CN203038862U

CN203038862U - Modular low-voltage plastic shell circuit breaker

Info

Publication number: CN203038862U
Application number: CN 201220737287
Authority: CN
Inventors: 刘洪武; 顾建青; 陈红影; 王铖
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2013-07-03
Anticipated expiration: 2022-12-28

Abstract

The utility model provides a modular low-voltage plastic shell circuit breaker, belonging to the technical field of low-voltage electrical appliances. The modular low-voltage plastic shell circuit breaker comprises a housing, an operating mechanism contained in the housing, movable contact assemblies whose quantity is same with the quantity of poles of the circuit breaker, releasing devices which comprise magnetic releasers and heat releasers, wiring terminals which comprise first wiring terminals and second wiring terminals, static contact assemblies and arc-extinguishing devices. The circuit breaker is characterized in that the circuit breaker also comprises bases whose quantity is same with the quantity of the poles of the circuit breaker, the above releasing devices, the wiring terminals, the static contact assemblies and the arc-extinguishing devices are arranged on the bases respectively to form a single-pole module unit respectively, a first wiring terminal and a second wiring terminal are arranged at two ends of each of the bases, the magnetic releasers are above the arc-extinguishing devices, each of the heat releasers is positioned at one side of each of the magnetic releasers close to a second wiring terminal, and each of the static contact assemblies is positioned at one side of each of the magnetic releasers close to a first wiring terminal. The modular low-voltage plastic shell circuit breaker has the advantages that the assembly efficiency is raised, the size of the housing of the circuit breaker in the length direction is shortened obviously, and the circuit breaker can meet a miniaturization trend.

Description

The modular low-voltage breaker of plastic casing

Technical field

The utility model belongs to the low voltage electrical apparatus technology field, is specifically related to a kind of modular low-voltage breaker of plastic casing

Background technology

Circuit breaker is formed by being arranged at main circuit loop, arc-control device and the operating mechanism that shell or title mould in the shell, and circuit breaker is one pole or multipole normally, and the main circuit loop of each utmost point is made of binding post, trip gear and contact apparatus.Because the structure of each utmost point of multipole circuit breaker is similar or even identical, therefore with one pole with standardization and with modular version design and make can significantly reduce cost and use embody relatively cheap.

China utility model patent Granted publication CN101241820B recommends that " single-pole modular low-voltage breaker " arranged, and this patent scheme all is designed to modularization with contact apparatus, arc-control device, operating mechanism and trip gear (thermal release device and/or magnetic trip gear).The circuit breaker of this version has the positive effect that helps part management and inventory optimization customization, specifically can be referring to the 5th page of the 9th to 19 row of specification of this patent.

There is the shortcoming of following two aspects in above-mentioned CN101241820B: once being its version, because the contact apparatus of each utmost point and arc-control device individual packages constitute the contact arc-extinguishing module, operating mechanism is installed in wherein on the utmost point contact arc-extinguishing module, trip gear module and contact arc-extinguishing module are successively along the length direction setting of circuit breaker, make trip gear module and arc-control device on the length direction of circuit breaker, install side by side, thereby this structure configuration mode has determined the size of circuit breaker length direction further to effectively reduce; The 2nd, with regard to its assembling form, the assemble sequence of inner each module of circuit breaker is: each utmost point contact arc-extinguishing module is at first packed in the shell, assembly manipulation mechanism then, the shell of at last the trip gear module being packed into, because contact arc-extinguishing module and operating mechanism have occupied the segment space in the shell, and for the reliability that guarantees the circuit breaker tripping separating brake and the miniaturization of satisfying circuit breaker, draw bar on the operating mechanism should be as far as possible near the trip gear module, thereby make draw bar occupy the assembly space of part trip gear module, therefore, need adjust angle during assembling trip gear module and use the draw bar of avoiding on the operating mechanism, the shell of earlier binding post on the trip gear module being packed into, again with the whole headspace that falls into shell after the trip gear module change angle, at last, with screw every utmost point contact arc-extinguishing module is fastenedly connected with corresponding trip gear, as seen this assembling mode lengthy and tedious complexity not only, and the assembler who requires circuit breaker has enough assembling experiences, is difficult to improve efficiency of assembling.

