WO2016088561A1 - Dc high-speed circuit breaker - Google Patents

Dc high-speed circuit breaker Download PDF

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Publication number
WO2016088561A1
WO2016088561A1 PCT/JP2015/082521 JP2015082521W WO2016088561A1 WO 2016088561 A1 WO2016088561 A1 WO 2016088561A1 JP 2015082521 W JP2015082521 W JP 2015082521W WO 2016088561 A1 WO2016088561 A1 WO 2016088561A1
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WO
WIPO (PCT)
Prior art keywords
arc
circuit breaker
grid
main contact
gas flow
Prior art date
Application number
PCT/JP2015/082521
Other languages
French (fr)
Japanese (ja)
Inventor
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 AU2015356244A priority Critical patent/AU2015356244B2/en
Priority to EP15865768.4A priority patent/EP3229250B1/en
Priority to JP2016562377A priority patent/JP6203428B2/en
Publication of WO2016088561A1 publication Critical patent/WO2016088561A1/en

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    • 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
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H33/10—Metal parts
    • 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
    • H01H9/342—Venting arrangements for arc chutes
    • 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
    • H01H9/345—Mounting of arc chutes
    • 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
    • H01H9/362—Mounting of plates in arc chamber
    • 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
    • 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
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • the present invention relates to a DC high speed circuit breaker used as a protective circuit breaker for a railway substation, for example, and more particularly to an arc extinguishing chamber structure.
  • the DC high-speed circuit breaker as a protective circuit breaker for railway substations.
  • the DC high-speed circuit breaker is placed in the upper part of the arc extinguishing chamber by commutating the arc generated between the arc contacts at the time of current interruption to the arc runner placed above the arc contactor and running on the arc runner. It is forced to limit the fault current by generating an arc voltage higher than the power supply voltage by increasing the arc resistance due to arc extension and dropping the electrode by dividing the grid in a short time to the iron plate called grid. Therefore, it is necessary to create a zero current point and cut it off.
  • a very hot arc melts surrounding arc contacts and arc runners and generates highly conductive arc gas. Since the arc has a property of being easily short-circuited at a portion having high conductivity, when the arc gas stops or flows in between the main contacts, the arc guided to the grid causes re-ignition that is ignited again between the main contacts. When the re-ignition is performed, the arc voltage raised to the power supply voltage or more suddenly drops to near 100 V, so that the current limiting is interrupted and the interruption performance is deteriorated. In the worst case, the arc may be short-circuited between the contacts, which may result in failure of interruption.
  • the DC high-speed circuit breaker needs to have a performance capable of interrupting a small current.
  • the electromagnetic force for driving and extending the arc is low, and since the arc does not travel to the tip of the arc horn, it cannot be cut off unless the electromagnetic force is increased or the arc voltage is increased within a limited travel range. Therefore, the DC high speed circuit breaker needs to have a performance capable of interrupting a wide current range from a large current to a small current.
  • Patent Document 1 Japanese Utility Model Laid-Open No. 6-60944.
  • arc horn AH is mounted so enter the bottom of example extinguishing chamber AS for improving the breaking performance by controlling the arc gas
  • side plates 13 1, 13 2 of the arcing horn AH A through groove 17 is provided at a lower position, and a barrier insulating plate 18 is detachably provided through the through groove 17 so as to prevent the arc from being blown out downward to prevent an arc grounding to equipment below the arc extinguishing chamber AS.
  • the pressure between the arc horn AH and the insulating plate 18 is increased to improve the interruption performance.
  • the above-described conventional DC high speed circuit breaker needs to smoothly move the arc gas from the contact point to the grid and efficiently exhaust the gas from the opening at the upper part of the arc extinguishing chamber in order to reliably interrupt the accident current.
  • the cross-sectional area of the opening is increased to prevent the arc gas from flowing from the grid portion to the contact portion in the large current region. It is necessary to improve the amount of exhaust.
  • the conventional arc extinguishing chamber has a constant thickness from the lower part to the upper part, and if the grid is arranged, the cross-sectional area of the opening is reduced, which makes it difficult for the arc gas to flow to the upper part of the arc extinguishing chamber. .
  • the opening area of the upper part of the arc extinguishing chamber is small, there is a problem that the arc gas reenters from the grid part to the contact part and re-ignites in a large current region.
  • the arc voltage when reaching the grid part must be kept constant until breaking is completed.
  • Factors that determine the arc voltage include the number of grids and the arc length, and the arc voltage can be adjusted by the number of grids.
  • the present invention has been made to solve the above-described problems, and its purpose is to keep the arc voltage constant by preventing re-ignition between the contacts and bridging at the upper part of the arc extinguishing chamber.
  • the present invention provides a DC high-speed circuit breaker that can maintain a high breaking performance even from a large current to a small current.
  • a DC high speed circuit breaker according to the present invention is disposed in an arc extinguishing chamber in which an arc extinguishing space is formed, a fixed main contact disposed on the lower side of the arc extinguishing chamber, and on the lower side of the arc extinguishing chamber.
  • a DC high-speed circuit breaker comprising a movable main contact that is connected to and separated from the fixed main contact, wherein the arc extinguishing chamber is disposed so as to sandwich the fixed main contact and the movable main contact from both sides.
  • a first insulating side plate forming a first arc gas flow path for guiding arc gas generated at the fixed side main contact and the movable side main contact to the outside of the arc extinguishing chamber; and the fixed side main contact and the movable side main contact
  • a second arc gas flow passage disposed on the upper side and configured to have a width larger than a distance between the first insulating side plates, and communicated with the first arc gas flow passage and having a cross-sectional area larger than a cross-sectional area of the first arc gas flow passage;
  • a plurality of grids to be formed and the grid 2nd insulating side plate which is arrange
  • the arc-insulating chamber includes a first insulating side plate that forms a first arc gas flow passage that guides the arc gas generated at the fixed-side main contact and the movable-side main contact to the outside of the arc-extinguishing chamber, and
  • the first magnetic pole plate is disposed on the upper side of the fixed main contact and the movable main contact, is configured to have a width larger than the interval between the first insulating side plates, and communicates with the first arc gas flow passage.
  • a plurality of grids forming a second arc gas flow passage having a cross-sectional area larger than the cross-sectional area, and a third arc gas flow having a cross-sectional area larger than the cross-sectional area of the second arc gas flow passage communicating with the second arc gas flow passage on the upper side of the grid
  • the arc gas can easily flow to the upper part of the arc extinguishing chamber, the arc gas exhaust performance is improved, and the re-ignition between the contacts is performed. Can win, it is possible to obtain a high breaking performance.
  • 3A is a front sectional view of an arc extinguishing chamber and a sectional view taken along line AA showing the relationship between the flow of arc gas in the arc extinguishing chamber and the opening in the DC high-speed circuit breaker according to Embodiment 1 of the present invention; is there. It is a characteristic view which shows the relationship between the opening cross-sectional area of the opening part which is the ease of the arc gas flow of the arc-extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention, and the arc-extinguishing chamber position.
  • FIG. 1 is a side sectional view showing a contact closing state in a DC high-speed circuit breaker according to Embodiment 1 of the present invention.
  • FIG. 2 is a side sectional view showing a state in which the contact in the DC high-speed circuit breaker according to Embodiment 1 of the present invention is in a breaking operation.
  • the direct current high-speed circuit breaker 101 connects the upper conductor 103 disposed below the arc extinguishing chamber 102 in which the arc extinguishing space is formed and the lower conductor 104 disposed below the upper conductor 103 to the upper conductor 103 when current is applied.
  • the fixed-side main contact 105 made in contact with the movable-side main contact 107 connected to the mover 106 connected to the lower conductor 104, and the mover 106 causes current to flow through the upper conductor 103 and the lower conductor 104. ing.
  • the overcurrent detector 108 disposed on the lower conductor 104 detects and operates the overcurrent, and releases the latch 109 holding the mover 106 when the current is energized.
  • the movable element 106 rotates clockwise around the rotation shaft 110 to perform the opening operation.
  • the fixed-side main contact 105 and the movable-side main contact 107 are accommodated in the arc extinguishing chamber 102, and an arc contact that generates an arc K when interrupted is disposed above the fixed-side main contact 105 and the movable-side main contact 107.
  • the fixed-side arc contact 111 and the movable-side arc contact 112 are configured.
  • the fixed-side arc contact 111 and the movable-side arc contact 112 are opened after the opening of the fixed-side main contact 105 and the movable-side main contact 107 in the opening operation, so that the arc K is fixed. It prevents the main contact 105 and the movable main contact 107 from being melted and protects the fixed main contact 105 and the movable main contact 107.
  • An arc horn for commutating the generated arc K and guiding it to the upper part of the arc extinguishing chamber 102 is disposed above the fixed side arc contact 111 and the movable side arc contact 112.
  • the arc horn is a fixed side arc horn. 113 and the movable side arc horn 114 are comprised.
  • a plurality of grids 115a made of a thin plate-like magnetic material having magnetism for increasing the arc voltage and cutting off the current limit by extending the electrode drop voltage and the arc length are arranged.
  • An exhaust port 116 for exhausting arc gas to the outside of the arc extinguishing chamber 102 is provided on the upper side of the grid assembly 115 of 115a.
  • FIG. 3 is a perspective view showing an arc extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention.
  • FIG. 4 is a perspective view showing a flat grid and a U-shaped grid in the DC high-speed circuit breaker according to Embodiment 1 of the present invention.
  • FIG. 5 is a perspective view showing an insulating plate in the DC high-speed circuit breaker according to Embodiment 1 of the present invention.
  • FIG. 6 is the (a) front view and the (b) side view which show the insulation board, flat plate grid, and U-shaped grid in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention.
  • FIG. 7 is a perspective exploded view showing the upper part of the arc extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention.
  • FIG. 8 is an exploded perspective view showing a lower part of the arc extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention.
  • FIG. 9 is (a) front exploded view and (b) side exploded view which show the arc-extinguishing chamber lower part in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention.
  • the arc extinguishing chamber 102 is composed of three components. First, as shown in FIGS. 3, 8, and 9, the fixed-side main contact 105, the movable-side main contact 107, the fixed-side arc contact 111, and the movable-side arc contact 112 are arranged to be sandwiched from both sides.
  • the pair of first insulating side plates 123 form a first arc gas flow passage R1 that guides the arc gas generated at the fixed main contact 105 and the movable main contact 107 to the outside of the arc extinguishing chamber 102. Second, as shown in FIGS.
  • the second arc gas flow passage R2 is disposed and has a width larger than the interval between the first insulating side plates 123 and communicates with the first arc gas flow passage R1 and has a cross-sectional area larger than that of the first arc gas flow passage R1.
  • a flat grid 118 and a U-shaped grid 119 are a plurality of grids. As shown in FIGS.
  • the third one is arranged so as to sandwich the flat grid 118 and the U-shaped grid 119 constituting the grid from both sides, and above the flat grid 118 and the U-shaped grid 119 constituting the grid.
  • a third arc gas flow passage R3 having a cross-sectional area larger than the cross-sectional area of the second arc gas flow passage R2 is formed on the side, and is arranged with a width larger than the width between the first insulating side plates 123.
  • a pair of second insulating side plates 124, and the arc extinguishing chamber 102 is constituted by these three components.
  • the width between the second insulating side plates 124 is configured to be larger than the width between the first insulating side plates 123. For example, the width is about three times as shown in FIG.
  • a flat grid 118 provided with a V-shaped notch 117 in the arc extinguishing chamber 102 toward the fixed side arc contact 111 and the movable side arc contact 112, respectively, and A U-shaped grid 119 is arranged.
