JPH0479444B2 - - Google Patents
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- Publication number
- JPH0479444B2 JPH0479444B2 JP21429985A JP21429985A JPH0479444B2 JP H0479444 B2 JPH0479444 B2 JP H0479444B2 JP 21429985 A JP21429985 A JP 21429985A JP 21429985 A JP21429985 A JP 21429985A JP H0479444 B2 JPH0479444 B2 JP H0479444B2
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- Prior art keywords
- circuit
- tripping
- current
- instantaneous
- time
- 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.)
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- 238000001514 detection method Methods 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- Keying Circuit Devices (AREA)
- Breakers (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、系統の保護協調をとりやすくする
ために限時引外し特性および瞬時引外し特性を持
たせたしや断器の引外し装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tripping device for a drain or disconnection having time-limited tripping characteristics and instantaneous tripping characteristics in order to facilitate protection coordination in a power system. .
送・配電系統の分岐回路に短絡事故などが発生
した場合、全系統の停電を避けるため、この分岐
回路に挿入されたしや断器だけを速やかにしや断
して主幹回路のしや断器は、分岐回路のしや断器
のしや断動作時間の間この短絡電流等の大電流に
耐えて閉路状態を保つ必要がある。
If a short circuit occurs in a branch circuit of a power transmission/distribution system, in order to avoid a power outage for the entire system, immediately disconnect only the disconnector inserted in this branch circuit and remove the disconnector from the main circuit. It is necessary to withstand a large current such as this short circuit current and maintain a closed circuit state during the branch circuit or disconnection operation time.
このため、従来は、主幹回路しや断器に、分岐
回路しや断器の瞬時引外し領域で動作する短時限
の限時特性をもつた短限時引外し回路を新たに設
けるとともに瞬時引外しの動作電流値を大きくし
ていた。 For this reason, conventionally, a new short-time tripping circuit with a short-time characteristic that operates in the instantaneous tripping region of the branch circuit or disconnector was installed in the main circuit or disconnection, and the The operating current value was increased.
これにより主幹回路と分岐回路のしや断器間の
選択しや断の協調が十分にとれる。しかしなが
ら、回路しや断器は、一般に短絡事故の生じてい
るところへ投入する場合は、開閉機構の接触子の
はね返り等により、投入された状態で短絡事故が
生じた場合に較べ、電流耐量が低下するため、選
択しや断協調のために瞬時引外しの動作電流値が
高められていると、その分だけ回路しや断器の開
閉機構の電流耐量をさらに高める必要があり、そ
のために開閉機構が大形化する欠点が生じる。 This allows for sufficient coordination in selection and disconnection between the main circuit and branch circuits. However, when a circuit breaker or disconnector is inserted into an area where a short circuit has occurred, the current withstand capacity is generally lower than when a short circuit occurs while the switch is closed due to bounce of the contacts of the opening/closing mechanism. Therefore, if the operating current value of instantaneous tripping is increased for selection or disconnection coordination, it is necessary to further increase the current withstand capacity of the circuit or disconnection opening/closing mechanism. This has the disadvantage that the mechanism becomes larger.
この発明は、上記従来装置の欠点を解消するた
め、開閉機構の電流耐量を高めることの必要がな
い回路しや断器の引外し装置を提供することを目
的とする。
SUMMARY OF THE INVENTION In order to eliminate the drawbacks of the conventional devices described above, it is an object of the present invention to provide a tripping device for circuits and disconnectors that does not require increasing the current withstand capacity of the opening/closing mechanism.
