WO2022264686A1 - 電気回路遮断装置 - Google Patents
電気回路遮断装置 Download PDFInfo
- Publication number
- WO2022264686A1 WO2022264686A1 PCT/JP2022/018346 JP2022018346W WO2022264686A1 WO 2022264686 A1 WO2022264686 A1 WO 2022264686A1 JP 2022018346 W JP2022018346 W JP 2022018346W WO 2022264686 A1 WO2022264686 A1 WO 2022264686A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cut
- electric circuit
- piece
- power source
- moving body
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000004020 conductor Substances 0.000 claims description 28
- 238000010891 electric arc Methods 0.000 claims description 15
- 239000012212 insulator Substances 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000002159 abnormal effect Effects 0.000 description 73
- 230000005856 abnormality Effects 0.000 description 36
- 230000004308 accommodation Effects 0.000 description 21
- 238000004880 explosion Methods 0.000 description 20
- 230000000903 blocking effect Effects 0.000 description 19
- 239000003721 gunpowder Substances 0.000 description 15
- 238000003780 insertion Methods 0.000 description 14
- 230000037431 insertion Effects 0.000 description 14
- 229920003002 synthetic resin Polymers 0.000 description 14
- 239000000057 synthetic resin Substances 0.000 description 14
- 239000002360 explosive Substances 0.000 description 11
- 239000011810 insulating material Substances 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
- H01H85/10—Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
- H01H39/006—Opening by severing a conductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/18—Casing fillings, e.g. powder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
- H01H2085/388—Means for extinguishing or suppressing arc using special materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/026—Car
Definitions
- the present invention relates to an electric circuit breaker that can be used mainly for electric circuits in automobiles and the like.
- electric circuit breakers have been used to protect the electric circuits mounted on automobiles, etc., and various electrical components connected to the electric circuits. Specifically, when an abnormality occurs in an electric circuit, the electric circuit breaker disconnects a part of the electric circuit to physically cut off the electric circuit.
- the electric circuit interrupting device of Patent Document 1 includes a fuse, a housing, a cut portion arranged in the housing and constituting a part of the electric circuit, and a first end portion side of the housing.
- An electrical circuit interrupting device comprising a power source and a moving body that moves within the housing between the first end and a second end opposite the first end, While the moving body is moved from the first end portion toward the second end portion by the power source, a part of the moving body cuts the portion to be cut to cut off the electric circuit. be.
- the current (accident current) flowing in the electric circuit is induced in the fuse, and the arc caused by the induced current is extinguished in the fuse effectively, quickly and safely. .
- the current that should be interrupted in the electric circuit is assumed to be not only relatively high current but also a wide range of relatively low current. Therefore, in the electric circuit breaker of Patent Document 1, if the current (accident current) induced when the electric circuit is broken is relatively low, the fuse cuts off the current depending on the fusing characteristics of the fuse. In some cases, it took a long time to turn on the power, and in some cases, the current could not be cut off.
- the present invention provides an electric circuit breaker that is capable of interrupting not only relatively high currents but also a wide range of currents to relatively low currents.
- An electrical circuit breaker comprises a housing, a section to be cut arranged in the housing and forming part of an electrical circuit, a first power source arranged on the first end side of the housing, An electrical circuit interrupting device comprising a moving body that moves within the housing between the first end and a second end opposite the first end, comprising a fusing portion and an extinguisher.
- a fuse function part having an arc member is provided, and the movable body is moved by the first power source from the first end toward the second end while a part of the movable body is It is configured to cut a cut piece located between the base pieces on both sides of the cut portion, and when the current to be cut off is low, the fuse function portion and the cut portion are not connected, and the cut piece is cut.
- a power source moves the moving body toward the second end to cut the cut pieces positioned between the base pieces on both sides of the cut portion, thereby cutting the base pieces on both sides of the cut portion.
- the fuse function part and the part to be cut are connected, and the movable body is moved toward the second end by the first power source.
- the electric circuit interrupting device of the present invention includes a pair of electrode portions connected to terminals on both sides of the fuse function portion. and cut the cut pieces positioned between the base pieces on both sides of the cut portion, thereby interrupting the energized state of the base pieces on both sides of the cut portion and cutting the cut piece a restricting means operated by a second power source restricts the movement of the movable body so that a portion of the cut target portion and the electrode portion are not connected in order to prevent connection between the portion and the fuse function portion;
- the moving body moves toward the second end, and the base pieces on both sides of the cut portion are energized through the cut piece, and the cut portion is cut. is in contact with the electrode portion to connect the portion to be cut and the fuse function portion. It is characterized in that it is configured such that the state of energization through the is cut off.
- the electrode portion is provided on the moving body, and the state in which the base pieces on both sides of the cut portion are energized through the cut piece means that the base piece and , the base piece and the cut piece that is physically cut and separated are in a state of being energized by arc discharge, and the energized state changes with the movement of the moving body. It is characterized in that an insulator is interposed between the pieces to cut off.
- the electrode portion is provided in the housing, and the state in which the base pieces on both sides of the cut portion are energized through the cut piece means that the base piece and , the base piece and the cut piece physically cut off are in a state of being energized by a conductor provided on the moving body, and in the energized state, the conductor of the moving body is
- the base piece of the portion to be cut and the electrode portion are connected to each other through an intervening portion, and the portion to be cut and the fuse function portion are connected.
- the electric circuit breaker of the present invention comprises a circuit section connected to the cut target section via the fuse function section, and when the current to be cut off is low, the circuit section is operated by the second power source.
- the fuse function portion and the portion to be disconnected are disconnected by the moving breaking member, and then the moving member is moved toward the second end portion by the first power source, By cutting the cut pieces located between the base pieces on both sides of the cut portion, the state where the base pieces on both sides of the cut portion are energized is cut off, and when the current to be cut off is high, the circuit
- the moving body is moved toward the second end portion by the first power source while the fuse function portion and the cut portion are connected to each other without breaking off the cut portion. By cutting the cut pieces positioned between the base pieces on both sides of the portion, the energized state of the base pieces on both sides of the cut portion is cut off.
- the fuse element of the fuse function part constitutes a part of the circuit part, and the fuse element is surrounded by an arc-extinguishing material to cut off the electric circuit.
- the fuse element which is part of the circuit section, is interrupted by a circuit breaker moved by the second power source.
- the electric circuit breaking device of the present invention is equipped with quick disconnection capability not only in relatively high currents but also in a wide range of currents ranging from relatively low currents.
- the electric circuit breaker of the present invention is equipped with quick-acting properties in a wide range of current ranges from relatively high currents to relatively low currents.
- (a) is an overall perspective view of the lower housing that constitutes the housing of the electrical circuit breaker according to Embodiment 1 of the present invention
- (b) is a plan view of the lower housing
- (c) is AA. It is a sectional view.
- (a) is an overall perspective view of the upper housing that constitutes the housing of the electrical circuit breaker according to Embodiment 1 of the present invention
- (b) is a plan view of the upper housing
- (c) is the B-line of the upper housing. It is a B sectional view.
- FIG. 1(a) is an exploded perspective view of a moving body of the electric circuit breaker according to Embodiment 1 of the present invention, (b) is a perspective view of the moving body, and (c) is a CC cross-sectional view.
- FIG. 1(a) is a perspective view of a portion to be cut of the electric circuit breaker according to Embodiment 1 of the present invention, and FIG. 1(b) is a cross-sectional view taken along line DD.
- 1 is an exploded perspective view of an electric circuit breaker according to Embodiment 1 of the present invention; FIG. It is an EE sectional view in the state where the electric circuit breaking device concerning Embodiment 1 of this invention was assembled.
- FIG. 6 is a cross-sectional view taken along line FF of the assembled electric circuit breaking device shown in FIG. 5 ;
- FIG. 7 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 6;
- FIG. 8 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 7;
- FIG. 7 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 6;
- FIG. 7 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 6;
- FIG. 7 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG.
- FIG. 6 is an overall perspective view of a lower housing of an electric circuit breaker according to Embodiment 2 of the present invention, (b) is a plan view of the lower housing, and (c) is a GG sectional view. .
- Fig. 2 is an exploded perspective view of an electric circuit breaker according to Embodiment 2 of the present invention;
- FIG. 15 is a cross-sectional view taken along the line HH of the assembled electric circuit breaking device shown in FIG. 14;
- FIG. 16 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG.
- FIG. 15 is an overall perspective view of a lower housing of an electric circuit breaker according to Embodiment 3 of the present invention, (b) is a plan view of the lower housing, and (c) is a cross-sectional view taken along line II. .
- FIG. 7 is an exploded perspective view of an electric circuit breaker according to Embodiment 3 of the present invention;
- FIG. 19 is a JJ cross-sectional view of the assembled electric circuit breaking device shown in FIG. 18 ;
- FIG. 19 is a cross-sectional view taken along line KK of the assembled electric circuit breaking device shown in FIG. 18 ;
- FIG. 20 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 19;
- FIG. 21 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 20;
- FIG. 20 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 19;
- FIG. 20 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 19;
- FIG. 20 is a cross-sectional view showing a state in which the moving body has moved from the state shown in FIG. 19;
- It is the whole perspective view which decomposed
- 26. is a sectional view taken along line SS of FIG.
- FIG. 26 is a sectional view taken along line LL of FIG. 27(a) is a cross-sectional view showing how the blocking body has moved from the state shown in FIG. 27(b), and (b) is a cross-sectional view showing how the moving body has moved from the state shown in FIG. be. It is sectional drawing which shows a mode that the moving body moved from the state shown in FIG.27(b). It is the whole perspective view which decomposed
- 30. (a) is a cross-sectional view along NN in FIG. 30, and (b) is a cross-sectional view along MM in FIG.
- FIG. 31(a) is a cross-sectional view showing how the blocking body has moved from the state shown in FIG. 31(b), and (b) is a cross-sectional view showing how the moving body has moved from the state shown in FIG. be. It is sectional drawing which shows a mode that the moving body moved from the state shown in FIG.31(b).
- FIG. 1 shows a lower housing 100 that constitutes a housing 300 of an electric circuit breaker according to Embodiment 1 of the present invention.
- 1(a) is an overall perspective view of the lower housing 100
- FIG. 1(b) is a plan view of the lower housing 100
- FIG. 1(c) is a sectional view taken along line AA.
- the lower housing 100 is a substantially quadrangular prism made of an insulating material such as synthetic resin, and has a hollow lower accommodating portion 110 inside.
- the lower accommodating portion 110 extends from the upper surface 120 toward the lower surface 130 of the lower housing 100, and is configured to accommodate a moving body 500, which will be described later.
