CN222637206U - Contact assembly of circuit breaker and circuit breaker - Google Patents
Contact assembly of circuit breaker and circuit breaker Download PDFInfo
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- CN222637206U CN222637206U CN202420463855.7U CN202420463855U CN222637206U CN 222637206 U CN222637206 U CN 222637206U CN 202420463855 U CN202420463855 U CN 202420463855U CN 222637206 U CN222637206 U CN 222637206U
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Abstract
本实用新型涉及低压电器技术领域，具体公开了一种断路器的触头组件及断路器。本实用新型提供的触头组件包括第一触头组，第一触头组的两个第一动触头通过短接排串联，提高了断路器高电压的分断能力；第一触头组和短接排均设置于基座内，保证了断路器在使用中的电气间隙和爬电距离，断路器不容易出现击穿，提高了断路器切断电流的性能，实现有效保护电路的目的；且短接排插接于基座内，实现了短接排的安装和固定，减少了零部件的使用量，短接排上设置连接部，连接部通过软连接线与第一动触头连接，在实现两个第一动触头串联的同时，不影响第一动触头动作，且减少了短接排的使用量，降低了成本。
The utility model relates to the technical field of low-voltage electrical appliances, and specifically discloses a contact assembly of a circuit breaker and a circuit breaker. The contact assembly provided by the utility model includes a first contact group, and two first moving contacts of the first contact group are connected in series through a short-circuit bar, which improves the high-voltage breaking capacity of the circuit breaker; the first contact group and the short-circuit bar are both arranged in a base, which ensures the electrical clearance and creepage distance of the circuit breaker in use, and the circuit breaker is not prone to breakdown, which improves the performance of the circuit breaker in cutting off the current and achieves the purpose of effectively protecting the circuit; and the short-circuit bar is plugged into the base, which realizes the installation and fixation of the short-circuit bar and reduces the use of parts. A connecting part is arranged on the short-circuit bar, and the connecting part is connected to the first moving contact through a soft connecting line. While realizing the series connection of the two first moving contacts, it does not affect the action of the first moving contact, and reduces the use of the short-circuit bar, thereby reducing the cost.
Description
Technical Field
The utility model relates to the technical field of piezoelectric devices, in particular to a contact assembly of a circuit breaker and the circuit breaker.
Background
With the gradual development of new energy industry markets and the more severe control of input cost of equipment by manufacturers of combiner boxes and inverter equipment, the cost of the equipment is expected to be reduced by increasing the system voltage. At present, the direct current voltage in the low-voltage field is gradually increased from DC1500V to DC3000V, and the rated voltage and breaking capacity of the corresponding direct current breaker are also improved. Therefore, the high-voltage direct-current circuit breaker will become a mainstream product of new energy industry in the future.
The biggest difference of AC/DC short circuit breaking is that the DC arc is not easy to extinguish, but the energy is small, the AC arc is easy to extinguish, but the energy is large. At present, the poles of the direct current breaker can be connected in series in a circuit, so that the direct current breaker is usually connected in series outside a plurality of break points in order to realize the short circuit breaking of high voltage and improve the rated working voltage. However, the external series connection structure has the phenomenon that the wiring copper bars are exposed, in actual use, the electric gap and the creepage distance are difficult to ensure, and the high-voltage direct current circuit breaker is easy to generate interphase breakdown or relatively breakdown, so that the circuit breaker loses the function of cutting off current, and the purpose of protecting a circuit is not achieved.
Disclosure of utility model
The utility model aims to provide a contact assembly of a circuit breaker and the circuit breaker, which improve the current cutting-off performance of the circuit breaker and realize the purpose of effectively protecting a circuit.
To achieve the purpose, the utility model adopts the following technical scheme:
In one aspect, a contact assembly for a circuit breaker is provided, comprising:
A base;
The first contact group is arranged in the base and comprises a first fixed contact, a second fixed contact and two first moving contacts, wherein the first fixed contact is connected with a first wiring terminal, and the second fixed contact is connected with a second wiring terminal;
The short circuit is arranged, the short circuit is arranged in the base in a plugging manner, two connecting portions are arranged at intervals on the short circuit, each connecting portion is connected with a soft connecting wire respectively, and the two soft connecting wires are connected with the corresponding first moving contacts respectively.
As an optional technical scheme of the contact assembly of the circuit breaker, the connecting part is convexly arranged at one edge of the short circuit row, at least two inserting grooves are formed in the base, the edge of the short circuit row, provided with the connecting part, is inserted into the inserting grooves, and the connecting part is arranged in the base.
