WO1991000609A1 - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
WO1991000609A1
WO1991000609A1 PCT/JP1990/000835 JP9000835W WO9100609A1 WO 1991000609 A1 WO1991000609 A1 WO 1991000609A1 JP 9000835 W JP9000835 W JP 9000835W WO 9100609 A1 WO9100609 A1 WO 9100609A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
contact
limiting contact
current limiting
circuit breaker
Prior art date
Application number
PCT/JP1990/000835
Other languages
French (fr)
Japanese (ja)
Inventor
Terumi Shimano
Kuniyoshi Sakai
Tomoyoshi Saito
Kinichi Shioda
Hiroshi Suzuki
Wataru Teraoka
Kazuhiko Kato
Original Assignee
Hitachi, Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP16664089A external-priority patent/JP2633959B2/en
Priority claimed from JP1318752A external-priority patent/JP2711002B2/en
Priority claimed from JP2067009A external-priority patent/JP2714216B2/en
Application filed by Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to EP90909849A priority Critical patent/EP0482197B1/en
Priority to DE69030666T priority patent/DE69030666T2/en
Publication of WO1991000609A1 publication Critical patent/WO1991000609A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/107—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by the blow-off force generating means, e.g. current loops
    • H01H77/108—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by the blow-off force generating means, e.g. current loops comprising magnetisable elements, e.g. flux concentrator, linear slot motor

Definitions

  • the present invention relates to a circuit breaker, and more particularly to a circuit breaker suitable for improving and limiting the current limiting performance of a current limiter having an electromagnetic repulsion mechanism.
  • this type of equipment consists of a movable contact on the load side (the movable contact block of the []) connected to the closing mechanism as described in Japanese Utility Model Publication No. 52-45-164.
  • a central movable contact (second movable contact block) having contacts at both ends provided opposite thereto and rotating around a central portion as a fulcrum, and a movable contact at the center opposed to the central movable contact.
  • a movable contact on the power supply side provided in the manner described above.
  • the movable contact on the load side and the movable contact on the power supply side are each rotatably supported.
  • the directions of the currents flowing through the load-side movable contact and the central movable contact are opposite to each other, and the directions of the current flowing through the central movable contact block and the power-side movable contact are also opposite.
  • Direction In this conventional configuration, when a large current flows, a repulsive force is generated between the movable contact on the load side and the movable contact on the center due to an omnidirectional current, and the movable contact on the center and the power A repulsive force due to a different direction current also occurs between the movable contacts on the side. As a result, a couple around the fulcrum at the center acts on the central movable contact, and the central movable contact rotates in the direction to separate the contacts.
  • An object of the present invention is to provide a small circuit breaker that can increase the opening speed and is excellent in current limiting effect.
  • a circuit breaker comprises a fixed conductor having a power supply terminal at one end and a load terminal at the other end, a fixed conductor having one end connected to the power supply terminal and a conductive connection means at the other end, Is connected to the conductive connecting means, faces the fixed conductor, has a current-limiting contact at the other end, and is rotatably supported at a central portion thereof. And a movable contact base having a movable contact opposed to the current limiting contact. The movable contact block is connected to an opening / closing mechanism to perform opening / closing and tripping operations.
  • the tripping operation of the opening / closing mechanism is performed by a tripping device that detects an overcurrent in the electric circuit from the movable contact block to the load side terminal and causes the opening / closing mechanism to perform the tripping operation.
  • a tripping device that detects an overcurrent in the electric circuit from the movable contact block to the load side terminal and causes the opening / closing mechanism to perform the tripping operation.
  • the current limiting contact block has a repulsion portion at one end for generating a repulsive force due to a reverse current between the fixed conductor and the fixed conductor.
  • a large current such as a short circuit occurs, the repulsive force between the movable contact block and the current limiting contact block, and It rotates with the repulsive force between the fixed conductor and the current limiting contact point as a couple, and separates the current limiting contact and the movable contact.
  • the current limiting contact block is formed by couple using the repulsive force between the fixed conductor and the current limiting contact block that are conductively connected. Since the motor is rotated, it is possible to obtain a small circuit breaker having a high opening speed, an excellent current limiting effect, and a small size.
  • FIG. 1 is a side sectional view showing the configuration of a circuit breaker according to a first embodiment of the present invention
  • FIGS. 2 and 3 are repulsive states of main parts of the circuit breaker according to the present embodiment, respectively.
  • FIG. 4 is a side view showing a configuration of a main part of a circuit breaker according to a second embodiment of the present invention.
  • FIG. 5 is a side view showing a circuit breaker according to a third embodiment of the present invention.
  • FIG. 6 is a side view showing a configuration of a main part of a circuit breaker according to a fourth embodiment of the present invention
  • FIG. 7 is a fifth embodiment of the present invention.
  • b) and (c) are side sectional views of the main part and current-limiting contact, respectively.
  • Fig. 8 shows a modified example of this embodiment.
  • Fig. 8 (a) and (b) show the side view of the main part and the cross section of the current limiting contact block, respectively.
  • Fig. 9 and Fig. 9 show a sixth embodiment of the present invention.
  • (A) and (b) are side sectional views and a sectional view of a sliding portion, respectively, showing the structure.
  • Figs. 10 and 11 are respectively
  • FIG. 12 shows a side view and a perspective view of a main part of a seventh embodiment of the present invention
  • FIG. 12 shows an eighth embodiment of the present invention, wherein (a), (b), and (c) denote main parts of i, respectively.
  • FIG. 17 is a tenth embodiment of the present invention.
  • (a), (b), (c) and (d) are The side sectional view showing the configuration, the sectional view of the magnetic drive unit 80, the sectional view of the magnetic drive unit 80a, and the sectional view of a modification of the magnetic drive unit 80 are shown in FIGS.
  • Fig. 19 is a side sectional view showing the configuration of the eleventh embodiment of the present invention, and Fig. 19 is a side view showing the essential parts of the eleventh embodiment of the present invention.
  • the configuration of the circuit breaker of the present embodiment is as follows.
  • the case 1 as a housing is provided with a power supply side terminal 15 at one end and a load side terminal 28 at the other end.
  • a fixed conductor 15 connected to the power supply terminal 18 is provided at the bottom of case 1.
  • a current limiting contact stand 12 is rotatably supported by a bin 17.
  • the current limiting contact base 1 2 has a current limiting contact 11 at one end 12 b, and a repulsive portion 12 a formed at the other end can be used as a conductive connection means with the fixed conductor 15.
  • a conductor 14 is provided.
  • a movable contact stand 9 is provided above the current limiting contact stand 12, and the movable contact stand 9 is connected to the closing mechanism 4.
  • the opening / closing mechanism 4 is manually operated with the handle 3 or an overcurrent detection is performed as an oil dash-bot relay 5 and a movable iron piece 19 which is sucked by the movable iron piece 19 to conceal a trip.
  • an overcurrent detection is performed as an oil dash-bot relay 5 and a movable iron piece 19 which is sucked by the movable iron piece 19 to conceal a trip.
  • the movable contact block 9 is closed or tripped.
  • the opening / closing mechanism having a toggle link mechanism is provided.
  • the two-joint link of the part 4 works, and the interlocking shaft 7 that rotates the movable contact stand 9 for three poles located at one end of the opening / closing mechanism part 4 rotates. Therefore, the movable contact block 9 moves as a whole with the bin 16 as the center of rotation, whereby the movable contact 10 positioned at one end of the movable contact block 9 becomes a current-limiting contact 1 facing the movable contact block 9. It moves to the position where it comes into contact with 1.
  • the current limiting contact 1 2 having one end of the current limiting contact 1 1 is concealed below the opening / closing mechanism 4 in the direction facing the movable contact stand 9.
  • Pin 1 7 Holds the rotation center of the current limiting contact block 1 2, and the return panel 13 provided in this bin 17 urges the current limiting contact block 1 2 clockwise.
  • the return spring 1 3, (i) The One end is engaged with the mold case 1, and the other end is engaged with the repulsion portion 12 a of the current limiting contact block 12.
  • One end of the repulsion portion 12a of this current limiting contact block is connected to a flexible conductor 14 made of a flexible copper fuel wire, and supplies a current from the fixed conductor 15 to the current limiting contact block 12.
  • the parallel portion 15a extending from the fixed conductor 15 is positioned parallel to the lower portion at a position facing the repulsion portion 12a of the current limiting contact block 12.
  • the contact pressure between the movable contact 10 and the current-limiting contact 11 is supplied by a contact spring 8 having the bin 16 serving as the center of rotation of the movable contact stand 9 and having a coaxial axis.
  • the movable contact stand 9 is connected to the load-side terminal 28 via an electric path 88 composed of a flexible conductor 88a and a coil section 88b connected thereto. Oil dash pot relay section 5
  • the parallel portion 15a since the parallel portion 15a is fixed, all the repulsive force generated between the repulsive portion 12a and the parallel portion 15a becomes a force for rotating the current limiting contact stand 12. Further, since the fixed conductor 15 and the current-limiting contact block 12 are connected by the conductor 14, there is no decrease in current due to arc generation at this portion, and the repulsion section 12 a The repulsion between the parallel parts 15a can be increased. Therefore, the opening speed of the current limiting contact block 12 can be made higher than the conventional one. Also, the fixed conductor 15 and the current-limiting contact block 12 can be brought close to each other, and the circuit breaker can be downsized.
  • the extension portion 12 c is connected to the repulsion portion 12 a, and the distance between the parallel conductors in which the current direction for performing the electromagnetic repulsion operation is different. Is made longer.
  • the connecting portion is constituted by the hinge 22 and the flexible conductor 24, and has a bent structure.
  • a part of the repulsion part 12 a of the current limiting contact base 12 can enter the closed part 20 formed in the parallel part ⁇ 5 a of the fixed conductor 15. It is composed. This is because the repulsive force between the edges on both sides of the opening 20 and the side surface of the repulsion portion 12a does not increase the contact pressures of the movable contact 10 and the current-limiting contact 11 and increases the intermediate current. The contact jump is kept low and the electromagnetic repulsion current limiting mechanism is activated only when a large current such as interruption occurs.
  • FIG. 6 shows a fourth embodiment of the present invention.
  • the portion of the fixed conductor 15 close to the power supply terminal 18 has a different direction of current flow from one end 1 b of the current-limiting contact block, which prevents electromagnetic repulsion generated in the form of couple.
  • the force that works in the direction is born.
  • a magnetic absorbing plate 25 is disposed on the fixed conductor 15 to absorb a magnetic force corresponding to the reverse effect.
  • an opening 23 is provided on the terminal 18 side of the fixed conductor 15 on the power supply side, and one end 12 b of the current-limiting contact block 12 is penetrated.
  • the magnetic absorption plate 25 can be made to maintain magnetic force. As shown in Fig.
  • the current limiting contact block 12 is made flat to increase the repulsion force, and reinforcement is provided to prevent deformation due to the repulsion force.
  • Fig. 7 (a) shows the configuration of the current limiting contact block
  • Fig. 7 (b) shows the main section of the AA.
  • Fig. 7 (c) shows the main section.
  • the current limiting contact block 12 is formed in a flat plate shape, and the reinforcement 30 is fixed at right angles thereto by caulking. As shown in FIG. 7 (c), it has the same width as the fixed conductor 15 so that the repulsion force received by the repulsion portion 12a from the parallel portion 15a can be greatly increased. It is configured as follows.
  • both edges of the flow contact stand 12 are bent to form a rising portion 12d for reinforcement.
  • the cross section of the main part is a U-shaped cross section as shown in FIG. 8 (b).
  • the reinforcement can be formed by bending, and the number of man-hours for manufacturing parts can be reduced.
  • a sliding portion 36 connected to the fixed conductor 5 is provided as a conductive connecting means, and the sliding portion 36 and the repulsive portion 12 a of the current-limiting contact base 12 are provided.