〔発明の要点〕
この発明は、主回路の電流を検出する電流検出
回路と、この電流検出回路の検出出力のレベルが
予め設定された過電流レベルを超えると限時動作
して引外し信号を発生する限時引外し回路と、前
記検出出力レベルが予め設定された短絡電流レベ
ルを超えると瞬時に引外し信号を発生する瞬時引
外し回路と、前記限時引外し回路および瞬時引外
し回路の引外し信号を受けて動作する引外し機構
と、この引外し機構により作動されて主回路を開
放する開閉機構と、この開閉機構が投入されたと
き一時的に所定時間だけ前記瞬時引外し回路の設
定レベルを低く設定する設定変更手段とを設ける
ことにより、投入時に、一時的に瞬時引外し動作
の動作電流値が引下げられるので開閉機構の電流
耐量を高める必要がなく、これを低く抑えること
ができるようになる。[Summary of the Invention] The present invention includes a current detection circuit that detects the current in the main circuit, and a current detection circuit that operates for a limited time and generates a trip signal when the detection output level of this current detection circuit exceeds a preset overcurrent level. an instantaneous tripping circuit that instantly generates a tripping signal when the detection output level exceeds a preset short circuit current level; and a tripping signal of the timed tripping circuit and the instantaneous tripping circuit. a tripping mechanism operated by the tripping mechanism; a switching mechanism operated by the tripping mechanism to open the main circuit; By providing a setting change means for setting a lower value, the operating current value of the instantaneous trip operation is temporarily lowered when the switch is turned on, so there is no need to increase the current withstand capacity of the opening/closing mechanism, and this can be kept low. Become.
第１図は、この発明の実施例を示すブロツク回
路図である。この図において、１，２および３は
３相の主回路の各相に挿入された電流検出用変流
器、４は変流器１〜３の出力から主回路の最大電
流を検出し、その電流値に比例した電圧の出力電
圧を発生する電流検出回路である。５および６は
それぞれ、電流検出回路４の出力電圧のレベルを
検出して、これがそれぞれ予め設定された長限時
しや断領域過電流の設定値およびこの過電流設定
値より高い短限時しや断領域の過電流の設定値に
達すると、それぞれ電流に応じた限時動作を行な
う長限時引外し回路８および一定の比較的に短い
限時動作を行なう短限時引外し回路９を作動させ
る長限時検出回路および短限時検出回路、７は電
流検出回路の出力電圧が瞬時しや断領域の過電流
設定値に達すると作動し、引外し信号を発生する
瞬時引外し回路である。この３つの引外し回路の
発生する引外し信号は、いずれもトリガ回路２２
を介して、主回路の開閉を行なう開閉機構１０の
引外しを行なう引外し機構２０のトリツプコイル
を駆動するサイリスタスイツチ２１のゲートに与
えられ、これをトリガする。
FIG. 1 is a block circuit diagram showing an embodiment of the present invention. In this figure, 1, 2, and 3 are current-detecting current transformers inserted in each phase of a three-phase main circuit, and 4 is a current detecting current transformer that detects the maximum current of the main circuit from the output of current transformers 1 to 3. This is a current detection circuit that generates an output voltage proportional to the current value. 5 and 6 respectively detect the level of the output voltage of the current detection circuit 4, and detect the level of the output voltage of the current detection circuit 4, respectively, and detect the preset long time period overcurrent setting value and the short time period period overcurrent value higher than the overcurrent setting value. A long time detection circuit that operates a long time tripping circuit 8 that performs a timed operation depending on the current and a short time tripping circuit 9 that performs a fixed relatively short timed operation when the set value of the overcurrent in the area is reached. and a short-time detection circuit, and 7 is an instantaneous tripping circuit that is activated and generates a tripping signal when the output voltage of the current detection circuit reaches an overcurrent set value in the instantaneous instantaneous failure region. The tripping signals generated by these three tripping circuits are all sent to the trigger circuit 22.
is applied to the gate of a thyristor switch 21 that drives a trip coil of a tripping mechanism 20 that trips the opening/closing mechanism 10 that opens and closes the main circuit, and triggers this.
