JPH079565Y2 - Overvoltage protection circuit device for three-phase AC motor - Google Patents
Overvoltage protection circuit device for three-phase AC motorInfo
- Publication number
- JPH079565Y2 JPH079565Y2 JP4384293U JP4384293U JPH079565Y2 JP H079565 Y2 JPH079565 Y2 JP H079565Y2 JP 4384293 U JP4384293 U JP 4384293U JP 4384293 U JP4384293 U JP 4384293U JP H079565 Y2 JPH079565 Y2 JP H079565Y2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- motor
- circuit device
- overvoltage protection
- protection circuit
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Motor And Converter Starters (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、真空開閉器によって開
閉可能な三相交流電動機を過電圧から保護する回路装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit device for protecting a three-phase AC motor that can be opened and closed by a vacuum switch from overvoltage.
【０００２】[0002]
【従来の技術】抵抗とコンデンサとの並列回路に抵抗を
直列接続したアームを有する星形回路を給電線に接続し
た三相交流電動機の過電圧保護回路装置（「シーメンス
・ベトリープスアンライトウング、フュア、ベルクバウ
シュッツ（Siemens-Betriebsanleitung fuer Bergbausc
huetz)」３ＴＬ３、第３ページ、第３図参照）において
は、過電圧を防止するため、使用するコンデンサがかな
り高い尖頭電圧値に耐えるものでなければならない。2. Description of the Related Art An overvoltage protection circuit device for a three-phase AC motor in which a star-shaped circuit having an arm in which a resistor and a capacitor are connected in series to a parallel circuit is connected to a power supply line (see "Siemens-Betrieps Unlight Wing, Fuhr , Bergbausch (Siemens-Betriebsanleitung fuer Bergbausc
huetz) ”3TL3, page 3, FIG. 3), the capacitors used must withstand fairly high peak voltage values in order to prevent overvoltage.
【０００３】真空開閉器における過電圧を防止するため
真空開閉器と可飽和リアクトルとの直列回路に補助開閉
器とバリスタとの直列回路を並列接続することは従来も
行われている（ドイツ連邦共和国特許出願公告第２０２
３８７２号明細書参照）が、可飽和リアクトルにおける
電力損失が大きく、大電流に対して装置の外形寸法も大
きくなるという欠点がある。In order to prevent an overvoltage in the vacuum switch, it is a conventional practice to connect the series circuit of the vacuum switch and the saturable reactor in parallel with the series circuit of the auxiliary switch and the varistor (German Patent). Application Publication No. 202
However, there is a drawback in that the power loss in the saturable reactor is large and the external dimensions of the device are large for a large current.
【０００４】[0004]
【考案が解決しようとする課題】本考案の目的は、低コ
ストの構成部品で組み立てることのできる過電圧保護回
路装置を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide an overvoltage protection circuit device which can be assembled with low cost components.
【０００５】[0005]
【課題を解決するための手段】上述の目的を達成するた
め、本考案においては、三相交流電動機を真空開閉器を
介して電源に接続し、抵抗とコンデンサと非線形抵抗と
の並列回路に抵抗を直列接続したアームを有する星形回
路を真空開閉器の三相交流電動機接続側に接続する。In order to achieve the above object, in the present invention, a three-phase AC motor is connected to a power source through a vacuum switch, and a resistor, a capacitor, and a nonlinear resistor are connected in parallel to a resistor. A star circuit having arms connected in series is connected to the three-phase AC motor connection side of the vacuum switch.
【０００６】非線形抵抗は特にバリスタで形成すると有
利である。The non-linear resistance is particularly advantageous when it is formed by a varistor.
【０００７】[0007]
【実施例】次に図面に示す実施例について本考案をさら
に詳細に説明する。The present invention will be described in more detail with reference to the embodiments shown in the drawings.
【０００８】電動機１１は三相交流電源の相１、２、３
に電動機１１の接続端子８、９、１０、三極真空開閉器
４および導線５、６、７を介して接続されている。電動
機１１の接続端子８、９、１０には星形回路１２が接続
されている。個々の星形アーム１３は抵抗１５、コンデ
ンサ１６およびバリスタ１７の並列回路と抵抗１４との
直列回路からなっている。The motor 11 is a three-phase AC power supply having phases 1, 2, 3
To the electric motor 11 via connection terminals 8, 9 and 10, a three-pole vacuum switch 4 and conductors 5, 6 and 7. A star circuit 12 is connected to the connection terminals 8, 9, 10 of the electric motor 11. Each star-shaped arm 13 is composed of a resistor 15, a capacitor 16, a varistor 17 in parallel, and a resistor 14 in series.
