WO2019181532A1 - 引き外し装置 - Google Patents

引き外し装置 Download PDF

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Publication number
WO2019181532A1
WO2019181532A1 PCT/JP2019/009060 JP2019009060W WO2019181532A1 WO 2019181532 A1 WO2019181532 A1 WO 2019181532A1 JP 2019009060 W JP2019009060 W JP 2019009060W WO 2019181532 A1 WO2019181532 A1 WO 2019181532A1
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WO
WIPO (PCT)
Prior art keywords
iron core
conductor
tripping device
movable iron
tripping
Prior art date
Application number
PCT/JP2019/009060
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English (en)
French (fr)
Japanese (ja)
Inventor
孝幸 甲斐
俊彦 竹松
Original Assignee
三菱電機株式会社
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
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2019564547A priority Critical patent/JP6704542B2/ja
Priority to CN201980020271.4A priority patent/CN111886668B/zh
Publication of WO2019181532A1 publication Critical patent/WO2019181532A1/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release

Definitions

  • the present invention relates to a circuit breaker trip device, in particular, in a circuit network having a main circuit breaker connected to the power supply side and a plurality of branch circuit breakers connected to the load side thereof. Only the circuit breaker operates, and the other healthy circuit relates to a circuit breaker tripping device used in a selective breaker system that continues to supply power.
  • the conventional circuit breaker tripping device detects this overcurrent and executes a tripping operation when an overcurrent occurs in the circuit path of the circuit breaker.
  • the tripping device operates the latch mechanism by this tripping operation and opens the contact of the opening / closing mechanism.
  • the tripping device includes two types of tripping mechanisms that perform a tripping operation.
  • One is a bimetal trip mechanism (hereinafter referred to as a bimetal mechanism).
  • the bimetal mechanism uses the property that two types of metal are bonded together and bends at high temperatures due to the difference in thermal expansion of these metals, and the bimetal is bent by the heat generated by the resistor incorporated in the electrical circuit. Operate the mechanism.
  • the other is a tripping mechanism (hereinafter referred to as a magnetic circuit mechanism section) using a magnetic circuit.
  • the magnetic circuit mechanism part forms a magnetic circuit by arranging a movable iron core and a fixed iron core so as to surround the electric circuit, and the movable iron core is arranged at an initial position by an elastic force of a return spring so as to form a gap with the fixed iron core. .
  • the movable core is attracted to the fixed core side and operates (for example, Patent Document 1). ).
  • the overcurrent that leads the tripping device to the tripping operation is determined by the rated current of the circuit breaker. Furthermore, the time until the tripping operation needs to be changed according to the magnitude of the accident current. If the overcurrent is relatively close to the rated current, the trip device may be temporarily overloaded, so it will not operate immediately, and a time range (several seconds to (Several tens of minutes) is required to perform the tripping operation. A tripping operation (referred to as a long time operation) is performed after a relatively long time from the occurrence of such an overcurrent.
  • the trip device has a relatively short time range (several milliseconds to several seconds after the overcurrent occurs). )
  • a tripping operation (referred to as a short-time operation) is executed after a relatively short time from the occurrence of such an overcurrent.
  • the long-time operation is set so that the bimetal mechanism is utilized, while the short-time operation is set so that the magnetic circuit mechanism is utilized.
  • a protection target circuit 1000c to which the circuit breaker tripping device according to the prior art is applied is configured as shown in FIG.
  • a main circuit breaker 100c having a relatively large capacity is connected to the power supply side, and a plurality of branch circuit breakers 101, branch circuit breakers 102, and branch circuit breakers are connected to the load side of the main circuit breaker 100c.
  • the devices 103 are connected in parallel.
  • the trip device of the main circuit breaker 100c is activated to interrupt the accident current (referred to as a trip operation).
  • power supply to the branch circuit breakers 101 to 103 on the load side of the main circuit breaker 100c is also stopped.
  • the operation characteristic of the main circuit breaker 100c is the operation characteristic curve Md
  • the operation characteristics of the branch circuit breakers 101 to 103 are the operation characteristic curve Mc. If there is, the characteristics of the main circuit breaker 100 and the branch circuit breakers 101 to 103 do not intersect with each other, so that selective interruption is possible in the entire region of overcurrent.
  • the trip operation of these circuit breakers 100 to 103 is performed by a built-in trip device. To realize the above-described characteristics, the trip circuit of the main circuit breaker 100c is connected to the branch circuit breakers 101 to 103. The tripping operation only needs to be performed while the overcurrent is interrupted by 103.
  • the present invention has been made to solve these problems, and an object of the present invention is to provide a circuit breaker tripping device that can be easily set with a wide setting range of the operation time of the circuit breaker. It is to be.
  • the tripping device of the present invention constitutes a magnetic circuit mechanism portion by a conductor that conducts current and a movable iron core that is made of a magnetic material and is displaceably arranged. Further, when a current exceeding a preset value flows in the conductor, the magnetic circuit mechanism section increases the displacement speed of the movable iron core by the magnetic attraction force, then decreases the displacement speed, and further trips to interrupt the current. Perform the action.
  • a tripping device for a circuit breaker that can be selectively cut off in a wide current range is provided, and a reliable power distribution system can be provided by this tripping device.
  • FIG. 1 is a structural diagram of a main circuit breaker 100 to which a tripping device 7 according to Embodiment 1 of the present invention is applied.
  • 1 is a perspective view of a tripping device 7 according to Embodiment 1 of the present invention.
  • FIG. 3 is an exploded perspective view of the trip device 7. It is a two-view figure of the movable iron core 74 of the tripping device 7. It is a side view of the tripping device in a non-operating state.
  • FIG. 7 is a side view of a tripping operation state of a bimetal mechanism portion 7b of the tripping device 7.
  • FIG. 7 is a side view of a tripping operation state of a magnetic circuit mechanism portion 7ma of the tripping device 7.
  • FIG. It is a graph which shows the operating characteristic of the circuit breaker to which the tripping device 7 is applied. It is a graph which shows the time change of each parameter when the magnetic circuit mechanism part 7ma of the tripping device 7 performs the tripping operation.
  • the operating state of the movable iron core 74 when the tripping device 7 is angularly displaced around the rotation shaft 76 is shown.
  • a modification of the movable iron core 74 of the tripping device 7 is shown.
  • FIG. 6 is a perspective view of the trip device 8. It is a graph which shows the time change of each parameter when the magnetic circuit mechanism part 8mc of the tripping device 8 performs a tripping operation. The operating state of the movable iron core 84 of the tripping device 8 is shown.
