JPH1125839A - Current-suppressing circuit breaker unit - Google Patents
Current-suppressing circuit breaker unitInfo
- Publication number
- JPH1125839A JPH1125839A JP2244598A JP2244598A JPH1125839A JP H1125839 A JPH1125839 A JP H1125839A JP 2244598 A JP2244598 A JP 2244598A JP 2244598 A JP2244598 A JP 2244598A JP H1125839 A JPH1125839 A JP H1125839A
- Authority
- JP
- Japan
- Prior art keywords
- circuit breaker
- current
- housing
- limiting element
- current suppression
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/08—Terminals; Connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/42—Impedances connected with contacts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Control Of Ac Motors In General (AREA)
- Breakers (AREA)
- Keying Circuit Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は誘導電動機保護用の
電流抑制遮断器ユニットに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current suppression circuit breaker unit for protecting an induction motor.
【０００２】[0002]
【従来の技術】工具製作工業内の電動機が順方向および
逆方向に繰り返し切り替えられるとき、大きな突入電流
が一時的に短時間の間生じる。電流が逆転する度毎に回
路遮断が行われることを防止するために、一般には過負
荷継電器と直列にヒューズを設けて、関連する設備を異
常な過電流状態から保護するようにしている。ヒューズ
が繰り返し大電流を受けたときの熱老化の発生により、
ヒューズは定期的に交換する必要がある。高効率の電動
機に伴う現象では、突入電流が大きくなるにつれて、熱
老化の程度が高くなるので、高効率の電動機を用いる場
合には熱老化に抵抗するために定格の一層高いヒューズ
が必要とされる。米国特許第５，４２６，４０６号明細
書には、ヒューズの熱的損傷を低減し且つ過負荷継電器
との効果的な整合のためにヒューズおよび遮断器を選択
することが記載されている。それらの特殊な用途のた
め、このような高定格のヒューズと過負荷継電器との組
合せは工具製作工業以外の用途が制限されている。2. Description of the Related Art When motors in the tooling industry are repeatedly switched in the forward and reverse directions, large inrush currents temporarily occur for short periods of time. To prevent the circuit from being interrupted each time the current reverses, a fuse is typically provided in series with the overload relay to protect the associated equipment from abnormal overcurrent conditions. Due to the occurrence of thermal aging when the fuse repeatedly receives a large current,
Fuses need to be replaced periodically. The phenomenon associated with high-efficiency motors increases the degree of thermal aging as the inrush current increases, so higher efficiency motors require higher-rated fuses to resist thermal aging. You. U.S. Pat. No. 5,426,406 describes the selection of fuses and circuit breakers for reducing thermal damage to fuses and for effective alignment with overload relays. Due to their particular use, the combination of such a high-rated fuse and overload relay is limited to uses outside the tooling industry.
【０００３】米国特許第５，５３９，３７０号明細書に
は、低抵抗から高抵抗へスイッチングすることによって
短絡電流を制限する重合体製短絡保護素子が記載されて
いる。重合体の抵抗特性は正の抵抗温度係数を持ち、且
つ特定の温度で電気抵抗が低い値から高い値へ急峻に遷
移することを特徴としている。工具製作作業における電
流逆転の繰り返しにより、冷却期間が全く又は殆ど無い
状態で重合体は循環的に加熱される。重合体が加熱され
るにつれて低電気抵抗から高電気抵抗への誤って遷移す
ることを防止するために、重合体素子は一層高い定常状
態電流定格を有することが必要になる。しかし、このよ
うな一層高い定格の素子は、スイッチングさせるのに必
要なエネルギが増大するので、短絡状態の際に最適な保
護を行うことが出来ない。US Pat. No. 5,539,370 describes a polymer short-circuit protection device which limits short-circuit current by switching from low to high resistance. The resistance characteristic of the polymer is characterized by having a positive temperature coefficient of resistance and a sharp transition from a low value to a high value at a specific temperature. Due to the repetition of the current reversal in the tool making operation, the polymer is cyclically heated with no or little cooling period. To prevent false transitions from low to high electrical resistance as the polymer is heated, the polymer element needs to have a higher steady state current rating. However, such higher rated elements do not provide optimal protection in the event of a short circuit because of the increased energy required for switching.