In view of above-mentioned prior art, be necessary rationally to be improved, for this reason, the applicant has done positive and useful design, has formed technical scheme described below finally

Summary of the invention

Task of the present utility model is to provide a kind of being conducive to embody operating mechanism, arc-control device, the quick installation of trip gear and contact apparatus and use the raising efficiency of assembling, helping avoid the length direction that trip gear and arc-control device are being followed circuit breaker arranges and installs and use the size of the length direction that significantly dwindles circuit breaker, the overall volume that ensures circuit breaker more becomes miniaturization and uses the modular low-voltage breaker of plastic casing that take up room of saving circuit breaker under the use state.

Task of the present utility model is finished like this, a kind of modular low-voltage breaker of plastic casing, comprise shell, be contained in the operating mechanism in the shell, the moving contact component that quantity equates with the number of poles of circuit breaker, the trip gear that comprises magnetic release and thermal overload release, the binding post that comprises first binding post and second binding post, fixed contact assembly and arc-control device, it is characterized in that: also include the pedestal that quantity equates with the number of poles of described circuit breaker, above-mentioned trip gear, binding post, fixed contact assembly and arc-control device all are arranged on the pedestal, constitute an one pole modular unit, wherein, first binding post and the second binding post branch are located at the two ends of pedestal, magnetic release is positioned at the top of arc-control device, thermal overload release is positioned at the side near second binding post of magnetic release, and the fixed contact assembly is positioned at the side near first binding post of magnetic release.

In a specific embodiment of the present utility model, described shell comprises the lid and bottom seat that cooperatively interacts, moving contact component comprises first contact arm and second contact arm, the fixed contact assembly comprises first fixed contact and second fixed contact that cooperates with second contact arm that cooperate and be connected with first binding post with first contact arm, arc-control device comprises first arc-control device of corresponding described first fixed contact and second arc-control device of corresponding described second fixed contact, wherein, second fixed contact is electrically connected with magnetic release, magnetic release is electrically connected with thermal overload release, and thermal overload release is electrically connected with second binding post; Pedestal is provided with the magnetic release lock chamber, the arc-control device containing cavity, the thermal overload release lock chamber, contact arm container cavity and exhaust passage, wherein, magnetic release lock chamber and arc-control device containing cavity are separated by second laminate that extends along the circuit breaker length direction that constitutes on the pedestal, thermal overload release lock chamber and exhaust passage are separated by the three ply board that is the inclined-plane that constitutes on the pedestal, the contact arm container cavity forms every establishing by first laminate and the binding post dividing plate that extend along the circuit breaker short transverse that constitutes on the pedestal, first laminate, second laminate and three ply board are connected successively, one end of arc-control device grid spacer and first laminate, second laminate and three ply board are connected, the other end of arc-control device grid spacer is connected with the binding post dividing plate, by the arc-control device grid spacer with the arc-control device containing cavity, contact arm container cavity and exhaust passage are respectively every being set as the first arc-control device containing cavity and the second arc-control device containing cavity that is set up in parallel, the first contact arm container cavity and the second contact arm container cavity, first exhaust passage and second exhaust passage, first fixed contact and second fixed contact are separately fixed at the two ends of first laminate.

In another specific embodiment of the present utility model, the two ends of described three ply board constitute the chamber wall to the extension of base direction respectively, and the exhaust passage is separated into first exhaust passage and second exhaust passage with the exhaust passage between three ply board and chamber wall and by the arc-control device grid spacer.

In another specific embodiment of the present utility model, it is characterized in that: a side of the magnetic release lock chamber length direction on described pedestal is provided with a wall body, described wall body all is connected with first laminate and second laminate, and constitute grab and limiting stand on the wall body, by this grab and limiting stand magnetic release is fixed in the magnetic release lock chamber of pedestal.

In another specific embodiment of the present utility model, offer first notch and second notch on described first laminate, first fixed contact engages with first notch, and second fixed contact engages with second notch.

Also have in the specific embodiment of the present utility model, described binding post dividing plate is connected with first laminate by connecting dividing plate, thus the connecting portion that envelope first binding post is connected with first fixed contact.

