WO2022158155A1 - 回路遮断器、分電盤、及び、アーク走行板 - Google Patents
回路遮断器、分電盤、及び、アーク走行板 Download PDFInfo
- Publication number
- WO2022158155A1 WO2022158155A1 PCT/JP2021/045115 JP2021045115W WO2022158155A1 WO 2022158155 A1 WO2022158155 A1 WO 2022158155A1 JP 2021045115 W JP2021045115 W JP 2021045115W WO 2022158155 A1 WO2022158155 A1 WO 2022158155A1
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- WIPO (PCT)
- Prior art keywords
- arc
- circuit breaker
- plate
- arc running
- fixed
- Prior art date
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- 238000009826 distribution Methods 0.000 title claims description 17
- 238000003825 pressing Methods 0.000 claims description 14
- 238000002788 crimping Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 description 12
- 238000012986 modification Methods 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000007769 metal material Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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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
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- 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
- H01H73/48—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 both electrothermal and electromagnetic automatic release
- H01H73/50—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 both electrothermal and electromagnetic automatic release reset by lever
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- 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
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/36—Metal parts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/40—Wall-mounted casings; Parts thereof or accessories therefor
Definitions
- the present invention relates to arc running plates used in circuit breakers.
- Patent Literature 1 discloses a circuit breaker capable of suppressing an increase in the number of parts and regulating the position of a link member with respect to a handle.
- a circuit breaker such as the one described above is equipped with an arc-extinguishing device for extinguishing the arc that occurs when the circuit is interrupted.
- the present invention provides a circuit breaker or the like with improved arc breaking performance.
- a circuit breaker is a circuit breaker that turns on and off electrical connections between a load and a power supply, and includes an arc running plate, the arc running plate being connected to the electric circuit. a terminal portion; an arc running portion arranged opposite to an arc extinguishing grid that divides an arc generated when a contact portion provided in the electric circuit is opened; and a fixed portion fixed to the housing of the circuit breaker, wherein the width of the arc running portion is narrower than the width of the narrowest part of the fixed portion.
- a distribution board includes the circuit breaker and a housing that accommodates the circuit breaker.
- An arc running plate is an arc running plate used in a circuit breaker that turns on and off electrical connections between a load and a power supply, and is a terminal connected to an electric circuit in the circuit breaker.
- an arc running part arranged opposite to an arc-extinguishing grid that divides an arc generated when the contact part provided in the electric circuit is opened; and the terminal part and the arc running part are connected to each other to break the circuit. and a fixed portion fixed to the housing of the vessel, wherein the width of the arc running portion is narrower than the width of the narrowest portion of the fixed portion.
- FIG. 1 is an external perspective view of a circuit breaker according to an embodiment.
- FIG. 2 is a first diagram showing the internal structure of the circuit breaker according to the embodiment.
- FIG. 3 is a second diagram showing the internal structure of the circuit breaker according to the embodiment.
- FIG. 4 is a diagram showing the internal structure of the coil unit according to the embodiment.
- FIG. 5 is an external perspective view of an arc running plate according to the embodiment.
- FIG. 6 is a top view of the arc traveling plate according to the embodiment.
- 7 is an external perspective view of an arc running plate according to Modification 1.
- FIG. FIG. 8 is a first external perspective view of an arc traveling plate according to Modification 2.
- FIG. 9 is a second external perspective view of the arc traveling plate according to Modification 2.
- FIG. 10 is an external perspective view of the distribution board according to the embodiment.
- each figure is a schematic diagram and is not necessarily strictly illustrated. Moreover, in each figure, the same code
- coordinate axes may be shown in the drawings used for explanation in the following embodiments.
- the positive side in the Z-axis direction may be expressed as the upper side (upper side), and the negative side in the Z-axis direction may be expressed as the lower side (lower side).
- the X-axis direction and the Y-axis direction are directions orthogonal to each other on a plane perpendicular to the Z-axis direction.
- FIG. 1 is an external perspective view of a circuit breaker according to an embodiment.
- 2 and 3 are diagrams showing the internal structure of the circuit breaker according to the embodiment. 1 and 2 show the circuit breaker 10 when the contact portion 11 (shown in FIG. 3) is in the open state, and FIG. 3 shows the circuit breaker when the contact portion 11 is in the closed state. A vessel 10 is shown.
- the circuit breaker 10 is a device that is used in a distribution board, etc., and turns on and off electrical connections between loads and power sources.
