CN204011322U - Release for circuit breaker - Google Patents
Release for circuit breaker Download PDFInfo
- Publication number
- CN204011322U CN204011322U CN201420464264.8U CN201420464264U CN204011322U CN 204011322 U CN204011322 U CN 204011322U CN 201420464264 U CN201420464264 U CN 201420464264U CN 204011322 U CN204011322 U CN 204011322U
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- current
- circuit breaker
- release
- tripping mechanism
- electric current
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Abstract
Embodiment of the present disclosure relates to a kind of release for circuit breaker, comprising: wire conductors (1), for being connected with the operating circuit of described circuit breaker; Current Mutual Inductance coil (2), it arranges around described wire conductors (1); And thermal tripping mechanism and/or magnetic tripping mechanism (3), it has the electric current induction element (4) that is electrically connected to described Current Mutual Inductance coil (2); Wherein, described thermal tripping mechanism and/or magnetic tripping mechanism (3) are configured to the electric current of responding to based on described Current Mutual Inductance coil (2) and move so that described circuit breaker tripping.This release can be used for large specified current applications, and can standardization for the manufacture of the release of different rated current.
Description
Technical field
Each execution mode of the present disclosure relates to field of circuit breakers, relates in particular to the release of circuit breaker.
Background technology
Pyromagnetic release is the realization overload of circuit breaker and the element of short-circuit protection function, and the circuit breaker forming is thus subject to liking of users deeply because of its outstanding cost performance.The operation principle of the heat protection in common Pyromagnetic release is: while passing through normal current in circuit; heater element heating makes bimetal leaf be bent to a certain degree (just touching transmission mechanism) and reach dynamic balance state, and bimetal leaf no longer continues bending.If while there is overload phenomenon; in circuit, electric current increases, and makes the caloric value of heater element increase and cause bimetal leaf to continue bending, and promotes free tripping mechanism release main contact by transmission mechanism; main contact separately, cuts off the effect that circuit plays overload protection under the effect of tripping spring.
Because the operation principle of Pyromagnetic release is limit, when rated current is greater than 800A, the Pyromagnetic release of prior art is because temperature rise is too high and former thereby be difficult to realize to the restriction of the volume of heater element etc.
Prior art compared with the overload release of tension circuit breaking having high nominal current, be electronic type.It is by the size of current that flows through circuit breaker is made comparisons transship judgement with setting current value, and drives tripping mechanism to move based on judged result.This electronic overload release can not be detected due to bad produced overheated of the inside and outside connection of circuit breaker, and owing to adopting electronic device to there is higher cost.
Therefore,, due to reason and functional reason of economy, the demand of Pyromagnetic release exists equally on the circuit breaker of larger rated current.
Utility model content
In view of the foregoing, embodiment of the present disclosure provides a kind of release for circuit breaker, comprising: wire conductors, for being connected with the operating circuit of described circuit breaker; Current Mutual Inductance coil, it is around described wire conductors setting; And thermal tripping mechanism and/or magnetic tripping mechanism, it has the electric current induction element that is electrically connected to described Current Mutual Inductance coil; Wherein, described thermal tripping mechanism and/or magnetic tripping mechanism are configured to the electric current of responding to based on described Current Mutual Inductance coil and move so that described circuit breaker tripping.The electric current no-load voltage ratio of the current transformer forming by Current Mutual Inductance coil and wire conductors, release can carry out heat dropout and magnetic is threaded off by the relatively little induced current of detection and response, with the circuit breaker operating current for large, realizes overcurrent and short-circuit protection.And; owing to can different electric current no-load voltage ratios being set for the rated operational current of different sizes; therefore make induced current size identical, can use heat/magnetic tripping mechanism of same size to realize overcurrent and the short-circuit protection of the circuit breaker of different rated current, make product manufacturer's standard.
According to another aspect of the present disclosure, described electric current induction element is configured to the operating current of guiding in the coil-induced described wire conductors of described Current Mutual Inductance and the induced current that produces.
According to another aspect of the present disclosure, described electric current induction element is configured to when described induced current is flowed through, generate heat and produce distortion, and when described induced current surpasses overcurrent threshold value, described electric current induction element produces enough distortion makes described circuit breaker tripping so that thermal tripping mechanism moves.
