CN202651039U - Miniature breaker - Google Patents
Miniature breaker Download PDFInfo
- Publication number
- CN202651039U CN202651039U CN 201220331661 CN201220331661U CN202651039U CN 202651039 U CN202651039 U CN 202651039U CN 201220331661 CN201220331661 CN 201220331661 CN 201220331661 U CN201220331661 U CN 201220331661U CN 202651039 U CN202651039 U CN 202651039U
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- CN
- China
- Prior art keywords
- arc
- circuit breaker
- moving contact
- miniature circuit
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a miniature breaker, comprising a base 9, an insulating housing 10, an arc extinguish chamber 1, a magnet yoke 2, an input terminal 15, an output terminal 16, a static contact 4, a moving contact 5, a trip-free mechanism, an operating mechanism, an arc guiding plate 17, and also comprises an arc striking pin 6. An end of the arc striking pin is disposed on the magnet yoke 2, and the other end extends toward a direction of the moving contact 5. The arc striking pin is used to guide arc generated when the moving contact 5 and the static contact 4 are disconnected into the arc extinguish chamber. Thus, arc striking effect of the miniature breaker is enhanced in a process of disconnection, and reliability of the miniature breaker is improved.
Description
Technical field
The utility model relates to a kind of low-voltage electrical apparatus.Relate to particularly a kind of miniature circuit breaker.
Background technology
Prior art discloses a kind of miniature circuit breaker, comprises contact system, arc quenching system, operating mechanism, free tripping mechanism, over-current protection system and short circuit protection system.The moving contact that operating mechanism is driven in the contact system by operating grip moves, and miniature circuit breaker is connected and disjunction, realizes the control to electric wiring; By the sensing of heating effect of current and magnetic effect, electric wiring is transshipped, implements during the fault such as short circuit protection.
When dynamic/static contact contacted and enough contacts are arranged, miniature circuit breaker was connected electric loop, by the local temperature variation of bimetallic element sensing miniature circuit breaker, judged the size of current of circuit system, realized excess current protective function.When loop current remains on load current value that miniature circuit breaker sets and when following, the distortion that the thermal effect that this electric current produces produces hardware is very little, and tripper is triped; When loop current surpassed the rated current of setting, the hardware temperature of miniature circuit breaker raise, and can produce enough thermal deformations; the promotion free tripping mechanism is triped, and at this moment, the dynamic/static contact in the contact system separately; cut off current circuit, realize current protecting function.
Short circuit protection system is by the variation of solenoid electromagnet sensing loop electric current, when loop current is in normal value or when the short-circuit protection value of setting is following, the electromagnetic attraction that solenoid electromagnet produces can not overcome the active force of reaction spring, and iron core remains on initial position; When current circuit was short-circuited fault, electric current sharply increased, and the electromagnetic force that solenoid electromagnet produces overcomes under the effect of reaction spring to be opened fast, cuts off current circuit, realizes current protecting function.
The effect of free tripping mechanism is when there is the signal of overcurrent fault or other No switching on orders in the loop, even the handle of operation miniature circuit breaker wants to make it to close a floodgate, the moving contact of miniature circuit breaker still remains on open position; When the loop exists overcurrent or short trouble and when sending the disjunction instruction, makes small size breaker, cut off current circuit.
The effect of operating mechanism is the active force by handle, drives the moving contact motion in the contact system, realizes connecting and disjunction; In dynamic/static contact disconnection process, in order to realize metering function, require moving contact that enough opening speeds will be arranged; Enough dielectric strengths are arranged when making the miniature circuit breaker off-state, must make to have enough electric clearances between dynamic/static contact.
The effect of free tripping mechanism is when there is the signal of overcurrent fault or other No switching on orders in the loop, even the handle of operation miniature circuit breaker wants to make it to close a floodgate, the moving contact of miniature circuit breaker still remains on open position; When the loop exists overcurrent or short trouble and when sending the disjunction instruction, makes small size breaker, cut off current circuit.
Arc quenching system comprises leads arc plate, arc control device, effect be when miniature circuit breaker when disconnecting excessive short circuit current, by the effect to electric arc, realize that Limited Current continues the trend that increases, i.e. metering function, and arc extinction the most at last.When electric arc enters arc control device, be separated into many sections by the metal gate sheet in the arc control device, every section electric arc all produces a proximal pole voltage near the metal gate sheet, the pressure drop of whole electric arc is improved rapidly, and electric arc is extinguished rapidly.
Although disclose in the prior art and led electric arc that the arc plate produces moving contact and fixed contact disjunction and introduce arc control device and carry out the design of arc extinguishing, but because the breaking capacity of contact system is poor, the effect of leading the striking of arc plate is not good enough, although insulation crust can provide the basic insulation of miniature circuit breaker, meeting is so that the reliability of miniature circuit breaker is lower.
