CN103165357B - Circuit-breaker - Google Patents
Circuit-breaker Download PDFInfo
- Publication number
- CN103165357B CN103165357B CN201210226128.0A CN201210226128A CN103165357B CN 103165357 B CN103165357 B CN 103165357B CN 201210226128 A CN201210226128 A CN 201210226128A CN 103165357 B CN103165357 B CN 103165357B
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- China
- Prior art keywords
- over current
- current trip
- switching mechanism
- intermediate base
- circuit
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H61/00—Electrothermal relays
- H01H61/01—Details
- H01H61/013—Heating arrangements for operating relays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/06—Housings; Casings; Bases; Mountings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/342—Venting arrangements for arc chutes
- H01H2009/343—Venting arrangements for arc chutes with variable venting aperture function of arc chute internal pressure, e.g. resilient flap-valve or check-valve
Abstract
The present invention obtains the over current trip that a kind of heat moves electromagnetic type, and obtains a kind of applicable automatic Composition, circuit-breaker that breaking capacity is high.This circuit-breaker has: switching mechanism portion; Over current trip; Movable contact, it is arranged on the cross bar that rotates in linkage with switching mechanism portion; Breaker part, it is housed in pedestal, comprises the arc-extinction device for breaking arc; And cover portion, its each parts covering intermediate base, pedestal and be housed in intermediate base, in intermediate base, with on the face that intermediate base is orthogonal to the direction that pedestal inserts, the mode relative with breaker part is provided with the first hole, cover the yoke portion arranging over current trip on the first hole, cover portion has the protrusion setting unit of the over current trip locking of those poles by not loading switching mechanism portion, between switching mechanism portion and over current trip, configure insulating element.
Description
Technical field
The present invention relates to the circuit-breakers such as a kind of Inturruptor for sub-line or residual current circuit breaker, in detail, relate to a kind of structure being configured to applicable automatic Composition over current trip etc.
Background technology
As circuit-breaker, not only have by operating operating grip that this circuit-breaker has and making function, the i.e. switching function of circuit cut-off/close, also play open circuit to prevent the important function of electric wire and load equipment being burnt owing to flowing through overcurrent in advance.As everyone knows, for the detection of this overcurrent, be roughly divided into thermal type, electromagnetic type, these modes of electronic type, electronic circuit breaker ratio is easier to carry out automatic Composition, but there is the high shortcoming of product cost.Therefore, there is following circuit-breaker, that is, it is the circuit-breaker that above-mentioned heat moves electromagnetic type, is applicable to automatic Composition, and prevents the metal melt produced together with short interruption from adhering to switching mechanism portion and over current trip.
In this circuit-breaker, there is operating grip and the switching mechanism portion be configured between frame plate respect to one another and the over current trip making switching mechanism portion rotate after detecting overcurrent, be housed in intermediate base, the breaker part comprising arc-extinction device is housed in pedestal, the arc cutting of this arc-extinction device for producing between the movable contact be arranged on the cross bar that rotates in linkage with switching mechanism portion and the fixed contact therefor repeatedly contacting/be separated with this movable contact.At the top of this pedestal mounting intermediate base, and each parts and forming circuit circuit breaker that are housed in pedestal and intermediate base by utilizing cover portion to cover.In addition, the bottom surface of intermediate base is run through the first hole is set, cover the yoke portion being provided with on this first hole and forming over current trip.Over current trip is pressed in intermediate base, and by making the bend that is arranged in yoke portion chimeric with the second hole be arranged on intermediate base, thus be securely fixed in intermediate base.Further, as noted abovely can assemble from top successively, become the structure (for example, referring to Japanese Unexamined Patent Publication 2011-134570 publication) of applicable automatic Composition.
Patent documentation 1: Japanese Unexamined Patent Publication 2011-134570 publication
Summary of the invention
In existing circuit-breaker, utilize intermediate base the breaker part and switching mechanism portion that comprise arc-extinction device to be separated, but run through on the bottom surface of intermediate base and be provided with the first hole, to make the yoke portion of over current trip relative with breaker part.Therefore, when open circuit, the pressure increase of the breaker part caused because of the generation of electric arc is born in yoke portion via the first hole, over current trip must be securely fixed in intermediate base.
On the other hand, in order to improve opening performance further, the pressure of the breaker part caused because of the generation of electric arc must be made to increase further.Therefore, over current trip must be fixed in intermediate base more firmly, but there is following problems, that is, in order to tackle automatic Composition, and fastening cannot dependence of over current trip is spirally connected.