According to another aspect of the present disclosure, described electric current induction element can be bimetal leaf.
According to another aspect of the present disclosure, described magnetic tripping mechanism also comprises: the yoke arranging around described electric current induction element; And armature; When wherein the described induced current in described electric current induction element surpasses short circuit current threshold value, the magnetic attraction producing between described yoke and described armature makes described armature movement so that described circuit breaker tripping.
According to another aspect of the present disclosure, described thermal tripping mechanism and/or magnetic tripping mechanism also comprise snap close and hammer; And wherein when the action of described thermal tripping mechanism, the bending of described electric current induction element to be to promote described latch pivot, thereby discharges described hammer, to make hammer movement and drive described circuit breaker tripping.In addition, also can replace aforesaid thermal tripping mechanism and/or magnetic tripping mechanism with various heat/magnetic tripping mechanisms known in the art or that occur in the future.
According to another aspect of the present disclosure, a kind of circuit breaker is provided, comprise above-mentioned release.This circuit breaker has the above-mentioned advantage of release of the present utility model equally.
Accompanying drawing explanation
When read by reference to the accompanying drawings below exemplary embodiment detailed description time, these and other object, feature and advantage will become apparent, in the accompanying drawings:
Fig. 1 is according to the schematic diagram of the release of execution mode of the present utility model;
Fig. 2 shows the action of the thermal tripping mechanism of the release in Fig. 1;
Fig. 3 shows the action of the magnetic tripping mechanism of the release in Fig. 1.
Embodiment
To only by exemplary approach, describe various execution mode of the present disclosure in detail now.
Fig. 1 is according to the schematic diagram of the release of execution mode of the present utility model.This release forms a part for circuit breaker.This release comprises wire conductors 1, for being connected with the operating circuit of circuit breaker.Particularly, the binding post that wire conductors 1 one end can be used as circuit breaker is connected to operating circuit for user, and its other end is electrically connected to a contact of the switch of circuit breaker.In the execution mode shown in Fig. 1, client's copper busbar that this wire conductors 1 is circuit breaker.
This release also comprises a Current Mutual Inductance coil 2, and it arranges around wire conductors 1, forms thus a current transformer.While passing through alternating current in wire conductors 1, according to the law of electromagnetic induction, in Current Mutual Inductance coil 2, can produce induced electromotive force.The size of this induced electromotive force depends on the size of current of flowing through in wire conductors 1 and the electromagnetic property of Current Mutual Inductance coil 2.
This release also comprises thermal tripping mechanism and/or magnetic tripping mechanism 3, and it has the electric current induction element 4 that is electrically connected to Current Mutual Inductance coil 2.This electric current induction element 4 is connected between two ends of Current Mutual Inductance coil 2, thereby forms the loop of a sealing.While passing through alternating current in wire conductors 1, the induced electromotive force producing in Current Mutual Inductance coil 2 will generate induced current in this loop.
Thermal tripping mechanism and/or magnetic tripping mechanism 3, when the induced current of its electric current induction element 4 of flowing through is enough large, will move so that circuit breaker tripping and separating brake is realized overcurrent and/or short-circuit protection.This thermal tripping mechanism and/or magnetic tripping mechanism 3 can be various known thermo magnetic trip release devices.Common thermo magnetic trip release device has specified operating current, the hot drop-away current value of specified overcurrent and specified short circuit magnetic drop-away current value.When the induced current in electric current induction element 4 is no more than thermo magnetic trip release device and has specified working current value, this thermo magnetic trip release device can not move; And induced current in electric current induction element 4 is while reaching the hot drop-away current value of overcurrent of thermo magnetic trip release device, thermal tripping mechanism will move so that circuit breaker tripping separating brake; And induced current in electric current induction element 4 is while reaching the short circuit magnetic drop-away current value of thermo magnetic trip release device, magnetic tripping mechanism will move so that circuit breaker tripping separating brake.
