WO2015004697A1 - 回路遮断器 - Google Patents
回路遮断器 Download PDFInfo
- Publication number
- WO2015004697A1 WO2015004697A1 PCT/JP2013/004288 JP2013004288W WO2015004697A1 WO 2015004697 A1 WO2015004697 A1 WO 2015004697A1 JP 2013004288 W JP2013004288 W JP 2013004288W WO 2015004697 A1 WO2015004697 A1 WO 2015004697A1
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- movable
- free end
- movable piece
- fixed
- yoke
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
- H01H71/443—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay with dash-pot
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2472—Electromagnetic mechanisms with rotatable armatures
Definitions
- This invention relates to a circuit breaker equipped with an electromagnetic trip device using an oil dashpot, and more particularly to an improvement in driving force for the electromagnetic trip device to trip an opening / closing mechanism.
- An electromagnetic device constituting an electromagnetic trip device of a conventional circuit breaker has an oil dashpot type fixed iron core fixed to one leg portion of an L-shaped yoke made of a magnetic plate and the other leg portion.
- the movable iron piece is rotatably supported so as to face the contact surface of the fixed iron core, and the movable iron piece is held by inserting a column on the yoke side into a window hole or a notch groove of the movable iron piece.
- a spring for biasing the movable iron piece is provided so as to enlarge the gap between the movable iron piece and the contact surface of the fixed iron core.
- one end of the iron core provided in the oil dash pot of the fixed iron core is coupled to one leg portion of the L-shaped yoke to form a magnetic circuit, and the attraction force that makes this magnetic circuit a closed circuit is utilized.
- the movable iron piece is rotated to open the opening / closing mechanism.
- the present invention has been made to solve the above-described problems, and improves the driving force in an electromagnetic trip device for tripping an opening / closing mechanism without increasing the size of the electromagnetic trip device.
- the circuit breaker which can do is obtained.
- a circuit breaker includes a movable contact, a fixed contact that contacts and separates from the movable contact, an opening / closing mechanism that opens and closes the movable contact, and an opening / closing mechanism that is connected to the movable contact.
- An electromagnetic tripping device, and the electromagnetic tripping device includes a yoke made of a magnetic plate, a fixed iron core fixed to one leg of the yoke, and wound around the fixed iron core.
- a circuit breaker comprising a movable piece spring held by the fixed end holding portion of the yoke located away from the free end and held by the movable iron piece, when the movable iron piece is not attracted to the fixed iron core, The free end of the movable iron spring rotates the movable iron It is in the first position on the yoke side with respect to the line connecting the core and the fixed end of the movable piece spring.
- the free end of the movable piece spring is movable from the first position. It is made to be in the 2nd position beyond the line which connects the axis of rotation of an iron piece, and the fixed end of a movable piece spring.
- the urging force of the movable piece spring is added to the attractive force by the magnetic force, so that it is possible to secure a driving force for detaching the opening / closing mechanism, and to It is possible to reduce the size of the circuit breaker by reducing the size of the removing device.
- FIG. 2 It is a longitudinal cross-sectional view which shows the whole structure of the circuit breaker in Embodiment 1 of this invention. It is an enlarged side view which shows the electromagnetic tripping apparatus in Embodiment 1 of this invention. It is an enlarged view which shows the yoke of the electromagnetic tripping device shown in FIG. 2, (a) is a side enlarged view, (b) is a front enlarged view. It is an enlarged view which shows the movable piece of the electromagnetic tripping device shown in FIG. 2, (a) is a plane enlarged view, (b) is a side enlarged view.
- FIG. 1 is a longitudinal sectional view showing the overall configuration of a circuit breaker according to Embodiment 1 of the present invention
- FIG. 2 is an enlarged side view showing an electromagnetic trip device
- FIG. 3 is an illustration of the electromagnetic trip device shown in FIG.
- FIG. 4 is an enlarged view showing a yoke
- (a) is an enlarged side view
- (b) is an enlarged front view
- FIG. 4 is an enlarged view showing a movable piece of the electromagnetic tripping device shown in FIG. 2
- (a) is an enlarged plan view.
- FIG. 5B is an enlarged side view
- FIG. 5B is an enlarged side view
- FIG. 5 is an explanatory view for explaining the action of the movable piece spring in the state where the movable piece is not attracted in the electromagnetic tripping device shown in FIG. 2
- FIG. FIG. 7 is an explanatory diagram for explaining the magnetic flux in a state where the movable piece is not attracted in the electromagnetic trip device shown in FIG. 7, and FIG. 7 is a diagram for explaining the magnetic flux in the state where the movable piece is attracted in the electromagnetic trip device shown in FIG.
