detection terminal part
Claims (1)
る電路に使用する、中性線欠相の際に負荷に加わる異常
電圧を検出し、電路を遮断して負荷を保護する遮断器に
おいて該遮断器の異常電圧検出端子が負荷側の電路の中
性極に接続されていない場合、該遮断器が自動遮断する
よう、任意の電圧線と異常電圧検出端子間に適当な値の
インピーダンスを挿入して成ることを特徴とする異常電
圧検出遮断器。This function is used for electrical circuits with a neutral line such as AC single-phase three-wire systems or three-phase four-wire systems, and detects abnormal voltage applied to the load when the neutral line is open, interrupts the electrical circuit, and removes the load. If the abnormal voltage detection terminal of the circuit breaker to be protected is not connected to the neutral pole of the load-side electrical circuit, the circuit breaker should be connected between any voltage line and the abnormal voltage detection terminal so that the circuit breaker automatically shuts off. An abnormal voltage detection circuit breaker characterized by inserting an impedance of a certain value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP88165253A JPH0217823A (en) | 1988-07-01 | 1988-07-01 | Abnormal voltage detection breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP88165253A JPH0217823A (en) | 1988-07-01 | 1988-07-01 | Abnormal voltage detection breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0217823A true JPH0217823A (en) | 1990-01-22 |
Family
ID=15808798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP88165253A Pending JPH0217823A (en) | 1988-07-01 | 1988-07-01 | Abnormal voltage detection breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0217823A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03104038U (en) * | 1990-02-09 | 1991-10-29 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56133933A (en) * | 1980-03-21 | 1981-10-20 | Matsushita Electric Works Ltd | Neutral wire fault detector |
-
1988
- 1988-07-01 JP JP88165253A patent/JPH0217823A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56133933A (en) * | 1980-03-21 | 1981-10-20 | Matsushita Electric Works Ltd | Neutral wire fault detector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03104038U (en) * | 1990-02-09 | 1991-10-29 |
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