According to the law of electromagnetic induction, the faradic large young pathbreaker in Current Mutual Inductance coil 2 is directly proportional to the size of the operating current of the wire conductors 1 of flowing through.Those skilled in the art can understand, by coil diameter and the number of turn of Current Mutual Inductance coil 2 are set, and the ratio of the operating current size of flowing through in the induced current size that can adjust Current Mutual Inductance coil 2 and wire conductors 1.Therefore, by the parameter of Current Mutual Inductance coil 2 is suitably set, can so that the induced current of the electric current induction element 4 of flowing through with respect to the reduced several times of operating current of the wire conductors 1 of flowing through, so that it is reduced within the scope of the rated condition in thermal tripping mechanism and/or magnetic tripping mechanism 3.To rated operational current, the operating current during with overcurrent becomes same ratio to dwindle to induced current by Current Mutual Inductance coil 2 induction.Therefore, when there is overcurrent, with respect to the ratio of rated value, the value during at overcurrent is also identical with respect to the ratio of its rated value to the induced current after dwindling with operating current.Like this, due to the overcurrent value of thermal tripping mechanism and/or magnetic tripping mechanism 3 and short-circuit current value be all multiple based on rated operational current set (for example hot drop-away current Threshold is rated operational current 1.05 times, magnetic drop-away current threshold value is set as 1.3 times of rated operational current conventionally), therefore the induced current after, reduced can reflect overcurrent and the short-circuit condition of the relatively large operating current in wire conductors 1 identically.That is to say, when the operating current in wire conductors 1 reaches the predetermined overcurrent multiple of rated operational current, now induced current is also by the faradic same overcurrent multiple reaching under rated operational current.Therefore; by the electric current no-load voltage ratio of suitable setting Current Mutual Inductance coil 2; value after thermal tripping mechanism and/or the rated current of magnetic tripping mechanism 3 and the rated operational current of circuit breaker dwindle by this no-load voltage ratio is matched, for the thermal tripping mechanism of relatively low current and/or magnetic tripping mechanism 3, just can be used for detecting exactly overcurrent and short-circuit detecting and the protection of relatively large electric current.
Use a kind of thermo magnetic trip release mechanism 3, it can be divided into thermal tripping mechanism and magnetic tripping mechanism.Thermal tripping mechanism comprises electric current induction element 4.This electric current induction element 4 can generate heat and produce distortion when induced current is flowed through, with towards curving.This electric current induction element 4 is for example bimetal leaf.Electric current induction element 4 bottom end are electrically connected to one end of Current Mutual Inductance coil 2, and the other end of electric current induction element 4 (free end) is electrically connected to the other end of Current Mutual Inductance coil 2 by a conduction pigtail 9, to form closed-loop path with Current Mutual Inductance coil 2.This thermal tripping mechanism 3 also comprises snap close 5 and hammer 6.Snap close 5 pivotables are installed and are remained on latched position by a back-moving spring (not shown).Hammer 6 can be installed on horizontal movement ground, and by a biasing spring (not shown) against.Because snap close 5 spring that is reset remains on horizontal level, the biased spring of hammer 6 against loading and level against snap close 5, therefore the power that hammer 6 applies to snap close 5 cannot make snap close 5 pivotables due to the pivot by snap close 5, thereby snap close 5 will remain on horizontal level so that hammer 6 is locked in to original position and is failure to actuate.Between electric current induction element 4 and snap close 5, there is certain interval, to allow under rated operational current state, the bending that electric current induction element 4 is certain because heating produces, but can be against snap close 5, even if or can not promote angle that snap close 5 pivotables are enough to discharge hammer 6 against snap close 5.
As shown in Figure 2, when the operating current of flowing through in wire conductors 1 meets or exceeds overcurrent, the electric current that Current Mutual Inductance coil 2 is responded to also will meet or exceed the overcurrent of thermal tripping mechanism 3.Now, electric current induction element 4 will produce larger heat and thereby produce larger flexural deformation, make it possible to promote angle that snap close 5 pivotables are enough to discharge hammer 6.D/d hammer 6 by under the effect of biasing spring to the left side motion in Fig. 2, to trigger circuit breaker, occur to thread off and separating brake, thereby realize overcurrent protection function.The concrete mechanism for the separating brake of threading off of circuit breaker is the known technology of this area, thereby does not repeat them here.