  • Contact with the contact part 1 2 e provided to extend and maintain electrical continuity, the position of the current limiting contact block 12 in the QN state of this embodiment, and the position of the current limiting contact block 1 2 in the case of rebound. are shown in FIGS. 9 (a) and 9 (b) by a solid line and a two-dot chain line, respectively.
  • the contact portion 12e slides while maintaining electrical continuity with the sliding portion 36 during the repulsion operation.
  • the heat generated by the intraocular flow contact stand 12 can be transmitted to the fixed conductor 15 via the contact portion 12e and the sliding portion 36, and the temperature rise can be reduced.
  • a seventh embodiment of the present invention will be described with reference to FIG. 10 and FIG. This embodiment particularly considers the aspects of closing and energizing the DC power supply and ensuring the cutoff distance for the cutoff performance.
  • the breaking distance is secured together with the miniaturization:: and it is also effective in terms of AC performance.
  • the opening and closing mechanism is provided.
  • the position of the contact block that has repelled the electromagnetic force is held at the repulsive position g until the complete interruption is completed.
  • the current-limiting switching mechanism is wrapped in another insulating mold case 58 to form a double insulating structure, which eliminates damage due to arcs generated at the time of interruption and adhesion of molten material, and provides highly reliable closing. It provides a mechanism.
  • the contact block operated by electromagnetic repulsion is moved to secure the breaking distance in accordance with the opening / closing operation by the handle operation, and the repulsion operation when a large current such as a short-circuit current flows.
  • the current limiting contact block is moved in the direction of repulsion even during opening and closing operations.
  • the contact block for electromagnetic repulsion provided for each phase is linked simultaneously with each pole, and the three-phase simultaneous repulsion mechanism is provided for the AC performance power supply in addition to securing the cutoff distance with the DC power supply. It is intended to improve the quality.
  • the movable contact block 12 is connected at two locations by two insulating shafts 17 and 54 penetrating through each pole, and is rotated around the bin 17 in a three-phase unit.
  • the movable contact stand provided for each pole is integrated into three phases by shafts 17 and 54, and the total electromagnetic force generated by the current flowing to each pole at the time of electromagnetic repulsion is obtained.
  • the contact block is operated by the sum.
  • the movable frame 57 of the mechanical part 4 is engaged with the three-phase interlocking shaft. Due to the opening operation of the part, the repulsion contact is also cultivated counterclockwise using the pin 17 as the rotation center at the same time for the three phases. As a result, the same breaking distance as that obtained when the electromagnetic repulsion is performed can be secured in the negative electrode state OFF.
  • the present embodiment is intended to prevent contact failure of the contacts by preventing lateral displacement of the current-limiting contact block due to the gap between the eye contact block and the bin.
  • pin 17 is held by frame 62, and movement in the direction perpendicular to the turning surface of current limiting contact block 12 is provided on both sides of bin 17 respectively. It is not regulated by the projections 62a and 62b.
  • FIG. 12 (a) is a view as seen from below the convection contact stand 12. Protrusions 62 a and 62 b from the frame 62 are provided on both sides of the bin 17 which is the rotation fulcrum of the current limiting contact block 12.
  • FIG. 12 (b) shows a state in which the current limiting contact block 12 is shifted laterally from this state. In the same figure, the current limiting contacts 1 and 2 are shown displaced counterclockwise around the bin 17 by the dashed-dotted line.
  • the current limiting contact block 1 2 has the protrusions 6 2 a of the frame 6 2, Contact with 6 2 b, no more lateral displacement.
  • An enlarged view of the pin 17 in this state is shown in FIG. 12 (c).
  • the gap with the pin 17 is A at the central position of the current-limiting contact stand 12, but the gear is B at the central position of the lateral displacement state indicated by the dashed line.
  • the current limiting contact 8 is restricted from lateral displacement even if there is a gap B.
  • the distance from the pin to the projections 62a and 62b can be set arbitrarily, lateral displacement can be regulated even if the projection 62b is not located near the contact, preventing insulation deterioration due to arcing. it can.
  • the frame 62 is an insulating material, the prevention of the insulating deterioration is further improved. In addition, if only insulation deterioration is prevented, it is effective to provide only the protrusion 62 a on the load of the pin 17.
  • the above is an example of preventing the lateral displacement of the current limiting contact block 12.
  • the same can be applied to the movable contact block 9, and a one-sided repulsive circuit block to which the current limiting contact block 12 is fixed is provided. The same effect can be obtained by implementing only the movable contact blocks of breakers and non-current-limiting circuit breakers.
  • a guide bin 64 for performing left and right blurring at the left end portion of the current limiting contact block 12 is caulked to the current limiting contact block 12.
  • the abutment of the side bin with the mold is a spherical shape that slides In this case, measures were taken to reduce the coefficient of friction due to sliding.
  • a ninth embodiment of the present invention will be described with reference to FIGS.
  • the present embodiment is provided with at least two sets of electromagnetic repulsion mechanisms for rotating the current limiting contact base by using the electromagnetic repulsive force generated on both sides of the rotation center of the current limiting contact base as a couple. . Achieved by circuit breakers.
  • a second current limiting contact block 72 is provided below the current limiting contact block 12 and supported by the bin 71 and repelled by using a couple.
  • a flexible stranded wire 14 is connected to one end of the current limiting contact block 12, and its extension is connected to one end of the fixed contact block 73.
  • a fixed contact 74 is arranged at the other end of the fixed contact base 73, and a movable contact 75 is arranged on the second current limiting contact base 22 so as to abut the fixed contact 74.
  • the pin 71 is provided with a panel 76 for urging the second current-limiting contact block 72 counterclockwise.
  • a flexible stranded wire 14 is connected to the other end of the second current limiting contact block 72 opposite to the movable contact 75 with the pin 71 connected, and the extension is connected to one end of the fixed conductor 15. It is connected.
  • the current limiting contact block ⁇ 2 is rotatable around the bin 17, the electromagnetic repulsion between the movable contact block 9 and the current limiting contact block 12, and the current limiting contact block 1 2 and the fixed conductor 15 It is arranged and configured to rotate with the electromagnetic repulsion between them as a couple.
  • the second current limiting contact block 72 is rotatable about the bin 71, so that the electromagnetic repulsion between the fixed conductor 15 and the second current limiting contact block 72 and the fixed contact block 7 3 And the second recurrent contact block 7 2 as the couple It is arranged so that it rotates.
  • the first current limiting contact block 1 2 and the second current limiting contact block 7 2 return to their original positions by the panels 13 and 7 1, and the opening / closing mechanism operates to turn on the second current limiting contact block.
  • the state is as shown in the figure.
  • the opening speed of the current limiting contact block can be greatly improved, and the arc voltage is further doubled by the two current limiting contact blocks, so that the current limiting performance is greatly improved. Is achieved.
  • an electromagnetic repulsion mechanism that uses a couple to open the circuit breaker can be provided at two locations, thereby limiting the current limit. As the speed of opening the contact block increases and the opening distance increases, the arc voltage increases and the current limiting effect is greatly enhanced.
  • the fixed conductor 15 facing the end 12b opposite to the current limiting contact 11 of the current limiting contact block 12 is arranged in parallel.
  • the magnetic flux holding means in the portion 15a the magnetic repulsive force and the speed of the repulsive pole after the repulsion are maintained.
  • a magnetic flux holding means is provided on the side opposite to the arc-extinguishing chamber portion to prevent the influence of the scattering of the molten material at the time of interruption, thereby improving the operation reliability.
  • the magnetic drive device 80 as the magnetic flux holding means is made of a magnetic material, and its AA cross section has a U-shaped cross section as shown in FIG. 17 (b). a is disposed, and a repulsion portion 12a is disposed at a position facing the parallel portion 15a.
  • a clockwise magnetic flux is generated around the repulsion portion 12a by the current flowing through the repulsion portion 12a as shown by a thin arrow in FIG. 17 (b).
  • the repulsion part 12a moves in the direction of the thick arrow to the position g indicated by the two-dot chain line due to the repulsion with the parallel part 15a.
  • the magnetic flux passes through the magnetic drive device 80, it is possible to prevent a decrease in the magnetic flux during the movement, and the moving force of the repulsion portion 12a is maintained by maintaining the driving force of the magnetic flux in the direction of the thick arrow. You. As a result, the speed of the ocular flow contact stand 12 after opening is maintained, and a large current limiting effect can be obtained.
  • the magnetic drive device S80 in the mold walls 40a, 40b, and 40c immediately below the mechanism, the influence on the operation of the molten material scattering when shut off is prevented. And reliability can be improved.
  • a magnetic drive device 80a may be provided between the movable contact stand 9 and the current limit contact stand 12 in order to further improve the corner flow effect.
  • the magnetic drive device 80a is also formed of a magnetic material, and its BB section has a U-shaped section as shown in FIG. The magnetic flux generated by the current flowing through the contact blocks 12 passes through the magnetic material. Therefore, a decrease in magnetic flux during movement of the movable contact block 9 and the current limiting contact block 12 is prevented, and the slide after opening is maintained.
  • the magnetic drive shield 80 is provided with a U-shaped magnetic plate 82 on the outer periphery of the repulsion portion 12a as shown in FIG. A configuration may be adopted in which the top dimension a is made small so that the magnetic drive device works effectively.
  • magnetic drive shields 80b and 80c as magnetic flux holding means are provided on the fixed conductor 15 and the fixed contact block 73 of the circuit breaker of the ninth embodiment of the present invention, respectively. It is a thing.
  • the electromagnetic repulsion force between the parallel portion 15a of the fixed conductor and the second current-limiting contact block 72a is used, and the contacts 74, 75 are formed by the magnetic drive device g80c. It increases the opening speed.
  • This embodiment is a circuit breaker having a structure in which a fixed contact block 78 is fixed to one end of a fixed conductor 15 with a fixed screw 97, and a magnetic drive device 80b is connected via the fixed contact block 78. Is fixed to the fixed conductor 15.
  • the current limiting contact block 1 2 repels before the repulsion of the second current limiting contact block 72 starts.
  • the current limiting contact block 12 is electrically connected to the ⁇ th fixed conductor 15 via the flexible conductor 14 and the second current limiting contact block 72.
  • the magnetic drive device 80 b is fixed to the fixed contact block 78 by a fixing screw 99.
  • the power-supply-side conductor portion consisting of the fixed conductor 15, the fixed contact block 78, and the magnetic drive device 8 Ob can be pre-assembled and handled as a single component. This has the effect of improving workability.
  • the magnetic drive device g may be fixed to the fixed conductor 15.
  • the electromagnetic type using an oil dashpot as the tripping device is disclosed.
  • the tripping device g is not limited to this, and the current of the electric circuit is controlled by a current transformer or the like. It may be of an electronic type that detects and applies a magnetic tripping device g by an electronic circuit, or a thermodynamic type that uses bimetal or the like, or a combination thereof.
  • the electric circuit 88 is connected to the flexible conductor 88a connected to the movable contact block and the flexible conductor 88a to pass through the current transformer and to the load terminal.
  • the electric circuit 88 is connected to the movable conductor 88a connected to the movable contact block and to the flexible conductor 88a. And a heater (not shown) arranged to overheat the bimetal and reach the load side terminal.
  • the current limiting contact base is rotatably supported at the center, one end is opposed to the movable contact base, and the other end is opposed to the fixed conductor.
  • the electromagnetic repulsion between the movable contact block and the current-limiting contact block and the electromagnetic repulsion between the fixed conductor and the current-limiting contact block are used as couples.
  • the dimension between the current limiting contact block and the fixed conductor can be reduced, and the opening speed of the current limiting contact block provides a high speed, excellent breaking performance, and a small circuit breaker. It can be.