【０００９】バリスタ１７を使用することにより、例え
ば同じ大きさの過電圧が発生した場合に従来技術に比べ
てコンデンサにおける尖頭電圧値を低減させることがで
き、その結果としてコンデンサ１６の寸法も半分になる
ので、バリスタ１７のためのコスト増大がほとんど問題
にならない。By using the varistor 17, for example, when an overvoltage of the same magnitude occurs, the peak voltage value in the capacitor can be reduced as compared with the prior art, and as a result, the size of the capacitor 16 is halved. Therefore, the increase in cost for the varistor 17 does not pose a problem.
【００１０】[0010]
【考案の効果】本考案によれば、非線形抵抗を用いるこ
とにより、過電圧を防止するための回路装置に要するコ
ストとスペースとを著しく節減することができる。According to the present invention, by using the non-linear resistance, the cost and space required for the circuit device for preventing overvoltage can be significantly reduced.
【図１】本考案の実施例の接続図である。FIG. 1 is a connection diagram of an embodiment of the present invention.
１、２、３ 三相交流電源の相 ４ 真空開閉器 ５、６、７ 導線 ８、９、１０ 接続端子 １１ 電動機 １２ 星形回路 １３ 星形アーム １４ 抵抗 １５ 抵抗 １６ コンデンサ １７ 非線形抵抗（バリスタ） 1, 2, 3 Phases of three-phase AC power supply 4 Vacuum switch 5, 6, 7 Conductor 8, 9, 10 Connection terminal 11 Motor 12 Star circuit 13 Star arm 14 Resistor 15 Resistor 16 Capacitor 17 Nonlinear resistor (varistor)
フロントページの続き (56)参考文献 特開 昭58−49041（ＪＰ，Ａ) 実開 昭55−43328（ＪＰ，Ｕ) 実開 昭55−43329（ＪＰ，Ｕ) 特公 昭50−40789（ＪＰ，Ｂ１)Continuation of the front page (56) Reference JP-A-58-49041 (JP, A) Actually opened 55-43328 (JP, U) Actually opened 55-43329 (JP, U) JP-B 50-40789 (JP , B1)
Claims (3)
源に接続し、抵抗とコンデンサと非線形抵抗との並列回
路に抵抗を直列接続したアームを有する星形回路を真空
開閉器の三相交流電動機接続側に接続したことを特徴と
する三相交流電動機の過電圧保護回路装置。1. A three-phase AC voltage machine is connected to a power source via a vacuum switch, and a star-shaped circuit having an arm in which a resistor, a capacitor and a non-linear resistor are connected in series to a parallel circuit is connected to the vacuum switch. An overvoltage protection circuit device for a three-phase AC motor, characterized in that it is connected to the connection side of the phase AC motor.
とする請求項１記載の過電圧保護回路装置。2. The overvoltage protection circuit device according to claim 1, wherein the non-linear resistance is a varistor.
成部品として形成したことを特徴とする請求項１記載の
過電圧保護回路装置。3. The overvoltage protection circuit device according to claim 1, wherein the star circuit is formed as an integrated component of a vacuum switch.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3410364.3 | 1984-03-21 | ||
| DE19843410364 DE3410364A1 (en) | 1984-03-21 | 1984-03-21 | Circuit arrangement for the protection of three-phase motors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0677441U JPH0677441U (en) | 1994-10-28 |
| JPH079565Y2 true JPH079565Y2 (en) | 1995-03-06 |
Family
ID=6231188
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5625385A Pending JPS60213222A (en) | 1984-03-21 | 1985-03-20 | Overvoltage protecting circuit device of 3-phase ac motor |
| JP4384293U Expired - Lifetime JPH079565Y2 (en) | 1984-03-21 | 1993-07-16 | Overvoltage protection circuit device for three-phase AC motor |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5625385A Pending JPS60213222A (en) | 1984-03-21 | 1985-03-20 | Overvoltage protecting circuit device of 3-phase ac motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (2) | JPS60213222A (en) |
| DE (1) | DE3410364A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4204559A1 (en) * | 1992-02-13 | 1993-08-19 | Slamecka Ernst | Limitation of switching voltage on connecting inductive load e.g. compensation reactor coil in AC loop - connecting voltage limiter during high voltage periods and disconnecting during stationary operation of load |
| DE19817231C1 (en) * | 1998-04-17 | 1999-12-02 | Siemens Ag | Interference suppression module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2023872C3 (en) * | 1970-05-15 | 1974-02-07 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Electrical switchgear |
| JPS5379242A (en) * | 1976-12-22 | 1978-07-13 | Fuji Electric Co Ltd | Enclosed-type housing equipment |
-
1984
- 1984-03-21 DE DE19843410364 patent/DE3410364A1/en active Granted
-
1985
- 1985-03-20 JP JP5625385A patent/JPS60213222A/en active Pending
-
1993
- 1993-07-16 JP JP4384293U patent/JPH079565Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE3410364C2 (en) | 1992-10-08 |
| JPS60213222A (en) | 1985-10-25 |
| JPH0677441U (en) | 1994-10-28 |
| DE3410364A1 (en) | 1985-10-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19950822 |