  • the flat grid 118 and the U-shaped grid 119 constitute a grid.
  • an insulating plate 120 is disposed on the side surface in the plate thickness direction of the flat grid 118 to prevent the arc K from jumping out of the flat grid 118, and on the side surface of the U-shaped grid 119. Insulating plate 120 and insulating plate 121 are arranged to prevent arc K from jumping out of U-shaped grid 119.
  • a spacing insulating plate 122 in which a grid made up of a flat grid 118 and a U-shaped grid 119 is arranged for each of a plurality of groups is extended above the flat grid 118 and the U-shaped grid 119. Arranged in a state.
  • the second insulating side plate 124 sandwiches the flat plate grid 118, the U-shaped grid 119, the insulating plate 120, the insulating plate 121, and the gap insulating plate 122 from both sides.
  • an elongated plate 125a is provided in an insulating plate 125 disposed inside the second insulating side plate 124, and a flat plate grid 118, a U-shaped grid 119 and an insulating plate 120, an insulating plate 121, a spacing insulating plate are provided in these grooves 125a.
  • 122 is fitted and fixed.
  • an arc extinguishing material 126 that improves the arc extinguishing performance by cooling the arc K at the time of interruption is disposed inside the first insulating side plate 123.
  • a first magnetic pole plate 127 arranged for improving electromagnetic force acting on the arc K is arranged inside the outer first insulating side plate 123 so as to be covered with insulating plates 128 and 129 that prevent the arc K from short-circuiting. Is arranged.
  • a second magnetic pole plate 130 arranged for improving the electromagnetic force acting on the arc K is arranged inside the second insulating side plate 124 and arranged so as to be covered with an insulating plate 131 that prevents the arc K from being short-circuited. Has been.
  • a first arc gas flow passage R1 is formed between the first insulating side plates 123 to guide the arc gas generated at the fixed main contact 105 and the movable main contact 107 to the outside of the arc extinguishing chamber 102, and the arc gas is indicated by an arrow K1. Flows through the first arc gas flow passage R1.
  • the arc gas flowing through the first arc gas flow path R1 as indicated by the arrow K1 is indicated by an arrow in the second arc gas flow path R2 having a cross-sectional area larger than the cross-sectional area of the first arc gas flow path R1 between the flat grid 118 and the U-shaped grid 119.
  • the arc gas that has circulated as indicated by K2 and that has circulated through the second arc gas flow path R2 has a third cross-sectional area that is larger than the cross-sectional area of the second arc gas flow path R2 above the flat grid 118 and the U-shaped grid 119. It flows through the arc gas flow passage R3 as indicated by an arrow K3.
  • the arc gas flowing through the third arc gas flow passage R3 is led out of the arc extinguishing chamber 102 from the exhaust port 116, which is an opening between the first insulating side plates 123, as indicated by an arrow K4.
  • the position DC, the position A, and the position C in the arc extinguishing chamber 102 are configured in the relationship of position A> position A> position U.
  • the width of the insulating plate 32 provided with the magnetic pole plate 33 on the outer side surface is the same from the fixed main contact and the movable main contact to the grid tip.
  • the characteristic due to the relationship between the two is as shown in FIG.
  • the arc gas can flow more easily than the conventional one, and the arc gas exhaust performance is improved and the contact point is increased. Re-pointing between Suppressed, it is possible to obtain high interruption performance.
  • a first magnetic pole plate 127 is disposed inside the first insulating side plate 123 to improve the electromagnetic force acting on the arc K
  • a second magnetic pole is arranged inside the second insulating side plate 124 to improve the electromagnetic force acting on the arc K.
  • FIG. 12 is a front view of a main part showing the relationship between arc discharge and arc voltage in the grid arrangement part of the arc extinguishing chamber in the DC high speed circuit breaker according to Embodiment 2 of the present invention.
  • the middle portion becomes a space 132.
  • a V-shaped notch 117 is provided at the center of the bottom of the U-shaped grid 119, and the arc gas can be blown through the intermediate space 132.
  • the distance between the flat grid 118 and the U-shaped grid 119 that arc discharge that is, the arc length 133 and the electrode drop. Since the number of the flat grid 118 and the U-shaped grid 119 can be adjusted, an arbitrary arc voltage can be generated.
  • the second embodiment it is possible to generate an arbitrary arc voltage by using a combination of the flat grid 118 and the U-shaped grid 119 as the grid.
  • FIG. 13 is a front view which shows the ease of the arc of the arc extinguishing chamber in the direct-current high-speed circuit breaker concerning Embodiment 3 of this invention.
  • the region where the arc tends to stay is in the vicinity of the contact portion such as the fixed side main contact 105, the movable side main contact 107, the fixed side arc contact 111 and the movable side arc contact 112.
  • the contact portion such as the fixed side main contact 105, the movable side main contact 107, the fixed side arc contact 111 and the movable side arc contact 112.
  • a grid arrangement portion 137 such as a flat grid 118 and a U-shaped grid 119
  • an arc extinguishing chamber upper portion 138 above the flat grid 118 and the U-shaped grid 119 are examples of the contact portion 136.
  • the arc gas which is one of the factors for the ease of discharge, passes through the space 132 in the middle portion of the U-grid 119 via the V-shaped notch 117 and is exhausted from the exhaust port 116 at the top of the arc extinguishing chamber 102. Therefore, the exhaust performance is the same as when the flat grid 118 is arranged.
  • the width and the number ratio of the bottom of the U-shaped grid 119 it is possible to make the grid spacing easy to discharge arcs. Therefore, by using the U-shaped grid 119, it is possible to improve the easiness of staying of the arc in the grid arrangement portion 137 while maintaining the same ease of discharging the arc gas in the vicinity of the contact portion 136.
  • the arc is stably maintained in the grid arrangement part 137 and is a constant arc voltage that is higher and stable than the power supply voltage required for interruption. Can be maintained.
  • the grid interval and arc length are shortened, the arc is most likely to stay at the grid placement portion 137, and a stable arc voltage can be maintained until the interruption is completed.
  • FIG. 14 is a front view showing the arrangement of arcs, flat grids, and U-shaped grids when the arc extinguishing chamber is at a small current in a DC high-speed circuit breaker according to Embodiment 4 of the present invention.
  • FIG. 15 is a characteristic diagram showing the electromagnetic force received by the arc of the arc extinguishing chamber from the arc horn as the conducting conductor in the DC high-speed circuit breaker according to Embodiment 4 of the present invention.
  • FIG. 16 is a characteristic view which shows the electromagnetic force which acts on the arc of the arc-extinguishing chamber in the direct current
  • the flat grid 118 and the U-shaped grid 119 of the arc extinguishing chamber 102 according to the fourth embodiment of the present invention are arranged such that the flat grid 118 is arranged on the center side 139 and the U-shaped grid 119 is arranged on both sides 140. Configured.
  • the electromagnetic force received by the arc receives magnetic flux G from the fixed-side arc horn 113 and the movable-side arc horn 114, which are arc horns that are current-carrying conductors through which the current I flows, and is generated in accordance with the Fleming left-hand rule.
  • the electromagnetic force 144 generated by the balance between the force 142 and the pinch force 143 acting in the arc center direction by the magnetic material as shown in FIG. 16 becomes a magnetic flux 145 having a weak magnetic flux region G1 and a strong magnetic flux region G2.
  • the arc cannot travel to the front end portions 141a and 141b of the fixed side arc horn 113 and the movable side arc horn 114 which are arc horns because the electromagnetic force 142 received from the conducting conductor is small. Therefore, only a limited range, that is, the grid on the center side can be used. However, in order to cut off the direct current, it is necessary to generate an arc voltage higher than the power supply voltage.
  • the flat grid 118 is arranged on the central side 139 and the U-shaped grid 119 is arranged on both sides 140, so that a large number of electrodes can be obtained even in the arc traveling range with a small current.
  • the arc voltage can be increased by the drop, and a high small current interruption performance can be obtained.
  • FIG. Embodiment 5 of the present invention will be described with reference to FIG. FIG. 17A is a front view and FIG. 17B is a side view showing the effect of a magnetic pole plate in a DC high-speed circuit breaker according to Embodiment 5 of the present invention.
  • the first magnetic pole plate 127 when the first magnetic pole plate 127 is arranged on the first insulating side plate 123 of the arc extinguishing chamber 102, the magnetic flux 145 generated by the arc passes through the first magnetic pole plate 127.
  • the magnetic flux 145 passes through the air.
  • the magnetic resistance of the magnetic material of the first magnetic pole plate 127 is smaller than that of air, so the loss of the magnetic flux 145 is reduced and the electromagnetic force 144 is increased. Therefore, the first magnetic pole plate 127 has an effect of improving the electromagnetic force 144 generated by the arc itself, and is particularly effective in a small current interruption with a small electromagnetic force 142.
  • the magnetic pole plate 33 is arranged so as to be exposed outside the insulating plate 32 of the arc extinguishing chamber 31. In some cases, the arc could be short-circuited through the magnetic pole plate 33 and failed to be interrupted. Therefore, in the fifth embodiment, as shown in FIG. 8, the first magnetic pole plate 127 is disposed inside the first insulating side plate 123 of the arc extinguishing chamber 102, and the second magnetic pole plate 130 is arranged in the arc extinguishing chamber 102. Arranged inside the second insulating side plate 124 and covered and fixed with an insulator, the arc is not directly touched and cannot be electrically connected.
  • the arc extinguishing chamber 102 is divided into a first magnetic pole plate 127 and a second magnetic pole plate 130 because the width dimension is different between the lower portion on the first insulating side plate 123 side and the upper portion on the second insulating side plate 124 side.
  • the first magnetic pole plate 127 is disposed inside the first insulating side plate 123 and the second magnetic pole plate 130 is disposed inside the second insulating side plate 124.
  • the first magnetic pole plate 127 is replaced with the insulating plate 128. Since the second magnetic pole plate 130 is covered with the insulating plate 131, the arc is not directly touched.
  • the arc or arc gas does not contact the first magnetic pole plate 127 and the second magnetic pole plate 130 without impairing the effect of the magnetic pole plate that improves the electromagnetic force acting on the arc. It is possible to prevent a short circuit and a failure of interruption through the first magnetic pole plate 127 and the second magnetic pole plate 130, and it is possible to reliably cut off from a small current to a large current.
  • FIG. 18A is a front view
  • FIG. 18B is a side view showing a U-shaped grid in a DC high-speed circuit breaker according to Embodiment 6 of the present invention.
  • the function of the U-shaped grid 119 can be satisfied if two opposing flat grids 118 are electrically connected and current can be passed. Therefore, it is also possible to connect using bolts 146, nuts 147 or rivets, or by welding 148.
  • FIG. 19A is a front view
  • FIG. 19B is a side view showing a magnetic pole plate in a DC high-speed circuit breaker according to Embodiment 6 of the present invention.
  • the first magnetic pole plate 127 and the second magnetic pole plate 130 are not a single plate, but the thin magnetic pole plates 149a and 149b are in close contact with each other to form the aggregates 150a and 150b.
  • the functions of the magnetic pole plate 127 and the second magnetic pole plate 130 can be satisfied.
  • the present invention facilitates the flow of arc gas to the upper part of the arc extinguishing chamber, improves the exhaust performance of the arc gas, can suppress re-ignition between the contacts, and can achieve high interruption performance. It is suitable for realization of a vessel.

