CN105845514A - Arc fault detection circuit breaker - Google Patents
Arc fault detection circuit breaker Download PDFInfo
- Publication number
- CN105845514A CN105845514A CN201610334918.9A CN201610334918A CN105845514A CN 105845514 A CN105845514 A CN 105845514A CN 201610334918 A CN201610334918 A CN 201610334918A CN 105845514 A CN105845514 A CN 105845514A
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- CN
- China
- Prior art keywords
- push rod
- housing
- arc fault
- spring
- fault detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H01H71/04—Means for indicating condition of the switching device
-
- 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
- H01H9/50—Means for detecting the presence of an arc or discharge
-
- 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
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
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Abstract
The invention discloses an arc fault detection circuit breaker which comprises a casing body, a circuit breaker body and an arc fault detection device, wherein the circuit breaker body and the arc fault detection device are accommodated in the casing body. The arc fault detection device comprises a circuit board assembly and a release mechanism. The circuit board assembly and the release mechanism are located in the casing body. The circuit board assembly detects arc faults in a line. When the circuit board assembly detects an arc fault in the line, the circuit board assembly controls the release mechanism to release and gives an instruction. The arc fault detection circuit breaker provided by the invention has an integrated structure, takes power through internal wiring, and has the advantages of compact structure, beautiful appearance and strong anti-interference ability.
Description
Technical field
The present invention relates to Low Voltage Electrical Apparatus, more particularly, it relates to arc fault detection chopper.
Background technology
Along with economic develops rapidly the raising with people's lives, power consumption is also being continuously increased.Electricity consumption
The electrical fire caused rises year by year, it has also become the main reason of initiation fire.In order to reduce electrically
The generation of accident, various electric protective equipments become indispensable part in electric wiring.
Existing overcurrent protection electrical equipment and residual current protecting electrical equipment owing to fault electric arc can not be detected,
Therefore the electrical fire caused due to fault electric arc can not be reduced dangerous.But the electric fire that electric arc causes
The ratio of calamity accident is improving constantly, and therefore, the electric arc fault protection electrical equipment of a kind of novelty is by promptly
Growing up, it can detect the fault electric arc in electric wiring, and cut off before causing electrical fire
Circuit, is effectively prevented the electrical fire that the arc fault of terminating circuit causes.
Existing arc fault detection chopper majority uses spliced structure, in the outside of chopper
Cabling power taking, the shortcoming of splicing structure is that wiring is complicated, and outside cabling affects the beautiful outline form of chopper
See.And outside cabling needs to increase insulating boot and carrys out protection circuit so that chopper volume increases.Outward
Portion's cabling also makes the reduced capability of chopper opposing external disturbance.
Summary of the invention
According to one embodiment of the invention, a kind of arc fault detection chopper is proposed, including: housing,
Accommodate breaker body in the housing and arc fault detection device.Arc fault detection device includes
Circuit board module and tripping mechanism, circuit board module and tripping mechanism are positioned in housing.Circuit board module
Arc fault in detection circuit, circuit board module detects and there is arc fault in circuit, wiring board
Assembly controls tripping mechanism and threads off and indicate.
In one embodiment, circuit board module includes printed substrate and installs on a printed-wiring board
Current transformer, current transformer includes power current transformer and HF current transformer.
In one embodiment, current transformer includes one group or array, the current transformer of each group
Include power current transformer and HF current transformer.The current transformer of same group is disposed in
The same side of printed substrate.Power current transformer and HF current transformer are each via wrapping post
Installing on a printed-wiring board, power current transformer and HF current transformer are in being arranged above and below.
In one embodiment, printed substrate has wiring hole or cable hole, including: first
Fairlead, the second fairlead, N pole wiring hole, L pole wiring hole, electrical apparatus release wiring hole.Electric arc event
Barrier detection device also includes wire: the first wire, the second wire and privates.The one of first wire
The coil that end is connected in breaker body, the other end of the first wire passes high-frequency mutual inductor and first
Fairlead, is then attached to from breaker body wiring L pole patch panel out, and L pole patch panel is worn
Cross the second fairlead.Second wire is N pole power taking line, one end of the second wire and breaker body
N pole patch panel connects, the N pole wiring hole that the other end of the second wire is connected on printed substrate.
Privates is L pole power taking line, and one end of privates is connected to L pole patch panel, the most also connects
To the first wire, the L pole wiring hole that the other end of privates is connected on printed substrate.
