CN218160236U - Circuit breaker overload release, circuit breaker and circuit protection system - Google Patents
Circuit breaker overload release, circuit breaker and circuit protection system Download PDFInfo
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- CN218160236U CN218160236U CN202222568028.8U CN202222568028U CN218160236U CN 218160236 U CN218160236 U CN 218160236U CN 202222568028 U CN202222568028 U CN 202222568028U CN 218160236 U CN218160236 U CN 218160236U
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- circuit breaker
- bimetallic strip
- overload release
- bimetal
- piece
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Abstract
The utility model discloses a circuit breaker overload release, circuit breaker and circuit protection system. The overload release of the circuit breaker comprises a bimetallic strip; the first soft connecting piece is connected with the bimetallic strip; the second soft connecting piece is connected with the bimetallic strip; and a flow diverter; the connecting position of the first soft connecting piece and the bimetallic strip is a first position, the connecting position of the second soft connecting piece and the bimetallic strip is a second position, the bimetallic strip between the first position and the second position is a current bearing part, one end of the shunt piece is connected to the first position, and the other end of the shunt piece is connected to the second position. The shunt piece is connected with the current bearing part of the bimetallic strip in parallel, so that the shunt piece can shunt current, the current flowing through the bimetallic strip is reduced, the heating degree of the bimetallic strip is reduced, and the temperature rise of the circuit breaker is reduced; meanwhile, the short-time heating degree of the bimetallic strip is reduced, the phenomenon that the bimetallic strip is fused due to excessive heating is reduced, and the breaking capacity of the circuit breaker is improved.
Description
Technical Field
The utility model relates to a circuit breaker overload release technical field especially relates to a circuit breaker overload release, circuit breaker and circuit protection system.
Background
As shown in fig. 1, the conventional directly-heated overload release generally includes a connecting plate, a first flexible connecting member, a bimetal, a second flexible connecting member and a moving contact, wherein two ends of the first flexible connecting member are respectively connected to the connecting plate and the bimetal, two ends of the second flexible connecting member are respectively connected to the bimetal and the moving contact, and when the moving contact is in contact with a fixed contact of a molded case circuit breaker, a load current sequentially flows through the first flexible connecting member, the bimetal and the second flexible connecting member from the connecting plate. Because the resistivity of the bimetallic strip is relatively large, when a load current flows through the bimetallic strip, the bimetallic strip generates heat greatly, so that the temperature rise of the circuit breaker is increased; meanwhile, when the short-circuit current is cut off, the bimetallic strip bears all the short-circuit current, so that the bimetallic strip is frequently fused due to serious heating, and the cutting-off capacity of the circuit breaker is reduced.
Therefore, how to reduce the temperature rise of the circuit breaker and improve the breaking capacity of the circuit breaker is a technical problem to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a circuit breaker overload release to reduce the temperature rise of circuit breaker, and promote the breaking capacity of circuit breaker.
In order to achieve the above object, the present invention provides the following technical solutions:
a circuit breaker overload trip for a circuit breaker, the circuit breaker overload trip comprising:
a bimetal;
the first soft connecting piece is connected with the bimetallic strip;
the second soft connecting piece is connected with the bimetallic strip; and
a flow divider;
wherein, first flexible connector with the hookup location of bimetallic strip is the first position, the second flexible connector with the hookup location of bimetallic strip is the second position, the first position with bimetallic strip between the two positions is the current carrier portion, the first position with form first connecting portion between the first end of bimetallic strip, the second position with form the second connecting portion between the second end of bimetallic strip, the first end does the bimetallic strip is close to the one end of first position, the second end does the bimetallic strip is close to the one end of second position, the one end of reposition of redundant personnel piece connect in first position or connect in first connecting portion, the other end of reposition of redundant personnel piece connect in the second position or connect in second connecting portion.
Optionally, in the overload release for a circuit breaker, the shunt member is a ductile metallic member.
Optionally, in the overload release for a circuit breaker, the shunt is woven by using copper wires.
Optionally, in the overload trip of the circuit breaker, two ends of the shunt member are respectively welded to two sides of the bimetal, or two ends of the shunt member are welded to the same side of the bimetal.