In addition, do not contact with the switching mechanism portion as non-energized portion to make the over current trip as conducting parts, and be provided with certain interval, therefore, there is the problem occurring following situation, namely, when over current trip is pressed into intermediate base, even if the bend such as becoming yoke portion is not chimeric with the second hole of intermediate base, the state that over current trip tilts to direction, cover portion, also can not think and have problems and complete assembling.
The present invention proposes to solve above-mentioned problem, and it obtains the over current trip that a kind of heat moves electromagnetic type, and obtains a kind of applicable automatic Composition, circuit-breaker that breaking capacity is high.
Circuit-breaker involved in the present invention has: switching mechanism portion, and it has operating grip, is configured between frame plate respect to one another; Over current trip, it detects overcurrent, and switching mechanism portion is rotated; Intermediate base, it is by switching mechanism portion and to be placed with the over current trip in this switching mechanism portion fastening; Movable contact, it is arranged on the cross bar that rotates in linkage with switching mechanism portion; Breaker part, it comprises arc-extinction device, and this arc-extinction device carries out in this movable contact with movable contact the arc cutting that produces between the fixed contact therefor that contacts/be separated repeatedly; Pedestal, it accommodates this breaker part; And cover portion, its each parts covering intermediate base, pedestal and be housed in intermediate base, in intermediate base, with on the face that this intermediate base is orthogonal to the direction that pedestal inserts, run through in the mode relative with breaker part and be provided with the first hole, and cover the parts arranging on this first hole and form over current trip, the described over current trip not loading those poles in switching mechanism portion is engaged by cover portion, between switching mechanism portion and over current trip, be configured with insulating element.
The effect of invention
According to the present invention, owing to utilizing insulating element and cover portion to be engaged by over current trip, so a kind of circuit-breaker of high breaking capacity of applicable automatic Composition can be provided.
Accompanying drawing explanation
Fig. 1 is the outward appearance oblique view of the circuit-breaker representing embodiments of the present invention 1.
Fig. 2 represents the figure accommodating parts in the intermediate base in Fig. 1.
Fig. 3 is the figure of the over current trip represented in Fig. 1.
Fig. 4 is the oblique view at the back side in the cover portion represented in Fig. 1.
Fig. 5 is the amplification oblique drawing of the state of installing insulating parts in the over current trip of the central electrode represented in FIG.
Fig. 6 is vertical view and the profile of the intermediate base represented in Fig. 1.
Fig. 7 is vertical view and the profile of the pedestal represented in Fig. 1.
Fig. 8 is profile when making intermediate base chimeric with the pedestal in Fig. 1.
Fig. 9 is the figure of the breaker part represented in Fig. 1.
Embodiment
Execution mode 1
Fig. 1 is the oblique view under the tripped condition of circuit-breaker in embodiments of the present invention 1, and Fig. 1 (a) illustrates outward appearance, and Fig. 1 (b) illustrates the figure splitting into cover portion, intermediate base, pedestal from Fig. 1 (a) respectively.In addition, Fig. 2 represents the figure accommodating parts in Fig. 1 (b) in intermediate base, Fig. 3 represents the over current trip of a wherein pole in Fig. 2 and the figure in yoke portion, Fig. 4 is the oblique view at the back side representing cover portion, and Fig. 5 is the amplification oblique drawing representing installing insulating parts 54 in the over current trip 52 of central electrode.And, Fig. 6 and Fig. 7 represents intermediate base, pedestal respectively, Fig. 6 (a) and Fig. 7 (a) is the vertical view corresponding with each X view (direction of arrow of Fig. 1 (b)) in Fig. 1 (b), Fig. 6 (b) and Fig. 7 (b) is profile, and Fig. 8 is the profile (being equivalent to (b) of Fig. 6 and Fig. 7) when making intermediate base chimeric with pedestal.In addition, Fig. 9 represents the figure accommodating parts in Fig. 1 (b) in pedestal.