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Abstract

A circuit breaker equipped with a mechanism for current limiting by the use of electromagnetic repulsion, aiming at solving a technical problem of improving current-limiting performance by increasing the contact-opening speed of a contact plate of a current-limiting type circuit breaker and realizing the device in a compact size. The current-limiting contact plate is rotatably supported at its central portion, with one end thereof facing a movable contact plate, and with the other end facing a fixed conductor and electrically connected thereto. An electromagnetic repulsive force between the movable contact plate and the current-limiting contact plate and an electromagnetic repulsive force between the fixed conductor and the current-limiting contact plate are used as a couple of forces. It is therefore possible to increase the contact-opening speed and to decrease the distance between the current-limiting contact plate and the fixed conductor. The invention provides a circuit breaker which is small in size and is excellent in breaking performance.

Description

明 細 害  Harm
回路遮断器  Circuit breaker
技術分野 Technical field
本発明は回路遮断器に係り 、 特に電磁反発機構を有する限流遮 断器の限流性能の向上および小形化に好適な回路遮断器に関する < 背景技術  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker, and more particularly to a circuit breaker suitable for improving and limiting the current limiting performance of a current limiter having an electromagnetic repulsion mechanism.
従来のこの種の装萤は、 実閲昭 5 2 — 4 5 1 6 4号に記载のよ う に閲閉機構に接続きれた負荷側の可動接触子 （第 】 の可動接点 台） と、 これに対向して設けられた両端に接点をもち中央部を支 点と して回動する中央の可動接触子 （第 2の可動接点台） と、 こ の中央の可動接触子に対向して設けられた電源側の可動接触子と を備えて成るものである。 負荷側の可動接触子および電源側の可 動接触子はそれぞれ回動自在に支持される。 負荷側の可動接触子 と中央の可動接触子とを流れる電流の向きはそれぞれ逆方向であ り 、 また、 中央の可動接点台と電源側の可動接触子とを流れる電 流の向きもそれぞれ逆方向である。 こ の従来の構成において大電 流が流れる と、 負荷側の可動接触子と中央の可動接触子間で異方 向電流によ る反発力が発生する と ともに、 中央の可動接触子と電 源側の可動接触子間でも異方向電流による反発力が発生する。 こ れによ り中央の可動接触子には、 中央部の支点を中心とする偶力 が働き、 接点を開離させる方向に中央の可動接触子が回転する。  Conventionally, this type of equipment consists of a movable contact on the load side (the movable contact block of the []) connected to the closing mechanism as described in Japanese Utility Model Publication No. 52-45-164. A central movable contact (second movable contact block) having contacts at both ends provided opposite thereto and rotating around a central portion as a fulcrum, and a movable contact at the center opposed to the central movable contact. And a movable contact on the power supply side provided in the manner described above. The movable contact on the load side and the movable contact on the power supply side are each rotatably supported. The directions of the currents flowing through the load-side movable contact and the central movable contact are opposite to each other, and the directions of the current flowing through the central movable contact block and the power-side movable contact are also opposite. Direction. In this conventional configuration, when a large current flows, a repulsive force is generated between the movable contact on the load side and the movable contact on the center due to an omnidirectional current, and the movable contact on the center and the power A repulsive force due to a different direction current also occurs between the movable contacts on the side. As a result, a couple around the fulcrum at the center acts on the central movable contact, and the central movable contact rotates in the direction to separate the contacts.
しかし、 こ の従来の構成においては、 中央の可動接触子と電源 側の可動接触子との間に接点があるので、 開離時の絶縁距離確保 のためこれらの間の距離を短縮できず、 装置が大型化するという 問題がある。 また、 限流時にこの接点に発生するアークによる発 熱、 上記接点部においてワイ ビングを得るための接触面積減少に 伴う電流密度:の增大によ る発熱、 また上記接点部での接触抵抗に よ る発熱によ り溫度上昇が大き く なる という問題がある。 However, in this conventional configuration, since there is a contact between the movable contact in the center and the movable contact on the power supply side, the insulation distance when opening is secured. Therefore, there is a problem that the distance between them cannot be shortened, and the equipment becomes large. In addition, the heat generated by the arc generated at the contact at the time of current limiting, the heat generated due to the increase in the current density due to the reduction of the contact area for obtaining wiping at the contact, and the contact resistance at the contact There is a problem that the temperature rise increases due to the generated heat.
さらに、 大電流の限流時には反発力によ り電源側の可動接触子 が中央の可動接触子から離れる方向に移動して接点が開離される ので、 これらの間の距離の増大およびこれらを流れる電流の減少 によ り電磁反発力が減少して開極スビー ドの高速化を図るこ とが できないという問題がある。  Furthermore, at the time of a large current limit, the movable contact on the power supply side moves away from the central movable contact due to the repulsive force and the contacts are separated, so the distance between them increases and the current flows through them. There is a problem that the electromagnetic repulsion decreases due to the decrease in the current, and the speed of the opening speed cannot be increased.
発明の開示 Disclosure of the invention
本発明は開極速度を向上できて限流効果に優れ、 しかも小形の 回路遮断器を提供する こ とにある。  An object of the present invention is to provide a small circuit breaker that can increase the opening speed and is excellent in current limiting effect.
本発明の回路遮断器は一端に電源側端子と他端に負荷側端子と を備えた筐体内に、 上記電源側端子に一端が接続され他端に導電 接続手段を備えた固定導体と、 一端が上記導電接続手段に'接続さ れて上記固定導体に対向し他端に限流接点を備えて中央部で回動 自在に支持ざれた限流接点台と、 この限流接点台と対向して回動 自在に支持され上記限流接点に対向する可動接点を備えた可動接 点台とを備えてなる。 この可動接点台は開閉機構に接続されて閎 閉および引き外し動作が行われる。 閲閉機構の引き外し動作は上 記可動接点台から上記負荷側端子に至る電路の過電流を検出して 上記開閉機構に引き外し動作を行わせる引き外し装置によ り行な われる。 上記限流接点台は上記固定導体との間に逆向電流による 反発力を発生する反発部を上記一端に備え、 短絡等の大電流時に は可動接点台と限流接点台間の反発力、 および固定導体と限流接 点台間の反発力を偶力と して回転し、 限流接点と可動接点を開離 させる。 A circuit breaker according to the present invention comprises a fixed conductor having a power supply terminal at one end and a load terminal at the other end, a fixed conductor having one end connected to the power supply terminal and a conductive connection means at the other end, Is connected to the conductive connecting means, faces the fixed conductor, has a current-limiting contact at the other end, and is rotatably supported at a central portion thereof. And a movable contact base having a movable contact opposed to the current limiting contact. The movable contact block is connected to an opening / closing mechanism to perform opening / closing and tripping operations. The tripping operation of the opening / closing mechanism is performed by a tripping device that detects an overcurrent in the electric circuit from the movable contact block to the load side terminal and causes the opening / closing mechanism to perform the tripping operation. Will be The current limiting contact block has a repulsion portion at one end for generating a repulsive force due to a reverse current between the fixed conductor and the fixed conductor. When a large current such as a short circuit occurs, the repulsive force between the movable contact block and the current limiting contact block, and It rotates with the repulsive force between the fixed conductor and the current limiting contact point as a couple, and separates the current limiting contact and the movable contact.
上記構成によ り反発部と固定導体との間で発生した反発力をす ベて限流接点台を回輊させる力と して用いる こ とができ、 開離速 度を速める こ とができ る。 また、 限流接点台は固定導体と導電接 続されているので、 これらの間のアークの発生がないため、 限流 接点台と固定導体との距離を縮める こ とができ る。  With the above configuration, all the repulsion generated between the repulsion portion and the fixed conductor can be used as a force for rotating the current-limiting contact block, and the separation speed can be increased. You. Further, since the current limiting contact block is conductively connected to the fixed conductor, no arc is generated between them, so that the distance between the current limiting contact block and the fixed conductor can be reduced.
本発明によれば、 可動接点台と限流接点台間の反発力に加えて 導電接続ざれた固定導体と限流接点台間の反発力を利用して偶力 によ り限流接点台を回転させるので、 開極速度が速く 、 限流効果 に優れ、 しかも小形な回路遮断器を得る こ とができ る。  According to the present invention, in addition to the repulsive force between the movable contact block and the current limiting contact block, the current limiting contact block is formed by couple using the repulsive force between the fixed conductor and the current limiting contact block that are conductively connected. Since the motor is rotated, it is possible to obtain a small circuit breaker having a high opening speed, an excellent current limiting effect, and a small size.
図面の簡単な説明 BRIEF DESCRIPTION OF THE FIGURES
第 1 図は本発明の第 1 実施例における回路遮断器の構成を示す 側断面図， 第 2図， 第 3図はそれぞれ本実施例の回路遮断器の主 要部の反発状態， ト リ ップ状態を示す側面図， 第 4図は本発明の 第 2実施例における回路遮断器の主要部の構成を示す側面図， 第 5図は本発明の第 3実施例における回路遮断器のま要部の構成を 示す側面図， 第 6図は本発明の第 4実施例における回路遮断器の 主要部の構成を示す側面図， 第 7図は本発明の第 5実施例を示し ( ) . ( b ) ， （ c ) はそれぞれ主要部の側断面図， 限流接点 台の斜視図， および限流接点台の断面図， 第 8図は本実施例の変 形例を示し、 （ a ) , ( b ) はそれぞれ主要部の側面図， および 限流接点台の断面図， 第 9図は本発明の第 6実施例を示し、 （ a ) , ( b ) はそれぞれ構成を示す側断面図および摺動部の断面図， 第 1 0図， 第 1 1 図はそれぞれ本発明の第 7実施例の主要部の側 面図および斜視図， 第 1 2図は本発明の第 8実施例を示し、 （ a ) , ( b ) , ( c ) はそれぞれ i要部の底面図， ずれの状態を示す 主要部の底面図， およびずれの拡大図， 第 1 3図は本実施例の変 形例の底面図， 第 1 4図， 第 1 5図， 第 1 6図はそれぞれ本発明 の第 9実施例の側断面図， 主要部の反発状態の側面図， および主 要部の ト リ ップ状態の側面図， 第 1 7図は本発明の第 1 0実施例 を示し、 （ a ) , ( b ) , ( c ) , ( d ) はそれぞれ、 構成を示 す側断面図， 磁気駆動装置 8 0の断面図， 磁気駆動裝 g 8 0 aの 断面図， および磁気駆動装置 8 0の変形例の断面図， 第 1 8図は 本発明の第 1 1 実施例の構成を示す側断面図， 第 1 9図は本発明 の第 1 2実施例の生要部を示す側面図である。 FIG. 1 is a side sectional view showing the configuration of a circuit breaker according to a first embodiment of the present invention, and FIGS. 2 and 3 are repulsive states of main parts of the circuit breaker according to the present embodiment, respectively. FIG. 4 is a side view showing a configuration of a main part of a circuit breaker according to a second embodiment of the present invention. FIG. 5 is a side view showing a circuit breaker according to a third embodiment of the present invention. FIG. 6 is a side view showing a configuration of a main part of a circuit breaker according to a fourth embodiment of the present invention, and FIG. 7 is a fifth embodiment of the present invention. b) and (c) are side sectional views of the main part and current-limiting contact, respectively. Fig. 8 shows a modified example of this embodiment. Fig. 8 (a) and (b) show the side view of the main part and the cross section of the current limiting contact block, respectively. Fig. 9 and Fig. 9 show a sixth embodiment of the present invention. (A) and (b) are side sectional views and a sectional view of a sliding portion, respectively, showing the structure. Figs. 10 and 11 are respectively FIG. 12 shows a side view and a perspective view of a main part of a seventh embodiment of the present invention, and FIG. 12 shows an eighth embodiment of the present invention, wherein (a), (b), and (c) denote main parts of i, respectively. Bottom view, bottom view of main part showing the state of misalignment, enlarged view of misalignment, Fig. 13 is bottom view of modified example of this embodiment, Fig. 14, Fig. 15 and Fig. 16 Is a side sectional view of the ninth embodiment of the present invention, a side view of a main part in a rebound state, and a side view of a main part in a trip state. FIG. 17 is a tenth embodiment of the present invention. Where (a), (b), (c) and (d) are The side sectional view showing the configuration, the sectional view of the magnetic drive unit 80, the sectional view of the magnetic drive unit 80a, and the sectional view of a modification of the magnetic drive unit 80 are shown in FIGS. Fig. 19 is a side sectional view showing the configuration of the eleventh embodiment of the present invention, and Fig. 19 is a side view showing the essential parts of the eleventh embodiment of the present invention.