  • FIG. 1 It is a connection diagram of a protection target circuit 1000c to which a circuit breaker to which a conventional trip device is applied is connected. It is a graph which shows the operating characteristic of the circuit breaker to which the conventional tripping device is applied. It is a perspective view of the tripping device 9 according to Embodiment 4 of the present invention. It is explanatory drawing of the magnetic flux M1 in the cross-sectional position D1 of the tripping device 9. FIG. It is explanatory drawing of the magnetic flux M2 in the cross-sectional position D2 of the tripping device 9. FIG.
  • FIG. 1 is a connection diagram showing a protection target circuit 1000 to which a circuit breaker to which the tripping device 7 is applied is connected
  • FIG. 2 is a structural diagram of a main circuit breaker 100 to which the tripping device 7 is applied. .
  • a protection target circuit 1000 to which the tripping device 7 according to the first embodiment is applied will be described with reference to FIG.
  • a main circuit breaker 100 having a relatively large capacity is connected to the power source side (terminal 100UT side), and a plurality of branch circuit breakers 101, branch circuit breakers 102, and branches are connected to the load side of the main circuit breaker 100.
  • a circuit breaker 103 is connected in parallel.
  • the trip device 7 is applied to the main circuit breaker 100, and the conventional trip device is applied to the branch circuit breakers 101 to 103.
  • the branch circuit breaker 101 is connected to a terminal 101DT, and the terminal 101DT is connected to a load (not shown).
  • the branch circuit breaker 102 is connected to another load (not shown) via a terminal 102DT
  • the branch circuit breaker 103 is connected to another load (not shown) via a terminal 103DT.
  • circuit breakers (100 to 103) are provided to protect the load and wiring from overcurrent and short circuit current, and when the overcurrent flows, the trip device incorporated in the circuit breaker (100 to 103) Activates and trips. The overcurrent is cut off to protect the load and wiring.
  • the case 1 made of an insulating resin has a movable contact 3, a fixed contact 4, an arc extinguishing plate 5, a latch mechanism 6, a tripping device 7, a first conductor 11, a second conductor 12, The first terminal block 13, the second terminal block 14, and the connection conductor 17 are incorporated. Further, the upper part of the case 1 is covered with a cover 2 made of an insulating resin or the like.
  • the movable contact 3 is configured to be rotatable around a rotation shaft 32, and includes a movable contact 31 formed at one end of the movable contact 3 and a fixed contact 41 formed on the surface of the fixed contact 4.
  • a pair of contacts is configured.
  • the latch mechanism 6 includes a mechanism for switching between the movable contact 31 and the fixed contact 41 from the closed state to the open state by the rotation of the movable contact 3.
  • FIG. 2 shows the open state, and the arrow e indicates the direction in which the closed state is switched to the open state. Further, the latch mechanism 6 performs an operation (trip operation) for switching from the closed state to the open state by a trip operation of the trip device 7 described later.
  • connection conductor 17 is electrically connected to the first conductor 11, and the first conductor 11 is connected to one end of a tripping device 7 described later, and the other end of the tripping device 7 is connected to the first terminal block 13. Is electrically connected. That is, the movable contact 31 of the movable contact 3 is electrically connected to the first terminal block 13 via the trip device 7.
  • the stationary contact 4 is electrically connected to the second conductor 12.
  • the second conductor 12 is electrically connected to the second terminal block 14. That is, the fixed contact 41 of the fixed contact 4 is electrically connected to the second terminal block 14.
  • the main circuit breaker 100 is used with an external power source connected to the first terminal block 13 and branch circuit breakers 101 to 103 connected in parallel to the second terminal block 14.
  • One terminal (not shown) of the wiring connected to the external power supply is connected to the first terminal block 13. This terminal is disposed on the first terminal block 13, and the screw 15 is fastened to the first terminal block 13 to be fixed.
  • one terminal (not shown) of the wiring connected to the branch circuit breakers 101 to 103 is connected to the second terminal block 14. This terminal is disposed on the second terminal block 14, and the screw 16 is fastened and fixed to the second terminal block 14.
  • FIG. 3 is a perspective view of the tripping device 7
  • FIG. 4 is an exploded perspective view of the tripping device 7.
  • FIG. 5 is a two-side view of the movable iron core 74 of the tripping device 7.
  • the end of the first conductor 71 and the end of the second conductor 72 are electrically connected. Furthermore, the other end 71 e of the first conductor 71 is connected to the first conductor 11. Similarly, the other end 72 e of the second conductor 72 is connected to the first terminal block 13.
  • the movable contact 31 of the movable contact 3 is electrically connected to the first terminal block 13 via the first conductor 71 and the second conductor 72.
  • the rotating shaft 76 is passed between the two holes 74 h of the movable iron core 74. Further, the rotation shaft 76 is fixed to the notch 75 n of the fixed iron core 75, and the movable iron core 74 is disposed so as to be rotatable about the rotation shaft 76. In other words, the movable iron core 74 is disposed so as to be displaceable in a direction in which one end of the suction leg 74 p crosses the first conductor 71 during the tripping operation. Further, a return spring (not shown) is attached to the rotary shaft 76 at the shaft portion of the rotary shaft 76.
  • the suction leg 74p of the movable iron core 74 is disposed so as to maintain the gap g with the fixed iron core 75 by the elastic force of the return spring.
  • one end of the suction leg portion 74p opposite to the rotation support portion 74r is disposed on the side of the first conductor 71.
  • the fixed iron core 75 is disposed on the side of the surface 71r of the first conductor 71.
  • the movable iron core 74 and the fixed iron core 75 are made of a magnetic material, and the fixed iron core 75, the movable iron core 74, and the first conductor 71 constitute a magnetic circuit mechanism portion 7ma.
  • the projecting end surface 74t of the movable iron core 74 is configured to act on the latch mechanism 6.
  • the bimetal 73 obtained by bonding two metal plates having different thermal expansion coefficients is connected to the surface 71 f of one surface of the first conductor 71.
  • the bimetal 73 and the first conductor 71 form a bimetal mechanism 7b.
  • the end 73 t of the bimetal 73 is configured to act on the latch mechanism 6.
  • FIG. 5 is a two-side view of the movable iron core 74 of the tripping device 7, showing a front view on the left side on the paper surface and a side view on the right side on the paper surface.
  • the movable iron core 74 includes a rotation support portion 74r having two hole portions 74h, two suction leg portions 74p, and a movable arm portion 74a having a protrusion 74c.
  • the rotation support portion 74r is bent at the left end portion and the right end portion on the plane of FIG. 5 (front view), and has holes 74h at the two bent side portions.
