CN101645379B - Small circuit breaker with protection of electric leakage, overload and short circuit - Google Patents
Small circuit breaker with protection of electric leakage, overload and short circuit Download PDFInfo
- Publication number
- CN101645379B CN101645379B CN2009101023160A CN200910102316A CN101645379B CN 101645379 B CN101645379 B CN 101645379B CN 2009101023160 A CN2009101023160 A CN 2009101023160A CN 200910102316 A CN200910102316 A CN 200910102316A CN 101645379 B CN101645379 B CN 101645379B
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- electric leakage
- circuit breaker
- bobbin
- tripping
- overload
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- 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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2481—Electromagnetic mechanisms characterised by the coil design
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
The invention relates to a small circuit breaker with protection of electric leakage, overload and short circuit. The small circuit breaker mainly solves the problem that the existing double-wire small circuit breaker has poor tripping flexibility when in electric leakage and is characterized in that the coil frame (14) is arranged on the position of a lower shell (3) corresponding to a trip (9); a locking fastener (8) is provided with a baffle plate (20) corresponding to an inner top needle (18) of the coil frame (14); and a rotating shaft (28) of the trip (9) is arranged between the coil frame (14) and an upper shell (1). The small circuit breaker with protection of electric leakage, overload and short circuit improves the sensitivity of leakage tripping under the condition without changing the appearance structure and size of the shell of the original small circuit breaker. In addition, the small circuit breaker changes the shape of an arc extinguish chamber, improves arc extinguish performance, further improves breaking capability of the circuit breaker, and is characterized by compact structure, high sensitivity of leakage tripping and high breaking capability.
Description
Technical field:
The present invention relates to a kind of circuit breaker, belong to a kind of miniature circuit breaker with electric leakage, overload, short-circuit protection.
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 63A, is usually used in places such as industry, commerce, high level and residential houses.Owing to miniature circuit breaker commonly used has overload and short-circuit protection function not to have creepage protection function; thereby Chinese patent ZL99206121.0 discloses the two-wire circuit breaker that a kind of width is 18mm; this patent has been added an electric leakage dropout driver in housing; the one side lengthening of housing; enlarged shell space; lay the coil of electric leakage dropout driver then; though on function, increased creepage protection function; but because structure is not compact; the volume and the profile of housing are bigger; when being used with other miniature circuit device, seem irregular, be not easy to distribution and install.The two-wire circuit breaker that it is 18mm that Chinese patent ZL200420081810.6 discloses a kind of improved width, with ZL99206121.0 technology as a setting, 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.When electric leakage, overload or short circuit, tripping and snap close break away from, the tripping rotation, and " 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 potential winding sleeve of electric leakage dropout driver is in the current coil of short circuit dropout driver, described potential winding and current coil also are connected in the circuit of electric leakage dropout driver, electric leakage dropout driver and the shared iron core of short circuit dropout driver, iron core place in the potential winding of electric leakage dropout driver.When electric leakage or short circuit, electric current is arranged by making the iron core action in potential winding or the current coil, touching snap close and tripping to the greatest extent breaks away from, the tripping rotation, " V " type groove on the support is opened, " 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.Because electric leakage dropout driver is different with the electric current of short circuit dropout driver, the electric current that the potential winding in the dropout driver that wherein leaks electricity passes through is generally less, and the elastic force of the spring that iron core need reset is also less; And the electric current that the current coil in the short circuit dropout driver passes through is bigger, and the elastic force of the spring that iron core need reset is also bigger, if the elastic force of spring is less, small electric stream is arranged by threading off in the current coil, can not normally use.Therefore leak electricity dropout driver and the shared iron core of short circuit dropout driver will produce contradiction, in order to solve this contradiction, in the ZL200420081810.6 patent, selected the spring of big elastic force for use, the potential winding that will leak electricity then in the dropout driver is connected on the current amplification circuit, on potential winding, obtain bigger electric current, because electric leakage dropout driver and shared iron core of short circuit dropout driver and spring, the elastic force of spring is bigger, the electric current amplification multiple is bigger when electric leakage occurring, cause the magnetic force that produces on the leakage current hour potential winding to be not enough to overcome the elastic force of spring and thread off, sensitivity is relatively poor, the phenomenon of not threading off of leaking electricity usually occurs; In addition, the short circuit dropout repeatedly makes the heat of iron core instantaneous operation generation that electric leakage coil and circuit board are burnt out.