瞬時引外し回路７には開閉機構１０に連動して
動作するスイツチ７１が付設され、これにより瞬
時引外し回路７の内部に設定された動作電流の設
定値の変更が指令される。 The instantaneous tripping circuit 7 is provided with a switch 71 that operates in conjunction with the opening/closing mechanism 10, and this commands a change in the set value of the operating current set inside the instantaneous tripping circuit 7.
第２図は、瞬時引外し回路７に付属する設定値
変更回路の実施例を示す。この図において第１図
と同一符号は同一物を示す。R1〜R3は抵抗、
ZD1〜ZD2はツエナーダイオード、Ｃはコンデン
サ、Tr1，Tr2はトランジスタ、RS0〜RS2は瞬時
引外し動作電流値を設定する設定抵抗である。瞬
時引外し回路７の基準入力端ISには、設定抵抗
RS0〜RS2とトランジスタT1，T2によつて構成さ
れた設定回路から設定電圧が加えられ、比較入力
端IPには第１図の電流検出回路４の出力電圧が
加えられる。 FIG. 2 shows an embodiment of a set value changing circuit attached to the instantaneous tripping circuit 7. As shown in FIG. In this figure, the same reference numerals as in FIG. 1 indicate the same parts. R1 to R3 are resistances,
ZD 1 to ZD 2 are Zener diodes, C is a capacitor, Tr 1 and Tr 2 are transistors, and RS 0 to RS 2 are setting resistors for setting the instantaneous tripping operating current value. The reference input terminal IS of the instantaneous tripping circuit 7 has a setting resistor.
A setting voltage is applied from a setting circuit constituted by RS 0 to RS 2 and transistors T 1 and T 2 , and an output voltage of the current detection circuit 4 shown in FIG. 1 is applied to the comparison input terminal IP.
この第２図の回路は、次のように動作する。 The circuit of FIG. 2 operates as follows.
開閉機構１０の投入に伴なつてこれと連動した
スイツチ７１が閉じる。これにより、抵抗R1，
R2を介してコンデンサＣが、抵抗R1，R2とコン
デンサＣによつて決まる時定数に従つて充電され
る。コンデンサＣの端子電圧VCがツエナーダイ
オードZD2のツエナー電圧VZ2に達するまでは、
ツエナーダイオードが不導通のため、トランジス
タT1がオフ、トランジスタT2がオンとなる。 As the opening/closing mechanism 10 is turned on, a switch 71 interlocked with the opening/closing mechanism 10 is closed. As a result, the resistance R 1 ,
Capacitor C is charged via R 2 according to a time constant determined by resistors R 1 , R 2 and capacitor C. Until the terminal voltage V C of the capacitor C reaches the Zener voltage V Z2 of the Zener diode ZD 2 ,
Since the Zener diode is non-conductive, transistor T 1 is turned off and transistor T 2 is turned on.
この状態では、設定抵抗RS0とRS2で決まる設
定電圧US3が瞬時引外し回路７に与えられる。こ
の設定電圧US3は、第３図における電流i3に対応
した値に選ばれている。 In this state, the set voltage U S3 determined by the set resistors RS 0 and RS 2 is applied to the instantaneous tripping circuit 7. This set voltage U S3 is selected to a value corresponding to the current i 3 in FIG. 3.
所定時間の後、コンデンサＣの端子電圧VCが
ツエナーダイオードZD2のツエナー電圧VZ2に達
すると、ツエナーダイオードZD2が導通し、トラ
ンジスタT1がオン、トランジスタT2がオフとな
る。これにより、今度は抵抗RS0とRS1で決まる
設定電圧US4が瞬時引外し回路７に与えられる。
この設定電圧US4は、第３図における電流i4に対
応した値に選ばれている。 After a predetermined time, when the terminal voltage V C of the capacitor C reaches the Zener voltage V Z2 of the Zener diode ZD 2 , the Zener diode ZD 2 becomes conductive, the transistor T 1 is turned on, and the transistor T 2 is turned off. As a result, the set voltage U S4 determined by the resistors RS 0 and RS 1 is now applied to the instantaneous tripping circuit 7 .