In one embodiment, tripping mechanism includes: electrical apparatus release, push rod, the first spring, the second bullet
Spring, indication piece and pressing plate, printed substrate is covered on tripping mechanism.Electrical apparatus release is arranged in housing,
Electrical apparatus release has push rod.Push rod is arranged in housing by positioning convex, and positioning convex forms push rod
Limit channels.First spring is arranged in housing, the position of the first spring localization handspike.Indication piece is pacified
Being contained in the indication window on housing, the second spring is positioned at indication piece and is arranged on housing.Pressing plate
Push down described push rod, the first spring and indication piece, pressing plate and also support described printed substrate.
In one embodiment, push rod has the first work surface and the second work surface.First spring is to turn round
Spring, the first spring is arranged on housing, and an arm of the first spring is fixed on housing, the first spring
Another arm be fixed on the first work surface of push rod.Indication piece has a leg of extension, leg with
Second work surface of push rod coordinates, and leg and the second work surface contact with each other fixing, and indication piece is vertically
Position on direction is fixed by push rod.
In one embodiment, not having electric arc in circuit, circuit board module can't detect in circuit and exists
Electric arc, the push rod of electrical apparatus release shrinks, and push rod does not contacts with push rod, and push rod is positioned by the first spring, refers to
Showing that the leg of part contacts with each other fixing with the second work surface on push rod, the top of indication piece is without departing from outward
Indication window on shell, the second spring-compressed energy storage.
In one embodiment, producing arc fault in circuit, the power current in circuit board module is mutual
The power frequency component of the electric current in sensor and HF current transformer detection circuit and high-frequency signal, according to work
Frequently signal and high-frequency signal judge to exist on circuit arc fault, and circuit board module controls electrical apparatus release and takes off
Button, the push rod of electrical apparatus release stretches out, and push rod promotes push rod, and push rod overcomes the spring force of the first spring to make
Push rod moves, and the leg of indication piece separates with the second work surface on push rod, and the second spring is released and can be upspring,
Indication piece pops up, beyond indication window to indicate trip status.
In one embodiment, arc fault detection device also includes test mechanism, and test mechanism is to line
Road board component is tested.Test mechanism includes test button and key switch, wherein test button
Being arranged on housing, key switch is arranged on circuit board module.Or test mechanism include test by
Button, torsion spring and contact, wherein test button is arranged on housing, and torsion spring and contact are arranged on wiring board
On assembly.
In one embodiment, housing includes the first housing and the second housing, the first housing and the second shell
One of them of body be base, another for lid, the first housing and the second housing splicing after formed housing.
The arc fault detection chopper of the present invention has the structure of integration, uses internal cabling power taking
Mode, compact conformation, good looking appearance, external interference resistance is strong.
Accompanying drawing explanation
The above and other feature of the present invention, character and advantage will be by below in conjunction with the accompanying drawings and real
Executing the description of example and become apparent, the most identical reference represents identical spy all the time
Levy, wherein:
Fig. 1 discloses the external structure of the arc fault detection chopper according to one embodiment of the invention
Figure.
Fig. 2 discloses the internal structure of the arc fault detection chopper according to one embodiment of the invention
Figure.
Fig. 3 discloses wiring board group in the arc fault detection chopper according to one embodiment of the invention
The structure chart of part.
Fig. 4 discloses tripping mechanism in the arc fault detection chopper according to one embodiment of the invention
Structure chart, its center platen is illustrated.
Fig. 5 discloses tripping mechanism in the arc fault detection chopper according to one embodiment of the invention
Structure chart, its center platen is concealed.
Fig. 6 discloses tripping mechanism in the arc fault detection chopper according to one embodiment of the invention
The structure chart of pressing plate, disclose the structure of pressing plate first.
Fig. 7 discloses tripping mechanism in the arc fault detection chopper according to one embodiment of the invention
The structure chart of pressing plate, disclose the structure of pressing plate second.
Fig. 8 discloses the inside office of arc fault detection chopper according to another embodiment of the present invention
Portion's structure chart.
Detailed description of the invention
Fig. 1 discloses the structure chart of the arc fault detection chopper according to one embodiment of the invention.
