JPH0770275B2 - Current limiting and disconnection - Google Patents
Current limiting and disconnectionInfo
- Publication number
- JPH0770275B2 JPH0770275B2 JP62167800A JP16780087A JPH0770275B2 JP H0770275 B2 JPH0770275 B2 JP H0770275B2 JP 62167800 A JP62167800 A JP 62167800A JP 16780087 A JP16780087 A JP 16780087A JP H0770275 B2 JPH0770275 B2 JP H0770275B2
- Authority
- JP
- Japan
- Prior art keywords
- switch
- superconductor
- current limiting
- circuit
- series
- 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
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Keying Circuit Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、超電導体を用いた限流しや断器、特にアー
クの発生をおさえた限流しや断器に関するものである。Description: TECHNICAL FIELD The present invention relates to a current limiting device and a circuit breaker using a superconductor, and more particularly to a current limiting device and a circuit breaker that suppress arc generation.
第３図は従来の限流素子付ノーヒユーズしや断器を示す
回路図である。図において、（１）はしや断器部の接
点、（２）は熱動引きはずし用バイメタル、（３）は電
磁引きはずし用電磁石、（４）は永久ヒユーズであり、
これら要素（１）〜（４）は直列に接続されている。
（５）は永久ヒユーズ（４）に並列に接続された抵抗で
ある。なお、要素（１）〜（３）はNFB（ノーヒユーズ
しや断器）部である。FIG. 3 is a circuit diagram showing a conventional fuse and breaker with a current limiting element. In the figure, (1) is a contact of a chopstick or a breaker, (2) is a bimetal for thermal tripping, (3) is an electromagnet for electromagnetic tripping, and (4) is a permanent fuse.
These elements (1) to (4) are connected in series.
(5) is a resistor connected in parallel with the permanent fuse (4). The elements (1) to (3) are NFB (no-use and breaker) parts.
従来の限流しや断器は上述したように構成されており、
短絡電流が流れるとこれを永久ヒユーズ（４）で限流し
た後、並列抵抗（５）を流れる電流によりNFB部の電磁
石（３）が働らかされ、もつてトグルリンク機構（図示
しない）を動かして接点（１）を開かせる。Conventional current limiting and circuit breakers are configured as described above,
When a short-circuit current flows, it is limited by a permanent fuse (4), and then the electromagnet (3) of the NFB section is activated by the current flowing through the parallel resistance (5), which causes a toggle link mechanism (not shown). Move to open contact (1).
永久ヒユーズ（４）の替わりに超電導体を用いた限流し
や断器では第４図に示すようにスイツチ（11）例えばし
や断器、開閉器またはオープニングスイツチと超電導体
（12）が直列に接続された上で、この超電導（12）にコ
イル（13）が巻かれている。As shown in Fig. 4, a switch (11) such as a breaker, switch, switch or opening switch and a superconductor (12) are connected in series with a current limiter or a breaker using a superconductor instead of the permanent fuse (4). After being connected, a coil (13) is wound around this superconducting (12).
超電導体（12）を用いた従来の限流しや断器では、コイ
ル（13）に電流を流し、超電導体（12）の超電導状態を
少なくとも一部破壊して限流した後、スイツチ（11）を
開極して電流をしや断する。In the conventional current limiter and breaker using the superconductor (12), a current is passed through the coil (13) to at least partially destroy the superconducting state of the superconductor (12) to limit the current, and then the switch (11). To open and disconnect the current.
従来の限流しや断器では、電流しや断時にスイツチ（1
1）の接点間にアークが発生し、接点を荒らすという問
題点があつた。With the conventional current limiting and disconnecting switch, the switch (1
There was a problem that an arc was generated between the contacts in 1) and the contacts were damaged.