This set voltage U S4 is selected to a value corresponding to the current i 4 in FIG. 3.
このように第２図の回路は、開閉機構が投入さ
れたとき、一定時間の間だけ、瞬時引外し回路７
の設定電圧をUS3とし、その後、これにより大き
いUS4に変更するように動作する。瞬時引外し回
路７は、このように変更される設定電圧USと、
電流検出回路の出力電圧Viとを比較し、Vi＞US
となつたとき、引外し信号を発生し、トリガ回路
２２に与える。これにより、サイリスタスイツチ
２１が導通され引外し機構２０が駆動される。 In this way, the circuit shown in Fig. 2 is such that the instantaneous tripping circuit 7
The set voltage is set to U S3 , and then the voltage is changed to the larger U S4 . The instantaneous tripping circuit 7 uses the set voltage U S changed in this way,
Compare the output voltage V i of the current detection circuit and find that V i > U S
When this occurs, a tripping signal is generated and applied to the trigger circuit 22. As a result, the thyristor switch 21 becomes conductive and the tripping mechanism 20 is driven.
次に第１図に示した本発明の実施例による引外
し装置を備えたしや断器の動作を説明する。 Next, the operation of the shingle breaker equipped with the tripping device according to the embodiment of the present invention shown in FIG. 1 will be described.
この実施例による引外し装置は、第３図にＡで
示すような引外し特性を有する。この特性線にお
けるａ部分は長限時引外し回路８によつて決めら
れた長限時引外し領域、ｂ部分は、短限時引外し
回路９によつて決められた短限時引外し領域、ｃ
部分は瞬時引外し回路７によつて決められた瞬時
引外し領域である。長限時検出回路５の動作電流
設定値は第３図のi2に対応する値に、そして、短
限時検出回路６の動作電流設定値は、第３図のi3
に対応する値にそれぞれ設定されている。瞬時引
外し回路７の設定値は前記のとおり、開閉機構１
０の投入にしたがつてi3とi4に対応した値に変更
可能とされている。 The tripping device according to this embodiment has tripping characteristics as indicated by A in FIG. In this characteristic line, part a is the long time trip region determined by the long time trip circuit 8, part b is the short time trip region determined by the short time trip circuit 9, and c
This section is the instantaneous trip area determined by the instantaneous trip circuit 7. The operating current setting value of the long time detection circuit 5 is a value corresponding to i 2 in FIG. 3, and the operating current setting value of the short time detection circuit 6 is a value corresponding to i 3 in FIG. 3.
are set to the corresponding values. The setting value of the instantaneous tripping circuit 7 is as described above.
It is possible to change the values corresponding to i 3 and i 4 according to the input of 0.
開閉機構１０の投入された通常の状態において
は、瞬時引外し回路７の設定値は、電流i4に対応
する値に切換えられているので、この回路しや断
器は、第３図の特性線Ａの実線で示す特性線に従
つて動作する。すなわち、主回路の電流ｉが第３
図におけるi2を越える過負荷状態になると、長限
時検出回路５がこれを検出し、長限時引外し回路
８を作動させる。これにより、長限時引外し回路
８から負荷電流ｉの大きさに応じた時間遅れを持
つて、引外し信号が発生される。引外し信号が発
生されるとトリガ回路２２を介してサイリスタス
イツチ２１が導通され、引外しコイルが駆動され
て開閉機構１０の引外し（しや断）が行なわれ
る。 In the normal state in which the opening/closing mechanism 10 is closed, the set value of the instantaneous tripping circuit 7 is switched to a value corresponding to the current i4 , so that the circuit breaker has the characteristics shown in Fig. 3. It operates according to the characteristic line shown by the solid line A. In other words, the current i in the main circuit is
When the overload condition exceeds i2 in the figure, the long time detection circuit 5 detects this and activates the long time trip circuit 8. As a result, a tripping signal is generated from the long-time tripping circuit 8 with a time delay corresponding to the magnitude of the load current i. When the tripping signal is generated, the thyristor switch 21 is made conductive via the trigger circuit 22, the tripping coil is driven, and the opening/closing mechanism 10 is tripped.
