WO2021205518A1 - Disjoncteur - Google Patents

Disjoncteur Download PDF

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Publication number
WO2021205518A1
WO2021205518A1 PCT/JP2020/015558 JP2020015558W WO2021205518A1 WO 2021205518 A1 WO2021205518 A1 WO 2021205518A1 JP 2020015558 W JP2020015558 W JP 2020015558W WO 2021205518 A1 WO2021205518 A1 WO 2021205518A1
Authority
WO
WIPO (PCT)
Prior art keywords
arc runner
movable
magnet
fixed
circuit breaker
Prior art date
Application number
PCT/JP2020/015558
Other languages
English (en)
Japanese (ja)
Inventor
康宏 神納
雄大 相良
央 佐々木
康平 松村
知裕 仲田
遠矢　将大
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 PCT/JP2020/015558 priority Critical patent/WO2021205518A1/fr
Priority to JP2020553560A priority patent/JP6827604B1/ja
Publication of WO2021205518A1 publication Critical patent/WO2021205518A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/20—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • This disclosure relates to circuit breakers.
  • Patent Document 1 Japanese Patent Publication No. 2009-501408
  • the circuit breaker described in Patent Document 1 includes a fixed contact element, a movable contact element, an electrode, a permanent magnet, and a guide horn. The arc generated between the fixed contact element and the movable contact element is driven toward the electrode by the electromagnetic force of the permanent magnet.
  • the present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a circuit breaker capable of interrupting a small current arc.
  • the circuit breaker based on the present disclosure includes a fixed contact, a movable contact, an arc extinguishing chamber, a pair of side wall plates, a fixed arc runner, a movable arc runner, a first magnetic field applying portion, and a second magnetic field applying portion. And.
  • the movable contact can be connected to and separated from the fixed contact.
  • the arc extinguishing chamber is arranged above the fixed contact and the movable contact, and extinguishes the arc generated between the fixed contact and the movable contact.
  • the fixed-side arc runner is arranged between the arc-extinguishing chamber and the fixed contact, and is the first proximity portion closest to the fixed contact, and the movable contact side above the first proximity portion and with respect to the first proximity portion. Includes a first end located on the opposite side.
  • the movable arc runner is arranged between the arc extinguishing chamber and the movable contact, and is the second proximity portion closest to the movable contact, and the fixed contact side above the second proximity portion and with respect to the second proximity portion. Includes a second end located on the opposite side.
  • the first magnetic field application portion is located at least below the first end portion and includes a first magnet.
  • the second magnetic field application portion is located at least below the second end portion and includes a second magnet.
  • the first magnetic field application unit applies a magnetic field so that the magnetic flux passes from the first end portion to the first proximity portion of the fixed-side arc runner.
  • the second magnetic field application unit applies a magnetic field so that the magnetic flux passes from the second end portion to the second proximity portion of the movable arc runner.
  • a small current arc can be cut off by driving the arc on the arc runner to the end of the arc runner by the electromagnetic force generated by the magnetic field of the magnet.
  • FIG. 5 is a cross-sectional perspective view of the circuit breaker shown in FIG. 1 as viewed from above on the front side. It is a perspective view which shows the structure of the peripheral part of the fixed side arc runner and the movable side arc runner provided in the circuit breaker which concerns on Embodiment 1.
  • FIG. 5 is a perspective view showing a state in which an arc is generated between a fixed contact and a movable contact in the circuit breaker according to the first embodiment.
  • FIG. 5 is a perspective view showing a state in which an arc generated between a fixed contact and a movable contact spreads upward while spreading in the horizontal direction in the circuit breaker according to the first embodiment.
  • FIG. 5 is a perspective view showing a state in which an arc generated between a fixed contact and a movable contact is diverted to a fixed side arc runner and a movable side arc runner in the circuit breaker according to the first embodiment.
  • FIG. 5 is a perspective view showing a state in which the arc commuted to the fixed side arc runner and the movable side arc runner is moving so as to spread in the horizontal direction in the circuit breaker according to the first embodiment.
