JP2806162B2 - Switch - Google Patents
SwitchInfo
- Publication number
- JP2806162B2 JP2806162B2 JP4219256A JP21925692A JP2806162B2 JP 2806162 B2 JP2806162 B2 JP 2806162B2 JP 4219256 A JP4219256 A JP 4219256A JP 21925692 A JP21925692 A JP 21925692A JP 2806162 B2 JP2806162 B2 JP 2806162B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power switch
- switch
- circuit
- 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 - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、配電系統の区間開閉器
などに使用される開閉器の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a switch used for a section switch of a distribution system or the like.
【０００２】[0002]
【従来の技術】図２は、例えば平成元年電気学会全国大
会講演論文集［１０］（電力保護１０−１０６／１０
７）で発表された静止形開閉器の回路図を示す。図にお
いて、１は逆並列に接続された一対のサイリスタ素子か
らなる電力スイッチ、２は電力スイッチ１の一端に直列
接続された、サイリスタ素子の漏れ電流を遮断するため
の真空電磁接触器、３は電力スイッチ１に並列接続され
た酸化亜鉛形避雷器、５は負荷側電圧を検出するための
負荷電圧検出用ＰＴ（計器用変圧器）、６は電路接続用
ケーブルである。2. Description of the Related Art FIG.
Fig. 7 shows a circuit diagram of the static switch announced in 7). In the figure, 1 is a power switch composed of a pair of thyristor elements connected in anti-parallel, 2 is a vacuum electromagnetic contactor connected in series to one end of the power switch 1 for interrupting leakage current of the thyristor element, 3 is A zinc oxide arrester connected in parallel to the power switch 1 is a load voltage detecting PT (instrument transformer) 5 for detecting a load-side voltage, and 6 is a circuit connection cable.
【０００３】９は電圧低下検出回路７とオン信号発生回
路８とからなる制御装置である。電圧低下検出回路７
は、負荷電圧検出用ＰＴ５の検出電圧を監視し、負荷側
の電圧が予め定めた値以下となった時にこれを検出する
回路である。オン信号発生回路８は、電圧低下検出回路
７の検出信号に応じて電力スイッチ１を導通させるため
のオン信号を発生する回路である。A control device 9 includes a voltage drop detection circuit 7 and an ON signal generation circuit 8. Voltage drop detection circuit 7
Is a circuit for monitoring the detection voltage of the load voltage detection PT5 and detecting when the voltage on the load side falls below a predetermined value. The ON signal generation circuit 8 is a circuit that generates an ON signal for turning on the power switch 1 in accordance with the detection signal of the voltage drop detection circuit 7.
【０００４】前記構成になる開閉器は、例えばループ式
配電系統の区間開閉器として使用され、真空電磁接触器
２を投入した状態において、負荷電圧検出用ＰＴ５によ
って検出される負荷側電圧を電圧低下検出回路７で常時
監視する。そして、負荷電圧検出用ＰＴ５の検出電圧が
予め定めた値以下になると、これを電圧低下検出回路７
で検出し、検出信号をオン信号発生回路８に送る。オン
信号発生回路８はこの検出信号に応じてオン信号を出力
し、各相の電力スイッチ１を導通させる。これにより、
何らかの事故によって負荷側の電圧が規定値以下に低下
すると、電力スイッチ１が導通して電力の供給が開始さ
れ、負荷側の無停電化が図られる。The switch having the above-mentioned configuration is used, for example, as a section switch of a loop-type distribution system. When the vacuum electromagnetic contactor 2 is turned on, the load-side voltage detected by the load voltage detecting PT5 is reduced. The detection circuit 7 constantly monitors. When the detected voltage of the load voltage detecting PT5 becomes equal to or less than a predetermined value, the voltage is detected by the voltage drop detecting circuit 7.
And sends a detection signal to the ON signal generation circuit 8. The ON signal generation circuit 8 outputs an ON signal according to the detection signal, and makes the power switches 1 of each phase conductive. This allows
When the voltage on the load side drops below a specified value due to some accident, the power switch 1 is turned on to start supplying power, thereby achieving uninterrupted power on the load side.