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

Abstract

This invention provides a DC high-speed circuit breaker that can achieve high breaking performance from large currents to small currents. An arc-extinguishing chamber is formed of: first insulating side plates disposed so as to flank a fixed-side main contact and a movable-side main contact from both sides and forming a first arc-gas flow passage that leads arc-gas generated at the fixed-side main contact and the movable-side main contact to the outside of the arc-extinguishing chamber; a plurality of grids disposed on the upper side of the fixed-side main contact and the movable-side main contact and forming a second arc-gas flow passage that is configured to have a larger width than the width between the first insulating side plates, that communicates with a first arc-gas flow passage, and that has a larger cross-sectional area than the cross-sectional area of the first arc-gas flow passage; and second insulating side plates disposed so as to flank the grids from both sides and forming, on the upper side of the grids, a third arc-gas flow passage that communicates with the second arc-gas flow passage and has a larger cross-sectional area than the cross-sectional area of the second arc-gas flow passage.

Description

直流高速度遮断器DC high speed circuit breaker
　この発明は、例えば電鉄変電所用の保護遮断器などとして使用される直流高速度遮断器に関し、特に消弧室構造に関するものである。 The present invention relates to a DC high speed circuit breaker used as a protective circuit breaker for a railway substation, for example, and more particularly to an arc extinguishing chamber structure.
　電鉄変電所用の保護遮断器として、直流高速度遮断器がある。直流高速度遮断器は、電流遮断時においてアーク接触子間に発生したアークをアーク接触子上部に配置されたアークランナーへと転流させ、アークランナー上を走行させることで消弧室上部に配置されたグリッドとよばれる鉄板まで短時間で導き留め、アーク伸長によるアーク抵抗の増大とグリッドで分割させることによる電極降下によって電源電圧よりも高いアーク電圧を発生させ事故電流を限流することで強制的に電流０点を作り出し遮断する必要がある。 There is a DC high-speed circuit breaker as a protective circuit breaker for railway substations. The DC high-speed circuit breaker is placed in the upper part of the arc extinguishing chamber by commutating the arc generated between the arc contacts at the time of current interruption to the arc runner placed above the arc contactor and running on the arc runner. It is forced to limit the fault current by generating an arc voltage higher than the power supply voltage by increasing the arc resistance due to arc extension and dropping the electrode by dividing the grid in a short time to the iron plate called grid. Therefore, it is necessary to create a zero current point and cut it off.
　一方で、非常に高温なアークは周辺のアーク接触子やアークランナーを溶かし、導電性の高いアークガスを発生させる。アークは導電性の高い箇所で短絡し易い性質があるため、主接点間でアークガスが停留または流入すると、グリッドまで導かれたアークが主接点間で再び発弧する再点弧を引き起こしてしまう。再点弧すると電源電圧以上に高められたアーク電圧が１００Ｖ付近まで急落してしまうため限流が中断されてしまい遮断性能が低下してしまう。また最悪の場合、接点間でアークが短絡し続け遮断失敗に至る怖れがある。そのため、アークをグリッドまで短時間で導き確実に遮断するためにはアークガスを接点からグリッドまでスムーズに移動させ消弧室上部の開口部から効率良く排気させグリッドでアークを留めておく必要がある。 On the other hand, a very hot arc melts surrounding arc contacts and arc runners and generates highly conductive arc gas. Since the arc has a property of being easily short-circuited at a portion having high conductivity, when the arc gas stops or flows in between the main contacts, the arc guided to the grid causes re-ignition that is ignited again between the main contacts. When the re-ignition is performed, the arc voltage raised to the power supply voltage or more suddenly drops to near 100 V, so that the current limiting is interrupted and the interruption performance is deteriorated. In the worst case, the arc may be short-circuited between the contacts, which may result in failure of interruption. For this reason, in order to guide the arc to the grid in a short time and reliably shut off the arc, it is necessary to smoothly move the arc gas from the contact point to the grid, efficiently exhaust the gas from the opening in the upper part of the arc extinguishing chamber, and keep the arc at the grid.
　また、直流高速度遮断器は小電流の電流を遮断できる性能を有している必要がある。しかし、小電流領域ではアークを駆動させ伸長させるための電磁力が低く、アークがアークホーン先端まで走行しないため電磁力を高める、もしくは限られた走行範囲でアーク電圧を上昇させなければ遮断できない。そのため、直流高速度遮断器は大電流から小電流まで広い電流領域を遮断できる性能を有している必要がある。 Also, the DC high-speed circuit breaker needs to have a performance capable of interrupting a small current. However, in the small current region, the electromagnetic force for driving and extending the arc is low, and since the arc does not travel to the tip of the arc horn, it cannot be cut off unless the electromagnetic force is increased or the arc voltage is increased within a limited travel range. Therefore, the DC high speed circuit breaker needs to have a performance capable of interrupting a wide current range from a large current to a small current.
　従来の直流高速度遮断器としては、例えば特許文献１（実開平６－６０９４４号公報）に開示された構造がある。図２２に示すように、アークガスを制御し遮断性能を向上させるため例えば消弧室ＡＳの下部にアークホーンＡＨが入るように取り付けられる消弧室ＡＳにおいて、側板１３１、１３２のアークホーンＡＨより低い位置に貫通溝１７を設け、該貫通溝１７を通してバリヤ用絶縁板１８を着脱自在に設け、アークの下方への吹き出しを防げて消弧室ＡＳ下方の機器へのアークの地絡を防止すると共に、アークホーンＡＨと絶縁板１８間の圧力を高めて遮断性能を向上させる。 As a conventional DC high speed circuit breaker, for example, there is a structure disclosed in Patent Document 1 (Japanese Utility Model Laid-Open No. 6-60944). As shown in FIG. 22, in the arcing chamber AS arc horn AH is mounted so enter the bottom of example extinguishing chamber AS for improving the breaking performance by controlling the arc gas, side plates 13 1, 13 2 of the arcing horn AH A through groove 17 is provided at a lower position, and a barrier insulating plate 18 is detachably provided through the through groove 17 so as to prevent the arc from being blown out downward to prevent an arc grounding to equipment below the arc extinguishing chamber AS. At the same time, the pressure between the arc horn AH and the insulating plate 18 is increased to improve the interruption performance.
実開平６－６０９４４号公報Japanese Utility Model Publication No. 6-60944
　上述した従来の直流高速度遮断器は、事故電流を確実に遮断するためには、アークガスを接点からグリッドまでスムーズに移動させ、消弧室上部の開口部から効率良く排気する必要がある。アークガスを接点からグリッドまで効率的に消弧室上部方向へ流れやすくするためには、アークガスの通り道となる開口部の断面積を、消弧室上部に向かうにつれ拡大させる必要がある。 The above-described conventional DC high speed circuit breaker needs to smoothly move the arc gas from the contact point to the grid and efficiently exhaust the gas from the opening at the upper part of the arc extinguishing chamber in order to reliably interrupt the accident current. In order to make the arc gas easily flow from the contact point to the grid toward the upper part of the arc extinguishing chamber, it is necessary to enlarge the cross-sectional area of the opening serving as the passage of the arc gas as it goes toward the upper part of the arc extinguishing chamber.
　また、電流が大きくなるとアークガスの発生量も多くなるため、大電流領域ではグリッド部から接点部へのアークガスの流入を防ぐためにも開口部の断面積を大きくし、消弧室上部の開口部からの排気量を向上させる必要がある。 In addition, since the amount of arc gas generated increases as the current increases, the cross-sectional area of the opening is increased to prevent the arc gas from flowing from the grid portion to the contact portion in the large current region. It is necessary to improve the amount of exhaust.
　しかしながら、従来の消弧室は下部から上部まで厚さが一定であり、グリッドを配置すると開口部の断面積を減少させてしまうため、アークガスが消弧室上部へと流れにくくなってしまっていた。また、消弧室上部の開口面積も小さいため大電流領域ではアークガスがグリッド部から接点部へ逆入し再点弧してしまう問題点があった。 However, the conventional arc extinguishing chamber has a constant thickness from the lower part to the upper part, and if the grid is arranged, the cross-sectional area of the opening is reduced, which makes it difficult for the arc gas to flow to the upper part of the arc extinguishing chamber. . In addition, since the opening area of the upper part of the arc extinguishing chamber is small, there is a problem that the arc gas reenters from the grid part to the contact part and re-ignites in a large current region.
　また、直流高速度遮断器において、高遮断性能を得るためにはグリッド部に到達した際のアーク電圧を遮断が完了するまで一定に維持しなければならない。アーク電圧を決める要素としてはグリッド枚数とアーク長があり、グリッドの枚数によりアーク電圧を調整することが可能である。 Also, in DC high-speed circuit breakers, in order to obtain high breaking performance, the arc voltage when reaching the grid part must be kept constant until breaking is completed. Factors that determine the arc voltage include the number of grids and the arc length, and the arc voltage can be adjusted by the number of grids.
　しかし、グリッドの枚数を減らすと隣接するグリッドの間隔が長くなってしまう。アーク放電のし易さは放電する対象物との距離が短いほど放電しやすく、長いほど放電しにくくなる。そのため、グリッド間隔が長くなるとグリッド間で放電しにくくなり、絶縁距離が短い接点部で再点弧してしまう。もしくは、消弧室上部には消弧室から排気した導電性の高いアークガス存在しているため、このアークガスを介してアークが消弧室上部で短絡してしまう橋絡現象を引き起こす可能性がある。橋絡現象が起こると、アーク電圧を一定に維持できないだけでなく、遮断に必要となるアーク電圧を確保できず遮断失敗してしまう場合がある。そのため、アークをグリッド配置部で留めておくためには、グリッド間が最もアーク放電しやすい状態とすることが重要である。 However, if the number of grids is reduced, the interval between adjacent grids becomes longer. As for the ease of arc discharge, the shorter the distance to the object to be discharged, the easier it is to discharge, and the longer it is, the more difficult it is to discharge. Therefore, when the grid interval is long, it becomes difficult to discharge between the grids, and re-ignition occurs at the contact portion having a short insulation distance. Or, since there is a highly conductive arc gas exhausted from the arc extinguishing chamber in the upper part of the arc extinguishing chamber, this arc gas may cause a bridging phenomenon in which the arc is short-circuited in the upper part of the arc extinguishing chamber. . When the bridging phenomenon occurs, not only the arc voltage cannot be maintained constant, but also the arc voltage necessary for interruption cannot be secured and interruption may fail. For this reason, in order to keep the arc at the grid placement part, it is important to make the arc discharge most easily between the grids.
　一方で、グリッド間を短くするとグリッドの枚数が多くなりアーク電圧が規格値よりも高くなるため任意のアーク電圧かつ安定維持という２つの条件を達成することが困難となる問題点があった。 On the other hand, if the distance between the grids is shortened, the number of grids increases, and the arc voltage becomes higher than the standard value, which makes it difficult to achieve two conditions of arbitrary arc voltage and stable maintenance.
　このようにアークをアークホーン上を走行させグリッドにアーク分割させてアーク電圧を高め限流遮断する方式の場合、大電流領域ではアークを走行させるローレンツ力が大きいため、アークをアークホーンの先端まで走行させ配置した全てのグリッドで分割させることができる。しかし、小電流の場合、アークを走行させるための電磁力が小さいため、アークがアークホーン先端まで走行できず全てのグリッドで分割させることができない問題があった。 In this way, when the arc travels on the arc horn and the arc is divided into grids to increase the arc voltage and cut off the current limit, the Lorentz force that causes the arc to travel in a large current region is large, so the arc can reach the tip of the arc horn. It can be divided by all the grids that are run and arranged. However, in the case of a small current, since the electromagnetic force for running the arc is small, there is a problem that the arc cannot run to the tip of the arc horn and cannot be divided by all grids.