- An end portion of an electric wire connected to a load is inserted into the insertion port 21 of the circuit breaker 10, and the end portion is electrically connected to a load-side terminal structure 30 provided in the insertion port 21. .
- the end of the electric wire connected to the power supply is inserted into the receptacle 22 located on the opposite side of the receptacle 21 , and the end is connected to the power supply side terminal structure 70 provided in the receptacle 22 . is electrically connected to
- the circuit breaker 10 mainly includes a housing 20, a load-side terminal structure 30, a coil unit 40, an opening/closing mechanism 50, a bimetal plate 60, a power-side terminal structure 70, and an arc extinguishing device 80. Each of these components will be specifically described below.
- the housing 20 accommodates the load-side terminal structure 30, the coil unit 40, the switching mechanism 50, the bimetal plate 60, the power-side terminal structure 70, and the arc extinguishing device 80.
- the housing 20 has a flat shape with the X-axis direction in the figure as the thickness direction, and the shape of the housing 20 viewed from the X-axis direction is convex.
- the housing 20 is made of, for example, an insulating resin material.
- the load-side terminal structure 30 is a so-called pillar terminal (screw type terminal) in which the end of the electric wire is pressed and fixed by turning the screw 33 .
- the load-side terminal structure 30 is attached near the receptacle 21 inside the housing 20 .
- the load-side terminal structure 30 includes a load-side terminal plate 31 , terminal fittings 32 and screws 33 .
- the load-side terminal plate 31 has one end (the end on the negative side in the Y-axis direction) positioned inside the rectangular tube-shaped terminal fitting 32 and the other end (the end on the positive side in the Y-axis direction) as a coil. It is a metal plate electrically connected to 41 .
- the terminal fitting 32 is a rectangular tubular structure having a tubular axis along the Y-axis direction, and is made of a metal material.
- the screw 33 is accommodated in the housing 20 with the screw tip screwed into the screw hole of the terminal fitting 32 .
- the end of the electric wire is inserted into the space between the terminal fitting 32 and the load-side terminal plate 31 .
- the terminal fitting 32 moves toward the head of the screw 33 and the space between the terminal fitting 32 and the load-side terminal plate 31 narrows.
- the end of the electric wire is clamped between the terminal fitting 32 and the load-side terminal plate 31 .
- FIG. 4 is a diagram showing the internal structure of the coil unit 40 (the structure inside the coil bobbin 42).
- the coil unit 40 specifically includes a coil 41 , a coil bobbin 42 , a fixed plunger 43 , a movable plunger 44 , a coil spring 45 , a pushing pin 46 and a yoke 47 .
- the coil 41 is an electric wire wound around the coil bobbin 42 so that the winding axis extends along the Y-axis direction. Coil 41 is used to sense the short circuit current of the load and power supply. One end of the coil 41 is electrically and structurally connected to the load-side terminal plate 31 , and the other end of the coil 41 is electrically and structurally connected to the body portion 47 a of the yoke 47 .
- the coil bobbin 42 is a cylindrical structure having a cylinder axis along the Y-axis direction, and is attached to the housing 20 .
- the fixed plunger 43 and the movable plunger 44 are located inside the coil bobbin 42 .
- the fixed plunger 43 is fixed on the positive side of the coil bobbin 42 in the Y-axis direction.
- the movable plunger 44 is positioned on the Y-axis direction minus side of the fixed plunger 43
- the coil spring 45 is positioned between the fixed plunger 43 and the movable plunger 44 .
- the movable plunger 44 can move inside the coil bobbin 42 along the Y-axis direction.
- the movable plunger 44 is normally positioned on the negative side in the Y-axis direction within the coil bobbin 42 by the elastic force of the coil spring 45 .
- the fixed plunger 43 and movable plunger 44 are made of a magnetic material.
- the pushing pin 46 is inserted into an opening provided in the fixed plunger 43 , has its negative end in the Y-axis direction fixed to the movable plunger 44 , and moves integrally with the movable plunger 44 .
- the pushing pin 46 and the movable plunger 44 are moved to the positive side in the Y-axis direction against the elastic force of the coil spring 45 by the electromagnetic force generated by the short-circuit current flowing through the coil 41, and the first arm 52a of the opening/closing mechanism 50 is moved. to the positive side in the Y-axis direction.
- the contact portion 11 is opened.
- the short-circuit current stops, and the elastic force of the coil spring 45 causes the movable plunger 44 and the pushing pin 46 to return to their original positions.