- the inner surface 111 of the lower accommodating portion 110 is a smooth surface so that the moving body 500 can slide vertically inside.
- a part of the upper surface 120 is provided with a mounting portion 113 that is recessed in accordance with the shape of the base piece 430 so that the base piece 430 of the section to be cut 400 to be described later can be placed.
- the mounting portions 113 are arranged on both sides of the lower housing portion 110 so as to face each other, and the mounting portions 113 support the cut portion 400 extending linearly on both sides. Further, the mounting portion 113 is provided with a claw 114 that engages with a portion of the base portion piece 430 of the mounted portion to be cut 400 to fix the portion to be cut 400 so as not to shift. Further, connecting holes B1 are formed in the four corners of the upper surface 120 of the lower housing 100, and the connecting holes B1 are arranged so as to vertically match the connecting holes B2 of the upper housing 200, which will be described later.
- FIG. 2 shows an upper housing 200 that constitutes the housing 300 according to the first embodiment of the present invention.
- 2A is an overall perspective view of the upper housing 200
- FIG. 2B is a plan view of the upper housing 200
- FIG. 2A is an overall perspective view of the upper housing 200
- FIG. 2B is a plan view of the upper housing 200
- FIG. 2A is an overall perspective view of the upper housing 200
- FIG. 2B is a plan view of the upper housing 200
- the upper housing 200 is a substantially quadrangular prism made of an insulating material such as synthetic resin. be.
- a hollow upper accommodating portion 210 is provided inside, and this upper accommodating portion 210 extends from the lower surface 230 toward the upper surface 220 of the upper housing 200 and is configured to accommodate a moving body 500 described later.
- the inner surface 211 of the upper accommodation portion 210 is a smooth surface so that the moving body 500 can slide vertically inside.
- the upper housing portion 210 is arranged above and below the lower housing portion 110 of the lower housing 100 to form a linearly extending housing portion 310 . You can move up and down inside.
- a portion of the lower surface 230 is provided with an insertion portion 213 recessed in accordance with the shape of the base piece 430 so that the base piece 430 of the section to be cut 400 described later can be inserted.
- the insertion portions 213 are arranged so as to face each other on both sides of the upper accommodation portion 210 and are arranged at positions corresponding to the mounting portions 113 of the lower housing 100 . Therefore, the insertion portion 213 is fitted to the base piece 430 of the cut portion 400 placed on the placement portion 113 of the lower housing 100 from above.
- a power source housing portion 221 in which the first power source P is housed is formed in a portion of the upper housing 200 on the side of the upper surface 220 .
- the power source housing portion 221 communicates with the upper end side of the upper housing portion 210 .
- power such as air pressure generated from the first power source P housed in the power source housing portion 221 is transmitted to the moving body 500 in the upper housing portion 210 to move the moving body 500.
- the lower housing 100 and the upper housing 200 are generally square prisms made of synthetic resin, they are not limited to this, and can be used as long as they have high insulation and strength enough to withstand use. Other materials may be used in any shape.
- the upper housing 200 is attached with a restricting means 800 made of an insulating material such as synthetic resin.
- the restricting means 800 includes a housing portion 820 that slidably accommodates the restricting body 810 and a second power source 830 for moving the restricting body 810 .
- the restricting body 810 has a distal end portion 812 and a bar-shaped distal end portion 811 extending from the distal end portion 812 in an elongated shape.
- the upper housing 200 is provided with a through-hole 250 for communicating the upper accommodating portion 210 inside and the accommodating portion 820 of the restricting means 800 . It is formed so that the 811 can be inserted.
- the restricting body 810 in the housing portion 820 is transmitted to the restricting body 810 in the housing portion 820 and directed toward the upper housing portion 210 of the upper housing 200. is used to move the regulating body 810 . Then, the distal end portion 811 of the moved restricting body 810 is inserted through the through hole 250 and moved into the upper accommodation portion 210 of the upper housing 200 .
- the restricting means 800 is attached to the upper housing 200 , it is not limited to this, and can be attached to any part of the housing 300 as long as it is part of the housing 300 .
- FIG. 3 shows a moving body 500 according to Embodiment 1 of the present invention.
- 3(a) is an exploded perspective view of the moving body 500
- FIG. 3(b) is a perspective view of the moving body 500
- FIG. 3(c) is a sectional view taken along line CC.
- the moving body 500 is made of an insulating material such as synthetic resin, and has a substantially cylindrical main body 510 on the upper end side, a flat rectangular sliding part 520 at the center, and a sliding part 520 on the lower end side. and a protruding portion 530 protruding downward.
- a recessed portion 511 is provided at the upper end of the main body 510, and the recessed portion 511 is a portion facing the first power source P.
- the sliding portion 520 has a shape corresponding to the shape of the inner surface of the housing portion 310 , and by sliding the sliding portion 520 on the inner surface of the housing portion 310 , the movable body 500 is positioned along the inside of the housing portion 310 .
- a portion of the sliding portion 520 has a stepped shape, and a contact portion 521 that can contact a portion of the restricting body 810 of the restricting means 800 is provided.
- a groove 514 is formed in a part of the outer circumference of the main body 510 , and an O-ring 515 (an elastically deformable synthetic resin ring) is fitted in the groove 514 . Therefore, as will be described later, the air pressure caused by the explosion of the first power source P does not leak from the space formed by the recessed portion 511 .
- Two plate-like electrode portions 540 and 550 are fixed to both sides of the projecting portion 530 .
- the pair of electrode portions (540, 550) are connected to terminals of a fuse function portion, which will be described later, and are made of a metal conductor such as copper so as to be electrically connected to a portion of the cut portion 400.
- the electrode portions 540 and 550 are fixed to both sides of the projecting portion 530 formed of an insulator, the electrode portions 540 and 550 are not electrically connected and are independent. It has become.
- the moving body 500 is provided with a plate-shaped insulator 560 made of synthetic resin, ceramics, or the like, on the tip side of the electrode section 540 and the electrode section 550 .
- the moving body 500 is made of synthetic resin, it is not limited to this, and may be made of any other material in any shape as long as it has high insulating properties and is strong enough to withstand use.
- the pair of electrode portions 540 and 550 are configured in a plate shape, but are not limited to this, and may be of any shape as long as they can be electrically connected to a part of the portion to be cut 400 . .
- FIG. 4 shows a portion to be cut 400 that constitutes a part of the electric circuit to be interrupted by the electric circuit breaker 600 according to Embodiment 1 of the present invention.
- 4(a) is a perspective view of the portion 400 to be cut
- FIG. 4(b) is a sectional view taken along line DD.
- the part to be cut 400 is entirely made of a conductor made of metal such as copper for electrical connection with an electric circuit. and a cutting piece 420 located at the .
- a connection hole 410 is formed at the end of the base piece 430 to be used for connection with an electric circuit.
- a linear cut is made so as to traverse the width direction of the cut portion 400 so that the cut piece 420 can be easily cut from the base piece 430. 424 is provided.
- the cut portion 400 is not limited to the shape shown in FIG. , may be of any shape.
- the cross-sectional area of a portion of the cut piece 420 is minimized by the notch 424 to facilitate cutting. can be changed as appropriate.
- FIG. 5 shows an exploded perspective view of the electric circuit breaker 600. As shown in FIG. 5
- the abutment base 112 made of an insulator is fixed to the bottom of the lower accommodating portion 110 of the lower housing 100.
- the base piece 430 of the section to be cut 400 is placed on the mounting section 113 of the lower housing 100, and the section to be cut 400 is moved so that the cut piece 420 crosses the lower accommodating section 110 of the lower housing 100. to place.
- the upper housing 200 is fitted over the lower housing 100 so that the main body 510 side of the moving body 500 is inserted into the upper accommodating portion 210 of the upper housing 200 .
- the insertion portion 213 of the upper housing 200 is fitted to the base piece 430 of the cut portion 400 .
- the housing 300 composed of the lower housing 100 and the upper housing 200 accommodates the section to be cut 400 and the moving body 500 therein. It can be assembled as it is.
- a first power source P is attached to the power source housing portion 221 of the upper housing 200 , and part of the first power source P is housed in the recessed portion 511 of the moving body 500 . Further, when it is detected that an abnormal current has flowed through the electric circuit, an abnormal signal is input to the first power source P from an external device. Then, for example, the gunpowder inside the first power source P is exploded, and the air pressure generated by the explosion instantly pushes the moving body 500 out of the housing section 310 to move it.
- the first power source P is not limited to a power source using gunpowder, and may be another known power source as long as it generates power to move the moving body 500 .
- a restriction means 800 is attached to the upper housing 200 .
- a portion of the restricting body 810 is configured to be movable into the upper accommodating portion 210 of the upper housing 200 by the second power source 830 .
- Second power source 830 is not limited to a power source using gunpowder as long as it generates power to move regulation body 810, and other known power sources may be used.
- the electric circuit breaker 600 includes a fuse function section 700 .
- This fuse function unit 700 includes a fuse element 720 made of a conductive metal such as copper or its alloy in a hollow insulating casing 710 . Material 730 is filled. Terminals 750 on both sides of the fuse element 720 are electrically connected to the pair of electrode portions 540 and 550 by connecting members 760 such as electric wires.
- the fuse element 720 also has a fusing portion 740 between the terminals 750.
- the fusing portion 740 is a locally narrowed portion of the fuse element 720 and should be broken by the electric circuit breaker. It is configured to be able to cut off the current by generating heat and fusing when current flows.
- the arc-extinguishing material 730 is a granular arc-extinguishing material made of silica sand or the like, or a gaseous arc-extinguishing material made of nitrogen gas or the like. It is configured to extinguish arcs.
- the fuse function unit 700 can use an existing fuse in which an arc-extinguishing material and a fuse element are enclosed in a casing, which are conventionally known, and can be used to cut current and voltage to be interrupted by the electric circuit breaker. A fuse having an arc-extinguishing performance corresponding to the requirement can be appropriately adopted. Note that the fuse function part 700 can be attached to an arbitrary location in the housing 300. By attaching the fuse function part 700 to the housing 300, the impact caused by the movement of the moving body 500 is less likely to affect the fuse function part 700. Not easy to damage.
- FIG. 6 is an EE cross-sectional view of the assembled electric circuit breaker 600 shown in FIG. 5, and FIG. 7 is an FF cross-sectional view.
- the moving body 500 is housed inside a housing section 310 composed of a lower housing section 110 and an upper housing section 210 that are linearly arranged.