【０００５】[0005]
【発明が解決しようとする課題】従来の開閉器は前記の
ように構成されているので、何らかの原因によって電力
スイッチ１の両端間に過電圧が長時間印加されると、こ
れと並列に接続された酸化亜鉛形避雷器３にもその過電
圧が印加され、酸化亜鉛形避雷器３の破壊を招くという
問題があった。このような問題は、例えば、１相の電力
スイッチが短絡状態となって他相の電力スイッチに線間
電圧が長時間印加された場合などに生じ得る。Since the conventional switch is constructed as described above, if an overvoltage is applied for a long time between both ends of the power switch 1 for some reason, the switch is connected in parallel with the switch. The overvoltage is also applied to the zinc oxide lightning arrester 3, which causes a problem that the zinc oxide lightning arrester 3 is destroyed. Such a problem may occur, for example, when one-phase power switch is short-circuited and line voltage is applied to the other-phase power switch for a long time.
【０００６】本発明は前記問題を解決するためになされ
たもので、過電圧の印加による酸化亜鉛形避雷器の破壊
を防止した開閉器を提供することを目的とするものであ
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a switch capable of preventing a zinc oxide surge arrester from being destroyed by application of an overvoltage.
【０００７】[0007]
【課題を解決するための手段】本発明は、各相に設けら
れた電力スイッチと、該電力スイッチに並列接続された
酸化亜鉛形避雷器と、前記電力スイッチに直列接続され
た電磁接触器とを備えた開閉器において、前記電力スイ
ッチに並列接続され、電力スイッチの両端間の電圧を検
出する電圧検出手段と、該電圧検出手段の検出電圧が予
め定めた値を越えた時に前記電磁接触器を自動的に開放
する制御手段とを設けることにより構成したものであ
る。The present invention comprises a power switch provided for each phase, a zinc oxide arrester connected in parallel to the power switch, and an electromagnetic contactor connected in series to the power switch. A switch provided in parallel with the power switch, for detecting a voltage between both ends of the power switch, and the electromagnetic contactor when a detection voltage of the voltage detection means exceeds a predetermined value. And a control means for automatically opening.
【０００８】[0008]
【作用】電圧検出手段で検出した電力スイッチの両端間
の電圧が予め定めた値を越えると、制御手段が電磁接触
器を自動的に開放する。この結果、電路が自動的に遮断
され、電力スイッチへの過電圧の印加が阻止される。し
たがって、電力スイッチに並列接続された酸化亜鉛形避
雷器への過電圧の印加も遮断され、過電圧による酸化亜
鉛形避雷器の破壊が防止される。When the voltage across the power switch detected by the voltage detection means exceeds a predetermined value, the control means automatically opens the electromagnetic contactor. As a result, the electric circuit is automatically cut off, and application of an overvoltage to the power switch is prevented. Therefore, the application of the overvoltage to the zinc oxide arrester connected in parallel with the power switch is also cut off, and the overbreak of the zinc oxide arrester is prevented.
【０００９】[0009]
【実施例】図１に本発明の第１実施例を示す。図におい
て、１は電力スイッチ、３は電力スイッチ１に並列接続
された酸化亜鉛形避雷器、５は負荷側電圧を検出するた
めの負荷電圧検出用ＰＴ、６は電路接続用ケーブル、７
は電圧低下検出回路、８はオン信号発生回路である。こ
れらの回路および素子は、従来例（図４）と同じもので
ある。FIG. 1 shows a first embodiment of the present invention. In the figure, 1 is a power switch, 3 is a zinc oxide arrester connected in parallel to the power switch 1, 5 is a PT for detecting a load voltage for detecting a load side voltage, 6 is a cable for connecting a circuit, 7
Is a voltage drop detection circuit, and 8 is an ON signal generation circuit. These circuits and elements are the same as the conventional example (FIG. 4).
【００１０】１０，１１は電力スイッチ１に並列接続さ
れた過電圧検出用の分圧抵抗、１２は該分圧抵抗１０，
１１の中点から取り出された電力スイッチ１の両端間電
圧を監視し、予め定めた値以下となったときに検出信号
を発生する過電圧検出回路である。１３は過電圧検出回
路１２の検出信号に応じて真空電磁接触器２Ａを開放す
る真空電磁接触器制御回路である。４Ａは静止形開閉
器、９Ａは制御装置である。[0010] Reference numerals 10 and 11 denote voltage dividing resistors connected in parallel to the power switch 1 for overvoltage detection, and 12 denotes a voltage dividing resistor 10 and 11.
This is an overvoltage detection circuit that monitors the voltage between both ends of the power switch 1 taken out from the middle point of 11 and generates a detection signal when the voltage becomes equal to or less than a predetermined value. Reference numeral 13 denotes a vacuum electromagnetic contactor control circuit that opens the vacuum electromagnetic contactor 2A according to the detection signal of the overvoltage detection circuit 12. 4A is a static switch, and 9A is a control device.