- the yoke 47 is a member that constitutes the fixed contact of the contact portion 11 and also functions as an arc traveling plate.
- the yoke 47 is made of a magnetic material.
- the yoke 47 includes a body portion 47a, an arc traveling portion 47b, and a connecting portion 47c.
- the body portion 47 a is located on the Z-axis direction negative side of the coil 41 and faces the coil 41 .
- the other end of the coil 41 is electrically connected to the body portion 47a.
- the arc running portion 47b is located on the negative side in the Z-axis direction relative to the main body portion 47a and faces the arc extinguishing grid 82.
- the arc running portion 47b is a portion where arc legs (arc starting points) are generated.
- the connecting portion 47c is located on the Y-axis direction plus side of the main body portion 47a and the arc running portion 47b, and connects the main body portion 47a and the arc running portion 47b.
- the connecting portion 47 c constitutes a fixed contact of the contact portion 11 .
- the opening/closing mechanism 50 has a handle 51, a first link 52, and a second link 53 that interlock with each other.
- the opening/closing mechanism 50 opens the contact portion 11 in response to an opening operation (OFF operation) of tilting the handle 51 to the negative side in the Y-axis direction.
- the opening/closing mechanism 50 closes the contact portion 11 in response to a closing operation (ON operation) of tilting the handle 51 toward the positive side in the Y-axis direction.
- the handle 51 is a part of the opening/closing mechanism 50 that is operated by the user, and is exposed to the outside of the housing 20 .
- the handle 51 is biased toward the negative side in the Y-axis direction by a torsion spring (not shown), and when the handle 51 is moved toward the positive side in the Y-axis direction against the biasing force of the torsion spring, the handle 51 is held.
- the handle 51 is made of, for example, an insulating resin material.
- the first link 52 is pushed by the first arm 52a pushed by the pushing pin 46 when a short-circuit current flows through the coil 41 as described above, and by the bimetal plate 60 when an overcurrent flows as described later. It has a second arm 52b. When the first arm 52a or the second arm 52b is pushed while the handle 51 is held at the ON position, the hold is released and the handle 51 returns to the OFF position due to the biasing force of the torsion spring. Then, the second link 53 moves and the contact portion 11 is opened.
- the second link 53 constitutes the movable contact of the contact portion 11 and interlocks with the handle 51 and the first link 52 . As described above, when the handle 51 is in the ON position, the second link 53 contacts the connecting portion 47c of the yoke 47, and the contact portion 11 is formed. The second link 53 is separated from the connecting portion 47c of the yoke 47 when the handle 51 is in the off position.
- the second link 53 is made of a metal material and electrically connected to the bimetal plate 60 by a braided copper wire 61 .
- the bimetal plate 60 opens the contact portion 11 by driving the opening/closing mechanism 50 when an overcurrent due to an overload is detected.
- the bimetal plate 60 is a long plate-like member and is formed by bonding metal plates made of different materials.
- the bimetal plate 60 is, for example, a direct heating type that is curved by self-heating, but may be an indirectly heating type that is curved by being heated by a heater.
- a braided copper wire 61 is connected to the center of the surface of the bimetal plate 60 on the negative side in the Y-axis direction, and the bimetal plate 60 is electrically connected to the second link 53 by the braided copper wire 61 .
- a braided copper wire 62 is connected to the end of the bimetal plate 60 in the negative direction of the Z axis, and the bimetal plate 60 is electrically connected to the power supply side terminal plate 71 by the braided copper wire 62 .
- An arc running plate 81 is connected to the end of the bimetal plate 60 in the negative Z-axis direction, and the bimetal plate 60 is also electrically connected to the arc running plate 81 .
- the power supply side terminal structure 70 is a so-called pillar terminal (screw type terminal) in which the end of the electric wire is pressed and fixed by turning the screw 73 .
- the power-side terminal structure 70 is attached near the receptacle 22 inside the housing 20 .
- the power supply side terminal structure 70 includes a power supply side terminal plate 71 , a terminal fitting 72 and a screw 73 .
- the power supply-side terminal plate 71 One end (the end on the positive side in the Y-axis direction) of the power supply-side terminal plate 71 is positioned inside a rectangular tube-shaped terminal fitting 72, and the other end (the end on the negative side in the Y-axis direction) is braided. It is a metal plate electrically connected to the bimetal plate 60 and the arc running plate 81 through the copper wire 62 .