On Fig. 1, the insulation frame of the circuit-breaker 101 of 3 poles is made up of cover portion 1, intermediate base 2 and pedestal 3.Wherein, contain in intermediate base 2: switching mechanism portion 51, it has operating grip 4; The over current trip 52 of corresponding with number of poles (being 3 in the case); And insulating element 54, between its over current trip 52 being arranged on central electrode and switching mechanism portion 51, in pedestal 3, still contain the arc-extinction device 53 corresponding with number of poles respectively.In addition, for intermediate base 2, in order to prevent the internal pressure caused due to the electric arc because producing during open circuit to rise the damage caused, and make the side plate 2a2a of intermediate base 2 chimeric with the recess 3a3a of pedestal 3.Thus, this side plate 2a2a becomes a part for insulation frame.In addition, because operating grip 4 protrudes from the handle fenestra 1a in cover portion 1, so to connection direction (being clockwise direction on the paper of Fig. 1) or direction (for counterclockwise on the paper of Fig. 1) operation this point can be disconnected, and according to the position relationship of arc-extinction device 53,5 is power supply side terminals, 6 is load side terminal this point, respectively as well known in the art.
As shown in Figure 2, over current trip 52, switching mechanism portion 51 and arc-extinction device 53(are with reference to Fig. 1 (b)) be also known.Namely, fixed contact therefor 9 at one end has fixed contact 8, be fastened in yoke portion 7, movable contact 13 is connected with power supply side terminal 5 via flexible copper twisted wire 10, at one end there is moving contact 11, kept by the cross bar 12 rotated in linkage with switching mechanism portion 51, make repeatedly to carry out between this fixed contact therefor 9 and this movable contact 13 contacting/being separated, utilize arc-extinction device 53 to be breaking in this contact/separation, particularly make the electric arc produced between fixed contact 8 and moving contact 11 due to separation.
Switching mechanism portion 51 carries out so-called blocking by following parts, that is: handle arms 15, and its earth's axis free to rotate is supported on the framework 14 that formed by relative pair of frames plate 14A14B; Operating grip 4, it is fastened in this handle arms 15; Trip(ping) bar 16 and chain shot 17, they are also that the earth's axis free to rotate is supported on framework 14, are rotated by the action of over current trip 52 described later; And cross bar 12, it is with by the rotation of this chain shot 17, the elbow-bar mechanism not marking label of action links, and same axle is supported on framework 14 and rotates.In addition, frame plate 14A(14B) in the front and back in power source loads direction, there is foot 14A114A2, be arranged in patchhole 2b on intermediate base 2 (with reference to Fig. 6 (a)) by above-mentioned foot 14A114A2 is inserted into, thus switching mechanism portion 51 be fastened on the assigned position in insulation frame.Here, due to the detailed content of elbow-bar mechanism, namely, the manual operation of circuit-breaker 101 (is connected ~ is disconnected, disconnect ~ connect), trip operation or tripping operation after reset operation be not main points of the present invention, so omit more detailed description (in addition, for the explanation of each operation, also can with reference to Japanese Patent Application 2008-317552 etc.).
As shown in Figure 3, over current trip 52, when observing with current path, is made up of following part, that is: fixed contact therefor 9, and it at one end has fixed contact 8; Coil 18, it is electrically connected (hereinafter referred to as being connected) with this fixed contact therefor 9; Relay terminal 19, it is connected with this coil 18; Bimetal leaf 20, it is connected with this relay terminal 19; Flexible copper twisted wire 21(is with reference to Fig. 2), it is connected with any part obtaining the amount of bow expected for being generated heat by it of this bimetal leaf 20; And load side terminal 6, it is connected with this flexible copper twisted wire 21, and in order to the electromagnetic force of coil 18 of applying in a flexible way, over current trip 52 is also made up of following part, that is: fixed iron core 22, and it is fastened on fixed contact therefor 9 together with yoke portion 7; Insulated tube 23, it covers this fixed iron core 22, and is positioned on the internal diameter of coil 18; And movable core 24, it is positioned on the internal diameter of this insulated tube 23, resists not shown preloading spring and moves.Namely, this over current trip 52 is the dynamic electromagnetic types of heat, form the dynamic portion of heat by relay terminal 19, bimetal leaf 20 and flexible copper twisted wire 21, form electromagnetism portion by yoke portion 7, coil 18, fixed iron core 22, insulated tube 23, preloading spring and movable core 24.
As shown in Figure 4, the back side in cover portion 1 is provided with receiving space 1a, the coil 18 of its collecting over current trip 52, be provided with in the end of this receiving space 1a and protrude setting unit 1b, it is when being installed on cover portion 1 on pedestal, is engaged by the yoke end 7b in yoke portion 7.