- FIG. 8 is an explanatory diagram for the purpose of carrying out the operation, and FIG. 8 shows the electromagnetic tripping device shown in FIG. It is an explanatory view for explaining the operation of the movable piece spring state.
- a circuit breaker 101 is configured using a housing 10 that includes a base 11 and a cover 12 formed of an insulating material.
- circuit breaker units for example, three in the case of three phases
- a well-known delay entry mechanism is disposed above the central circuit breaker unit.
- An opening / closing mechanism 30 having the above is disposed.
- the cover 12 covers the circuit breaker unit of each phase on the base 11 and the opening / closing mechanism 30, and the operation handle 31 of the opening / closing mechanism 30 protrudes from the window hole 12 a of the cover 12.
- the circuit breaker units for each phase are configured in the same manner, and the crossbar 13 is arranged on the base 11 so as to be orthogonal to the circuit breaker units for each phase in common with the circuit breaker units for each phase.
- Each circuit breaker unit for each phase includes a power supply side terminal 20 that is a first external terminal provided on the base 11, a fixed contact 21 that extends from the power supply side terminal 20 and has a fixed contact 22, and a fixed contact.
- a movable contact 23 that contacts and separates from the contact 22, a movable contact 24 that has the movable contact 23 at one end and is freely held in the vertical direction by the crossbar 13, and a flexible copper stranded wire to the movable contact 24.
- an electromagnetic trip device 40 that trips the opening / closing mechanism 30, and a load-side terminal 26 that is connected to the electromagnetic trip device 40 and is a second external terminal provided on the base 11. And have.
- the fixed contact 22 and the movable contact 23 constitute an open / close contact that opens and closes the electric circuit.
- An arc extinguishing device 27 having an arc extinguishing plate 27 a is provided in the vicinity of the fixed contact 22 and the movable contact 23. If the movable contact 23 comes into contact with the fixed contact 22, the electrical circuit between the terminals 20 and 26 is turned on. If the movable contact 23 is separated from the fixed contact 22, the electrical circuit between the terminals 20 and 26. Is turned off.
- the cross bar 13 is moved up and down by the opening / closing mechanism 30.
- the movable contacts 24 of the circuit breaker units of the poles move up and down at the same time.
- the movable contactor 24 moves up and down, the movable contact 23 contacts and separates from the fixed contact 22.
- the opening / closing mechanism 30 includes a known trip bar 33 that is driven by an electromagnetic tripping device 40 for each pole.
- the electromagnetic trip device 40 includes a coil 41 connected to the movable contact 24 and the load-side terminal 26 and wound to convert an energization current into a magnetic flux, and an electromagnetic plate 41.
- the L-shaped yoke 42 through which the magnetic flux passes through and the time at which the iron core is adsorbed to the pipe lid by the viscosity of the oil are controlled by using the magnetic flux of the coil 41 fixed to one leg portion of the yoke 42, and the time limit is reached.
- an oil dash pot 43 for determining the characteristics.
- the oil dash pot 43 includes a pipe 44 around which the coil 41 is wound, a pipe lid 45 serving as a lid for the pipe 44, an iron core 47 provided with oil 46 in the pipe 44, and the iron core 47
- An iron core spring 48 is provided between the pipe lids 45 and biases the iron core 47 in a direction away from the pipe lid 45.
- the “fixed iron core” described in the claims is the oil dash pot 43 described above.
- the electromagnetic tripping device 40 opposes the pipe lid 45 and is movable freely held by a holding portion 42a provided on the other leg portion of the yoke 42, and a bent portion 42b of the yoke 42.
- a movable piece spring 50 which is provided between the end portions 49e of the movable piece 49 and biases the movable piece 49.
- the bent portion 42b of the yoke 42 is provided by bending a part of the yoke from the vicinity of the holding portion 42a.
- the movable piece 49 has a suction surface 49 a that is attracted to the pipe lid 45, a fulcrum 49 b that is the rotational axis of the movable piece 49, and a penetration for passing the extension 42 c of the yoke 42.
- the movable piece spring 50 which is a compression spring, is provided between the fixed end holding portion 42b1 and the free end holding portion 49e1 provided at the tip of the bent portion 42b of the yoke 42.
- the fixed end holding portion 42b1 side is the fixed end 50a of the movable piece spring 50
- the free end holding portion 49e1 side is the free end 50b of the movable piece spring 50.