  • FIG. 5 is a plan view showing the distribution of magnetic force lines, the direction of the vertical component of the arc root, and the driving direction of the arc around the fixed side arc runner and the movable side arc runner in the circuit breaker according to the first embodiment.
  • FIG. 11 shows the distribution of magnetic force lines, the direction of the vertical component of the arc root, and the driving direction of the arc around the fixed side arc runner and the movable side arc runner when the directions of the arc currents are opposite to each other.
  • It is a plan view which shows. It is a front view which shows the structure of the peripheral part of the fixed side arc runner and the movable side arc runner provided in the circuit breaker which concerns on Embodiment 2.
  • FIG. It is a front view which shows the peripheral part of the fixed side arc runner and the movable side arc runner provided in the circuit breaker which concerns on Embodiment 3.
  • FIG. It is a front view which shows the peripheral part of the fixed side arc runner and the movable side arc runner provided in the circuit breaker which concerns on Embodiment 4.
  • FIG. 1 is a front view showing the configuration of the circuit breaker according to the first embodiment.
  • FIG. 2 is a cross-sectional perspective view of the circuit breaker shown in FIG. 1 as viewed from above on the front side. 1 and 2 show a state in which the circuit breaker is open.
  • the circuit breaker 100 includes a fixed contact 121, a movable contact 122, an arc extinguishing chamber 110, a fixed arc runner 140, a movable arc runner 150, and a first. It includes one magnetic field application unit 160 and a second magnetic field application unit 170.
  • the circuit breaker 100 further includes an upper conductor 120, a movable conductor 123, a flexible shunt 124, a lower conductor 125, and a pair of side wall plates 130.
  • the upper conductor 120 has a plate shape and extends in the horizontal direction.
  • the movable conductor 123 extends in the vertical direction, and the upper end portion of the movable conductor 123 faces the tip end portion of the upper conductor 120.
  • the flexible shunt 124 is bent in a substantially U shape when viewed from the front.
  • the lower conductor 125 extends horizontally at a position below the upper conductor 120.
  • the lower conductor 125 is driven in the horizontal direction by an actuator (not shown).
  • the movable contact 122 can be brought into contact with and separated from the fixed contact 121.
  • the movable contact 122 is separated from the fixed contact 121 by detecting the short-circuit current and operating the actuator.
  • a current flows from the upper conductor 120 to the lower conductor 125 through the fixed contact 121, the movable contact 122, the movable conductor 123, and the flexible shunt 124 in the energized state.
  • the circuit breaker 100 is in the closed state, and when the fixed contact 121 and the movable contact 122 are separated from each other, the circuit breaker 100 is in the open state. ..
  • the arc extinguishing chamber 110 is arranged above the fixed contact 121 and the movable contact 122, and extinguishes the arc generated between the fixed contact 121 and the movable contact 122.
  • the arc extinguishing chamber 110 includes a bottom plate 111, a grid support plate 112, and a deaion grid 113.
  • a plurality of laminated bodies in which the deaion grid 113 is laminated on the grid support plate 112 are arranged side by side in the vertical direction above the bottom plate 111 with a gap between them.
  • Each of the pair of side wall plates 130 has a flat plate shape and electrical insulation, and faces each other with a gap.
  • the pair of side wall plates 130 are arranged so as to sandwich the fixed contact 121 and the movable contact 122 between each side surface of the fixed contact 121 and the movable contact 122 with a gap.
  • FIG. 3 is a perspective view showing the configuration of the peripheral portion of the fixed side arc runner and the movable side arc runner included in the circuit breaker according to the first embodiment.
  • FIG. 4 is a plan view showing the configuration of the peripheral portion of the fixed side arc runner and the movable side arc runner included in the circuit breaker according to the first embodiment.
  • FIG. 5 is a front view showing the configuration of the peripheral portion of the fixed side arc runner and the movable side arc runner included in the circuit breaker according to the first embodiment.
  • the fixed-side arc runner 140 is a plate-shaped conductor arranged between the arc-extinguishing chamber 110 and the upper conductor 120 and the fixed contact 121.
  • the fixed-side arc runner 140 is made of a magnetic material.