More than the arc control device that use on the miniature circuit breaker of 2 kinds and existing other kind be structure commonly used, link together after mainly a plurality of shapes, arc extinguishing grid pieces that size is identical equidistantly being arranged and form by insulated connecting piece, wherein short near the arc extinguishing grid pieces of moving contact, far away apart from moving contact and fixed contact, electric arc enters the arc control device difficulty, make that the utilance of arc extinguishing grid pieces is low, arc quenching effect is poor, directly influences the breaking capacity of circuit breaker.
Summary of the invention:
In order to overcome disadvantages of background technology, the invention provides a kind of miniature circuit breaker with electric leakage, overload, short-circuit protection, the problem of dropout poor sensitivity when mainly having solved the electric leakage of existing two-wire miniature circuit breaker, 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; In addition, change the shape of arc control device, improved arc extinction performance, improved to the greatest extent the breaking capacity of circuit breaker, had compact conformation, the electric leakage characteristics highly sensitive and that breaking capacity is high of threading off.
Technical scheme of the present invention is: a kind of band electric leakage; overload; the miniature circuit breaker of short-circuit protection; comprise; in; lower house; arc control device; transmission mechanism; short circuit dropout driver; overlond trip driver and electric leakage dropout driver; transmission mechanism is mainly by snap close; tripping; support; moving contact frame; " U " type connecting rod and handle are formed; electric leakage dropout driver is by bobbin; potential winding; iron core; spring and thimble are formed; described potential winding is connected in the loop of zero sequence current mutual inductor and arithmetic and control unit composition; described bobbin is installed in the position of corresponding tripping on the lower house; snap close be provided with bobbin in the corresponding catch of thimble, the gyroaxis of tripping is installed between bobbin and the upper shell.
Have draw-in groove and locating piece on the described lower house, have on the bobbin and described draw-in groove and corresponding clamp of locating piece and location notch, bobbin is embedded on the lower house.
The arc extinguishing grid pieces of described arc control device entrance point adds and grows to the corresponding position of moving contact.
The present invention has following beneficial effect: owing to take such scheme; electric leakage dropout driver has been taked absolute construction; ZL200420081810.6 compares with Chinese patent; the present invention is not subjected to the restriction of short circuit dropout driver in use; wherein can select for use the less spring of elastic force to cooperate installation with iron core in the potential winding; make the present invention have electric leakage simultaneously; the function of overload and short-circuit protection; because the elastic force of spring is less; potential winding produces the elastic force that less magnetic force just can overcome spring iron core is moved during electric leakage; and then the shake-up snap close makes its action; can reduce current amplification factor; improved the sensitivity that electric leakage is threaded off; leak electricity tripping coil and circuit board burnout phenomenon can not appear, and safe and reliable.The present invention compares with Chinese patent ZL99206121.0; dexterously bobbin is arranged on the respective side of tripping; made full use of the space in the housing; under the situation of contour structures that does not change housing and size; realized the function of electric leakage, overload and short-circuit protection, compact conformation, profile is neat when being used with other miniature circuit breaker; the use of can arranging in pairs or groups is convenient to distribution and is installed.
Description of drawings:
Accompanying drawing 1 is a structure cutaway view of the present invention;
Accompanying drawing 2 is mounting structure figure of the present invention;
Accompanying drawing 3 is A-A structure cutaway views among Fig. 2;
Accompanying drawing 4 is structural representations of lower house 3 among Fig. 1;
Accompanying drawing 5 is structural representations of snap close 8 among Fig. 1;
Accompanying drawing 6 is structural representations of bobbin 14 among Fig. 1;
Accompanying drawing 7 is vertical views of Fig. 1.