【００１１】次に前記第１実施例の動作について説明す
る。なお、負荷電圧検出用ＰＴ５，電圧低下検出回路７
およびオン信号発生回路８による電力スイッチ１の開閉
制御は、従来例（図４）のものと同じであるのでその説
明は省略し、本発明の特徴部分の動作のみを以下に説明
する。Next, the operation of the first embodiment will be described. The load voltage detection PT 5 and the voltage drop detection circuit 7
The opening / closing control of the power switch 1 by the ON signal generation circuit 8 is the same as that of the conventional example (FIG. 4), so that the description thereof is omitted, and only the operation of the characteristic portions of the present invention will be described below.
【００１２】分圧抵抗１０，１１の中点から取り出され
た電力スイッチ１の両端間電圧は過電圧検出回路１２へ
送られ、過電圧検出回路１２で常時監視される。そし
て、何らかの原因によって電力スイッチ１の両端間電圧
が予め定めた値よりも高くなると、過電圧検出回路１２
がこれを検出し、真空電磁接触器制御回路１３へ検出信
号を送出する。The voltage between both ends of the power switch 1 taken out from the midpoint between the voltage dividing resistors 10 and 11 is sent to an overvoltage detection circuit 12 and is constantly monitored by the overvoltage detection circuit 12. When the voltage between both ends of the power switch 1 becomes higher than a predetermined value for some reason, the overvoltage detection circuit 12
Detects this, and sends a detection signal to the vacuum electromagnetic contactor control circuit 13.
【００１３】真空電磁接触器制御回路１３は前記検出信
号に応じて真空電磁接触器２Ａを開放し、電力スイッチ
１に印加された過電圧を自動的に遮断する。この結果、
電力スイッチ１に並列接続された酸化亜鉛形避雷器３へ
の過電圧の印加も遮断され、過電圧による酸化亜鉛形避
雷器３の破壊が防止される。The vacuum electromagnetic contactor control circuit 13 opens the vacuum electromagnetic contactor 2A in response to the detection signal and automatically shuts off the overvoltage applied to the power switch 1. As a result,
The application of the overvoltage to the zinc oxide lightning arrester 3 connected in parallel to the power switch 1 is also cut off, thereby preventing the zinc oxide lightning arrester 3 from being damaged by the overvoltage.
【００１４】図２に本発明の第２実施例を示す。前記第
１実施例では、分圧抵抗１０，１１によって電力スイッ
チ１の両端間電圧を検出するようにしたが、これに代
え、図２に示すように、ＰＴ（計器用変圧器）１４を用
いることもできる。ＰＴを用いた場合、検出電圧を低電
圧に変換して真空電磁接触器制御回路１３へ直接入力す
ることが可能となり、回路を簡略化することができる。
なお、他の部分の構成と作用は第１実施例と同様である
ので、その説明は省略する。FIG. 2 shows a second embodiment of the present invention. In the first embodiment, the voltage between both ends of the power switch 1 is detected by the voltage dividing resistors 10 and 11, but instead, a PT (instrument transformer) 14 is used as shown in FIG. You can also. When the PT is used, the detection voltage can be converted to a low voltage and directly input to the vacuum electromagnetic contactor control circuit 13, and the circuit can be simplified.
The configuration and operation of the other parts are the same as in the first embodiment, and a description thereof will be omitted.
【００１５】図３に本発明の第３実施例を示す。前記第
２実施例では、巻線構造のＰＴを用いたが、図３に示す
ように、光ＰＴ１５を用いても同様の効果を奏すること
ができる。光ＰＴを用いた場合、電路と検出回路間の絶
縁を容易にとることができる。なお、他の部分の構成と
作用は第１実施例と同様であるので、その説明は省略す
る。FIG. 3 shows a third embodiment of the present invention. In the second embodiment, the PT having the winding structure is used. However, as shown in FIG. 3, the same effect can be obtained by using the optical PT15. When the optical PT is used, insulation between the electric circuit and the detection circuit can be easily obtained. The configuration and operation of the other parts are the same as in the first embodiment, and a description thereof will be omitted.
【００１６】[0016]
【発明の効果】以上述べたところから明らかなように、
本発明の開閉器によれば、電力スイッチの両端間電圧を
電力スイッチに並列接続した電圧検出手段によって取り
出し、この検出電圧が予め定めた値を越えた時に電磁接
触器を自動的に開放するようにしたので、何らかの原因
により電力スイッチに過電圧が印加されても電路を自動
的に遮断することができ、電力スイッチに並列接続され
た酸化亜鉛形避雷器の過電圧による破壊を防止すること
ができる。As is apparent from the above description,
According to the switch of the present invention, the voltage between both ends of the power switch is taken out by the voltage detecting means connected in parallel to the power switch, and the electromagnetic contactor is automatically opened when the detected voltage exceeds a predetermined value. Therefore, even if an overvoltage is applied to the power switch for some reason, the electric circuit can be automatically cut off, and the zinc oxide surge arrester connected in parallel to the power switch can be prevented from being damaged by the overvoltage.