As an optional technical scheme of the contact assembly of the circuit breaker, the short circuit row is convexly provided with a positioning groove in a concave manner at the edge of the connecting part, the base is provided with a positioning block, and the positioning block is inserted into the positioning groove.
As an alternative technical scheme of the contact assembly of the circuit breaker, a first baffle plate is arranged in the base, the first fixed contact and the second fixed contact are arranged on two sides of the first baffle plate, two first moving contacts are arranged on two sides of the first baffle plate, at least one inserting groove is respectively arranged on the base on two sides of the first baffle plate, inserting grooves are respectively concavely arranged on two sides of the first baffle plate, and a positioning block is formed between the two inserting grooves.
As an alternative technical scheme of the contact assembly of the circuit breaker, the second wiring terminal is opposite to the first wiring terminal, the second wiring terminal is connected with the second fixed contact through a switching row, and a second baffle plate is arranged in the base between the switching row and the short circuit row.
As an optional technical scheme of the contact assembly of the circuit breaker, the contact assembly of the circuit breaker further comprises a second contact group, the second contact group is arranged in the base, a third baffle plate is arranged in the base between the second contact group and the first contact group, the second contact group comprises a second moving contact and a third fixed contact, the third fixed contact is connected with a third connecting terminal, and the second moving contact is connected with a fourth connecting terminal.
As an optional technical solution of the contact assembly of the circuit breaker, the third fixed contact and the first fixed contact each include:
the first static contact body is in an S-shaped structure, and one end of the first static contact body is connected with the third wiring terminal or the first wiring terminal;
The connecting plate is connected with the other end of the first fixed contact body, the connecting plate and the first fixed contact body form a U-shaped structure, and a first fixed contact is arranged at the other end of the connecting plate;
One end of the first arc striking plate is connected with the first static contact, and the other end of the first arc striking plate is connected with the first static contact body in an insulating way;
The first magnetism increasing component is of a U-shaped structure, the first magnetism increasing component is arranged below the first fixed contact, and two ends of the first magnetism increasing component are flush with the first fixed contact.
As an optional technical solution of the contact assembly of the circuit breaker, the second stationary contact includes:
The second fixed contact body is in an S-shaped structure, one end of the second fixed contact body is connected with the second wiring terminal, and a second fixed contact is arranged at the other end of the second fixed contact body;
one end of the second arc striking plate is connected with the second stationary contact;
The second magnetism increasing component is of a U-shaped structure, the second magnetism increasing component is arranged below the second static contact, and two ends of the second magnetism increasing component are flush with the second static contact.
As an alternative technical scheme of the contact assembly of the circuit breaker, the second connecting terminal is opposite to the first connecting terminal, a part of the second static contact body is arranged below the first moving contact, a mounting groove penetrating through the base is formed in the base, a part of the second static contact body arranged below the first moving contact is arranged in the mounting groove, and an insulating cover is arranged on a bottom cover of the mounting groove.
In another aspect, a circuit breaker is provided, comprising a contact assembly of the circuit breaker of any one of the above.
The utility model has the beneficial effects that:
The contact assembly comprises a first contact group, wherein two first moving contacts of the first contact group are connected in series through a short circuit row, the breaking capacity of the high voltage of the circuit breaker is improved, the first contact group and the short circuit row are arranged in a base, the electric gap and the creepage distance of the circuit breaker in use are guaranteed, the circuit breaker is not easy to break down, the current cutting performance of the circuit breaker is improved, the purpose of effectively protecting a circuit is achieved, the short circuit row is inserted in the base, the installation and the fixation of the short circuit row are achieved, the use amount of parts is reduced, a connecting part is arranged on the short circuit row, the connecting part is connected with the first moving contacts through a soft connecting wire, the first moving contact action is not influenced when the series connection of the two first moving contacts is achieved, the use amount of the short circuit row is reduced, and the cost is reduced.