More of the present utility model and in specific embodiment, described three ply board is extended with the second binding post fixed head, fixes by screw with the second binding post fixed head after the second binding post bending.

In of the present utility model and then specific embodiment, described first arc-control device comprise first arc-chute, be connected with first fixed contact first on run-on tab, first time run-on tab, place near the first U-shaped assembly first arc-chute, this first time run-on tab comprise the first end that places first arc-chute below, from the first thin foot that first end extends, this first U-shaped assembly is made of with first magnet plate that is installed on the first U-shaped working of plastics both sides first a U-shaped working of plastics that is installed in the first thin foot; Second arc-control device comprises second arc-chute, be connected with second fixed contact second on run-on tab, second time run-on tab, place near the second U-shaped assembly of second arc-chute, this second time run-on tab comprises the second end that places second arc-chute below, from the second thin foot that the second end extends, this second U-shaped assembly is made of with second magnet plate that is installed on the second U-shaped working of plastics both sides second a U-shaped working of plastics that is installed in the second thin foot, the first thin foot is connected by connecting portion with the second thin foot, the lower position of the both sides of arc-control device grid spacer and corresponding magnetic release lock chamber constitutes card base in the position near first laminate, position at the close base away from first laminate constitutes card base, the end of the close binding post dividing plate of arc-control device grid spacer offers bayonet socket, last card base be used for first on the run-on tab and second run-on tab engage, following card base is used for engaging with first end and the second end, and bayonet socket engages with the middle part of connecting portion.

The technical scheme that the utility model provides is owing to set up the pedestal that equates with the number of poles of circuit breaker, the trip gear of each utmost point of circuit breaker, binding post, fixed contact assembly and arc-control device are that carrier is installed and constituted an one pole modular unit with the pedestal of each utmost point respectively, therefore can not interference situations occur when assembling and can improve efficiency of assembling; And owing to set up the pedestal that equates with the number of poles of circuit breaker, thereby trip gear and the arc-control device of each utmost point of circuit breaker are satisfied upper and lower stacked installation requirement at pedestal, can significantly shorten the size of length direction of the shell of circuit breaker, thereby circuit breaker shared space under the use state is dwindled, can meet the circuit breaker trend toward miniaturization.

Description of drawings

Fig. 1 is the package assembly schematic diagram of the utility model modular low-voltage breaker of plastic casing.

Fig. 2 is the schematic diagram after Fig. 1 assembling.

Fig. 3 is installed on the schematic diagram that forms on the pedestal by one pole modular unit shown in Figure 2 for trip gear, binding post, fixed contact assembly and arc-control device.

Fig. 4 is the assembling schematic diagram of one pole modular unit shown in Figure 2.

Fig. 5 a is the schematic diagram of pedestal.

Fig. 5 b is the rearview of Fig. 5 a.

Fig. 5 c is the bottom schematic view of pedestal.

Embodiment

See also Fig. 1 to Fig. 4, provided shell 1: be contained in operating mechanism 2 in the shell, moving contact component 3, quantity and circuit breaker number of poles corresponding trip gear 4, binding post 5, fixed contact assembly 6, arc-control device 7 and the quantity pedestal 8 identical with the circuit breaker number of poles.Operating mechanism 2 is used for driving moving contact component 3 with fixed contact assembly 6 closures or separates.

The number of poles of circuit breaker can be one pole, two utmost points, three utmost points, four utmost points, and following description is example at three utmost point breaker of plastic casing.

Show that as Fig. 2 shell 1 comprises base 11 and lid 12, base 11 is provided with two interpolars and shows every 111(Fig. 1), thus each utmost point of corresponding circuit breaker with base 11 every setting out three spaces, an one pole modular unit 10 by Fig. 2 signal is set in each space.

Moving contact component 3 comprises three moving contacts, and each moving contact has first contact arm 31 and second contact arm 32 that is parallel to each other.