- the receiving portion 310 extends from a first end 320 of the housing 300 to a second end 330 opposite the first end 320 . Since the moving body 500 is arranged on the first end portion 320 side where the first power source P is arranged, the second end portion 330 side of the accommodating portion 310 is hollow. Therefore, as will be described later, the moving body 500 can move toward the second end portion 330 while cutting the cut piece 420 .
- the air pressure caused by the explosion of the gunpowder in the first power source P is directed toward the upper end side of the moving body 500 as described later. is transmitted.
- the assembled electrical circuit breaker 600 is installed in an electrical circuit to be protected and used. Specifically, the base piece 430 of the section to be cut 400 is connected to a part of the electric circuit so that the section to be cut 400 constitutes a part of the electric circuit. Insulator 560 extends along cut piece 420 and is spaced apart from cut piece 420 . Under normal conditions (that is, when no abnormal current is flowing), the base piece 430 of the section to be cut 400 and the cut piece 420 are not cut and are physically and electrically connected, so the current I1 flows through the base piece 430 and the cutting piece 420 of the section to be cut 400 in the electric circuit. Further, as shown in FIG.
- the distal end portion 811 of the restricting body 810 of the restricting means 800 is inserted into the through hole 250 of the housing 300 but does not protrude into the accommodating portion 310 . Therefore, normally, a part of the restricting body 810 of the restricting means 800 does not come into contact with the contact portion 521 of the moving body 500 , and the restricting means 800 does not restrict the movement of the moving body 500 .
- a device S for detecting an abnormal current in the electric circuit is connected to the electric circuit to be protected.
- the abnormal current reaches a predetermined value (for example, 1000 to 2000 A [amperes]). It is determined whether or not it belongs to a lower, relatively low current region. Then, when the device S determines that the abnormal current belongs to a relatively low current range lower than a predetermined value, the device S inputs the abnormal signal X1 to the second power source 830 . After a predetermined period of time has elapsed, the device S inputs an abnormality signal X2 to the first power source P.
- a predetermined value for example, 1000 to 2000 A [amperes]
- the predetermined time is the time until the tip portion 811 of the restricting body 810 protrudes into the accommodating portion 310 of the housing 300 by the second power source 830 .
- the device S determines that the detected abnormal current does not belong to a relatively low current range lower than a predetermined value and belongs to a relatively high current range higher than a predetermined value, an abnormal signal is sent to the second power source 830.
- the abnormality signal X2 is input only to the first power source P without inputting X1.
- a pair of the electrode portion 540 and the electrode portion 550 are arranged on the lower end side of the movable body 500 so as to face the portion to be cut 400 , and the insulator 560 separated from the portion to be cut 400 intervening between Therefore, since the pair of electrodes 540 and 550 are not physically or electrically connected to the section to be cut 400 , the current flowing in the electric circuit passes through the electrodes 540 and 550 . fuse function unit 700. As a result, it is possible to prevent the current in the electric circuit from constantly flowing through the fuse function unit 700, and to prevent heat generation and deterioration of the fuse function unit 700.
- the electric circuit breaker 600 can effectively and quickly extinguish an arc generated when the electric circuit is interrupted by guiding it to the fuse function unit 700.
- the area around the cut piece 420) does not contain an arc-extinguishing material for extinguishing the arc.
- FIG. 8 is a cross-sectional view showing how the moving body 500 has moved from the state shown in FIG. 6, and
- FIG. 9 is a cross-sectional view showing how the moving body 500 has moved from the state shown in FIG.
- the device S detects an abnormal current in the electric circuit, it is assumed that the abnormal current belongs to a relatively low current range lower than a predetermined value (for example, 1000 to 2000 A [amperes]).
- the device S inputs the abnormality signal X1 to the second power source 830 .
- the explosive contained in the second power source 830 explodes, and the air pressure generated by the explosion is transmitted to the end portion 812 of the regulator 810 .
- the restricting body 810 is vigorously blown off toward the accommodating portion 310 of the housing 300 and instantaneously moves within the accommodating portion 820 of the restricting means 800 toward the moving object 500 .
- the distal end portion 811 of the restricting body 810 protrudes into the accommodating portion 310 of the housing 300 .
- the device S inputs an abnormality signal X2 to the first power source P.
- the explosive in the first power source P explodes, and the air pressure generated by the explosion is transmitted to the recessed portion 511 on the upper end side of the moving body 500 . Due to this air pressure, the moving body 500 is vigorously blown away from the first end portion 320 toward the second end portion 330 , and instantaneously moves inside the housing portion 310 toward the second end portion 330 .
- the cut piece 420 is strongly pushed downward by the insulator 560 of the moving body 500, and the cut piece 420 is cut near the joint between the cut piece 420 and the base piece 430. , and are physically separated from the base piece 430 . Therefore, the energized state of the base pieces 430 on both sides is immediately interrupted, and an overcurrent can be prevented from flowing through the electric circuit. Since the abnormal current belongs to a relatively low current range lower than a predetermined value, even if the distance between the separated cut piece 420 and the base piece 430B is short, the arc discharge will occur in the insulator interposed between the base pieces 430. 560 prevents this from occurring.
- the abutting portion 521 of the moving body 500 abuts on the distal end portion 811 of the restricting body 810 protruding into the housing portion 310, so that the moving body 500 is further moved to the second end portion. It is not possible to move toward 330. Therefore, the electrode portion 540 and the electrode portion 550 are not in contact with the base piece 430 , and the current flowing through the base piece 430 does not flow to the fuse function portion 700 via the electrode portion 540 and the electrode portion 550 .
- the restricting means 800 moves the moving body 500 so that a part of the section to be cut 400 does not come into contact with the electrode section. It regulates.
- the restriction means 800 restricts the movement of the moving body 500 by causing the distal end portion 811 to contact the contact part 521 of the moving body 500, but the restriction means 800 is not limited to this. Any configuration may be used as long as the movement of 500 can be regulated.
- FIGS. 10 to 12 are cross-sectional views showing how the moving body 500 has moved from the state shown in FIG.
- the device S detects an abnormal current in an electric circuit, it is assumed that the abnormal current does not belong to a relatively low current range lower than a predetermined value but belongs to a relatively high current range higher than a predetermined value. .
- the device S inputs the abnormality signal X2 only to the first power source P without inputting the abnormality signal X1 to the second power source 830 .
- the gunpowder in the first power source P explodes, and the moving body 500 instantly moves inside the housing portion 310 toward the second end portion 330 .
- the moving body 500 moves toward the second end portion 330, and the insulator 560 of the moving body 500 pushes the cut piece 420 strongly downward.
- the cutting piece 420 and the base piece 430 are cut in the vicinity of the connection point and physically separated from the base piece 430 .
- the restricting means 800 since the device S does not input the abnormality signal X1 to the second power source 830, the restricting means 800 does not operate, and the tip portion 811 of the restricting body 810 does not protrude into the accommodating portion 310 of the housing 300. . Therefore, the movement of the moving body 500 is not restricted by the restricting means 800 .
- the current I1 (accident current) flowing through the electrical circuit is interrupted by the fuse function part. Since it is guided to 700, it is possible to prevent arcing from continuing to occur between the cut piece 420 and the base piece 430 that have been separated. 10 and 11, the arc discharge that occurs immediately after the cut piece 420 is separated from the base piece 430 has less energy because part of the current I1 is guided to the fuse function part 700. Disappear instantly. Therefore, even if an arc discharge is instantaneously caused immediately after the cutting piece 420 is separated from the base piece 430, other parts of the electric circuit breaker 600 are not affected, and there is no safety problem.
- the current I1 induced to the fuse functioning portion 700 quickly melts the fusing portion 740 of the fuse functioning portion 700, thereby quickly interrupting the current flowing through the electric circuit. Furthermore, after the fusing portion 740 is blown, an arc is generated between the terminals 750 of the fuse function portion 700 due to the voltage applied to the base pieces 430 on both sides connected to the electric circuit. The arc extinguishing material 730 in 700 quickly and effectively extinguishes the arc.
- the base pieces 430 on both sides of the section to be cut 400 are cut as shown in FIGS.
- the section to be cut 400 is connected to the fuse function section 700 through a pair of electrode sections 540 and 550, and thereafter, as the moving body 500 moves, As shown in FIG. 12, the cut piece 420 is separated from the base piece 430 to extinguish the arc discharge so that it does not continue any longer, and the base pieces 430 on both sides of the cut portion 400 are energized through the cut piece 420. As shown in FIG. state is blocked.
- the cut portion 400 and the fuse function portion 700 are connected before the energized state of the cut portion 400 is completely interrupted and the arc discharge continuously occurs between the base pieces 430 on both sides. Since the state is ensured, an arc caused by a relatively high fault current can be reliably induced to the fuse function unit 700 and extinguished within the fuse function unit 700 . As a result, it is possible to prevent the electric circuit breaker 600 from being damaged by the arc caused by the accident current continuing to occur between the base pieces 430 in the housing 300, so that the electric circuit can be safely interrupted.
- the electrode portions 540 and 550 are directed toward the second end portion 330 . Since the state of being in contact with part of the part to be cut 400 is always maintained while moving with the fuse function part 700, the state of the part to be cut 400 being connected to the fuse function part 700 is also always maintained.
- the cut portion 400 and the fuse function are connected as shown in FIGS. 700, cut the cut pieces 420 between the base pieces 430 on both sides of the cut portion 400 to immediately cut off the energized state of the base pieces 430 on both sides, and prevent overcurrent in the electric circuit. prevents it from flowing. Therefore, as in the conventional art, when the current belongs to a relatively low current range, the fusing portion 740 of the fuse function portion 700 does not blow and the current cannot be cut off, or it takes a relatively long time to cut off the current. This solves the problem that the overcurrent that flows through the circuit cannot be cut off immediately.
- the electric circuit breaker 600 of the present invention is equipped with quick-breaking properties in a wide range of currents, not only at relatively high currents but also at relatively low currents.
- FIG. 13(a) is an overall perspective view of the lower housing 100A
- FIG. 13(b) is a plan view of the lower housing 100A
- FIG. 3(c) is a sectional view taken along line GG.
- a restricting means 800A made of an insulating material such as synthetic resin is attached to the lower housing 100A.
- the restricting means 800A includes an accommodating portion 820A that slidably accommodates the restricting body 810A, and a second power source 830A for moving the restricting body 810A.
- the regulating body 810A has a substantially rectangular parallelepiped shape, has a distal end portion 812A and a distal end portion 811A, and has a space 813A inside which can accommodate a part of the contact base 112A, which will be described later.