  • the fixed-side arc runner 140 includes a wide portion 140v, a tapered portion 140v, and a folded portion 140r.
  • the wide portion 140v extends in a substantially horizontal direction and includes a first end portion 140e.
  • the width of the wide portion 140v is W2.
  • the wide portion 140v is located on substantially the same plane as the bottom plate 111.
  • the tapered portion 140v is connected to the end portion of the wide portion 140v opposite to the first end portion 140e, and extends diagonally downward toward the fixed contact 121.
  • the first proximity portion 140n located at the tip of the taper portion 140v is closest to the fixed contact 121.
  • the width of the tapered portion 140v becomes narrower as it approaches the fixed contact 121, and the width of the first proximity portion 140n is W1. W1 ⁇ W2 is satisfied.
  • the folded-back portion 140r is connected to the first proximity portion 140n and extends in the horizontal direction toward the side opposite to the movable contact 122 side.
  • the folded-back portion 140r is connected to the upper conductor 120.
  • the fixed-side arcrunner 140 has a first proximity portion 140n and a first end portion 140e located above the first proximity portion 140n and opposite to the movable contact 122 side with respect to the first proximity portion 140n. Includes.
  • the fixed side arc runner 140 has a front surface 140t, a back surface 140b located on the opposite side of the front surface 140t, and a side surface 140s connecting the front surface 140t and the back surface 140b and facing the side wall plate 130.
  • the edge 140c is located at the boundary position between the wide portion 140h and the tapered portion 140v.
  • the movable arc runner 150 is a plate-shaped conductor arranged between the arc extinguishing chamber 110 and the movable contact 122.
  • the movable side arc runner 150 is made of a magnetic material.
  • the movable side arc runner 150 includes a wide portion 150v, a tapered portion 150v, and a folded portion 150r.
  • the wide portion 150v extends substantially horizontally and includes a second end portion 150e.
  • the width of the wide portion 150v is W4.
  • the wide portion 150v is located on substantially the same plane as the bottom plate 111.
  • the tapered portion 150v is connected to the end portion of the wide portion 150v opposite to the second end portion 150e, and extends diagonally downward toward the movable contact 122.
  • the second proximity portion 150n located at the tip of the taper portion 150v is closest to the movable contact 122.
  • the width of the tapered portion 150v becomes narrower as it approaches the movable contact 122, and the width of the second proximity portion 150n is W3. W3 ⁇ W4 is satisfied.
  • the folded-back portion 150r is connected to the second proximity portion 150n and extends in the horizontal direction toward the side opposite to the fixed contact 121 side.
  • the folded-back portion 150r is located above the movable position of the movable contact 122 and the movable conductor 123.
  • the movable side arc runner 150 has a second proximity portion 150n and a second end portion 150e located above the second proximity portion 150n and opposite to the fixed contact 121 side with respect to the second proximity portion 150n. Includes.
  • each of the fixed side arc runner 140 and the movable side arc runner 150 is sandwiched between a pair of side wall plates 130 with a gap.
  • a gap s1 is formed between the tapered portion 140v and the side wall plate 130, and a gap s2 is formed between the wide portion 140h and the side wall plate 130.
  • the gap s1 is the largest between the first proximity portion 140n and the side wall plate 130, and becomes smaller toward the wide portion 140h. Therefore, the relationship of the size of the gap s1 ⁇ the size of the gap s2 is satisfied.
  • the gap s1 is a space in which the arc can move around the fixed contact 121.
  • the movable side arc runner 150 has a tapered portion 150v in which the width becomes wider and the gap between the pair of side wall plates 130 becomes narrower as the second proximity portion 150n approaches the second end portion 150e. Have.
  • the first magnetic field application unit 160 is composed of the first magnet 161.
  • the first magnetic field application portion 160 is located at least below the first end portion 140e.
  • the first magnet 161 is located below the first end 140e.
  • the first magnet 161 may be displaced from the position directly below the first end portion 140e.
  • the magnetic pole closer to the fixed side arc runner 140 in the first magnet 161 is the north pole, but it may be the south pole.
  • the second magnetic field application unit 170 is composed of the second magnet 171.