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
以下本発明の実施例を第 1 図〜第 1 9図によ り説明する。  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 19.
本発明の第 1 実施例を第 1 図〜第 3図によ り説明する。  A first embodiment of the present invention will be described with reference to FIGS.
本実施例の回路遮断器の構成は次の通りである。  The configuration of the circuit breaker of the present embodiment is as follows.
筐体と してのケース 1 にはその一端に電源側端子 1 5が設けら れ、 他端には負荷側端子 2 8が設けられる。 ケース 1 の底部には 電源側端子 1 8 に接続された固定導体 1 5が設けられ、 この固定 導体 1 5の上方には限流接点台 1 2がビン 1 7 によ り回動自在に 支持されている。 限流接点台 1 2 はその一端 1 2 b に限流接点 1 1 が設けられ、 その他端に形成された反発部 1 2 aには固定導体 1 5 との導電接続手段と しての可揍導体 1 4が設けられる。 限流 接点台 1 2の上方には可動接点台 9が設けられ、 この可動接点台 9 は閗閉機構部 4に接続される。 閲閉機構 4はハン ドル 3 によ る 手動操作または、 オイルダッシュボッ ト リ レー 5 と、 これによ り 吸引される可動鉄片 1 9 よ り な 引き外し装匿と しての過電流検 出リ レーの動作によ り 、 可動接点台 9の閲閉動作または引外し動 作を行う。 The case 1 as a housing is provided with a power supply side terminal 15 at one end and a load side terminal 28 at the other end. A fixed conductor 15 connected to the power supply terminal 18 is provided at the bottom of case 1. Above the conductor 15, a current limiting contact stand 12 is rotatably supported by a bin 17. The current limiting contact base 1 2 has a current limiting contact 11 at one end 12 b, and a repulsive portion 12 a formed at the other end can be used as a conductive connection means with the fixed conductor 15. A conductor 14 is provided. A movable contact stand 9 is provided above the current limiting contact stand 12, and the movable contact stand 9 is connected to the closing mechanism 4. The opening / closing mechanism 4 is manually operated with the handle 3 or an overcurrent detection is performed as an oil dash-bot relay 5 and a movable iron piece 19 which is sucked by the movable iron piece 19 to conceal a trip. By the operation of the relay, the movable contact block 9 is closed or tripped.
各部の動作を以下に説明する。  The operation of each unit will be described below.
，， O N " 、 " O F F " の操作はモール ドカバー 2 よ り突出した 操作ハン ドル 3によ り行う。 ハン ドル 3を電源側に移動する こ と によ り 、 ト グルリ ンク機構を有する開閉機構部 4の 2節リ ンクが 働き、 開閉機構部 4の一端に位置して 3極分の可動接点台 9 を回 転する連動軸 7が回転する。 この連動軸 7の反時計方向の回転に よ り可動接点台 9はビン 1 6 を回転中心と して全体が移動し、 こ れによ り可動接点台 9の一端に位 gする可動接点 1 0が、 これと 対向する限流接点 1 1 に当接する位匿まで移動する。 限流接点 1 1 を一端に持つ限流接点 1 2 は可動接点台 9に対向する方向で開 閉機構部 4の下部に配匿される。 ピン 1 7は限流接点台 1 2の回 転中心を保持し、 このビン 1 7 に設けられた戻しパネ 1 3は限流 接点台 1 2を時計方向に付勢する。 この戻しバネ 1 3は、 その一 端がモール ドケース 1 に係合され、 他端が限流接点台 1 2の反発 部 1 2 aに係合する。 この限流接点台の反発部 1 2 aの一端には 可撓銅燃線よ り成る可棱導体 1 4が接続され固定導体 1 5から限 流接点台 1 2へ電流を供給する。 固定導体 1 5 よ り伸びた並行部 1 5 aは限流接点台 1 2の反発部 1 2 a と対向する位置でその下 部に並行して位 gする。 これによ り限流接点台 1 2を流れる電流 の向きは固定導体 1 5および可動接点台 9 を流れる電流の向きと 逆になる。 可動接点 1 0 と限流接点 1 1 との接点圧力は、 可動接 点台 9の回転中心となる ビン 1 6を同軸とする接点バネ 8によつ て供給される。 可動接点台 9は、 これに接続された可撓導体 8 8 a とコ イル部 8 8 b とよ り なる電路 8 8を介して負荷側端子 2 8 に接統される。 オイルダッシュポッ ト リ レー部 5は、 ブランジャ,, ON "and" OFF "are operated by the operation handle 3 which protrudes from the mold cover 2. By moving the handle 3 to the power supply side, the opening / closing mechanism having a toggle link mechanism is provided. The two-joint link of the part 4 works, and the interlocking shaft 7 that rotates the movable contact stand 9 for three poles located at one end of the opening / closing mechanism part 4 rotates. Therefore, the movable contact block 9 moves as a whole with the bin 16 as the center of rotation, whereby the movable contact 10 positioned at one end of the movable contact block 9 becomes a current-limiting contact 1 facing the movable contact block 9. It moves to the position where it comes into contact with 1. The current limiting contact 1 2 having one end of the current limiting contact 1 1 is concealed below the opening / closing mechanism 4 in the direction facing the movable contact stand 9. Pin 1 7 Holds the rotation center of the current limiting contact block 1 2, and the return panel 13 provided in this bin 17 urges the current limiting contact block 1 2 clockwise. The return spring 1 3, (i) The One end is engaged with the mold case 1, and the other end is engaged with the repulsion portion 12 a of the current limiting contact block 12. One end of the repulsion portion 12a of this current limiting contact block is connected to a flexible conductor 14 made of a flexible copper fuel wire, and supplies a current from the fixed conductor 15 to the current limiting contact block 12. The parallel portion 15a extending from the fixed conductor 15 is positioned parallel to the lower portion at a position facing the repulsion portion 12a of the current limiting contact block 12. As a result, the direction of the current flowing through the current limiting contact block 12 is opposite to the direction of the current flowing through the fixed conductor 15 and the movable contact block 9. The contact pressure between the movable contact 10 and the current-limiting contact 11 is supplied by a contact spring 8 having the bin 16 serving as the center of rotation of the movable contact stand 9 and having a coaxial axis. The movable contact stand 9 is connected to the load-side terminal 28 via an electric path 88 composed of a flexible conductor 88a and a coil section 88b connected thereto. Oil dash pot relay section 5
(図示せず） を内蔵したシリ ンダ 5 a と、 電路 8 8のコイル部 8 8 と、 シリンダ 5 a に吸引される可動鉄片 1 9 とによ り構成さ れる。 電路 8 8に過電流が流れる と、 オイルダッシュボッ ト リ レ 一部 5の内部のプランジャー （図示せず） が上昇して可動鉄片 1 9が吸引されて回動する。 この可動鉄片 1 9の動きが機構部分に 伝達ざれて ト リ ップ動作が行なわれる。 (Not shown), a coil part 88 of an electric circuit 88, and a movable iron piece 19 attracted to the cylinder 5a. When an overcurrent flows through the electric circuit 88, a plunger (not shown) inside the oil dash bot relay part 5 rises, and the movable iron piece 19 is sucked and rotated. The movement of the movable iron piece 19 is transmitted to the mechanism, and the trip operation is performed.
今、 短絡事故によ り大電流が遮断器内に流れた場合、 固定導体 If a large current flows in the circuit breaker due to a short circuit accident, the fixed conductor
1 5の並行部 1 5 a と限流接点台 1 2の反発部 1 2 a との間と、 限流接点台 1 2の限流接点 1 1 が設けられた一端 1 2 b と可動接 点台 9 との ¾との 2箇所で、 短絡電流の向きが逆になり 、 これに よ り電磁反発力が生まれる。 これによ り 、 限流接点台 1 2 は回転 中心となるビン 1 7 に対して偶力と して反時計方向に高速開離さ れる。 この状態を第 2図に示す。 15 Between the parallel part 15a and the repulsive part 12a of the current limiting contact block 12 and the one end 1 2b provided with the current limiting contact 11 of the current limiting contact base 12 and the movable contact At two points, 台 and 台, the direction of the short-circuit current is reversed, so that an electromagnetic repulsion is generated. As a result, the current limiting contact block 1 2 rotates. The bin 17 is opened at high speed in the counterclockwise direction as a couple with respect to the center bin 17. This state is shown in FIG.
遮断が完了する と、 第 3図に示すよ う に限流接点台 1 2は戻し パネ 1 3の弾性力によ り元の位匿に復帰する。  When the cutoff is completed, the current limiting contact block 12 returns to the original position by the elastic force of the return panel 13 as shown in FIG.
本実施例では並行部 1 5 aが固定されているので反発部 1 2 a と並行部 1 5 a との間で発生した反発力がすべて限流接点台 1 2 を回転させる力となる。 また、 固定導体 1 5 と限流接点台 1 2 と が可棱導体 1 4で接続されているので、 この部分でのアーク発生 によ る電流の滅少がな く 、 反発部 1 2 a と並行部 1 5 a間の反発 力を増加させる こ とができ る。 そのため、 限流接点台 1 2の開極 速度を従来のものよ り大き く でき る。 また、 固定導体 1 5 と限流 接点台 1 2 とを接近させる こ とができ、 回路遮断器の小形化を図 る こ とができ る。  In this embodiment, since the parallel portion 15a is fixed, all the repulsive force generated between the repulsive portion 12a and the parallel portion 15a becomes a force for rotating the current limiting contact stand 12. Further, since the fixed conductor 15 and the current-limiting contact block 12 are connected by the conductor 14, there is no decrease in current due to arc generation at this portion, and the repulsion section 12 a The repulsion between the parallel parts 15a can be increased. Therefore, the opening speed of the current limiting contact block 12 can be made higher than the conventional one. Also, the fixed conductor 15 and the current-limiting contact block 12 can be brought close to each other, and the circuit breaker can be downsized.
本発明の第 2実施例を第 4図によ り説明する。  A second embodiment of the present invention will be described with reference to FIG.
本実施例は、 限流接点 1 1 の開極スピー ドを更に高めるため、 反発部 1 2 a に延長部 1 2 c を接続し 、 電磁反発動作を行うため の電流方向が異なる並行導体間距離を長く したものである。 但し 単に長く するのでは接点の開極が取れないのて、 接続部を ヒンジ 2 2 と可撓導体 2 4 とで構成し、 折れ曲がる構造と したものであ る。  In this embodiment, in order to further increase the opening speed of the current limiting contact 11, the extension portion 12 c is connected to the repulsion portion 12 a, and the distance between the parallel conductors in which the current direction for performing the electromagnetic repulsion operation is different. Is made longer. However, since the contact cannot be opened by simply increasing the length, the connecting portion is constituted by the hinge 22 and the flexible conductor 24, and has a bent structure.
本発明の第 3実施例を第 5図によ り説明する。  A third embodiment of the present invention will be described with reference to FIG.