This arc fault detection chopper is applied to terminal power distribution line end, for occurring electric arc in circuit
Time cut off circuit in time, to avoid the fire incident caused due to fault electric arc.As it is shown in figure 1,
This arc-fault circuit interrupter includes: breaker body 101, arc fault detection device 102, first
Housing the 107, second housing 106.One of them of first housing 107 and the second housing 106 is the end
Seat, another be lid, form the housing of chopper after both splicings.In the embodiment shown in fig. 1,
First housing 107 is base, and the second housing 106 is lid.At the top of chopper, there is operation handle
108, test button 105 and indication window 109.Test button 105 is arranged on operation handle 108
Side.Breaker body 101 and arc fault detection device 102 are contained in housing, chopper
Body 101 and arc fault detection device 102 have been co-located at the first housing 107 and the second housing
In the shell of 106 compositions, form the structure of integral type.Breaker body 101 can as required by
It is configured with a pole or multipole.In the illustrated embodiment, breaker body 101 is configured to
There are the two poles of the earth: N pole and L pole, left side is N pole, and right side is L pole.N pole and L are the most permissible
Being configured to have different defencive functions, such as, in the illustrated embodiment, L pole is configured to
Having overload protection and short-circuit protection function, N pole does not the most possess above-mentioned defencive function.Need
Bright, the function of such as overload protection and short-circuit protection can configure as required.At other
Embodiment in, can all configure overload protection function at the two poles of the earth of breaker body 101 or multipole
Or short-circuit protection function.Arc fault detection device 102 includes circuit board module 103, dropout machine
Structure 104 and test button 105.Circuit board module 103 and tripping mechanism 104 are positioned at enclosure interior,
The most invisible, test button 105 is arranged on housing, the most visible, test
Button 105 is also a part for arc fault detection device 102.In one embodiment, electric arc event
The width that width is a module of barrier detection device 102, i.e. 18mm.
With reference to shown in Fig. 3, Fig. 3 discloses the arc fault detection according to one embodiment of the invention and breaks
The structure chart of circuit board module in the device of road.In the embodiment shown in fig. 3, circuit board module 103 is adopted
By internal cabling and the mode of power taking, all of cabling all in the enclosure interior of chopper, therefore circuit
The cabling of board component 103 does not interferes with the good looking appearance that chopper is overall.As it is shown on figure 3, wiring board
Assembly 103 includes printed substrate and installs current transformer on a printed-wiring board.Printed wire
The appearance profile of plate (PCB) 233 is similar with the cross section profile of the shell of arc fault detection chopper
Seemingly, during therefore printed substrate 233 can successfully put into the shell of arc fault detection chopper.
Printed substrate 233 is covered in above tripping mechanism 104 and has the pressing plate 346 in tripping mechanism
Support (being described below in conjunction with tripping mechanism).Current transformer can include one group or array,
The current transformer of each group includes power current transformer and HF current transformer.Same group
Current transformer is disposed in the same side of printed substrate.In the embodiment shown in fig. 3, in print
One group of current transformer is shown on brush wiring board 233.This group of current transformer includes power current
Transformer 231 and HF current transformer 232.Power current transformer 231 and high frequency electric mutual inductance
Device 232 is arranged on printed substrate 233 each via the wrapping post 235 of oneself, in the reality of diagram
Executing in example, power current transformer 231 and HF current transformer 232 are respectively by two wrapping posts
235 the same sides being arranged on printed substrate 233, and power current transformer 231 and high-frequency electrical
Current transformer 232 is in being arranged above and below.The electricity required for hookup it is disposed with on printed substrate 233
Sub-components and parts, these electronic devices and components constitute hookup together.Key switch 234 is serially connected in test
In circuit, key switch 234 is switched on or switched off so that hookup connects or disconnects.Button
Switch 234 is arranged on printed substrate 233, and is linked in hookup by the pin of oneself.
With continued reference to shown in Fig. 3, also have a series of wiring hole or cable hole at printed substrate 233,
Including: first fairlead the 931, second fairlead 932, N pole wiring hole 933, L pole wiring hole
934, electrical apparatus release wiring hole 935.The concrete function of these fairleads and wiring hole will be explained below retouching
State.The arc fault detection chopper according to one embodiment of the invention is disclosed with reference to Fig. 2, Fig. 2
Cut-away view.Fig. 2 discloses the structure of the another side of printed substrate 233, as in figure 2 it is shown,
Arc fault detection device 102 also includes three of the wires: first wire the 901, second wire 902 and
Privates 903.One end of first wire 901 is connected to the coil in breaker body 101, the
The other end of one wire 901 passes high-frequency mutual inductor and the first fairlead 931, is then attached to from disconnected
Road device body 101 wiring L pole patch panel 110 out, L pole patch panel 110 is through the second lead-in wire
Hole 932.Second wire 902 is N pole power taking line, one end of the second wire 902 and breaker body
The N pole patch panel of 101 connects, and the other end of the second wire 902 is connected on printed substrate 233
N pole wiring hole 933.Privates 903 is L pole power taking line, and one end of privates 903 is even
Receive L pole patch panel 110, be also connected to the first wire 901, another of privates 903
The L pole wiring hole 934 that end is connected on printed substrate 233.
