CN201838528U - Minitype circuit breaker - Google Patents

Minitype circuit breaker Download PDF

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Publication number
CN201838528U
CN201838528U CN2010205322390U CN201020532239U CN201838528U CN 201838528 U CN201838528 U CN 201838528U CN 2010205322390 U CN2010205322390 U CN 2010205322390U CN 201020532239 U CN201020532239 U CN 201020532239U CN 201838528 U CN201838528 U CN 201838528U
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CN
China
Prior art keywords
circuit breaker
tripping
lever
plate
snap close
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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.)
Expired - Fee Related
Application number
CN2010205322390U
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Chinese (zh)
Inventor
方华朋
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方华朋
Priority date (The priority date 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 date listed.)
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Priority to CN2010205322390U priority Critical patent/CN201838528U/en
Application granted granted Critical
Publication of CN201838528U publication Critical patent/CN201838528U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a minitype circuit breaker mainly solving the problem of strong tripping force between a tripper and a lock catch of the existing minitype circuit breaker. The minitype circuit breaker is characterized in that a lever (14) is arranged between the lock catch (8) and the tripper (9), and the long arm end of the lever (14) is clamped with the lock catch (8). As for the minitype circuit breaker, a space for installing an electromagnetic type zero sequence current mutual inductor is arranged in a shell, and the electromagnetic type zero sequence current mutual inductor with better performance is adopted; and a channel structure of a moving contact and the middle shell is changed. Under the condition of not changing the outline structure and size of the shell of the original minitype circuit breaker, the sensitivity of tripping in leakage is improved, and the minitype circuit breaker has the characteristics of compact structure, weak tripping force and sensitive tripping in leakage, and the product can play a protective role without needing a circuit to provide additional voltage to be taken as a power supply of the product during working.