Three trip gears 4, namely the trip gear 4 of each utmost point comprises a magnetic release 41 and a thermal overload release 42, magnetic release 41 comprises coil 411, assembly unshakable in one's determination 412, metallic support 413 and actuator lever 414.Hot trip unit 42 comprises bimetal plate bracket 421, bimetal leaf 422 and adjustment screw 423, as Fig. 3, coil 411 is electrically connected with bimetal leaf 422, and coil 411 can use copper metal knitted line to be connected with bimetal leaf 422 or directly connect with copper metalwork 415.

Three binding posts 5, the binding post 5 of each utmost point comprises first binding post 51 and second binding post 52, second binding post 52 is electrically connected with bimetal leaf 422, preferably, second binding post 52 uses copper metal knitted line 424 to be connected with bimetal plate bracket 421, as Fig. 3, coil 411, thermal overload release 42, second binding post 52 also can connect like this: coil 411 uses copper metal knitted line to be connected with bimetal leaf 422 or directly connects with copper metalwork 415, and second binding post 52 directly welds with bimetal leaf 422.

Three fixed contact assemblies 6, the fixed contact assembly 6 of each utmost point comprises first fixed contact 61 that is connected with first binding post 51 and second fixed contact 62 that is connected with coil 411, first fixed contact 61 contacts with first contact arm 31 or separates, second fixed contact 62 contacts with second contact arm 32 or separates, and coil 411 and second fixed contact 62 directly are welded to connect.

Three arc-control devices 7, the arc-control device 7 of each utmost point comprise corresponding to first arc-control device 71 of first fixed contact 61 with corresponding to second arc-control device 72 of second fixed contact 62; First arc-control device 71 comprises first arc-chute 711, be connected with first fixed contact 61 first on run-on tab 712, first time this first time run-on tab 713 of run-on tab 713(comprises the first end 7131 that places first arc-chute, 711 belows, from the first thin foot 7132 that first end 7131 extends), place near first arc-chute, 711 these first U-shaped assemblies 714 of the first U-shaped assembly 714(to be constituted with first magnet plate 7142 that is installed on the first U-shaped working of plastics, 7141 both sides by first a U-shaped working of plastics 7141 that is installed in the first thin foot 7132); Second arc-control device 72 comprises second arc-chute 721, be connected with second fixed contact 62 second on run-on tab 722, second time this second time run-on tab 723 of run-on tab 723(comprises the second end 7231 that places second arc-chute, 721 belows, from the second thin foot 7232 that the second end 7231 extends), place near second arc-chute, 721 these second U-shaped assemblies 724 of the second U-shaped assembly 724(to be constituted with second magnet plate 7242 that is installed on the second U-shaped working of plastics, 7241 both sides by second a U-shaped working of plastics 7241 that is installed in the second thin foot 7232), the first thin foot 7132 is connected by connecting portion 703 with the second thin foot 7232.

See also Fig. 5 a, Fig. 5 b and in conjunction with Fig. 4, three pedestals 8, the trip gear 4 of each utmost point, binding post 5, fixed contact assembly 6 and arc-control device 7 all are assemblied on the pedestal 8, thereby constitute one pole modular unit 10, wherein, first binding post 51 and second binding post were located at the two ends of pedestal 8 in 52 minutes, magnetic release 41 is positioned at the top of arc-control device 7, thermal overload release 42 is positioned at the side near second binding post 52 of magnetic release 41, and fixed contact assembly 6 is positioned at the side near first binding post 51 of magnetic release 41.