Fig. 4～Fig. 7 discloses in the arc fault detection chopper according to one embodiment of the invention and threads off
The structure of mechanism.Wherein Fig. 4 discloses the structure chart of tripping mechanism, and its center platen is illustrated, Fig. 5
Disclosing the structure chart of tripping mechanism, its center platen is concealed.With reference to shown in Fig. 4 and Fig. 5, thread off
Mechanism 104 includes electrical apparatus release 341, push rod the 342, first spring the 343, second spring 344, refers to
Show part 345 and pressing plate 346.Electrical apparatus release 341 is positioned at the first housing 107, in the embodiment of diagram
In, electrical apparatus release 341 is placed in the draw-in groove 171 in the first housing 107, the shape chi of draw-in groove 171
Very little mate with electrical apparatus release 341.In certain embodiments, draw-in groove 171 is together with the first housing 107
Molding, the draw-in groove 171 geomery when molding can set according to the geomery of electrical apparatus release 341
Fixed.Printed substrate 233 covers on electrical apparatus release 341 so that the position of electrical apparatus release 341 is fixed.
Two electrical apparatus release wiring that two lead-out wires of electrical apparatus release 341 are respectively welded on printed substrate 233
In hole 935.Although electrical apparatus release 341 is a part for tripping mechanism, but in other embodiments,
Assembling for convenience, electrical apparatus release 341 can be fixed on by wrapping post on printed substrate 233.
One end of electrical apparatus release 341 has telescopic push rod 331, and push rod 331 is towards push rod 342 place
Direction.In figures 4 and 5, push rod 342 on the right side of electrical apparatus release 341, therefore push rod 331
It is positioned at the right-hand member of electrical apparatus release 341.With reference to shown in Fig. 5, Fig. 5 center platen 346 is concealed to show former
First by the structure of 346 shield portions of pressing plate.Push rod 342 is placed on one group of the first housing 107 calmly
Between position protruding 172.In the embodiment shown in fig. 5, the first housing 107 has four location
Protruding 172, the position of four positioning convex 172 and the mating shapes of push rod 342, four
Positioning convex forms a limit channels, and four positioning convex contact with the outline of push rod 342,
Move in support push rod 342 direction that push rod 342 is only capable of along limit channels limits.In diagram
In embodiment, the top contact of two in four positioning convex 172 and push rod 342, two with push away
The bottom contact of bar 342, four positioning convex 172 define the spacing logical of a general horizontal direction
Road so that push rod 342 is only capable of moving in the horizontal direction, and in the vertical direction will not move.?
In other embodiment, the quantity of positioning convex can be more or less, the cloth set of positioning convex
The moving direction putting the shape with push rod and push rod is corresponding.There is on push rod 342 first work surface
351 and second work surface 352.First work surface 351 coordinates with the first spring 343, the second work
Face 352 coordinates with indication piece 245.First spring 343 is torsion spring, and the first spring 343 is enclosed within first
In first protruding shaft 173 of housing 107, an arm of the first spring 343 is fixed on the first housing 107
The 4th protruding shaft 174 on, another arm of the first spring 343 be fixed on push rod 342 first work
On face 351.Indication piece 345 is directed at the position at indication window 109 place on housing, and indication piece
The top of 345 is positioned by indication window 109 in being arranged on indication window 109.On first housing 107
Having installation protruding 175 on the position of corresponding indication piece 345, the second spring 344 is arranged on installation
On protruding 175.Indication piece 345 is hollow structure, installs projection 175 and the second spring 344 accommodates
In indication piece 345, the bottom of the second spring 344 is supported by installing protruding 175, the second spring
The top braces indication piece 345 of 344.In order to show the second spring 344 and install protruding 175, Fig. 4
In indication piece 345 be illustrated as open structure and be positioned at the structure within indication piece 345 to show.Ginseng
Examining Fig. 5, indication piece 345 has the leg 371 of extension, leg 371 downwardly extend and with push rod 342
The second work surface 352 coordinate.When leg 371 and the second work surface 352 contact with each other fixing,
The position of indication piece 345 in the vertical direction is fixed by push rod 342.