In addition, as shown in Figure 5, insulating element 54 is formed as roughly " コ " shape, in the groove that its recess place is arranged, is provided with the yoke end 7b of the over current trip 52 of central electrode.After over current trip 52 is pressed in intermediate base 2, the protuberance 54a of insulating element 54 is movable chimeric with the pair of frames 14 of over current trip 52, and insulating element 54 loads switching mechanism portion 51.Because this insulating element 54 is arranged near fixed contact 8, if so is formed by the material of releasing arc gas when short interruption, then contribute to the gas pressure rising caused by the generation of electric arc during open circuit.In addition, within this material, if ceramic fibre or metal hydroxides mixed as filler as parent by the resin of nylon-type, then the insulation recovery after just carrying out short interruption can be promoted.
The action of this over current trip 52 is as noted above is known, namely, as shown in Figures 2 and 3, when overload electric current flows through to be more than or equal to the stipulated time, by making bimetal leaf 20 bending to the right on paper, thus by adjustment screw division 20a, trip(ping) bar 16 is rotated, and by this rotation, the chain shot 17 abutted with trip(ping) bar 16 is rotated, thus switching mechanism portion 51 is tripped, movable contact 13 is separated with fixed contact therefor 9.On the other hand, when short circuit current flow, in coil 18, produce larger magnetic force, move to the right by making movable core 24 resist the elastic force of preloading spring, thus directly make chain shot 17 rotate, make switching mechanism portion 51 trip equally.In addition, the collecting of over current trip 52 in insulation frame is by load side terminal 6 being inserted to pedestal 3, is inserted in yoke portion 7 and relay terminal 19 and carries out, therefore, be below described in intermediate base 2.
As shown in FIG. 6 and 7, for above-mentioned load side terminal 6 and power supply side terminal 5, from the meaning as the relay point on current path, only to insertion groove 3b(load side terminal 6 respectively), insert in insertion groove 3c (power supply side terminal 5), do not need to be fixed so securely.
On the other hand, relay terminal 19 is chimeric by press-in in the patchhole 2c of setting on intermediate base 2 installs.As noted above, due to that pole place in mounting switching mechanism portion 51, switching mechanism portion 51 engages via insulating element 54, in addition those poles are then engaged by the protrusion setting unit 1b in cover portion 1, so in over current trip 52, for the yoke end 7b being fastened with fixed contact therefor 9, if apply the power in the direction transferred to by relay terminal 19, then yoke portion 7 will with yoke end 7b for fulcrum rotates, but relay terminal 19 cannot rotate due to install chimeric with patchhole 2c, can not extract from patchhole 2c.
In addition, for yoke portion 7, when consider there is this movable member this point of movable core 24 and have (via fixed contact therefor 9, coil 18, relay terminal 19 and) bimetal leaf 20 this point that mechanically links, movement (bending) due to above-mentioned movable core 24 and bimetal leaf 20 affects the current characteristics of this circuit-breaker 101, thus realized by this insertion fastening must be firmly.
Therefore, in the present embodiment, yoke portion 7 arranges two place bend 7a, and on intermediate base 2, run through and the second hole 2e chimeric with this bend 7a is set.If describe the size relationship of above-mentioned bend 7a and the second hole 2e in detail, be then that between the partition wall of the intermediate base 2 at the position of being inserted in this yoke portion 7, inside dimension B arranges slightly narrow (A > B) relative to the two ends size A comprising bend 7a.On the other hand, inside dimension C between the partition wall at the position of the second hole 2e is set to identical with A (A=C), and makes the region of inside dimension C corresponding with the surface area D of bend 7a.Like this, when inserting yoke portion 7, slightly opened laterally by thermoplastic resin molded partition wall, if bend 7a arrives inside dimension C place simultaneously, then the partition wall opened laterally restores to the original state, and stops loosening of bend 7a.That is, over current trip 52 is once insert, and over current trip 52 is also subject to fastening at least one pole place, corresponding, become the state being difficult to extract, in other words, this means to be securely fixed on the position of regulation, and then also contribute to the stabilisation of current characteristics.
As noted above, over current trip 52 is not needed to be fastened in insulation frame by such as screw fastening etc., clearly known according to Fig. 1 (a) and Fig. 2, so-called stacked by making each parts carry out from the top on paper, thus form circuit-breaker 101, therefore, can automatic Composition be carried out, its manufacturing cost can be suppressed.In addition, for the second hole 2e, in the Mold Making of intermediate base 2, as described in word, run through formation in the mode in " hole ", but might not which be defined in, only otherwise yoke portion 7 is loosened, then also can " hole " obturation.