本実施例は限流接点台 1 2の反発部 1 2 aが固定導体 1 5の並 行部 〗 5 a に形成された閉口部 2 0 にその一部分が入り込めよ う 構成したものである。 これは、 開口部 2 0の両側の縁と反発部 1 2 aの側面との間の反発力によ り可動接点 1 0 と限流接点 1 1 の 接点圧力を上げるこ となく 、 中間電流での接点ジャンプを低く押 さえ、 遮断等の大電流が流れた場合についてのみ偶力が作用する 電磁反発限流機構を動作させるものである。 この実施例では、 短 絡でも小電流の短絡領域では、 従来の可動接点 1 0 と限流接点 1 1 部分の電流集中による反発レベルで十分遮断を行える。 この頜 域では電極反発の偶力作用は少な く 、 大電流時に限流接点台が少 しの動作によ り固定導体 1 5の開口部 2 0 よ り若干浮き上がるこ とによ り 、 反発力の方向が変化し、 偶力反発を生じる方向となる よ うな構造と したものである。 In this embodiment, a part of the repulsion part 12 a of the current limiting contact base 12 can enter the closed part 20 formed in the parallel part〗 5 a of the fixed conductor 15. It is composed. This is because the repulsive force between the edges on both sides of the opening 20 and the side surface of the repulsion portion 12a does not increase the contact pressures of the movable contact 10 and the current-limiting contact 11 and increases the intermediate current. The contact jump is kept low and the electromagnetic repulsion current limiting mechanism is activated only when a large current such as interruption occurs. In this embodiment, even in the short-circuit region where the current is small even in the case of short-circuiting, sufficient interruption can be performed at the repulsion level due to current concentration of the conventional movable contact 10 and current-limiting contact 11. In this region, the couple action of the electrode repulsion is small, and when the current is large, the current limiting contact base is slightly lifted from the opening 20 of the fixed conductor 15 due to a small operation, so that the repulsive force is increased. The direction is changed so that the couple rebounds.
本発明の第 4実施例を第 6図に示す。 固定導体 1 5の電源側端 子 1 8 に近い部分は限流接点台の一端 1 2 b と電流の流れる方向 が異方向となっているため、 偶力の形態で生まれた電磁反発力を 妨げる方向に働く力が生まれる。 この力をなく すため、 本実施例 ては固定導体 1 5の上に磁気吸収板 2 5 を配置する こ とによ り 、 逆効果分の磁気力を吸収している。 さ らに固定導体 1 5の電源側 端子 1 8側に開口部 2 3を設け、 限流接点台 1 2の一端 1 2 b を もぐり込ませるこ とによ り接点台が移動した反発状態において磁 気吸収板 2 5に磁気力保持の作用をさせる こ とができる。 第 6図 に示す通り限流接点台 1 2の一端 〗 2 bが固定導体の開口部 2 3 及び、 磁気吸収板 2 5の穴部 2 3 よ り下位に位箧した場合、 すで に琉れている短絡電流によ り限流接点台 1 2 bの側面と固定導体 1 5 との間で磁気反発力が生まれる。 これによ り、 限流接点台は 戻ろ う とする力に対してその反発力が電磁気的保持力と して作用 を及ぼし磁気ロック と しての効果が生まれる。 FIG. 6 shows a fourth embodiment of the present invention. The portion of the fixed conductor 15 close to the power supply terminal 18 has a different direction of current flow from one end 1 b of the current-limiting contact block, which prevents electromagnetic repulsion generated in the form of couple. The force that works in the direction is born. In order to eliminate this force, in the present embodiment, a magnetic absorbing plate 25 is disposed on the fixed conductor 15 to absorb a magnetic force corresponding to the reverse effect. In addition, an opening 23 is provided on the terminal 18 side of the fixed conductor 15 on the power supply side, and one end 12 b of the current-limiting contact block 12 is penetrated. The magnetic absorption plate 25 can be made to maintain magnetic force. As shown in Fig. 6, when one end 2b of current-limiting contact block 12 is positioned lower than opening 23 of the fixed conductor and hole 23 of magnetic absorption plate 25, it is already Current limiting contact block 1 2 b side and fixed conductor due to short-circuit current Magnetic repulsion is generated between 1 and 5. As a result, the repulsive force of the current limiting contact block acts as an electromagnetic holding force with respect to the returning force, thereby producing an effect as a magnetic lock.
本発明の第 5実施例を第 7図、 第 8図によ り説明する。  A fifth embodiment of the present invention will be described with reference to FIGS.
本実施例は限流接点台 1 2 を平板状にして反発力を増加させる と ともに、 反発力によ る変形防止のため補強を設けたものである , 本実施例のま要部の構成を第 7図 （ a ) に、 限流接点台の構成を 同図 （ b ) に、 主要部の A A断面を同図 （ c ) にそれぞれ示す。 本実施例では第 7図 （ b ) に示すよ う に限流接点台 1 2 は平板 状に形成され、 これに直角に補強 3 0がかしめによ り固定される 限流接点台 1 2は、 第 7図 （ c ) に示すよ う に、 固定導体 1 5 と 同じ幅を有し、 これによ り反発部 1 2 aが並行部 1 5 aから受け る反発力を大幅に増加ざせられる よ う構成されている。  In the present embodiment, the current limiting contact block 12 is made flat to increase the repulsion force, and reinforcement is provided to prevent deformation due to the repulsion force. Fig. 7 (a) shows the configuration of the current limiting contact block, and Fig. 7 (b) shows the main section of the AA. Fig. 7 (c) shows the main section. In this embodiment, as shown in FIG. 7 (b), the current limiting contact block 12 is formed in a flat plate shape, and the reinforcement 30 is fixed at right angles thereto by caulking. As shown in FIG. 7 (c), it has the same width as the fixed conductor 15 so that the repulsion force received by the repulsion portion 12a from the parallel portion 15a can be greatly increased. It is configured as follows.
なお、 他の構成は第 1 実施例と同様である。  Other configurations are the same as in the first embodiment.
本実施例の変形例を第 8図によ り説明する。  A modification of the present embodiment will be described with reference to FIG.
本変形例は、 第 8図 （ a ) に示すよ う に 流接点台 1 2の両縁 を折り 曲げて立上り部 1 2 d を形成して補強と したものである。 本変形例では、 主要部の断面は第 8図 （ b ) に示される よ う に U 字形断面となる。 本変形例では曲げによ り補強を形成でき、 部品 製作工数を低減できる。  In this modified example, as shown in FIG. 8 (a), both edges of the flow contact stand 12 are bent to form a rising portion 12d for reinforcement. In this modification, the cross section of the main part is a U-shaped cross section as shown in FIG. 8 (b). In this modified example, the reinforcement can be formed by bending, and the number of man-hours for manufacturing parts can be reduced.
本発明の第 6実施例を第 9図によ り説明する。  A sixth embodiment of the present invention will be described with reference to FIG.
本実施例は導電接続手段と して固定導体 ] 5に接続された摺動 部 3 6 を設け、 こ の摺動部 3 6 と限流接点台 1 2 の反発部 1 2 a を延長して設けられた接触部 1 2 e とが接触し電気的導通を保つ, 本実施例の Q N状態の限流接点台 1 2の位置、 および反発時の限 流接点台 1 2の位置を、 それぞれ実線および 2点鎖線で第 9図 ( a ) , ( b ) 中に示す。 本実施例では反発動作時に接触部 1 2 eが摺動部 3 6 と電気的導通を保ちながら摺動する。 In this embodiment, a sliding portion 36 connected to the fixed conductor 5 is provided as a conductive connecting means, and the sliding portion 36 and the repulsive portion 12 a of the current-limiting contact base 12 are provided. Contact with the contact part 1 2 e provided to extend and maintain electrical continuity, the position of the current limiting contact block 12 in the QN state of this embodiment, and the position of the current limiting contact block 1 2 in the case of rebound. Are shown in FIGS. 9 (a) and 9 (b) by a solid line and a two-dot chain line, respectively. In the present embodiment, the contact portion 12e slides while maintaining electrical continuity with the sliding portion 36 during the repulsion operation.
他の構成は第 1 実施例と同様である。  Other configurations are the same as in the first embodiment.
本実施例では眼流接点台 1 2の発熱を接触部 1 2 e および摺動 部 3 6を介して固定導体 1 5に伝達でき、 溫度上昇を低く する こ とができ る。  In the present embodiment, the heat generated by the intraocular flow contact stand 12 can be transmitted to the fixed conductor 15 via the contact portion 12e and the sliding portion 36, and the temperature rise can be reduced.
本発明の第 7実施例を第 1 0図、 第 1 1 図によ り説明する。 こ の実施例は、 特に直流電源に対する通電閲閉及び遮断性能に対す る遮断距離確保の面を考慮したものである。  A seventh embodiment of the present invention will be described with reference to FIG. 10 and FIG. This embodiment particularly considers the aspects of closing and energizing the DC power supply and ensuring the cutoff distance for the cutoff performance.
また、 限流反発锥造を有する接点部分において、 特に通電閎閉 時、 及び遮断時に小形化と合わせて遮断距離を確保させる：： とを 考慮しており 、 さ らに、 交流性能面でも効果のある開閉機構部分 を提供するものである。  In addition, in the contact part with current limiting repulsion structure, especially when energizing, closing, and breaking, the breaking distance is secured together with the miniaturization:: and it is also effective in terms of AC performance. The opening and closing mechanism is provided.
また、 更に、 限流遮断性能の向上を考慮したものであ り 、 電磁 反発した接点台を反発位 gで全遮断完了まで位置を保持するもの である。  Further, in consideration of the improvement of the current limiting interrupting performance, the position of the contact block that has repelled the electromagnetic force is held at the repulsive position g until the complete interruption is completed.
また、 限流開閉機構部分を他の絶縁モール ドケース 5 8 に包み 2重の絶縁構造とする こ とで、 遮断時に発生するアークによる損 傷及び溶融物付着をなく し、 信頼性の高い閲閉機構部を提供する ものである。 すなわち、 この実施例は、 ハン ドル操作によ る開閉動作に伴い - 電磁反発によ り動作する接点台を遮断距離確保のために動かし、 短絡電流等の大電流の流れた場合の反発動作と合わせて開閉動作 時においても限流接点台を反発方向に動かすよ う に したものであ る。 In addition, the current-limiting switching mechanism is wrapped in another insulating mold case 58 to form a double insulating structure, which eliminates damage due to arcs generated at the time of interruption and adhesion of molten material, and provides highly reliable closing. It provides a mechanism. In other words, in this embodiment, the contact block operated by electromagnetic repulsion is moved to secure the breaking distance in accordance with the opening / closing operation by the handle operation, and the repulsion operation when a large current such as a short-circuit current flows. At the same time, the current limiting contact block is moved in the direction of repulsion even during opening and closing operations.
さ らに、 各相に設けた電磁反発用の接点台を各極同時に連動ざ せて、 直流電源での遮断距離確保と合わせて交流性能電源での 3 相同時反発機構を持たせ限流性能の向上を図ったものである。 可 動接点台 1 2は各極を貫通する 2本の絶縁軸 1 7 、 5 4によ り 2 箇所が継がれ、 3相一体でビン 1 7を中心に回動ざれる。  In addition, the contact block for electromagnetic repulsion provided for each phase is linked simultaneously with each pole, and the three-phase simultaneous repulsion mechanism is provided for the AC performance power supply in addition to securing the cutoff distance with the DC power supply. It is intended to improve the quality. The movable contact block 12 is connected at two locations by two insulating shafts 17 and 54 penetrating through each pole, and is rotated around the bin 17 in a three-phase unit.
又、 " O N " 、 " O F F " 開閉を行う開閉機構部 4で連動軸 7 にカシメされた可動フ レ ーム 5 7部分に可動接点台の回転中心と なる ビン 1 6を共有する金具 5 6を有し、 可動フ レーム 5 7の回 動によ り連動軸 7の回耘と同様で動く 。 連結部材と しての金具 5 6は他の一端を、 反発連動する接点台 1 2を 3相結合する絶縁軸 5 4 と係合している。 よ って、 可動フ レーム 5 7の時計方向の回 転によ り絶緣軸 5 4が持ち上げられ 3相分の限流接点台 1 2は回 転中心の絶縁軸 1 7を中心に反時計方向へ回転する。 これによ り 開極動作時における限流接点台をほぼ反発時と同様の位置まで動 かし遮断距離を確保する。 戻り力は中央極に設けられ、 軸 5 5に 支持された戻しバネ 1 3 によ り 3相同時に戻される。 " 〇 K " 操 作は" O F F " (開極） 動作と反対に可動フ レ ー ム 5 7が反時計 方向に回転する こ とによ り限流接点台は上部へ移動し可動接点 9 と接触する。 "ON", "OFF" Opening / closing mechanism 4 that opens and closes 4 The movable frame 5 caulked to the interlocking shaft 7 The metal part 5 6 that shares the bin 16 serving as the center of rotation of the movable contact block in the portion 7 With the rotation of the movable frame 57, it moves in the same manner as the till of the interlocking shaft 7. The other end of the metal fitting 56 as a connecting member is engaged with an insulating shaft 54 that connects the repulsively linked contact block 12 in three phases. Thus, the clockwise rotation of the movable frame 57 raises the absolute shaft 54, and the current-limiting contact blocks 12 for three phases counterclockwise around the insulating shaft 17 at the center of rotation. To rotate. In this way, the current limiting contact block during opening operation is moved to almost the same position as at the time of repulsion to secure the breaking distance. The return force is provided at the center pole, and the three phases are simultaneously returned by the return spring 13 supported on the shaft 55. The operation of "〇K" is "OFF" (opening). In contrast to the operation, the movable frame 57 rotates counterclockwise, and the current-limiting contact block moves to the upper part and the movable contact 9 Contact with.