Drawings
FIG. 1 is a top view of one construction of a contact assembly provided by an embodiment of the present utility model;
fig. 2 is a top view of another configuration of a contact assembly provided by an embodiment of the present utility model;
fig. 3 is a schematic axial side structure of a shorting bar provided in an embodiment of the present utility model installed in a base;
fig. 4 is a schematic structural diagram of a shorting bar according to an embodiment of the present utility model;
Fig. 5 is a top view of a shorting bar provided by an embodiment of the present utility model mounted in a base;
FIG. 6 is a schematic view of a partial structure of a base according to an embodiment of the present utility model;
Fig. 7 is a schematic structural view of a contact assembly according to an embodiment of the present utility model in a separated state;
Fig. 8 is a schematic structural view of one structure of the contact assembly provided in an embodiment of the present utility model in a closed state;
Fig. 9 is a schematic structural view of another structure of a contact assembly provided in an embodiment of the present utility model in a separated state;
fig. 10 is a schematic structural view of another structure of a contact assembly provided in an embodiment of the present disclosure in a closed state;
Fig. 11 is a schematic structural diagram of a first fixed contact or a third fixed contact according to an embodiment of the present utility model;
fig. 12 is a schematic structural diagram of a second stationary contact according to an embodiment of the present utility model;
Fig. 13 is a schematic diagram of an installation structure of a second stationary contact according to an embodiment of the present utility model.
In the figure:
1. The device comprises a base, a first contact group, a first wiring terminal, a second wiring terminal, a short circuit row, a soft connecting wire, a switching row, a second contact group, a third wiring terminal, a fourth wiring terminal and a third wiring terminal, wherein the base, the first contact group, the first wiring terminal, the second wiring terminal, the short circuit row, the soft connecting wire, the switching row, the second contact group, the third wiring terminal and the fourth wiring terminal;
11. The device comprises a plug-in groove, 12, a positioning block, 13, a first baffle, 14, a second baffle, 15, a third baffle, 16, a mounting groove, 17 and an insulating cover;
21. The movable contact comprises a first movable contact, a first fixed contact body, a 222, a connecting plate, a 223, a first fixed contact, a 224, a first arc striking plate, a 225, a first magnetism increasing component, a 226, an insulating paper board, a 23, a second fixed contact, a 231, a second fixed contact body, a 232, a second fixed contact, a 233, a second arc striking plate, a 234, a second magnetism increasing component;
51. 52, a positioning groove;
81. The second moving contact, 82, the third stationary contact;
100. 200 parts of operating mechanism, release, 201 parts of magnetic yoke, 202 parts of armature, 203 parts of bimetal.
Detailed Description
In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
As shown in fig. 1 to 4, the present embodiment provides a contact assembly of a circuit breaker, which includes a base 1, a first contact group 2, and a shorting bar 5. The first contact group 2 is arranged in the base 1, the first contact group 2 comprises a first fixed contact 22, a second fixed contact 23 and two first movable contacts 21, the first fixed contact 22 is connected with a first wiring terminal 3, and the second fixed contact 23 is connected with a second wiring terminal 4. The short circuit row 5 is inserted in the base 1, two connecting portions 51 are arranged on the short circuit row 5 at intervals, each connecting portion 51 is connected with a soft connecting wire 6, and the two soft connecting wires 6 are connected with the corresponding first movable contact 21 respectively.
The contact assembly provided by the embodiment comprises a first contact group 2, wherein two first movable contacts 21 of the first contact group 2 are connected in series through a short circuit row 5, the breaking capacity of a high voltage of a circuit breaker is improved, the first contact group 2 and the short circuit row 5 are arranged in a base 1, the electric gap and the creepage distance of the circuit breaker in use are guaranteed, the circuit breaker is not easy to break down, the current cutting performance of the circuit breaker is improved, the purpose of an effective protection circuit is achieved, the short circuit row 5 is inserted in the base 1, the installation and fixation of the short circuit row 5 are achieved, the use amount of parts is reduced, a connecting part 51 is arranged on the short circuit row 5, the connecting part 51 is connected with the first movable contacts 21 through a soft connecting wire 6, the first movable contacts 21 are not influenced when the two first movable contacts 21 are connected in series, the use amount of the short circuit row 5 is reduced, and the cost is reduced.
In the actual use process, the current flows from the second wiring terminal 4 to the first wiring terminal 3 through the second fixed contact 23, the two first movable contacts 21 and the first fixed contact 22. The two first moving contacts 21 are respectively fixed in the base 1 through a rotating shaft piece, and the first moving contacts 21 can rotate relative to the base 1.
As shown in fig. 3 to 6, in some embodiments, the connecting portion 51 is convexly disposed at one edge of the shorting bar 5, at least two plugging slots 11 are disposed on the base 1, the edge of the shorting bar 5 with the connecting portion 51 is plugged into the plugging slots 11, and the connecting portion 51 is disposed in the base 1, so that the shorting bar 5 is convenient to install and fix, and the shorting bar 5 is ensured to be completely disposed in the base 1 and not to be exposed, so that the flexible connection wire 6 is convenient to connect, and the flexible connection wire 6 is disposed below the first moving contact 21 without affecting the action of the first moving contact 21.