  • the second magnetic field application portion 170 is located at least below the second end portion 150e.
  • the second magnet 171 is located below the second end 150e.
  • the second magnet 171 may be displaced from the position directly below the second end portion 150e.
  • the magnetic pole of the second magnet 171 closer to the movable side arc runner 150 is the north pole, but it may be the south pole.
  • the magnetic pole closer to the fixed side arc runner 140 in the first magnet 161 is the same as the magnetic pole closer to the movable side arc runner 150 in the second magnet 171.
  • the magnetic pole closer to the fixed side arc runner 140 in the first magnet 161 may be different from the magnetic pole closer to the movable side arc runner 150 in the second magnet 171.
  • the first spacer 162 having electrical insulation is arranged between the first magnet 161 and the fixed side arc runner 140.
  • the first spacer 162 has a flat plate shape.
  • the first spacer 162 is attached to the back surface 140b of the fixed side arc runner 140.
  • a gap g1 is provided between the first magnet 161 and the first spacer 162.
  • the gap g1 may be provided between the first magnet 161 and the fixed-side arc runner 140.
  • a second spacer 172 having electrical insulation is arranged between the second magnet 171 and the movable side arc runner 150.
  • the second spacer 172 has a flat plate shape.
  • the second spacer 172 is attached to the back surface 150b of the movable side arc runner 150.
  • a gap g2 is provided between the second magnet 171 and the second spacer 172.
  • the gap g2 may be provided between the second magnet 171 and the movable arc runner 150.
  • FIG. 6 is a perspective view showing the distribution of magnetic force lines around the fixed side arc runner and the movable side arc runner included in the circuit breaker according to the first embodiment. Since the fixed-side arc runner 140 is made of a magnetic material, the magnetic flux of the magnetic field applied from the first magnet 161 passes through the fixed-side arc runner 140 and is guided to the periphery of the fixed contact 121. As a result, the first magnetic field application unit 160 applies the magnetic field so that the magnetic flux passes from the first end portion 140e to the first proximity portion 140n of the fixed-side arc runner 140.
  • the movable arc runner 150 is made of a magnetic material, the magnetic flux of the magnetic field applied from the second magnet 171 passes through the movable arc runner 150 and is guided to the periphery of the movable contact 122. As a result, the second magnetic field application unit 170 applies the magnetic field so that the magnetic flux passes from the second end portion 150e of the movable arcrunner 150 to the second proximity portion 150n.
  • the magnetic force lines B are distributed so as to be emitted outward from the movable side arc runner 150.
  • the magnetic force lines B face upward on the surface 150t and face the opposite side wall plates 130 on the side surface 150s. Further, the magnetic force lines B are directed downward on the surface of the movable contact 122.
  • FIG. 7 is a perspective view showing a state in which an arc is generated between the fixed contact and the movable contact in the circuit breaker according to the first embodiment.
  • FIG. 8 is a perspective view showing a state in which the arc generated between the fixed contact and the movable contact spreads upward while spreading in the horizontal direction in the circuit breaker according to the first embodiment.
  • FIG. 9 is a perspective view showing a state in which the arc generated between the fixed contact and the movable contact is commutated to the fixed side arc runner and the movable side arc runner in the circuit breaker according to the first embodiment.
  • FIG. 10 is a perspective view showing a state in which the arc commuted to the fixed side arc runner and the movable side arc runner is moving so as to spread in the horizontal direction in the circuit breaker according to the first embodiment.
  • FIG. 11 is a plan view showing the distribution of magnetic force lines, the direction of the vertical component of the arc root, and the driving direction of the arc around the fixed side arc runner and the movable side arc runner in the circuit breaker according to the first embodiment. .. 7 to 11 show the case where the arc current flows from the movable contact 122 toward the fixed contact 121.
  • the distribution of the magnetic force lines is indicated by a solid arrow
  • the driving direction of the arc is indicated by an arrow M.
  • the arc A includes an anode-side arc root Aa located at the end on the movable contact 122 side and a cathode-side arc root Ac located at the end on the fixed contact 121 side.