- the movable piece spring 50 is a compression spring, and the distance between the fixed end holding portion 42b1 and the free end holding portion 49e1 is shorter than the distance between the free end holding portion 49e1 and the fulcrum 49b.
- the fixed end holding portion 42b1 is provided closer to the free end 50b than the fulcrum 49b.
- a free end holding portion 49e1 that holds the free end 50b of the movable piece spring 50 is located on the yoke 42 side (on the right side in FIG. 5) from the line A connecting with 42c.
- the “first position” described in the claims is a position where the free end 50 b of the movable piece spring 50 is closer to the yoke 42 than the line A.
- the movable piece spring 50 Since the distance to the free end holding portion 49e1 does not change, the movable piece spring 50 is released from the most compressed state and starts to expand, and the length L1 of the movable piece spring 50 is increased at the free end 50b.
- the urging force F2 in the direction works.
- the urging force F2 generates a clockwise moment M2 around the fulcrum 49b, and the movable piece 49 further rotates clockwise by this force moment M2, and the end 49e trips.
- the cross bar 13 of the opening / closing mechanism 30 is driven, and the movable contact 24 is separated from the fixed contact 21.
- the movable contact 23 is separated from the fixed contact 22 by the movement of the movable contact 24.
- the movable contact 23 is released, the arc generated by the flowing current is extinguished by the arc extinguishing device 27 and the interruption is completed.
- the end portion 49e of the movable piece 49 contacts the trip bar 33 after the free end 50b rotates from the first position to the second position beyond the line A. That is, the tripping of the opening / closing mechanism 30 by the electromagnetic tripping device 40 is performed after the free end 50b exceeds the line A. As a result, the moment M2 of the force acting on the movable piece 49 is added to the attraction force by the magnetic flux B, so that a driving force sufficiently exceeding the tripping load of the opening / closing mechanism 30 is exhibited. Since the on / off operation is the same as that of a known circuit breaker, a description thereof will be omitted.
- the “second position” described in the claims means the side opposite to the yoke 42 in which the free end 50b of the movable piece spring 50 has moved beyond the line A from the first position, that is, with respect to the line A. It is a position opposite to the first position.
- the movable piece spring 50 is a compression spring
- the fixed end holding portion 42b1 is provided near the free end 50b from the fulcrum 49b
- the movable iron piece 49 is adsorbed to the old dash pot 43.
- the free end 50b of the movable piece spring 50 is on the side of the yoke 42 with respect to the line A, and the free end 50b exceeds the line A from the side of the yoke 42 when the movable iron piece 49 is attracted to the ordash pot 43.
- the oil dash pot 43 attracts the movable piece 49 because it is on the side opposite to the yoke 42, the urging force of the movable piece spring 50 is added to the attractive force by the magnetic force, and the driving force that the movable piece 49 pushes the trip bar 33 increases. Therefore, the number of turns of the coil 41 can be reduced and the electromagnetic trip device 40 can be downsized, and the circuit breaker can be downsized.
- the biasing force of the movable piece spring 50 is added to the attracting force by the magnetic force, so that the AC and DC electromagnetic trip devices 40 are shared. It is also possible.
- the fixed contact 22 is provided with the fixed contact 22 and the movable contact 24 is provided with the movable contact 23.
- the fixed contact 22 and the movable contact 23 are not provided, and the fixed contact 22 is provided. 21 and the movable contact 24 may directly contact and separate.
- FIG. FIG. 9 is an explanatory view for explaining the action of the movable piece spring in a state where the movable piece is not attracted in the electromagnetic trip device according to the second embodiment of the present invention
- FIG. 10 is an electromagnetic trip shown in FIG. It is explanatory drawing for demonstrating an effect
- the movable piece spring 50 of the electromagnetic trip device 40 is configured by a compression spring, but in the electromagnetic trip device 60 of the present embodiment, the movable piece spring 51 is configured by a tension spring. Is.
- an electromagnetic trip device 60 is connected to the movable contact 24 and the load-side terminal 26, and is wound with a coil 61 wound to convert an energized current into a magnetic flux, and an electromagnetic plate.
- L-shaped yoke 62 to be passed through, and the time limit characteristic is determined by controlling the time that the iron core is adsorbed to the pipe lid by the viscosity of oil using the magnetic flux of the coil 61 fixed to one leg of the yoke 62
- an oil dash pot 63 includes a pipe 64 around which the coil 61 is wound, a pipe lid 65 that serves as a lid for the pipe 64, an iron core 67 provided with the oil 66 in the pipe 64, and the iron core 67.