  • one suction leg 74p is connected to the lower right end of the rotation support 74r on the paper surface of FIG. 5 (front view), and the other suction leg 74p is connected to the rotation support 74r of FIG. 5 (front view). ) Connected to the lower left edge on the page.
  • the movable iron core 74 rotates around the hole 74h, and the suction leg 74p is displaced.
  • the movable arm portion 74a is connected to the upper right end of the rotation support portion 74r on the paper surface of FIG. 5 (front view).
  • the protrusion 74c is connected to the upper left end of the movable arm 74a on the paper surface of FIG. 5 (side view).
  • the projecting end surface 74t is one surface of the left end portion of the projecting portion 74c on the paper surface of FIG. 5 (side view). In other words, the projecting end surface 74t is one surface of the projection 74c on the paper surface of FIG. 5 (front view).
  • FIGS. 6 is a side view of the trip device 7 in a non-operating state
  • FIG. 7 is a side view of the bimetal mechanism portion 7b of the trip device 7
  • FIG. 8 is a magnetic circuit mechanism portion of the trip device 7. It is a side view of a 7ma operation state.
  • FIG. 9 shows the operating characteristics of a circuit breaker to which the trip device 7 is applied.
  • a trip bar 61 and a movable arm 62 which are components of the latch mechanism 6, are disposed at a position facing the protruding end surface 74 t of the tripping device 7.
  • the trip bar 61 is rotatable, and the movable arm 62 is attached on the circumference of the trip bar 61. Further, the suction leg portion 74p of the movable iron core 74 is disposed so as to maintain the gap g with the fixed iron core 75 by the elastic force of the return spring (not shown).
  • the tripping operation by the bimetal mechanism 7b will be described.
  • the heat is transmitted to the bimetal 73, whereby the bimetal 73 is bent, and the end 73t of the bimetal 73 moves in the direction dt.
  • the end portion 73t of the bimetal 73 moves in the direction dt, the end portion 73t pushes the movable arm 62, and the trip bar 61 rotates in the rotation direction rt.
  • the latch mechanism 6 is a mechanism for switching the movable contact 3 and the fixed contact 41 from the closed state to the open state when the trip bar 61 rotates and the movable contact 3 rotates about the rotation shaft 32. Prepare. That is, when the end portion 73t performs a pulling operation for pressing the movable arm 62, the latch mechanism 6 performs a trip operation.
  • the latch mechanism 6 is configured such that when the trip bar 61 rotates, the movable contact 3 rotates about the rotation shaft 32 and the movable contact 31 and the fixed contact 41 are closed. A mechanism for switching from a state to an open state is provided. That is, when the end portion 73t performs a pulling operation for pressing the movable arm 62, the latch mechanism 6 performs a trip operation.
  • the operation characteristics of the main circuit breaker 100 to which the tripping device 7 is applied will be described with reference to FIG.
  • the horizontal axis indicates the current value
  • the vertical axis indicates time.
  • the vertical axis may be linear or logarithmic.
  • the operating characteristic curve Mm shows the current dependency of the operating time of the circuit breaker to which the tripping device 7 is applied, and this operating time starts when the tripping device 7 starts the tripping operation, and the circuit breaker enters the trip operation.
  • This current value is a current value flowing through the first conductor 71.
  • the main circuit breaker 100 is set so that the bimetal mechanism 7b is utilized for the long-time operation, while the magnetic circuit mechanism is used for the short-time operation.
  • the part 7ma is set to be utilized.
  • the operating characteristic curve Mc indicates the current dependency of the operating time of the circuit breaker to which the conventional tripping device is applied.
  • the circuit breaker will not trip and will continue to supply power to the load. That is, the tripping device 7 does not perform the tripping operation.
  • the tripping device 7 executes the long time operation for a relatively long time between the operation time Tm and the operation time Tt after the occurrence of such an overcurrent.
  • the tripping operation by the magnetic circuit mechanism unit 7ma of the tripping device 7 is executed, and the circuit breaker is tripped. That is, the trip device 7 performs a short time operation in a relatively short time from the occurrence of such an overcurrent to an operation time Tm or less.
  • the trip operation started by the bimetal mechanism 7b and the magnetic circuit mechanism 7ma described above is also executed by a circuit breaker to which a conventional tripping device is applied.
  • a circuit breaker to which a conventional tripping device is applied.
  • the difference in operation between the conventional tripping device and the tripping device 7 shown in the first embodiment will be described. Referring to FIG. 10 and FIG. 11, when the magnetic circuit mechanism portion 7ma of the tripping device 7 performs a tripping operation to reach a short time operation, and when the conventional tripping device performs the tripping operation, The case of reaching the operation will be described.
  • FIG. 10 shows a case where the current value flowing through the first conductor 71 becomes equal to or greater than the current threshold value Im, and the magnetic circuit mechanism unit 7ma of the tripping device 7 reaches the tripping operation, and the conventional tripping device trips the operation. It is a graph which shows the time change of each parameter in the case of reaching.
  • FIG. 10A shows the change over time of the current value flowing through the first conductor 71 of the trip device 7.
  • FIG. 10B shows a characteristic curve Vb of time variation of the rotational torque generated on the rotation shaft 76 of the tripping device 7 and a characteristic curve Cb of time variation of the rotational torque generated on the rotation shaft of the conventional tripping device. Indicates.
  • FIG. 10A shows the change over time of the current value flowing through the first conductor 71 of the trip device 7.
  • FIG. 10B shows a characteristic curve Vb of time variation of the rotational torque generated on the rotation shaft 76 of the tripping device 7 and a characteristic curve Cb of time variation of
  • FIG. 10C shows a characteristic curve Vc of the angular velocity of the rotating shaft 76 of the tripping device 7 with time and a characteristic curve Cc of the angular velocity of the rotating shaft of the conventional tripping device with time.
  • FIG. 10 (d) shows a characteristic curve Vd of the temporal change of the angular displacement of the rotary shaft 76 of the tripping device 7 and a characteristic curve Cd of the temporal change of the angular displacement of the rotary shaft of the conventional tripping device. .
  • the characteristics of the conventional tripping device are shown under the following constant conditions.
  • the maximum value of the angular displacement of the conventional tripping device is the same as the maximum angular displacement amount ⁇ 4 of the tripping device 7, and the time until the maximum angular displacement amount ⁇ 4 is reached is time tc4.
  • the context of time tc4 and time t2, which will be described later, is displayed when time tc4> time t2.
  • time tc4 time t2> time t2.
  • FIG. 11 shows the operating state of the movable iron core 74 when the value of the current flowing through the first conductor 71 is equal to or greater than the current threshold value Im and angular displacement occurs in the rotating shaft 76.