1-upper shell among the figure, 2-middle shell, 3-lower house, 4-arc control device, 5-short circuit dropout driver, 6-overlond trip driver, 7-electric leakage dropout driver, 8-snap close, 9-tripping, 10-support, the 11-moving contact frame, 12-" U " type connecting rod, 13-handle, 14-bobbin, 15-potential winding, the 16-iron core, 17-spring, 18-thimble, 19-zero sequence current mutual inductor, 20-catch, the 21-draw-in groove, 22-locating piece, 23-clamp, 24-location notch, the 25-arc extinguishing grid pieces, 26-yoke, 27-striking sheet, 28-gyroaxis.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing:
By Fig. 1-shown in Figure 7; a kind of band electric leakage; overload; the miniature circuit breaker of short-circuit protection; comprise; in; lower house (1; 2; 3); arc control device 4; transmission mechanism; short circuit dropout driver 5; overlond trip driver 6 and electric leakage dropout driver 7; transmission mechanism is mainly by snap close 8; tripping 9; support 10; moving contact frame 11; " U " type connecting rod 12 and handle 13 are formed; electric leakage dropout driver 7 is by bobbin 14; potential winding 15; iron core 16; spring 17 and thimble 18 are formed; described potential winding 15 is connected in the loop of zero sequence current mutual inductor 19 and arithmetic and control unit composition; described bobbin 14 is installed in the position of corresponding tripping 9 on the lower house 3; snap close 8 is provided with and bobbin 14 interior thimble 18 corresponding catch 20; the gyroaxis 28 of tripping 9 is installed between bobbin 14 and the upper shell 1; have on the bobbin 14 with upper shell 3 on corresponding blind hole; this blind hole is the installing hole of the gyroaxis 28 of tripping 9, and the gyroaxis 28 of tripping 9 is inserted in this blind hole.Above-mentioned short circuit dropout driver 5, overlond trip driver 6 and electric leakage dropout driver 7 are prior art, and concrete structure and annexation repeat no more herein.In such scheme; electric leakage dropout driver 7 has been taked absolute construction; ZL200420081810.6 compares with Chinese patent; the present invention is not subjected to the restriction of short circuit dropout driver 5 in use; wherein can select for use elastic force less spring 17 to cooperate installation in the potential winding 15 with iron core 18; make the present invention have electric leakage simultaneously; the function of overload and short-circuit protection; because the elastic force of spring 17 is less; potential winding 15 produces the elastic force that less magnetic force just can overcome spring iron core 18 is moved during electric leakage; and then touch snap close 8 and make its action; realize threading off; main contact separates, and can reduce current amplification factor, has improved the sensitivity that electric leakage is threaded off; leak electricity tripping coil and circuit board burnout phenomenon can not appear, and safe and reliable.The present invention compares with Chinese patent ZL99206121.0; dexterously bobbin 14 is arranged on the respective side of tripping 9; made full use of the space in the housing; under the situation of contour structures that does not change housing and size; realized the function of electric leakage, overload and short-circuit protection, compact conformation, profile is neat when being used with other miniature circuit breaker; the use of can arranging in pairs or groups is convenient to distribution and is installed.
In conjunction with Fig. 2, shown in Figure 3, have draw-in groove 21 and locating piece 22 by Fig. 1 on the described lower house 3, have on the bobbin 14 and described draw-in groove 21 and locating piece 22 corresponding clamp 23 and location notchs 24, bobbin 14 is embedded on the lower house 3.22 pairs of bobbins of draw-in groove 21 and locating piece 14 carry out spacing, and the gyroaxis 28 of the tripping 9 of installing on the bobbin 14 has also played fixing and spacing effect to it simultaneously.
In conjunction with Fig. 2, the arc extinguishing grid pieces 25 of described arc control device 4 entrance points adds and grows to the corresponding position of moving contact by Fig. 1.Make the moving contact end points differ less to the distance of each arc extinguishing grid pieces 25, electric arc slips in the arc control device 4 along the termination of each arc extinguishing grid pieces 25, can cover arc control device 4 fully, the utilance height of arc extinguishing grid pieces 25, electric arc is cut off after entering arc control device 4 very soon, arc quenching effect is good, has improved the breaking capacity of circuit breaker.