【０００４】米国特許第４，８８４，１６４号明細書に
は、広範囲の長時間および短時間過電流状態にわたって
調節可能である電子式トリップ・ユニットを持つ工業用
定格の遮断器が記載されている。米国特許第４，９６
７，３０４号明細書には、電動機保護用途に作られた制
御アルゴリズムを含む電子式電動機トリップ・パラメー
タを持つディジタル遮断器が記載されている。US Pat. No. 4,884,164 describes an industrially rated circuit breaker having an electronic trip unit that is adjustable over a wide range of long and short overcurrent conditions. . US Patent No. 4,96
No. 7,304 describes a digital circuit breaker with electronic motor trip parameters including a control algorithm made for motor protection applications.
【０００５】１９９５年８月１１日出願の米国特許出願
第０８／５１４，０７６号明細書には、正の抵抗温度係
数特性に左右されない重合体製電流制限素子が記載され
ている。[0005] US patent application Ser. No. 08 / 514,076, filed Aug. 11, 1995, describes a polymer current limiting element that is not dependent on positive temperature coefficient of resistance characteristics.
【０００６】[0006]
【発明が解決しようとする課題】循環的な老化を受け難
く且つ工具製作作業に使用されるときに定期的な交換が
必要とされない電流抑制ユニットを持つ電子式トリップ
・ユニットを用いる遮断器を提供することは経済的に有
利である。本発明の１つの目的は、電動機逆転時に被保
護回路を遮断せず、熱動過負荷継電器と整合することが
でき、また短絡電流に対する最適な保護を行うようにし
た遮断器及び電流抑制ユニットの組合せを提供すること
である。SUMMARY OF THE INVENTION A circuit breaker using an electronic trip unit having a current suppression unit that is less susceptible to cyclical aging and does not require periodic replacement when used in tooling operations. Doing so is economically advantageous. SUMMARY OF THE INVENTION One object of the present invention is to provide a circuit breaker and a current suppression unit which can match a thermal overload relay without interrupting a protected circuit at the time of motor reversal and provide optimum protection against short-circuit current. It is to provide a combination.
【０００７】[0007]
【課題を解決するための手段】本発明は、電子式トリッ
プ・ユニットを含むと共に、正の抵抗温度係数特性に左
右されない重合体製電流制限素子を持つ電流抑制ユニッ
トを含んでいる誘導電動機保護用遮断器を有する。電子
式トリップ・ユニットは、長時間および短時間過電流保
護を行うように調節される。電流抑制ユニットは、遮断
器が被保護回路を隔離するように応動するまで短絡電流
を制限するように設計されている。SUMMARY OF THE INVENTION The present invention is directed to an induction motor protection system including an electronic trip unit and a current suppression unit having a polymeric current limiting element independent of a positive temperature coefficient of resistance characteristic. Has a circuit breaker. The electronic trip unit is adjusted to provide long and short term overcurrent protection. The current suppression unit is designed to limit the short circuit current until the circuit breaker reacts to isolate the protected circuit.