　また、小電流ではアークに働く電磁力が小さいため、アークがアークホーン先端まで走行することができず、アークを広げ伸長させ電源電圧までアーク電圧を上昇させることが困難であるため遮断失敗することがある。そのため、電磁力を向上させるため、消弧室側面に磁極板を配置し小電流遮断の性能を向上させる必要がある。 Also, since the electromagnetic force acting on the arc is small at a small current, the arc cannot travel to the tip of the arc horn, and it is difficult to widen and extend the arc to raise the arc voltage to the power supply voltage, thus failing to cut off. There is. Therefore, in order to improve electromagnetic force, it is necessary to arrange a magnetic pole plate on the side of the arc extinguishing chamber to improve the performance of small current interruption.
　しかし、消弧室の側面に磁極板を配置すると大電流遮断時に、一部のアークガスが消弧室外の方向に吹き出し、アークガスを介してアークが磁極板で短絡してしまい遮断失敗する場合があった。 However, if a pole plate is placed on the side of the arc-extinguishing chamber, when a large current is interrupted, some arc gas blows out to the outside of the arc-extinguishing chamber, and the arc may be short-circuited by the pole plate via the arc gas, resulting in failure to interrupt. It was.
　この発明は、上記のような課題を解決するためになされたものであり、その目的は、接点間での再点弧や消弧室上部での橋絡を防止することでアーク電圧を一定に維持し、大電流から小電流においても高い遮断性能を得ることができる直流高速度遮断器を提供するものである。 The present invention has been made to solve the above-described problems, and its purpose is to keep the arc voltage constant by preventing re-ignition between the contacts and bridging at the upper part of the arc extinguishing chamber. The present invention provides a DC high-speed circuit breaker that can maintain a high breaking performance even from a large current to a small current.
　この発明に係わる直流高速度遮断器は、消弧空間が形成される消弧室と、前記消弧室の下方側に配置された固定側主接点と、前記消弧室の下方側に配置され前記固定側主接点と接離される可動側主接点とを備えた直流高速度遮断器であって、前記消弧室は、前記固定側主接点、前記可動側主接点を両側から挟むように配置され、前記固定側主接点および前記可動側主接点で発生するアークガスを前記消弧室外に導く第１アークガス流通路を形成する第１絶縁側板と、前記固定側主接点および前記可動側主接点の上方側に配置され、前記第１絶縁側板間の間隔より大きい幅に構成され、前記第１アークガス流通路と連通し前記第１アークガス流通路の断面積より大きい断面積の第２アークガス流通路を形成する複数のグリッドと、前記グリッドを両側から挟むように配置され、前記グリッドの上方側に前記第２アークガス流通路と連通し前記第２アークガス流通路の断面積より大きい断面積の第３アークガス流通路を形成する第２絶縁側板とにより構成されたものである。 A DC high speed circuit breaker according to the present invention is disposed in an arc extinguishing chamber in which an arc extinguishing space is formed, a fixed main contact disposed on the lower side of the arc extinguishing chamber, and on the lower side of the arc extinguishing chamber. A DC high-speed circuit breaker comprising a movable main contact that is connected to and separated from the fixed main contact, wherein the arc extinguishing chamber is disposed so as to sandwich the fixed main contact and the movable main contact from both sides. A first insulating side plate forming a first arc gas flow path for guiding arc gas generated at the fixed side main contact and the movable side main contact to the outside of the arc extinguishing chamber; and the fixed side main contact and the movable side main contact A second arc gas flow passage disposed on the upper side and configured to have a width larger than a distance between the first insulating side plates, and communicated with the first arc gas flow passage and having a cross-sectional area larger than a cross-sectional area of the first arc gas flow passage; A plurality of grids to be formed and the grid 2nd insulating side plate which is arrange | positioned so that it may be pinched | interposed from both sides, and may form the 3rd arc gas flow path larger than the cross-sectional area of the said 2nd arc gas flow path in communication with the said 2nd arc gas flow path above the said grid It is comprised by.
　この発明に係わる直流高速度遮断器によれば、消弧室を、固定側主接点および可動側主接点で発生するアークガスを消弧室外に導く第１アークガス流通路を形成する第１絶縁側板および第１磁極板と、固定側主接点および可動側主接点の上方側に配置され、第１絶縁側板間の間隔より大きい幅に構成され、第１アークガス流通路と連通し第１アークガス流通路の断面積より大きい断面積の第２アークガス流通路を形成する複数のグリッドと、グリッドの上方側に第２アークガス流通路と連通し第２アークガス流通路の断面積より大きい断面積の第３アークガス流通路を形成する第２絶縁側板および第２磁極板とにより構成したことにより、アークガスが消弧室の上部へと流れやすくし、アークガスの排気性能を向上させ接点間での再点弧を抑制することができ、高い遮断性能を得ることができる。 According to the DC high-speed circuit breaker according to the present invention, the arc-insulating chamber includes a first insulating side plate that forms a first arc gas flow passage that guides the arc gas generated at the fixed-side main contact and the movable-side main contact to the outside of the arc-extinguishing chamber, and The first magnetic pole plate is disposed on the upper side of the fixed main contact and the movable main contact, is configured to have a width larger than the interval between the first insulating side plates, and communicates with the first arc gas flow passage. A plurality of grids forming a second arc gas flow passage having a cross-sectional area larger than the cross-sectional area, and a third arc gas flow having a cross-sectional area larger than the cross-sectional area of the second arc gas flow passage communicating with the second arc gas flow passage on the upper side of the grid By comprising the second insulating side plate and the second magnetic pole plate forming the path, the arc gas can easily flow to the upper part of the arc extinguishing chamber, the arc gas exhaust performance is improved, and the re-ignition between the contacts is performed. Can win, it is possible to obtain a high breaking performance.
この発明の実施の形態１に係わる直流高速度遮断器における接点閉合状態を示す側断面図である。It is a sectional side view which shows the contact closed state in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention. この発明の実施の形態１に係わる直流高速度遮断器における接点が開離動作中の状態を示す側断面図である。It is a sectional side view which shows the state in which the contact in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention is a breaking operation. この発明の実施の形態１に係わる直流高速度遮断器における消弧室を示す斜視図である。It is a perspective view which shows the arc-extinguishing chamber in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention. この発明の実施の形態1に係わる直流高速度遮断器における平板グリッドとＵ字グリッドを示す斜視図である。It is a perspective view which shows the flat plate grid and U-shaped grid in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention. この発明の実施の形態1に係わる直流高速度遮断器における絶縁板を示す斜視図である。1 is a perspective view showing an insulating plate in a DC high-speed circuit breaker according to Embodiment 1 of the present invention. この発明の実施の形態１に係わる直流高速度遮断器における絶縁板と平板グリッドおよびＵ字グリッドを示す（ａ）正面図および（ｂ）側面図である。It is the (a) front view and the (b) side view which show the insulation board, flat plate grid, and U-shaped grid in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention. この発明の実施の形態１に係わる直流高速度遮断器における消弧室上部を示す斜視分解図である。It is a perspective exploded view which shows the arc-extinguishing chamber upper part in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention. この発明の実施の形態１に係わる直流高速度遮断器における消弧室下部を示す斜視分解図である。It is a perspective exploded view which shows the arc-extinguishing chamber lower part in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention. この発明の実施の形態１に係わる直流高速度遮断器における消弧室下部を示す（ａ）正面分解図および（ｂ）側面分解図である。It is the (a) front exploded view and (b) side exploded view which show the arc-extinguishing chamber lower part in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention. この発明の実施の形態１に係わる直流高速度遮断器における消弧室のアークガスの流れおよび開口部の関係を示す（ａ）消弧室正面断面図および（ｂ）Ａ－Ａ線における断面図である。FIG. 3A is a front sectional view of an arc extinguishing chamber and a sectional view taken along line AA showing the relationship between the flow of arc gas in the arc extinguishing chamber and the opening in the DC high-speed circuit breaker according to Embodiment 1 of the present invention; is there. この発明の実施の形態１に係わる直流高速度遮断器における消弧室のアークガスの流れやすさである開口部の開口断面積と消弧室位置の関係を示す特性図である。It is a characteristic view which shows the relationship between the opening cross-sectional area of the opening part which is the ease of the arc gas flow of the arc-extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention, and the arc-extinguishing chamber position. この発明の実施の形態２に係わる直流高速度遮断器における消弧室のグリッド配置部におけるアーク放電とアーク電圧の関係を示す要部正面図である。It is a principal part front view which shows the relationship between the arc discharge and arc voltage in the grid arrangement | positioning part of the arc extinguishing chamber in the direct-current high-speed circuit breaker concerning Embodiment 2 of this invention. この発明の実施の形態３に係わる直流高速度遮断器における消弧室のアークの留め易さを示す正面図である。It is a front view which shows the ease of holding | maintaining the arc of the arc-extinguishing chamber in the direct-current high-speed circuit breaker concerning Embodiment 3 of this invention. この発明の実施の形態４に係わる直流高速度遮断器における消弧室の小電流時のアークと平板グリッドとＵ字グリッドの配置を示す正面図である。It is a front view which shows arrangement | positioning of the arc at the time of the small electric current of the arc-extinguishing chamber in the direct-current high-speed circuit breaker concerning Embodiment 4 of this invention, a flat grid, and a U-shaped grid. この発明の実施の形態４に係わる直流高速度遮断器における消弧室のアークが通電導体であるアークホーンから受ける電磁力を示す特性図である。It is a characteristic view which shows the electromagnetic force which the arc of the arc extinguishing chamber in the direct-current high-speed circuit breaker concerning Embodiment 4 of this invention receives from the arc horn which is an electricity supply conductor. この発明の実施の形態４に係わる直流高速度遮断器における消弧室のアークに働く電磁力を示す特性図である。It is a characteristic view which shows the electromagnetic force which acts on the arc of the arc extinguishing chamber in the direct-current high-speed circuit breaker concerning Embodiment 4 of this invention. この発明の実施の形態５に係わる直流高速度遮断器における磁極板の効果を示す（ａ）正面図および（ｂ）側面図である。It is the (a) front view and (b) side view which show the effect of the magnetic pole plate in the direct-current high-speed circuit breaker concerning Embodiment 5 of this invention. この発明の実施の形態６に係わる直流高速度遮断器におけるＵ字グリッドを示す（ａ）正面図および（ｂ）側面図である。It is the (a) front view and (b) side view which show the U-shaped grid in the direct-current high-speed circuit breaker concerning Embodiment 6 of this invention. この発明の実施の形態７に係わる直流高速度遮断器における磁極板を示す（ａ）正面図および（ｂ）側面図である。It is the (a) front view and (b) side view which show the magnetic pole plate in the direct-current high-speed circuit breaker concerning Embodiment 7 of this invention. 従来の直流高速度遮断器を示す斜視図である。It is a perspective view which shows the conventional DC high-speed circuit breaker. 従来の直流高速度遮断器を示す（ａ）正面図および（ｂ）Ｂ－Ｂ線における断面図である。It is the sectional view in the (a) front view and the (b) BB line which show the conventional direct-current high-speed circuit breaker. 従来の他の直流高速度遮断器を示す（ａ）正面図および（ｂ）断面図である。It is the (a) front view and (b) sectional view showing other conventional direct-current high-speed circuit breakers.