- An iron core spring 68 is provided between the pipe lids 65 and biases the iron core 67 away from the pipe lid 65.
- the electromagnetic trip device 60 is provided on the yoke 62 and a movable piece 69 that faces the pipe lid 65 and is held freely by a holding portion 62 a provided on the other leg portion of the yoke 62.
- a movable piece spring 51 that is stretched between the fixed end holding portion 62 b and the end portion 69 e of the movable piece 69 and biases the movable piece 69 is provided.
- the yoke 62 is provided with a holding portion 62a for holding the movable piece 69, and a fixed end holding portion 62b that is provided on the upper portion of the holding portion 62a and holds the fixed end of the movable piece spring 51.
- the movable piece 69 is provided at an adsorption surface 69 a that is attracted to the pipe lid 65, a fulcrum 69 b that is the rotation center of the movable piece 69, and an end portion 69 e of the movable piece 69, and holds the movable piece spring 51.
- the movable piece spring 51 which is a tension spring, is stretched between the fixed end holding portion 62b and the free end holding portion 69e1 of the yoke 62, and the fixed end holding portion 62b side is the fixed end 51a of the movable piece spring 51.
- the portion 69e1 side is the free end 51b of the movable piece spring 51.
- the distance between the fixed end holding portion 62b and the free end holding portion 69e1 is configured to be longer than the distance between the free end holding portion 69e1 and the fulcrum 69b. Since other configurations are the same as those in the first embodiment, description thereof is omitted.
- the urging force F3 of the movable piece spring 51 generates a counterclockwise force moment M3 about the fulcrum 69b.
- the attracting surface 69a of the movable piece 69 is urged away from the pipe lid 65, which is the contact surface, that is, in the direction of arrow D, and rotated until the end 69e contacts the yoke 62.
- the “first position” described in the claims is a position where the free end 51 b of the movable piece spring 51 is closer to the yoke 62 than the line C.
- the iron core 67 is attracted toward the pipe lid 65 after a predetermined time due to the viscous resistance of the oil 66, and the first magnetic gap G3 is changed from the normal L4 shown in FIG. It decreases to L5 shown in FIG. Since the iron core 67 is attracted to the pipe lid 65 and the first magnetic gap G3 is reduced, the magnetic flux B of the second magnetic gap G4 between the movable piece 69 and the pipe lid 65 gradually increases.
- the “second position” described in the claims means the side opposite to the yoke 62 where the free end 51b of the movable piece spring 51 has moved beyond the line C from the first position, that is, the line C. It is a position opposite to the first position.
- the urging force F4 of the movable piece spring 51 generates a moment M4 of the clockwise force around the fulcrum 69b. Due to the moment M4 of the force, the suction surface 69a of the movable piece 69 is urged in the direction approaching the pipe lid 65 that is the contact surface, that is, in the direction of arrow E, and rotates clockwise. By this rotation, the end 69e pushes the trip bar 33, and the cross bar 13 of the opening / closing mechanism 30 is driven to separate the movable contact 24 from the fixed contact 21. The movable contact 23 is separated from the fixed contact 22 by the movement of the movable contact 24. When the movable contact 23 is released, the arc generated by the flowing current is extinguished by the arc extinguishing device 27 and the interruption is completed.
- the end 69e of the movable piece 69 contacts the trip bar 33 after the free end 51b rotates from the first position to the second position beyond the line C. That is, the tripping of the opening / closing mechanism 30 by the electromagnetic tripping device 60 is performed after the free end 51b exceeds the line C. As a result, the moment M4 of the force acting on the movable piece 69 is added to the attraction force by the magnetic flux, thereby exhibiting a driving force sufficiently exceeding the tripping load of the opening / closing mechanism 30.
- the movable piece spring 51 is a tension spring
- the fulcrum 69b is provided closer to the free end 51b than the fixed end holding portion 62b
- the movable iron piece 69 is attracted to the old dash pot 63.
- the free end 51b of the movable piece spring 51 is on the yoke 62 side with respect to the line C, and when the movable iron piece 69 is attracted to the ordash pot 63, the free end 51b exceeds the line C from the yoke 62 side.
- the oil dash pot 63 attracts the movable piece 69
- the urging force of the movable piece spring 51 is added to the attractive force by the magnetic force, and the driving force that the movable piece 69 pushes the trip bar 33 is generated. Therefore, the number of turns of the coil 61 can be reduced and the electromagnetic tripping device 60 can be downsized, and the circuit breaker can be downsized.