  • the operation state of the movable iron core 74 only the first conductor 71, the second conductor 72, the movable iron core 74, and the rotating shaft 76 of the tripping device 7 are shown in the drawing. Note that the counterclockwise rotation on the paper surface of FIG. 11 will be described as a positive direction.
  • FIG. 11A shows a non-operating state of the tripping device 7 as in FIG. FIG.
  • FIG. 11B shows a state in which the value of the current flowing through the first conductor 71 becomes equal to or greater than the current threshold value Im, a positive direction rotational torque is generated, and the movable iron core 74 starts operating.
  • FIG. 11C is a state after FIG. 11B, and shows a state when the rotational torque becomes zero. Further, FIG. 11D shows a state after FIG. 11C, in which the rotational torque is in a negative direction.
  • FIG. 11A shows a state between time zero and time t1 before the value of the current flowing through the first conductor 71 becomes equal to or greater than the current threshold value Im.
  • the rotation torque is not generated or negligible between time zero and time t1. Therefore, the angular velocity is zero and the angular displacement is zero.
  • the suction leg 74p of the movable iron core 74 holds the gap g with the fixed iron core 75 by the elastic force of the return spring. That is, the suction leg 74p maintains the initial position.
  • FIG. 11B shows one state between time t1 and time t2.
  • a concentric magnetic field is generated around the first conductor 71.
  • the strength increases, and the magnetic attractive force between the fixed iron core 75 and the attraction leg 74p of the movable iron core 74 is enhanced. Furthermore, this magnetic attraction force exceeds the elastic force of the return spring, generating a positive rotational torque. Due to this rotational torque, a positive angular velocity is generated, and the angular displacement becomes the positive angular displacement ⁇ 1.
  • the angular displacement amount ⁇ 1 is a point that is greater than zero and less than the angular displacement amount ⁇ 2, which will be described later.
  • the rotational torque in the positive direction is generated and the angular velocity increases. .
  • FIG. 11C shows a state at time t2.
  • time t2 is the time when the rotational torque becomes zero, and the angular displacement amount in this case is angular displacement amount ⁇ 2.
  • the suction leg 74p approaches the fixed iron core 75, the magnetic attraction force between the fixed iron core 75 and the suction leg 74p decreases, and the elastic force of the return spring balances with the magnetic attraction force, resulting in rotational torque. It becomes zero.
  • the rotational torque is zero, but the positive angular velocity is maintained. That is, the movement continues according to the law of inertia.
  • the suction leg 74p is moved away from the fixed iron core 75, the magnetic attraction force is increased again between the fixed iron core 75 and the suction leg 74p, and the elastic force of the return spring is also applied in the negative direction. Increases in the negative direction.
  • the suction leg 74p is displaced in a direction crossing the fixed iron core 75 and the first conductor 71, reaches the surface 71r side of the first conductor 71 on the right side of FIG. 11 and moves away from the fixed iron core 75.
  • the suction legs 74p are arranged at both ends of the rotation support portion 74r, the suction legs 74p can be displaced to the surface 71r side of the first conductor 71.
  • FIG. 11D shows a state at time t3.
  • time t3 is the time when trip device 7 executes the short time operation.
  • the latch mechanism 6 performs a trip operation, and the current flowing through the first conductor 71 decreases rapidly.
  • the angular displacement amount is the angular displacement amount ⁇ 3.
  • the maximum angular displacement amount ⁇ 4 is the maximum value of the angular displacement amount and is determined by the mechanical configuration of the tripping device 7. Furthermore, the time when the maximum angular displacement amount ⁇ 4 is reached is time t4.
  • the angular displacement amount ⁇ 3 at which the short time operation is executed is set to a value between the angular displacement amount ⁇ 2 and the maximum angular displacement amount ⁇ 4 at which the rotational speed is negative and the angular velocity is reduced. That is, the tripping operation is set to be executed between time t2 and time t4.
  • the movable iron core 74 is displaced while increasing the angular velocity, and then displaced while decreasing the angular velocity, and then the trip device 7.
  • Performs a tripping operation (short-time operation).
  • the movable iron core 74 is displaced while increasing the operation speed, and then is displaced while decreasing the operation speed.
  • the tripping device 7 executes a tripping operation (short-time operation).
  • the tripping device 7 according to the first embodiment will be described.
  • the tripping device 7 according to the first embodiment is set so that the tripping operation is performed between the time t2 and the time t4. For example, by adjusting the distance between the protruding end surface 74t and the movable arm 62, the time until the tripping operation can be easily set.
  • the tripping device 7 is set so as to execute the tripping operation between the time t1 and the time t4. It is also possible to do.
  • the conventional tripping device does not include a mechanism for turning the rotational torque from positive to negative, and as shown by the characteristic curve Cb, the angular velocity also increases. Just do not decrease. That is, in the conventional tripping device, the tripping operation is executed between time t1 and time tc4. Therefore, when the maximum angular displacement amount of the conventional tripping device is compared as the maximum angular displacement amount ⁇ 4 of the tripping device 7, time tc4 ⁇ time t4.
  • the main circuit breaker 100 and the branch circuit breakers 101 to 103 are configured only by the conventional tripping device. It is difficult to provide a difference between the operation time of the main circuit breaker 100 and the operation time of the branch circuit breakers 101 to 103.
  • the tripping device 7 of the first embodiment constitutes the main circuit breaker 100, and the conventional tripping device comprises the branch circuit breakers 101 to 103, so that the operation time of the main circuit breaker 100 can be reduced. Since the operation time of the branch circuit breakers 101 to 103 can be set to the time t1 to the time tc4 by setting the time tc4 to the time t4, a difference from the operation time can be easily provided.
  • the difference in the time setting for the short time operation between the tripping device 7 of the first embodiment and the conventional tripping device is mainly due to the structure of the movable iron core 74.
  • the suction leg portion 74p is connected to both ends of the rotation support portion 74r, the suction leg portion 74p is displaced in a direction crossing the fixed iron core 75 and the first conductor 71, and further, Since it is configured to be displaceable up to the surface 71r side, the tripping operation can be set between time t2 and time t4.
  • the movable iron core is not provided with a structure that can rotate to the surface 71r side of the first conductor 71, and therefore the tripping operation cannot be set between time tc4 and time t4. .
  • the long time operation by the bimetal mechanism 7b will be described. Since it is possible to provide a degree of curvature due to temperature by distributing the thickness of the two metal plates of bimetal, the tripping device 7 of the first embodiment and the conventional tripping device operate for a long time. The current region can be easily set.