- the lower housing 100A is provided with a through hole 150A for communicating the inner lower housing portion 110A and the housing portion 820A of the restricting means 800A, and the restricting body 810A of the restricting means 800A is inserted through the through hole 150A. formed as possible.
- power such as air pressure generated from the second power source 830A housed in the housing portion 820A is transmitted to the regulating body 810A in the housing portion 820A, and the moved regulating body 810A moves through the through hole 150A. , and moves to the lower accommodating portion 110A of the lower housing 100A.
- the restricting means 800A is attached to the lower housing 100A, it is not limited to this, and can be attached to any part of the housing 300 as long as it is a part thereof.
- FIG. 14 shows an exploded perspective view of the electric circuit breaker 600A.
- a substantially T-shaped abutment base 112A made of an insulator is fixed to the bottom of the lower accommodating portion 110A of the lower housing 100A.
- the section to be cut 400A is arranged so that the cut piece 420A crosses the lower accommodating section 110A of the lower housing 100A.
- the upper housing 200A is fitted over the lower housing 100A so that the main body 510A side of the moving body 500A is inserted into the upper accommodating portion 210A of the upper housing 200A.
- the housing 300A composed of the lower housing 100A and the upper housing 200A is assembled with the cut portion 400A and the moving body 500A accommodated therein.
- a first power source PA is attached to the power source housing portion 221A of the upper housing 200A, and a portion of the first power source PA is housed in the recessed portion 511A of the moving body 500A.
- a restricting means 800A is attached to the lower housing 100A.
- a portion of the restricting body 810A is configured to be movable into the lower accommodating portion 110A of the lower housing 100A by the second power source 830A.
- the electric circuit breaker 600A includes a fuse function section 700A. Terminals 750A on both sides of the fuse element 720A are electrically connected to a pair of electrode portions 540A and 550A by connecting members 760A such as electric wires. Note that the fuse function portion 700A can be attached to any location on the housing 300A.
- FIG. 15 is a cross-sectional view taken along the line H--H in which the electric circuit breaker 600A shown in FIG. 14 is assembled.
- the assembled and completed electric circuit breaker 600A is installed in an electric circuit to be protected and used.
- the base piece 430A of the section to be cut 400A is connected to a part of the electric circuit so that the section to be cut 400A constitutes a part of the electric circuit.
- An insulator 560A provided at the lower end of the moving body 500A extends along the cut piece 420A and is spaced apart from the cut piece 420A. Normally, the base piece 430A of the section to be cut 400A and the cut piece 420A are not cut, but are physically and electrically connected. 420A through the electrical circuit.
- the distal end portion 811A side of the restricting body 810A of the restricting means 800A is inserted into the through hole 150A of the housing 300A, but does not protrude into the accommodating portion 310A. Therefore, normally, a part of the restricting body 810A of the restricting means 800A does not protrude into the housing portion 310A, and the restricting means 800A does not restrict the movement of the moving body 500A.
- a device SA for detecting an abnormal current in the electric circuit is connected to the electric circuit to be protected.
- the device SA determines that the abnormal current belongs to a relatively low current range lower than a predetermined value
- the device SA inputs an abnormal signal X1A to the second power source 830A.
- the device SA inputs the abnormality signal X2A to the first power source PA.
- the predetermined time is a period of time until the second power source 830A causes the restricting body 810A to protrude into the accommodating portion 310A of the housing 300A and the restricting means 800A can restrict the movement of the moving body 500A. It's time.
- an abnormality signal is sent to the second power source 830A.
- the abnormality signal X2A is input only to the first power source PA without inputting X1A.
- 16 is a cross-sectional view showing a state in which the moving body 500A has moved from the state shown in FIG.
- device SA detects an abnormal current in an electric circuit
- the abnormal current belongs to a relatively low current range lower than a predetermined value (for example, 1000 to 2000 A [amperes]).
- device SA inputs abnormality signal X1A to second power source 830A.
- the explosive contained in the second power source 830A explodes, and the air pressure generated by the explosion is transmitted to the end portion 812A of the regulator 810A.
- the restricting body 810A is vigorously blown off toward the accommodating portion 310A of the housing 300A and moves inside the accommodating portion 820A.
- the regulating body 810A protrudes into the housing portion 310A of the housing 300A and enters into the lower side of the moving body 500.
- the abutment base 112A arranged in the accommodation portion 310A is accommodated in the space 813A of the regulation body 810A, so that it does not interfere with the movement of the regulation body 810A.
- the device SA inputs the abnormality signal X2A to the first power source PA.
- the gunpowder in the first power source PA explodes, and the air pressure generated by the explosion blows the moving body 500A from the first end 320A toward the second end 330A with great force, moving the inside of the housing portion 310A to the second end. It instantly moves toward the second end 330A.
- the cut piece 420A is strongly pushed downward by the insulator 560A of the moving body 500A, and the cut piece 420A is cut near the joint between the cut piece 420A and the base piece 430A, and is physically separated from the base piece 430A. state. Therefore, the energized state of the base pieces 430A on both sides is immediately interrupted, and an overcurrent can be prevented from flowing through the electric circuit. Since the abnormal current belongs to a relatively low current range lower than a predetermined value, arc discharge does not occur even if the distance between the separated cut piece 420A and the base piece 430A is short. The intervening insulator 560A ensures that arcing does not occur.
- the moving body 500A moves further toward the second end portion 330A. cannot move.
- the electrode section is not in contact with the base piece 430A. It does not flow to the functional unit 700A.
- the restriction body 810A prevents the portion to be cut 400A and the electrode portion from coming into contact with each other so that the portion to be cut 400A and the fuse function portion 700A are not connected. It regulates.
- the restricting body 810A of the restricting means 800A contacts the moving body 500A so as to slip under the moving body 500A, thereby restricting the movement of the moving body 500A. Therefore, the restricting body 810A of the restricting means 800A can firmly and stably receive the lower side of the moving body 500A, and the structure of the restricting body 810A of the restricting means 800A is simplified.
- the device SA detects an abnormal current in the electric circuit, it determines that the abnormal current does not belong to a relatively low current range lower than a predetermined value but belongs to a relatively high current range higher than a predetermined value.
- the device SA inputs the abnormality signal X2A only to the first power source PA without inputting the abnormality signal X1A to the second power source 830A. Since the apparatus SA does not input the abnormality signal X1A to the second power source 830A, the restricting means 800A does not operate, and the restricting body 810A does not protrude into the accommodating portion 310A of the housing 300A. Movement of 500A is not restricted by restricting means 800A.
- the abnormal signal X2A causes the gunpowder in the first power source P to explode, and the moving body 500A instantly moves in the storage section 310A toward the second end section 330A.
- the subsequent operation of the electric circuit breaker 600A to break the electric circuit is the same as the operation mode of the electric circuit breaker 600 according to the first embodiment shown in FIGS. As a result, it is possible to prevent the electric circuit breaker 600A from being damaged by the arc due to the accident current continuing to occur between the base pieces 430A within the housing 300A, and to safely break the electric circuit.
- FIG. 17(a) is an overall perspective view of the lower housing 100B
- FIG. 17(b) is a plan view of the lower housing 100B
- FIG. 17(c) is a sectional view taken along line II.
- a restricting means 800B made of an insulating material such as synthetic resin is attached to the lower housing 100B.
- the restricting means 800B includes an accommodating portion 820B that slidably accommodates the restricting body 810B, and a second power source 830B for moving the restricting body 810B.
- the restricting body 810B has a substantially rectangular parallelepiped shape with a pointed upper end 814B, and includes a distal end portion 812B and a distal end portion 811B. 813B.
- the lower housing 100B is provided with a through-hole 150B that communicates between the inner lower accommodating portion 110B and the accommodating portion 820B of the restricting means 800B. formed as possible.
- FIG. 18 shows an exploded perspective view of the electric circuit breaker 600B.
- the contact base 112B which is made of an insulating material and has a sharp tip 118B, is fixed to the bottom of the lower accommodating portion 110B of the lower housing 100B.
- the cut portion 400B is arranged so that the cut piece 420B crosses the lower housing portion 110B of the lower housing 100B.
- the upper housing 200B is fitted over the lower housing 100B so that the main body 510B side of the moving body 500B is inserted into the upper accommodating portion 210B of the upper housing 200B.
- the housing 300B composed of the lower housing 100B and the upper housing 200B is assembled with the cut portion 400B and the moving body 500B accommodated therein.
- a first power source PB is attached to the power source storage portion 221B of the upper housing 200B, and part of the first power source PB is stored in the recessed portion 511B of the moving body 500B.
- a restricting means 800B is attached to the lower housing 100B.
- a part of the regulating body 810B is configured to be movable into the lower accommodating portion 110B of the lower housing 100B by the second power source 830B.
- the electric circuit breaker 600B includes a fuse function section 700B. Terminals 750B on both sides of the fuse element 720B are electrically connected to a pair of electrode portions 540B and 550B arranged in the lower accommodating portion 110B of the lower housing 100B by connecting members 760B such as electric wires. ing. Note that the fuse function portion 700B can be attached to any location on the housing 300B.
- FIG. 19 is a JJ cross-sectional view of the assembled electric circuit breaker 600B shown in FIG. 18, and FIG. It is a K sectional view.
- the assembled and completed electric circuit breaker 600B is installed in an electric circuit to be protected and used.
- the base piece 430B of the section to be cut 400B is connected to a part of the electric circuit so that the section to be cut 400B constitutes a part of the electric circuit.
- the electrode portion 540B and the electrode portion 550B are arranged on the side of the second end portion 330B in the accommodating portion 310B of the housing 300B, and are positioned on the opposite side of the moving body 500B across the cut piece 420B.
- the fuse function portion 700B is fixed at an arbitrary position on the housing 300B.
- a pair of conductors 570B made of metal such as copper are provided on the tip side of the moving body 500B so as to face the cut piece 420B.
- the base piece 430B of the cut portion 400B and the cut piece 420B are not cut and are physically and electrically connected. and cut piece 420B in the electrical circuit.
- a pair of the electrode portion 540B and the electrode portion 550B are arranged below the cut piece 420B and away from the cut piece 420B. Therefore, since the pair of electrode portions 540B and 550B are not physically or electrically connected to the cut portion 400B, the current flowing in the electric circuit passes through the electrode portions 540B and 550B. Therefore, it does not flow to the fuse function unit 700B.
- the conductors 570B on both sides are physically separate from each other and are not electrically connected. Also, the conductor 570B is arranged above the cut piece 420B and away from the cut piece 420B.