Get back to Fig. 1, the magnetic tripping mechanism of this thermo magnetic trip release mechanism 3 also utilizes this electric current induction element 4, and comprises in addition the armature 7 that a pivotable is installed and the yoke 8 that is fixedly mounted on electric current induction element 4 bottoms.These yoke 8 parts arrange around electric current induction element 4.Armature 7 and yoke 8 are all comprised of soft magnetic bodies.While producing induced current in electric current induction element 4, in the magnetic conduction path that armature 7 and yoke 8 surround, produce magnetic field, make to produce magnetic attraction between armature 7 and yoke 8.Because armature 7 is retrained by a back-moving spring (not shown), in rated operational current, the magnetic attraction that induced current produces is not enough to overcome the restraining force of back-moving spring and makes angle that armature 7 pivotables are enough to promote snap close 5.And when being short-circuited (with reference to accompanying drawing 3), the corresponding increase of induced current, makes the magnetic attraction producing between armature 7 and yoke 8 also be pivoted to the position that promotes snap close 5 even as big as making armature 7 overcome the restraining force of back-moving spring.Similar with the situation of overcurrent, snap close 5 will be pushed angle that pivotable is enough to discharge hammer 6.D/d hammer 6 by under the effect of biasing spring to the left side motion in Fig. 3, to trigger circuit breaker, occur to thread off and separating brake, thereby realize short-circuit protection function.Therefore, this snap close 5 and hammer 6 also form a part for magnetic tripping mechanism.
The current transformer structure forming by Current Mutual Inductance coil 2 and wire conductors 1, can by the operating current of circuit breaker scaled be induced current.Therefore, thermo magnetic trip release mechanism only need meet this less induced current and can normally work.This makes without the heater element (being electric current induction element) for example providing, for relatively large operating current (electric current more than 800A), and for relatively large operating current provide heater element normally difficulty because its caloric value size excessive and element is restricted.Therefore, by the thermo magnetic trip release mechanism for little electric current, can realize the overcurrent of large electric current and short-circuit protection.
On the other hand; owing to can regulating by different Current Mutual Inductance coil 2 parameters are set the no-load voltage ratio of induced current and operating current; therefore for different big or small rated operational currents; can use the thermo magnetic trip release mechanism of same size; and only by regulating this electric current no-load voltage ratio; make the operating currents of different sizes can induce the induced current within the scope of the rated current of Gai thermo magnetic trip release mechanism, make this thermo magnetic trip release mechanism can be applicable to overcurrent and the short-circuit protection of different current ranges.For example, for the circuit breaker of 800A operating current, the electric current no-load voltage ratio of current transformer is set to 1:18.8, the corresponding 42.6A of induced current.According to 1.05 times of rated current, as hot drop-away current threshold value, 1.3 times of rated current are as magnetic drop-away current threshold calculations, for the heat of the thermo magnetic trip release mechanism of release of the present utility model, thread off and magnetic dropout threshold current is respectively 44.7A and 55.3A.In order to use the thermo magnetic trip release mechanism of same size, circuit breaker for 1000A, 1250A and 1600A rated operational current, only need the electric current no-load voltage ratio of current transformer to be respectively set to 1:23.5,1:29.4 and 1:37.6, the induced current producing will be 42.6A equally, and equally according to 1.05 times with 1.3 times of rated current are threaded off as heat and during magnetic drop-away current threshold value, the heat of thermo magnetic trip release mechanism thread off and during magnetic dropout induced current be also all respectively 44.7A and 55.3A.Therefore,, for the different rated operational currents of circuit breaker, can use the thermo magnetic trip release mechanism of same size.The needs that this has been avoided for different operating current range Design and manufacture multiple different size thermo magnetic trip release mechanism and release, make the manufacture of release can standardization, and its manufacturing cost can be reduced.
Should be appreciated that and can replace the thermo magnetic trip release mechanism 3 adopting in the execution mode of Fig. 1 with the various heat dropouts and/or the magnetic tripping mechanism that occur known or future now, and needn't there is thermal tripping mechanism and magnetic tripping mechanism simultaneously.And release of the present utility model can be in the electric equipments such as various circuit breakers.
Should understand, the object of describing for convenience, the orientation of wire conductors 1 horizontal positioned based on release is described herein.The direction of " upper and lower, left and right " herein is all described based on this location.Obviously, as required, this release can be with various towards arranging.And herein the directivity of " upper and lower, left and right " between described each feature describe all by along with release, places towards variation and variation accordingly, but relative position relation between each feature will can not change.