Description

A kind of miniature circuit breaker
Technical field
The utility model relates to a kind of circuit breaker, belongs to a kind of miniature circuit breaker.
Background technology
Miniature circuit breaker is meant and exchanges the low-voltage circuit breaker that uses on 50/60Hz rated voltage 230/400V, the following circuit of rated current 32A, is usually used in places such as industry, commerce, high level and residential houses.In order to satisfy user's demand; miniature circuit breaker all has overload usually; short circuit and creepage protection function; the main housing of forming by three splits; transmission mechanism; arc control device; short circuit dropout driver; the overlond trip driver; electric leakage dropout driver; moving contact; fixed contact and binding post are formed; transmission mechanism is installed on; in the chamber between the lower house; its inner below by middle casing with 2 polar circuits separately; transmission mechanism is mainly by snap close; tripping; support; moving contact frame; " U " type connecting rod and handle are formed; support; " U " type connecting rod and handle are formed four-bar mechanism; have " V " type groove on the support; one end of " U " type connecting rod places in " V " type groove and can slide therein; tripping is a dihedral; an end of tripping blocks mutually with snap close during normal the use; the other end blocks " V " type groove on the support, and tripping and snap close all are hinged on by axle; between the lower house.Short circuit dropout driver and electric leakage dropout driver sleeve are fitted together, a shared iron core, when electric leakage or short circuit, short circuit dropout driver or electric leakage dropout driver make the iron core action, promote snap close, and snap close and tripping are broken away from, the tripping rotation, " V " type groove on the support is opened, and " U " type connecting rod slides along " V " type groove can't block support, and support drives moving contact under the effect of spring force and fixed contact breaks away from.The overlond trip driver adopts bimetal leaf to drive the snap close action, and during overload, the bimetal leaf temperature distortion makes the snap close action and breaks away from tripping, forms and threads off.There is following defective in use in this miniature circuit breaker: 1, because tripping is very big to the pressure of snap close, between tripping and the snap close friction bigger, when threading off, need enough thrust (tripping force) just can make snap close and tripping disengagement; When short circuit, the electric current in the short-circuited coil is bigger, and the magnetic force of generation can satisfy the dropout condition of tripping, but when electric leakage, the electric current in the electric leakage coil is less, and the magnetic force of generation can not satisfy the dropout condition of tripping, the sensitivity that electric leakage is threaded off is low, the phenomenon that easily causes electric leakage not thread off; During overload, the tension force after the bimetal leaf temperature distortion need be enough to overcome between tripping and the snap close friction just can make snap close action, be prone to the overload phenomenon of not threading off.2, electric leakage dropout driver is by the zero sequence current mutual inductor detection signal, control its action by control circuit again, because the space in the miniature circuit breaker housing is limited, the zero sequence current mutual inductor that uses generally adopts electronic mutual inductor at present, this instrument transformer must provide voltage ability operate as normal by circuit when work, have potential safety hazard.3, between moving contact and the middle casing space is arranged, when the moment of moving contact and fixed contact disjunction, electric arc can enter into the chamber at moving contact rack place, the overlong time that electric arc is stagnated along this space on moving contact, easy burn-out moving contact, short circuit breaking capacity are not high.
The utility model content
In order to overcome disadvantages of background technology, the utility model provides a kind of miniature circuit breaker, mainly solved the bigger problem of tripping force between the tripping and snap close in the existing miniature circuit breaker, in housing, lay out simultaneously the space that the electromagnetic type zero sequence current mutual inductor is installed, adopt the electromagnetic type zero sequence current mutual inductor of better performances; Changed the channel design of moving contact and middle casing.Under the situation of housing contour structures that does not change original miniature circuit breaker and size, improved the sensitivity that electric leakage is threaded off.Have compact conformation, tripping force is little and when electric leakage dropout sensitive characteristics, product need not circuit at work the extra voltage power supply as product is provided, and just can play a protective role when leaking electricity.
The technical solution of the utility model is: a kind of miniature circuit breaker, comprise base, middle plate, cover plate, arc control device, bimetal leaf, transmission mechanism, zero sequence current mutual inductor and dropout driver, transmission mechanism wherein mainly is made up of snap close, tripping, support, moving contact frame, " U " type connecting rod and handle, be provided with lever between described snap close and the tripping, the long arm end of described lever blocks mutually with snap close, and the galianconism end of lever blocks mutually with tripping.
Be provided with bracing frame in the described base, snap close, tripping and lever are hinged by bearing pin mode and bracing frame respectively.
The side of described snap close is provided with a fin, and lever blocks mutually with fin.
The gyroaxis upper section of described snap close is corresponding to bimetal leaf one lateral bending Qu Bingyu bimetal leaf.
Described tripping is provided with the tripping spring, and an end of described tripping spring is stuck on the tripping body, and the other end hangs on the lever.
Described moving contact frame is provided with catch, and middle plate is provided with the chute that matches with catch, and the side of chute is provided with dividing plate and opening, and catch can slide along chute also can open or block described opening.
Described zero sequence current mutual inductor is the electromagnetic type zero sequence current mutual inductor, and described middle plate is made up of big-and-middle plate and little middle two splits of plate, and described zero sequence current mutual inductor places between big-and-middle plate and the little plate.
Described big-and-middle plate is provided with a groove, and arc control device place in the groove.
Be inlaid with the lug plate that is electrically connected with bimetal leaf in the described little middle plate, lug plate is provided with adjustment screw.