Pedestal 8 is provided with magnetic release lock chamber 81, arc-control device containing cavity 82, thermal overload release lock chamber 83, contact arm container cavity 84 and exhaust passage 85, wherein, magnetic release lock chamber 81 and arc-control device containing cavity 82 are separated by second laminate 802 that extends along the circuit breaker length direction that constitutes on the pedestal 8, thermal overload release lock chamber 83 and exhaust passage 85 are separated by the three ply board 803 that is the inclined-plane that constitutes on the pedestal 8, contact arm container cavity 84 forms every establishing by first laminate 801 and the binding post dividing plate 804 that extend along the circuit breaker short transverse that constitutes on the pedestal 8, first laminate 801, second laminate 802 and three ply board 803 are connected successively, one end of arc-control device grid spacer 805 and first laminate 801, second laminate 802 and three ply board 803 are connected, the other end of arc-control device grid spacer 805 is connected with binding post dividing plate 804, be arc-control device grid spacer 805 be formed in first laminate 801 towards a side of binding post dividing plate 804 and the side towards base 11 of second laminate 802 and three ply board 803, and be positioned at the middle position of the Width of magnetic release lock chamber 81 and thermal overload release lock chamber 83, from shape of cross section, arc-control device grid spacer 805 and first laminate 801, second laminate 802 and three ply board 803 form the relation of the T font of English alphabet, by arc-control device grid spacer 805 with arc-control device containing cavity 82, contact arm container cavity 84 and exhaust passage 85 are respectively every being set as the first arc-control device containing cavity 821 and the second arc-control device containing cavity 822 that is set up in parallel, the first contact arm container cavity 841 and the second contact arm container cavity 842, first exhaust passage 851 and second exhaust passage, 852, the first fixed contacts 61 and second fixed contact 62 are separately fixed at the two ends of first laminate 801.

The utility model preferably is provided with a wall body 811 in a side of magnetic release lock chamber 81 length directions on pedestal 8, described wall body 811 all is connected with first laminate 801 and second laminate 802, and constitute grab 8111 and limiting stand 8112 on the wall body 811, cooperation by this grab 8111 and limiting stand 8112 and aforementioned metal support 413 is fixed on magnetic release 41 in the magnetic release lock chamber 81 of pedestal 8, certainly, of the present utility model magnetic release 41 is fixed on is not limited to the said fixing mode in the magnetic release lock chamber 81, also can position limiting structure be set at second laminate 802 or first laminate 801 magnetic release 41 is fixed.

The utility model preferably is provided with a fixing wall body 831 in a side of the thermal overload release lock chamber 83 on pedestal 8, with the bimetal plate bracket 421 of thermal overload release 42 by screw and fixedly wall body 831 is fixing, thereby thermal overload release 42 is fixed in the thermal overload release lock chamber 83.Certainly, of the present utility model thermal overload release 42 is fixed on is not limited to the said fixing mode in the thermal overload release lock chamber 83, for the thermal overload release 42 that does not have bimetal plate bracket 421, then by copper metalwork 415 and second binding post 52 thermal overload release 42 is supported in the thermal overload release lock chamber 83.

Shown in Fig. 5 a, b, c, offer one first notch 8011 respectively at the two ends of first laminate 801 and second notch, 8012, the first fixed contacts 61 embed and are positioned on first notch 8011, second fixed contact 62 embeds also and is positioned on second notch 8012.

The utility model preferably extends formation chamber wall 806 to the direction of base 11 respectively with the two ends of three ply board 803, exhaust passage 85 is separated into first exhaust passage 851 and second exhaust passage 852 with exhaust passage 85 between three ply board 803 and chamber wall 806 and by arc-control device grid spacer 805, make chamber wall 806 and being connected of three ply board 803 replaced circuit breaker base 11 inwalls or interpolar every 111 with the cooperating of three ply board 803, and make 85 of exhaust passages have extraneous (case for circuit breaker 1 outside) outlet, circuit breaker is in disjunction fault current process, can produce electric arc between moving contact component 3 and the fixed contact assembly 6, a large amount of high temperature, the arcing gas of high pressure metal ion enters exhaust passage 85, and 85 draw through the exhaust passage.

The utility model preferably constitutes card base 8051 in the both sides of arc-control device grid spacer 805 and the lower position of corresponding magnetic release lock chamber 81 in the position near first laminate 801, position at the close base 11 away from first laminate 801 constitutes card base 8052, the end of the close binding post dividing plate 804 of arc-control device grid spacer 805 offers bayonet socket 8053, last card base 8051 be used for first on the run-on tab 712 and second run-on tab 722 engage, following card base 8052 is used for engaging with first end 7131 and the second end 7231, and bayonet socket 8053 engages with the middle part of connecting portion 703.Be provided with a series of restriction protrusion 8055 in the both sides of arc-control device grid spacer 805 and the position of close three ply board 803, restriction protrusion 8055 is used for carrying out spacing to first arc-chute 711 and second arc-chute 721.Thereby first arc-control device 71 is configured in the first arc-control device containing cavity 821, second arc-control device 72 is configured in the second arc-control device containing cavity 822, simultaneously, the relative position that keeps first arc-chute 71, second arc-chute 72 and arc-control device grid spacer 805.