But, when considering the cost of manufacture of mould, preferably run through formation as " hole ".In addition, in the bottom being fastened with the position of this over current trip 52 of intermediate base 2, as shown in Fig. 1 (b), arc-extinction device 53 is placed with.On the other hand, the second hole 2e is inaccessible to be bent portion 7a to a certain degree, but is not entirely shut.Therefore, be envisioned that the arcing gas produced by arc-extinction device 53 when short interruption arrives this situation of switching mechanism portion 51, so be not very preferred by the second hole 2e.Therefore, in present embodiment 1, comprise the position of the second hole 2e, the power supply-load direction of pedestal 3 has lug boss 3e(with reference to Fig. 7 (b)).Thus, clearly known according to Fig. 8, when making intermediate base 2 chimeric with pedestal 3, utilizing lug boss 3e to be entirely shut by the second hole 2e, therefore, the raising of opening performance can be realized especially.And, this lug boss 3e pre-sets in order to ensure the insulation of interpolar, particularly creepage distance, but, for the stabilisation realizing hereto described automatic Composition and characteristic, and even the raising of opening performance, can not add along with parts and wait cost to increase.
In addition, about the raising of this opening performance, (background technology part describes) electric arc is adopted to move tripping system in the present embodiment.So-called electric arc moves tripping system, refers to and utilizes electromagnetic repulsion to guide to arc-extinction device 53 on the electric arc produced when short interruption, while guaranteeing the current path caused by this electric arc, finally utilize this arc-extinction device 53 breaking arc.Specifically, the electric arc produced between two contacts 9,13, shifts in fixed contact therefor 9 side direction yoke portion 7, at movable contact 13 side direction arc runner 25(with reference to Fig. 9) transfer.By this transfer, current path become the grid 53a ~ yoke portion 7 ~ coil 18 of power supply side terminal 5 ~ arc runner 25 ~ arc-extinction device 53 ~ ... ~ load side terminal 6, but now, utilize the sense of current (arrow E) due to the arc runner 25 shown in Fig. 9, with grid 53a on paper from downside towards the repulsive force in the magnetic field that the sense of current (arrow F) of upside produces for different directions, and due to the sense of current (arrow G towards the fastening point between fixed contact therefor 9 in arrow F and yoke portion 7, with reference to Fig. 3) be similarly different directions and the repulsive force in magnetic field that produces, electric arc is guided to arc-extinction device 53.Cut off directed next electric arc, its result, the big current accompanied with the generation of this short circuit is promptly cut off.
Clearly known according to explanation hereto, need yoke portion 7 is exposed relative to fixed contact therefor 9 and grid 53a, but this point is realized by following countermeasure.Namely, the bottom surface being fastened with over current trip 52 of intermediate base 2 is run through the first hole 2d is set, fastening by over current trip 52, thus utilize yoke portion 7 that this first hole 2d is inaccessible, in other words, the grid 53a of the uppermost of arc-extinction device 53 is relative with yoke portion 7, between not across any article.In addition, the first hole 2d is (being downside on the paper of Fig. 6 (a)) extended narrow to the right, but inserts two contacts 913 in this narrow, and for guaranteeing the rotary motion trace of movable contact 13.In addition, 26 are the bulbs of pressure by bearing arcing gas and promote the reflecting plate as pressure bearing portion of the separating action of movable contact 13,27 is the iron cores promoting electromagnetic repulsion, but, " breaker part " described in claim refers to, the region be such as made up of said reflection plate 26, iron core 27 and arc-extinction device 53, arc runner 25.
Other countermeasures about above-mentioned " promotion separating action " are here described.In figure 3, fixed iron core 22 arranges hollow bulb 22a, abut or close bar 28 with movable core 24 if had in this hollow bulb 22a, then as described in the background section, bar 28 is made to clash into movable contact 13 by moving of movable core 24, therefore, do not wait for that the action in switching mechanism portion 51 just can make to be separated rapidly between two contacts 9,13.On this basis, owing to moving in tripping system at the electric arc of present embodiment 1, as noted above, coil 18 is comprised in the current path caused by electric arc, so be still make movable core 24 and even bar 28 towards the form of the direction movement making movable contact 13 be separated by the magnetic force of this coil 18, therefore, movable contact 13 can be stoped to rotate (what is called swings back) to contact direction, higher arc voltage can be maintained, namely realize the rapid transfer of electric arc.In addition, label 29 is the barrier layers of laying between yoke portion 7 and coil 18, utilizes this barrier layer 29, not only when detecting electric current, and in electric arc maintains, electric current (arc current) all can not be made to walk around coil 18, produce suitable magnetic force all the time.