【０００８】本発明の一態様では、遮断器ハウジング、
回路電流を遮断するために前記遮断器ハウジング内に配
置された少なくとも一対の遮断器接点、前記遮断器接点
を開離させるために前記遮断器ハウジング内に配置され
た遮断器作動機構、前記遮断器ハウジング内に配置され
ていて、被保護回路内に過電流状態が生じたときに前記
遮断器接点を開離させるために前記遮断器作動機構を駆
動するトリップ・ユニット、前記遮断器ハウジングに近
接して配置された少なくとも１つの電流制限素子用ハウ
ジング、および回路電流を通すように前記遮断器接点と
電気接続されていて、前記過電流状態が生じたときに該
回路電流を所定の値に制限する少なくとも１つの電流制
限素子、を含んでいる電流抑制遮断器ユニットが提供さ
れる。一実施態様では、遮断器ハウジングは電気絶縁性
のケースおよびカバーで構成され、トリップ・ユニット
は過電流状態を監視してそれに応答する電子手段を含
み、電流制限素子用ハウジングは遮断器ハウジングに取
り付けられている。電流制限素子は１０００゜Ｃより低
い蒸発温度を持ち、また正の抵抗温度係数を持っていな
い少なくとも１つの導電性重合体材料を有する。導電性
重合体材料は、一実施態様では導電性充填剤を含んでい
る。導電性重合体材料の一方の面には第１の導電性電極
が設けられ、反対側の面には第２の導電性電極が設けら
れる。更に、導電性重合体材料に圧縮力を加える手段が
設けられ、該手段は、電流制限素子用ハウジングの第１
の面と第１の電極との間に配置された第１の圧縮ばね、
および電流制限素子用ハウジングの第２の面と第２の電
極との間に配置された第２の圧縮ばねで構成される。遮
断器ハウジングには、一実施態様では、電流制限素子用
ハウジングに一体に形成された手段を受け入れるため
の、例えばダブテール形溝のような手段が一体に形成さ
れている。更に、電流制限素子用ハウジングから少なく
とも１つの線路側帯金が延在し、この少なくとも１つの
線路側帯金は、遮断器ハウジングから延在する少なくと
も１つの遮断器負荷側帯金に接続されている。更に、電
流制限素子用ハウジングから、配電回路に接続するため
の少なくとも１つの負荷側帯金が延在している。遮断器
ハウジングおよび電流制限素子用ハウジングは１つの電
流抑制遮断器ハウジングとして組み立てられる。In one aspect of the invention, a circuit breaker housing,
At least one pair of circuit breaker contacts arranged in the circuit breaker housing for interrupting a circuit current, a circuit breaker operating mechanism arranged in the circuit breaker housing for opening the circuit breaker contacts, the circuit breaker A trip unit disposed in the housing for driving the circuit breaker actuation mechanism to open the circuit breaker contacts when an overcurrent condition occurs in the protected circuit; And at least one housing for a current limiting element, which is electrically connected to the circuit breaker contact so as to pass a circuit current, and limits the circuit current to a predetermined value when the overcurrent condition occurs. A current suppression breaker unit is provided that includes at least one current limiting element. In one embodiment, the breaker housing comprises an electrically insulating case and cover, the trip unit includes electronic means for monitoring and responding to an overcurrent condition, and the housing for the current limiting element is mounted on the breaker housing. Have been. The current limiting element has an evaporation temperature below 1000 ° C. and has at least one conductive polymer material that does not have a positive temperature coefficient of resistance. The conductive polymer material includes a conductive filler in one embodiment. A first conductive electrode is provided on one side of the conductive polymer material, and a second conductive electrode is provided on the opposite side. Further, means are provided for applying a compressive force to the conductive polymer material, the means including a first member of the current limiting element housing.
A first compression spring disposed between the first surface and the first electrode;
And a second compression spring disposed between the second surface of the current limiting element housing and the second electrode. In one embodiment, the circuit breaker housing is integrally formed with means, such as a dovetail groove, for receiving means integrally formed in the housing for the current limiting element. Furthermore, at least one line side band extends from the housing for the current limiting element, and the at least one line side band is connected to at least one circuit breaker load side band extending from the circuit breaker housing. In addition, at least one load strap extends from the current limiting element housing for connection to the distribution circuit. The circuit breaker housing and the housing for the current limiting element are assembled as one current suppression circuit breaker housing.
【０００９】[0009]
【発明の実施の形態】図１は、前掲の米国特許第４，８
８４，１６４号明細書に記載されているような電子式遮
断器１０と電流抑制ユニット２０とで構成されている電
流抑制遮断器ユニット１９を示している。電子式遮断器
は、遮断器ケース１１、遮断器カバー１２、および操作
ハンドル１４の両側に取り付けられた、米国特許第４，
７５４，２４７号明細書に記載されているようなアクセ
サリ・カバー１３を含む。米国特許第４，６４９，４５
５号明細書に記載されているような電子式トリップ・ユ
ニット１５が、カバーの内部に収容されてている。電流
抑制ユニットの容器内に一体に形成されたダブテール形
突起２１が、遮断器カバー内に一体に形成されたダブテ
ール形溝１６と係合する。ねじ２２（図２に示されてい
る）が頂部開口１７を介して挿入されて、電流抑制ユニ
ット２０を電子式遮断器１０に電気接続する。負荷側端
子２３が被保護回路との電気接続のために設けられ、端
子アクセス孔２４により接近することが出来る。DETAILED DESCRIPTION OF THE INVENTION FIG.