  • the operation characteristic curve Mm of the main circuit breaker 100 and the operation characteristic curve Mc of the branch circuit breakers 101 to 103 do not easily intersect with each other due to the setting of the bimetal mechanism 7b and the setting of the magnetic circuit mechanism 7ma.
  • the application of the tripping device 7 of the first embodiment makes it possible to easily perform selective interruption in the entire overcurrent region.
  • circuit breaker trip device that can easily set a wide range of operation time of the circuit breaker and can be selectively cut off in a wide current range. . Furthermore, this tripping device can provide a highly reliable power distribution system.
  • FIG. 12 shows a modification of the movable iron core 74 that changes the center of gravity and the weight of the movable iron core 74.
  • the movable iron core 74A has a convex portion 74q on the left side of the drawing surface of the suction leg portion 74p.
  • the convex portion 74q is heavier than the movable iron core 74, and the center of gravity is set on the left side of the drawing compared to the movable iron core 74.
  • the movable iron core 74B has a convex portion 74q in the portion on the right side of the drawing leg of the suction leg portion 74p.
  • the convex portion 74q is heavier than the movable iron core 74, and the center of gravity is set on the right side of the drawing compared to the movable iron core 74.
  • the movable iron core 74C has a curved portion 74s at the portion of the suction leg portion 74p, and is formed so that a portion below the paper surface of the suction leg portion 74p bends leftward on the paper surface.
  • the center of gravity is set on the left side of the paper surface as compared with the movable iron core 74.
  • the movable iron core 74D has a curved portion 74s at the suction leg portion 74p, and is formed such that a portion below the paper surface of the suction leg portion 74p is bent in the right direction on the paper surface.
  • the center of gravity is set on the right side of the drawing compared to the movable iron core 74. Even if a bending portion is provided between the movable arm 62 and the rotation support portion 74r and the movable arm 62 is formed to bend rightward or leftward on the paper surface, the position of the center of gravity is set.
  • the time until the tripping operation can be easily set. It can. Furthermore, by adjusting the gap g, the time until the tripping operation can be easily set by moving the initial position of the suction leg 74p.
  • Embodiment 2 when the value of the current flowing through the first conductor 71 is equal to or greater than the current threshold value Im, the movable iron core 74 is displaced while increasing the angular velocity, and then decreasing the angular velocity. It has been explained that the displacement and then the tripping operation is performed.
  • the movable iron core 74 when the value of the current flowing through the first conductor 71 is equal to or greater than the current threshold value Im, the movable iron core 74 is displaced while increasing the angular velocity, and thereafter is displaced while decreasing the angular velocity, and again the angular velocity.
  • a tripping device 7A that displaces while moving up and then executes a tripping operation will be described.
  • FIG. 13 is a graph showing the time change of each parameter when the value of the current flowing through the first conductor 71 becomes equal to or greater than the current threshold value Im and the magnetic circuit mechanism unit of the tripping device 7 reaches the tripping operation.
  • 13A shows the time change of the current value flowing through the first conductor 71
  • FIG. 13B shows the time change of the rotational torque generated in the rotating shaft 76
  • FIG. The time change of angular velocity is shown.
  • FIG. 13D shows a change with time of the angular displacement of the rotating shaft 76.
  • FIG. 14 shows the operating state of the movable iron core 74 when the value of the current flowing through the first conductor 71 becomes equal to or greater than the current threshold value Im and angular displacement occurs in the rotating shaft 76.
  • the operation state of the movable iron core 74 only the first conductor 71, the second conductor 72, the movable iron core 74, and the rotating shaft 76 of the tripping device 7A are shown in the drawing. Note that the counterclockwise rotation on the paper surface of FIG. 14 will be described as a positive direction.
  • the suction leg 74p is fixed by the magnetic attractive force between the fixed iron core 75 and the movable iron core 74.
  • the movable iron core 74 is attracted to the iron core 75 and rotated in the forward direction, and thereafter, a tripping operation is executed.
  • the tripping device 7 ⁇ / b> A according to the second embodiment electrically connects the second conductor 72 to the first conductor 71.
  • the second conductor 72 is disposed at a position where a magnetic attraction force is generated between the second conductor 72 and the suction leg 74p after the suction leg 74p is displaced and the movable iron core 74 is angularly displaced. Composed.
  • the suction leg 74p is configured to be displaceable in the direction of the second conductor 72. That is, in the tripping device 7A according to the second embodiment, similarly to the tripping device 7, the fixed iron core 75, the movable iron core 74, and the first conductor 71 constitute the magnetic circuit mechanism portion 7ma. , And the second conductor 72 constitute a magnetic circuit mechanism portion 7mb.
  • FIG. 14A shows a state between time zero and time t1 before the value of the current flowing through the first conductor 71 becomes equal to or greater than the current threshold value Im, as in FIG. 11A.
  • the rotation torque is not generated or negligible between time zero and time t1. Therefore, the angular velocity is zero and the angular displacement is zero. That is, the suction leg 74p maintains the initial position.
  • FIG. 14B shows one state between time t1 and time t2, similarly to FIG. 11B.
  • a concentric magnetic field is generated around first conductor 71.
  • the strength increases, and the magnetic attractive force between the fixed iron core 75 and the attraction legs 74p of the movable iron core 74 is also increased. Further, this magnetic attraction force exceeds the elastic force of the return spring, and a positive rotational torque is generated. Due to this rotational torque, a positive angular velocity is generated, and the angular displacement becomes the positive angular displacement ⁇ 1.
  • the angular displacement amount ⁇ 1 is a point that is greater than zero and less than the angular displacement amount ⁇ 2, which will be described later.
  • the rotational torque in the positive direction is generated and the angular velocity increases. .
  • the rotational torque becomes zero, and the angular displacement amount in this case is the angular displacement amount ⁇ 2.
  • the rotational torque is zero, but the positive angular velocity is maintained. That is, the movement continues according to the law of inertia.
  • the angular displacement amount becomes larger than the angular displacement amount ⁇ 2 from time t2 to t5 after the elapse of time.
  • the movable iron core 74 is moved away from the fixed iron core 75, the magnetic attraction force is increased again between the fixed iron core 75 and the movable iron core 74, the elastic force of the return spring is also applied in the negative direction, and the negative rotational torque is increased. Strengthen.
  • FIG. 14C shows a state at time t5.
  • time t5 is a time when the rotational torque becomes zero again, and the angular displacement amount in this case is angular displacement amount ⁇ 5.
  • This state is a state in which the magnetic attraction force between the fixed iron core 75 and the attraction leg portion 74p and the magnetic attraction force between the attraction leg portion 74p and the second conductor 72 are balanced and the rotational torque becomes zero. .