Optionally, in the overload release for a circuit breaker, one end of the first flexible connecting member, which is away from the bimetallic strip, is connected to a connecting plate, and the connecting plate is used for communicating with an external load.
Optionally, in the overload release for the circuit breaker, one end of the second flexible connecting member, which is far away from the bimetallic strip, is connected to a moving contact, and the circuit breaker includes a fixed contact and a transmission mechanism for driving the moving contact to move, so that the moving contact is driven by the transmission mechanism to move, and the moving contact and the fixed contact are connected or disconnected.
A circuit breaker includes a circuit breaker overload trip as described above.
Optionally, in the above circuit breaker, the circuit breaker further includes a base, a fixed contact and a transmission mechanism, where the fixed contact and the transmission mechanism are disposed on the base, and the transmission mechanism is configured to drive a moving contact of an overload release of the circuit breaker to move, so as to implement conduction or disconnection between the moving contact and the fixed contact.
A circuit protection system comprising a circuit breaker overload trip as described above.
When the circuit breaker overload release provided by the utility model is used, because the first soft connecting piece is connected with the bimetallic strip, the bimetallic strip is connected with the second soft connecting piece, the connection position of the first soft connecting piece and the bimetallic strip is the first position, the connection position of the second soft connecting piece and the bimetallic strip is the second position, the bimetallic strip between the first position and the two positions is the current bearing part, the first connection part is formed between the first position and the first end of the bimetallic strip, the second connection part is formed between the second position and the second end of the bimetallic strip, the first end is the end where the bimetallic strip is close to the first position, the second end is the end where the bimetallic strip is close to the second position, one end of the shunt piece is connected with the first position or the first connection part, and the other end of the shunt piece is connected with the second position or the second connection part; therefore, when the overload release of the circuit breaker is conducted with external current, the external current sequentially flows through the first soft connecting piece, the bimetallic strip and the second soft connecting piece, and the bimetallic strip bears the current through the current bearing part between the first position and the second position; one end of the shunt piece is directly connected to the first position or the first connecting part, and the other end of the shunt piece is directly connected to the second position or the second connecting part, so that the shunt piece is connected with the current bearing part of the bimetallic strip in parallel, when current flows through the bimetallic strip, the shunt piece can shunt the current, the current flowing through the bimetallic strip is reduced, the heating degree of the bimetallic strip is reduced, the temperature rise of the circuit breaker is reduced, and the circuit breaker is more energy-saving; meanwhile, when a very large short-circuit current is cut off, due to the shunting action of the shunting piece, the short-time heating degree of the bimetallic strip is reduced, the phenomenon that the bimetallic strip is fused due to excessive heating is reduced, and the breaking capacity of the circuit breaker is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an overload release of a circuit breaker provided in the prior art;
fig. 2 is a schematic structural diagram of an overload release of a circuit breaker according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another overload release for a circuit breaker according to an embodiment of the present invention.
Wherein 100 is a bimetallic strip, 200 is a first soft connecting piece, 300 is a second soft connecting piece, 400 is a shunt piece, 500 is a connecting plate, and 600 is a movable contact.
Detailed Description
In view of this, the utility model discloses a core lies in providing a circuit breaker overload release to reduce the temperature rise of circuit breaker, and promote the breaking capacity of circuit breaker.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 2 to 3, the embodiment of the utility model discloses a circuit breaker overload release for the circuit breaker, this circuit breaker overload release includes bimetallic strip 100, first soft connecting piece 200, second soft connecting piece 300 and reposition of redundant personnel piece 400.
Wherein, the first soft connecting piece 200 is connected with the bimetallic strip 100; the second soft connecting member 300 is connected with the bimetal strip 100; the connection position of the first soft connection member 200 and the bimetal 100 is a first position, the connection position of the second soft connection member 300 and the bimetal 100 is a second position, the bimetal 100 between the first position and the second position is a current carrying part, a first connection part is formed between the first position and the first end of the bimetal 100, a second connection part is formed between the second position and the second end of the bimetal 100, the first end is one end of the bimetal 100 close to the first position, the second end is one end of the bimetal 100 close to the second position, one end of the shunt member 400 is connected to the first position or connected to the first connection part, and the other end of the shunt member 400 is connected to the second position or connected to the second connection part.