The utility model content
For this reason, the technical problems to be solved in the utility model is that the reliability of the middle-size and small-size circuit breaker of prior art is not high, thereby proposes a kind of miniature circuit breaker of higher reliability.
A kind of miniature circuit breaker of the present utility model comprises
Base;
Insulation shell covers on the described base;
Described enclosure interior is equipped with:
Arc control device;
Over-current protection system;
Yoke is located on the described over-current protection system;
Input terminal is fixed on the shell;
Lead-out terminal is electrically connected with described over-current protection system;
Fixed contact is fixed on the described insulation crust;
Moving contact is flexibly connected with described fixed contact correspondingly with described insulation crust, and is electrically connected with described input terminal;
Free tripping mechanism is connected with described moving contact, is subjected to the control of over-current protection system to control the disjunction of described moving contact and described fixed contact;
Operating mechanism is located on the described insulation crust, is connected with described free tripping mechanism, is used for controlling described free tripping mechanism disjunction;
Lead the arc plate, an end is located at described arc control device place, and the other end is located at described fixed contact place;
Also comprise the striking pin, described striking pin one end is located on the described yoke, and the other end extends to described moving contact direction, and the electric arc that produces when being used for described moving contact and described fixed contact disjunction is introduced arc control device.
Above-mentioned miniature circuit breaker also comprises link stopper, and described block is located in the described insulation crust, and described striking pin leans on mutually with described block sidewall.
Above-mentioned miniature circuit breaker, described striking pin become 135 degree with the angle of described yoke.
Above-mentioned miniature circuit breaker, described free tripping mechanism comprise tripping and with taking off that described tripping matches
Button.
The connecting rod that above-mentioned miniature circuit breaker, described operating mechanism comprise handle, are hinged with handle.
Technique scheme of the present utility model has the following advantages compared to existing technology:
The miniature circuit breaker that the utility model relates to, increased the design of striking pin, and described striking pin one end is located on the described yoke, the other end extends to described moving contact, the electric arc that produces when being used for described moving contact and described fixed contact disjunction is introduced arc control device, thereby has strengthened the effect of small-sized short-circuiting device striking in breaking course, makes miniature circuit breaker in use not be subjected to arc damage, guarantee the reliability of performance, prolonged useful life.
Description of drawings
For content of the present utility model is more likely to be clearly understood, the below is described in further detail the utility model, wherein according to specific embodiment of the utility model also by reference to the accompanying drawings
Fig. 1 is the profile of the utility model miniature circuit breaker;
Fig. 2 is the yoke expanded view of the utility model miniature circuit breaker;
Fig. 3 is the yoke of the utility model miniature circuit breaker and the location diagram of striking pin.
Reference numeral is expressed as among the figure: 1-arc control device, 2-yoke, 3-electromagnet, the 4-fixed contact, 5-moving contact, 6-striking pin, the 7-block, 8-bimetallic original paper, 9-base, the 10-insulation shell, the 11-handle, 12-threads off, the 13-tripping, 14-iron core, 15-input terminal, 16-lead-out terminal, 17-are led the arc plate, the 18-connecting rod.
Embodiment
Embodiment
Miniature circuit breaker of the present utility model as shown in Figure 1 comprises base 9; Insulation shell 10 covers on the described base 9; Described housing 10 inside are equipped with: arc control device 1; Over-current protection system; Yoke 2 is located on the described over-current protection system; Input terminal 15 is fixed on the shell; Lead-out terminal 16 is electrically connected with described over-current protection system; Also comprise fixed contact 4, be fixed on the described insulation crust; Moving contact 5, described moving contact and described insulation crust are flexibly connected, and be corresponding with described fixed contact 4, and be electrically connected with described input terminal 15; Free tripping mechanism is connected with described moving contact 5, is subjected to the control of over-current protection system to control the disjunction of described moving contact 5 and described fixed contact 4; Operating mechanism is located on the described insulation crust, is connected with described free tripping mechanism, is used for controlling described free tripping mechanism disjunction; Lead arc plate 17, one ends and be located at described arc control device 1 place, the other end is located at described fixed contact 4 places; Also comprise striking pin 6, described striking pin 6 one ends are located on the described yoke 2, and the other end extends to described moving contact 5 directions, and the electric arc that produces when being used for described moving contact 5 and described fixed contact 4 disjunction is introduced arc control device 1.As the disposable execution mode of another kind, described miniature circuit breaker can also comprise block, and described block is located in the described insulation crust 10, and described striking pin 6 leans on mutually with described block 7 sidewalls.
Yoke 2 expanded views as shown in Figure 2, described striking pin 6 are preferably with described yoke 2 one-body molded.As shown in Figure 3, described striking pin is preferably into 135 degree angles with described yoke.