この発明は、上述したような問題点を解決するためにな
されたもので、電流しや断時のアークの発生をおさえ、
接点の損傷や消耗を小さくでき、しかも通常時の電力損
失を小さくできる限流しや断器を得ることを目的とす
る。The present invention has been made to solve the above-mentioned problems, and suppresses the generation of an arc at the time of breaking or applying a current,
It is an object of the present invention to obtain a current limiting device and a circuit breaker which can reduce the damage and wear of the contacts and also reduce the power loss in the normal state.
この発明に係る限流しや断器は、第１のスイツチと超電
導体から成る直列回路に、第２のスイツチと抵抗、リア
クトルおよびコンデンサのうち少なくとも１つとから成
る直列回路を並列に接続したものである。A current limiting device and a circuit breaker according to the present invention are ones in which a series circuit including a first switch and a superconductor is connected in parallel with a series circuit including a second switch and at least one of a resistor, a reactor and a capacitor. is there.
この発明においては、主回路電流を一旦転流させ、転流
回路で電流しや断を行なうことにより主回路中の第１の
スイツチの接点間でのアークの発生をおさえる。In the present invention, the main circuit current is temporarily commutated, and the commutation circuit is used to turn on and off the current, thereby suppressing generation of an arc between the contacts of the first switch in the main circuit.
以下、この発明の一実施例を添付図面について説明す
る。An embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図はこの発明の一実施例を示す回路図であり、図に
おいて（11），（12），（13）は第４図について説明し
たそれぞれスイツチ（以下、第１のスイツチと云
う。）、超電導体、コイルである。（21）は第２のスイ
ツチ例えばしや断器や開閉器、（22）はこの第２のスイ
ツチ（21）に直列接続された抵抗、そして（23）はこの
抵抗（22）に直列接続されたリアクトルである。第１の
スイツチ（11）と超電導体（12）から成る直列回路は、
第２のスイツチ（21）と抵抗（22）とリアクトル（23）
から成る直列回路と並列に接続されている。FIG. 1 is a circuit diagram showing an embodiment of the present invention. In the figure, (11), (12) and (13) are the respective switches described below with reference to FIG. 4 (hereinafter referred to as the first switch). , Superconductors, coils. (21) is a second switch such as a breaker or switch, (22) is a resistor connected in series with this second switch (21), and (23) is connected in series with this resistor (22). It is a reactor. The series circuit consisting of the first switch (11) and the superconductor (12) is
Second switch (21), resistance (22) and reactor (23)
Are connected in parallel with the series circuit consisting of.
第２図は第１のスイツチ（11）と第２のスイツチ（21）
の開極のタイミングを示す図である。FIG. 2 shows the first switch (11) and the second switch (21).
It is a figure which shows the timing of the contact opening.
通常、電流は第１のスイツチ（11）を介し、超電導体
（12）を通つて流れている。しや断を行なう場合には、
コイル（13）に電流を流し、超電導体（12）の超電導状
態を破壊して限流を行ない、第２のスイツチ（21）を含
む回路に転流すると同時に第１のスイツチ（11）を開極
する。その後、第２のスイツチ（21）を開極し、しや断
を行なう。Normally, the current is flowing through the first switch (11) and through the superconductor (12). When making a cut or
A current is passed through the coil (13) to destroy the superconducting state of the superconductor (12) to limit the current, and commutate to a circuit including the second switch (21) and at the same time open the first switch (11). Polarize. After that, the second switch (21) is opened to cut or cut.
なお、第１図には、第２のスイツチ（21）と直列に抵抗
（22）およびリアクトル（23）を接続した例を示した
が、第２のスイツチ（21）と直列に抵抗（22）、リアク
トル（23）およびコンデンサ（図示しない）のうち少な
くとも一つを接続すれば良い。また、第１のスイツチ
（11）と第２のスイツチ（21）は駆動装置（図示しな
い）を共有することができる。Although FIG. 1 shows an example in which the resistor (22) and the reactor (23) are connected in series with the second switch (21), the resistor (22) is connected in series with the second switch (21). It is sufficient to connect at least one of the reactor (23) and the capacitor (not shown). Further, the first switch (11) and the second switch (21) can share a driving device (not shown).