Tripping mechanism 104 also includes pressing plate 346, each in pressing plate 346 auxiliary disengaging mechanism 104
The assembling of parts, is additionally operable to support printed substrate 233.Fig. 6 and Fig. 7 discloses according to the present invention
An embodiment arc fault detection chopper in the structure chart of pressing plate of tripping mechanism, wherein Fig. 6
Disclosing the structure of pressing plate first, Fig. 7 discloses the structure of pressing plate second.As it can be seen, pressure
Plate 346 includes: plate body 501, instruction pressed part, push rod pressed part and positioning element.Instruction
Pressed part is positioned on plate body 501, and the position of instruction pressed part is corresponding with the position of indication piece 345.
Push rod pressed part is positioned on plate body 501, the position of push rod pressed part and the position pair of push rod 342
Should.Positioning element is positioned on plate body 501, and plate body is fixed on the first housing 107 by positioning element,
The position of positioning element also fixing circuit board assembly 103.In one embodiment, positioning element is several
Individual locating dowel, locating dowel extends to the both sides of plate body.In the embodiment shown in Fig. 6 and Fig. 7, plate
Three locating dowels it are disposed with: first locating dowel the 521, second locating dowel 522 and on the periphery of body 501
3rd locating dowel 523.The end of locating dowel is prominent axle or recessed hole, locating dowel end
Plate body is fixed on the housing of chopper by axle or hole.In the illustrated embodiment, the first locating dowel
521 and second first end of locating dowel 522 form the first recessed hole 531 and the second hole 532 respectively,
And the first end of the 3rd locating dowel 523 forms the 3rd prominent axle 533 (with reference to shown in Fig. 6).The
Second end of one locating dowel 521 and the second locating dowel 522 forms the first prominent axle 534 and respectively
Two axles 535, and the second end of the 3rd locating dowel 523 forms the 3rd recessed hole 536 (with reference to Fig. 7
Shown in).Several locating dowels coordinate with the first housing 107, and the first housing 107 has the axle of correspondence
Hole or protruding shaft.Axis hole coordinates with the axle of locating dowel end, and protruding shaft coordinates with the hole of locating dowel end.
It should be noted that the setting of the quantity of locating dowel, position and end is not limited by illustrating,
Can position and the suitable locating dowel of quantity, the end of locating dowel on plate body 501 as required
It is to select recessed hole or prominent axle can configure according to demand, as long as corresponding with on housing is convex
Axle or axis hole correspondence.Although additionally, locating dowel is simultaneously to plate body 501 in the embodiment of diagram
Both sides extend, in some embodiments, it is also possible to use monolateral locating dowel, i.e. at plate body 501
Not homonymy according to respective demand, locating dowel is set, the locating dowel on both sides is not necessarily to run through alignment.
With reference to shown in Fig. 6, in this embodiment, instruction pressed part is one or more projections 504.
The position of instruction pressed part is corresponding with the position of indication piece 345, and the effect of instruction pressed part is pressure
Indication piece 345 processed makes indication piece not have the deviation on position.In figure 6, instruction pressing part
Part is illustrated as two independent projections 504, in other examples, can (indicate as required
The shape of part) use single projection or greater number of projection.In this embodiment, instruction pressure
Parts processed are arranged in first of pressing plate 501, and in other embodiments, instruction pressed part can also
It is arranged as required to second at pressing plate 501.With continued reference to shown in Fig. 6, in this embodiment,
Push rod pressed part is one or more projections 506.The position of push rod pressed part and push rod 342
Position is corresponding, and the effect of push rod pressed part is that compacting push rod makes push rod 342 not have on position
Deviation.In figure 6, push rod pressed part is illustrated as single projection 506, in other enforcement
In example, (shape of push rod, size or position) multiple projection can be used as required.At this
In embodiment, push rod pressed part is arranged in first of pressing plate 501, in other embodiments, pushes away
Bar pressed part can also be arranged as required to second at pressing plate 501.