実施の形態１．
　以下、この発明の実施の形態１を図１から図１１に基づいて説明するが、各図において、同一、または相当部材、部位については同一符号を付して説明する。図１はこの発明の実施の形態１に係わる直流高速度遮断器における接点閉合状態を示す側断面図である。図２はこの発明の実施の形態１に係わる直流高速度遮断器における接点が開離動作中の状態を示す側断面図である。 Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 11. In each drawing, the same or equivalent members and parts will be described with the same reference numerals. 1 is a side sectional view showing a contact closing state in a DC high-speed circuit breaker according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view showing a state in which the contact in the DC high-speed circuit breaker according to Embodiment 1 of the present invention is in a breaking operation.
　まず、図１により直流高速度遮断器の構成について説明する。直流高速度遮断器１０１は、電流通電時において、消弧空間が形成された消弧室１０２の下部に配置された上部導体１０３とその下側に配置された下部導体１０４を上部導体１０３に接続された固定側主接点１０５と、下部導体１０４に接続した可動子１０６に接続された可動側主接点１０７とが接触し、可動子１０６が上部導体１０３と下部導体１０４を介して電流を通電させている。 First, the configuration of the DC high-speed circuit breaker will be described with reference to FIG. The direct current high-speed circuit breaker 101 connects the upper conductor 103 disposed below the arc extinguishing chamber 102 in which the arc extinguishing space is formed and the lower conductor 104 disposed below the upper conductor 103 to the upper conductor 103 when current is applied. The fixed-side main contact 105 made in contact with the movable-side main contact 107 connected to the mover 106 connected to the lower conductor 104, and the mover 106 causes current to flow through the upper conductor 103 and the lower conductor 104. ing.
　電流遮断時では、事故電流が流れると、下部導体１０４に配置された過電流検出器１０８が過電流を検出および動作し、電流通電時において、可動子１０６を保持していたラッチ１０９を解除することで、回転軸１１０を中心に可動子１０６が時計方向に回転し開極動作を行う。固定側主接点１０５および可動側主接点１０７は消弧室１０２内部に収納されており、固定側主接点１０５および可動側主接点１０７の上部には遮断時にアークＫが発生するアーク接触子が配置されており、固定側アーク接触子１１１と可動側アーク接触子１１２によって構成されている。 At the time of current interruption, when an accident current flows, the overcurrent detector 108 disposed on the lower conductor 104 detects and operates the overcurrent, and releases the latch 109 holding the mover 106 when the current is energized. As a result, the movable element 106 rotates clockwise around the rotation shaft 110 to perform the opening operation. The fixed-side main contact 105 and the movable-side main contact 107 are accommodated in the arc extinguishing chamber 102, and an arc contact that generates an arc K when interrupted is disposed above the fixed-side main contact 105 and the movable-side main contact 107. The fixed-side arc contact 111 and the movable-side arc contact 112 are configured.
　これら固定側アーク接触子１１１と可動側アーク接触子１１２は、開極動作において、固定側主接点１０５および可動側主接点１０７の開離の後に遅れて開離することで、アークＫが固定側主接点１０５および可動側主接点１０７で発生し溶損することを防止し、固定側主接点１０５および可動側主接点１０７を保護している。 The fixed-side arc contact 111 and the movable-side arc contact 112 are opened after the opening of the fixed-side main contact 105 and the movable-side main contact 107 in the opening operation, so that the arc K is fixed. It prevents the main contact 105 and the movable main contact 107 from being melted and protects the fixed main contact 105 and the movable main contact 107.
　固定側アーク接触子１１１と可動側アーク接触子１１２の上部には発生したアークＫを転流させ消弧室１０２上部へと導くためのアークホーンが配置されており、アークホーンは固定側アークホーン１１３と可動側アークホーン１１４によって構成されている。 An arc horn for commutating the generated arc K and guiding it to the upper part of the arc extinguishing chamber 102 is disposed above the fixed side arc contact 111 and the movable side arc contact 112. The arc horn is a fixed side arc horn. 113 and the movable side arc horn 114 are comprised.
　消弧室１０２の上側には、電極降下電圧およびアーク長さの延長によって、アーク電圧を高め限流遮断するための磁性を持つ薄板状の磁性体からなるグリッド１１５ａが複数配置されており、グリッド１１５ａのグリッド集合体１１５の上部側にはアークガスを消弧室１０２外部へと排気するための排気口１１６が設けられている。 On the upper side of the arc extinguishing chamber 102, a plurality of grids 115a made of a thin plate-like magnetic material having magnetism for increasing the arc voltage and cutting off the current limit by extending the electrode drop voltage and the arc length are arranged. An exhaust port 116 for exhausting arc gas to the outside of the arc extinguishing chamber 102 is provided on the upper side of the grid assembly 115 of 115a.
　次に、図３から図９に基づいて、この発明の実施の形態１に係わる直流高速度遮断器における消弧室の構成について説明する。図３はこの発明の実施の形態１に係わる直流高速度遮断器における消弧室を示す斜視図である。図４はこの発明の実施の形態1に係わる直流高速度遮断器における平板グリッドとＵ字グリッドを示す斜視図である。図５はこの発明の実施の形態1に係わる直流高速度遮断器における絶縁板を示す斜視図である。図６はこの発明の実施の形態１に係わる直流高速度遮断器における絶縁板と平板グリッドおよびＵ字グリッドを示す（ａ）正面図および（ｂ）側面図である。図７はこの発明の実施の形態１に係わる直流高速度遮断器における消弧室上部を示す斜視分解図である。図８はこの発明の実施の形態１に係わる直流高速度遮断器における消弧室下部を示す斜視分解図である。図９はこの発明の実施の形態１に係わる直流高速度遮断器における消弧室下部を示す（ａ）正面分解図および（ｂ）側面分解図である。 Next, the configuration of the arc extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 3 is a perspective view showing an arc extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention. FIG. 4 is a perspective view showing a flat grid and a U-shaped grid in the DC high-speed circuit breaker according to Embodiment 1 of the present invention. FIG. 5 is a perspective view showing an insulating plate in the DC high-speed circuit breaker according to Embodiment 1 of the present invention. FIG. 6: is the (a) front view and the (b) side view which show the insulation board, flat plate grid, and U-shaped grid in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention. FIG. 7 is a perspective exploded view showing the upper part of the arc extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention. FIG. 8 is an exploded perspective view showing a lower part of the arc extinguishing chamber in the DC high-speed circuit breaker according to Embodiment 1 of the present invention. FIG. 9: is (a) front exploded view and (b) side exploded view which show the arc-extinguishing chamber lower part in the direct-current high-speed circuit breaker concerning Embodiment 1 of this invention.
　消弧室１０２は、３つの構成要素から成っている。１つ目は、図３、図８、図９に示すように、固定側主接点１０５、可動側主接点１０７、固定側アーク接触子１１１、可動側アーク接触子１１２を両側から挟むように配置され、固定側主接点１０５および可動側主接点１０７で発生するアークガスを消弧室１０２外に導く第１アークガス流通路Ｒ１を形成する一対の第１絶縁側板１２３である。２つ目は、図４、図７、図９、図１０に示すように、固定側主接点１０５および可動側主接点１０７、固定側アーク接触子１１１および可動側アーク接触子１１２の上方側に配置され、第１絶縁側板１２３間の間隔より大きい幅に構成され、第１アークガス流通路Ｒ１と連通し第１アークガス流通路Ｒ１の断面積より大きい断面積の第２アークガス流通路Ｒ２を形成する複数のグリッドである平板グリッド１１８およびＵ字グリッド１１９である。３つ目は、図７、図１０に示すように、グリッドを構成する平板グリッド１１８およびＵ字グリッド１１９を両側から挟むように配置され、グリッドを構成する平板グリッド１１８およびＵ字グリッド１１９の上方側に第２アークガス流通路Ｒ２と連通し第２アークガス流通路Ｒ２の断面積より大きい断面積の第３アークガス流通路Ｒ３を形成するとともに第１絶縁側板１２３間の幅より大きい幅に配置された一対の第２絶縁側板１２４であり、これら３つの構成要素により消弧室１０２が構成されている。
なお、第２絶縁側板１２４間の幅は第１絶縁側板１２３間の幅よりも大きな幅に構成され、例えば図１０に示すように約３倍の幅とされた場合を示している。 The arc extinguishing chamber 102 is composed of three components. First, as shown in FIGS. 3, 8, and 9, the fixed-side main contact 105, the movable-side main contact 107, the fixed-side arc contact 111, and the movable-side arc contact 112 are arranged to be sandwiched from both sides. The pair of first insulating side plates 123 form a first arc gas flow passage R1 that guides the arc gas generated at the fixed main contact 105 and the movable main contact 107 to the outside of the arc extinguishing chamber 102. Second, as shown in FIGS. 4, 7, 9, and 10, the fixed side main contact 105 and the movable side main contact 107, the fixed side arc contact 111, and the movable side arc contact 112 are located above the movable side arc contact 112. The second arc gas flow passage R2 is disposed and has a width larger than the interval between the first insulating side plates 123 and communicates with the first arc gas flow passage R1 and has a cross-sectional area larger than that of the first arc gas flow passage R1. A flat grid 118 and a U-shaped grid 119 are a plurality of grids. As shown in FIGS. 7 and 10, the third one is arranged so as to sandwich the flat grid 118 and the U-shaped grid 119 constituting the grid from both sides, and above the flat grid 118 and the U-shaped grid 119 constituting the grid. A third arc gas flow passage R3 having a cross-sectional area larger than the cross-sectional area of the second arc gas flow passage R2 is formed on the side, and is arranged with a width larger than the width between the first insulating side plates 123. A pair of second insulating side plates 124, and the arc extinguishing chamber 102 is constituted by these three components.
The width between the second insulating side plates 124 is configured to be larger than the width between the first insulating side plates 123. For example, the width is about three times as shown in FIG.
　図４から図７に示すように、消弧室１０２の内部には固定側アーク接触子１１１と可動側アーク接触子１１２側に向けてＶ字形状のノッチ１１７がそれぞれ設けられた平板グリッド１１８およびＵ字グリッド１１９が配置されている。これら平板グリッド１１８およびＵ字グリッド１１９によりグリッドが構成されている。 As shown in FIGS. 4 to 7, a flat grid 118 provided with a V-shaped notch 117 in the arc extinguishing chamber 102 toward the fixed side arc contact 111 and the movable side arc contact 112, respectively, and A U-shaped grid 119 is arranged. The flat grid 118 and the U-shaped grid 119 constitute a grid.
　また、図５、図６に示すように、平板グリッド１１８の板厚方向の側面にはアークＫが平板グリッド１１８から飛び出すことを防ぐために絶縁板１２０が配置され、Ｕ字グリッド１１９の側面にはアークＫがＵ字グリッド１１９から飛び出すことを防ぐために絶縁板１２０と絶縁板１２１が配置されている。 Further, as shown in FIGS. 5 and 6, an insulating plate 120 is disposed on the side surface in the plate thickness direction of the flat grid 118 to prevent the arc K from jumping out of the flat grid 118, and on the side surface of the U-shaped grid 119. Insulating plate 120 and insulating plate 121 are arranged to prevent arc K from jumping out of U-shaped grid 119.
　さらに、図５から図７に示すように、平板グリッド１１８およびＵ字グリッド１１９からなるグリッドを複数の群毎に配置した間隔絶縁板１２２を平板グリッド１１８およびＵ字グリッド１１９の上方側に伸長した状態で配置している。 Further, as shown in FIGS. 5 to 7, a spacing insulating plate 122 in which a grid made up of a flat grid 118 and a U-shaped grid 119 is arranged for each of a plurality of groups is extended above the flat grid 118 and the U-shaped grid 119. Arranged in a state.