Claims (3)
1. band electric leakage; overload; the miniature circuit breaker of short-circuit protection; comprise; in; lower house (1; 2; 3); arc control device (4); transmission mechanism; short circuit dropout driver (5); overlond trip driver (6) and electric leakage dropout driver (7); transmission mechanism is mainly by snap close (8); tripping (9); support (10); moving contact frame (11); " U " type connecting rod (12) and handle (13) are formed; electric leakage dropout driver (7) is by bobbin (14); potential winding (15); iron core (16); spring (17) and thimble (18) are formed; described potential winding (15) is connected in the loop of zero sequence current mutual inductor (19) and arithmetic and control unit composition; it is characterized in that: described bobbin (14) is installed in the position that lower house (3) is gone up corresponding tripping (9); snap close (8) is provided with and the corresponding catch of the interior thimble of bobbin (14) (18) (20), and the gyroaxis (28) of tripping (9) is installed between bobbin (14) and the upper shell (1).
2. a kind of miniature circuit breaker according to claim 1 with electric leakage, overload, short-circuit protection; it is characterized in that: have draw-in groove (21) and locating piece (22) on the lower house (3); have on the bobbin (14) and described draw-in groove (21) and corresponding clamp of locating piece (22) (23) and location notch (24), bobbin (14) is embedded on the lower house (3).
3. a kind of miniature circuit breaker with electric leakage, overload, short-circuit protection according to claim 1 and 2 is characterized in that: the arc extinguishing grid pieces (25) of arc control device (4) entrance point adds and grows to the corresponding position of moving contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101023160A CN101645379B (en) | 2009-09-01 | 2009-09-01 | Small circuit breaker with protection of electric leakage, overload and short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101023160A CN101645379B (en) | 2009-09-01 | 2009-09-01 | Small circuit breaker with protection of electric leakage, overload and short circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101645379A CN101645379A (en) | 2010-02-10 |
| CN101645379B true CN101645379B (en) | 2011-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101023160A Expired - Fee Related CN101645379B (en) | 2009-09-01 | 2009-09-01 | Small circuit breaker with protection of electric leakage, overload and short circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101645379B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930883B (en) * | 2010-09-16 | 2012-06-20 | 方华朋 | Small-sized breaker |
| CN102760622B (en) * | 2012-07-23 | 2016-03-16 | 乐清市智顺电气有限公司 | It is 18mm multifunctional electric leakage circuit breaker that nothing lengthens width |
| CN103065896A (en) * | 2012-12-18 | 2013-04-24 | 天津市百利电气有限公司 | Arc-extinction device of low voltage intelligent universal circuit beaker |
| CN203588948U (en) * | 2013-11-26 | 2014-05-07 | 德力西电气有限公司 | Coil framework assembly structure of circuit breaker |
| FR3046289B1 (en) * | 2015-12-29 | 2018-02-16 | Legrand France | PROTECTIVE ELECTRICAL APPARATUS WITH MODULAR FORMAT |
| CN108899259A (en) * | 2018-05-28 | 2018-11-27 | 上海诺雅克电气有限公司 | Earth leakage circuit breaker |
| CN109741999A (en) * | 2019-01-28 | 2019-05-10 | 浙江思创电力科技股份有限公司 | A kind of breaker |
| CN114582683B (en) * | 2022-03-10 | 2023-05-23 | 中群电气有限公司 | Intelligent miniature circuit breaker |
| CN116705567B (en) * | 2023-08-07 | 2023-10-24 | 森萨塔科技（常州）有限公司 | Leakage protection device and electrical equipment |
-
2009
- 2009-09-01 CN CN2009101023160A patent/CN101645379B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101645379A (en) | 2010-02-10 |
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Granted publication date: 20110608 Termination date: 20210901 |
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