CN101908447B - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
CN101908447B
CN101908447B CN 201010114919 CN201010114919A CN101908447B CN 101908447 B CN101908447 B CN 101908447B CN 201010114919 CN201010114919 CN 201010114919 CN 201010114919 A CN201010114919 A CN 201010114919A CN 101908447 B CN101908447 B CN 101908447B
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China
Prior art keywords
fixture
coil
circuit
electric current
movable piece
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CN 201010114919
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Chinese (zh)
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CN101908447A (en
Inventor
黑崎刚史
信太秀夫
饭塚贵士
牧田阳
门田伸二
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/24Electromagnetic mechanisms
    • H01H71/2463Electromagnetic mechanisms with plunger type armatures

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

The invention provides a circuit breaker, which is small and has an electromagnetic device for instantaneous trip use and increasing the contact separating force during tripping operation owing to overcurrent. The electromagnetic device for instantaneous trip use in a circuit breaker includes: a coil; an insulation pipe, a fixed core, a movable core moving in the insulation pile by a magnetic flux generated by the coil to operate a trip device; a spring for biasing the movable core, a yoke whose one end is provided at the outside end of the fixed core, and the other end is provided on the side of the movable core; and a stator having a stator contact, and being a conductive plate jointed to an end of the coil, engaging the fixed core, and fixed to the yoke. The stator forms a current pathbetween the stator contact and the joint section with the coil for current circulation in the direction same as the current flow to the coil.