　そして、図３、図７、図８、図９に示すように、平板グリッド１１８、Ｕ字グリッド１１９および絶縁板１２０、絶縁板１２１、間隔絶縁板１２２を両側から挟むように第２絶縁側板１２４が配置され、第２絶縁側板１２４の内側に配置された絶縁板１２５に細長い溝１２５ａを設け、それらの溝１２５ａに平板グリッド１１８、Ｕ字グリッド１１９および絶縁板１２０、絶縁板１２１、間隔絶縁板１２２をはめ込んで固定している。 3, 7, 8, and 9, the second insulating side plate 124 sandwiches the flat plate grid 118, the U-shaped grid 119, the insulating plate 120, the insulating plate 121, and the gap insulating plate 122 from both sides. Are provided, and an elongated plate 125a is provided in an insulating plate 125 disposed inside the second insulating side plate 124, and a flat plate grid 118, a U-shaped grid 119 and an insulating plate 120, an insulating plate 121, a spacing insulating plate are provided in these grooves 125a. 122 is fitted and fixed.
　また、図８、図９に示すように、第１絶縁側板１２３の内側には、遮断時において、アークＫを冷却することで消弧性能を向上させる消弧材料１２６が配置されており、その外側の第１絶縁側板１２３の内部にはアークＫに働く電磁力向上のために配置された第１磁極板１２７が配置され、アークＫが短絡することを防ぐ絶縁板１２８，１２９によって覆われるように配置されている。また、第２絶縁側板１２４の内部にはアークＫに働く電磁力向上のために配置された第２磁極板１３０が配置され、アークＫが短絡することを防ぐ絶縁板１３１によって覆われるように配置されている。 As shown in FIGS. 8 and 9, an arc extinguishing material 126 that improves the arc extinguishing performance by cooling the arc K at the time of interruption is disposed inside the first insulating side plate 123. A first magnetic pole plate 127 arranged for improving electromagnetic force acting on the arc K is arranged inside the outer first insulating side plate 123 so as to be covered with insulating plates 128 and 129 that prevent the arc K from short-circuiting. Is arranged. Further, a second magnetic pole plate 130 arranged for improving the electromagnetic force acting on the arc K is arranged inside the second insulating side plate 124 and arranged so as to be covered with an insulating plate 131 that prevents the arc K from being short-circuited. Has been.
　次に、図１０に基づき、この発明の実施の形態１に係わる直流高速度遮断器における消弧室のアークガスの流れおよび開口部の関係について説明する。第１絶縁側板１２３間には固定側主接点１０５および可動側主接点１０７で発生するアークガスを消弧室１０２外に導く第１アークガス流通路Ｒ１が形成されており、矢印Ｋ１に示すようにアークガスが第１アークガス流通路Ｒ１を流通する。 Next, the relationship between the flow of arc gas in the arc extinguishing chamber and the opening in the DC high-speed circuit breaker according to Embodiment 1 of the present invention will be described with reference to FIG. A first arc gas flow passage R1 is formed between the first insulating side plates 123 to guide the arc gas generated at the fixed main contact 105 and the movable main contact 107 to the outside of the arc extinguishing chamber 102, and the arc gas is indicated by an arrow K1. Flows through the first arc gas flow passage R1.
　第１アークガス流通路Ｒ１を矢印Ｋ１に示すように流通したアークガスは、平板グリッド１１８およびＵ字グリッド１１９間の第１アークガス流通路Ｒ１の断面積より大きい断面積の第２アークガス流通路Ｒ２に矢印Ｋ２に示すように流通し、さらに、第２アークガス流通路Ｒ２を流通したアークガスは、平板グリッド１１８およびＵ字グリッド１１９の上方側の第２アークガス流通路Ｒ２の断面積より大きい断面積の第３アークガス流通路Ｒ３に矢印Ｋ３に示すように流通する。そして、第３アークガス流通路Ｒ３を流通したアークガスは、第１絶縁側板１２３間の開口部である排気口１１６から消弧室１０２外に矢印Ｋ４に示すように導出される。 The arc gas flowing through the first arc gas flow path R1 as indicated by the arrow K1 is indicated by an arrow in the second arc gas flow path R2 having a cross-sectional area larger than the cross-sectional area of the first arc gas flow path R1 between the flat grid 118 and the U-shaped grid 119. The arc gas that has circulated as indicated by K2 and that has circulated through the second arc gas flow path R2 has a third cross-sectional area that is larger than the cross-sectional area of the second arc gas flow path R2 above the flat grid 118 and the U-shaped grid 119. It flows through the arc gas flow passage R3 as indicated by an arrow K3. The arc gas flowing through the third arc gas flow passage R3 is led out of the arc extinguishing chamber 102 from the exhaust port 116, which is an opening between the first insulating side plates 123, as indicated by an arrow K4.
　このように、この実施の形態１においては、消弧室１０２における位置ア、位置イ、位置ウにおいて、位置ア＞位置イ＞位置ウの関係に構成されたものに対し、従来の直流高速度遮断器においては図２０及び図２１に示すように、側面外側に磁極板３３を設けた絶縁板３２の幅は、固定側主接点および可動側主接点からグリッド先端部まで同じ幅となっており、位置ア＝位置イ＝位置ウの関係となっており、両者の関係による特性は図１１に示すように、この実施の形態１においては位置ア＞位置イ＞位置ウのように消弧室１０２の下部から消弧室１０２の上部に向けてアークガス流通路の断面積を大きくしたことにより、従来のものと比較して、アークガスを流れやすくすることができ、アークガスの排気性能を向上させ接点間での再点弧を抑制し、高い遮断性能を得ることができる。 As described above, in the first embodiment, the position DC, the position A, and the position C in the arc extinguishing chamber 102 are configured in the relationship of position A> position A> position U. In the circuit breaker, as shown in FIG. 20 and FIG. 21, the width of the insulating plate 32 provided with the magnetic pole plate 33 on the outer side surface is the same from the fixed main contact and the movable main contact to the grid tip. , Position a = position i = position u, and the characteristic due to the relationship between the two is as shown in FIG. By increasing the cross-sectional area of the arc gas flow passage from the lower part of 102 toward the upper part of arc extinguishing chamber 102, the arc gas can flow more easily than the conventional one, and the arc gas exhaust performance is improved and the contact point is increased. Re-pointing between Suppressed, it is possible to obtain high interruption performance.
　また、第１絶縁側板１２３の内部にアークＫに働く電磁力向上のために第１磁極板１２７を配置し、第２絶縁側板１２４の内部にアークＫに働く電磁力向上のために第２磁極板１３０を配置したことにより、大電流においてアークが第１磁極板１２７、第２磁極板１３０を介して短絡し遮断失敗することを防止することが可能であり、小電流から大電流に至るまで確実に遮断することができる。 In addition, a first magnetic pole plate 127 is disposed inside the first insulating side plate 123 to improve the electromagnetic force acting on the arc K, and a second magnetic pole is arranged inside the second insulating side plate 124 to improve the electromagnetic force acting on the arc K. By arranging the plate 130, it is possible to prevent the arc from being short-circuited through the first magnetic pole plate 127 and the second magnetic pole plate 130 at a large current and failing to cut off, and from a small current to a large current. It can be reliably shut off.
実施の形態２．
　この発明の実施の形態２を図１２に基づいて説明する。図１２はこの発明の実施の形態２に係わる直流高速度遮断器における消弧室のグリッド配置部におけるアーク放電とアーク電圧の関係を示す要部正面図である。 Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 12 is a front view of a main part showing the relationship between arc discharge and arc voltage in the grid arrangement part of the arc extinguishing chamber in the DC high speed circuit breaker according to Embodiment 2 of the present invention.
　Ｕ字グリッド１１９は１枚の磁性板をＵの字型に折り曲げているため、中間部は空間１３２となる。Ｕ字グリッド１１９底部の中央位置にはＶ字状のノッチ１１７が設けられており、中間部の空間１３２と貫通しアークガスが吹き抜けられる構造となる。 Since the U-shaped grid 119 is formed by bending one magnetic plate into a U-shape, the middle portion becomes a space 132. A V-shaped notch 117 is provided at the center of the bottom of the U-shaped grid 119, and the arc gas can be blown through the intermediate space 132.
　平板グリッド１１８とＵ字グリッド１１９を配置した際のアーク放電の違いを説明する。平板グリッド１１８のみ配置した場合では、隣接する平板グリッド１１８間でアーク放電Ｈが発生する。Ｕ字グリッド１１９を配置した場合ではＵ字グリッド１１９底部の両端はつながっているため、中間部の空間１３２にはアーク放電は発生せず、Ｕ字グリッド１１９間でアーク放電Ｈが発生する。 The difference in arc discharge when the flat grid 118 and the U-shaped grid 119 are arranged will be described. When only the flat grid 118 is disposed, arc discharge H occurs between the adjacent flat grids 118. When the U-shaped grid 119 is arranged, both ends of the bottom of the U-shaped grid 119 are connected. Therefore, no arc discharge is generated in the space 132 in the middle portion, and an arc discharge H is generated between the U-shaped grids 119.
　そのため、平板グリッド１１８の枚数、あるいはＵ字グリッド１１９底部の長さ（幅）や枚数を変えることでアーク放電する平板グリッド１１８およびＵ字グリッド１１９のそれぞれの間隔、つまりアーク長１３３と電極降下する平板グリッド１１８およびＵ字グリッド１１９の枚数を調整することができるので、任意のアーク電圧を発生させることが可能である。 Therefore, by changing the number of flat grids 118 or the length (width) or number of the bottom of the U-shaped grid 119, the distance between the flat grid 118 and the U-shaped grid 119 that arc discharge, that is, the arc length 133 and the electrode drop. Since the number of the flat grid 118 and the U-shaped grid 119 can be adjusted, an arbitrary arc voltage can be generated.
　この実施の形態２によれば、グリッドとして、平板グリッド１１８およびＵ字グリッド１１９を組み合わせて用いることにより、任意のアーク電圧を発生させることが可能である。 According to the second embodiment, it is possible to generate an arbitrary arc voltage by using a combination of the flat grid 118 and the U-shaped grid 119 as the grid.
実施の形態３．
　この発明の実施の形態３を図１３に基づいて説明する。図１３はこの発明の実施の形態３に係わる直流高速度遮断器における消弧室のアークの留め易さを示す正面図である。 Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 13: is a front view which shows the ease of the arc of the arc extinguishing chamber in the direct-current high-speed circuit breaker concerning Embodiment 3 of this invention.
　図１３にて示す通り、消弧室１０２において、アークが留まりやすい領域は、固定側主接点１０５および可動側主接点１０７および固定側アーク接触子１１１と可動側アーク接触子１１２などの接点部付近１３６と、平板グリッド１１８およびＵ字グリッド１１９などのグリッド配置部１３７と、平板グリッド１１８およびＵ字グリッド１１９の上方側の消弧室上部１３８に分けることができる。このうち、接点部付近１３６が最もアークが留まりやすい場合は再点弧となり、消弧室上部１３８が最もアークが留まりやすい場合はアークが消弧室上部に飛び出してしまう橋絡となり、この両者は遮断性能を低下させるもしくは遮断失敗の原因となる。 As shown in FIG. 13, in the arc extinguishing chamber 102, the region where the arc tends to stay is in the vicinity of the contact portion such as the fixed side main contact 105, the movable side main contact 107, the fixed side arc contact 111 and the movable side arc contact 112. 136, a grid arrangement portion 137 such as a flat grid 118 and a U-shaped grid 119, and an arc extinguishing chamber upper portion 138 above the flat grid 118 and the U-shaped grid 119. Of these, when the arc is most likely to stay in the contact portion 136, re-ignition is performed, and when the arc extinguishing chamber upper part 138 is the most prone to arc, the arc jumps out to the upper part of the arc extinguishing chamber. It will reduce the shut-off performance or cause the shut-off failure.