For the object that illustrates and describe, provided specification of the present disclosure, but it is not intended to be exhaustive or be limited to disclosed form.It may occur to persons skilled in the art that a lot of modifications and variant.
Therefore; execution mode is for principle of the present disclosure, practical application being described better and making the other staff in those skilled in the art can understand following content and select and describe;; do not departing under the prerequisite of disclosure spirit, all modifications of making and replacement all will fall in the disclosure protection range of claims definition.
Claims (8)
1. for a release for circuit breaker, comprising:
Wire conductors (1), for being connected with the operating circuit of described circuit breaker;
Current Mutual Inductance coil (2), it arranges around described wire conductors (1); And
Thermal tripping mechanism and/or magnetic tripping mechanism (3), it has the electric current induction element (4) that is electrically connected to described Current Mutual Inductance coil (2);
Wherein, described thermal tripping mechanism and/or magnetic tripping mechanism (3) are configured to the electric current of responding to based on described Current Mutual Inductance coil (2) and move so that described circuit breaker tripping.
2. release according to claim 1, wherein said electric current induction element (4) is configured to that guiding is responded to the operating current of (1) in described wire conductors by described Current Mutual Inductance coil (2) and the induced current that produces.
3. release according to claim 2, wherein said electric current induction element (4) is configured to when described induced current is flowed through, generate heat and produce distortion, and when described induced current surpasses overcurrent threshold value, described electric current induction element produces enough distortion makes described circuit breaker tripping so that thermal tripping mechanism moves.
4. release according to claim 3, wherein said electric current induction element (4) is bimetal leaf.
5. according to the release one of claim 2-4 Suo Shu, wherein said magnetic tripping mechanism also comprises:
The yoke (8) arranging around described electric current induction element; And
Armature (7);
When wherein the described induced current in described electric current induction element (4) surpasses short circuit current threshold value, the magnetic attraction producing between described yoke (8) and described armature (7) makes described armature (7) action so that described circuit breaker tripping.
6. according to the release one of claim 3-4 Suo Shu, wherein said thermal tripping mechanism also comprises snap close (5) and hammer (6); And
Wherein, when described thermal tripping mechanism action, described electric current induction element (4) is crooked to promote described snap close (5) pivotable, thereby discharges described hammer (6), hammer (6) is moved and drive described circuit breaker tripping.
7. release according to claim 5, wherein said magnetic tripping mechanism also comprises snap close (5) and hammer (6); And
Wherein, when described thermal tripping mechanism action, described electric current induction element (4) is crooked to promote described snap close (5) pivotable, thereby discharges described hammer (6), hammer (6) is moved and drive described circuit breaker tripping.
8. a circuit breaker, comprises according to the release one of aforementioned claim Suo Shu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420464264.8U CN204011322U (en) | 2014-08-15 | 2014-08-15 | Release for circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420464264.8U CN204011322U (en) | 2014-08-15 | 2014-08-15 | Release for circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204011322U true CN204011322U (en) | 2014-12-10 |
Family
ID=52051282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420464264.8U Expired - Lifetime CN204011322U (en) | 2014-08-15 | 2014-08-15 | Release for circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204011322U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448613A (en) * | 2014-08-15 | 2016-03-30 | 施耐德电气工业公司 | Release used for breaker |
| CN108257832A (en) * | 2018-04-02 | 2018-07-06 | 浙江智美电气有限公司 | A kind of adjustable small-sized heavy current breaker of drop-away current |
-
2014
- 2014-08-15 CN CN201420464264.8U patent/CN204011322U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448613A (en) * | 2014-08-15 | 2016-03-30 | 施耐德电气工业公司 | Release used for breaker |
| CN105448613B (en) * | 2014-08-15 | 2019-05-07 | 施耐德电气工业公司 | Buckle releaser for breaker |
| CN108257832A (en) * | 2018-04-02 | 2018-07-06 | 浙江智美电气有限公司 | A kind of adjustable small-sized heavy current breaker of drop-away current |
| CN108257832B (en) * | 2018-04-02 | 2019-06-07 | 浙江智美电气有限公司 | A kind of adjustable small-sized heavy current breaker of drop-away current |
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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: 20141210 |