- the distal end portion 811B side of the restricting body 810B of the restricting means 800B is inserted into the through hole 150B of the housing 300B, but does not protrude into the accommodating portion 310B. Therefore, normally, a part of the restricting body 810B of the restricting means 800B does not protrude into the housing portion 310B, and the restricting means 800B does not restrict the movement of the moving body 500B.
- a device SB for detecting an abnormal current in the electric circuit is connected to the electric circuit to be protected.
- the device SB determines that the abnormal current belongs to a relatively low current range lower than a predetermined value
- the device SB inputs an abnormal signal X1B to the second power source 830B.
- the device SB inputs an abnormality signal X2B to the first power source PB.
- the predetermined time is the time until the second power source 830B protrudes the restricting body 810B into the accommodating portion 310B of the housing 300B.
- an abnormality signal is sent to the second power source 830B.
- the abnormality signal X2B is input only to the first power source PB without inputting X1B.
- FIG. 21 is a cross-sectional view showing how the moving body 500B has moved from the state shown in FIG. 19, and FIG. 22 is a cross-sectional view showing how the moving body 500B has moved from the state shown in FIG.
- the device SB detects an abnormal current in the electric circuit, it determines that the abnormal current belongs to a relatively low current range lower than a predetermined value (for example, 1000 to 2000 A [amperes]).
- a predetermined value for example, 1000 to 2000 A [amperes]
- device SB inputs abnormality signal X1B to second power source 830B.
- the explosive contained in the second power source 830B explodes, and the air pressure generated by the explosion is transmitted to the end portion 812B of the regulator 810B.
- the restricting body 810B is vigorously blown off toward the accommodating portion 310B of the housing 300B and moves inside the accommodating portion 820B.
- the regulating body 810B protrudes into the housing portion 310B of the housing 300B and is in a state of getting under the moving body 500B.
- the abutment table 112B arranged in the accommodation portion 310B is accommodated in the space 813B of the regulation body 810B, so that it does not interfere with the movement of the regulation body 810B.
- the height L1 of the restricting body 810B is higher than the height L2 of the contact base 112B. Therefore, as will be described later, when the moving body 500B abuts against the tall restricting body 810B, it is possible to further restrict the amount of movement of the moving body 500B downward toward the second end portion 330B.
- the device SB inputs the abnormality signal X2B to the first power source PB.
- the explosive in the first power source PB explodes, and the air pressure generated by the explosion blows the moving body 500B vigorously from the first end 320B toward the second end 330B, moving the inside of the housing 310B to the second end. It instantly moves toward the second end 330B.
- the cut piece 420B is strongly pushed downward by the moving body 500B. Then, the cut piece 420B is bent into a substantially V-shape by the sharp upper end 814B of the regulating body 810B, and is cut near the connection point between the cut piece 420B and the base piece 430B to physically separate from the base piece 430B. state. Therefore, the energized state of the base pieces 430B on both sides is immediately interrupted, and an overcurrent can be prevented from flowing through the electric circuit. Since the abnormal current belongs to a relatively low current range lower than a predetermined value, even if the distance between the separated cut piece 420B and the base piece 430B is short, an arc will not occur through the cut piece 420B. ing.
- the moving body 500B since the projecting portion 530B of the moving body 500B abuts the upper end 814B of the restricting body 810B projecting into the housing portion 310B, the moving body 500B cannot move further toward the second end portion 330B. Then, the conductor 570B of the moving body 500B is not in contact with the electrode section 540B and the electrode section 550B. Note that the cut piece 420B that has been cut is also in a state where it is not in contact with the electrode portion 540B and the electrode portion 550B.
- the restriction body 810B causes the portion to be cut 400B and the fuse function portion 700B to be in a state in which they are not connected. It regulates.
- FIGS. 23 to 25 are cross-sectional views showing how the moving body 500B has moved from the state shown in FIG.
- the device SB detects an abnormal current in the electric circuit, it determines that the abnormal current does not belong to a relatively low current range lower than a predetermined value and belongs to a relatively high current range higher than a predetermined value.
- the device SB inputs the abnormality signal X2B only to the first power source PB without inputting the abnormality signal X1B to the second power source 830B.
- the explosive in the first power source PB explodes, and the moving body 500B instantaneously moves inside the housing portion 310B toward the second end portion 330B. Then, the pair of conductors 570B arranged on the lower end side of the moving body 500B come into contact with the cut piece 420B of the cut portion 400B. Then, when the moving body 500B moves further toward the second end portion 330B, as shown in FIG. 420B is cut near the joint between cut piece 420B and base piece 430B, and is physically separated from base piece 430B. Since the conductor 570B is in contact with the cut piece 420B and the base piece 430B, the cut piece 420B is physically separated from the base piece 430B. The piece 430B remains energized through the cut piece 420B.
- the fuse function portion 700B is in a state of being electrically connected to a portion of the cut portion 400B through the conductor 570B and the pair of electrode portions (540B, 550B), and the portion I2B of the current flowing through the electric circuit is fused. It flows to the function part 700B.
- the cut piece 420B is in contact with the conductor 570B, so it is electrically connected to the base piece 430B through the conductor 570B. That is, part of the cut portion 400B is connected to the fuse function portion 700B while the base pieces 430B on both sides of the cut portion 400B remain energized through the cut pieces 420B.
- cut piece 420B is strongly pushed downward by projecting portion 530B of moving body 500B and conductor 570B.
- the cut piece 420B is bent into a substantially V shape by the triangular tip 118B of the base 112B. Therefore, the cut piece 420B and the conductor 570B are separated, and the cut piece 420B and the conductor 570B are not physically or electrically connected.
- the state in which the base pieces 430B on both sides of the cut portion 400B are energized via the cut piece 420B is interrupted, and overcurrent can be prevented from flowing through the electric circuit.
- a pair of electrode portion 540B and electrode portion 550B are in contact with a portion of cut portion 400B through conductor 570B, and cut portion 400B is connected to fuse function portion 700B.
- a portion of the cut piece 420B of the section to be cut 400B is bent to cut off the state in which the base pieces 430B on both sides of the section to be cut 400B are energized via the cut piece 420B.
- the current I1B identity current flowing through the base piece 430B is induced to the fuse function portion 700B. Therefore, it is possible to prevent the occurrence of an arc due to the accident current between the separated cut piece 420B and the base piece 430B.
- the current I1B (accident current) induced to the fuse functioning portion 700B quickly melts the fusing portion 740B of the fuse functioning portion 700B to cut off the current flowing through the electric circuit. Furthermore, after the fusing portion 740B is blown, an arc is generated between the terminals 750B of the fuse function portion 700B due to the voltage applied to the base pieces 430B on both sides connected to the electric circuit. The arc is quickly and effectively extinguished by the arc extinguishing material 730B in 700B. As shown in FIGS.
- the conductors 570B are separated from the second ends. While moving toward 330B, part of the cut portion 400B is always kept in contact with the pair of electrode portions (540B, 550B), so the cut portion 400B is connected to the fuse function portion 700B. state is always maintained.
- connection structure (connection member, etc.) between the pair of electrode portions (540B, 550B) and the fuse function portion 700B can be a simple structure that does not consider the movement of the moving body 500B.
- the cut portion 400B and the fuse function 700B when an overcurrent belonging to a relatively low current range flows through the electric circuit, the cut portion 400B and the fuse function 700B is not connected, the cut piece 420B between the base pieces 430B on both sides of the cut portion 400B is cut to immediately cut off the energized state of the base pieces 430B on both sides, thereby interrupting the electric circuit. Prevents overcurrent from flowing. Therefore, as in the conventional art, with a current belonging to a relatively low current range, the fusing portion 740B of the fuse function portion 700B does not fuse and the current cannot be cut off, or it takes a relatively long time to cut off the current. This solves the problem that the overcurrent that flows through the circuit cannot be cut off immediately.
- FIG. 26 is an overall perspective view showing an exploded electric circuit breaker 600C
- FIG. 27(a) is a cross-sectional view along line S--S in FIG. 26
- FIG. 27(b) is a line along line L--L in FIG. It is a sectional view.
- the lower housing 100C is a substantially quadrangular prism made of an insulating material such as synthetic resin, and has a hollow lower accommodating portion 110C inside. 110 C of this lower side accommodation parts are comprised so that 500 C of mobile bodies can be accommodated.
- the lower housing 100C also includes a hollow lower housing portion 160C adjacent to the lower housing portion 110C.
- the lower accommodation portion 160C is configured to accommodate the blocking member 970C.
- a part of the upper surface 120C of the lower housing 100C is provided with a mounting portion 113C recessed in accordance with the shape of the base piece 430C so that the base piece 430C of the cut portion 400C can be mounted.
- the mounting portions 113C are arranged so as to face each other on both sides of the lower housing portion 110C, and the mounting portions 113C support the linearly extending portion to be cut 400C on both sides.
- the circuit section 900C is connected in parallel with the section to be cut 400C.
- the entire circuit section 900C is a conductor made of metal such as copper in order to be electrically connected to the section to be cut 400C via the fuse function section 700C.
- the circuit portion 900C includes a base piece 930C directly connected to one base piece 430C of the cut portion 400C, and a base piece connected to the other base piece 430C of the cut portion 400C via the fuse function portion 700C. 930C. Furthermore, there is a cutting piece 940C located between the base pieces 930C.
- a part of the upper surface 120C of the lower housing 100C is provided with a mounting portion 115C that is recessed to match the shape of the base piece 930C so that the base piece 930C of the circuit portion 900C can be mounted.
- the mounting portions 115C are arranged on both sides of the lower accommodation portion 160C so as to face each other, and the mounting portions 115C support the linearly extending circuit portion 900C on both sides.
- the upper housing 200C is a substantially quadrangular prism made of an insulating material such as synthetic resin, and is paired with the lower housing 100C to form a housing 300C.
- a hollow upper accommodation portion 210C is provided inside, and the upper accommodation portion 210C is configured to accommodate the moving body 500C.
- the upper housing 200C also includes a hollow upper housing portion 170C adjacent to the upper housing portion 210C.
- the upper accommodation portion 170C is configured to accommodate the blocking member 970C.
- a portion of the lower surface 230C of the upper housing 200C is provided with an insertion portion 213C recessed in accordance with the shape of the base piece 430C so that the base piece 430C of the cut portion 400C can be inserted.
- the insertion portions 213C are arranged to face each other on both sides of the upper housing portion 210C, and are arranged at positions corresponding to the mounting portions 113C of the lower housing 100C.
- a portion of the lower surface 230C of the upper housing 200C is provided with an insertion portion 215C recessed in accordance with the shape of the base piece 930C so that the base piece 930C of the circuit portion 900C can be arranged.