これによれば、 各極に設けた可動接点台は軸 1 7、 54によ り 3相分を一体構造とされ、 電磁反発時には各極に流れた電流によ つ て生じた電磁力の総合和によ り接点台を動作させる。 又、 直流電 源の閣極に対しては可動接点と照流接点間の遮断距離を大き く取 るため、 機構部分 4の可動フ レーム 57と 3相連動する軸との係 合を行い、 機構部分の開極動作によ り反発用接点も 3相同時にピ ン 1 7を回転中心と して反時計方向に回耘する。 これによ り遮断 距離は電磁反発を行った時と同様の寸法を閎極状態 O F Fで確保 する こ とができる。  According to this, the movable contact stand provided for each pole is integrated into three phases by shafts 17 and 54, and the total electromagnetic force generated by the current flowing to each pole at the time of electromagnetic repulsion is obtained. The contact block is operated by the sum. In addition, in order to increase the breaking distance between the movable contact and the illuminating contact for the DC power source, the movable frame 57 of the mechanical part 4 is engaged with the three-phase interlocking shaft. Due to the opening operation of the part, the repulsion contact is also cultivated counterclockwise using the pin 17 as the rotation center at the same time for the three phases. As a result, the same breaking distance as that obtained when the electromagnetic repulsion is performed can be secured in the negative electrode state OFF.
本発明の第 8実施例を第 1 2図、 第 1 3図によ り説明する。  An eighth embodiment of the present invention will be described with reference to FIGS.
本実施例は眼流接点台とビンのギャ ップによる限流接点台の横 ずれの防止を図る こ とによ り接点の接触不良を防止するものであ る。  The present embodiment is intended to prevent contact failure of the contacts by preventing lateral displacement of the current-limiting contact block due to the gap between the eye contact block and the bin.
本実旃例では、 ピン 1 7はフ レーム 6 2によ り保持され、 限流 接点台 1 2の回動面と直交する方向の動きはビン 1 7の両側にそ れぞれ設けられた突起 6 2 a、 6 2 bによ り規制ざれている。  In the present example, pin 17 is held by frame 62, and movement in the direction perpendicular to the turning surface of current limiting contact block 12 is provided on both sides of bin 17 respectively. It is not regulated by the projections 62a and 62b.
第 1 2図 （ a ) は、 陨流接点台 1 2の下側よ り見た図である。 限流接点台 1 2の回転支点であるビン 1 7の両側にフ レーム 6 2 よ りの突起 6 2 a , 6 2 bを設けてある。 この状態よ り限流接点 台 1 2が横にずれた状態が第 1 2図 （ b ) である。 同図では限流 接点第 1 2がビン 1 7を中心に反時計方向に横ずれを した状態を —点鎖線で示すが、 限流接点台 1 2はフ レーム 6 2の突起 6 2 a、 6 2 b と当接し、 これ以上横ずれを生じない。 この状態における ピン 1 7部分の拡大図が第 1 2図 （ c ) である。 正常状態では限 流接点台 1 2の中心位匱では、 ピン 1 7 とのギャ ップが Aである が、 一点鎖線に示す横ずれ状態の中心位蚩ではギヤ ッブが B とな る。 すなわち、 突起が両側にあるため、 ギャ ップ Bがあっても、 限流接点 8 は、 横ずれを規制されている。 同図のギャ ップは A > Bの関係になっているが、 対向する突起 6 2 a間の距離、 及び対 向する突起 6 2 b間の距離をそれぞれ限流接点台 1 2の板厚寸法 に取れば A = B まで規制する こ とができ る。 又、 ピンからの突起 6 2 a , 6 2 b までの距離を任意に取れるため、 突起 6 2 b画が 接点近傍に位置しなく とも横ずれの規制ができ、 アーク によ る絶 緣劣化を防止できる。 FIG. 12 (a) is a view as seen from below the convection contact stand 12. Protrusions 62 a and 62 b from the frame 62 are provided on both sides of the bin 17 which is the rotation fulcrum of the current limiting contact block 12. FIG. 12 (b) shows a state in which the current limiting contact block 12 is shifted laterally from this state. In the same figure, the current limiting contacts 1 and 2 are shown displaced counterclockwise around the bin 17 by the dashed-dotted line. The current limiting contact block 1 2 has the protrusions 6 2 a of the frame 6 2, Contact with 6 2 b, no more lateral displacement. An enlarged view of the pin 17 in this state is shown in FIG. 12 (c). In the normal state, the gap with the pin 17 is A at the central position of the current-limiting contact stand 12, but the gear is B at the central position of the lateral displacement state indicated by the dashed line. In other words, since the protrusions are on both sides, the current limiting contact 8 is restricted from lateral displacement even if there is a gap B. Although the gap in the figure has a relationship of A> B, the distance between the opposing projections 62a and the distance between the opposing projections 62b are respectively the plate thickness of the current limiting contact block 12. If dimensions are taken, it can be regulated up to A = B. In addition, since the distance from the pin to the projections 62a and 62b can be set arbitrarily, lateral displacement can be regulated even if the projection 62b is not located near the contact, preventing insulation deterioration due to arcing. it can.
フ レーム 6 2は絶緣部材であれば、 更に絶緣劣化の防止が向上 する。 又、 絶縁劣化防止のみであればピン 1 7の負荷に突起 6 2 aのみ設ける こ とによ り効果がある。 以上は、 限流接点台 1 2の 横ずれ防止の例をあげたが、 可動接点台 9 についても同様に実施 可能であ り 、 限流接点台 1 2が固定されている片反発形の回路遮 断器， 非限流形回路遮断器の可動接点台のみについて実施しても 同様の効果がある。  If the frame 62 is an insulating material, the prevention of the insulating deterioration is further improved. In addition, if only insulation deterioration is prevented, it is effective to provide only the protrusion 62 a on the load of the pin 17. The above is an example of preventing the lateral displacement of the current limiting contact block 12. However, the same can be applied to the movable contact block 9, and a one-sided repulsive circuit block to which the current limiting contact block 12 is fixed is provided. The same effect can be obtained by implementing only the movable contact blocks of breakers and non-current-limiting circuit breakers.
本実施例の変形例を第 1 3図によ り説明する。  A modification of the present embodiment will be described with reference to FIG.
本変形例は限流接点台 1 2の左端部分に左右のぶれ止めを行う ガイ ド ビン 6 4を限流接点台 1 2 にカシメ結合したものである。 サイ ド ビンのモール ド との当接部分は摺動して対処した球面形状 の 1 点当接と し、 摺動による摩擦係数を軽減する策を施したもの である。 In this modified example, a guide bin 64 for performing left and right blurring at the left end portion of the current limiting contact block 12 is caulked to the current limiting contact block 12. The abutment of the side bin with the mold is a spherical shape that slides In this case, measures were taken to reduce the coefficient of friction due to sliding.
本発明の第 9実施例を第 1 4図〜第 1 6図によ り説明する。 本実施例は、 限流接点台の回動中心の両側に生ずる電磁反発力 を偶力と して前記限流接点台を回動する電磁反発機構を少な く と も 2組備えたものである。 遮断器によって達成される。  A ninth embodiment of the present invention will be described with reference to FIGS. The present embodiment is provided with at least two sets of electromagnetic repulsion mechanisms for rotating the current limiting contact base by using the electromagnetic repulsive force generated on both sides of the rotation center of the current limiting contact base as a couple. . Achieved by circuit breakers.
本実施例は限流接点台 1 2の下方に、 ビン 7 1 に支持ざれて偶 力を利用して反発する第 2の限流接点台 7 2 を備えている。 この 限流接点台 1 2部の一端には可とう撚線 1 4が接続され、 その延 長は固定接点台 7 3の一端に接続されている。  In this embodiment, a second current limiting contact block 72 is provided below the current limiting contact block 12 and supported by the bin 71 and repelled by using a couple. A flexible stranded wire 14 is connected to one end of the current limiting contact block 12, and its extension is connected to one end of the fixed contact block 73.
固定接点台 7 3の他端には固定接点 7 4が配置され、 この固定 接点 7 4 と当接するよ うに、 可動接点 7 5が第 2の限流接点台 2 2に配 gされている。 ピン 7 1 には第 2限流接点台 7 2を反時計 方向に付勢するパネ 7 6 を備える。 ピン 7 1 に閬して、 第 2限流 接点台 7 2の可動接点 7 5 と反対側端には、 可と う撚線 1 4が接 続され、 その延長は固定導体 1 5の一端に接続されている。 限流 接点台 〗 2は、 ビン 1 7を中心と して回動可能で、 可動接点台 9 と限流接点台 1 2間の電磁反発力、 および限流接点台 1 2 と固定 導体 1 5間の電磁反発力を偶力と して回動するよう に配置構成さ れている。  A fixed contact 74 is arranged at the other end of the fixed contact base 73, and a movable contact 75 is arranged on the second current limiting contact base 22 so as to abut the fixed contact 74. The pin 71 is provided with a panel 76 for urging the second current-limiting contact block 72 counterclockwise. A flexible stranded wire 14 is connected to the other end of the second current limiting contact block 72 opposite to the movable contact 75 with the pin 71 connected, and the extension is connected to one end of the fixed conductor 15. It is connected. The current limiting contact block〗 2 is rotatable around the bin 17, the electromagnetic repulsion between the movable contact block 9 and the current limiting contact block 12, and the current limiting contact block 1 2 and the fixed conductor 15 It is arranged and configured to rotate with the electromagnetic repulsion between them as a couple.
また、 第 2限流接点台 7 2 は、 ビン 7 1 を中心と して回動可能 で、 固定導体 1 5 と第 2限流接点台 7 2間の電磁反発力、 および 固定接点台 7 3 と第 2限流接点台 7 2間の電磁反発力を偶力と し て回動するよ う に配 g構成ざれている。 The second current limiting contact block 72 is rotatable about the bin 71, so that the electromagnetic repulsion between the fixed conductor 15 and the second current limiting contact block 72 and the fixed contact block 7 3 And the second recurrent contact block 7 2 as the couple It is arranged so that it rotates.
第 1 5図の動作過程図に示すよう に、 短絡事故によ り 、 固定導 体 1 5を経由して大電流が遮断器内に流れた場合、 他の実施例と 同様に限流接点台 1 2はピン 1 7 を回動中心と して反時計方向に 回動し高速閲離される。 また、 固定導体 1 5 と第 2限流接点台 7 2の対向する反発部 7 2 b との間、 および、 第 2限流接点台 7 2 の回動中心に閬し、 反発部 7 2 b と反対側の端部 7 2 a と第 2固 定導体 7 3の固定接点側との問の 2箇所で、 電磁反発力が生まれ 第 2限流接点台 7 2 はビン 7 1 を回動中心と して時計方向に高速 で開離される。 遮断動作が完了する と、 第 1 限流接点台 1 2、 第 2限流接点台 7 2 は、 パネ 1 3、 7 1 によ り元の位置に復帰し、 開閉機構が働いて第 〗 6図の状態になる。  As shown in the operation process diagram of Fig. 15, when a large current flows into the circuit breaker via the fixed conductor 15 due to a short circuit accident, as in the other embodiments, 12 rotates counterclockwise about the pin 17 as a rotation center, and is quickly separated. Also, between the fixed conductor 15 and the opposing repulsive portion 7 2 b of the second current limiting contact block 7 2 and the center of rotation of the second current limiting contact block 7 2, the repulsive portion 7 2 b And the fixed contact side of the second fixed conductor 73, an electromagnetic repulsion force is generated at the second end of the second fixed conductor 73. As a result, it is opened at high speed in the clockwise direction. When the shut-off operation is completed, the first current limiting contact block 1 2 and the second current limiting contact block 7 2 return to their original positions by the panels 13 and 7 1, and the opening / closing mechanism operates to turn on the second current limiting contact block. The state is as shown in the figure.