When circuit-breaker 101 carries out short interruption, utilize between fixed contact 8 and moving contact 11, namely breaker part place produce electric arc produce gases at high pressure, but the pressure of these gases at high pressure, produces the power boosted to the direction in cover portion 1 in the yoke portion 7 of exposing from the first hole of intermediate base 2 to breaker part.
According to the present embodiment, yoke end 7b engages by the protrusion setting unit 1b in insulating element 54 and cover portion 1, and therefore, yoke portion 7 can not loosen to the direction in cover portion 1, pressure during open circuit can be made to raise further, the circuit-breaker of the high breaking capacity of applicable automatic Composition can be obtained.
In addition, in over current trip 52, relay terminal 19 press-in is arranged in the patchhole 2c on intermediate base 2, therefore, the assembling of parts can be carried out from a direction, and there is not yoke portion 7 possibility loosening to the direction in cover portion 1, therefore, the stabilisation of characteristic and this requisite key property for circuit-breaker of raising of opening performance can be met, and automatic Composition can be realized simultaneously.This point, particularly for the miniature circuit breaker of cost competitiveness fierceness, can contribute to significantly improving income.
In addition, due to yoke portion 7 is pressed in intermediate base 2, and on intermediate base 2, in order to by fastening for over current trip 52, and run through the second hole 2e be provided with for making this over current trip 52 not loosen to the direction contrary with pressing direction, so yoke portion 7 carry out on intermediate base 2 fastening more firm, the stabilisation of characteristic and the raising of opening performance can be realized.
In addition, this insulating element 54 is formed as roughly " コ " shape, groove for being arranged on the 7b of yoke end is set in its recess, by making protuberance 54a movable chimeric with the pair of frames 14 in switching mechanism portion 51, thus when automatic Composition, make over current trip 52 and insulating element 54, switching mechanism portion 51 combination with one another and assembling, therefore, respective position relationship becomes reliable, becomes the structure of applicable automatic Composition.
Further, because this insulating element 54 is formed by the material of releasing arc gas when short interruption, so also have following effect, that is, the extinguishing arc of the electric arc of the generation between fixed contact 8 and moving contact 11 when short interruption is promoted.
In addition, due to this insulating element by using nylon-based resin as parent and the material that mixing obtains as the ceramic fibre of filler or metal hydroxides is formed, so also have the effect of the insulation recovery after the firm short interruption of promotion.
In addition, in the present embodiment, describe the example be only arranged on by insulating element 54 in the over current trip of that pole being placed with switching mechanism portion 51, but also can cancel the protrusion setting unit 1b in cover portion 1, or regulate and protrude the height of setting unit 1b, cover portion 1 and do not load switching mechanism portion 51 those poles over current trip between configure latch for printed circuit.Now, if latch for printed circuit is also formed by the material of releasing arc gas when short interruption identically with insulating element 54, then the extinguishing arc of the electric arc produced between fixed contact 8 and moving contact 11 when short interruption can be promoted.Further, if this latch for printed circuit by using nylon-based resin as parent and the material that mixing obtains as the ceramic fibre of filler or metal hydroxides formed, then can promote the insulation recovery after firm short interruption.
Claims (6)
1. a circuit-breaker, it has:
Switching mechanism portion, it has operating grip, is configured between frame plate respect to one another; Over current trip, it detects overcurrent, and described switching mechanism portion is rotated; Intermediate base, it is by described switching mechanism portion and to be placed with the described over current trip in this switching mechanism portion fastening; Movable contact, it is arranged on the cross bar that rotates in linkage with described switching mechanism portion; Breaker part, it comprises arc-extinction device, and this arc-extinction device carries out in this movable contact with movable contact the arc cutting that produces between the fixed contact therefor that contacts/be separated repeatedly; Pedestal, it accommodates this breaker part; And cover portion, its each parts covering described intermediate base, described pedestal and be housed in described intermediate base,
In described intermediate base, with on the face that this intermediate base is orthogonal to the direction that described pedestal inserts, run through in the mode relative with described breaker part and be provided with the first hole, and cover on this first hole and the parts forming described over current trip are set,
The feature of this circuit-breaker is,
The described over current trip not loading those poles in described switching mechanism portion is engaged by described cover portion, insulating element is configured with between described switching mechanism portion and described over current trip, this insulating element is arranged on described over current trip, this insulating element is put and carries described switching mechanism portion.