When the circuit breaker overload release provided by the utility model is used, because first soft connecting piece 200 is connected with bimetallic strip 100, bimetallic strip 100 is connected with second soft connecting piece 300, the hookup location of first soft connecting piece 200 and bimetallic strip 100 is the first position, the hookup location of second soft connecting piece 300 and bimetallic strip 100 is the second position, bimetallic strip 100 between first position and the two positions is the current-carrying part, form first connecting part between first position and the first end of bimetallic strip 100, form the second connecting part between the second end of second position and bimetallic strip 100, first end is the one end that bimetallic strip 100 is close to the first position, the second end is the one end that bimetallic strip 100 is close to the second position, shunt 400's one end is connected in the first position or is connected in first connecting part, shunt 400's the other end is connected in the second position or is connected in the second connecting part; therefore, when the first soft connector 200 is conducted with an external current, the external current flows through the first soft connector 200, the bimetal strip 100 and the second soft connector 300 in sequence, and the bimetal strip 100 carries the current through the current carrying part between the first position and the second position; since one end of the shunt member 400 is connected to the first position or the first connection portion, and the other end of the shunt member 400 is connected to the second position or the second connection portion, the shunt member 400 is connected in parallel with the current carrying portion of the bimetal 100, and when a current flows through the bimetal 100, the shunt member 400 can shunt the current, so that the current flowing through the bimetal 100 is reduced, the heating degree of the bimetal 100 is reduced, the temperature rise of the circuit breaker is reduced, and the circuit breaker is more energy-saving; meanwhile, when a very large short-circuit current is cut off, due to the shunting action of the shunting piece 400, the short-time heating degree of the bimetallic strip 100 is reduced, the phenomenon that the bimetallic strip 100 is fused due to excessive heating is reduced, and the breaking capacity of the circuit breaker is improved.
It should be noted that, the above-mentioned first flexible connector 200 and second flexible connector 300 can be types such as copper wire stranded conductor, copper wire braided wire or alloy wire stranded conductor, as long as can guarantee that the circuit is unobstructed, and make the part type that moves with the moving contact steady motion that the flexible connector 300 is connected described below all belong to the utility model discloses the protection within range.
Further, the shunt member 400 is a flexible metal member, so as to bend and deform along with the bimetal 100 in the bending process of the bimetal 100, thereby preventing the bimetal 100 from bending and deforming when the temperature rises due to the adoption of a rigid metal member, and reducing the breaking capacity of the circuit breaker.
It should be understood that the ductile metallic member may be a metal elastic sheet capable of elastically deforming, such as a foil sheet, a copper sheet or an alloy sheet, or may be a braided wire formed by braiding a copper wire or a manganese-nickel alloy, and the ductile metallic member that can meet the use requirement is within the protection scope of the present invention; optionally, the embodiment of the utility model provides a ductile metallic member adopts the copper wire to weave and forms, has good electric conductive property, and can be along with bimetallic strip 100 bending deformation together.
In addition, both ends of the shunt member 400 may be respectively connected to both sides of the bimetal 100, that is, the first position and the second position are located at both sides of the bimetal 100; or, the both ends of reposition of redundant personnel piece 400 are connected in the same one side of bimetallic strip 100, and above-mentioned primary importance and second place lie in the same one side of bimetallic strip 100 promptly, and in the practical application, can require the requirement of adaptability regulation primary importance and second place according to the reposition of redundant personnel of reality, as long as can satisfy operation requirement's the mode of setting all belong to the utility model discloses in the protection range.
Moreover, the two ends of the shunt member 400 can be connected to the bimetallic strip 100 by welding, bolting or snapping, which is within the protection scope of the present invention as long as the connection method can meet the connection requirement; optionally, the embodiment of the present invention provides a shunt 400 welded on both sides of the bimetal strip 100, or welded on the same side of the bimetal strip 100, and the connection is firm, and the stability is better.
The end of the first flexible connector 200 away from the bimetal 100 is connected with a connection plate 500, and the connection plate 500 is used for communicating with an external load so as to communicate with an external current, so that the first flexible connector 200 can be conducted with the external current.