84 shows a current suppression circuit breaker unit 19 comprising an electronic circuit breaker 10 and a current suppression unit 20 as described in U.S. Pat. The electronic circuit breaker is mounted on both sides of a circuit breaker case 11, a circuit breaker cover 12, and an operation handle 14, US Pat.
Includes an accessory cover 13 as described in U.S. Pat. U.S. Pat. No. 4,649,45
An electronic trip unit 15, such as that described in US Pat. A dovetail shaped projection 21 integrally formed in the container of the current suppression unit engages a dovetail shaped groove 16 integrally formed in the circuit breaker cover. A screw 22 (shown in FIG. 2) is inserted through the top opening 17 to electrically connect the current suppression unit 20 to the electronic circuit breaker 10. A load terminal 23 is provided for electrical connection with the protected circuit and is accessible by the terminal access hole 24.
【００１０】電流抑制ユニット２０と電子式遮断器１０
との間の電気的および機械的接続が図２に示されてい
る。電流抑制ユニットと一体のダブテール形突起２１
が、遮断器カバー１２と一体のダブテール形溝１６と機
械的インターロックを構成する。電流抑制ユニットから
延在する線路側帯金２５が、頂部開口１７を介して挿入
されたねじ２２によって、電子式遮断器から延在する負
荷側帯金１８に電気的および機械的に接続される。電流
抑制ユニットは、ハウジング３２、および前掲の米国特
許出願第０８／５１４，０７６号明細書に記載されてい
るように動作する電流制限素子２６を有する。電極端子
２７ａおよび２７ｂが電流制限素子２６の電極２９ａお
よび２９ｂにそれぞれ電気接続されていると共に、線路
側帯金２５および負荷側端子２３にそれぞれ電気接続さ
れている。電流制限素子は重合体導体２８で構成され、
突合せ接触する電極２９ａおよび２９ｂと直列に電気接
続されている。ばね３０ａおよび３０ｂが電極と支持面
３１ａおよび３１ｂとの間に配置されて、電極と重合体
導体との間に圧縮力を加える。端子アクセス孔２４を介
して挿入されたラグ３３が負荷側端子２３に取り付けら
れて、配電回路との接続が行われる。The current suppression unit 20 and the electronic circuit breaker 10
The electrical and mechanical connections between are shown in FIG. Dovetail projection 21 integrated with current suppression unit
Constitutes a mechanical interlock with the dovetail groove 16 integral with the circuit breaker cover 12. A line strap 25 extending from the current suppression unit is electrically and mechanically connected to a load strap 18 extending from the electronic circuit breaker by a screw 22 inserted through the top opening 17. The current suppression unit has a housing 32 and a current limiting element 26 that operates as described in the aforementioned U.S. patent application Ser. No. 08 / 514,076. The electrode terminals 27a and 27b are electrically connected to the electrodes 29a and 29b of the current limiting element 26, respectively, and are also electrically connected to the line-side metal band 25 and the load-side terminal 23, respectively. The current limiting element is composed of a polymer conductor 28,
It is electrically connected in series with the butting electrodes 29a and 29b. Springs 30a and 30b are disposed between the electrodes and the support surfaces 31a and 31b to apply a compressive force between the electrodes and the polymer conductor. The lug 33 inserted through the terminal access hole 24 is attached to the load-side terminal 23, and connection with the power distribution circuit is performed.