【図１】本発明になる開閉器の第１実施例の回路図であ
る。FIG. 1 is a circuit diagram of a first embodiment of a switch according to the present invention.
【図２】本発明になる開閉器の第２実施例の回路図であ
る。FIG. 2 is a circuit diagram of a second embodiment of the switch according to the present invention.
【図３】本発明になる開閉器の第３実施例の回路図であ
る。FIG. 3 is a circuit diagram of a third embodiment of the switch according to the present invention.
【図４】従来の開閉器の回路図である。FIG. 4 is a circuit diagram of a conventional switch.
１ 電力スイッチ ２Ａ 真空電磁接触器 ３ 酸化亜鉛形避雷器 ４Ａ 静止形開閉器 ５ 負荷電圧検出用ＰＴ ６ 電路接続ケーブル ７ 電圧低下検出回路 ８ オン信号発生回路 ９Ａ 制御装置 １０、１１ 分圧抵抗 １２ 過電圧検出回路 １３ 真空電磁接触器制御回路 １４ 過電圧検出用ＰＴ １５ 過電圧検出用光ＰＴ DESCRIPTION OF SYMBOLS 1 Power switch 2A Vacuum electromagnetic contactor 3 Zinc oxide lightning arrester 4A Static switch 5 PT for load voltage detection 6 Circuit connection cable 7 Voltage drop detection circuit 8 ON signal generation circuit 9A Control device 10, 11 Voltage dividing resistor 12 Overvoltage detection Circuit 13 Vacuum electromagnetic contactor control circuit 14 PT for overvoltage detection 15 Light PT for overvoltage detection
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H01T 15/00 H02H 3/08 - 3/253 H02H 7/00 H02H 7/10 - 7/20 H03K 17/00 - 17/70Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) H01T 15/00 H02H 3/08-3/253 H02H 7/00 H02H 7/10-7/20 H03K 17/00-17 / 70
Claims (1)
力スイッチに並列接続された酸化亜鉛形避雷器と、前記
電力スイッチに直列接続された電磁接触器とを備えた開
閉器において、 前記電力スイッチに並列接続され、該電力スイッチの両
端間の電圧を検出する電圧検出手段と、前記電圧検出手段の何れかの検出電圧が予め定めた値を
越えた時に、各相に設けられた前記電磁接触器を自動的
に開放する制御手段とを具備する ことを特徴とする開閉
器。1. A switch comprising: a power switch provided in each phase; a zinc oxide arrester connected in parallel to the power switch; and an electromagnetic contactor connected in series to the power switch. connected in parallel to the switch, voltage detection means for detecting a voltage between both ends of the power switch, the value one of the detection voltage is predetermined for the voltage detecting means
Automatically activates the magnetic contactor provided for each phase when it exceeds
Switch, characterized in that and a control means for opening the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4219256A JP2806162B2 (en) | 1992-08-18 | 1992-08-18 | Switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4219256A JP2806162B2 (en) | 1992-08-18 | 1992-08-18 | Switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0670454A JPH0670454A (en) | 1994-03-11 |
| JP2806162B2 true JP2806162B2 (en) | 1998-09-30 |
Family
ID=16732673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4219256A Expired - Fee Related JP2806162B2 (en) | 1992-08-18 | 1992-08-18 | Switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2806162B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102006121B1 (en) * | 2012-08-31 | 2019-08-01 | 한국전력공사 | Apparatus for suppressing overvoltage in single point bounded section of underground transmission system |
| CN103779840B (en) * | 2012-10-18 | 2017-06-23 | 中国电力科学研究院 | Connection cutting system |
| CN110011291B (en) * | 2019-05-14 | 2021-06-18 | 云南电网有限责任公司电力科学研究院 | Overvoltage protection circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01283719A (en) * | 1988-05-09 | 1989-11-15 | Mitsubishi Electric Corp | Remote operation type circuit breaker |
| JPH0487284A (en) * | 1990-07-30 | 1992-03-19 | Mitsubishi Electric Corp | Lightning arrester separator |
-
1992
- 1992-08-18 JP JP4219256A patent/JP2806162B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0670454A (en) | 1994-03-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |