CN101930883B - Small-sized breaker - Google Patents
Small-sized breaker Download PDFInfo
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- CN101930883B CN101930883B CN2010102841821A CN201010284182A CN101930883B CN 101930883 B CN101930883 B CN 101930883B CN 2010102841821 A CN2010102841821 A CN 2010102841821A CN 201010284182 A CN201010284182 A CN 201010284182A CN 101930883 B CN101930883 B CN 101930883B
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- tripping
- lever
- plate
- snap close
- circuit breaker
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Abstract
The invention discloses a small-sized breaker, which mainly solves the problem of large tripping force between a trip and a latch in the conventional small-sized breaker. The small-sized breaker is characterized in that a lever (14) is arranged between a latch (8) and a trip (9), wherein a long arm end of the lever (14) is clamped with the latch (8), while a short arm end of the lever (14) is clamped with the trip (9). A space for arranging an electromagnetic zero-sequence current transformer is arranged in a shell of the small-sized breaker, and the electromagnetic zero-sequence current transformer with high performance is adopted, so that a channel structure of a movable contact and a middle shell is changed. The breaker improves the flexibility of electric leakage tripping under the condition of not changing the external structure and size of the shell of the conventional small-sized breaker and has the characteristics of compact structure, small tripping force and flexible tripping during electric leakage; and the protection effect can be achieved during the electric leakage and a circuit does not need extra voltage serving as power of the product in the work of the product.
Description
Technical field
The present invention relates to a kind of circuit breaker, belong to a kind of miniature circuit breaker.
Background technology
Miniature circuit breaker is meant and exchanges 50/60Hz rated voltage 230/400V, the low-voltage circuit breaker of rated current 32A to use on the line, 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, short circuit and creepage protection function usually; The housing of mainly being made up of three splits, transmission mechanism, arc control device, short circuit dropout driver, overlond trip driver, electric leakage dropout driver, moving contact, fixed contact and binding post are formed, and transmission mechanism is installed in the chamber between the upper and lower casing, and its inner below by middle casing with 2 polar circuits separately; Transmission mechanism mainly is made up of snap close, tripping, support, moving contact frame, " U " type connecting rod and handle; Support, " U " type connecting rod and handle are formed four-bar mechanism, have " V " type groove on the support, and an end of " U " type connecting rod places in " V " type groove and can slide therein; Tripping is a dihedral; An end of tripping blocks with snap close mutually during normal the use, and the other end blocks " V " type groove on the support, and tripping and snap close all are hinged between the upper and lower casing through axle.Short circuit dropout driver and electric leakage dropout driver sleeve are fitted together, and a shared iron core is 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 under the effect of spring force, drives moving contact 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, is prone to the phenomenon that 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 through the zero sequence current mutual inductor detection signal; Again by its action of control circuit control; Because the space in the miniature circuit breaker housing is limited; The zero sequence current mutual inductor that uses at present generally adopts electronic mutual inductor, and 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.
Summary of the invention
In order to overcome disadvantages of background technology; The present invention 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 when leaking electricity, play a protective role.
Technical scheme of the present invention 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 with snap close mutually, and the galianconism end of lever blocks with tripping mutually.
Be provided with bracing frame in the described base, snap close, tripping and lever are hinged through bearing pin mode and bracing frame respectively.
The side of described snap close is provided with a fin, and lever blocks with fin mutually.
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 present invention 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 present invention has compact conformation, tripping force is little and when electric leakage dropout sensitive characteristics, and product need not circuit at work the extra voltage power supply as product is provided, and just can when leaking electricity, play a protective role.
Description of drawings
Accompanying drawing 1 is a structure cutaway view of the present invention.
Accompanying drawing 2 is component distribution figure of the present invention.
Accompanying drawing 3 is overall appearance figure of the present invention.
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, 6-zero sequence current mutual inductor, 7-dropout driver; The 8-snap close, 9-tripping, 10-support, 11-moving contact frame, 12-" U " type connecting rod, 13-handle, 14-lever; The 15-bracing frame, 16-fin, 17-tripping spring, 18-catch, 19-chute, 20-dividing plate; The 21-opening, the big-and-middle plate of 22-, plate during 23-is little, 24-groove, 25-lug plate, 26-adjustment screw.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further:
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, is provided with lever 14 between described snap close 8 and the tripping 9; The long arm end of described lever 14 blocks with snap close 8 mutually, and the galianconism end of lever 14 blocks with tripping 9 mutually.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 present invention has compact conformation, tripping force is little and when electric leakage dropout sensitive characteristics, and product need not circuit at work the extra voltage power supply as product is provided, and just can when leaking electricity, play a protective role.
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 through 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 through the bearing pin mode respectively.
Combined shown in Figure 2ly by Fig. 1, the side of described snap close 8 is provided with a fin 16, and lever 14 blocks with fin 16 mutually.Fin 16 tops are provided with curved sheet, and curved sheet blocks with lever 14 mutually.During snap close 8 actions, lever 14 breaks away from fin 16, and lever 14 freely rotates.
Combined shown in Figure 2ly by Fig. 1, the gyroaxis upper section of described snap close 8 is corresponding to bimetal leaf 5 one lateral bending Qu Bingyu bimetal leafs 5.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.