【００１１】本発明による電流抑制遮断器ユニット１９
の逆時間−電流動作特性は、図１および図３を参照する
ことによって最も良く理解されるように、総合保護プロ
フィール４０を有する。総合保護プロフィールは電子式
遮断器の保護プロフィール４１と電流制限素子の保護プ
ロフィール４２との組合せより成る。電流抑制ユニット
２０に正の抵抗温度係数効果が無いので、短時間応答プ
ロフィールの屈折点と呼ばれる点Ａの区域で電子式遮断
器の保護プロフィールと最適な整合が得られる。最適な
整合には、電流抑制ユニットが点Ａの右側または上側で
動作することが必要である。さもないと、電流抑制ユニ
ット２０の時期尚早な応答が、関連する電子式遮断器１
０の適正な動作を妨害する。最適な整合は、電流制限素
子における正の抵抗温度係数特性を除くか、或いはここ
に提案するように電流抑制のために正の抵抗温度係数特
性に左右されない電流制限素子を利用することによっ
て、達成される。ヒューズまたは正の抵抗温度係数の重
合体製電流制限体により行われる以前の保護は、正の抵
抗温度係数保護プロフィール４３ａおよび４３ｂによっ
て表される。正の抵抗温度係数保護プロフィール４３ａ
は、ｘよりずっと大きい瞬時短絡電流に対して有効な電
流抑制ユニット保護プロフィール４２と実質的に等価な
性能を示す。しかし、点Ａの区域では、正の抵抗温度係
数保護プロフィール４３ａは、この正の抵抗温度係数特
性が点Ａより下側および左側にあることから明らかなよ
うに、電子式遮断器の保護プロフィール４１と整合しな
い。点Ａ付近で所望の整合を得るためには、正の抵抗温
度係数保護プロフィール４３ｂが正確に予め定められて
いなければならない。しかし、ｘよりずっと大きい瞬時
短絡電流の場合、正の抵抗温度係数保護プロフィール４
３ｂは有効な電流抑制ユニット保護プロフィール４２よ
りも実質的に低い性能を示す。正の抵抗温度係数保護プ
ロフィール４３ｂと有効な電流抑制ユニット保護プロフ
ィール４２との差が、陰影を付けた区域Ｂで図示されて
いる。[0011] The current suppression circuit breaker unit 19 according to the present invention.
Has an overall protection profile 40, as best understood by reference to FIGS. The overall protection profile consists of a combination of the protection profile 41 of the electronic circuit breaker and the protection profile 42 of the current limiting element. Since the current suppression unit 20 has no positive temperature coefficient of resistance effect, an optimal match with the protection profile of the electronic circuit breaker is obtained in the area of point A, called the inflection point of the short-term response profile. Optimal matching requires that the current suppression unit operate to the right or above point A. Otherwise, the premature response of the current suppression unit 20 may be caused by the associated electronic circuit breaker 1
0 interferes with proper operation. Optimum matching is achieved by eliminating the positive temperature coefficient of resistance characteristic of the current limiting element or by using a current limiting element independent of the positive temperature coefficient of resistance for current suppression as proposed herein. Is done. Previous protection provided by a fuse or a positive resistance temperature coefficient polymeric current limiter is represented by positive resistance temperature coefficient protection profiles 43a and 43b. Positive temperature coefficient protection profile 43a
Shows a performance substantially equivalent to a current suppression unit protection profile 42 effective for momentary short circuit currents much larger than x. However, in the area of point A, the positive resistance temperature coefficient protection profile 43a is the protection profile 41 of the electronic circuit breaker, as is evident from the fact that this positive resistance temperature coefficient characteristic is below and to the left of point A. Does not match. In order to obtain the desired match near point A, the positive temperature coefficient of resistance protection profile 43b must be precisely predetermined. However, for momentary short-circuit currents much larger than x, a positive resistance temperature coefficient protection profile 4
3b shows substantially lower performance than the active current suppression unit protection profile 42. The difference between the positive resistance temperature coefficient protection profile 43b and the active current suppression unit protection profile 42 is shown in shaded area B.
【００１２】電流抑制遮断器ユニットの動作によって実
現される利点は図１乃至図３を一緒に参照することによ
って最も良く理解されよう。被保護回路に定格動作電流
が流れている場合、電流抑制遮断器ユニット１９内の電
子式遮断器１０および電流抑制ユニット２０は休止状態
にある。値ｘまでの短時間および長時間過電流の発生時
には、電子式遮断器が被保護回路を遮断するように適切
の応動する。ｘ′より大きい瞬時短絡電流の発生時に
は、電流抑制遮断器ユニットは素早く応動して、前掲の
米国特許出願第０８／５１４，０７６号明細書に記載さ
れているように短絡直通エネルギを制限する。電流抑制
ユニットと電子式遮断器内の電子式トリップ・ユニット
との間の整合（すなわち協調）は、電子式遮断器が前掲
の米国特許第４，８８４，１６４号明細書に記載されて
いるようにトリップ信号を受けてそれに応答することに
よって被保護回路を効率よく隔離することを保証する。The advantages realized by the operation of the current suppression breaker unit can best be understood by referring to FIGS. When the rated operating current is flowing through the protected circuit, the electronic circuit breaker 10 and the current suppression unit 20 in the current suppression circuit breaker unit 19 are in a rest state. In the event of short- and long-term overcurrents up to the value x, the electronic circuit breaker reacts appropriately to interrupt the protected circuit. In the event of an instantaneous short circuit current greater than x ', the current suppression circuit breaker unit responds quickly to limit short circuit direct energy as described in the aforementioned U.S. patent application Ser. No. 08 / 514,076. The matching (i.e., coordination) between the current suppression unit and the electronic trip unit in the electronic circuit breaker is as described in U.S. Pat. By receiving and responding to the trip signal, the protected circuit is efficiently isolated.