- the oil dash pot 63 attracts the movable piece 69
- the biasing force of the movable piece spring 51 is added to the attracting force by the magnetic force, so that the AC and DC electromagnetic trip devices 60 can be shared. Is also possible.
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Abstract
Description
図1は本発明の実施の形態1における回路遮断器の全体構成を示す縦断面図、図2は電磁形引き外し装置を示す拡大側面図、図3は図2に示す電磁形引き外し装置のヨークを示す拡大図で、(a)は側面拡大図、(b)は正面拡大図、図4は図2に示す電磁形引き外し装置の可動片を示す拡大図で、(a)は平面拡大図、(b)は側面拡大図、図5は図2に示す電磁形引き外し装置において可動片が吸引されていない状態の可動片ばねの作用を説明するための説明図、図6は図2に示す電磁形引き外し装置において可動片が吸引されていない状態の磁束を説明するための説明図、図7は図2に示す電磁形引き外し装置において可動片が吸引された状態の磁束を説明するための説明図、図8は図2に示す電磁形引き外し装置において可動片が吸引された状態の可動片ばねの作用を説明するための説明図である。
また、各相の回路遮断ユニットは、互いに同じに構成され、クロスバー13は、各相の回路遮断ユニットに共通して、各相の回路遮断ユニットに直交するように、ベース11上に配置される。
図3に示すように、ヨーク42の折り曲げ部42bは、保持部42aの近傍からヨークの一部を折り曲げられ設けられている。
電路に定格電流以下の電流が流れている状態では、図5に示すように、可動片49の回転中心である支点49bと、可動片バネ50の固定端50aが保持されている固定端保持部42cとを結ぶ線Aより、可動片バネ50の自由端50bが保持されている自由端保持部49e1がヨーク42側(図5紙面上の右側)にある。
電路に電流が流れるとコイル41に励磁電流が流れ、この励磁電流により発生する磁束は、図6に示すように、ヨーク42→鉄心47→鉄心47とパイプ蓋45間の第1の磁気ギャップG1→パイプ蓋45→可動片49とパイプ蓋45間の第2の磁気ギャップG2→可動片49→ヨーク42からなる磁気回路を通過する。このとき、電路に所定値以上の過電流が流れると、この過電流により作られる磁束は、鉄心47をパイプ蓋45の方向に吸引する吸引力を発生させ、この吸引力は鉄心バネ48の付勢力を超えることとなる。そうすると鉄心47は、図7に示すように、オイル46の粘性抵抗により所定の時間を経てパイプ蓋45側へ吸引され、第1の磁気ギャップG1は図6に示す通常時のL2から図7に示すL3に減少する。鉄心47がパイプ蓋45に吸着され第1の磁気ギャップG1が減少することで可動片49とパイプ蓋45間の第2の磁気ギャップG2の磁束Bはしだいに大きくなる。
オン、オフ動作については、周知の回路遮断器と同様であるので、説明は省略する。
なお、請求の範囲で述べている「第2の位置」とは、可動片バネ50の自由端50bが第1の位置から線Aを超えて移動した反ヨーク42側、すなわち、線Aに対し第1の位置の反対側の位置のことである。
図9は本発明の実施の形態2における電磁形引き外し装置において可動片が吸引されていない状態の可動片バネの作用を説明するための説明図、図10は図9に示す電磁形引き外し装置において可動片が吸引された状態の可動片バネの作用を説明するための説明図である。実施の形態1では、電磁形引き外し装置40の可動片バネ50を圧縮バネで構成していたが、本実施の形態の電磁形引き外し装置60では、可動片バネ51を引張りバネで構成したものである。
その他の構成については、実施の形態1と同様であるので、説明を省略する。
以上のような構成により、定格電流以下の電流が流れている状態では、図9に示すように、可動片69の回転中心である支点69bと、可動片バネ51の固定端51aが保持されている固定端保持部62bとを結ぶ線Cより、可動片バネ51の自由端51bおよび自由端51bを保持している自由端保持部69e1が、ヨーク62側(図9紙面上の右側)にある。
実施の形態1と同様に、電路に電流が流れるとコイル61に励磁電流が流れ、この励磁電流により発生する磁束は、ヨーク62→鉄心67→鉄心67とパイプ蓋65間の第1の磁気ギャップG3→パイプ蓋65→可動片69とパイプ蓋65間の第2の磁気ギャップG4→可動片69→ヨーク62からなる磁気回路を通過する。このとき、電路に所定値以上の過電流が流れると、この過電流により作られる磁束は、鉄心67をパイプ蓋65に吸引する吸引力を発生させ、この吸引力は鉄心バネ68の付勢力を超えることとなる。
なお、請求の範囲で述べている「第2の位置」とは、可動片バネ51の自由端51bが第1の位置から線Cを超えて移動した反ヨーク62側、すなわち、線Cに対し第1の位置の反対側の位置のことである。