  • the arc A receives an electromagnetic force F1 generated by a downwardly directed magnetic force line B on the surface of the fixed contact 121 around the anode side arc root Aa and is movable around the cathode side arc root Ac. It receives the electromagnetic force F2 generated by the downwardly directed magnetic force lines B on the surface of the contact 122. As a result, the arc A is driven toward the front side in FIG. 7 and curves.
  • the curved arc A is driven so that the cathode side arc root Ac wraps around the diagonally lower left direction of FIG. 11, that is, the side surface 140s of the fixed side arc runner 140, and the anode side arc root Aa is oblique in FIG. It is driven so as to wrap around the lower right direction, that is, the side surface 150s of the movable side anode 150.
  • the arc A extends upward due to buoyancy and extends in the horizontal direction, so that the edge 140c and the gap s3 are extended as shown in FIG. It collides with the edge 150c.
  • the arc A is commutated to the fixed side arc runner 140 and the movable side arc runner 150. Since the commutated arc A extends upward due to buoyancy, the direction of the arc current is substantially upward in the vertical direction.
  • the cathode side arc root Ac is fixed by the magnetic field directed to the side wall plate 130 protruding from the side surface 140s of the wide portion 140h of the fixed side arc runner 140 and the electromagnetic force F2 generated by the arc current flowing downward. It is driven to the left in FIG. 11 along the side surface 140s of the side arc runner 140.
  • the anode-side arc root Aa is formed on the side surface 150s of the movable-side arcrunner 150 by the magnetic field from the side surface 150s of the wide portion 150h of the movable-side arcrunner 150 toward the side wall plate 130 and the electromagnetic force F1 generated by the arc current flowing upward. It is driven to the right in FIG. 11 along the line.
  • the arc A extends toward the first end 140e of the fixed-side arc runner 140 and the second end 150e of the movable-side arc runner 150, and extends upward due to buoyancy.
  • the arc A extends from the fixed side arc runner 140 and the movable side arc runner 150 into the arc extinguishing chamber 110 due to buoyancy, and the arc voltage increases, so that the short-circuit current in the circuit is limited and cut off.
  • FIG. 12 shows the distribution of magnetic force lines, the direction of the vertical component of the arc root, and the arc around the fixed side arc runner and the movable side arc runner when the direction of the arc current is opposite to that of the circuit breaker of FIG. It is a top view which shows the driving direction of.
  • the distribution of the magnetic force lines is indicated by a solid arrow, and the driving direction of the arc is indicated by an arrow M.
  • FIG. 12 illustrates the case where the arc current flows from the fixed contact 121 toward the movable contact 122.
  • the cathode side arc root Ac is driven in the diagonally upper left direction of FIG. 12, and the anode side arc root Aa is driven in the diagonally upper right direction of FIG.
  • the arc A is driven so as to wrap around the side surface 140s of the fixed side arc runner 140 and the side surface 150s of the movable side arc runner 150. That is, when the direction in which the arc current flows changes, the arc A is driven along the opposite side surfaces 140s and 150s.
  • the first magnetic field application unit 160 applies a magnetic field so that the magnetic flux passes from the first end portion 140e to the first proximity portion 140n of the fixed side arc runner 140.
  • the second magnetic field application unit 170 applies a magnetic field so that the magnetic flux passes from the second end portion 150e of the movable side arc runner 150 to the second proximity portion 150n.
  • the polarity closer to the fixed side arc runner 140 of the first magnet 161 and the polarity closer to the movable side arc runner 150 of the second magnet 171 are made the same.
  • the arc A can be driven along the side surfaces 140s and 150s on the virtual plane. As a result, the arc A can be stably extended.
  • the fixed side arc runner 140 becomes wider as it approaches the first end portion 140e from the first proximity portion 140n, and a gap between the pair of side wall plates 130 is formed. It has a narrowed tapered portion 140v.
  • the movable side arc runner 150 has a tapered portion 150v in which the width becomes wider and the gap between the pair of side wall plates 130 becomes narrower as the second proximity portion 150n approaches the second end portion 150e. ..