負荷電流ｉがさらに過大となりi3を越えると、
短限時検出回路６がこれを検出し、短限時引外し
回路９を作動させる。短限時引外し回路９は、ほ
ぼ一定の短い時間遅れをおいて、引外し信号を発
生する。 When the load current i becomes even more excessive and exceeds i3 ,
The short time detection circuit 6 detects this and activates the short time trip circuit 9. The short time trip circuit 9 generates a trip signal after a short, substantially constant time delay.
主回路に短絡または地路のような事故が発生
し、主回路電流ｉが極めて過大となり、i4を越え
ると、瞬時引外し回路７がこれを検出し、ほとん
ど時間遅れなしに、引外し信号を発生し、サイリ
スタスイツチ２１を介して引外し機構２０を作動
させ、開閉機構１０を引外し、主回路をしや断す
る。 If an accident such as a short circuit or ground fault occurs in the main circuit and the main circuit current i becomes extremely excessive and exceeds i4 , the instantaneous tripping circuit 7 detects this and issues a tripping signal almost immediately. is generated, the tripping mechanism 20 is activated via the thyristor switch 21, the opening/closing mechanism 10 is tripped, and the main circuit is cut off.
しかして、開閉機構１０の投入時の初期におい
ては、第２図の回路の動作により、瞬時引外し回
路７の設定値が通常より小さいi3に対応する値に
設定される。このため、すでに短絡事故を生じて
いる回路にしや断器を投入した場合は、負荷電流
ｉがi3に達したところで瞬時引外し回路７が作動
し、瞬時引外しが行なわれるので、通常の場合よ
り小さい事故電流で瞬時引外しが行なわれ、回路
および回路しや断器が保護される。 Therefore, in the initial stage when the opening/closing mechanism 10 is turned on, the setting value of the instantaneous tripping circuit 7 is set to a value corresponding to i 3 which is smaller than normal due to the operation of the circuit shown in FIG. Therefore, if a circuit breaker is applied to a circuit where a short circuit has already occurred, the instantaneous tripping circuit 7 will be activated when the load current i reaches i3 , and instantaneous tripping will be performed. Instantaneous tripping occurs with a smaller fault current than in the case of a fault current, and the circuit and circuit breakers are protected.
このような本発明によるしや断器を第４図の主
幹回路しや断器CB0に使用し、分岐回路しや断器
CB1〜CB4に第３図の特性線Ｂで示すような普通
の引外し特性を有するしや断器を使用した配電系
統における協調動作を説明する。 Such a breaker according to the present invention is used for the main circuit breaker CB 0 in Fig. 4, and the branch circuit breaker CB 0 is used as a branch circuit breaker.
The cooperative operation in the power distribution system using the circuit breakers CB 1 to CB 4 having normal tripping characteristics as shown by the characteristic line B in FIG. 3 will be explained.
この配電系統において、主幹回路しや断器CB0
および分岐回路しや断器CB1〜CB4がともに投入
された状態で、Ｘ点で短絡事故が生じたときは分
岐回路しや断器CB1の電流が第３図のi2を越えた
ところでこの分岐回路しや断器CB1が引外されて
しや断する。このとき、主幹回路しや断器CB0の
瞬時引外し電流の設定値はi2よりははるかに大き
いi4に対応する値となつているので、この主幹回
路しや断器CB0は分岐回路しや断器CB1より早く
しや断することはなく、確実に分岐回路しや断器
CB1だけがしや断する。 In this distribution system, the main circuit and disconnection CB 0
If a short circuit occurs at point X with branch circuit breakers CB 1 to CB 4 both connected, the current in branch circuit break CB 1 exceeds i 2 in Figure 3. By the way, this branch circuit breaker CB 1 is tripped and disconnected. At this time, the set value of the instantaneous tripping current of main circuit breaker CB 0 corresponds to i 4 , which is much larger than i 2 , so this main circuit breaker CB 0 is used as a branch Will not break faster than circuit breakers CB 1 and will reliably close branch circuits and break breakers.