これにより、可動片69に働く力のモーメントM4が磁束による吸引力にプラスされることで、開閉機構部30の引き外し荷重を十分に上回る駆動力を発揮するものである。
20 電源側端子、21 固定接触子、22 固定接点、23 可動接点、
24 可動接触子、26 負荷側端子、30 開閉機構部、
40 電磁形引き外し装置、41 コイル、
42 ヨーク、42b 折り曲げ部、42b1 固定端保持部、
43 オイルダッシュポット、
49 可動片、49e 端部、49e1 自由端保持部、
50 可動片バネ、50a 固定端、50b 自由端、
101 回路遮断器。
Claims (4)
- 可動接触子と、前記可動接触子に接触および開離する固定接触子と、前記可動接触子を開閉させる開閉機構部と、前記可動接触子に接続され、前記開閉機構部を引き外す電磁形引き外し装置と、を備え、
前記電磁形引き外し装置は、磁性板からなるヨークと、このヨークの一方の脚部に固着される固定鉄心と、この固定鉄心に巻回され、前記両接触子と直列に接続されたコイルと、前記ヨークの他方の脚部の保持部に回動自由に保持され、前記固定鉄心の接極面に対向する吸着面を有する可動鉄片と、固定端が前記保持部から離れた位置にある前記ヨークの固定端保持部に保持され、自由端が前記可動鉄片に設けられた自由端保持部に保持された可動片バネと、を備えた回路遮断器において、
前記可動鉄片が前記固定鉄心に吸着されていないとき、前記自由端は、前記可動鉄片の回動軸心と前記固定端とを結ぶ線に対し、前記ヨーク側の第1の位置にあり、前記可動鉄片が前記固定鉄心に吸着されたとき、前記自由端は、前記第1の位置から前記線を越えた第2の位置にあることを特徴とする回路遮断器。 - 前記可動片バネは圧縮バネであり、前記固定端保持部と前記自由端保持部との距離は、前記自由端保持部と前記回動軸心との距離より短いことを特徴とする請求項1に記載の回路遮断器。
- 前記可動片バネは引張りバネであり、前記固定端保持部と前記自由端保持部との距離は、前記自由端保持部と前記回動軸心との距離より長いことを特徴とする請求項1に記載の回路遮断器。
- 前記電磁形引き外し装置による前記開閉機構部の引き外しは、前記自由端が、前記線を越えてから行われることを特徴とする請求項1ないし請求項3のいずれか1項に記載の回路遮断器。
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CN201380078111.8A CN105378887B (zh) | 2013-07-11 | 2013-07-11 | 电路断路器 |
KR1020157035222A KR101773281B1 (ko) | 2013-07-11 | 2013-07-11 | 회로 차단기 |
JP2013541897A JP5435183B1 (ja) | 2013-07-11 | 2013-07-11 | 回路遮断器 |
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JPH04711U (ja) * | 1990-04-11 | 1992-01-07 | ||
JP2002251949A (ja) * | 2001-02-26 | 2002-09-06 | Kawamura Electric Inc | 回路遮断器 |
JP2006302634A (ja) * | 2005-04-20 | 2006-11-02 | Fuji Electric Fa Components & Systems Co Ltd | 回路遮断器の電磁引外し装置 |
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JPH07282711A (ja) * | 1994-04-08 | 1995-10-27 | Kawamura Denki Sangyo Kk | 回路遮断器 |
JP3117074B2 (ja) * | 1996-08-06 | 2000-12-11 | 富士電機株式会社 | 回路遮断器 |
JP3985179B2 (ja) | 2000-04-17 | 2007-10-03 | 富士電機機器制御株式会社 | 回路遮断器の電磁引外し装置 |
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JPH04711U (ja) * | 1990-04-11 | 1992-01-07 | ||
JP2002251949A (ja) * | 2001-02-26 | 2002-09-06 | Kawamura Electric Inc | 回路遮断器 |
JP2006302634A (ja) * | 2005-04-20 | 2006-11-02 | Fuji Electric Fa Components & Systems Co Ltd | 回路遮断器の電磁引外し装置 |
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