Description

Circuit-breaker
Technical field
The present invention relates to a kind of circuit-breaker, especially, relate to its instantaneous tripping operation electromagnet apparatus.
Background technology
The instantaneous tripping operation of in patent documentation 1 disclosed circuit-breaker for example, using with electromagnet apparatus (below, abbreviate electromagnet apparatus as) in, the shape of (core) unshakable in one's determination and the winding of coil etc. are improved, can miniaturization so that have the electromagnet apparatus of multiple solenoid, and can use automatic coil winding machine to make.
Patent documentation 1: Japanese kokai publication hei 8-306295 communique
Summary of the invention
Usually, in the employed electromagnet apparatus of circuit-breaker, according to the sectional area of the spatial content that it is set and electric conductor, the coil winding number is restricted.In the bigger specification of rated current, need thick electric conductor, when hope makes the less specification coupling of itself and instantaneous tripping current value, because there is restriction in the spatial content that arranges, so also can't increase even will increase coil turn.
The present invention proposes in order to solve above-mentioned problem, it provides a kind of small-sized and high performance circuit-breaker with following electromagnet apparatus, this electromagnet apparatus is by changing the shape of the parts that originally use in electromagnet apparatus, thereby can in limited existing space scope, increase load current value, and produce the tripping force identical with existing equipment with less instantaneous tripping current value.
A kind of circuit-breaker, it has switching mechanism portion, has tripgear and switch contact portion that electromagnet apparatus is used in instantaneous tripping operation, and in this circuit-breaker, instantaneous tripping operation has with electromagnet apparatus: coil; Insulating sleeve, it is arranged in this coil; Fixed iron core, it is arranged on the end in this insulating sleeve; Movable core, it inserts in insulating sleeve, utilizes flux that coil produces and mobile in insulating sleeve, makes the tripgear action; Spring, it is arranged between this movable core and the fixed iron core, and movable core is carried out pretension; Yoke, one end are arranged on the outboard end of fixed iron core, and the other end is arranged on the movable core side; And the fixture that is constituted by conductor plate, it has the fixture contact that contacts/separate with the contact of movable piece, one termination of this fixture and coil is closed, and it is fastening and be fixed on the yoke with fixed iron core, fixture from the fixture contact to and the junction surface of coil between, form and make electric current to the circuit that refluxes with the electric current equidirectional that flows through coil.
The effect of invention
Owing to arranging in the space of existing electromagnet apparatus, make the flux that in fixture, produces by current reflux and the flux addition that is produced by coil, so can increase to the electromagnetic force of movable core effect.According to this effect, can set low compared with prior art instantaneous tripping current value etc., enlarge actual specification limit.Perhaps, because there is surplus in electromagnetic force, so can reduce coil turn, thus, can obtain the circuit-breaker of electromagnet apparatus self miniaturization.
Description of drawings
Fig. 1 is the oblique view of the outward appearance of the related circuit-breaker of expression embodiments of the present invention 1.
Fig. 2 is the oblique view of switching mechanism portion, tripgear and pedestal framework under the state pulled down of the outer cover of the expression circuit-breaker that execution mode 1 is related.
Fig. 3 is illustrated in switching mechanism portion under the on-state of the related circuit-breaker of execution mode 1 and the oblique view of tripgear.
Fig. 4 is illustrated in switching mechanism portion under the tripped condition of the related circuit-breaker of execution mode 1 and the oblique view of tripgear.
Fig. 5 is the decomposition side view of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 1.
Fig. 6 is the front view that is illustrated in the fixture of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 1.
Fig. 7 is the figure of a part that is illustrated in the assembling procedure of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 1.
Fig. 8 is the figure of a part that is illustrated in the assembling procedure of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 1.
Fig. 9 is the figure of a part that is illustrated in the assembling procedure of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 1.
Figure 10 is the figure that is illustrated in the electromagnet apparatus that uses in the related circuit-breaker of execution mode 1.
Figure 11 is the end view that is illustrated in the combination of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 1 and movable piece.
Figure 12 is the figure that is illustrated in the fixture of the electromagnet apparatus that uses in the related circuit-breaker of embodiments of the present invention 2.
Figure 13 is the front view that is illustrated in the movable piece of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 2.
Figure 14 is the figure of action of the fixture of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 2 of explanation.
Figure 15 is the figure of action of the fixture of the electromagnet apparatus that uses in the related circuit-breaker of execution mode 2 of explanation.
Embodiment
Execution mode 1
The circuit-breaker that embodiments of the present invention 1 are related is described.In addition, in each figure, same numeral is represented identical or suitable part.Fig. 1 be the related three-phase of expression embodiments of the present invention 1 with circuit-breaker (below, abbreviate circuit-breaker as) the oblique view of outward appearance, the oblique view of switching mechanism portion, tripgear and substrate framework under Fig. 2 state that to be expression pull down its outer cover.