  • the arc collides with the edge 140c and the edge 150c while ensuring a space around the fixed contact 121 and the movable contact 122 so that the arc can move, and the arc is commutated to the fixed side arc runner 140 and the movable side arc runner 150. Can be made to.
  • the heat of the arc A is transferred to the first magnet through the fixed side arc runner 140 and the movable side arc runner 150. It can be made difficult to be transmitted to 161 and the second magnet 171. As a result, demagnetization of the first magnet 161 and the second magnet 171 can be suppressed, and a decrease in the electromagnetic force for driving the arc A can be suppressed.
  • gaps g1 and g2 are provided between the first magnet 161 and the first spacer 162 and between the second magnet 171 and the second spacer 172. As a result, it is possible to further suppress the heat transfer of the arc A to the first magnet 161 and the second magnet 171.
  • Embodiment 2 the circuit breaker according to the second embodiment will be described. Since the circuit breaker according to the second embodiment differs from the first embodiment only in the configuration of the first magnetic field application unit and the second magnetic field application unit, the description of other configurations will not be repeated.
  • FIG. 13 is a front view showing the configuration of the peripheral portion of the fixed side arc runner and the movable side arc runner included in the circuit breaker according to the second embodiment.
  • the first magnetic field application unit 160 further includes the first yoke 163.
  • the first yoke 163 is connected to the first magnet 161 and is made of a magnetic material.
  • the first yoke 163 is connected to the north pole of the first magnet 161.
  • the first yoke 163 is located below the first end 140e of the fixed-side arc runner 140.
  • the first magnet 161 is located on the side opposite to the first proximity portion 140n side with respect to the first end portion 140e, and is connected to the back surface 140b of the fixed side arc runner 140 via the first yoke 163.
  • the second magnetic field application unit 170 further includes a second yoke 173.
  • the second yoke 173 is connected to the second magnet 171 and is made of a magnetic material.
  • the second yoke 173 is connected to the north pole of the second magnet 171.
  • the second yoke 173 is located below the second end 150e of the movable arcrunner 150.
  • the second magnet 171 is located on the side opposite to the second proximity portion 150n side with respect to the second end portion 150e, and is connected to the back surface 150b of the movable side arc runner 150 via the second yoke 173.
  • the magnetic poles of the first magnet 161 and the second magnet 171 closer to the fixed side arc runner 140 and the movable side arc runner 150 are on the N pole side, but may be on the S pole side.
  • the first yoke 163 made of a magnetic material guides the magnetic flux of the first magnet 161 to the fixed side arc runner 140. Thereby, the first magnet 161 can be arranged at a position away from the lower side of the first end portion 140e on the side opposite to the first proximity portion 140n.
  • the second yoke 173 made of a magnetic material guides the magnetic flux of the second magnet 171 to the movable arc runner 150. Thereby, the second magnet 171 can be arranged at a position away from the lower side of the second end portion 150e on the side opposite to the second proximity portion 150n. That is, by providing the first yoke 163 and the second yoke 173, the degree of freedom in arranging the first magnet 161 and the second magnet 171 can be increased.
  • Embodiment 3 the circuit breaker according to the third embodiment will be described. Since the circuit breaker according to the third embodiment differs from the second embodiment only in the configuration of the first magnetic field application unit and the second magnetic field application unit, the description of other configurations will not be repeated.
  • FIG. 14 is a front view showing the peripheral portion of the fixed side arc runner and the movable side arc runner included in the circuit breaker according to the third embodiment.
  • the first magnetic field application unit 160 further includes the first auxiliary yoke 164.
  • the first auxiliary yoke 164 is connected to the side opposite to the side to which the first yoke 163 of the first magnet 161 is connected, and is made of a magnetic material.
  • the first auxiliary yoke 164 is connected to the S pole of the first magnet 161.
  • the upper end of the first auxiliary yoke 164 faces the first end 140e of the fixed-side arc runner 140 at a distance.
  • the second magnetic field application unit 170 further includes a second auxiliary yoke 174.
  • the second auxiliary yoke 174 is connected to the side opposite to the side to which the second yoke 173 of the second magnet 171 is connected, and is made of a magnetic material.