【００１３】以上、電子式トリップ・ユニットを持つ電
子式遮断器と直列に接続された電流抑制ユニットを有す
る電流抑制遮断器ユニットを説明した。電流抑制遮断器
ユニットは、定期的に交換する必要もなく、被保護回路
に対して短時間および長時間過電流保護並びに短絡電流
保護を行う。Thus, a current suppression breaker unit having a current suppression unit connected in series with an electronic circuit breaker having an electronic trip unit has been described. The current suppression circuit breaker unit provides short-term and long-term overcurrent protection and short-circuit current protection for the protected circuit without the need for periodic replacement.
【図１】本発明による電流抑制遮断器ユニットの斜視図
である。FIG. 1 is a perspective view of a current suppression circuit breaker unit according to the present invention.
【図２】図１の電流抑制遮断器ユニット内の電流抑制ユ
ニットの部分断面図である。FIG. 2 is a partial sectional view of a current suppression unit in the current suppression circuit breaker unit of FIG. 1;
【図３】図１の電流抑制遮断器ユニットによって得られ
る過電流保護を表すグラフである。FIG. 3 is a graph illustrating overcurrent protection provided by the current suppression breaker unit of FIG.
１０ 電子式遮断器 １１ 遮断器ケース １２ 遮断器カバー １３ アクセサリ・カバー １４ 操作ハンドル １５ 電子式トリップ・ユニット １６ ダブテール形溝 １７ 頂部開口 １８ 負荷側帯金 １９ 電流抑制遮断器ユニット ２０ 電流抑制ユニット ２１ ダブテール形突起 ２２ ねじ ２３ 負荷側端子 ２４ 端子アクセス孔 ２５ 線路側帯金 ２６ 電流制限素子 ２７ａ、２７ｂ 電極端子 ２８ 重合体導体 ２９ａ、２９ｂ 電極 ３０ａ、３０ｂ ばね ３１ａ、３１ｂ 支持面 ３２ ハウジング３２ ３３ ラグ DESCRIPTION OF SYMBOLS 10 Electronic circuit breaker 11 Circuit breaker case 12 Circuit breaker cover 13 Accessory cover 14 Operation handle 15 Electronic trip unit 16 Dovetail type groove 17 Top opening 18 Load side metal band 19 Current suppression circuit breaker unit 20 Current suppression unit 21 Dovetail type Projection 22 Screw 23 Load side terminal 24 Terminal access hole 25 Line side band 26 Current limiting element 27 a, 27 b Electrode terminal 28 Polymer conductor 29 a, 29 b Electrode 30 a, 30 b Spring 31 a, 31 b Support surface 32 Housing 32 33 Lug
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ライオネル・エム・レヴィンソン アメリカ合衆国、ニューヨーク州、スケネ クタデイ、リンダ・レーン、１番 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Lionel M. Levinson, Linda Lane, Schenectady, New York, United States, No. 1
Claims (15)
置された少なくとも一対の遮断器接点、 前記遮断器接点を開離させるために前記遮断器ハウジン
グ内に配置された遮断器作動機構、 前記遮断器ハウジング内に配置されていて、被保護回路
内に過電流状態が生じたときに前記遮断器接点を開離さ
せるために前記遮断器作動機構を駆動するトリップ・ユ
ニット、 前記遮断器ハウジングに近接して配置された少なくとも
１つの電流制限素子用ハウジング、および回路電流を通
すように前記遮断器接点と電気接続されていて、前記過
電流状態が生じたときに該回路電流を所定の値に制限す
る少なくとも１つの電流制限素子、を含んでいることを
特徴とする電流抑制遮断器ユニット。A circuit breaker housing, at least one pair of circuit breaker contacts disposed in the circuit breaker housing for interrupting a circuit current, and disposed in the circuit breaker housing to open the circuit breaker contacts. A trip breaker actuation mechanism disposed in the breaker housing and driving the breaker actuation mechanism to open the breaker contacts when an overcurrent condition occurs in the protected circuit. A unit, a housing for at least one current limiting element disposed proximate the circuit breaker housing, and electrically connected to the circuit breaker contacts to conduct circuit current, wherein the unit is configured to receive the circuit current when the overcurrent condition occurs. A current suppression circuit breaker unit including at least one current limiting element for limiting a circuit current to a predetermined value.