　そのため、遮断完了まで、遮断に必要となる安定したアーク電圧を維持するためにはグリッド配置部１３７を最もアークが放電しやすく留まりやすい状態とする必要がある。放電のしやすさの因子の1つであるアークガスはＵ字グリッド１１９もＶ字形状のノッチ１１７を介して中間部の空間１３２を通り、消弧室１０２の上部の排気口１１６から排気されるため、排気性能は平板グリッド１１８を配置した場合と同じである。 Therefore, in order to maintain a stable arc voltage necessary for the interruption until the interruption is completed, it is necessary to make the grid arrangement part 137 in a state where the arc is most easily discharged and stays. The arc gas, which is one of the factors for the ease of discharge, passes through the space 132 in the middle portion of the U-grid 119 via the V-shaped notch 117 and is exhausted from the exhaust port 116 at the top of the arc extinguishing chamber 102. Therefore, the exhaust performance is the same as when the flat grid 118 is arranged.
　また、Ｕ字グリッド１１９底部の幅や枚数比を調整することで、アークが放電しやすいグリッドの間隔とすることが可能である。そのため、Ｕ字グリッド１１９を用いることで、接点部付近１３６でのアークガスの排気しやすさは同じのまま、グリッド配置部１３７でのアークの留まりやすさは向上できる。 Also, by adjusting the width and the number ratio of the bottom of the U-shaped grid 119, it is possible to make the grid spacing easy to discharge arcs. Therefore, by using the U-shaped grid 119, it is possible to improve the easiness of staying of the arc in the grid arrangement portion 137 while maintaining the same ease of discharging the arc gas in the vicinity of the contact portion 136.
　よって、グリッド配置部１３７が最もアークが放電しやすく留まりやすい状態とすることで、アークはグリッド配置部１３７で安定的に維持され、遮断に必要となる電源電圧よりも高く安定した一定のアーク電圧を維持することが可能である。 Therefore, by setting the grid arrangement part 137 in a state in which the arc is most likely to discharge and stay, the arc is stably maintained in the grid arrangement part 137 and is a constant arc voltage that is higher and stable than the power supply voltage required for interruption. Can be maintained.
　このように、グリッド間隔、アーク長を短くし、グリッド配置部１３７でアークが最も留まりやすい状態とし、遮断完了まで安定したアーク電圧を維持することができる。 As described above, the grid interval and arc length are shortened, the arc is most likely to stay at the grid placement portion 137, and a stable arc voltage can be maintained until the interruption is completed.
実施の形態４．
　この発明の実施の形態４を図１４から図１６に基づいて説明するが、各図において、同一、または相当部材、部位については同一符号を付して説明する。図１４はこの発明の実施の形態４に係わる直流高速度遮断器における消弧室の小電流時のアークと平板グリッドとＵ字グリッドの配置を示す正面図である。図１５はこの発明の実施の形態４に係わる直流高速度遮断器における消弧室のアークが通電導体であるアークホーンから受ける電磁力を示す特性図である。図１６はこの発明の実施の形態４に係わる直流高速度遮断器における消弧室のアークに働く電磁力を示す特性図である。 Embodiment 4 FIG.
A fourth embodiment of the present invention will be described with reference to FIGS. 14 to 16. In the drawings, the same or corresponding members and parts will be described with the same reference numerals. FIG. 14 is a front view showing the arrangement of arcs, flat grids, and U-shaped grids when the arc extinguishing chamber is at a small current in a DC high-speed circuit breaker according to Embodiment 4 of the present invention. FIG. 15 is a characteristic diagram showing the electromagnetic force received by the arc of the arc extinguishing chamber from the arc horn as the conducting conductor in the DC high-speed circuit breaker according to Embodiment 4 of the present invention. FIG. 16: is a characteristic view which shows the electromagnetic force which acts on the arc of the arc-extinguishing chamber in the direct current | flow high speed circuit breaker concerning Embodiment 4 of this invention.
　この発明の実施の形態４における消弧室１０２の平板グリッド１１８とＵ字グリッド１１９は、図１４に示すように、平板グリッド１１８を中央側１３９に配置し、Ｕ字グリッド１１９を両側１４０に配置して構成している。 As shown in FIG. 14, the flat grid 118 and the U-shaped grid 119 of the arc extinguishing chamber 102 according to the fourth embodiment of the present invention are arranged such that the flat grid 118 is arranged on the center side 139 and the U-shaped grid 119 is arranged on both sides 140. Configured.
　アークが受ける電磁力には図１５に示すように電流Ｉが流れる通電導体であるアークホーンである固定側アークホーン１１３と可動側アークホーン１１４から磁束Ｇを受け、フレミング左手の法則に従って発生する電磁力１４２と、図１６に示すように磁性体によりアーク中心方向に働くピンチ力１４３のバランスが崩れ、磁束が弱い領域Ｇ１と磁束が強い領域Ｇ２を有する磁束１４５となることによって発生する電磁力１４４がある。小電流ではアークは通電導体から受ける電磁力１４２が小さいためアークホーンである固定側アークホーン１１３と可動側アークホーン１１４の先端部１４１ａ，１４１ｂまで走行できない。そのため、限られた範囲、つまり中央側のグリッドしか利用できない。しかし、直流電流を遮断するためには電源電圧よりも高いアーク電圧を発生させる必要がある。 As shown in FIG. 15, the electromagnetic force received by the arc receives magnetic flux G from the fixed-side arc horn 113 and the movable-side arc horn 114, which are arc horns that are current-carrying conductors through which the current I flows, and is generated in accordance with the Fleming left-hand rule. The electromagnetic force 144 generated by the balance between the force 142 and the pinch force 143 acting in the arc center direction by the magnetic material as shown in FIG. 16 becomes a magnetic flux 145 having a weak magnetic flux region G1 and a strong magnetic flux region G2. There is. At a small current, the arc cannot travel to the front end portions 141a and 141b of the fixed side arc horn 113 and the movable side arc horn 114 which are arc horns because the electromagnetic force 142 received from the conducting conductor is small. Therefore, only a limited range, that is, the grid on the center side can be used. However, in order to cut off the direct current, it is necessary to generate an arc voltage higher than the power supply voltage.
　そこで、図１４に示すように、中央側１３９に平板グリッド１１８を配置することで小電流時の場合でも、中央側１３９の限られた範囲で多くの平板グリッド１１８をアークが貫通し、電極降下電圧によるアーク電圧上昇効果を有効的に得ることができ、小電流遮断の場合でも高い遮断性能を得ることが可能である。 Therefore, as shown in FIG. 14, by arranging the flat grid 118 on the central side 139, even when the current is small, the arc penetrates many flat grids 118 in a limited range on the central side 139, and the electrode drops. The effect of increasing the arc voltage due to the voltage can be obtained effectively, and it is possible to obtain a high interruption performance even in the case of a small current interruption.
　以上よりこの実施の形態４によれば、中央側１３９に平板グリッド１１８を配置し、両側１４０にＵ字グリッド１１９を配置することで、小電流の限られたアークの走行範囲内でも多くの電極降下によってアーク電圧上昇でき、高い小電流遮断性能を得ることが可能である。 As described above, according to the fourth embodiment, the flat grid 118 is arranged on the central side 139 and the U-shaped grid 119 is arranged on both sides 140, so that a large number of electrodes can be obtained even in the arc traveling range with a small current. The arc voltage can be increased by the drop, and a high small current interruption performance can be obtained.
　このように、アークを走行させ伸長させるための電磁力が低い小電流遮断時においても、限られた範囲で多くのグリッドによる電極降下によるアーク電圧上昇を効果的に利用でき、小電流遮断においても高い遮断性能を得ることができる。 In this way, even when a small current interruption with a low electromagnetic force for running and extending the arc is possible, the arc voltage increase due to the electrode drop due to many grids can be effectively used within a limited range, and even in the small current interruption High blocking performance can be obtained.
実施の形態５．
　この発明の実施の形態５を図１７に基づいて説明する。図１７はこの発明の実施の形態５に係わる直流高速度遮断器における磁極板の効果を示す（ａ）正面図および（ｂ）側面図である。 Embodiment 5 FIG.
Embodiment 5 of the present invention will be described with reference to FIG. FIG. 17A is a front view and FIG. 17B is a side view showing the effect of a magnetic pole plate in a DC high-speed circuit breaker according to Embodiment 5 of the present invention.
　図１７で示すように、例えば第１磁極板１２７を消弧室１０２の第１絶縁側板１２３に配置すると、アークが発生する磁束１４５は第１磁極板１２７中を通過する。一方で第１磁極板１２７を配置していない場合は、磁束１４５は空気中を通過することになる。磁束１４５が第１磁極板１２７中を通過する場合、第１磁極板１２７の磁性体の磁気抵抗は空気より小さい為、磁束１４５の損失が少なくなり電磁力１４４が大きくなる。そのため、第１磁極板１２７はアーク自身が生み出す電磁力１４４を向上させる効果があり、電磁力１４２が小さい小電流遮断では特に効果的である。 As shown in FIG. 17, for example, when the first magnetic pole plate 127 is arranged on the first insulating side plate 123 of the arc extinguishing chamber 102, the magnetic flux 145 generated by the arc passes through the first magnetic pole plate 127. On the other hand, when the first magnetic pole plate 127 is not disposed, the magnetic flux 145 passes through the air. When the magnetic flux 145 passes through the first magnetic pole plate 127, the magnetic resistance of the magnetic material of the first magnetic pole plate 127 is smaller than that of air, so the loss of the magnetic flux 145 is reduced and the electromagnetic force 144 is increased. Therefore, the first magnetic pole plate 127 has an effect of improving the electromagnetic force 144 generated by the arc itself, and is particularly effective in a small current interruption with a small electromagnetic force 142.
　しかし、図２０および図２１に示すように、従来の消弧室３１では磁極板３３が消弧室３１の絶縁板３２の外側にむき出しのまま配置されているため、絶縁板３２で磁極板３３を覆うことができず、磁極板３３を介してアークが短絡し遮断失敗する場合があった。
　そこで、この実施の形態５においては、図８に示すように、第１磁極板１２７を消弧室１０２の第１絶縁側板１２３の内部に配置し、第２磁極板１３０を消弧室１０２の第２絶縁側板１２４の内部に配置して絶縁物で覆い固定することで直接アークが触れることがなく電気的に接続できない構成となっている。 However, as shown in FIGS. 20 and 21, in the conventional arc extinguishing chamber 31, the magnetic pole plate 33 is arranged so as to be exposed outside the insulating plate 32 of the arc extinguishing chamber 31. In some cases, the arc could be short-circuited through the magnetic pole plate 33 and failed to be interrupted.
Therefore, in the fifth embodiment, as shown in FIG. 8, the first magnetic pole plate 127 is disposed inside the first insulating side plate 123 of the arc extinguishing chamber 102, and the second magnetic pole plate 130 is arranged in the arc extinguishing chamber 102. Arranged inside the second insulating side plate 124 and covered and fixed with an insulator, the arc is not directly touched and cannot be electrically connected.