- the power-side terminal plate 71 has a plate shape bent in an L shape.
- the terminal fitting 72 is a rectangular tubular structure having a tubular axis along the Y-axis direction, and is made of a metal material.
- the screw 73 is accommodated in the housing 20 with the screw tip screwed into the screw hole of the terminal fitting 72 .
- the arc-extinguishing device 80 extinguishes the arc generated when the contact portion 11 is opened by extending and dividing the arc.
- the arc extinguishing device 80 includes an arc running plate 81 and an arc extinguishing grid 82 . It may be considered that the arc extinguishing device 80 further includes the body portion 47a of the yoke 47 and the arc running portion 47b.
- the arc traveling plate 81 is formed by bending a long plate-like metal member (metal plate). Arc travel plate 81 is arranged along the bottom wall of housing 20 . The end of the arc traveling plate 81 on the positive side in the Y-axis direction is connected to the end of the bimetal plate 60 on the negative side in the Z-axis direction. An end portion of the arc traveling plate 81 on the negative side in the Y-axis direction faces the arc extinguishing grid 82 .
- the arc-extinguishing grid 82 includes a plurality of arc-extinguishing plates spaced apart in the Z-axis direction, and support portions for supporting the plurality of arc-extinguishing plates.
- a plurality of arc-extinguishing plates are formed of a metal material.
- the support portion is made of an insulating material.
- the housing 20 is provided with an exhaust port 23 for exhausting gas generated by the arc.
- the current generated by the arc weakened by the arc-extinguishing device 80 flows through the electric circuit in the circuit breaker 10 via the arc running portion 47b.
- FIG. 5 is an external perspective view of the arc travel plate 81
- FIG. 6 is a top view of the arc travel plate 81 (viewed from the positive side in the Z-axis direction).
- the bimetal plate 60, the braided copper wire 62, and the power supply side terminal plate 71 are also illustrated together.
- the arc traveling plate 81 is formed, for example, by bending a long flat plate (that is, a metal plate) made of a metal material such as a copper-plated steel plate.
- the arc traveling plate 81 includes a terminal portion 83 , a fixed portion 84 and an arc traveling portion 85 .
- the terminal portion 83 is a portion of the arc traveling plate 81 that is connected to the electric circuit inside the circuit breaker 10 .
- the electric circuit in the circuit breaker 10 is a current path from the power supply to the load, and specifically includes the power supply side terminal structure 70, the braided copper wire 62, the bimetal plate 60, the braided copper wire 61, the second link 53, It is composed of the yoke 47 , the coil 41 and the load side terminal structure 30 .
- the terminal portion 83 includes a first end portion 86 on the fixed portion 84 side and a second end portion 87 on the side opposite to the fixed portion 84, and the second end portion 87 constitutes the electrical path. It is connected to a bimetal plate 60 that connects
- a first end portion 86 of the terminal portion 83 is curved.
- the first end 86 is, in other words, bent.
- the position adjustment of the bimetal plate 60 is realized by elastically deforming the terminal portion 83 with the first end portion 86 as a starting point.
- the circuit breaker 10 includes a pressing structure 63 (shown in FIGS. 2 and 3) for pressing the second end portion 87 from the outside of the housing 20 (circuit breaker 10).
- the arc traveling plate 81 elastically deforms starting from the first end portion 86 .
- the pressing structure 63 is an adjusting screw structure, and the position in the Y-axis direction is changed by rotating the screw with a screwdriver inserted from the outside.
- the position of the bimetal plate 60 can be adjusted. That is, it is possible to adjust the current value when the contact portion 11 is opened by deformation of the bimetal plate 60 .
- the fixed portion 84 is a portion of the arc running plate 81 that connects the terminal portion 83 and the arc running portion 85 , is positioned between the terminal portion 83 and the arc running portion 85 , and is the most fixed portion of the arc running plate 81 .
- the width here means the width in the direction (X-axis direction) crossing the longitudinal direction (Y-axis direction) of the arc traveling plate 81 .
- the fixed portion 84 is fixed to the housing 20 by being inserted into a recess (groove) provided in the inner wall of the housing 20 . Note that the fixed portion 84 also has the same function as the arc running portion 85 .
- the arc running portion 85 is a portion of the arc running plate 81 where the leg of the arc (arc starting point) is generated, and is arranged to face the arc extinguishing grid 82 . As shown in FIG. 6 , the width W2 of the arc running portion 85 is narrower than the width W3 of the terminal portion 83 and the width W1 of the fixed portion 84 .