ケースおよびカバーで構成されている請求項１記載の電
流抑制遮断器ユニット。2. The current suppressing circuit breaker unit according to claim 1, wherein the circuit breaker housing is constituted by an electrically insulating case and a cover.
状態を監視してそれに応答する電子手段を含んでいる請
求項１記載の電流抑制遮断器ユニット。3. The current suppression circuit breaker unit of claim 1, wherein said trip unit includes electronic means for monitoring and responding to said overcurrent condition.
断器ハウジングに取り付けられている請求項１記載の電
流抑制遮断器ユニット。4. The current suppression circuit breaker unit according to claim 1, wherein said current limiting element housing is mounted on said circuit breaker housing.
低い蒸発温度を持つ少なくとも１つの導電性重合体材料
を有している請求項１記載の電流抑制遮断器ユニット。5. The current suppression circuit breaker unit according to claim 1, wherein said current limiting element comprises at least one conductive polymer material having an evaporation temperature below 1000 ° C.
係数を持っていない請求項５記載の電流抑制遮断器ユニ
ット。6. The current suppression circuit breaker unit according to claim 5, wherein said conductive polymer material does not have a positive temperature coefficient of resistance.
を含んでいる請求項５記載の電流抑制遮断器ユニット。7. The current suppression circuit breaker unit according to claim 5, wherein said conductive polymer material includes a conductive filler.
の導電性電極が設けられ、且つ前記導電性重合体材料の
反対側の面に第２の導電性電極が設けられている請求項
５記載の電流抑制遮断器ユニット。8. A conductive polymer material having a first surface on one side thereof.
6. The current suppression circuit breaker unit according to claim 5, wherein a conductive electrode is provided, and a second conductive electrode is provided on a surface opposite to the conductive polymer material.
加える手段が設けられている請求項８記載の電流抑制遮
断器ユニット。9. The current suppression circuit breaker unit according to claim 8, further comprising means for applying a compressive force to said conductive polymer material.
流制限素子用ハウジングの第１の面と前記第１の電極と
の間に配置された第１の圧縮ばね、および前記電流制限
素子用ハウジングの第２の面と前記第２の電極との間に
配置された第２の圧縮ばねで構成されている請求項９記
載の電流抑制遮断器ユニット。10. The current limiting element according to claim 1, wherein said means for applying a compressive force comprises: a first compression spring disposed between a first surface of said current limiting element housing and said first electrode; The current suppression circuit breaker unit according to claim 9, further comprising a second compression spring disposed between a second surface of the housing and the second electrode.
限素子用ハウジングに一体に形成された手段を受け入れ
るために前記遮断器ハウジングに一体に形成された手段
を含んでいる請求項４記載の電流抑制遮断器ユニット。11. The current suppression of claim 4 wherein said circuit breaker housing includes means integrally formed with said circuit breaker housing for receiving means integrally formed with said current limiting element housing. Circuit breaker unit.
形溝を含んでいる請求項４記載の電流抑制遮断器ユニッ
ト。12. The current suppression circuit breaker unit according to claim 4, wherein said circuit breaker housing includes a dovetail-shaped groove.