In the above-mentioned execution mode, wherein, described free tripping mechanism is preferably and comprises tripping 13 and the dropout 12 that matches with described tripping.Described operating mechanism is preferably and comprises handle 11 and the connecting rod 18 that is hinged with handle.
The short circuit protection system of miniature circuit breaker is specifically as follows electromagnetic system, and described electromagnetic system comprises solenoid electromagnet 3 and iron core 14.When current circuit was short-circuited fault, electric current sharply increased, and the electromagnetic force that electromagnet 3 produces overcomes under the effect of reaction spring to be opened fast, cuts off current circuit, realizes current protecting function.
The working method of miniature circuit breaker of the present utility model is: after connecting electric loop, when loop current remains on load current value that small-sized short-circuiting device sets and when following, the thermal effect that the electric current of this moment produces makes the bimetallic original paper 8 generation thermal deformations of over-current protection system very little, and the dropout 12 that can not promote free tripping mechanism is triped; When loop current surpasses the rated current of setting; bimetallic original paper 8 temperature of over-current protection system raise, and have produced enough thermal deformations, have promoted dropout 12 and have triped; at this moment; moving contact 5 disconnects with fixed contact 4, cut-off loop, the electric arc that produces herein simultaneously; a part is introduced arc control device 1 by leading arc plate 17; part striking pin is introduced arc control device 1, and electric arc is extinguished rapidly, has guaranteed the reliability and security of miniature circuit breaker.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And the apparent variation of being extended out thus or change still are among the protection range of the utility model creation.
Claims (5)
1. a miniature circuit breaker comprises
Base (9);
Insulation shell (10) covers on the described base (9);
Described insulation shell (10) inside is equipped with:
Arc control device (1);
Over-current protection system;
Yoke (2) is located on the described over-current protection system;
Input terminal (15) is fixed on the described insulation shell (10);
Lead-out terminal (16) is electrically connected with described over-current protection system;
Fixed contact (4) is fixed on the described insulation shell (10);
Moving contact (5) is flexibly connected with described fixed contact (4) correspondingly with described insulation shell (10), and is electrically connected with described input terminal (15);
Free tripping mechanism is connected with described moving contact (5), is subjected to the control of over-current protection system to control the disjunction of described moving contact (5) and described fixed contact (4);
Operating mechanism is located on the described insulation shell (10), is connected with described free tripping mechanism, is used for controlling described free tripping mechanism disjunction;
Lead arc plate (17), an end is located at described arc control device (1) and is located, and the other end is located at described fixed contact (4) and is located; Characterized by further comprising:
Striking pin (6), one end are located on the described yoke (2), and the other end extends to described moving contact (5) direction, and the electric arc that produces when being used for described moving contact (5) and described fixed contact (4) disjunction is introduced arc control device (1).
2. circuit breaker according to claim 1, it is characterized in that: also comprise link stopper (7), described block is located in the described insulation crust (10), and described striking pin (6) leans on mutually with described block (7) sidewall.
3. miniature circuit breaker according to claim 1 and 2 is characterized in that: described striking pin (6) is 135 degree with the angle of described yoke (2).
4. miniature circuit breaker according to claim 3, it is characterized in that: described free tripping mechanism comprises tripping (13), and the dropout (12) that matches with described tripping (13).
5. miniature circuit breaker according to claim 4 is characterized in that: the connecting rod (18) that described operating mechanism comprises handle (11), is hinged with handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331661 CN202651039U (en) | 2012-07-10 | 2012-07-10 | Miniature breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331661 CN202651039U (en) | 2012-07-10 | 2012-07-10 | Miniature breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202651039U true CN202651039U (en) | 2013-01-02 |
Family
ID=47420104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220331661 Expired - Fee Related CN202651039U (en) | 2012-07-10 | 2012-07-10 | Miniature breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202651039U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161377A (en) * | 2015-09-25 | 2015-12-16 | 深圳供电局有限公司 | Direct-current micro circuit breaker and link mechanism for substation direct-current power supply |
| CN110033999A (en) * | 2019-04-19 | 2019-07-19 | 宁夏力成电气集团有限公司 | A kind of miniature circuit breaker and magnetic yoke mechanism |
-
2012
- 2012-07-10 CN CN 201220331661 patent/CN202651039U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161377A (en) * | 2015-09-25 | 2015-12-16 | 深圳供电局有限公司 | Direct-current micro circuit breaker and link mechanism for substation direct-current power supply |
| CN110033999A (en) * | 2019-04-19 | 2019-07-19 | 宁夏力成电气集团有限公司 | A kind of miniature circuit breaker and magnetic yoke mechanism |
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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: 20130102 Termination date: 20200710 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |