CN201336260Y - Miniature circuit breaker and electromagnetic trip thereof - Google Patents
Miniature circuit breaker and electromagnetic trip thereof Download PDFInfo
- Publication number
- CN201336260Y CN201336260Y CNU2008201805065U CN200820180506U CN201336260Y CN 201336260 Y CN201336260 Y CN 201336260Y CN U2008201805065 U CNU2008201805065 U CN U2008201805065U CN 200820180506 U CN200820180506 U CN 200820180506U CN 201336260 Y CN201336260 Y CN 201336260Y
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- iron core
- coil
- moving iron
- circuit breaker
- push rod
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Abstract
The utility model relates to an electromagnetic trip of a miniature circuit breaker. The electromagnetic trip comprises a push rod, a dynamic iron core, a magnetic spring, a coil and a coil framework, wherein the push rod is used for knocking a tripping mechanism so that the circuit breaker trips; the dynamic iron core is used for toggling the push rod; the magnetic spring is biased with the dynamic iron core towards the leaving direction of the push rod; the coil is used for generating electromagnetic field so that the dynamic iron core can be acted on by magnetic force with the direction being opposite to the acting force of the magnetic spring; the coil framework is wound by the coil; and the outermost layer winding of the coil is wound at one side that the coil framework is far away from the dynamic iron core. The utility model also provides a miniature circuit breaker with the electromagnetic trip. The utility model can reduce the detection fraction defective for the electromagnetic trip, thereby greatly reducing the waste caused by nonconforming products.
Description
Technical field
The utility model relates to the miniature circuit breaker field, particularly relates to the magnetictrip of miniature circuit breaker.
Background technology
As shown in Figure 1, a miniature circuit breaker (MCB) 10 generally includes: handle and related operating mechanism 11 thereof; Magnetictrip 12; Arc control device 13; Moving contact 14; Decide contact 15; Binding post 16 and 17 etc.
The magnetictrip 12 of miniature circuit breaker (MCB) is a moving protection component (short-circuit protection) of circuit breaker wink.Shown in Fig. 2 and 3, magnetictrip 12 generally includes moving iron core 21, coil 23, coil rack 24, magnetic red 22, push rod 27 etc.
When magnetictrip 12 was not switched at coil 23, moving iron core 21 remained on left side shown in Figure 2 under the effect of magnetic red 22.After coil 23 energising, produce magnetic field, moving iron core 21 is subjected to electromagnetic force to the right under the action of a magnetic field, square being directly proportional of electromagnetic force that moving iron core 21 is subjected to and exciting current, coil turn.This power to the right increases along with the increase of electric current.Moving iron core 21 transient equilibrium under the reaction force acts of electromagnetic force and magnetic red.When exciting current acquires a certain degree, this electromagnetic force to the right is during greater than the active force of magnetic red 22, and moving iron core 21 moves right, and makes moving iron core 21 promote push rods 27 motions.The tripping mechanism of push rod 27 bump operating mechanisms breaks away from and decides contacting of contact 15 thereby promote moving contact 14, makes circuit breaker trip.This electric current is exactly the setting current of magnetictrip, is the important parameter of MCB, and clearly regulation is arranged in state compulsory standard.Every MCB can detect this parameter on production line.Detecting defective then this MCB scraps.
In order to increase electromagnetic force.Static iron core and yoke etc. can be increased, as shown in Figure 4 in magnetictrip.
As shown in Figure 4, magnetictrip 12 comprises static iron core 26, moving iron core 21, yoke 25, coil 23, coil rack 24, magnetic red 22, push rod 27 etc.
When magnetictrip 12 was not switched at coil 23, moving iron core 21 kept a bigger air-gap with static iron core 26 under the effect of the elastic force of magnetic red 22.After coil 23 energisings, magnetic conductor is magnetized, and is so moving iron core 21 is subjected to the magnetic force of static iron core 26, opposite with the elastic force direction of magnetic red 22.Square being directly proportional of magnetic force that moving iron core 21 is subjected to and exciting current, coil turn.This magnetic force increases along with the increase of electric current.Moving iron core 21 transient equilibrium under the reaction force acts of magnetic force and magnetic red.When exciting current acquires a certain degree, magnetic force is during greater than the reaction force of magnetic red, and moving iron core 21 setting in motions make moving iron core 21 promote push rods 27 motions.The tripping mechanism of push rod 27 bump operating mechanisms breaks away from and decides contacting of contact 15 thereby promote moving contact 14, makes circuit breaker trip.This electric current is exactly the setting current of magnetictrip, is the important parameter of MCB, and clearly regulation is arranged in state compulsory standard.Every MCB can detect this parameter on production line.Detecting defective then this MCB scraps.