The utlity model has following beneficial effect: owing to take such scheme, when short circuit or electric leakage, the action of dropout driver, iron core promotes snap close, and snap close and lever are thrown off, and lever can rotate freely, and the tripping action realizes threading off.Because snap action is on the long arm of force of lever, tripping acts on the short arm of force of lever, therefore producing at dropout driver upper core just to make tripping realize threading off under the very little thrust, solve the bigger problem of tripping force between the tripping and snap close in the existing miniature circuit breaker, improved the sensitivity that electric leakage is threaded off.The utlity model has compact conformation, tripping force is little and when electric leakage dropout sensitive characteristics, product need not circuit at work the extra voltage power supply as product is provided, and just can play a protective role when leaking electricity.
Description of drawings
Accompanying drawing 1 is a structure cutaway view of the present utility model.
Accompanying drawing 2 is component distribution figure of the present utility model.
Accompanying drawing 3 is overall appearance figure of the present utility model.
Accompanying drawing 4 is A place enlarged drawings among Fig. 1.
1-base among the figure, plate among the 2-, 3-cover plate, 4-arc control device, 5-bimetal leaf, the 6-zero sequence current mutual inductor, 7-dropout driver, 8-snap close, 9-tripping, 10-support, the 11-moving contact frame, 12-" U " type connecting rod, 13-handle, 14-lever, the 15-bracing frame, 16-fin, 17-tripping spring, 18-catch, the 19-chute, 20-dividing plate, 21-opening, the big-and-middle plate of 22-, plate during 23-is little, 24-groove, 25-lug plate, 26-adjustment screw.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
By Fig. 1-shown in Figure 4, a kind of miniature circuit breaker, comprise base 1, middle plate 2, cover plate 3, arc control device 4, bimetal leaf 5, transmission mechanism, zero sequence current mutual inductor 6 and dropout driver 7, transmission mechanism wherein mainly is made up of snap close 8, tripping 9, support 10, moving contact frame 11, " U " type connecting rod 12 and handle 13, be provided with lever 14 between described snap close 8 and the tripping 9, the long arm end of described lever 14 blocks mutually with snap close 8, and the galianconism end of lever 14 blocks mutually with tripping 9.When short circuit or electric leakage, 7 actions of dropout driver, iron core promotes snap close 8, and snap close 8 is thrown off with lever 14, and lever 14 can rotate freely, and tripping 9 actions realize threading off.Because snap close 8 acts on the long arm of force of lever 14, tripping 9 acts on the short arm of force of lever 14, therefore producing at dropout driver 7 upper cores just to make tripping 9 realize threading off under the very little thrust, solve the bigger problem of tripping force between the tripping 9 and snap close 8 in the existing miniature circuit breaker, improved the sensitivity that electric leakage is threaded off.The utlity model has compact conformation, tripping force is little and when electric leakage dropout sensitive characteristics, product need not circuit at work the extra voltage power supply as product is provided, and just can play a protective role when leaking electricity.
By shown in Figure 1, be provided with bracing frame 15 in the described base 1, snap close 8, tripping 9 and lever 14 are hinged by bearing pin mode and bracing frame 15 respectively.Present embodiment has only embodied 14 1 kinds of mounting meanss of lever, also can not adopt bracing frame 15, and snap close 8, tripping 9 and lever 14 are hinged between base 1 and the cover plate 3 by the bearing pin mode respectively.
In conjunction with shown in Figure 2, the side of described snap close 8 is provided with a fin 16 by Fig. 1, and lever 14 blocks mutually with fin 16.Fin 16 tops are provided with bending, and bending is blocked mutually with lever 14.During snap close 8 actions, lever 14 breaks away from fin 16, and lever 14 freely rotates.
In conjunction with shown in Figure 2, the gyroaxis upper section of described snap close 8 is corresponding to bimetal leaf 5 one lateral bending Qu Bingyu bimetal leafs 5 by Fig. 1.When overload, bimetal leaf 5 bendings promote snap close 8 and clockwise rotate, and snap close 8 breaks away from lever 14, and tripping 9 is threaded off.
In conjunction with shown in Figure 2, described tripping 9 is provided with tripping spring 17 by Fig. 1, and an end of described tripping spring 17 is stuck on tripping 9 bodies, and the other end hangs on the lever 14.After snap close 8 and lever 14 were thrown off, tripping spring 17 rotated counterclockwise lever 14, and tripping 9 is threaded off.
By Fig. 1 in conjunction with shown in Figure 4, described moving contact frame 11 is provided with catch 18, middle plate 2 is provided with the chute 19 that matches with catch 18, and the side of chute 19 is provided with dividing plate 20 and opening 21, and catch 18 can slide along chute 19 also can open or block described opening 21.When moving contact engaged with fixed contact, catch 18 blocked opening 21, when moving contact and fixed contact disconnection, produce the chamber that electric arc can not enter moving contact frame 11 places, when opening when surpassing 2/3, opening 21 is opened gradually, form inner cycle channel, this moment, electric arc entered in the arc control device 4.Electric arc also was trapped on the moving contact for a long time by the chamber that opening 21 enters moving contact frame 11 places when this structure had avoided moving contact and fixed contact just to disconnect, and prevented to burn moving contact, had improved short circuit breaking capacity.
In conjunction with shown in Figure 2, described zero sequence current mutual inductor 6 is the electromagnetic type zero sequence current mutual inductor by Fig. 1, and described middle plate 2 is made up of big-and-middle plate 22 and little middle 23 two splits of plate, and described zero sequence current mutual inductor 6 places between big-and-middle plate 22 and the little plate 23.Zero sequence current mutual inductor 6 adopts the electromagnetic type zero sequence current mutual inductor of better performances, has improved the sensitivity that electric leakage is threaded off, and has changed the installation site of zero sequence current mutual inductor 6, and structure is compact and reasonable more.
In conjunction with shown in Figure 2, described big-and-middle plate 22 is provided with a groove 24 by Fig. 1, and arc control device 4 place in the groove 24.Arc control device 4 have increased the space of arc control device 4 between base 1 and cover plate 3, arc quenching effect is good.
In conjunction with shown in Figure 2, be inlaid with the lug plate 25 that with bimetal leaf 5 be electrically connected in the described little middle plate 23 by Fig. 1, lug plate 25 is provided with adjustment screw 26.Lug plate 25 in the bimetal leaf 5 direct and little middle plates 23 links to each other, and occupies little space compact conformation.The nut of adjustment screw 26 be embedded in little in the plate 23, little in plate 23 be provided with the through hole corresponding with adjustment screw 26, can adjust the position of bimetal leaf 5 by adjustment screw 26, be convenient to regulate.