  • FIG. 14D shows the state at time t6.
  • time t6 is a time when trip device 7A executes the short time operation.
  • the angular displacement amount in this case is the angular displacement amount ⁇ 6.
  • the angular displacement ⁇ 7 is the maximum value of the angular displacement and is determined by the mechanical configuration of the tripping device 7A.
  • the time when the angular displacement amount ⁇ 7 is reached is time t7. That is, the time for which the tripping device 7A executes the tripping operation is set to the time t6 between the time t5 and the time t7.
  • This state is a state in which the magnetic attractive force between the movable iron core 74 and the second conductor 72 is greater than the magnetic attractive force between the fixed iron core 75 and the movable iron core 74, and the balanced rotational torque is in the positive direction.
  • the tripping operation is performed between time t2 and time t4.
  • the tripping operation is performed at time t2. It can be set to execute during time t7. That is, the tripping device 7A according to the second embodiment can extend the period for setting the tripping operation, compared with the tripping device 7 according to the first embodiment.
  • the movable iron core 74 is displaced while increasing the operation speed, and then is displaced while decreasing the operation speed. Displacement is performed while increasing the angular velocity, and then the tripping device 7A executes a tripping operation (short-time operation), so the period for setting the tripping operation can be extended.
  • the tripping operation can be set to be executed between the times t1 and t2
  • the tripping device 7A is set to execute the tripping operation between the times t1 and t7. It is also possible to do.
  • this tripping device can provide a highly reliable power distribution system.
  • the tripping device (7, 7A) has the movable iron cores 74, 74A to 74D centered on the rotation shaft 76 when the current value flowing through the first conductor 71 is equal to or greater than the current threshold value Im. It has been explained that the displacement operation is performed and the tripping operation is executed.
  • the movable iron core 84 of the tripping device 8 moves straight and performs the tripping operation.
  • the third embodiment will explain a tripping device 8 that is applied only to a short time operation.
  • Embodiment 3 of the present invention will be described in detail with reference to FIGS. 15 to 18, the same reference numerals or reference numerals as those in FIGS. 1 to 14 are the same as or equivalent to the components shown in the first embodiment, and detailed description thereof is omitted.
  • FIGS. 15 and 16 are cross-sectional views of the tripping device 8 in a non-operating state
  • FIG. 16 is a perspective view for explaining the positions of the movable rod 81, the first conductor 82, and the movable iron core 84 of the components of the tripping device 8.
  • the first conductor 82 is disposed so as to surround the movable iron core 84. Furthermore, one end of the first conductor 82 is connected to the first terminal block 13 (not shown), and the other end of the first conductor 82 is connected to the first conductor 11 (not shown).
  • a movable bar 81 is connected to the upper part of the movable iron core 84.
  • the fixed iron core 85 is disposed so as to surround the movable rod 81 and the first conductor 82, and has an opening so that the movable rod 81 passes through the upper portion of the fixed iron core 85.
  • the movable bar 81 is configured to be linearly movable in the vertical direction on the paper surface of FIG. 15, and a trip bar 61 is disposed above the end 81t of the movable bar 81 (not shown).
  • the first conductor 82, the movable iron core 84, and the fixed iron core 85 constitute the magnetic circuit mechanism unit 8mc of the tripping device 8, and perform a short time operation.
  • FIG. 17 is a graph showing the time change of each parameter when the value of the current flowing through the first conductor 82 becomes equal to or greater than the current threshold value Im and the magnetic circuit mechanism unit 8mc reaches the tripping operation.
  • 17A shows the time change of the current value flowing through the first conductor 82
  • FIG. 17B shows the time change of the driving force generated in the movable core 84
  • FIG. It shows the time change of the straight speed.
  • FIG. 17D shows a change over time of the linear displacement of the movable core 84.
  • FIG. 18 shows an operating state of the movable iron core 84 when the value of the current flowing through the first conductor 82 becomes equal to or greater than the current threshold value Im and the movable iron core 84 is displaced.
  • the description will be made assuming that the direction from the bottom to the top in FIG. 18 is the positive direction.
  • FIG. 18A shows a non-operating state of the tripping device 8 as in FIG.
  • FIG. 18B shows a state in which the value of the current flowing through the first conductor 82 is equal to or greater than the current threshold value Im, a positive force is generated, and the movable iron core 84 starts operating.
  • FIG. 18C is a state after FIG. 18B, and shows a state when the driving force applied to the movable iron core 84 becomes zero.
  • FIG. 18D shows a state after FIG. 18C, in which the driving force applied to the movable iron core 84 is in the negative direction.
  • FIG. 18A shows a state between time zero and time t1 before the current value flowing through the first conductor 82 becomes equal to or greater than the current threshold value Im.
  • the initial position is stabilized by the elastic force of the return spring, and the driving force applied to the movable iron core 84 is not generated or can be ignored. is there. Accordingly, the straight speed is zero and the straight displacement is zero.
  • FIG. 18B shows one state between time t1 and time t2.
  • the value of the current flowing through the first conductor 82 becomes equal to or greater than the current threshold value Im from time t1 to time t2
  • a concentric magnetic field is generated around the first conductor 82.
  • the strength increases, and the magnetic attractive force between the upper portion 85u of the fixed iron core 85 and the movable iron core 84 is also increased. Furthermore, this magnetic attraction force exceeds the elastic force of the return spring, and a positive driving force is generated.
  • This driving force generates a speed in the positive direction, and the amount of linear displacement becomes the amount of linear displacement L1 in the positive direction.
  • the rectilinear displacement amount L1 is one point that is greater than zero and less than the rectilinear displacement amount L2, which will be described later. is there.
  • FIG. 18C shows a state at time t2.
  • time t2 is the time when the driving force becomes zero, and the linear displacement amount is linear displacement L2.
  • the driving force becomes zero because the elastic force of the return spring increases as the movable iron core 84 approaches the upper portion 85u of the fixed iron core 85, and the elastic force of the return spring balances with the magnetic attractive force.
  • the driving force is zero, but the speed in the positive direction is maintained. That is, the movement continues according to the law of inertia. Further, since the speed in the positive direction is maintained at time t2, the linear displacement amount becomes larger than the linear displacement amount L2 after time t2.
  • FIG. 18D shows a state at time t3.
  • time t3 is a time when trip device 8 executes the short time operation.
  • the latch mechanism 6 performs an operation of switching from the closed state to the open state, the current flowing through the first conductor 82 is rapidly reduced. In this case, it is the linear displacement L3.
  • the rectilinear displacement amount L4 is the maximum value of the rectilinear displacement amount, and is determined by the mechanical configuration of the tripping device 8.