For the less MCB of rated current, in order to obtain enough electromagnetic forces, the turn ratio of coil is more, often needs the above coil of coiling one deck.In present coil design, do not realize the coil winding mode to the magnetictrip Effect on Performance, often additional several circles around as illustrated in fig. 1 and 2 the left side (near one side of moving iron core).Under this coiling mode, electromagnetic force is responsive to the rigging error of coil foozle and coil, causes the setting currents of electromagnetic trips instability.For example for shown in Figure 1 be the MCB of rated current 6A, disqualification rate nearly 9% has caused great waste.
The utility model content
The purpose of this utility model provides a kind of magnetictrip of miniature circuit breaker, makes setting currents of electromagnetic trips more stable than prior art, to reduce disqualification rate.
The purpose of this utility model provides a kind of miniature circuit breaker, make wherein the setting current of magnetictrip more stable than prior art, to reduce disqualification rate.
The utility model provides a kind of magnetictrip of miniature circuit breaker, and described magnetictrip comprises: be used for by the bump tripping mechanism make circuit breaker trip push rod, be used to touch push rod moving iron core, towards the magnetic red of the moving iron core of the direction biasing of leaving push rod, generate an electromagnetic field so as moving iron core be subjected to the coil of the rightabout magnetic force of active force of magnetic red, on it around the coil rack of coil; It is characterized in that the outermost layer of described coil is wound on the side away from moving iron core of coil rack.
The utility model provides a kind of miniature circuit breaker, described circuit breaker comprises magnetictrip, and described magnetictrip comprises: be used for by the bump tripping mechanism make circuit breaker trip push rod, be used to touch push rod moving iron core, towards the magnetic red of the moving iron core of the direction biasing of leaving push rod, generate an electromagnetic field so as moving iron core be subjected to the coil of the rightabout magnetic force of active force of magnetic red, on it around the coil rack of coil; It is characterized in that the outermost layer of described coil is wound on the side away from moving iron core of coil rack.
The utility model provides a kind of magnetictrip of miniature circuit breaker, and described magnetictrip comprises: be used for making the push rod of circuit breaker trip by the bump tripping mechanism; The coil that generates an electromagnetic field; Produce moving iron core, static iron core and the yoke of electromagnetic force in electromagnetic field, described electromagnetic force promotes along described moving iron core to act on the described moving iron core on the direction of described push rod; Magnetic red towards the moving iron core of direction biasing that leaves push rod; On it around the coil rack of coil; It is characterized in that the outermost layer of described coil is wound on the side away from moving iron core of coil rack.
The utility model provides a kind of miniature circuit breaker, and described circuit breaker comprises magnetictrip, and described magnetictrip comprises: be used for making the push rod of circuit breaker trip by the bump tripping mechanism; The coil that generates an electromagnetic field; Produce moving iron core, static iron core and the yoke of electromagnetic force in electromagnetic field, described electromagnetic force promotes along described moving iron core to act on the described moving iron core on the direction of described push rod; Magnetic red towards the moving iron core of direction biasing that leaves push rod; On it around the coil rack of coil; It is characterized in that the outermost layer of described coil is wound on the side away from moving iron core of coil rack.
The detection disqualification rate of magnetictrip of the present utility model reduces greatly, has reduced the waste that substandard product causes greatly, is with a wide range of applications.
Description of drawings
Advantage of the present utility model and characteristics will more clearly understand from the following explanation of the utility model preferred embodiment of providing as the indefiniteness example and showing in the accompanying drawings, wherein:
Fig. 1 illustrates the general structural representation of miniature circuit breaker;
Fig. 2 has shown traditional magnetictrip schematic diagram;
Fig. 3 has shown the general decomposition texture schematic diagram of magnetictrip;
Fig. 4 has shown the general decomposition texture schematic diagram of another magnetictrip;
Fig. 5 has shown the schematic diagram of the circuit breaker of using magnetictrip of the present utility model.
Embodiment
The utility model is applied in the miniature circuit breaker.Be specifically,, the coiling mode of coil improved for the magnetictrip of miniature circuit breaker, the outermost coiling in the coil more than coiling one deck around the right shown in Figure 5 (away from one side of moving iron core).Facts have proved that the stability of setting currents of electromagnetic trips after the improvement is good, the dropout of MCB magnetic detects disqualification rate and reduces greatly.