2. circuit-breaker according to claim 1, is characterized in that,
By not arranging the relay terminal of described fixed contact therefor side in described over current trip, be pressed into inserting in the hole that described intermediate base is arranged.
3. circuit-breaker according to claim 1, is characterized in that,
The parts of described for described formation over current trip are pressed in described intermediate base, and in described intermediate base, in order to by fastening for described over current trip, and run through the second hole be provided with for making this over current trip not loosen to the direction contrary with pressing direction.
4. circuit-breaker according to any one of claim 1 to 3, is characterized in that,
Do not load the described over current trip of those poles in described switching mechanism portion, engaged by described cover portion via latch for printed circuit.
5. circuit-breaker according to claim 4, is characterized in that,
Described insulating element and described latch for printed circuit by with the arc contacts produced during circuit-breaker open circuit after produce arc gas material formed.
6. circuit-breaker according to claim 5, is characterized in that,
Described insulating element and described latch for printed circuit by using nylon-based resin as parent and the material that mixing obtains as the ceramic fibre of filler or metal hydroxides formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-273534 | 2011-12-14 | ||
| JP2011273534A JP5747806B2 (en) | 2011-12-14 | 2011-12-14 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103165357A CN103165357A (en) | 2013-06-19 |
| CN103165357B true CN103165357B (en) | 2015-12-16 |
Family
ID=48588347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210226128.0A Active CN103165357B (en) | 2011-12-14 | 2012-06-29 | Circuit-breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5747806B2 (en) |
| KR (1) | KR101301335B1 (en) |
| CN (1) | CN103165357B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6116470B2 (en) * | 2013-12-17 | 2017-04-19 | 三菱電機株式会社 | Method for joining clad metal and metal part, method for manufacturing thermal trip device using the joining method, and circuit breaker |
| KR102126314B1 (en) | 2018-03-08 | 2020-06-24 | 엘에스일렉트릭(주) | Earth Leakage Breaker and Arc Detecting Device detatchable thereto |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0656641A2 (en) * | 1993-12-03 | 1995-06-07 | Moeller GmbH | Trip unit for circuit breaker or protective switches |
| CN1988096A (en) * | 2005-12-21 | 2007-06-27 | 三菱电机株式会社 | Circuit breaker |
| CN102110557A (en) * | 2009-12-24 | 2011-06-29 | 三菱电机株式会社 | Circuit breaker |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2524071Y2 (en) * | 1990-07-31 | 1997-01-29 | 松下電工株式会社 | Circuit breaker |
| JP2686193B2 (en) * | 1991-08-27 | 1997-12-08 | 松下電工株式会社 | Circuit breaker |
| JPH0543452U (en) * | 1991-11-08 | 1993-06-11 | 三菱電機株式会社 | Circuit breaker |
| US6933814B2 (en) * | 2003-05-13 | 2005-08-23 | General Electric Company | Phase-to-phase isolation of cassette type circuit breakers |
-
2011
- 2011-12-14 JP JP2011273534A patent/JP5747806B2/en active Active
-
2012
- 2012-06-20 KR KR1020120066275A patent/KR101301335B1/en active IP Right Grant
- 2012-06-29 CN CN201210226128.0A patent/CN103165357B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0656641A2 (en) * | 1993-12-03 | 1995-06-07 | Moeller GmbH | Trip unit for circuit breaker or protective switches |
| CN1988096A (en) * | 2005-12-21 | 2007-06-27 | 三菱电机株式会社 | Circuit breaker |
| CN102110557A (en) * | 2009-12-24 | 2011-06-29 | 三菱电机株式会社 | Circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130069315A (en) | 2013-06-26 |
| CN103165357A (en) | 2013-06-19 |
| JP5747806B2 (en) | 2015-07-15 |
| JP2013125635A (en) | 2013-06-24 |
| KR101301335B1 (en) | 2013-08-29 |
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