　また、消弧室１０２は第１絶縁側板１２３側の下部と第２絶縁側板１２４側の上部とでは幅寸法が違うため、磁極板としては第１磁極板１２７と第２磁極板１３０とに分割した配置とし、第１磁極板１２７を第１絶縁側板１２３の内部に配置し、第２磁極板１３０を第２絶縁側板１２４の内部に配置した構成とし、例えば第１磁極板１２７を絶縁板１２８で覆い、第２磁極板１３０を絶縁板１３１で覆っているので、直接アークが触れない構成としている。 The arc extinguishing chamber 102 is divided into a first magnetic pole plate 127 and a second magnetic pole plate 130 because the width dimension is different between the lower portion on the first insulating side plate 123 side and the upper portion on the second insulating side plate 124 side. The first magnetic pole plate 127 is disposed inside the first insulating side plate 123 and the second magnetic pole plate 130 is disposed inside the second insulating side plate 124. For example, the first magnetic pole plate 127 is replaced with the insulating plate 128. Since the second magnetic pole plate 130 is covered with the insulating plate 131, the arc is not directly touched.
　この実施の形態５によれば、アークに働く電磁力を向上させる磁極板の効果を損なうことなく、アークもしくはアークガスが第１磁極板１２７、第２磁極板１３０に接触することもなくなり、アークが第１磁極板１２７、第２磁極板１３０を介し短絡し遮断失敗することを防止するこができ、小電流から大電流まで確実に遮断することが可能である。 According to the fifth embodiment, the arc or arc gas does not contact the first magnetic pole plate 127 and the second magnetic pole plate 130 without impairing the effect of the magnetic pole plate that improves the electromagnetic force acting on the arc. It is possible to prevent a short circuit and a failure of interruption through the first magnetic pole plate 127 and the second magnetic pole plate 130, and it is possible to reliably cut off from a small current to a large current.
実施の形態６．
　この発明の実施の形態６を図１８に基づいて説明する。図１８はこの発明の実施の形態６に係わる直流高速度遮断器におけるＵ字グリッドを示す（ａ）正面図および（ｂ）側面図である。 Embodiment 6 FIG.
A sixth embodiment of the present invention will be described with reference to FIG. 18A is a front view and FIG. 18B is a side view showing a U-shaped grid in a DC high-speed circuit breaker according to Embodiment 6 of the present invention.
　図１８に示すように、対向する２枚の平板グリッド１１８を電気的に接続し電流を通電することができれば、Ｕ字グリッド１１９の機能を満足することができる。そのため、ボルト１４６やナット１４７もしくはリベットを用いて接続したり、溶接１４８することでも可能である。 As shown in FIG. 18, the function of the U-shaped grid 119 can be satisfied if two opposing flat grids 118 are electrically connected and current can be passed. Therefore, it is also possible to connect using bolts 146, nuts 147 or rivets, or by welding 148.
実施の形態７．
　この発明の実施の形態７を図１９に基づいて説明する。図１９はこの発明の実施の形態６に係わる直流高速度遮断器における磁極板を示す（ａ）正面図および（ｂ）側面図である。 Embodiment 7 FIG.
A seventh embodiment of the present invention will be described with reference to FIG. 19A is a front view and FIG. 19B is a side view showing a magnetic pole plate in a DC high-speed circuit breaker according to Embodiment 6 of the present invention.
　図１９に示すように、第１磁極板１２７、第２磁極板１３０は1枚の板ではなく、薄い磁極板１４９ａ，１４９ｂをそれぞれ密着して積層し集合体１５０ａ，１５０ｂとする事でも第１磁極板１２７、第２磁極板１３０の機能を満足することが可能である。 As shown in FIG. 19, the first magnetic pole plate 127 and the second magnetic pole plate 130 are not a single plate, but the thin magnetic pole plates 149a and 149b are in close contact with each other to form the aggregates 150a and 150b. The functions of the magnetic pole plate 127 and the second magnetic pole plate 130 can be satisfied.
　なお、この発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略することが可能である。 In the present invention, it is possible to freely combine the respective embodiments within the scope of the invention, and to appropriately modify and omit the respective embodiments.
　この発明は、アークガスを消弧室の上部へと流れやすくし、アークガスの排気性能を向上させ接点間での再点弧を抑制することができ、高い遮断性能を得ることができる直流高速度遮断器の実現に好適である。 The present invention facilitates the flow of arc gas to the upper part of the arc extinguishing chamber, improves the exhaust performance of the arc gas, can suppress re-ignition between the contacts, and can achieve high interruption performance. It is suitable for realization of a vessel.
　１０１　直流高速度遮断器、１０２　消弧室、１０５　固定側主接点、１０７　可動側主接点、１１１　固定側アーク接触子、１１２　可動側アーク接触子、１１８　平板グリッド、１１９　Ｕ字グリッド、１２３　第１絶縁側板、１２４　第２絶縁側板、１２７　第１磁極板、１３０　第２磁極板、１３９　中央側、１４０　両側、Ｒ１　第１アークガス流通路、Ｒ２　第２アークガス流通路、Ｒ３　第３アークガス流通路。　 101 DC high speed circuit breaker, 102 arc extinguishing chamber, 105 fixed main contact, 107 movable main contact, 111 fixed arc contact, 112 movable arc contact, 118 flat grid, 119 U-shaped grid, 123 1st Insulating side plate, 124, second insulating side plate, 127, first magnetic pole plate, 130, second magnetic pole plate, 139, central side, 140, both sides, R1, first arc gas flow passage, R2, second arc gas flow passage, R3, third arc gas flow passage. *

Claims (6)

  1. 　消弧空間が形成される消弧室と、前記消弧室の下方側に配置された固定側主接点と、前記消弧室の下方側に配置され前記固定側主接点と接離される可動側主接点とを備えた直流高速度遮断器であって、前記消弧室は、前記固定側主接点、前記可動側主接点を両側から挟むように配置され、前記固定側主接点および前記可動側主接点で発生するアークガスを前記消弧室外に導く第１アークガス流通路を形成する第１絶縁側板と、前記固定側主接点および前記可動側主接点の上方側に配置され、前記第１絶縁側板間の間隔より大きい幅に構成され、前記第１アークガス流通路と連通し前記第１アークガス流通路の断面積より大きい断面積の第２アークガス流通路を形成する複数のグリッドと、前記グリッドを両側から挟むように配置され、前記グリッドの上方側に前記第２アークガス流通路と連通し前記第２アークガス流通路の断面積より大きい断面積の第３アークガス流通路を形成する第２絶縁側板とにより構成されたことを特徴とする直流高速度遮断器。 An arc extinguishing chamber in which an arc extinguishing space is formed, a fixed main contact disposed below the arc extinguishing chamber, and a movable side disposed below the arc extinguishing chamber and contacted and separated from the fixed main contact A high-speed DC circuit breaker comprising a main contact, wherein the arc-extinguishing chamber is disposed so as to sandwich the fixed-side main contact and the movable-side main contact from both sides, the fixed-side main contact and the movable-side A first insulating side plate that forms a first arc gas flow path for guiding arc gas generated at the main contact to the outside of the arc-extinguishing chamber; and the first insulating side plate disposed above the fixed side main contact and the movable side main contact. A plurality of grids configured to have a width larger than a gap between them and communicating with the first arc gas flow passage to form a second arc gas flow passage having a cross-sectional area larger than a cross-sectional area of the first arc gas flow passage; Arranged so as to sandwich from And a second insulating side plate that communicates with the second arc gas flow passage above the lid and forms a third arc gas flow passage having a cross-sectional area larger than that of the second arc gas flow passage. DC high speed circuit breaker.
  2. 　前記グリッドは、平板グリッドとＵ字グリッドとを組み合わせて構成されたことを特徴とする請求項１に記載の直流高速度遮断器。 The DC high-speed circuit breaker according to claim 1, wherein the grid is configured by combining a flat grid and a U-shaped grid.
  3. 　前記平板グリッドの枚数比および前記Ｕ字グリッドの幅を調整して配置されたことを特徴とする請求項２に記載の直流高速度遮断器。 3. The DC high-speed circuit breaker according to claim 2, wherein the DC high-speed circuit breaker is arranged by adjusting the number ratio of the flat grids and the width of the U-shaped grid.
  4. 　前記平板グリッドは中央側に配置され、前記Ｕ字グリッドは両側に配置されたことを特徴とする請求項２または請求項３に記載の直流高速度遮断器。 The DC high-speed circuit breaker according to claim 2 or 3, wherein the flat grid is disposed on the center side, and the U-grid is disposed on both sides.
  5. 　前記第１絶縁側板に第１磁極板が配置され、前記第２絶縁側板に第２磁極板が配置されたことを特徴とする請求項１から請求項４のいずれか１項に記載の直流高速度遮断器。 5. The DC high voltage according to claim 1, wherein a first magnetic pole plate is disposed on the first insulating side plate, and a second magnetic pole plate is disposed on the second insulating side plate. 6. Speed circuit breaker.
  6. 　前記第１磁極板は第１絶縁側板で覆われ、前記第２磁極板は前記第２絶縁側板で覆われたことを特徴とする請求項５に記載の直流高速度遮断器。 6. The DC high speed circuit breaker according to claim 5, wherein the first magnetic pole plate is covered with a first insulating side plate, and the second magnetic pole plate is covered with the second insulating side plate.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021005889A1 (en) 2019-07-11 2021-01-14 三菱電機株式会社 Air circuit breaker
JPWO2022029931A1 (en) * 2020-08-05 2022-02-10

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7068033B2 (en) 2018-05-18 2022-05-16 三菱電機株式会社 Arc extinguishing device for DC high speed circuit breaker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63129932U (en) * 1987-02-17 1988-08-25
JPH01319217A (en) * 1988-06-20 1989-12-25 Fuji Electric Co Ltd Arc-extinguish chamber of switching equipment
JPH05290682A (en) * 1992-04-10 1993-11-05 Meidensha Corp Dc high speed circuit breaker

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060035194A (en) * 2004-10-21 2006-04-26 엘에스산전 주식회사 Arc extinguishing apparatus for molded case circuit breaker
ITMI20072202A1 (en) * 2007-11-21 2009-05-22 Abb Spa CAMERA D'ARCO FOR A INTERRUPTING DEVICE AND DEVICE OF INTERRUPTION INCLUDING SUCH A BATHROOM.
JP2012043541A (en) * 2010-08-12 2012-03-01 Fuji Electric Fa Components & Systems Co Ltd Circuit breaker
JP5682450B2 (en) * 2011-05-23 2015-03-11 富士電機機器制御株式会社 Circuit breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63129932U (en) * 1987-02-17 1988-08-25
JPH01319217A (en) * 1988-06-20 1989-12-25 Fuji Electric Co Ltd Arc-extinguish chamber of switching equipment
JPH05290682A (en) * 1992-04-10 1993-11-05 Meidensha Corp Dc high speed circuit breaker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021005889A1 (en) 2019-07-11 2021-01-14 三菱電機株式会社 Air circuit breaker
JPWO2021005889A1 (en) * 2019-07-11 2021-12-23 三菱電機株式会社 Air circuit breaker
JP7150178B2 (en) 2019-07-11 2022-10-07 三菱電機株式会社 air circuit breaker
JPWO2022029931A1 (en) * 2020-08-05 2022-02-10
WO2022029931A1 (en) * 2020-08-05 2022-02-10 三菱電機株式会社 Dc circuit breaker
JP7330385B2 (en) 2020-08-05 2023-08-21 三菱電機株式会社 DC circuit breaker

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