  • the time when reaching the straight displacement L4 is time t4.
  • the rectilinear displacement amount L3 at which the short time operation is executed is set to be a value between the rectilinear displacement amount L2 and the rectilinear displacement amount L4 at which the driving force is negative and the angular velocity is reduced.
  • the movable iron core 84 is displaced while increasing the straight traveling speed, and then is displaced while decreasing the straight traveling speed.
  • the removal device 8 performs a tripping operation.
  • the movable iron core 84 is displaced while increasing the operating speed, and then is displaced while decreasing the operating speed.
  • the tripping device 8 performs a tripping operation.
  • the tripping operation can be set between time t2 and time t4, so that selective shutoff is easy. Will be possible.
  • the tripping operation can be set to be executed between the time t1 and the time t2
  • the tripping device 8 is set to execute the tripping operation between the time t1 and the time t4. It is also possible to do.
  • a tripping device for a circuit breaker that can be easily set with a wide setting range of the operation time of the circuit breaker and can be selectively cut off in a wide current range. . Furthermore, this tripping device can provide a highly reliable power distribution system.
  • Embodiment 4 FIG.
  • the tripping operation is performed as follows.
  • a concentric magnetic field is generated around the first conductor 71, and a magnetic attractive force is generated between the fixed iron core 75 and the movable iron core 74.
  • this magnetic attractive force (hereinafter referred to as a positive magnetic attractive force) attracts the attracting leg portion 74p of the movable iron core 74 to the fixed iron core 75, and the movable iron core 74 rotates in the rotation direction rm.
  • the projecting end surface 74t of the movable iron core 74 moves in the direction dm, and the tripping device 7 executes the tripping operation.
  • one end of the suction leg 74p of the tripping device 7 is displaced in a direction crossing the first conductor 71, and a tripping operation is executed.
  • a magnetic attraction force (hereinafter, opposite) is prevented in a direction that prevents one end of the attraction leg portion 74p from being displaced in a direction crossing the first conductor 71.
  • the tripping device 9 that generates a magnetic attracting force in the direction) will be described.
  • the magnetic attracting force in the positive direction exceeds the magnetic attracting force in the opposite direction, and the movable iron core 74 rotates in the rotational direction rm and performs the tripping operation.
  • FIGS. 21 is a perspective view of the tripping device 9
  • FIG. 22 is an explanatory view of the magnetic flux M1 at the cross-sectional position D1 surrounded by a dotted line in FIG. 21, and
  • FIG. 23 is a cross-sectional position surrounded by a dotted line in FIG. It is explanatory drawing of the magnetic flux M2 in D2.
  • the cross-sectional position D1 indicates a position of a cross section including an initial suction portion 95c and a suction leg portion 74p, which will be described later
  • the cross-sectional position D2 is a position of a cross section below the tripping device 9 compared to the cross-sectional position D1.
  • the initial suction part 95c is not included, and the suction leg part 74p is included.
  • 21 to 23 the same reference numerals or the same reference numerals as those in FIGS. 1 to 12 are the same as or equivalent to the components shown in the first embodiment, and thus detailed description thereof is omitted.
  • the main difference in structure between the tripping device 9 of the fourth embodiment and the tripping device 7 of the first embodiment is the difference in structure between the fixed iron core 95 and the fixed iron core 75.
  • the fixed iron core 95 has a fixed arm portion 95b whose one end is connected to the main body portion 95a of the fixed iron core 95, and an initial suction portion 95c connected to the other end of the fixed arm portion 95b.
  • the fixed iron core 75 does not have the initial adsorption part 95c.
  • the fixed arm portion 95b is disposed so that one end of the suction leg portion 74p extends in a direction opposite to the direction crossing the first conductor 71 during the tripping operation, and the initial suction portion 95c is in the initial position. It arrange
  • the fixed arm portion 95b and the initial attracting portion 95c are made of a magnetic material.
  • the magnetic flux M ⁇ b> 1 is a magnetic flux that is generated when a current flows through the first conductor 71 and circulates around the first conductor 71, and is interposed between the fixed core 95 and the movable iron core 74 by the magnetic flux M ⁇ b> 1. Produces positive magnetic attraction.
  • the path of the magnetic flux M1 will be described.
  • the magnetic flux M1 branches from the main body portion 95a of the fixed iron core 95 through the fixed arm portion 95b on the right side of the paper, and branches into the magnetic flux M1m and the magnetic flux M1s at the initial attracting portion 95c on the right side of the paper.
  • the magnetic flux M1m passes from the initial suction part 95c on the right side of the paper through the space between the initial suction part 95c on the right side of the paper and the initial suction part 95c on the left side of the paper, and reaches the initial suction part 95c on the left side of the paper.
  • the magnetic flux M1s passes through the space between the suction leg 74p on the right side of the paper and the suction leg 74p on the left side of the paper through the suction leg 74p on the right side of the paper from the initial suction part 95c on the right side of the paper. Reaches the suction leg 74p.
  • the magnetic flux M1s reaches the initial suction portion 95c on the left side of the paper surface from the suction leg portion 74p on the left side of the paper surface.
  • the magnetic flux M1m and the magnetic flux M1s merge at the initial adsorption portion 95c on the left side of the page to become the magnetic flux M1.
  • the magnetic flux M1 passes through the fixed arm portion 95b on the left side of the paper, reaches the main body portion 95a, and circulates.
  • the magnetic flux M1s passes from the initial suction part 95c on the right side of the paper to the suction leg part 74p on the right side of the paper and from the suction leg part 74p on the left side of the paper to the initial suction part 95c on the left side of the paper.
  • a magnetic attraction force is generated between the suction leg 74p.
  • a magnetic attractive force in the opposite direction is generated. That is, at the initial position, a magnetic attractive force in the positive direction is generated by the magnetic flux M1, and a magnetic attractive force in the opposite direction is also generated at the same time.
  • the magnetic flux M2 is a magnetic flux that is generated when a current flows through the first conductor 71 and circulates around the first conductor 71, and between the fixed iron core 75 and the movable iron core 74 by the magnetic flux M2. Produces positive magnetic attraction.
  • the path of the magnetic flux M2 will be described.
  • the magnetic flux M2 passes through the space between the main body 95a of the fixed iron core 95 and the suction leg 74p on the right side of the paper, and reaches the suction leg 74p on the right side of the paper.