Only CB 1 breaks.
主幹回路しや断器CB0が過電流でしや断された
後、再び投入されたとき、Ｙ点で短絡事故が発生
している場合は、投入と同時に第２図の設定値変
更回路のスイツチ７１がオンし、コンデンサＣの
充電が開始し、その端子電圧が一定値に達するま
での投入から一定時間の間は、トランジスタT2
がオンするので、設定抵抗RS0とRS2から電流i3
に対応する値が瞬時引外し回路７の引外し電流設
定値として与えられている。このため、事故電流
が瞬時引外しの行なわれる通常の電流i4より小さ
いi3に達したところで瞬時引外し回路７が動作
し、開閉機構１０の引外しが行われる。 When the main circuit breaker CB 0 is turned on again after it has been cut off due to overcurrent, if a short circuit has occurred at point Y, the setting value change circuit shown in Figure 2 will be activated at the same time as the main circuit is turned on. The switch 71 is turned on, charging of the capacitor C starts, and the transistor T 2
turns on, so the current i 3 from the setting resistors RS 0 and RS 2
A value corresponding to is given as the tripping current setting value of the instantaneous tripping circuit 7. Therefore, when the fault current reaches i 3 which is smaller than the normal current i 4 at which instantaneous tripping is performed, the instantaneous tripping circuit 7 is activated and the opening/closing mechanism 10 is tripped.
投入時に短絡事故が発生していないときは、投
入後、一定時間後に、トランジスタT1がオンに
切り換わり、瞬時引外し回路７の引外し電流設定
値がi3に対応する値からi4に対応する値に切換え
られるので、その後は実線の特性線Ａ（第３図）
のような引外し特性を示すようになる。 If no short-circuit accident occurs at the time of application, transistor T1 is turned on after a certain period of time after application, and the tripping current setting value of instantaneous tripping circuit 7 changes from the value corresponding to i3 to i4 . Since it is switched to the corresponding value, the solid line characteristic line A (Figure 3)
It begins to exhibit tripping characteristics such as .
このように本発明によれば、しや断器の投入時
に一時的に瞬時引外し回路の引外し電流設定値が
通常の値より小さい値に変更されるので、回路し
や断器の投入時におけるしや断電流が小さくな
る。そして、このときは、主幹回路しや断器と分
岐回路しや断器との選択性はなくなるが全系統の
投入時であるため、主幹回路しや断器がしや断さ
れても、特に支障はないのである。 As described above, according to the present invention, the tripping current setting value of the instantaneous tripping circuit is temporarily changed to a value smaller than the normal value when the circuit breaker is turned on. The shear cut-off current becomes smaller. At this time, there is no selectivity between the main circuit/disconnector and the branch circuit/disconnector, but since the entire system is turned on, even if the main circuit/disconnector is suddenly disconnected, There is no problem.
本発明による引外し装置を備えたしや断器を、
送配置系統の主幹回路しや断器として使用する
と、通常の投入状態においては、瞬時引外し電流
の設定値が大きくなるため、分岐回路しや断器と
の選択しや断協調範囲を大きくできるため確実な
選択しや断が実行可能となり、そして、それにも
かかわらず、投入時に一時的に引外し電流の設定
値を変更して小さくするので、投入時のしや断器
の電流耐量が小さくなり、小形にできる効果が得
られるのである。
A breaker equipped with a tripping device according to the present invention,
When used as a main circuit or disconnector in a transmission system, the instantaneous tripping current setting value becomes large under normal closing conditions, so the range of selection and disconnection coordination with branch circuits or disconnectors can be expanded. Therefore, reliable selection and disconnection can be carried out, and in spite of this, the set value of the tripping current is temporarily changed and made smaller at the time of closing, so the current withstand capacity of the tripping current is small at the time of closing. Therefore, the effect of making it smaller can be obtained.