- the insertion portions 215C are arranged so as to face each other on both sides of the upper housing portion 170C, and the insertion portions 215C support the linearly extending circuit portion 900C on both sides.
- a power source housing portion 221C that houses the first power source PC is formed in a portion of the upper housing 200C on the side of the upper surface 220C.
- the power source housing portion 221C communicates with the upper end side of the upper housing portion 210C.
- an abnormal signal is input from an external device to the first power source PC.
- the gunpowder inside the first power source PC is exploded, and the air pressure generated by the explosion causes the moving body 500C to move instantaneously within the storage section 310 composed of the upper storage section 210C and the lower storage section 110C. It pushes out to move.
- the accommodation portion 310C extends from the first end 320C of the housing 300C to the second end 330C on the opposite side of the first end 320C. Since the moving body 500C is arranged on the first end portion 320C side, the interior of the housing portion 310C is directed toward the second end portion 330C by the first power source PC provided on the first end portion 320C side. You can move.
- a power source storage portion 241C that stores the second power source 990C is formed in a portion of the upper housing 200C on the side of the upper surface 220C.
- the power source housing portion 241C communicates with the upper end side of the upper housing portion 170C.
- an abnormal signal is input from an external device to the second power source 990C.
- the gunpowder inside the second power source 990C is exploded, and the air pressure generated by the explosion causes the blocker 970C to move instantaneously within the storage section 380C composed of the upper storage section 170C and the lower storage section 160C. It pushes out to move.
- the accommodation portion 380C extends from the first end 320C of the housing 300C to the second end 330C on the opposite side of the first end 320C. Since the blocking body 970C is arranged on the first end portion 320C side, the interior of the housing portion 380C is directed toward the second end portion 330C by the second power source 990C provided on the first end portion 320C side. You can move.
- the electric circuit breaker 600C includes a fuse function unit 700C.
- the fuse function unit 700C includes a fuse element 720C made of a conductive metal such as copper or its alloy in a hollow insulating casing 710C. It is filled with material 730C.
- One terminal 750C of the fuse function portion 700C is connected to the base piece 430C of the cut portion 400C, and the other terminal 750C of the fuse function portion 700C is connected to the base piece 930C of the circuit portion 900C. Therefore, the fuse function portion 700C is electrically connected to the cut portion 400C through the circuit portion 900C.
- the fuse element 720C has a fusing portion 740C between the terminals 750C, and this fusing portion 740C is a portion where the width of the fuse element 720C is locally narrowed and is to be broken by the electric circuit breaker. It is configured to be able to cut off the current by generating heat and fusing when current flows.
- the fuse function portion 700C is housed in the housing portion 251C of the upper housing 200C.
- the electric circuit breaker 600C is used by being attached in the electric circuit to be protected.
- the base piece 430C of the portion to be cut 400C is connected to a portion of the electric circuit so that the portion to be cut 400C constitutes a portion of the electric circuit.
- the protruding portion 530C of the moving body 500C extends along the cut piece 420C and is spaced apart from the cut piece 420C. Normally, the base piece 430C of the section to be cut 400C and the cut piece 420C are not cut and are physically and electrically connected. It is allowed to flow in an electrical circuit via piece 420C.
- the projecting portion 971C of the blocking member 970C extends along the cut piece 940C and is spaced apart from the cut piece 940C.
- the circuit section 900C is in a state of being disconnected by the interrupter 970C and not interrupted.
- the resistance value of the fuse function portion 700C is greater than the resistance value of the cut portion 400C. Since the current I1C flowing through the cut portion 400C and the current I1C' flowing through the fuse element 720C have magnitudes proportional to the reciprocals of the respective resistance values, the normal current I1C ' is as small as about 10% of the total current (current I1C+current I1C').
- a device SC for detecting an abnormal current in the electric circuit is connected to the electric circuit to be protected.
- the abnormal current reaches a predetermined value (for example, 1000 to 2000 A [amperes]). It is determined whether or not it belongs to a lower, relatively low current region. Then, when the device SC determines that the abnormal current belongs to a relatively low current region lower than a predetermined value, the device SC inputs the abnormal signal X1C to the second power source 990C. Then, after a predetermined time has passed, the device SC inputs an abnormality signal X2C to the first power source PC.
- a predetermined value for example, 1000 to 2000 A [amperes]
- the predetermined time is the time until the breaker 970C cuts the cut piece 940C of the circuit section 900C by the second power source 990C.
- the device SC determines that the detected abnormal current does not belong to a relatively low current range lower than a predetermined value and belongs to a relatively high current range higher than a predetermined value, an abnormality signal is sent to the second power source 990C.
- the abnormality signal X2C is input only to the first power source PC without inputting X1C.
- the electric circuit breaker 600C guides the arc generated when the electric circuit is interrupted to the fuse function unit 700C to effectively and quickly extinguish the arc when a relatively high current flows. Therefore, an arc-extinguishing material for arc-extinguishing the arc is not enclosed in the accommodating portion 310C (especially around the cut piece 420). Basically, it is not necessary to enclose the arc-extinguishing material in the accommodating portion 310C, but depending on the specifications, the arc-extinguishing material may be enclosed in the accommodating portion 310C.
- 28(a) is a cross-sectional view showing how the blocking member 970C has moved from the state shown in FIG. 27(b), and FIG. It is sectional drawing which shows a mode that it moved.
- the device SC detects an abnormal current in the electric circuit, it is assumed that the abnormal current belongs to a relatively low current range lower than a predetermined value (for example, 1000 to 2000 A [amperes]).
- the device SC inputs the abnormality signal X1C to the second power source 990C.
- the explosive in the second power source 990C explodes, and the air pressure generated by the explosion is transmitted to the blocking body 970C.
- the air pressure blows the blocking member 970C from the first end portion 320C toward the second end portion 330C, and instantaneously moves toward the second end portion 330 within the housing portion 380C. Then, as shown in FIG.
- the cut piece 940C of the circuit section 900C is strongly pushed downward by the projecting portion 971C of the blocking member 970C, and the cut piece 940C moves to the connection point between the cut piece 940C and the base piece 930C. It is severed nearby and remains physically separated from the base piece 930C. In this manner, the circuit section 900C is cut off by the breaker 970C. It changes to a state in which it is not electrically connected to the disconnection portion 400C. As a result, the abnormal current I2C (see FIG. 27(a)) flowing through the base piece 430C does not flow through the circuit portion 900C to the fuse function portion 700C, but flows only to the cut portion 400C.
- the device SC inputs the abnormality signal X2C to the first power source PC.
- the gunpowder in the first power source PC explodes, and the air pressure generated by the explosion blows the moving body 500C from the first end 320C toward the second end 330C, moving the inside of the housing 310C to the second end. It instantly moves toward the second end 330C.
- the cut piece 420C is strongly pushed downward by the projecting portion 530C of the moving body 500C, and the cut piece 420C is cut near the joint between the cut piece 420C and the base piece 430C. to be physically separated from the base piece 430C.
- the energized state of the base pieces 430C on both sides is immediately interrupted, and the overcurrent I2C can be prevented from flowing through the electric circuit. Since the abnormal current I2C belongs to a relatively low current range lower than a predetermined value, even if the distance between the separated cut piece 420C and the base piece 430C is short, no arc discharge occurs or the arc extinguishes immediately. be.
- FIG. 29 is a cross-sectional view showing a state in which the moving body 500C has moved from the state shown in FIG. 27(b).
- the device SC detects an abnormal current in an electric circuit, it is assumed that the abnormal current does not belong to a relatively low current range lower than a predetermined value but belongs to a relatively high current range higher than a predetermined value. .
- the device SC inputs the abnormality signal X2C only to the first power source PC without inputting the abnormality signal X1C to the second power source 990C.
- the gunpowder in the first power source PC explodes, and the moving body 500C instantly moves inside the housing portion 310C toward the second end portion 330C. Then, as shown in FIG. 29, the moving body 500C moves toward the second end portion 330C, and the projecting portion 530C of the moving body 500C pushes the cut piece 420C strongly downward.
- the cutting piece 420C and the base piece 430C are cut in the vicinity of the connection point, and are physically separated from the base piece 430C. In other words, the state in which the base pieces 430C on both sides of the cut portion 400C are energized via the cut piece 420C is interrupted, and an overcurrent can be prevented from flowing through the electric circuit.
- the current I3C induced to the fuse function portion 700C causes the fusing portion 740C of the fuse function portion 700C to generate heat and melt.
- the moving body 500C cuts the cutting piece 420C to cut off the electrical circuit
- the current I3C is induced to the fuse function unit 700C and current flows in the electrical circuit. not blocked.
- the fusing portion 740C of the fuse function portion 700C has a low rating, the fusing portion 740C is immediately fused by the current I3C to completely cut off the electrical circuit immediately.
- an arc is generated between the terminals 750C of the fuse function portion 700C due to the voltage applied to the base pieces 430C on both sides connected to the electric circuit.
- the arc is quickly and effectively extinguished by the arc extinguishing material 730C in 700C.
- the electric circuit breaker 600C of the present invention when the electric circuit is broken, a relatively high current (accident current) flowing in the electric circuit is induced to the fuse function part 700C, and the induced The arc caused by the current can be extinguished effectively and quickly within the fuse function section 700C. As a result, it is possible to prevent an arc from being generated between the base pieces 430C within the housing 300C and damage the electric circuit interrupting device 600C, so that the electric circuit can be safely interrupted.
- the cut portion 400C and the fuse function portion 700C are closed as shown in FIG. are not connected, the cut piece 420C between the base pieces 430C on both sides of the cut portion 400C is cut to immediately cut off the energized state of the base pieces 430C on both sides, thereby preventing an overcurrent in the electric circuit. prevents it from flowing. Therefore, as in the conventional art, with a current belonging to a relatively low current range, the fusing portion 740C of the fuse function portion 700C does not fuse and the current cannot be cut off, or it takes a relatively long time to cut off the current.
- FIG. 30 is an overall perspective view showing an exploded electric circuit breaking device 600D
- FIG. 31(a) is a cross-sectional view along line NN of FIG. 30
- FIG. 31(b) is a cross-sectional view along line MM of FIG. It is a sectional view.
- the lower housing 100D is a substantially quadrangular prism made of an insulating material such as synthetic resin, and has a hollow lower accommodating portion 110D inside.
- the lower accommodation portion 110D is configured to accommodate the moving body 500D.
- the lower housing 100D includes a hollow lower accommodating portion 160D adjacent to the lower accommodating portion 110D.