以上、詳述したように、この発明は第１のスイツチと超
電導体から成る直列回路に、第２のスイツチと抵抗、リ
アクトルおよびコンデンサのうち少なくとも１つとから
成る直列回路を並列に接続したので、常時、電流の流れ
る回路中の第１のスイツチの接点間でのアークの発生を
おさえ、接点の損傷や消耗小さくでき、また通常時の電
力損失を小さくできる効果が得られる。As described above in detail, according to the present invention, the series circuit including the first switch and the superconductor is connected in parallel to the series circuit including the second switch and at least one of the resistor, the reactor and the capacitor. It is possible to suppress the occurrence of an arc between the contacts of the first switch in the circuit in which the current flows at all times, to reduce the damage and wear of the contacts, and to reduce the power loss in normal times.
第１図はこの発明の一実施例を示す回路図、第２図は第
１図中のスイツチの動作タイミングを示す図、第３図は
従来の限流しや断器を示す回路図、第４図は超電導体を
用いた従来の限流しや断器を示す回路図である。 図において、（11）は第１のスイツチ、（12）は超電導
体、（13）はコイル、（21）は第２のスイツチ、（22）
は抵抗、（23）はリアクトルである。 なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the operation timing of the switch in FIG. 1, FIG. 3 is a circuit diagram showing a conventional current limiting circuit and a circuit breaker, and FIG. The figure is a circuit diagram showing a conventional current limiting and disconnecting device using a superconductor. In the figure, (11) is the first switch, (12) is the superconductor, (13) is the coil, (21) is the second switch, and (22).
Is resistance and (23) is a reactor. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (2)
し、この超電導体にその超電導状態を少なくとも一部破
壊するためのコイルを設け、更に第２のスイツチと抵
抗、リアクトルおよびコンデンサのうち少なくとも一つ
とを直列に接続した上で、前記第１のスイッチと前記超
電導体から成る直列回路と並列に接続したことを特徴と
する限流しや断器。1. A first switch and a superconductor are connected in series, a coil for breaking at least a part of the superconducting state is provided in the superconductor, and a second switch, a resistor, a reactor and a capacitor are provided. A current limiting device or a circuit breaker, characterized in that at least one of them is connected in series and then connected in parallel with a series circuit composed of the first switch and the superconductor.
置を共有することを特徴とする特許請求の範囲第１項記
載の限流しや断器。2. The current limiting device and the circuit breaker according to claim 1, wherein the first switch and the second switch share a driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62167800A JPH0770275B2 (en) | 1987-07-07 | 1987-07-07 | Current limiting and disconnection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62167800A JPH0770275B2 (en) | 1987-07-07 | 1987-07-07 | Current limiting and disconnection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6412438A JPS6412438A (en) | 1989-01-17 |
| JPH0770275B2 true JPH0770275B2 (en) | 1995-07-31 |
Family
ID=15856340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62167800A Expired - Lifetime JPH0770275B2 (en) | 1987-07-07 | 1987-07-07 | Current limiting and disconnection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0770275B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04307908A (en) * | 1991-04-05 | 1992-10-30 | Takaoka Electric Mfg Co Ltd | Current limiter |
| DE19756624A1 (en) * | 1997-12-19 | 1999-07-01 | Abb Research Ltd | Overcurrent limiting device has series circuit of superconductor and switch in parallel with inductive impedance comprising choke coil and superconductor arranged outside choke coil |
| KR100763163B1 (en) * | 2005-12-02 | 2007-10-08 | 엘에스산전 주식회사 | Superconducting fault current limiting system using reclosing scheme |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533579A (en) * | 1978-09-01 | 1980-03-08 | Matsushita Electric Ind Co Ltd | Air conditioner |
-
1987
- 1987-07-07 JP JP62167800A patent/JPH0770275B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533579A (en) * | 1978-09-01 | 1980-03-08 | Matsushita Electric Ind Co Ltd | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6412438A (en) | 1989-01-17 |
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