Having locating surface in locating dowel, the mutual flush of locating surface of several locating dowels, locating surface fixes line
The position of road plate.With reference to shown in Fig. 7, in this embodiment, the first locating dowel 521, second positions
Each there is on post 522 and the 3rd locating dowel 523 first locating surface the 551, second locating surface 552 and
3rd locating surface 553.First locating surface the 551, second locating surface 552 and the 3rd locating surface 553 are mutual
Flush, the plane that three locating surfaces are limited is for the printed substrate carrying in circuit board module
233 and limit the position of printed substrate 233.In the illustrated embodiment, the first locating surface 551,
Second locating surface 552 and the 3rd locating surface 553 are all in each locating dowel towards pressing plate 501 second
In the part that face extends, this setting is relevant with the installation site of printed substrate, and printed substrate is installed
At pressing plate second.If printed substrate is at first of pressing plate, then each locating surface is in location
Position on post can also correspondingly change.In one embodiment, plate body, instruction pressed part,
Push rod pressed part and positioning element are one-body molded, form single parts.Reality at other
Execute in example, it would however also be possible to employ the form assembled respectively will indicate pressed part, push rod pressed part and determine
Position parts are assembled on plate body.
Return to Fig. 5, except aforesaid first protruding shaft the 173, the 4th protruding shaft 174 on the first housing 107
Outward, also there is the second protruding shaft 177 and Triaxial hole 178.First location of the most corresponding pressing plate 501
Second hole 532 and the 3rd locating dowel 523 of first hole the 531, second locating dowel the first end of post the first end
3rd axle 533 of the first end.Protruding shaft coordinates with hole, axis hole coordinates with axle so that the of pressing plate 501
One side is located on the first housing 107.Though it is not illustrated, be appreciated that at the second housing 106
On have equally corresponding first locating dowel the second end first axle the 534, second locating dowel the second end
The axis hole of the 3rd control 536 of two axles 535 and the 3rd locating dowel the second end and protruding shaft so that pressing plate 501
The second face be located on the second housing 106.
With reference to Fig. 1 and Fig. 2, test button 105 includes the button cap 151 being positioned at outside shell and extends
Key body 152 to shell.In the illustrated embodiment, the shape of button cap 151 and chopper
Shell match.The shell of chopper is at this region camber.Button cap 151 is the most curved,
Form fit with the installation region of shell.With reference to Fig. 2, as elucidated before, key switch 234
It is arranged in circuit board module 103, specifically, is mounted on printed substrate 233, button
Switch 234 is connected to the hookup in circuit board module 103 by the pin of self so that button
Whether switch 234 can turn on by Control experiment circuit.As in figure 2 it is shown, key switch 234 and button
Body 152 aligns, and test button 105 is pressed, and key body 152 pushes down on key switch 234,
Trigger key switch 234 with call through test circuit.Test button 105 is released, key switch 234
The resetting-mechanism (such as spring or elastic component) relying on himself resets, and upwardly key body
152 so that test button 105 also resets.After key switch 234 resets, open test circuit.
Test button 105 and key switch 234 form test mechanism.Basis is disclosed with reference to Fig. 8, Fig. 8
The inside local structural graph of the arc fault detection chopper of another embodiment of the present invention.In Fig. 8 institute
In the embodiment shown, key switch is by torsion spring 821 and contact 822 replacement.Torsion spring 821 has fixing
Arm 811 and lever arm 812.Torsion spring 821 is enclosed within a protruding shaft of pressing plate or housing.Fixed arm
811 are fixed on the circuit board module 103 of chopper.On circuit board module 103, there is hookup.
Contact 822 also is located on circuit board module 103.Align with key body 152 in the end of lever arm 812,
Test button 105 is pressed, 152 times pressure lever arms 812 of key body so that lever arm 812 is with tactile
Point 822 contact.Fixed arm 811 is linked in hookup, and contact 822 is also coupled to hookup
In, torsion spring 821, from conducting electricity as metal structure, therefore contacts with fixed arm 811 when contact 822
Time, hookup is switched on.Test button 105 is released, and the spring of torsion spring 821 is vertical makes activity
Arm 812 resets, and lever arm 812 resets upwardly key body 152 so that test button 105 is also
Reset.After lever arm 812 resets, lever arm disconnects with contact so that hookup is disconnected.Examination
Test button 105, torsion spring 821 and contact 822 and form test mechanism.