- the lower accommodating portion 160D is configured to accommodate the blocking member 970D.
- a part of the upper surface 120D of the lower housing 100D is provided with a mounting portion 113D that is recessed to match the shape of the base piece 430D so that the base piece 430D of the cut portion 400D can be mounted.
- the mounting portions 113D are arranged on both sides of the lower storage portion 110D so as to face each other, and the mounting portions 113D support the linearly extending portion to be cut 400D on both sides.
- the circuit section 900D is connected in parallel with the section to be cut 400D.
- the entire circuit section 900D is a conductor made of metal such as copper so as to be electrically connected to the section to be cut 400D via the fuse element 720D.
- the circuit portion 900D includes a base piece 930D directly connected to one base piece 430D of the cut portion 400D and the other base piece 930D directly connected to the other base piece 430D of the cut portion 400D. and is connected to the cut portion 400D through the fuse element 720D.
- the linearly extending fuse element 720D is inserted back and forth in a housing portion 972D that penetrates the blocking body 970D in the front and rear direction, and both sides of the fuse element 720D that protrudes outward from the housing portion 972D. are connected to base pieces 930D, respectively.
- the fuse element 720D forms part of the circuit section 900D and also forms part of the fuse function section, which will be described later.
- a part of the upper surface 120D of the lower housing 100D is provided with a mounting portion 115D that is recessed to match the shape of the base piece 930D so that the base piece 930D of the circuit portion 900D can be mounted.
- the mounting portions 115D are arranged on both sides of the lower housing portion 160D so as to face each other, and the mounting portions 115D support the linearly extending circuit portion 900D on both sides.
- the upper housing 200D is a substantially quadrangular prism made of an insulating material such as a synthetic resin, and is paired with the lower housing 100D to form a housing 300D.
- a hollow upper accommodation portion 210D is provided inside, and the upper accommodation portion 210D is configured to accommodate the moving body 500D.
- the upper housing 200D also includes a hollow upper housing portion 170D adjacent to the upper housing portion 210D.
- the upper accommodation portion 170D is configured to accommodate the blocking member 970D.
- a portion of the lower surface 230D of the upper housing 200D is provided with an insertion portion 213D recessed to match the shape of the base piece 430D so that the base piece 430D of the cut portion 400D can be inserted.
- the insertion portions 213D are arranged so as to face each other on both sides of the upper accommodation portion 210D, and are arranged at positions corresponding to the mounting portions 113D of the lower housing 100D.
- a portion of the lower surface 230D of the upper housing 200D is provided with an insertion portion 215D recessed to match the shape of the base piece 930D so that the base piece 930D of the circuit portion 900D can be arranged.
- the insertion portions 215D are arranged to face each other on both sides of the upper accommodation portion 170D, and the insertion portions 215D support the linearly extending circuit portion 900D on both sides.
- a power source housing portion 221D that houses the first power source PD is formed in a portion of the upper housing 200D on the side of the upper surface 220D.
- the power source housing portion 221D communicates with the upper end side of the upper housing portion 210D.
- an abnormal signal is input from an external device to the first power source PD.
- the gunpowder inside the first power source PD is exploded, and the air pressure generated by the explosion causes the moving body 500D to move instantaneously within the storage section 310D composed of the upper storage section 210D and the lower storage section 110D. It pushes out to move.
- the accommodation portion 310D extends from the first end portion 320D of the housing 300D to the second end portion 330D on the opposite side of the first end portion 320D. Since the moving body 500D is arranged on the first end portion 320D side, the inside of the housing portion 310D is directed toward the second end portion 330D by the first power source PD provided on the first end portion 320D side. You can move.
- a power source storage portion 241D that stores the second power source 990D is formed in a portion of the upper housing 200D on the side of the upper surface 220D. Then, when it is detected that an abnormal current has flowed through the electric circuit, an abnormal signal is input from an external device to the second power source 990D. Then, for example, the gunpowder inside the second power source 990D is exploded, and the air pressure generated by the explosion causes the blocker 970D to instantly move within the storage section 380D composed of the upper storage section 170D and the lower storage section 160D. It pushes out to move.
- the accommodation portion 380D extends from the first end portion 320D of the housing 300D to the second end portion 330D on the opposite side of the first end portion 320D. Since the blocking body 970D is arranged on the first end portion 320D side, the interior of the housing portion 380D is directed toward the second end portion 330D by the second power source 990D provided on the first end portion 320D side. You can move.
- the electrical circuit interrupter 600D also includes a fuse element 720D.
- a granular arc extinguishing material 730D is filled around the fuse element 720D.
- One end 721D of fuse element 720D is connected to base piece 930D directly connected to base piece 430D of cut portion 400D, and the other end 721D of fuse element 720D is connected to the other end of circuit portion 900D. is connected to the base piece 930D of the . Therefore, the fuse element 720D is electrically connected in parallel with the cut portion 400D through the circuit portion 900D.
- the fuse element 720D has a fusing portion 740D between both ends, and this fusing portion 740D is a portion where the width of the fuse element 720D is locally narrowed, and the current to be interrupted by the electric circuit breaker is cut off. When the current flows, it generates heat and fuses to cut off the current.
- the fuse element 720D is housed in the housing portion 972D of the breaker 970D.
- arc-extinguishing material 730D is filled in housing portion 972D so as to surround fuse element 720D.
- the fuse function part provided in the electric circuit breaker 600D is different from the fuse function part 700C in the form of a fuse in which an arc-extinguishing material 730C and a fuse element 720C are enclosed in a casing 710C as shown in FIG.
- the electric circuit breaker 600D is used by being attached in an electric circuit to be protected.
- the base piece 430D of the section to be cut 400D is connected to a part of the electric circuit so that the section to be cut 400D constitutes a part of the electric circuit.
- the protruding portion 530D of the moving body 500D extends along the cut piece 420D and is spaced apart from the cut piece 420D. Normally, the base piece 430D of the section to be cut 400D and the cut piece 420D are not cut and are physically and electrically connected. It is allowed to flow in an electrical circuit via strip 420D.
- the accommodating portion 972D of the interrupter 970D is filled with the arc-extinguishing material 730D so as to surround the fuse element 720D, and the fuse element 720D connects the two base pieces 930D.
- the circuit section 900D is in a state where it is disconnected by the blocking body 970D and is not blocked.
- the resistance value of the fuse element 720D is greater than the resistance value of the cut portion 400D. Since the current I1D flowing through the cut portion 400D and the current I1D' flowing through the fuse element 720D have magnitudes proportional to the reciprocals of the respective resistance values, the normal current I1D ' is as small as about 10% of the total current (current I1D+current I1D').
- a device SD for detecting an abnormal current in the electric circuit is connected to the electric circuit to be protected.
- the abnormal current reaches a predetermined value (for example, 1000 to 2000 A [amperes]). It is determined whether or not it belongs to a lower, relatively low current region.
- the device SD determines that the abnormal current belongs to a relatively low current range lower than a predetermined value, the device SD inputs an abnormal signal X1D to the second power source 990D. Then, after a predetermined time has passed, the device SD inputs the abnormality signal X2D to the first power source PD.
- the predetermined time is the time until the breaker 970D disconnects the fuse element 720D of the circuit section 900D by the second power source 990D.
- the device SD determines that the detected abnormal current does not belong to a relatively low current range lower than a predetermined value and belongs to a relatively high current range higher than a predetermined value, an abnormality signal is sent to the second power source 990D.
- the abnormality signal X2D is input only to the first power source PD without inputting X1D.
- the electric circuit breaker 600D can effectively and quickly extinguish the arc generated when the electric circuit is interrupted by inducing it to the fuse element 720D when a relatively high current flows. Therefore, the arc-extinguishing material for extinguishing the arc is not enclosed in the housing portion 310D (especially around the cut piece 420D). Basically, it is not necessary to enclose the arc-extinguishing material in the accommodating portion 310D, but depending on the specifications, the arc-extinguishing material may be enclosed in the accommodating portion 310D.
- 32(a) is a cross-sectional view showing how the blocking member 970D has moved from the state shown in FIG. 31(b), and FIG. It is sectional drawing which shows a mode that it moved.
- the device SD detects an abnormal current in an electric circuit, it is assumed that the abnormal current belongs to a relatively low current range lower than a predetermined value (for example, 1000 to 2000 A [amperes]).
- a predetermined value for example, 1000 to 2000 A [amperes]
- device SD inputs an anomaly signal X1D to second power source 990D.
- the explosive in the second power source 990D explodes, and the air pressure generated by the explosion is transmitted to the blocking body 970D.
- the air pressure blows the blocking member 970D from the first end portion 320D toward the second end portion 330D, and instantaneously moves the inside of the housing portion 380D toward the second end portion 330D.
- the fuse element 720D of the circuit section 900D is strongly pushed downward through the arc-extinguishing material 730D by the circuit breaker 970D, and the fuse element 720D is cut off and the base piece 930D is cut. become physically separated from In this manner, the circuit section 900D is blocked by the blocking member 970D, so that the circuit section 900D is changed to a state of being electrically disconnected.
- the abnormal current I2D (see FIG. 31(a)) flowing through the base piece 430D does not flow through the circuit section 900D, but flows only through the section to be cut 400D.
- the device SD inputs the abnormality signal X2D to the first power source PD.
- the gunpowder in the first power source PD explodes, and the air pressure generated by the explosion violently blows the moving body 500D from the first end 320D toward the second end 330D, moving the inside of the housing 310D to the second end 330D. It instantly moves toward the two ends 330D.
- the cut piece 420D is strongly pushed downward by the projecting portion 530D of the moving body 500D, and the cut piece 420D is cut near the joint between the cut piece 420D and the base piece 430D. 430D to be physically separated from the base piece 430D.
- the energized state of the base pieces 430D on both sides is immediately interrupted, and the overcurrent I2D can be prevented from flowing through the electric circuit. Since the abnormal current I2D belongs to a relatively low current range lower than a predetermined value, even if the distance between the separated cut piece 420D and the base piece 430D is short, no arc discharge occurs or the arc extinguishes immediately. be.
- FIG. 33 is a cross-sectional view showing a state in which the moving body 500D has moved from the state shown in FIG. 31(b).
- the device SD detects an abnormal current in an electric circuit, it is assumed that the abnormal current does not belong to a relatively low current range lower than a predetermined value but belongs to a relatively high current range higher than a predetermined value. .
- the device SD inputs the abnormality signal X2D only to the first power source PD without inputting the abnormality signal X1D to the second power source 990D.