First contact arm 31 of moving contact component 3 and second contact arm 32 probe into respectively by first laminate 801, interpolar every 111 or the space that becomes of inwall, binding post dividing plate 804 and the arc-control device grid spacer 805 bag lattice of base 11 in, namely the first contact arm container cavity 841 and the second contact arm container cavity 842 cooperate with fixed contact 61,62.Shown in Fig. 5 a, arc-control device grid spacer 805, first laminate 801, second laminate 802, three ply board 803, binding post dividing plate 804 and interpolar every 111 or the inwall of base 11 constituted the contact arm container cavity 84, arc-control device containing cavity 82 and the exhaust passage 85 that are communicated with successively, for the generation of electric arc, extinguish, the discharging of the free gas that finally disappears provides an independent confined space, prevents that electric arc from having a negative impact to trip gear 4.The top of arc-control device grid spacer 805 constitutes a baffle plate 8054, and the width of baffle plate 8054 is used for first fixed contact 61 and second fixed contact 62 are insulated greater than the thickness of arc-control device grid spacer 805, increases creepage distance and electric clearance.

Thereby binding post dividing plate 804 connects the connecting portion 511 that envelope first binding post 51 is connected with first fixed contact 61 with first laminate 801 by being connected dividing plate 8041, is used for the insulation to first contact arm 31 and connecting portion 511, increases creepage distance and electric clearance.

First binding post 51 is connected with first fixed contact 61, and connecting portion 511 is copper metalwork, and therefore, first binding post 51 is realized relative fixed with binding post dividing plate 804 by first fixed contact 61 and engaging of first notch 8011.Three ply board 803 is extended with after 52 bendings of the second binding post fixed head, 8031, the second binding posts with the second binding post fixed head 8031 and fixes by screw.

The utility model also can arrange baffle plate between arc-control device containing cavity 82 and exhaust passage 85, baffle plate cooperates with the buckle 8056 that arranges on the arc-control device grid spacer 805 of the form of patching and pedestal 8 as separate part, baffle plate is that an end is offered porose platy structure, its installation can arrange up for an end that will have the hole or down, different mounting meanss is used for adjusting the path that arc control device lead to the exhaust passage, even arcing gas has different gas channels.

The trip gear 4 of each utmost point, binding post 5, fixed contact assembly 6, arc-control device 7 are assemblied on the pedestal 8, and magnetic release 41 is positioned at magnetic release lock chamber 81, arc-control device 7 is positioned at the bottom of magnetic release lock chamber 81, and corresponding to aforementioned arc-control device dividing plate 802 being installed installs, more particularly, first, second arc-chute 71 of the magnetic release 41 of trip gear 4 and arc- control device 7,72 stacked on the circuit breaker short transverse.

Three one pole modular units 10 be contained in respectively base 11 by interpolar every 111 in setting out three spaces; The upside of a utmost point one pole modular unit 10 in the middle of operating mechanism 2 is installed in, operating mechanism 2 is connected with moving contact component 3; First contact arm 31 of moving contact component 3 and second contact arm 32 probe into respectively by first laminate 801, arc-control device grid spacer 805, binding post dividing plate 804, interpolar every 111 or the space of the inwall Bao Gecheng of base 11 in, cooperate with first, second fixed contact 61,62.One pole modular unit 10 bottoms offer fixing hole 80, and screw passes the screw hole of base 11, be screwed in the fixing hole 80, thereby one pole modular unit 10 is fixed on the base 11.Three one pole modular units 10 of the present utility model can be fixed to earlier in the base 11 by the one pole modular unit 10 that first utmost point and the 3rd is extremely corresponding, then that operating mechanism 2 is corresponding with interpole one pole modular unit 10 fixes, and then the one pole modular unit 10 that the interpole correspondence of operating mechanism 2 will fixedly be arranged is fixed in the base 11, certainly, mounting means of the present utility model also can for: earlier that each is extremely corresponding one pole modular unit 10 is respectively fixed in the base 11, again operating mechanism 2 is erected at one pole modular unit 10 tops of interpole correspondence, with screw the location hole that arranges on operating mechanism 2 side plates and the location hole on the base 11 are fixed then, complete operation mechanism 2 is fixing with base 11.