With continued reference to Fig. 2, the printed substrate 233 in circuit board module 103 is by the first housing 107
On four projections 179 and first locating surface the 551, second locating surface 552 on pressing plate and the 3rd fixed
Plane 553 positions jointly.As in figure 2 it is shown, four projections 179 are along the foreign steamer of the first housing 107
Wide distribution, lays respectively at both sides and the bottom of the first housing 107.At the second housing 106, i.e. lid with
After first housing 107 completes assembly, printed substrate 233 is fixed in housing.
The work process of this arc fault detection chopper is as follows:
When normally working, circuit does not have electric arc, circuit board module 103 can't detect in circuit
There is electric arc.Arc fault detection chopper is in normal operating conditions.Each in tripping mechanism 104
Individual parts are in the position shown in Fig. 4 and Fig. 5.The push rod 331 of electrical apparatus release 341 is in contraction state,
Do not contact with push rod 342.Push rod 342 is positioned in shown in Fig. 5 under the effect of the first spring 343
Position.The leg 371 of indication piece 345 contacts with each other with the second work surface 352 on push rod 342
Fixing, the position of indication piece 345 in the vertical direction is fixed by push rod 342.The top of indication piece 345
Portion is without departing from the indication window 109 on shell.It is positioned at the second spring 344 within indication piece 345
In compressed energy-storage state.
When circuit produces arc fault, the power current transformer 231 in circuit board module 103
With power frequency component and the high-frequency signal that HF current transformer 232 detects electric current in circuit, according to work
Frequently signal and high-frequency signal, utilizes amplifying circuit and single-chip microcomputer that signal is carried out Treatment Analysis, thus sentences
Break and on circuit, there is arc fault.Circuit board module 103 controls electrical apparatus release 341 and threads off.Electrical apparatus release
After 341 thread off, push rod 331 stretches out, and is backed down to the right by push rod 342.Push rod 331 overcomes first
The spring force of spring 343 makes push rod 342 move to the right.After push rod 342 moves to the right, one
Aspect promotes the release lever dropout (not shown) in breaker body 101 so that chopper is cut
Broken string road.On the other hand, after push rod 342 moves right, the leg 371 of indication piece 345 and push rod
The second work surface 352 on 342 separates.Second spring 344 is released and can be upspring so that indication piece 345
Pop up, beyond indication window 109, indicate trip status.
After arc fault is got rid of, the push rod 331 of electrical apparatus release 341 shrinks.Press indication piece 345, push away
Bar 342 returns to the position shown in Fig. 5 under the effect of the spring force of the first spring 343.Indication piece
The leg 371 of 345 again contacts fixing with the second work surface 352 on push rod 342.Arc fault
Detection miniature circuit breaker turns again to normal operating conditions.
The arc fault detection chopper of the present invention has the structure of integration, uses internal cabling power taking
Mode, compact conformation, good looking appearance, external interference resistance is strong.
Above-described embodiment is available to be familiar with person in the art and realizes or use the present invention, ripe
Know those skilled in the art can without departing from the present invention in the case of the inventive idea above-described embodiment be done
Go out various modifications or change, thus protection scope of the present invention is not limited by above-described embodiment, and answer
This is the maximum magnitude meeting the inventive features that claims are mentioned.
Claims (10)
1. an arc fault detection chopper, it is characterised in that including: housing, be contained in housing
In breaker body and arc fault detection device；
Described arc fault detection device includes circuit board module and tripping mechanism, and circuit board module is with de-
Buckle mechanism is positioned in housing；
Arc fault in circuit board module detection circuit, circuit board module detects and there is electricity in circuit
Arc fault, circuit board module controls tripping mechanism and threads off and indicate.
2. such as claim 1 arc fault detection chopper, it is characterised in that described circuit board module
Including printed substrate and installation current transformer on a printed-wiring board, described current transformer bag
Include power current transformer and HF current transformer.
3. such as claim 2 arc fault detection chopper, it is characterised in that described current transformer
Including one group or array, the current transformer of each group includes power current transformer and high frequency electric
Transformer, the current transformer of same group is disposed in the same side of printed substrate；
Power current transformer and HF current transformer are arranged on printed substrate each via wrapping post
On, power current transformer and HF current transformer are in being arranged above and below.