- the width W2 of the arc running portion 85 is narrow, the arc voltage can be increased by suppressing the spread of the arc (that is, by improving the running performance of the arc). If the arc voltage is increased, the arc interruptability is improved.
- a general arc running portion may be provided with a wide portion that is inserted into the housing 20, but the arc running portion 85 has a simple elongated plate shape without a wide portion. As a result, the cost of the arc traveling plate 81 is reduced.
- the width W2 of the arc running portion 85 is, for example, about 2 mm or more and 3 mm or less. By setting the thickness to 2 mm or more, the shape of the arc running portion 85 can be stabilized when the arc running plate 81 is manufactured. Further, according to the results of the inventors' intensive studies, it is believed that if the width of the arc running portion 85 is 3 mm or less, the effect of improving the arc interruptability can be reliably obtained.
- the width W1 of the fixed portion 84 and the width W2 of the arc traveling portion 85 are constant, but they do not have to be constant.
- the width of the portion where the width of the arc running portion 85 is maximum is configured to be narrower than the width of the portion where the width of the fixed portion 84 is minimum.
- FIG. 7 is an external perspective view of an arc running plate according to Modification 1. As shown in FIG.
- the arc traveling plate 81a As shown in FIG. 7, the arc traveling plate 81a according to Modification 1 is provided with a rib 88a at the bent portion 88. As shown in FIG. The arc traveling plate 81a differs from the arc traveling plate 81 only in this respect.
- the rib 88a is formed, for example, by rib processing that further recesses the bent portion 88 .
- the bent portion 88 can be reinforced by such a rib 88a.
- the arc can be concentrated on the portion of the rib 88a, and the spread of the arc can be further suppressed. That is, the arc interruptability is improved.
- FIG. 8 is an external perspective view of an arc running plate according to Modification 2.
- FIG. 9 is an external perspective view of an arc running plate according to Modification 2 in a state in which a member corresponding to the arc running portion is separated.
- the bimetal plate 60, the braided copper wire 62, and the power supply side terminal plate 71 are also illustrated together.
- the arc running plate 81b includes an arc running portion 85b. It is formed by being attached to the terminal portion 83 .
- the original wire material of the arc running portion 85b is, for example, a nickel-plated steel wire, but is not particularly limited.
- the diameter of the wire is, for example, about 1.6 mm.
- at least a part of the arc traveling portion 85b may be formed of a wire material, and a part of the arc traveling portion 85b may be a metal plate integrally formed with the terminal portion 83. good.
- the arc running portion 85b is crimped after the end of the original wire rod of the arc running portion 85b is inserted into the notch portion 84b (slit portion) provided in the fixed portion 84. formed by being
- the arc running portion 85b may be formed by welding the end of the original wire of the arc running portion 85b to the fixed portion 84.
- the fixed portion 84 is provided with the notch portion 84b. It doesn't have to be.
- the width of the arc traveling portion 85b is narrower than the width of the terminal portion 83 and the width of the portion 84 to be fixed.
- the width of the arc running portion 85b is narrow, the arc voltage can be increased by suppressing the spread of the arc. If the arc voltage is increased, the arc interruptability is improved.
- caulking is a relatively easy processing method, and the material cost of wire rods is relatively low. Therefore, according to the arc traveling plate 81b, it is possible to improve the arc breaking performance of the circuit breaker 10 at low cost.
- the present invention may be implemented as a distribution board that includes the circuit breaker 10 .
- FIG. 10 is an external perspective view of the distribution board according to the embodiment.
- the distribution board 100 includes a housing 101 and at least one circuit breaker 10 inside the housing 101 .
- the distribution board 100 may include a plurality of circuit breakers 10 .
- the circuit breaker 10 may be used as a branch breaker to turn on and off the load and power electrical connections in the branch circuit, or as a main breaker to turn on and off the load and power electrical connections in the main circuit. may be used as It should be noted that the circuit breaker 10 may be provided with any of the arc running plates described above.
- Such a distribution board 100 is useful as a distribution board with improved arc blocking properties.
- the circuit breaker 10 is a circuit breaker that turns on and off the electrical connection between the load and the power supply.
- the circuit breaker 10 includes an arc-extinguishing grid 82 that separates an arc generated when the contact portion 11 provided in the electric circuit in the circuit breaker 10 is opened, an arc traveling plate 81, the arc-extinguishing grid 82 and the arc traveling plate. and a housing 20 that accommodates 81 .