The utility model is by arranging the quantity pedestal 8 identical with the circuit breaker number of poles in described modularization low-pressure plastic shell circuit breaker, trip gear 4 with each utmost point, binding post 5, fixed contact assembly 6, arc-control device 7 all is assemblied on the pedestal 8, magnetic release 41 is positioned at magnetic release lock chamber 81, arc-control device 7 is corresponding to the below of magnetic release lock chamber 81, make magnetic release 41 and first of arc-control device 7, second arc- chute 71,72 show as stacked relation in the circuit breaker short transverse, make the operating mechanism 2 of circuit breaker, magnetic release 41 roughly is being on the space layout with arc-control device 7, in, following stacked structure, the horizontal topology layout of magnetic trip gear and arc extinguishing grid pieces level in the prior art of comparing, can reduce the size of circuit breaker length direction, realize short and smallization of circuit breaker; Arc-control device and trip gear are incorporated in the one pole modular unit 10, as long as when assembling this module whole is fit in the base 11 of circuit breaker from top to bottom, and needn't be the installation headspace of trip gear again, and assembling is simple; Further, at a plurality of function parts of single pedestal 8 configurations, constitute one pole modular unit 10, be beneficial to control, guarantee the quality of fit between the part, and, arc-control device and trip gear are integrated into a standalone module, reduced the standard module quantity of circuit breaker, the standard module functional integration is higher, and modularization is assembled easyly, is beneficial to the stock control of parts

Claims

1. A kind of modular low-voltage breaker of plastic casing, comprise shell (1), be contained in the operating mechanism (2) in the shell (1), the moving contact component (3) that quantity equates with the number of poles of circuit breaker, the trip gear (4) that comprises magnetic release (41) and thermal overload release (42), the binding post (5) that comprises first binding post (51) and second binding post (52), fixed contact assembly (6) and arc-control device (7), it is characterized in that: also include the pedestal (8) that quantity equates with the number of poles of described circuit breaker, above-mentioned trip gear (4), binding post (5), fixed contact assembly (6) and arc-control device (7) all are arranged on the pedestal (8), constitute an one pole modular unit (10), wherein, first binding post (51) and second binding post (52) divide the two ends that are located at pedestal (8), magnetic release (41) is positioned at the top of arc-control device (7), thermal overload release (42) is positioned at the side near second binding post (52) of magnetic release (41), and fixed contact assembly (6) is positioned at the side near first binding post (51) of magnetic release (41).

2. Modular low-voltage breaker of plastic casing according to claim 1, it is characterized in that: described shell (1) comprises lid (12) and the base (11) that cooperatively interacts, moving contact component (3) comprises first contact arm (31) and second contact arm (32), fixed contact assembly (6) comprises first fixed contact (61) and second fixed contact (62) that cooperates with second contact arm (32) that cooperate and be connected with first binding post (51) with first contact arm (31), arc-control device (7) comprises first arc-control device (71) of corresponding described first fixed contact (61) and second arc-control device (72) of corresponding described second fixed contact (62), wherein, second fixed contact (62) is electrically connected with magnetic release (41), magnetic release (41) is electrically connected with thermal overload release (42), and thermal overload release (42) is electrically connected with second binding post (52); Pedestal (8) is provided with magnetic release lock chamber (81), arc-control device containing cavity (82), thermal overload release lock chamber (83), contact arm container cavity (84) and exhaust passage (85), wherein, magnetic release lock chamber (81) and arc-control device containing cavity (82) are gone up second laminate (802) that extends along the circuit breaker length direction that constitutes by pedestal (8) and are separated, thermal overload release lock chamber (83) and exhaust passage (85) are gone up the three ply board (803) that is the inclined-plane that constitutes by pedestal (8) and are separated, contact arm container cavity (84) is gone up first laminate (801) and the binding post dividing plate (804) that extend along the circuit breaker short transverse that constitute by pedestal (8) and is formed every establishing, first laminate (801), second laminate (802) and three ply board (803) are connected successively, one end of arc-control device grid spacer (805) and first laminate (801), second laminate (802) and three ply board (803) are connected, the other end of arc-control device grid spacer (805) is connected with binding post dividing plate (804), by arc-control device grid spacer (805) with arc-control device containing cavity (82), contact arm container cavity (84) and exhaust passage (85) are respectively every being set as the first arc-control device containing cavity (821) and the second arc-control device containing cavity (822) that is set up in parallel, the first contact arm container cavity (841) and the second contact arm container cavity (842), first exhaust passage (851) and second exhaust passage (852), first fixed contact (61) and second fixed contact (62) are separately fixed at the two ends of first laminate (801).