Below in conjunction with accompanying drawing in detail description the utility model is described in detail.
As shown in Figure 5, miniature circuit breaker of the present utility model (MCB) 50 for example can comprise: handle and related operating mechanism 51 thereof; Magnetictrip 52; Arc control device 53; Moving contact 54; Decide contact 55; Binding post 56 and 57 etc.
The structure of above-mentioned miniature circuit breaker only is for example, rather than limits.The utility model is applicable in other circuit breakers that have magnetictrip.The principle of circuit breaker and structure are and well known to a person skilled in the art and repeat no more content.
Magnetictrip 12 main distinctions of magnetictrip of the present utility model 52 and prior art are that the coiling mode with the coil of magnetictrip changes, and promptly the structure of coil changes, and remainder still can be continued to use prior art constructions.Therefore, the parts of the magnetictrip in the following description are still continued to use the numbering among Fig. 3-4.
With reference to figure 3 and Fig. 5, magnetictrip 52 of the present utility model can comprise moving iron core 21, coil 23, coil rack 24, magnetic red 22, push rod 27 etc.
When magnetictrip 52 was not switched at coil 23, moving iron core 21 remained on left side shown in Figure 5 under the effect of magnetic red 22.After coil 23 energising, produce magnetic field, moving iron core 21 is subjected to electromagnetic force to the right under the action of a magnetic field, square being directly proportional of electromagnetic force that moving iron core 21 is subjected to and exciting current, coil turn.This power to the right increases along with the increase of electric current.Moving iron core 21 transient equilibrium under the reaction force acts of electromagnetic force and magnetic red.When exciting current acquires a certain degree, this electromagnetic force to the right is during greater than the active force of magnetic red 22, and moving iron core 21 moves right, and makes moving iron core 21 promote push rods 27 motions.The tripping mechanism of push rod 27 bump operating mechanisms breaks away from and decides contacting of contact 15 thereby promote moving contact 14, makes circuit breaker trip.
Generally, coil turn is few has only 1 circle, and many have 100 multi-turns, decides on the rated current of circuit breaker.Coil turn is many, often has discontented one deck " remnant " during winding and occurs.The winding of coil be ground floor from a side to opposite side, then the second layer from this opposite side to this side, and the like.Usually, " remnant " of the outermost discontented one deck of coil of the prior art coiling can be around the left side shown in Figure 1 (near one side of moving iron core 21).
In the utility model, the outermost coil-winding of coil 23 is less than one whole layer often, and it has occupied the part of the whole length of coil.Different with the coil of prior art, the coil-winding of outermost one deck of coil 23 of the present utility model (being the coiling of less than one whole layer) is around the right shown in Figure 5 (away from one side of moving iron core 21).Coil after the improvement, the active force of electromagnet is than big before improving.Constant for the design load that guarantees magnetic dropout setting current, should suitably strengthen the active force of magnetic red.
Coil after evidence improves, the electromagnet active force is responsive no longer so to the error of magnetictrip manufacturing and assembling, and the setting value stability of electric current is significantly improved than traditional coil.
For example, through evidence, be that the MCB magnetictrip of 6A detects disqualification rate and dropped to below 1% for rated current, reduced the waste that substandard product causes greatly.
Obviously, coil design improvement project of the present utility model is applicable to the coil of all coils number of turn greater than the magnetictrip of one deck, is with a wide range of applications.
For increase shown in Figure 4 in the magnetictrip of static iron core and yoke, also can use principle of the present utility model to be improved.
Shown in Figure 4 and 5, magnetictrip 52 of the present utility model can comprise static iron core 26, moving iron core 21, yoke 25, coil 23, coil rack 24, magnetic red 22, push rod 27 etc.
When magnetictrip 52 was not switched at coil 23, moving iron core 21 kept a bigger air-gap with static iron core 26 under the effect of the elastic force of magnetic red 22.After coil 23 energisings, magnetic conductor is magnetized, and is so moving iron core 21 is subjected to the magnetic force of static iron core 26, opposite with the elastic force direction of magnetic red 22.Square being directly proportional of magnetic force that moving iron core 21 is subjected to and exciting current, coil turn.This magnetic force increases along with the increase of electric current.Moving iron core 21 transient equilibrium under the reaction force acts of magnetic force and magnetic red.When exciting current acquires a certain degree, magnetic force is during greater than the reaction force of magnetic red, and moving iron core 21 setting in motions make moving iron core 21 promote push rods 27 motions.The tripping mechanism of push rod 27 bump operating mechanisms breaks away from and decides contacting of contact 15 thereby promote moving contact 14, makes circuit breaker trip.