- the arc running plate 81 connects the terminal portion 83 connected to the electric circuit, the arc running portion 85 arranged opposite to the arc extinguishing grid 82 , the terminal portion 83 and the arc running portion 85 , and is fixed to the housing 20 . and a fixed portion 84 to be fixed.
- the width of the arc running portion 85 is narrower than the width of the narrowest portion of the fixed portion 84 .
- Such a circuit breaker 10 is useful as a circuit breaker 10 with improved arc breaking properties.
- the arc running portion 85 and the fixed portion 84 are integrally formed.
- the arc traveling plate 81 can be made from a single member by bending a metal plate.
- the circuit breaker 10 further includes a bimetal plate 60 connected to a second end portion 87 of the terminal portion 83 opposite to the fixed portion 84 and a pressure plate for pressing the second end portion 87 from the outside of the housing 20. and a pressing structure 63 .
- the posture of the bimetal plate 60 changes according to the degree of pressing by the pressing structure 63 .
- the arc traveling portion 85 has a bent portion 88, and the bent portion 88 is provided with ribs 88a.
- the bent portion 88 can be reinforced. Moreover, according to such a rib 88a, the arc can be concentrated on the portion of the rib 88a, and the spread of the arc can be further suppressed.
- At least a portion of the arc traveling portion 85b is formed of a wire rod.
- the arc traveling plate 81b can be realized by a wire rod.
- the arc running portion 85b is formed by crimping the wire to the fixed portion 84. As shown in FIG.
- the arc traveling plate 81b can be manufactured by crimping the wire to the fixed portion 84. As shown in FIG.
- the distribution board 100 also includes a circuit breaker 10 and a housing 101 that houses the circuit breaker 10 .
- Such a distribution board 100 is useful as a distribution board with improved arc blocking properties.
- the arc running plate 81 is an arc running plate used in the circuit breaker 10 for turning on and off the electrical connection of the load and power supply.
- the arc running plate 81 is composed of a terminal portion 83 connected to the electric circuit in the circuit breaker 10 and an arc extinguishing grid that separates the arc generated when the contact portion 11 provided in the electric circuit opens. and a fixed portion 84 that connects the terminal portion 83 and the arc running portion 85 and is fixed to the housing 20 of the circuit breaker 10 .
- the width of the arc running portion 85 is narrower than the width of the narrowest portion of the fixed portion 84 .
- Such an arc running plate 81 can improve the arc breaking performance of the circuit breaker 10 .
- the invention may be embodied as a method of manufacturing a circuit breaker, a distribution board, or an arc running plate.
- circuit breaker 11 contact portion 20, 101 housing 60 bimetal plate 63 pressing structure 81, 81a, 81b arc running plate 82 arc extinguishing grid 83 terminal portion 84 fixed portion 85, 85b arc running portion 86 first end portion 87 second Two end portion 88 Bent portion 88a Rib 100 Distribution board