Furthermore, one end of the second flexible connecting member 300, which is far away from the bimetal strip 100, is connected with the movable contact 600, and the circuit breaker includes a fixed contact and a transmission mechanism for driving the movable contact 600 to move, so that the movable contact 600 is driven by the transmission mechanism to move, and the movable contact 600 and the fixed contact are connected or disconnected, thereby realizing the protection effect on the circuit through the circuit breaker.
Furthermore, the embodiment of the utility model provides a still disclose a circuit breaker, include as above circuit breaker overload release, consequently had all technological effects of above-mentioned circuit breaker overload release concurrently, this paper is no longer repeated here one by one.
And, the above-mentioned circuit breaker also includes the base, static contact and drive mechanism are set up on the base, in order to make the static contact keep the static state, when the bimetallic strip 100 of the above-mentioned overload release of circuit breaker takes place the bending deformation because of being heated, trigger the drive mechanism, make the drive mechanism drive the moving contact 600 movement of the overload release of circuit breaker, thus make moving contact 600 break contact with static contact, break circuit, play a protective role to the circuit.
Furthermore, the utility model also discloses a circuit protection system, include as above circuit breaker overload release, consequently had all technological effects of above-mentioned circuit breaker overload release concurrently, this paper is no longer repeated here one by one.
The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A circuit breaker overload release for a circuit breaker, the circuit breaker overload release comprising:
a bimetal;
the first soft connecting piece is connected with the bimetallic strip;
the second soft connecting piece is connected with the bimetallic strip; and
a flow divider;
wherein, first soft connecting piece with the hookup location of bimetallic strip is the primary importance, the second soft connecting piece with the hookup location of bimetallic strip is the second place, the primary importance with bimetallic strip between the two positions is the current-carrying portion, the primary importance with form first connecting portion between the first end of bimetallic strip, the second place with form the second connecting portion between the second end of bimetallic strip, the first end does bimetallic strip is close to the one end of primary importance, the second end does bimetallic strip is close to the one end of second place, the one end of reposition of redundant personnel piece connect in the primary importance or connect in first connecting portion, the other end of reposition of redundant personnel piece connect in the secondary importance or connect in the second connecting portion.
2. The circuit breaker overload trip apparatus of claim 1, wherein the shunt member is a ductile metallic member.
3. The overload trip apparatus of claim 1, wherein the shunt member is braided from copper wire.
4. The overload release for a circuit breaker according to claim 1, wherein both ends of the shunt member are welded to both sides of the bimetal, respectively, or both ends of the shunt member are welded to the same side of the bimetal.
5. The circuit breaker overload release of claim 1, wherein a connection plate is coupled to an end of the first flexible connector remote from the bimetal, the connection plate being configured to communicate with an external load.
6. The overload release of the circuit breaker according to claim 1, wherein a movable contact is connected to an end of the second flexible connecting member away from the bimetal, and the circuit breaker includes a fixed contact and a transmission mechanism for driving the movable contact to move, so that the movable contact is driven by the transmission mechanism to move, and the movable contact and the fixed contact are connected or disconnected.
7. A circuit breaker comprising a circuit breaker overload release according to any one of claims 1 to 6.
8. The circuit breaker of claim 7, further comprising a base, a fixed contact, and a transmission mechanism, wherein the fixed contact and the transmission mechanism are disposed on the base, and the transmission mechanism is configured to drive a movable contact of an overload release of the circuit breaker to move, so as to achieve conduction or disconnection between the movable contact and the fixed contact.
9. A circuit protection system comprising the circuit breaker overload trip of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222568028.8U CN218160236U (en) | 2022-09-26 | 2022-09-26 | Circuit breaker overload release, circuit breaker and circuit protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222568028.8U CN218160236U (en) | 2022-09-26 | 2022-09-26 | Circuit breaker overload release, circuit breaker and circuit protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218160236U true CN218160236U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222568028.8U Active CN218160236U (en) | 2022-09-26 | 2022-09-26 | Circuit breaker overload release, circuit breaker and circuit protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218160236U (en) |
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2022
- 2022-09-26 CN CN202222568028.8U patent/CN218160236U/en active Active
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