から少なくとも１つの線路側帯金が延在し、前記少なく
とも１つの線路側帯金が、前記遮断器ハウジングから延
在する少なくとも１つの遮断器負荷側帯金に接続されて
いる請求項１記載の電流抑制遮断器ユニット。13. The at least one line side band extends from the current limiting element housing, and the at least one line side band extends from the circuit breaker housing to at least one circuit breaker load side band. The current suppression circuit breaker unit according to claim 1, which is connected to a power supply.
から、配電回路に接続するための少なくとも１つの負荷
側帯金が延在している請求項１３記載の電流抑制遮断器
ユニット。14. The current suppression circuit breaker unit according to claim 13, further comprising at least one load side band extending from the current limiting element housing for connection to a power distribution circuit.
制限素子用ハウジングが１つの電流抑制遮断器ハウジン
グとして組み立てられている請求項１記載の電流抑制遮
断器ユニット。15. The current suppression circuit breaker unit according to claim 1, wherein said circuit breaker housing and said current limiting element housing are assembled as one current suppression circuit breaker housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79715197A | 1997-02-10 | 1997-02-10 | |
| US08/797151 | 1997-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1125839A true JPH1125839A (en) | 1999-01-29 |
Family
ID=25170056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2244598A Withdrawn JPH1125839A (en) | 1997-02-10 | 1998-02-04 | Current-suppressing circuit breaker unit |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH1125839A (en) |
| DE (1) | DE19803919A1 (en) |
| ES (1) | ES2142263B1 (en) |
| FR (1) | FR2759490A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008078004A (en) * | 2006-09-22 | 2008-04-03 | Tempearl Ind Co Ltd | Circuit breaker |
| JP2008078005A (en) * | 2006-09-22 | 2008-04-03 | Tempearl Ind Co Ltd | Circuit breaker |
| US11870365B2 (en) | 2021-08-10 | 2024-01-09 | Honda Motor Co., Ltd. | AC generation circuit and AC generation device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3117203A (en) * | 1960-05-17 | 1964-01-07 | Gen Electric | Circuit protective devices and circuits |
| US4754247A (en) * | 1987-06-12 | 1988-06-28 | General Electric Company | Molded case circuit breaker accessory enclosure |
| US4806893A (en) * | 1988-03-03 | 1989-02-21 | General Electric Company | Molded case circuit breaker actuator-accessory unit |
| JPH047801A (en) * | 1990-04-25 | 1992-01-13 | Daito Tsushinki Kk | Ptc device |
| US5382938A (en) * | 1990-10-30 | 1995-01-17 | Asea Brown Boveri Ab | PTC element |
| DE4228297A1 (en) * | 1992-08-26 | 1994-03-03 | Siemens Ag | Changeable high current resistor, especially for use as a protective element in power switching technology, and switching using the high current resistor |
| DE4330607A1 (en) * | 1993-09-09 | 1995-03-16 | Siemens Ag | Limiter for current limitation |
| US5426406A (en) * | 1993-10-10 | 1995-06-20 | General Electric Company | Induction motor protective circuit breaker unit |
| US5473495A (en) * | 1993-12-03 | 1995-12-05 | Eaton Corporation | Combination load controller |
| US5539370A (en) * | 1995-02-17 | 1996-07-23 | General Electric Company | Inductive motor protective circuit breaker |
| US5614881A (en) * | 1995-08-11 | 1997-03-25 | General Electric Company | Current limiting device |
-
1998
- 1998-02-02 DE DE1998103919 patent/DE19803919A1/en not_active Withdrawn
- 1998-02-04 JP JP2244598A patent/JPH1125839A/en not_active Withdrawn
- 1998-02-06 ES ES9800227A patent/ES2142263B1/en not_active Expired - Fee Related
- 1998-02-09 FR FR9801463A patent/FR2759490A1/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008078004A (en) * | 2006-09-22 | 2008-04-03 | Tempearl Ind Co Ltd | Circuit breaker |
| JP2008078005A (en) * | 2006-09-22 | 2008-04-03 | Tempearl Ind Co Ltd | Circuit breaker |
| US11870365B2 (en) | 2021-08-10 | 2024-01-09 | Honda Motor Co., Ltd. | AC generation circuit and AC generation device |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2142263B1 (en) | 2000-11-16 |
| DE19803919A1 (en) | 1998-08-13 |
| FR2759490A1 (en) | 1998-08-14 |
| ES2142263A1 (en) | 2000-04-01 |
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