  • the magnetic flux M2 passes through the space between the suction leg 74p on the right side of the paper and the suction leg 74p on the left side of the paper, and reaches the suction leg 74p on the left side of the paper. Further, the magnetic flux M2 reaches the main body portion 95a through the space between the suction leg portion 74p on the left side of the paper surface and the main body portion 95a, and circulates. Further, since the magnetic flux M2 branches and does not pass from the initial attracting portion 95c to the attracting leg portion 74p, no magnetic attracting force in the opposite direction is generated. In other words, the magnetic flux M2 does not generate a magnetic attractive force in the opposite direction, but generates a magnetic attractive force in the positive direction.
  • the position where the magnetic attractive force in the opposite direction is generated is only the portion of the suction leg portion 74p where the initial attracting portion 95c approaches or contacts in the initial position, but the other suction leg portion 74p is in the forward direction. Only magnetic attraction force is generated. That is, there are more parts where only the magnetic attractive force in the forward direction is generated than parts where the magnetic attractive force in the opposite direction is generated. For this reason, the total amount of magnetic attractive force in the positive direction exceeds the total amount of magnetic attractive force in the opposite direction.
  • the magnetic attracting force in the opposite direction rapidly decreases due to the distance between the initial attracting portion 95c and the attracting leg portion 74p. For this reason, when the movable iron core 74 starts to be displaced from the initial position, the influence of the magnetic attraction force in the opposite direction on the rotation of the movable iron core 74 rapidly decreases.
  • the tripping device 9 performs a tripping operation.
  • the tripping device 9 of the fourth embodiment has a higher current threshold Im than the tripping device 7 of the first embodiment because the magnetic attracting force in the positive direction needs to exceed the magnetic attraction force in the opposite direction. It is possible to set. Further, it is possible to set the magnetic saturation amount of the magnetic flux M1s by setting the area close to or in contact with the suction leg 74p of the initial attracting portion 95c at the initial position, the cross-sectional area of the path of the magnetic flux M1s, and the like. The strength of the magnetic attractive force in the opposite direction can be set.
  • the current threshold value Im is set by setting the area close to or in contact with the suction leg portion 74p of the initial attracting portion 95c at the initial position, the cross-sectional area of the path of the magnetic flux M1s, and the tripping device 9 performs the tripping operation
  • the time to reach can be set.
  • the tripping devices (7, 7A) of the first and second embodiments determine the current threshold value Im based on the elastic force of the return spring and the positive magnetic attraction force. Since the tripping device 9 can independently set the magnetic attractive force in the opposite direction, the setting range of the current threshold Im can be expanded.
  • this tripping device can provide a highly reliable power distribution system.
  • the movable iron cores 74 and 74A have two suction legs 74p.
  • the suction legs 74p are displaced to the surface 71r side of the first conductor 71. If the structure is displaced, the number of suction legs 74p may be one. The present invention does not limit the number of suction legs 74p.
  • fixed iron core 75 is made of a magnetic material. Even if the fixed iron core 75 made of a magnetic material is not disposed, if a sufficient magnetic attraction force acts between the first conductor 71 and the movable iron core 74, the fixed iron core 75 made of a magnetic material is installed. There is no need, and instead of the fixed iron core 75, a member other than the magnetic body that holds the movable iron core 74 may be used. For example, examples of this member include aluminum and plastic. Further, when a member other than the magnetic body instead of the fixed iron core 75 holds the movable iron core 74, the magnetic circuit mechanism portion 7 ma includes the movable iron core 74 and the first conductor 71.
  • the first conductor 71 and the second conductor 72 are connected in series.
  • the first conductor 71 and the second conductor 72 are integrally formed. It may be good. That is, the present invention does not limit the method of forming the first conductor 71 and the second conductor 72.
  • the tripping device (7, 7A, 8, 9) of the present invention is applied to the main circuit breaker 100, and the conventional tripping device is applied to the branch circuit breakers 101 to 103.
  • the tripping device (7, 7A, 8, 9) of the present invention is also applied to the main circuit breaker 100 and the branch circuit breakers 101 to 103 until the tripping operation is performed. By setting the time individually, it is possible to easily perform selective blocking.
  • the connection of the two-level circuit breaker in which the branch circuit breakers 101 to 103 are connected in parallel to the main circuit breaker 100 has been described.
  • the tripping device (7, 7A, 8, 9) of the present invention is also applied to the connection of the three-level circuit breakers that connect the branch circuit breakers, and the time until the tripping operation is individually set. By doing so, selective blocking can also be easily performed. That is, the present invention does not limit the number of circuit breaker connection levels. In the configuration of the conventional tripping device, the problem that it is difficult to connect the circuit breakers of three or more layers because the setting range of the operation time of the conventional tripping device is narrow is more serious. On the other hand, according to the present invention, the selection interruption can be easily performed by individually setting the time until the trip operation of the trip device.
  • the non-operating gap g is held by the elastic force of the return spring
  • the return spring is not necessarily required, and an elastic body such as plastic may be used. That is, the present invention does not limit the type of elastic body corresponding to the first return spring.
  • the non-operating gap g is held by the elastic force of the return spring, it is not necessary to hold the operating gap g by the elastic force.
  • the moving core 74 is held by its own weight or the position of the center of gravity. You may do it. That is, the method of the gap g in the non-operating state of the present invention is not limited.
  • the embodiments can be freely combined, or the embodiments can be appropriately changed or omitted.
  • the first conductor 71 and the first conductor 82 are the first conductors described in the claims.
  • the magnetic circuit mechanism unit 7ma and the magnetic circuit mechanism unit 8mc are the first magnetic circuit mechanism unit described in the claims.
  • the magnetic circuit mechanism portion 7mb is a second magnetic circuit mechanism portion described in the claims.
  • the second conductor 72 is a second conductor described in the claims.
PCT/JP2019/009060 2018-03-23 2019-03-07 引き外し装置 WO2019181532A1 (ja)

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JPH05342967A (ja) * 1992-06-04 1993-12-24 Mitsubishi Electric Corp 回路遮断器
JP2002222624A (ja) * 2001-01-26 2002-08-09 Matsushita Electric Works Ltd 回路遮断器の引外し装置

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JP3072662B2 (ja) * 1991-11-22 2000-07-31 株式会社明電舎 直流高速度遮断器
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JP4510528B2 (ja) * 2004-06-11 2010-07-28 テンパール工業株式会社 回路遮断器の瞬時引外し装置
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JP5405971B2 (ja) * 2008-11-07 2014-02-05 三菱電機株式会社 回路遮断器
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JPH05342967A (ja) * 1992-06-04 1993-12-24 Mitsubishi Electric Corp 回路遮断器
JP2002222624A (ja) * 2001-01-26 2002-08-09 Matsushita Electric Works Ltd 回路遮断器の引外し装置

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