4. such as claim 2 arc fault detection chopper, it is characterised in that open on printed substrate
There are wiring hole or cable hole, including: the first fairlead, the second fairlead, N pole wiring hole, L
Pole wiring hole, electrical apparatus release wiring hole；
Described arc fault detection device also includes wire: the first wire, the second wire and privates；
One end of first wire is connected to the coil in breaker body, and the other end of the first wire passes
High-frequency mutual inductor and the first fairlead, be then attached to from breaker body wiring L pole wiring out
Plate, L pole patch panel passes the second fairlead；
Second wire is N pole power taking line, one end of the second wire and the N pole patch panel of breaker body
Connect, the N pole wiring hole that the other end of the second wire is connected on printed substrate；
Privates is L pole power taking line, and one end of privates is connected to L pole patch panel, the most also
It is connected to the first wire, the L pole wiring hole that the other end of privates is connected on printed substrate.
5. such as claim 2 arc fault detection chopper, it is characterised in that described tripping mechanism bag
Include: electrical apparatus release, push rod, the first spring, the second spring, indication piece and pressing plate, described printed wire
Plate is covered on tripping mechanism；
Electrical apparatus release is arranged in housing, and electrical apparatus release has push rod；
Push rod is arranged in housing by positioning convex, and positioning convex forms the limit channels of push rod；
First spring is arranged in housing, the position of the first spring localization handspike；
Indication piece is arranged in the indication window on housing, and the second spring is positioned at indication piece and is arranged on
On housing；
Pressing plate is pushed down described push rod, the first spring and indication piece, pressing plate and is also supported described printed substrate.
6. such as claim 5 arc fault detection chopper, it is characterised in that
Push rod has the first work surface and the second work surface；
First spring is torsion spring, and the first spring is arranged on housing, and an arm of the first spring is fixed on
On housing, another arm of the first spring is fixed on the first work surface of push rod；
Indication piece has the leg of extension, and leg coordinates with the second work surface of push rod, leg and second
Work surface contacts with each other fixing, and the position of indication piece in the vertical direction is fixed by push rod.
7. such as claim 6 arc fault detection chopper, it is characterised in that
Not having electric arc in circuit, circuit board module can't detect and there is electric arc in circuit, the top of electrical apparatus release
Bar shrinks, and push rod does not contacts with push rod, and push rod is positioned by the first spring, the leg of indication piece and push rod
On the second work surface contact with each other fixing, the top of indication piece without departing from the indication window on shell,
Second spring-compressed energy storage.
8. such as claim 7 arc fault detection chopper, it is characterised in that
Producing arc fault in circuit, power current transformer and high frequency electric in circuit board module are mutual
The power frequency component of the electric current in sensor detection circuit and high-frequency signal, according to power frequency component and high-frequency signal
Judging to exist on circuit arc fault, circuit board module controls electrical apparatus release and threads off, the push rod of electrical apparatus release
Stretching out, push rod promotes push rod, and push rod overcomes the spring force of the first spring that push rod is moved, indication piece
Leg separate with the second work surface on push rod, the second spring is released and can be upspring, and indication piece pops up,
Beyond indication window to indicate trip status.
9. arc fault detection chopper as claimed in claim 1, it is characterised in that arc fault
Detection device also includes test mechanism, and circuit board module is tested by test mechanism；
Described test mechanism includes test button and key switch, and wherein test button is arranged on housing,
Key switch is arranged on circuit board module；Or
Described test mechanism includes test button, torsion spring and contact, and wherein test button is arranged on housing
On, torsion spring and contact are arranged on circuit board module.
10. arc fault detection chopper as claimed in claim 1, it is characterised in that described shell
Body includes the first housing and the second housing, and one of them of the first housing and the second housing is base, another
One is lid, forms described housing after the first housing and the splicing of the second housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334918.9A CN105845514A (en) | 2016-05-19 | 2016-05-19 | Arc fault detection circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334918.9A CN105845514A (en) | 2016-05-19 | 2016-05-19 | Arc fault detection circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105845514A true CN105845514A (en) | 2016-08-10 |
Family
ID=56592969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610334918.9A Pending CN105845514A (en) | 2016-05-19 | 2016-05-19 | Arc fault detection circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105845514A (en) |
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| CN109216069A (en) * | 2017-07-07 | 2019-01-15 | 通用电气公司 | Breaker including active arc controlling feature |
| CN110473747A (en) * | 2019-07-03 | 2019-11-19 | 威胜电气有限公司 | A kind of breaker and breaker operator recognition methods |
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Application publication date: 20160810 |