この実施例によると、 限流接点台の開極スピー ドを大幅に向上 でき ると ともに、 2つの限流接点台によ り更にアーク電圧は 2倍 となるため、 大幅な限流性能の向上が図られる。  According to this embodiment, the opening speed of the current limiting contact block can be greatly improved, and the arc voltage is further doubled by the two current limiting contact blocks, so that the current limiting performance is greatly improved. Is achieved.
上記の構成においては、 遮断時に短絡電流が流れたときに、 回 路遮断器を開極させるための偶力を用いた電磁反発機構を 2箇所 に設ける こ とができ、 これによ り限流接点台を開極するスピー ド が増加する と共に開極距離が長く なり 、 アーク電圧が上昇し限流 効果を大幅に高める。  In the above configuration, when a short-circuit current flows at the time of interruption, an electromagnetic repulsion mechanism that uses a couple to open the circuit breaker can be provided at two locations, thereby limiting the current limit. As the speed of opening the contact block increases and the opening distance increases, the arc voltage increases and the current limiting effect is greatly enhanced.
本発明の第 1 0実施例を第 1 7図によ り説明する。  A tenth embodiment of the present invention will be described with reference to FIG.
本実施例は、 第 1 7図 （ a ) に示すよ うに限流接点台 1 2の限 流接点 1 1 と反対側の端部 1 2 b と対向する固定導体 1 5の並行 部 1 5 aに磁束保持手段を設けるこ とによ り、 磁気反発力及び反 発後の鬨極スピー ドを保持するものである。 更に磁束保持手段を 消弧室部分と反対側に設けて、 遮断時の溶融物飛散の影響防止し て、 動作の信頼性を向上させるものである。 In this embodiment, as shown in FIG. 17 (a), the fixed conductor 15 facing the end 12b opposite to the current limiting contact 11 of the current limiting contact block 12 is arranged in parallel. By providing the magnetic flux holding means in the portion 15a, the magnetic repulsive force and the speed of the repulsive pole after the repulsion are maintained. Further, a magnetic flux holding means is provided on the side opposite to the arc-extinguishing chamber portion to prevent the influence of the scattering of the molten material at the time of interruption, thereby improving the operation reliability.
磁束保持手段と しての磁気駆動装置 8 0は磁性体で形成され、 その AA断面は第 1 7図 （ b ) に示すように U字形断面を有して その内側底面付近に並行部 1 5 aが配設され、 並行部 1 5 aに対 向する位置に反発部 1 2 aが配設される。 大電流が流れた場合、 反発部 1 2 aを流れる電流によ り第 1 7図 （ b ) に細矢印で示す よう に反発部 1 2 aの周囲に時計方向の磁束が生じ る。 反発部 1 2 aは並行部 1 5 aとの反発によ り太矢印方向に 2点鎖線で示さ れる位 gまで移動する。 このときに、 磁束が磁気駆動装置 8 0内 を通るので移動中における磁束の減少を防止でき、 磁束によ る太 矢印方向の躯動力が保たれて反発部 1 2 aの移動速度が保持され る。 これによ り眼流接点台 1 2は開極後のスピー ドが保持され大 きな限流効果を得るこ とができる。  The magnetic drive device 80 as the magnetic flux holding means is made of a magnetic material, and its AA cross section has a U-shaped cross section as shown in FIG. 17 (b). a is disposed, and a repulsion portion 12a is disposed at a position facing the parallel portion 15a. When a large current flows, a clockwise magnetic flux is generated around the repulsion portion 12a by the current flowing through the repulsion portion 12a as shown by a thin arrow in FIG. 17 (b). The repulsion part 12a moves in the direction of the thick arrow to the position g indicated by the two-dot chain line due to the repulsion with the parallel part 15a. At this time, since the magnetic flux passes through the magnetic drive device 80, it is possible to prevent a decrease in the magnetic flux during the movement, and the moving force of the repulsion portion 12a is maintained by maintaining the driving force of the magnetic flux in the direction of the thick arrow. You. As a result, the speed of the ocular flow contact stand 12 after opening is maintained, and a large current limiting effect can be obtained.
また、 この磁気駆動装 S 8 0を、 機構部直下のモール ド壁 40 a , 4 0 b , 40 c内に配匱するこ とによ り遮断時の溶融物飛散 の動作への影響を防止でき、 信頼性を向上させる ことができ る。  In addition, by disposing the magnetic drive device S80 in the mold walls 40a, 40b, and 40c immediately below the mechanism, the influence on the operation of the molten material scattering when shut off is prevented. And reliability can be improved.
また、 隅流効果をよ り一屠向上させるために可動接点台 9と限 流接点台 1 2との間にも磁気駆動装箧 8 0 aを設けてもよい。 磁 気駆動装置 8 0 aも磁性体によ り形成され、 その B B断面は第 1 7図 （ c 〉 に示すよ うに U字形断面を有し、 可動接点台 9 と限流 接点台 1 2 を流れる電流によ り発生した磁束が、 その磁性体を通 る。 そのため可動接点台 9 と限流接点台 1 2の移動中の磁束の減 少が防止され開極後のスビ一 ドが保持される。 Further, a magnetic drive device 80a may be provided between the movable contact stand 9 and the current limit contact stand 12 in order to further improve the corner flow effect. The magnetic drive device 80a is also formed of a magnetic material, and its BB section has a U-shaped section as shown in FIG. The magnetic flux generated by the current flowing through the contact blocks 12 passes through the magnetic material. Therefore, a decrease in magnetic flux during movement of the movable contact block 9 and the current limiting contact block 12 is prevented, and the slide after opening is maintained.
なお、 本実施例において、 磁気駆動装匿 8 0を第 1 7図 （ d ) に示すよう に反発部 1 2 aの外周にコの字の形状で磁性板 8 2を 設け、 コアとのギャ ップ寸法 a を小さ く取って磁気駆動装置を有 効に作用させるよう構成してもよい。  In this embodiment, the magnetic drive shield 80 is provided with a U-shaped magnetic plate 82 on the outer periphery of the repulsion portion 12a as shown in FIG. A configuration may be adopted in which the top dimension a is made small so that the magnetic drive device works effectively.
本発明の第 1 1 実施例を第 1 8図によ り説明する。  The eleventh embodiment of the present invention will be described with reference to FIG.
本実施例は本発明の第 9実施例の回路遮断器の固定導体 1 5 と 固定接点台 7 3 とのそれぞれに磁束保持手段と しての磁気駆動装 匿 8 0 b , 8 0 c を設けたものである。  In this embodiment, magnetic drive shields 80b and 80c as magnetic flux holding means are provided on the fixed conductor 15 and the fixed contact block 73 of the circuit breaker of the ninth embodiment of the present invention, respectively. It is a thing.
本実施例では、 固定導体の並行部 1 5 a と第 2限流接点台 7 2 a との電磁反発力を利用する と ともに磁気駆動装 g 8 0 c によ り 接点 7 4、 7 5の開極スピー ドを高めるものである。  In the present embodiment, the electromagnetic repulsion force between the parallel portion 15a of the fixed conductor and the second current-limiting contact block 72a is used, and the contacts 74, 75 are formed by the magnetic drive device g80c. It increases the opening speed.
本発明の第 1 2実施例を第 1 9図によ り説明する。  A 12th embodiment of the present invention will be described with reference to FIG.
本実施例は固定導体 1 5の一端部分に固定接点台 7 8 を固定ね じ 9 7 によ って固定した構造の回路遮断器において、 固定接点台 7 8 を介して磁気駆動装置 8 0 b を固定導体 1 5 に固定する よ う にしたものである。  This embodiment is a circuit breaker having a structure in which a fixed contact block 78 is fixed to one end of a fixed conductor 15 with a fixed screw 97, and a magnetic drive device 80b is connected via the fixed contact block 78. Is fixed to the fixed conductor 15.
本実施例では、 磁気駆動装置によ り限流接点台の開極速度が速 ま る ので、 第 2の限流接点台 7 2の反発開始前に限流接点台 1 2 が反発する。 この時点においては限流接点台 1 2が可撓導体 1 4 および第 2の限流接点台 7 2を介して第 〗 の固定導体 1 5に電気 的に接続されている。 この磁気駆動装箧 8 0 b は固定ねじ 9 9 に よ り固定接点台 7 8 に固定される。 これによ り固定導体 1 5、 固 定接点台 7 8、 磁気駆動装置 8 O b よ りなる電源側導体部分を予 め組立ておいて 1 つの部品と しての状態で扱う こ とができ、 作業 性の向上を図れる効果がある。 なお、 第 1 0実施例のように固定 接点台 7 8がない場合は固定導体 1 5に磁気駆動装 gを固定して もよい。 In the present embodiment, since the opening speed of the current limiting contact block is increased by the magnetic drive device, the current limiting contact block 1 2 repels before the repulsion of the second current limiting contact block 72 starts. At this point, the current limiting contact block 12 is electrically connected to the 第 th fixed conductor 15 via the flexible conductor 14 and the second current limiting contact block 72. Connected. The magnetic drive device 80 b is fixed to the fixed contact block 78 by a fixing screw 99. As a result, the power-supply-side conductor portion consisting of the fixed conductor 15, the fixed contact block 78, and the magnetic drive device 8 Ob can be pre-assembled and handled as a single component. This has the effect of improving workability. When the fixed contact block 78 is not provided as in the tenth embodiment, the magnetic drive device g may be fixed to the fixed conductor 15.
また、 上記の如く 、 あ らかじめ組立てられた部品をケース内の 所定位置に入れてい く こ とによ り製品組立の自動化も図るこ とが でき る。  In addition, as described above, by assembling the pre-assembled parts into predetermined positions in the case, it is possible to automate the product assembly.
他の部品の構成、 動作は第 1 1 実施例と同様である。  The configuration and operation of the other components are the same as in the first embodiment.
以上の実施例において、 引き外し装置と してオイルダッシュポッ ト を用いた電磁式のものを開示したが、 引き外し裝 gはこれに限 るこ とはなく 、 電路の電流を変流器等で検出して電子回路によ り 磁気引き外し装 gを付勢する電子式のもの、 あるいはバイ メ タル 等を用いた熱動式のもの、 あるいはこれらを組み合わせたもので あってもよい。 なお、 電子式の場合には電路 8 8 は可動接点台に 接続された可撓導体 8 8 a と、 この可撓導体 8 8 a に接続されて 変流器部を通過して負荷側端子に至る導体部 （図示せず） とによ り構成され、 熱動式の場合は電路 8 8は可動接点台に接続された 可棱導体 8 8 a と、 この可撓導体 8 8 aに接続されてバイ メタル を過熱するよう配設されて負荷側端子に至る ヒータ部 （図示せず） とによ り構成される。 産業上の利用可能性 In the above embodiment, the electromagnetic type using an oil dashpot as the tripping device is disclosed. However, the tripping device g is not limited to this, and the current of the electric circuit is controlled by a current transformer or the like. It may be of an electronic type that detects and applies a magnetic tripping device g by an electronic circuit, or a thermodynamic type that uses bimetal or the like, or a combination thereof. In the case of the electronic type, the electric circuit 88 is connected to the flexible conductor 88a connected to the movable contact block and the flexible conductor 88a to pass through the current transformer and to the load terminal. In the case of the thermal type, the electric circuit 88 is connected to the movable conductor 88a connected to the movable contact block and to the flexible conductor 88a. And a heater (not shown) arranged to overheat the bimetal and reach the load side terminal. Industrial applicability
本発明によれば、 限流接点台を中央部で回動自在に支持し、 一 端を可動接点台と対向させ、 他端を固定導体と対向させて導電接 続手段によ り この固定導体と接続し、 可動接点台と限流接点台間 の電磁反発力、 及び固定導体と限流接点台間の電磁反発力を偶力 と して利用する構成と したので、 閲極スビー ドが速く なる と共に、 限流接点台と固定導体の間の寸法を小さ く する こ とができ、 限流 接点台の開極スピ一ドが高速で遮断性能に優れしかも小形な回路 遮断器を提供する こ とができ る。  According to the present invention, the current limiting contact base is rotatably supported at the center, one end is opposed to the movable contact base, and the other end is opposed to the fixed conductor. And the electromagnetic repulsion between the movable contact block and the current-limiting contact block and the electromagnetic repulsion between the fixed conductor and the current-limiting contact block are used as couples. At the same time, the dimension between the current limiting contact block and the fixed conductor can be reduced, and the opening speed of the current limiting contact block provides a high speed, excellent breaking performance, and a small circuit breaker. It can be.