In the utility model, the coil-winding of the outermost less than one whole layer of coil 23 is around the right shown in Figure 5 (away from one side of moving iron core 21).Coil after the improvement, the active force of electromagnet is than big before improving.Constant for the design load that guarantees magnetic dropout setting current, should suitably strengthen the active force of magnetic red.
Structure of the present utility model has been described above in conjunction with the accompanying drawings.Those skilled in the art can know that embodiment of the present utility model only is for example rather than limits.
Claims (4)
1, a kind of magnetictrip of miniature circuit breaker, described magnetictrip comprises: be used for by the bump tripping mechanism make circuit breaker trip push rod, be used to touch push rod moving iron core, towards the magnetic red of the moving iron core of the direction biasing of leaving push rod, generate an electromagnetic field so as moving iron core be subjected to the coil of the rightabout magnetic force of active force of magnetic red, on it around the coil rack of coil; It is characterized in that the outermost layer of described coil is wound on the side away from moving iron core of coil rack.
2, a kind of miniature circuit breaker, described circuit breaker comprises magnetictrip, and described magnetictrip comprises: be used for by the bump tripping mechanism make circuit breaker trip push rod, be used to touch push rod moving iron core, towards the magnetic red of the moving iron core of the direction biasing of leaving push rod, generate an electromagnetic field so as moving iron core be subjected to the coil of the rightabout magnetic force of active force of magnetic red, on it around the coil rack of coil; It is characterized in that the outermost layer of described coil is wound on the side away from moving iron core of coil rack.
3, a kind of magnetictrip of miniature circuit breaker, described magnetictrip comprises: be used for making the push rod of circuit breaker trip by the bump tripping mechanism; The coil that generates an electromagnetic field; Produce moving iron core, static iron core and the yoke of electromagnetic force in electromagnetic field, described electromagnetic force promotes along described moving iron core to act on the described moving iron core on the direction of described push rod; Magnetic red towards the moving iron core of direction biasing that leaves push rod; On it around the coil rack of coil; It is characterized in that the outermost layer of described coil is wound on the side away from moving iron core of coil rack.
4, a kind of miniature circuit breaker, described circuit breaker comprises magnetictrip, described magnetictrip comprises: be used for making the push rod of circuit breaker trip by the bump tripping mechanism; The coil that generates an electromagnetic field; Produce moving iron core, static iron core and the yoke of electromagnetic force in electromagnetic field, described electromagnetic force promotes along described moving iron core to act on the described moving iron core on the direction of described push rod; Magnetic red towards the moving iron core of direction biasing that leaves push rod; On it around the coil rack of coil; It is characterized in that the outermost layer of described coil is wound on the side away from moving iron core of coil rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201805065U CN201336260Y (en) | 2008-12-02 | 2008-12-02 | Miniature circuit breaker and electromagnetic trip thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201805065U CN201336260Y (en) | 2008-12-02 | 2008-12-02 | Miniature circuit breaker and electromagnetic trip thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201336260Y true CN201336260Y (en) | 2009-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201805065U Expired - Lifetime CN201336260Y (en) | 2008-12-02 | 2008-12-02 | Miniature circuit breaker and electromagnetic trip thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201336260Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013107188A1 (en) * | 2012-01-20 | 2013-07-25 | 浙江鼎威科技有限公司 | Ultrathin miniature circuit breaker |
| CN110137044A (en) * | 2019-05-30 | 2019-08-16 | 天津加美特电气设备有限公司 | A kind of intelligent circuit breaker with normally-open normally-close function |
-
2008
- 2008-12-02 CN CNU2008201805065U patent/CN201336260Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013107188A1 (en) * | 2012-01-20 | 2013-07-25 | 浙江鼎威科技有限公司 | Ultrathin miniature circuit breaker |
| CN110137044A (en) * | 2019-05-30 | 2019-08-16 | 天津加美特电气设备有限公司 | A kind of intelligent circuit breaker with normally-open normally-close function |
| CN110137044B (en) * | 2019-05-30 | 2024-02-02 | 天津加美特电气股份有限公司 | Intelligent circuit breaker with normally open and normally closed functions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091028 |