第１図は本発明の実施例を示すブロツク構成
図、第２図は本発明に使用する設定値変更回路の
実施例を示す電気回路図、第３図は本発明の動作
説明に用いる特性線図、第４図は配電系統図であ
る。
１，２，３：変流器、４：電流検出回路、７：
瞬時引外し回路、８：長限時引外し回路、９：短
限時引外し回路、１０：しや断器、２０：引外し
機構、２１：サイリスタスイツチ、７１：スイツ
チ。
Fig. 1 is a block configuration diagram showing an embodiment of the present invention, Fig. 2 is an electric circuit diagram showing an embodiment of a set value changing circuit used in the present invention, and Fig. 3 is a characteristic line used to explain the operation of the present invention. Figure 4 is a power distribution system diagram. 1, 2, 3: Current transformer, 4: Current detection circuit, 7:
Instantaneous tripping circuit, 8: Long time tripping circuit, 9: Short time tripping circuit, 10: Shrink breaker, 20: Tripping mechanism, 21: Thyristor switch, 71: Switch.
Claims (1)
の電流検出回路の検出出力のレベルが予め設定さ
れた過電流レベルを超えるとそのレベルに応じた
時間だけ限時して引外し信号を発生する限時引外
し回路と、前記検出出力のレベルが予め設定され
た短絡電流レベルを超えると瞬時に引外し信号を
発生する瞬時引外し回路と、前記限時引外し回路
および瞬時引外し回路の引外し信号を受けて動作
する引外し機構と、この引外し機構により作動さ
れて主回路を開放する開閉機構と、この開閉機構
が投入されたとき一時的に所定時間だけ前記瞬時
引外し回路の設定レベルを低く設定する設定変更
手段を備えたことを特徴とするしや断器の引外し
装置。1 A current detection circuit that detects the current in the main circuit, and a time limit that generates a trip signal for a time period corresponding to the overcurrent level when the level of the detection output of this current detection circuit exceeds a preset overcurrent level. a tripping circuit; an instantaneous tripping circuit that instantly generates a tripping signal when the level of the detection output exceeds a preset short circuit current level; and a tripping signal of the time-limited tripping circuit and the instantaneous tripping circuit. a tripping mechanism that operates in response to the tripping mechanism; a switching mechanism that is activated by the tripping mechanism to open the main circuit; 1. A tripping device for a breaker, characterized by comprising a setting change means for setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21429985A JPS6276117A (en) | 1985-09-27 | 1985-09-27 | Tripping device for circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21429985A JPS6276117A (en) | 1985-09-27 | 1985-09-27 | Tripping device for circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6276117A JPS6276117A (en) | 1987-04-08 |
| JPH0479444B2 true JPH0479444B2 (en) | 1992-12-16 |
Family
ID=16653432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21429985A Granted JPS6276117A (en) | 1985-09-27 | 1985-09-27 | Tripping device for circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6276117A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005051936A (en) * | 2003-07-29 | 2005-02-24 | Densei Lambda Kk | Feeder system and power supply method |
| CN101953047B (en) * | 2008-02-29 | 2014-11-12 | 三菱电机株式会社 | Driving controller of AC motor |
| JP2011010393A (en) | 2009-06-23 | 2011-01-13 | Panasonic Electric Works Co Ltd | Apparatus for protecting direct current branch circuit |
-
1985
- 1985-09-27 JP JP21429985A patent/JPS6276117A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6276117A (en) | 1987-04-08 |
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