In Fig. 1 and Fig. 2, circuit-breaker 100 has switching mechanism portion 200, tripgear 300, switch contact portion (not shown) and arc-extinction device (not shown).Arc-extinction device is housed in the substrate framework 40 that is made of substrate 101 and Intermediate substrate 102, wherein, substrate 101 and Intermediate substrate 102 are formed by insulating material, and switching mechanism portion 200, tripgear 300 and switch contact portion are fixed and held on the Intermediate substrate 102.The outer cover 111 that is formed by insulating material can be installed on the substrate framework 40 with freely dismantling.
Fig. 3 is switching mechanism portion 200 under connection (ON) state of indication circuit circuit breaker 100 and the oblique view of tripgear 300, and Fig. 4 is switching mechanism portion 200 under tripping operation (trip) state of indication circuit circuit breaker 100 and the oblique view of tripgear 300.
In Fig. 3 and Fig. 4, the three-phase electric circuit that connects at circuit-breaker 100 is in the load circuit, load current more than or equal to setting, be that overload current flows through under the situation more than or equal to the stipulated time, by right-hand with ormal weight flexural deformation in the figure of the bimetal leaf 50 of trip unit of prescribing a time limit of the formation in the tripgear 300, make trip(ping) bar 60 actions of switching mechanism portion 200, the lock part 70 of 60 butts of trip(ping) bar is rotated, thus, make 200 tripping operations of switching mechanism portion, 3 movable piece contacts 9 that contact with 3 fixture contacts 6 of switch contact portion are left, wherein, these 3 fixture contacts 6 respectively with the R of load circuit, S, T three-phase conductor (not shown) connects.
In addition, under the situation of short circuit current flow, produce bigger magnetic force in the solenoid 4 of the electromagnet apparatus of the instantaneous trip unit of formation in tripgear 300, the right-hand attraction of the movable core 2 that will in coil 4, move in the figure, by movable core 2 lock part 70 is rotated, thus, make 200 tripping operations of switching mechanism portion, the fixture contact 6 of switch contact portion is separated with movable piece contact 9.
Below, according to Fig. 5~Figure 11, describe in detail as the electromagnet apparatus of wanting portion of the present invention.Fig. 5 is the decomposition side view of the electromagnet apparatus exploded representation that will adopt in the related circuit-breaker of embodiments of the present invention 1.This electromagnet apparatus is made of insulating sleeve 1, movable core 2, spring 3, coil 4, fixture 5, fixture contact 6, yoke 7, fixed iron core 8 each parts.
Coil 4 is that the conductor of rectangle is reeled and to be constituted by section.The fixture 5 that is connected with an end of coil 4, constitute characteristic of the present invention, constituted by conductor plate as shown in Figure 6, the annulus 5a (below, abbreviate annulus 5a as) that this conductor plate has a 5c of cut-out portion with the part is connected with line part 5b and forms the roughly plane of question mark (question mark) shape.But the circuit that above-mentioned question mark shape represents to flow through electric current forms the question mark shape, and annulus 5a is filled by the 5c of cut-out portion being utilized insulant etc., does not have the ring-type completely of the 5c of cut-out portion and form.The line part 5b of fixture 5 is provided with fixture contact 6.In addition, label 11 is circuit of the electric current that refluxes along annulus 5a from the fixture contact 6 of fixture 5.
Fig. 7 is the figure of the connection status between expression fixture 5 and the coil 4, (a) is front view, (b) is end view, (c) is oblique view.As shown in Figure 7, fixture 5 is by being welded on the end adjacent with the 5c of cut-out portion on one end of coil 4, and carries out electric and firm engagement mechanically.This junction surface 14 is configured on the face of the direction opposite with fixture contact 6, can easily assemble.In addition, annulus 5a is coaxial with coil 4, and forms circuit 11 with electric current to the mode that the direction identical with coil 4 flows.
Fig. 8 is the figure that represents the state of coil 4, fixed iron core 8 etc. and yoke 7 combinations, (a) is front view, (b) is end view, (c) is oblique view.The yoke 7 of support fixation iron core etc. constitutes by observing the magnetic that forms roughly " コ " font from the side, at the one end opening is set, and is configured to make the center of this opening consistent with the axle center of coil 4.Stack the annulus 5a of fixture 5 by the above-mentioned opening portion in yoke 7, an end of riveted and fixed iron core 8 in the inner space of annulus 5a, thus fixed iron core 8, fixture 5 and yoke 7 are firmly fixed.Fixed iron core 8 protrudes to the inside of coil 4 from an end of yoke 7.
Fig. 9 is the figure that represents the state of combinations such as insulating sleeve 1, movable core 2 etc. and coil 4, yoke 7, (a) is end view, (b) is oblique view.In insulating sleeve 1, an end becomes open end 1a, and the other end becomes the diameter opening littler than open end 1a.The movable core 2 that insertion can be moved along quill in insulating sleeve 1 and it is carried out the spring 3 (omitting the diagram of spring 3 in Fig. 9) of pretension, one end of movable core 2 protrudes from the opening of the path of insulating sleeve 1, but movable core 2 is limited by above-mentioned minor diameter part and can not come off from insulating sleeve 1.
When assembling, insulating sleeve 1 is inserted in the coil 4.Form the insertion section of insulating sleeve 1 at the other end of yoke 7, insulating sleeve 1 has in inside under the state of movable core 2 and spring 3, inserts in the coil 4, so that open end 1a side is relative with fixed iron core 8 along the direction of arrow of Fig. 9.After insertion, insulating sleeve 1 is by making the chimeric and location diametrically of open end 1a and fixed iron core 8.The other end of insulating sleeve 1 is hooked on the yoke 7 and fixes by being arranged on flange part 1b on the insulating sleeve 1.As noted above, electromagnet apparatus shown in Figure 10 is finished in each parts 1~8 combination.In addition, in Figure 10, (a) being end view, (b) is oblique view.