Combined shown in Figure 2ly by Fig. 1, described tripping 9 is provided with tripping spring 17, 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.
Combine shown in Figure 4 by Fig. 1; 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 get into moving contact frame 11 places, when opening when surpassing 2/3, opening 21 is opened gradually; Form inner cycle channel, this moment, electric arc got in the arc control device 4.Electric arc also was trapped on the moving contact through the chamber that opening 21 gets into moving contact frame 11 places for a long time when this structure had avoided moving contact and fixed contact just to break off, and prevented to burn moving contact, had improved short circuit breaking capacity.
Combined shown in Figure 2ly by Fig. 1, described zero sequence current mutual inductor 6 is the electromagnetic type zero sequence current mutual inductor, described in plate 2 by big-and-middle plate 22 and little in 23 two splits of plate form, 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.
Combined shown in Figure 2ly by Fig. 1, described big-and-middle plate 22 is provided with a groove 24, 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.
Combined shown in Figure 2ly by Fig. 1, describedly 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.Bimetal leaf 5 directly links to each other with little middle plate 23 interior lug plates 25, 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 through adjustment screw 26, be convenient to adjusting.
Claims (8)
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 with snap close (8) mutually, and the galianconism end of lever (14) blocks with tripping (9) mutually; Moving contact frame (11) is provided with catch (18), and 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); 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 get into moving contact frame (11) place; When opening when surpassing 2/3, opening (21) is opened gradually, forms inner cycle channel.
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 through 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 with fin (14) mutually.
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: 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).
7. a kind of miniature circuit breaker according to claim 6 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).
8. a kind of miniature circuit breaker according to claim 6 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102841821A CN101930883B (en) | 2010-09-16 | 2010-09-16 | Small-sized breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102841821A CN101930883B (en) | 2010-09-16 | 2010-09-16 | Small-sized breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101930883A CN101930883A (en) | 2010-12-29 |
| CN101930883B true CN101930883B (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102841821A Expired - Fee Related CN101930883B (en) | 2010-09-16 | 2010-09-16 | Small-sized breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101930883B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012045209A1 (en) * | 2010-10-09 | 2012-04-12 | Fang Huapeng | Miniature breaker |
| CN102184813A (en) * | 2011-04-22 | 2011-09-14 | 温州奥来电器有限公司 | Double-arcing-shield circuit breaker |
| CN102568948B (en) * | 2011-12-13 | 2014-06-18 | 科都电气有限公司 | Improved circuit breaker |
| CN105702537B (en) * | 2016-04-14 | 2017-12-01 | 乐清市智顺电气有限公司 | Electric protective device |
| CN108054066B (en) * | 2017-12-15 | 2023-09-12 | 浙江正泰电器股份有限公司 | Cold bending rotating shaft structure of electromagnetic release of circuit breaker |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1094380A (en) * | 1964-06-16 | 1967-12-13 | Square D Co | Electric circuit breaker with thermal tripping means |
| CN2457727Y (en) * | 2000-10-13 | 2001-10-31 | 郑巨华 | High split small braker |
| CN1841616A (en) * | 2005-03-29 | 2006-10-04 | 三菱电机株式会社 | Residual current circuit breaker |
| CN101106046A (en) * | 2007-06-07 | 2008-01-16 | 浙江正泰电器股份有限公司 | An operation machine for small residual current action breaker |
| CN101645379A (en) * | 2009-09-01 | 2010-02-10 | 方华朋 | Small circuit breaker with protection of electric leakage, overload and short circuit |
| CN201838528U (en) * | 2010-09-16 | 2011-05-18 | 方华朋 | Minitype circuit breaker |
-
2010
- 2010-09-16 CN CN2010102841821A patent/CN101930883B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1094380A (en) * | 1964-06-16 | 1967-12-13 | Square D Co | Electric circuit breaker with thermal tripping means |
| CN2457727Y (en) * | 2000-10-13 | 2001-10-31 | 郑巨华 | High split small braker |
| CN1841616A (en) * | 2005-03-29 | 2006-10-04 | 三菱电机株式会社 | Residual current circuit breaker |
| CN101106046A (en) * | 2007-06-07 | 2008-01-16 | 浙江正泰电器股份有限公司 | An operation machine for small residual current action breaker |
| CN101645379A (en) * | 2009-09-01 | 2010-02-10 | 方华朋 | Small circuit breaker with protection of electric leakage, overload and short circuit |
| CN201838528U (en) * | 2010-09-16 | 2011-05-18 | 方华朋 | Minitype circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101930883A (en) | 2010-12-29 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG ULTRA SHENG POWER EQUIPMENT CO., LTD. Free format text: FORMER OWNER: FANG HUAPENG Effective date: 20130329 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 325604 WENZHOU, ZHEJIANG PROVINCE TO: 317300 TAIZHOU, ZHEJIANG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130329 Address after: 317300 Yongan Industrial Zone, Xianju County, Zhejiang, Taizhou Patentee after: Zhejiang super power equipment Co., Ltd. Address before: 325604, No. three, No. 5, Dong Jing Road, Liushi Town, Wenzhou, Zhejiang, Yueqing Patentee before: Fang Huapeng |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20190916 |