3. Modular low-voltage breaker of plastic casing according to claim 2, it is characterized in that: the two ends of described three ply board (803) constitute chamber wall (806) to the extension of base (11) direction respectively, and exhaust passage (85) are positioned between three ply board (803) and the chamber wall (806) and by arc-control device grid spacer (805) exhaust passage (85) are separated into first exhaust passage (851) and second exhaust passage (852).

4. Modular low-voltage breaker of plastic casing according to claim 2, it is characterized in that: a side of magnetic release lock chamber (81) length direction on described pedestal (8) is provided with a wall body (811), described wall body (811) all is connected with first laminate (801) and second laminate (802), and constitute grab (8111) and limiting stand (8112) on the wall body (811), by this grab (8111) and limiting stand (8112) magnetic release (41) is fixed in the magnetic release lock chamber (81) of pedestal (8).

5. Modular low-voltage breaker of plastic casing according to claim 2, it is characterized in that: offer first notch (8011) and second notch (8012) on described first laminate (801), first fixed contact (61) engages with first notch (8011), and second fixed contact (62) engages with second notch (8012).

6. Modular low-voltage breaker of plastic casing according to claim 2, it is characterized in that: described binding post dividing plate (804) is connected with first laminate (801) by connecting dividing plate (8041), thus the connecting portion (511) that envelope first binding post (51) is connected with first fixed contact (61).

7. Modular low-voltage breaker of plastic casing according to claim 2, it is characterized in that: described three ply board (803) is extended with the second binding post fixed head (8031), fixes by screw with the second binding post fixed head (8031) after second binding post (52) bending.

8. Modular low-voltage breaker of plastic casing according to claim 2, it is characterized in that: described first arc-control device (71) comprises first arc-chute (711), be connected with first fixed contact (61) first on run-on tab (712), first time run-on tab (713), place near the first U-shaped assembly (714) of first arc-chute (711), this first time run-on tab (713) comprises the first end (7131) that places first arc-chute (711) below, from the first thin foot (7132) that first end (7131) extends, this first U-shaped assembly (714) is installed on the first U-shaped working of plastics (7141) in the first thin foot (7132) by one and is installed on first magnet plate (7142) formation of first U-shaped working of plastics (7141) both sides; Second arc-control device (72) comprises second arc-chute (721), be connected with second fixed contact (62) second on run-on tab (722), second time run-on tab (723), place near the second U-shaped assembly (724) of second arc-chute (721), this second time run-on tab (723) comprises the second end (7231) that places second arc-chute (721) below, from the second thin foot (7232) that the second end (7231) extends, this second U-shaped assembly (724) is installed on the second U-shaped working of plastics (7241) in the second thin foot (7232) by one and is installed on second magnet plate (7242) formation of second U-shaped working of plastics (7241) both sides, the first thin foot (7132) is connected by connecting portion (703) with the second thin foot (7232), the lower position of the both sides of arc-control device grid spacer (805) and corresponding magnetic release lock chamber (8) constitutes card base on (8051) in the position near first laminate (801), position at the close base (11) away from first laminate (801) constitutes card base (8052), the end of the close binding post dividing plate (804) of arc-control device grid spacer (805) offers bayonet socket (8053), last card base (8051) be used for first on the run-on tab (712) and second run-on tab (722) engage, following card base (8052) is used for engaging with first end (7131) and the second end (7231), and bayonet socket (8053) engages with the middle part of connecting portion (703)