  • the second auxiliary yoke 174 is connected to the south pole of the second magnet 171.
  • the upper end of the second auxiliary yoke 174 faces the second end 150e of the movable arcrunner 150 at a distance.
  • the magnetic poles of the first magnet 161 and the second magnet 171 closer to the fixed side arc runner 140 and the movable side arc runner 150 are on the N pole side, but may be on the S pole side.
  • the magnetic flux of the first magnet 161 can be increased by providing the first auxiliary yoke 164 made of a magnetic material.
  • the magnetic flux of the second magnet 171 can be increased. Thereby, the electromagnetic force for driving the arc A can be increased.
  • Embodiment 4 the circuit breaker according to the fourth embodiment will be described. Since the circuit breaker according to the fourth embodiment differs from the third embodiment only in the configuration of the fixed side arc runner, the movable side arc runner, the first magnetic field application unit and the second magnetic field application unit, the description of other configurations will not be repeated.
  • FIG. 15 is a front view showing a peripheral portion of a fixed side arc runner and a movable side arc runner included in the circuit breaker according to the fourth embodiment.
  • the first yoke 163 connected to the first magnet 161 extends along the back surface 140b of the fixed-side arc runner 140 to the vicinity of the first proximity portion 140n.
  • the fixed-side arc runner 140 according to the present embodiment has the same shape as the other embodiments, but the material may be a magnetic material or a non-magnetic material.
  • the second yoke 173 connected to the second magnet 171 extends along the back surface 150b of the movable arcrunner 150 to the vicinity of the second proximity portion 150n.
  • the movable side arc runner 150 according to the present embodiment has the same shape as the other embodiments, but the material may be a magnetic material or a non-magnetic material.
  • the magnetic field of the first magnet 161 can be applied by the first yoke 163 so that the magnetic flux passes from the first end portion 140e to the first proximity portion 140n.
  • the magnetic field of the second magnet 171 can be applied by the yoke 173 so that the magnetic flux passes from the second end portion 150e to the second proximity portion 150n.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
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Abstract

Selon l'invention, une première partie d'application de champ magnétique (160) est positionnée au-dessous d'une première partie de bord (140e) et comprend un premier aimant (161). Une seconde partie d'application de champ magnétique (170) est positionnée au-dessous d'une seconde partie de bord (150e) et comprend un second aimant (171). La première partie d'application de champ magnétique (160) applique un champ magnétique de telle sorte qu'un flux magnétique passe de la première partie de bord (140e) à une première partie voisine (140n) d'un conducteur arqué côté fixe (140). La seconde partie d'application de champ magnétique (170) applique un champ magnétique de telle sorte qu'un flux magnétique passe de la seconde partie de bord (150e) à une seconde partie voisine (150n) d'un conducteur arqué côté mobile (150).
PCT/JP2020/015558 2020-04-06 2020-04-06 Disjoncteur WO2021205518A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002251934A (ja) * 2001-02-23 2002-09-06 Mitsubishi Electric Corp 開閉器
JP2012064584A (ja) * 2010-09-20 2012-03-29 Secheron Sa 電気機械式回路遮断器
JP2013140767A (ja) * 2011-12-07 2013-07-18 Mitsubishi Electric Corp 開閉器
JP2015130277A (ja) * 2014-01-08 2015-07-16 三菱電機株式会社 直流高速度遮断器
JP2017004769A (ja) * 2015-06-10 2017-01-05 富士電機株式会社 回路遮断器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002251933A (ja) * 2001-02-23 2002-09-06 Mitsubishi Electric Corp 開閉器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002251934A (ja) * 2001-02-23 2002-09-06 Mitsubishi Electric Corp 開閉器
JP2012064584A (ja) * 2010-09-20 2012-03-29 Secheron Sa 電気機械式回路遮断器
JP2013140767A (ja) * 2011-12-07 2013-07-18 Mitsubishi Electric Corp 開閉器
JP2015130277A (ja) * 2014-01-08 2015-07-16 三菱電機株式会社 直流高速度遮断器
JP2017004769A (ja) * 2015-06-10 2017-01-05 富士電機株式会社 回路遮断器

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