Claims

請求の範囲 The scope of the claims
1 . 一端に電源側端子と他端に負荷側端子とを備えた筐体内に、 上記電源側端子に一端が接統ざれ他端に導電接続手段を備えた固 定導体と、 一端が上記導電接続手段に接続されて上記固定導体に 対向し他端に限流接点を備えて中央部で回動自在に支持され上記 固定導体との間に逆向電流によ る反発力を発生する反発部を上記 一端に備えた限流接点台と、 この限流接点台と対向して回動自在 に支持され上記限流接点に対向する可動接点を備えた可動接点台 と、 この可動接点台に接続されて開閉および引き外し動作を行う 開閉機構と、 上記可動接点台から上記負荷側端子に至る電路の過 電流を検出して上記開閉機構に引き外し動作を行わせる引き外し 装匿とを備えてなる ことを特徵とする回路遮断器。  1. In a housing having a power supply terminal at one end and a load terminal at the other end, a fixed conductor having one end connected to the power supply terminal and a conductive connection means at the other end; A repulsion portion connected to the connecting means, opposed to the fixed conductor, provided with a current-limiting contact at the other end, and rotatably supported at a central portion and generating a repulsive force between the fixed conductor and the fixed conductor; A current limiting contact base provided at one end; a movable contact base rotatably supported facing the current limiting contact base and having a movable contact facing the current limiting contact; and a movable contact base connected to the movable contact base. An opening / closing mechanism that performs opening / closing and tripping operations, and a tripping / concealment device that detects an overcurrent in an electric circuit from the movable contact block to the load side terminal and causes the opening / closing mechanism to perform a tripping operation. A circuit breaker characterized by that.
2 . 上記反発部はヒンジ部を有し、 屈曲自在に構成されたこ とを 特徴とする特許請求の範囲第 1 項記載の回路遮断器。 2. The circuit breaker according to claim 1, wherein the repulsion portion has a hinge portion and is configured to bend freely.
3 . 上記固定導体は上記反発部と並行して延びる並行部を備え、 上記並行部は閲ロ部を有して、 上記反発部が上記開口部内に位置 するよ う構成されたこ とを特徴とする特許請求の範囲第 1 項記載 の回路遮断器。  3. The fixed conductor includes a parallel portion that extends in parallel with the repulsion portion, the parallel portion includes an opening portion, and the repulsion portion is configured to be located in the opening. The circuit breaker according to claim 1, wherein
4 . 上記固定導体は、 上記限流接点の下方に閲ロ部を有し、 大電 流による反発時に上記限流接点台の上記限流接点を有する部分が 上記閎ロ部内に位置するよう構成されたこ とを特徴とする特許請 求の範囲第 1 項記載の回路遮断器。  4. The fixed conductor has a recessed portion below the current limiting contact, and a portion having the current limiting contact of the current limiting contact stand is located in the peripheral portion when the current is repelled by a large current. 2. The circuit breaker according to claim 1, wherein the circuit breaker is a patent claim.
5 . 上記限流接点台は上記固定導体とほぼ同一幅の平板状に形成 され、 補強部材が設けられて成る こ とを特徴とする特許請求の範 囲第 1 項記載の回路遮断器。 5. The current-limiting contact block is formed as a flat plate with almost the same width as the fixed conductor. The circuit breaker according to claim 1, wherein the circuit breaker is provided with a reinforcing member.
6 . 上記導電接続手段は上記固定導体の端部に設けられて上記限 流接触子の上記反発部側の端部と電気的接続を保つよう摺動する 摺動部であるこ とを特徵とする特許請求の範囲第 1 項記載の回路 遮断器。  6. The conductive connecting means is a sliding portion provided at an end of the fixed conductor and slid so as to maintain an electrical connection with the end of the current limiting contact on the side of the repulsive portion. The circuit breaker according to claim 1.
7 . 上記限流接点台をその略中央部で軸支する第 1 の軸と、 この 第 1 の軸に対して上記反発部側に設けられた第 2の軸と、 上記可 動接点台と上記閲閉機構との接続部と上記第 2の軸とを結ぶ連結 部材とを備え、 上記開閉機構によ る開動作時にも上記限流接点台 を反発方向に回耘させる よう構成されたこ とを特徴とする特許請 求の範囲第 1 項記載の回路遮断器。  7. A first shaft for supporting the current limiting contact base at a substantially central portion thereof, a second shaft provided on the repulsion portion side with respect to the first shaft, and the movable contact base. A connection member for connecting the connection portion with the closing mechanism and the second shaft, wherein the current limiting contact block is configured to be cultivated in the direction of repulsion even during the opening operation by the opening / closing mechanism. 2. The circuit breaker according to claim 1, wherein the circuit breaker is characterized by the following.
8 . 上記限流接点台は複数個設けられて、 上記第 1 の軸および第 2の軸が上記複数の限流接点台を結合する よ う設けられ、 上記開 閉機構によ る閲動作時に上記複数の限流接点台を同時に反発方向 に回 ¾させるよう構成されたこ とを特徴とする特許請求の範囲第 7項記載の回路遮断器。  8. A plurality of current limiting contact blocks are provided, and the first axis and the second axis are provided so as to connect the plurality of current limiting contact blocks, and are used when the opening / closing mechanism operates. 8. The circuit breaker according to claim 7, wherein the plurality of current limiting contact blocks are simultaneously rotated in the direction of repulsion.
9 . 上記限流接点台の回動面と直交する方向の動きを規制する規 制部材を備えたこ とを特徴とする特許請求の範囲第 1 項記載の回 路遮断 。  9. The circuit breaker according to claim 1, further comprising a regulating member that regulates a movement of the current limiting contact stand in a direction orthogonal to a rotation surface.
1 0 . —端に電源側端子と他端に負荷側端子とを備えた筐体内に、 上記電源側端子に一端が接続され他端に導電接続手段を備えた固 定導体と、 一端が上記導電接続手段に接続されて上記固定導体の 一方の面に対向し他端に第 2の限流接点を備えて中央部で回動自 在に支持された第 2の限流接点台と、 この第 2の限流接点台と対 向して配設ざれ一端に上記第 2の限流接点に対向する固定接点を 備え他端に第 2の導電接続手段を備えた固定接点台と、 一端が上 記第 2の導電.接統手段に接統されて上記固定導体の他の面に対向 し他端に限流接点を備えて中央部で回動自在に支持された限流接 点台と、 こ の限流接点台と対向して回動自在に支持され上記限琉 接点に対向する可動接点を備えた可動接点台と、 この可動接点台 に接続されて開閉および引き外し動作を行う開閉機構と、 上記可 動接点台から上記負荷側端子に至る電路の過電流を検出して上記 開閉機構に引き外し動作を行わせる引き外し装箧とを備え、 上記 限流接点台および上記第 2の限流接点台は上記固定導体との間に 逆向電流による反発力を発生する反発部をそれぞれの一端に備え てなるこ とを特徴とする回路遮断器。 1 0 .—A fixed conductor having one end connected to the power supply terminal and the other end provided with conductive connecting means, and The fixed conductor is connected to the conductive connecting means. A second current-limiting contact block having a second current-limiting contact at one end opposite to the other surface and rotatably supported at the center at a central portion; and facing the second current-limiting contact. A fixed contact block having a fixed contact at one end facing the second current limiting contact and a second conductive connecting means at the other end; and a second conductive end at one end. A current-limiting contact point base which is connected to the other surface of the fixed conductor and has a current-limiting contact at the other end and is rotatably supported at a central portion; A movable contact base rotatably supported and having a movable contact facing the limit contact, an opening / closing mechanism connected to the movable contact base for opening / closing and tripping operation, and a load from the movable contact base. A tripping device for detecting an overcurrent of the electric circuit reaching the side terminal and causing the switching mechanism to perform a tripping operation. A circuit breaker, characterized in that the second current limiting contact base is provided with a repulsion part at one end for generating a repulsion force by a reverse current between the fixed current conductor and the fixed conductor.
1 1 . 一端に電源側端子と他端に負荷側端子とを備えた筐体内に 上記電源側端子に一端が接続され他端に導電接続手段を備えた固 定導体と、 一端が上記導電接続手段に接続されて上記固定導体に 対向し他端に限流接点を備えて中央部で回動自在に支持された限 流接点台と、 この限流接点台と対向して回動自在に支持され上記 限流接点に対向する可動接点を備えた可動接点台と、 こ の可動接 点台に接続されて閲閉および引き外し動作を行う閲閉機構と、 上 記可動接点台から上記負荷側端子に至る電路の過電流を検出して 上記閲閉機構に引き外し動作を行わせる引き外し装置とを備え、 上記限流接点台の上記一端に上記固定導体との間に逆向電流によ る反発力を発生する反発部を備え、 上記反発部の近傍に上記反発 部の開離方向に沿って延びる磁束保持手段を配設したこ とを特徵 とする回路遮断器。 1 1. A fixed conductor having one end connected to the power supply terminal and the other end provided with conductive connection means, and one end connected to the conductive connection in a housing having a power supply terminal at one end and a load terminal at the other end. A current limiting contact base connected to the fixed conductor and facing the fixed conductor and having a current limiting contact at the other end and rotatably supported at a central portion; and rotatably supported opposite the current limiting contact base. A movable contact block provided with a movable contact facing the current limiting contact, a closing mechanism connected to the movable contact base to perform closing and releasing operations, and a load side from the movable contact base to the load side. A trip device that detects an overcurrent of the electric circuit reaching the terminal and causes the closing mechanism to perform a trip operation; The one end of the current limiting contact base is provided with a repulsion portion for generating a repulsion force due to a reverse current between the fixed current conductor and the fixed conductor, and a magnetic flux holding extending near the repulsion portion along the direction in which the repulsion portion is separated. A circuit breaker characterized by the provision of means.
1 2 . 上記固定導体は上記反発部と並行して延びる並行部を備え、 上記磁束保持手段は略 U字形断面を有して内部に上記反発部と上 記並行部とが配設されたこ とを特徵とする特許請求の範囲第 1 1 項記載の回路遮断器。  12. The fixed conductor has a parallel portion extending in parallel with the repulsion portion, and the magnetic flux holding means has a substantially U-shaped cross section, and the repulsion portion and the parallel portion are disposed inside. The circuit breaker according to claim 11, characterized by the following.
1 3 . —端に電源側端子と他端に負荷側端子とを備えた筐体内に、 上記電源側端子に一端が接続ざれた画定導体と、 上記固定導体の 一方の面で上記固定導体に一端が接続され他端に固定接点を備え た固定接点台と、 一端に上記固定接点に対向する第 2の限流接点 を備え他端に上記導電接続手段を備えて中央部で回動自在に支持 され上記固定導体との間に逆向電流によ る反発力を発生する反発 部を上記一端に備えた第 2の限流接点台と、 一端が上記導電接続 手段に接続されて上記固定導体の他の面に対向し他端に限流接点 を備えて中央部で回動自在に支持された限流接点台と、 この限流 接点台と対向して回動自在に支持され上記限流接点に対向する可 動接点を備えた可動接点台と、 この可動接点台に接続されて開閉 および引き外し動作を行う開閉機構と、 上記可動接点台から上記 負荷側端子に至る電路の過電流を検出して上記閲閉機構に引き外 し動作を行わせる引き外し装匿とを備え、 上記反発部の近傍で上 記反発部の開離方向に沿って延びる磁束保持手段を上記固定手段 と一体に配設したことを特徴とする回路遮断器。 1 3 .—In a housing provided with a power supply terminal at one end and a load terminal at the other end, a demarcated conductor whose one end is connected to the power supply terminal, and the fixed conductor on one surface of the fixed conductor A fixed contact base having one end connected and a fixed contact at the other end; a second current limiting contact at one end facing the fixed contact; and a conductive connection means at the other end; rotatable at the center. A second current-limiting contact block having a repulsive portion at one end thereof that is supported and generates a repulsive force between the fixed conductor and the fixed current; and one end of the fixed current conductor connected to the conductive connection means. A current-limiting contact point which is opposite to the other face and has a current-limiting contact at the other end and is rotatably supported at a central portion; and the current-limiting contact is rotatably supported opposite the current-limiting contact point. A movable contact block with a movable contact facing the surface, and an open / close and trip operation connected to this movable contact block An opening / closing mechanism for performing the operation, and a tripping / closing mechanism for detecting an overcurrent of an electric circuit from the movable contact stand to the load-side terminal and causing the closing / closing mechanism to perform a tripping operation. The magnetic flux holding means extending along the direction of separation of the repulsion portion is provided by the fixing means. A circuit breaker, which is provided integrally with the circuit breaker.
PCT/JP1990/000835 1989-06-30 1990-06-27 Circuit breaker WO1991000609A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP90909849A EP0482197B1 (en) 1989-06-30 1990-06-27 Circuit breaker
DE69030666T DE69030666T2 (en) 1989-06-30 1990-06-27 OFF SWITCH

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP16664089A JP2633959B2 (en) 1989-06-30 1989-06-30 Circuit breaker
JP1/166640 1989-06-30
JP1/318752 1989-12-11
JP1318752A JP2711002B2 (en) 1989-12-11 1989-12-11 Circuit breaker
JP2/67009 1990-03-19
JP2067009A JP2714216B2 (en) 1990-03-19 1990-03-19 Circuit breaker

Publications (1)

Publication Number Publication Date
WO1991000609A1 true WO1991000609A1 (en) 1991-01-10

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Country Link
EP (1) EP0482197B1 (en)
DE (1) DE69030666T2 (en)
WO (1) WO1991000609A1 (en)

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JP2894052B2 (en) * 1990-12-11 1999-05-24 株式会社日立製作所 Circuit breaker
JP4321296B2 (en) * 2004-02-19 2009-08-26 富士電機機器制御株式会社 Repulsive circuit breaker contactor device
ITMI20072204A1 (en) * 2007-11-21 2009-05-22 Abb Spa DOUBLE INTERRUPTION UNI-POLAR OR MULTI-POLAR INTERRUPTION DEVICE
CN109216125B (en) * 2017-07-06 2023-07-25 王静洋 High breaking arcless circuit breaker

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Also Published As

Publication number Publication date
EP0482197A4 (en) 1992-11-25
DE69030666T2 (en) 1997-10-16
EP0482197A1 (en) 1992-04-29
EP0482197B1 (en) 1997-05-07
DE69030666D1 (en) 1997-06-12

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