Figure 11 is the figure of the position relation between the movable piece 16 of the expression fixture 5 of electromagnet apparatus and switching mechanism portion 200.Movable piece 16 is set to rotate centered by rotation axis 16a, so that movable piece contact 9 contacts/separates with fixture contact 6.In addition, label 17 is the circuit that flow through the electric current of movable piece 16.
In the electromagnet apparatus of the circuit-breaker of formation as noted above, because coil 4 and fixture 5 are electrically connected by junction surface 14, so when movable piece contact 9 and fixture contact 6 closures, electric current from movable piece 16 is mobile along the circuit 17 of movable piece 16,9 through fixture contact 6 from the movable piece contact, circuit 11 along fixture 5 passes through annulus 5a, flows to coil 4 by junction surface 14.At this moment, to become the number of turn (turn) that is produced by the electric current that refluxes in the annulus 5a of fixture 5 be 1 o'clock flux to the flux that produces along the axis of coil 4 and merge the flux that forms by the flux that the electric current that flows through coil 4 produces.
2 parts of fluxs after this merging pass the movable core 2 in the insulating sleeve 1, and it is carried out electromagnetic attraction.Movable core 2 is carried out pretension and is become position of readiness from the position that insulating sleeve 1 protrudes slightly by spring 3, and in this position, only some passes through movable core 2 in the flux by fixture 5 and coil 4 generations.If the electromagnetic attraction to movable core 2 begins, then act on the movable core 2 with the electromagnetic forces with its traction in the coil 4, since along with movable core 2 at the enterprising line displacement of coil center position, the magnetic line of force that runs through increases, so its attraction constantly increases with displacement.The increase of the electromagnetic force that accompanies by as noted above and displacement, then after Once you begin attracting action, the pretightning force of movable core 2 antagonistic springs 3 and move to end position consistently.Movable core 2 after the movement rotates the lock part 70 of the trip(ping) bar 60 of bearing the circuit-breaker trip operation, thereby trips.
According to present embodiment, because by changing the shape of the fixture that originally has, fixture 5 as the circuit use for generation of the back flow current of flux, so need not to increase the coil turn of electromagnet apparatus, just can be obtained stronger electromagnetic force.On the contrary, when obtaining identical electromagnetic force, can reduce coil turn, make the electromagnet apparatus miniaturization.In addition, since as noted above, for fixture 5, as long as its circuit is worked as 1 circle coil, so also can form the shape that the filling cut-out 5c of portion such as utilizing insulant forms, in the case, can increase the mechanical strength of fixture 5.
Execution mode 2
The fixture 500 of the electromagnet apparatus of the circuit-breaker that Figure 12 (a)~(d) expression embodiments of the present invention 2 are related (a) is front view, (b) is end view, (c) is vertical view, (d) is oblique view.
In execution mode 2, movable piece and fixture be configuration relatively as shown in figure 11, when flowing into big electric current from movable piece to fixture, utilization is by the electric current that flows through movable piece and flow through movable piece that the electric current of fixture produces and the repulsion between the fixture, can improve the separating force between movable piece contact 9 and the fixture contact 6.
Figure 13~15th illustrates the figure of its operating principle.At the vector A (the downward arrow among Figure 13) of the electric current that the circuit 17 along movable piece 16 flows with comprise between the position of the reverse composition B of vector (among Figure 14 to upward arrow) of the electric current that flows through fixture 5, because the sense of current is reciprocal, the repulsion effect, therefore, the interval of movable piece 16 and fixture 5 is diminished.On the other hand, at the vector A of the electric current that flows through movable piece 16 and the vector that comprises the electric current that flows through fixture 5 in the same way between the position of composition C (the downward arrow among Figure 15), because the sense of current is identical, the attraction effect, therefore, make the interval of movable piece 16 and fixture 5 become big.Specifically, adopt fixture structure shown in Figure 12.
As shown in figure 12, fixture 500 is crooked to produce step S at annulus 500a on the center line of line part 500b.R1, the R2 of Figure 12 (b) represents the face of fixture 500 and the interval between the movable piece 16, the position that comprises the reverse composition B of current phasor is interval R1, comprise current phasor and be R2 at interval in the position of composition C in the same way, in the central authorities of fixture annulus 500a step S is set, so that R1<R2.Other structures are identical with execution mode 1.
In execution mode 2, owing to change the fixture shape, so that flow through the electric current of movable piece and the current phasor composition that refluxes is nearer between the reverse relative portion in fixture, the current phasor composition that makes the electric current that flows through movable piece and reflux in fixture is for far away between the relative portion in the same way, so produce the effect that the electromagnetic repulsion force that is inversely proportional to square being directly proportional of current value, with distance that is produced by induction between movable piece and the fixture strengthens the trip operation power of movable piece, present embodiment 2 is had that effect and the effect of execution mode 1.