- the gunpowder in the first power source PD explodes, and the moving body 500D instantly moves inside the housing portion 310D toward the second end portion 330D. Then, as shown in FIG. 33, the moving body 500D moves toward the second end portion 330D, and the projecting portion 530D of the moving body 500D pushes the cut piece 420D strongly downward.
- the cutting piece 420D and the base piece 430D are cut in the vicinity of the connection point, and are physically separated from the base piece 430D. In other words, the state in which the base pieces 430D on both sides of the cut portion 400D are energized via the cut piece 420D is interrupted, and overcurrent can be prevented from flowing through the electric circuit.
- the current I3D induced to the fuse element 720D heats and fuses the fusing portion 740D of the fuse element 720D.
- the moving body 500D cuts the cutting piece 420D to break the electrical circuit
- the current I3D is induced to the fuse element 720D, and the current flows through the electrical circuit. It has not been.
- the fusing portion 740D of the fuse element 720D has a low rating, the fusing portion 740D is immediately fused by the current I3D to completely cut off the electric circuit immediately.
- an arc is generated between the terminals 721D of the fuse element 720D due to the voltage applied to the base pieces 430D on both sides connected to the electric circuit.
- the arc is quickly and effectively extinguished by the arc-extinguishing material 730D in the housing portion 972D.
- the electric circuit breaker 600D of the present invention when the electric circuit is broken, a relatively high current (accident current) flowing in the electric circuit is induced to the fuse element 720D of the fuse function part, The arc caused by the induced current can be effectively and quickly extinguished by the arc-extinguishing material 730D. As a result, it is possible to prevent an arc from being generated between the base pieces 430D in the housing 300D and damage the electric circuit interrupting device 600D, so that the electric circuit can be safely interrupted.
- the cut portion 400D and the fuse element 720D are separated as shown in FIG.
- the cut piece 420D between the base pieces 430D on both sides of the part to be cut 400D is cut to immediately cut off the energized state of the base pieces 430D on both sides, causing an overcurrent to flow through the electric circuit. is prevented. Therefore, as in the conventional art, with a current belonging to a relatively low current range, the fusing portion 740D of the fuse element 720D does not fuse and the current cannot be cut off, or it takes a relatively long time to cut off the current.
- the electrical circuit breaker of the present invention is not limited to the above-described embodiments, and various modifications and combinations are possible within the scope of the claims and the scope of the embodiments. , the combination is also included in the scope of the right.
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Abstract
Description
320 第一端部
330 第二端部
400 被切断部
420 切断片
430 基部片
500 移動体
600 電気回路遮断装置
700 ヒューズ機能部
730 消弧材
740 溶断部
P 動力源
まず、本願発明の実施形態1に係る電気回路遮断装置のハウジング300を構成する下側ハウジング100を図1に示す。なお、図1(a)は、下側ハウジング100の全体斜視図、図1(b)は、下側ハウジング100の平面図、図1(c)は、A-A断面図である。
では次に、実施形態2に係る本願発明の電気回路遮断装置600Aについて、図13から図16を参照して説明する。また、実施形態2に係る電気回路遮断装置600Aの構成は、規制手段800Aの構成を除き、実施形態1に係る電気回路遮断装置600の構成と基本的に同一なので、同一の構成については説明を省略する。なお、図13(a)は、下側ハウジング100Aの全体斜視図、図13(b)は、下側ハウジング100Aの平面図、図3(c)は、G-G断面図である。
では次に、実施形態3に係る本願発明の電気回路遮断装置600Bについて、図17から図25を参照して説明する。また、実施形態3に係る電気回路遮断装置600Bの構成は、電極部540Bと電極部550Bの配置、及び導電体570Bを備えた点を除き、実施形態1に係る電気回路遮断装置600の構成と基本的に同一なので、同一の構成については説明を省略する。なお、図17(a)は、下側ハウジング100Bの全体斜視図、図17(b)は、下側ハウジング100Bの平面図、図17(c)は、I-I断面図である。
では次に、実施形態4に係る本願発明の電気回路遮断装置600Cについて、図26及び図27を参照して説明する。また、実施形態4に係る電気回路遮断装置600Cの構成は、規制手段800を備えず、回路部900C及び遮断体970Cを備えた点を除き、実施形態1に係る電気回路遮断装置600の構成と基本的に同一なので、同一の構成については説明を省略する。なお、図26は、電気回路遮断装置600Cを分解して示した全体斜視図、図27(a)は、図26のS―S断面図、図27(b)は、図26のL―L断面図である。
では次に、実施形態5に係る本願発明の電気回路遮断装置600Dについて、図30及び図31を参照して説明する。また、実施形態5に係る電気回路遮断装置600Dの構成は、規制手段800を備えず、回路部900D及び遮断体970Dを備えた点と、ヒューズ機能部700Dの構成を除き、実施形態1に係る電気回路遮断装置600の構成と基本的に同一なので、同一の構成については説明を省略する。なお、図30は、電気回路遮断装置600Dを分解して示した全体斜視図、図31(a)は、図30のN―N断面図、図31(b)は、図30のM―M断面図である。
Claims (6)
- ハウジングと、
当該ハウジング内に配置され、電気回路の一部を構成する被切断部と、
前記ハウジングの第一端部側に配置される第一動力源と、
前記ハウジング内を、前記第一端部と、当該第一端部の反対側の第二端部との間で移動する移動体とを備えた、電気回路遮断装置であって、
溶断部と消弧材を備えたヒューズ機能部を備え、
前記移動体は、前記第一動力源によって、前記第一端部から前記第二端部に向けて移動しつつ、前記移動体の一部が、前記被切断部の両側の基部片の間に位置する切断片を切断するように構成されており、
遮断すべき電流が低い場合は、
前記ヒューズ機能部と前記被切断部とを接続させないと共に、第一動力源によって前記移動体が前記第二端部に向けて移動して、前記被切断部の両側の基部片の間に位置する切断片を切断することで、前記被切断部の両側の基部片が通電した状態を遮断し、
遮断すべき電流が高い場合は、
前記ヒューズ機能部と前記被切断部とを接続させると共に、第一動力源によって前記移動体が前記第二端部に向けて移動して、前記被切断部の両側の基部片の間に位置する切断片を切断することで、前記被切断部の両側の基部片が通電した状態を遮断するように構成されていることを特徴とする電気回路遮断装置。
- 前記ヒューズ機能部の両側の端子にそれぞれ接続されている一対の電極部を備え、
遮断すべき電流が低い場合は、
前記移動体が前記第二端部に向けて移動して、前記被切断部の両側の基部片の間に位置する切断片を切断することで、前記被切断部の両側の基部片が通電した状態を遮断すると共に、前記被切断部と前記ヒューズ機能部とを接続させないため、前記被切断部の一部と前記電極部とが接続されないように、第二動力源によって作動した規制手段が、前記移動体の移動を規制し、
遮断すべき電流が高い場合は、
前記移動体が前記第二端部に向けて移動して、前記被切断部の両側の基部片が前記切断片を介して通電した状態で、前記被切断部の一部と前記電極部とが接触して、前記被切断部と前記ヒューズが接続され、
その後、前記移動体の移動に伴って、前記被切断部の両側の基部片が前記切断片を介して通電した状態が、遮断されるように構成されていることを特徴とする請求項1に記載の電気回路遮断装置。
- 前記電極部は前記移動体に設けられており、
前記被切断部の両側の基部片が前記切断片を介して通電した状態とは、前記基部片と、当該基部片と物理的に切断されて切り離された前記切断片とが、アーク放電によって通電した状態であり、
当該通電した状態が、前記移動体の移動に伴って、前記基部片と前記切断片の間に絶縁体が介在されることで、遮断されることを特徴とする請求項2に記載の電気回路遮断装置。
- 前記電極部は、前記ハウジングに設けられており、
前記被切断部の両側の基部片が前記切断片を介して通電した状態とは、前記基部片と、当該基部片と物理的に切断されて切り離された前記切断片とが、前記移動体に設けられた導電体によって通電した状態であり、
当該通電した状態で、前記移動体の前記導電体を介して、前記被切断部の基部片と前記電極部とが接続されて、前記被切断部と前記ヒューズが接続されることを特徴とする請求項2に記載の電気回路遮断装置。
- 前記ヒューズ機能部を介して前記被切断部に接続される回路部を備え、
遮断すべき電流が低い場合は、
前記回路部が、第二動力源によって移動した遮断体によって遮断されて、前記ヒューズ機能部と前記被切断部とが接続されていない状態となり、その後、第一動力源によって前記移動体が前記第二端部に向けて移動して、前記被切断部の両側の基部片の間に位置する切断片を切断することで、前記被切断部の両側の基部片が通電した状態を遮断し、
遮断すべき電流が高い場合は、
前記回路部が遮断されずに、前記ヒューズ機能部と前記被切断部とが接続された状態のままで、第一動力源によって前記移動体が前記第二端部に向けて移動して、前記被切断部の両側の基部片の間に位置する切断片を切断することで、前記被切断部の両側の基部片が通電した状態を遮断するように構成されていることを特徴とする請求項1に記載の電気回路遮断装置。
- 前記ヒューズ機能部のヒューズエレメントが前記回路部の一部を構成しており、
さらに、当該ヒューズエレメントは周囲を消弧材によって囲まれており、
遮断すべき電流が低い場合は、前記回路部の一部である前記ヒューズエレメントが、前記第二動力源によって移動した遮断体によって遮断されることを特徴とする請求項5に記載の電気回路遮断装置。
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JPS4528139B1 (ja) * | 1968-01-12 | 1970-09-14 | ||
JPS59169029A (ja) * | 1983-03-08 | 1984-09-22 | ジ−・アンド・ダブリユ−・エレクトリツク・カンパニ− | 高温技術電流遮断器 |
US20200035437A1 (en) * | 2017-03-17 | 2020-01-30 | Autoliv Development Ab | Pyrotechnic switch with a fuse element |
JP2021051989A (ja) * | 2019-04-05 | 2021-04-01 | パナソニックIpマネジメント株式会社 | 遮断装置 |
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JPS4528139B1 (ja) * | 1968-01-12 | 1970-09-14 | ||
JPS59169029A (ja) * | 1983-03-08 | 1984-09-22 | ジ−・アンド・ダブリユ−・エレクトリツク・カンパニ− | 高温技術電流遮断器 |
US20200035437A1 (en) * | 2017-03-17 | 2020-01-30 | Autoliv Development Ab | Pyrotechnic switch with a fuse element |
JP2021051989A (ja) * | 2019-04-05 | 2021-04-01 | パナソニックIpマネジメント株式会社 | 遮断装置 |
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