Claims (9)

1. miniature circuit breaker, comprise base (1), middle plate (2), cover plate (3), arc control device (4), bimetal leaf (5), transmission mechanism, zero sequence current mutual inductor (6) and dropout driver (7), transmission mechanism wherein mainly is made up of snap close (8), tripping (9), support (10), moving contact frame (11), " U " type connecting rod (12) and handle (13), it is characterized in that: be provided with lever (14) between described snap close (8) and the tripping (9), the long arm end of described lever (14) blocks mutually with snap close (8), and the galianconism end of lever (14) blocks mutually with tripping (9).
2. a kind of miniature circuit breaker according to claim 1 is characterized in that: be provided with bracing frame (15) in the described base (1), snap close (8), tripping (9) and lever (14) are hinged by bearing pin mode and bracing frame (15) respectively.
3. a kind of miniature circuit breaker according to claim 1 and 2 is characterized in that: the side of snap close (8) is provided with a fin (16), and lever (14) blocks mutually with fin (14).
4. a kind of miniature circuit breaker according to claim 1 and 2 is characterized in that: the gyroaxis upper section of snap close (8) is corresponding to bimetal leaf (5) one lateral bending Qu Bingyu bimetal leafs (5).
5. a kind of miniature circuit breaker according to claim 1 and 2 is characterized in that: tripping (9) is provided with tripping spring (17), and an end of described tripping spring (17) is stuck on tripping (9) body, and the other end hangs on the lever (14).
6. a kind of miniature circuit breaker according to claim 1 and 2, it is characterized in that: moving contact frame (11) is provided with catch (18), middle plate (2) is provided with the chute (19) that matches with catch (18), the side of chute (19) is provided with dividing plate (20) and opening (21), and catch (18) can slide along chute (19) also can open or block described opening (21).
7. a kind of miniature circuit breaker according to claim 1 and 2, it is characterized in that: described zero sequence current mutual inductor (6) is the electromagnetic type zero sequence current mutual inductor, plate (2) is made up of big-and-middle plate (22) and little middle (23) two splits of plate in described, and described zero sequence current mutual inductor (6) places between big-and-middle plate (22) and the little plate (23).
8. a kind of miniature circuit breaker according to claim 7 is characterized in that: described big-and-middle plate (22) is provided with a groove (24), and arc control device (4) place in the groove (24).
9. a kind of miniature circuit breaker according to claim 7 is characterized in that: be inlaid with the lug plate (25) that is electrically connected with bimetal leaf (5) in the plate (23) in little, lug plate (25) is provided with adjustment screw (26).
CN2010205322390U 2010-09-16 2010-09-16 Minitype circuit breaker Expired - Fee Related CN201838528U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205322390U CN201838528U (en) 2010-09-16 2010-09-16 Minitype circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205322390U CN201838528U (en) 2010-09-16 2010-09-16 Minitype circuit breaker

Publications (1)

Publication Number Publication Date
CN201838528U true CN201838528U (en) 2011-05-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010205322390U Expired - Fee Related CN201838528U (en) 2010-09-16 2010-09-16 Minitype circuit breaker

Country Status (1)

Country Link
CN (1) CN201838528U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101930883A (en) * 2010-09-16 2010-12-29 方华朋 Small-sized breaker
WO2012045209A1 (en) * 2010-10-09 2012-04-12 Fang Huapeng Miniature breaker
CN104377092A (en) * 2014-09-29 2015-02-25 江苏普华力拓电器股份有限公司 Miniature circuit breaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101930883A (en) * 2010-09-16 2010-12-29 方华朋 Small-sized breaker
CN101930883B (en) * 2010-09-16 2012-06-20 方华朋 Small-sized breaker
WO2012045209A1 (en) * 2010-10-09 2012-04-12 Fang Huapeng Miniature breaker
CN104377092A (en) * 2014-09-29 2015-02-25 江苏普华力拓电器股份有限公司 Miniature circuit breaker

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110518

Termination date: 20150916

EXPY Termination of patent right or utility model