Claims (6)

1. circuit-breaker, it has switching mechanism portion, have instantaneous tripping operation with tripgear and the switch contact portion of electromagnet apparatus,
This circuit-breaker is characterised in that,
Described instantaneous tripping operation has with electromagnet apparatus: coil; Insulating sleeve, it is arranged in this coil; Fixed iron core, it is arranged on the end in this insulating sleeve; Movable core, it inserts in the described insulating sleeve, utilizes flux that described coil produces and mobile in described insulating sleeve, makes the tripgear action; Spring, it is arranged between this movable core and the described fixed iron core, and described movable core is carried out pretension; Yoke, one end are arranged on the outboard end of described fixed iron core, and the other end is arranged on described movable core side; And the fixture that is constituted by conductor plate, it has the fixture contact that contacts/separate with the contact of movable piece, and a termination of this fixture and described coil is closed, and fastening and be fixed on the described yoke with described fixed iron core,
Described fixture from described fixture contact to and the junction surface of described coil between, form and make electric current to the circuit that refluxes with the electric current equidirectional that flows through described coil.
2. circuit-breaker according to claim 1 is characterized in that,
Described fixture is the conductor plate of question mark shape roughly, is made of with the annulus that links to each other with this line part and have a cut-out portion the line part with described fixture contact.
3. circuit-breaker according to claim 1 is characterized in that,
With the central shaft arrangement of the center of the circuit that makes current reflux of the central shaft of described coil, described fixture, described fixed iron core on same straight line.
4. circuit-breaker according to claim 1 is characterized in that,
Described fixture contact is arranged on the opposing face of the face that described fixture engages with described coil.
5. circuit-breaker according to claim 1 is characterized in that,
Make the vector composition of the electric current that refluxes in described fixture via described fixture contact from described movable piece, and position and the interval between the described movable piece of the described fixture that the electric current of the vector composition that the vector composition of electric current that flows through described movable piece is reverse flows through are less, and it is bigger to flow through position and the interval between the described movable piece of the described fixture that the electric current of the current phasor composition vector composition in the same way of described movable piece flows through.
6. circuit-breaker according to claim 5 is characterized in that,
And flow through the position of the described fixture that the electric current of the reverse vector composition of the vector composition of electric current of described movable piece flows through and and flow through between the position of the described fixture that the electric current of the current phasor composition vector composition in the same way of described movable piece flows through step is set.
CN 201010114919 2009-06-08 2010-02-11 Circuit breaker Active CN101908447B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-137079 2009-06-08
JP2009137079A JP5276523B2 (en) 2009-06-08 2009-06-08 Circuit breaker

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CN101908447B true CN101908447B (en) 2013-09-18

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CN102709130B (en) * 2012-05-16 2014-12-03 上海良信电器股份有限公司 Integrated thermomagnetic system bracket of small circuit breaker and manufacturing method thereof
CN103594298B (en) * 2013-11-22 2016-04-06 王克诚 Automatically controlled breaker of plastic casing and logic mutual locking-type breaker of plastic casing
CN104319200B (en) * 2014-10-15 2016-10-05 温州艾科电器科技有限公司 Double-action electromagnetic trip
CN105810516B (en) * 2014-12-29 2018-06-01 上海良信电器股份有限公司 A kind of circuit-breaker switching on-off operating device
CN104505315B (en) * 2014-12-31 2016-06-29 靖江市海源有色金属材料有限公司 Tripping actuating mechanism
CN105070612A (en) * 2015-08-05 2015-11-18 浙江凯发电气股份有限公司 Electromagnetic release with shunting function
CN105185670B (en) * 2015-09-30 2018-09-11 上海电科电器科技有限公司 Electromagnetic tripping apparatus
CN105448610A (en) * 2015-12-10 2016-03-30 宋和明 Tripping execution device
CN113299527B (en) * 2021-07-26 2021-11-12 广东电网有限责任公司东莞供电局 Permanent magnet movable type medium-low voltage circuit breaker driving device and method

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Also Published As

Publication number Publication date
EP2261944A2 (en) 2010-12-15
JP5276523B2 (en) 2013-08-28
CN101908447A (en) 2010-12-08
EP2261944B1 (en) 2015-09-09
EP2261944A3 (en) 2013-10-23
JP2010282919A (en) 2010-12-16

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