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
[回路遮断器の構成]
以下、実施の形態に係る回路遮断器について説明する。図1は、実施の形態に係る回路遮断器の外観斜視図である。図2及び図3は、実施の形態に係る回路遮断器の内部構造を示す図である。図1及び図2は、接点部11(図3に図示)が開極状態であるときの回路遮断器10を示しており、図3は、接点部11が閉極状態であるときの回路遮断器10を示している。
次に、アーク走行板81の具体的構成について説明する。図5は、アーク走行板81の外観斜視図であり、図6は、アーク走行板81の上面図(Z軸方向プラス側から見た図)である。なお、図5では、バイメタル板60、編組銅線62、及び、電源側端子板71も合わせて図示されている。
アーク走行板81において、アーク走行部85には、被固定部84寄りの位置に曲がり部88が設けられる。曲がり部88には、リブが設けられてもよい。図7は、このような変形例1に係るアーク走行板の外観斜視図である。
アーク走行板81においては、端子部83、被固定部84、及び、アーク走行部85は、一体形成されるが、アーク走行部85は、端子部83及び被固定部84とは別体の部材が端子部83に取り付けられることで形成されてもよい。図8は、このような変形例2に係るアーク走行板の外観斜視図である。図9は、アーク走行部に相当する部材が分離された状態の、変形例2に係るアーク走行板の外観斜視図である。なお、図8では、バイメタル板60、編組銅線62、及び、電源側端子板71も合わせて図示されている。
本発明は、回路遮断器10を備える分電盤として実現されてもよい。図10は、実施の形態に係る分電盤の外観斜視図である。
以上説明したように、回路遮断器10は、負荷及び電源の電気的な接続をオン及びオフする回路遮断器である。回路遮断器10は、回路遮断器10内の電路に設けられた接点部11の開極時に発生するアークを分断する消弧グリッド82と、アーク走行板81と、消弧グリッド82及びアーク走行板81を収容する筐体20とを備える。アーク走行板81は、上記電路に接続される端子部83と、消弧グリッド82に対向配置されるアーク走行部85と、端子部83とアーク走行部85とを連結し、筐体20に固定される被固定部84とを備える。アーク走行部85の幅は、被固定部84のうち最も幅が狭い箇所の幅よりも狭い。
以上、実施の形態について説明したが、本発明は、上記実施の形態に限定されるものではない。
11 接点部
20、101 筐体
60 バイメタル板
63 押圧構造
81、81a、81b アーク走行板
82 消弧グリッド
83 端子部
84 被固定部
85、85b アーク走行部
86 第一端部
87 第二端部
88 曲がり部
88a リブ
100 分電盤
Claims (8)
- 負荷及び電源の電気的な接続をオン及びオフする回路遮断器であって、
アーク走行板を備え、
前記アーク走行板は、
前記電路に接続される端子部と、
前記電路に設けられた接点部の開極時に発生するアークを分断する消弧グリッドに対向配置されるアーク走行部と、
前記端子部と前記アーク走行部とを連結し、前記回路遮断器の筐体に固定される被固定部とを備え、
前記アーク走行部の幅は、前記被固定部のうち最も幅が狭い箇所の幅よりも狭い
回路遮断器。 - 前記アーク走行部の少なくとも一部は、線材によって形成されている
請求項1に記載の回路遮断器。 - 前記アーク走行部は、上記線材が前記被固定部にかしめられることによって形成されている
請求項2に記載の回路遮断器。 - 前記アーク走行部及び前記被固定部は、一体形成されている
請求項1に記載の回路遮断器。 - 前記アーク走行部は、曲がり部を有し、
前記曲がり部にはリブが設けられている
請求項4に記載の回路遮断器。 - 前記端子部の前記被固定部側の第一端部は、湾曲しており、
前記回路遮断器は、さらに、
前記端子部の前記被固定部と反対側の第二端部に接続されたバイメタル板と、
前記筐体の外部から前記第二端部を押圧するための押圧構造とを備え、
前記押圧構造の前記押圧の程度に応じて、前記バイメタル板の姿勢が変化する
請求項1~5のいずれか1項に記載の回路遮断器。 - 請求項1~6のいずれか1項に記載の回路遮断器と、
前記回路遮断器を収容する筐体とを備える
分電盤。 - 負荷及び電源の電気的な接続をオン及びオフする回路遮断器に用いられるアーク走行板であって、
前記回路遮断器内の電路に接続される端子部と、
前記電路に設けられた接点部の開極時に発生するアークを分断する消弧グリッドに対向配置されるアーク走行部と、
前記端子部と前記アーク走行部とを連結し、前記回路遮断器の筐体に固定される被固定部とを備え、
前記アーク走行部の幅は、前記被固定部のうち最も幅が狭い箇所の幅よりも狭い
アーク走行板。
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58131635A (ja) * | 1982-01-29 | 1983-08-05 | 松下電工株式会社 | リモ−トコントロ−ル式回路しや断器 |
JPS633020U (ja) * | 1986-06-25 | 1988-01-09 | ||
WO2014155442A1 (ja) * | 2013-03-27 | 2014-10-02 | パナソニック株式会社 | 回路遮断器 |
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CN105103259B (zh) | 2013-04-11 | 2017-04-26 | 松下知识产权经营株式会社 | 电路开闭器及电路断路器 |
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- 2021-12-08 JP JP2022577022A patent/JP7539497B2/ja active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS58131635A (ja) * | 1982-01-29 | 1983-08-05 | 松下電工株式会社 | リモ−トコントロ−ル式回路しや断器 |
JPS633020U (ja) * | 1986-06-25 | 1988-01-09 | ||
WO2014155442A1 (ja) * | 2013-03-27 | 2014-10-02 | パナソニック株式会社 | 回路遮断器 |
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