The edge concave of the connecting portion 51 is arranged on the short circuit row 5 in a protruding mode, the positioning groove 52 is formed in the edge concave of the connecting portion 51, the positioning block 12 is arranged on the base 1, the positioning block 12 is inserted into the positioning groove 52, the positioning function is achieved on the installation position of the short circuit row 5, the short circuit row 5 is convenient to install rapidly, and the fixing function is achieved on the short circuit row 5.
Further alternatively, the two connecting portions 51 are symmetrically arranged with respect to the positioning groove 52, the positioning groove 52 is arranged at the middle position of the shorting bar 5, and the shorting bar 5 can be mounted on the base 1 even when rotated 180 ° around the vertical axis.
The base 1 is internally provided with the first separation baffle 13, the first fixed contact 22 and the second fixed contact 23 are arranged on two sides of the first separation baffle 13, the two first movable contacts 21 are arranged on two sides of the first separation baffle 13, the first separation baffle 13 plays a role in isolating adjacent phases of the circuit breaker, the electric gap and the creepage distance of the circuit breaker are increased in the using process of the circuit breaker, interphase breakdown is not easy to occur for the high-voltage direct current circuit breaker, the current cutting performance of the circuit breaker is improved, and the purpose of protecting a circuit is achieved. At least one inserting groove 11 is respectively arranged on the base 1 at two sides of the first baffle 13 so as to stably fix the short circuit row 5. The two sides of the first separation baffle 13 are respectively concavely provided with a plugging groove 11, a positioning block 12 is formed between the two plugging grooves 11, the edge of the shorting bar 5 is plugged in the plugging groove 11, the positioning block 12 is plugged in the positioning groove 52, and the shorting bar 5 spans the first separation baffle 13 to be connected with two first movable contacts 21 on the premise of ensuring that the first separation baffle 13 effectively isolates adjacent phases, meanwhile, the shorting bar 5 is plugged with the first separation baffle 13, and the fixed shorting bar 5 is realized.
The base 1 on two sides of the first baffle 13 is internally provided with plug blocks, the plug blocks are provided with plug grooves 11, and the two plug blocks are symmetrically arranged relative to the first baffle 13 so as to be convenient to be installed and fixed on the base 1 under the condition that the shorting bar 5 rotates 180 degrees around the vertical axis.
Referring to fig. 3, 7 and 9, in some embodiments, since the first connection terminal 3 is connected to the first fixed contact 22, the second connection terminal 4 is connected to the second fixed contact 23, the first fixed contact 22 and the second fixed contact 23 are spaced apart, in order to reduce the size of the circuit breaker in the width direction, the second connection terminal 4 is disposed opposite to the first connection terminal 3, and the second connection terminal 4 is connected to the second fixed contact 23 through the switching bar 7. The second baffle 14 is arranged in the base 1 between the switching row 7 and the short circuit row 5, the switching row 7 and the short circuit row 5 are isolated by the second baffle 14, short circuits of the switching row 7 and the short circuit row 5 are avoided under high voltage, and normal operation of the circuit breaker is guaranteed.
The transfer row 7 is connected with the second fixed contact 23 through bolts. The switching row 7 extends along the direction of arranging of first stationary contact 22 and second stationary contact 23, and the one end of switching row 7 is connected with first connecting plate perpendicularly, and the other end of switching row 7 is connected with the second connecting plate perpendicularly, and the second connecting plate sets up at the width direction interval of switching row 7 with first connecting plate, and first connecting plate is connected with second binding post 4, and the second connecting plate is connected with second stationary contact 23.
Referring to fig. 1 to 3, the contact assembly of the circuit breaker further includes a second contact group 8, the second contact group 8 is disposed in the base 1, and a third baffle 15 is disposed in the base 1 between the second contact group 8 and the first contact group 2, the second contact group 8 includes a second moving contact 81 and a third fixed contact 82, the third fixed contact 82 is connected with a third connection terminal 9, and the second moving contact 81 is connected with a fourth connection terminal 10. An external load is connected between the fourth wiring terminal 10 and the second wiring terminal 4, and after the breaker is closed, current flows to the fourth wiring terminal 10 from the third wiring terminal 9, and then flows to the second wiring terminal 4 and the first wiring terminal 3 after passing through the load, so that a loop is formed. And when the second connecting terminal 4 flows to the first connecting terminal 3, the current in the second fixed contact 23 flows to the opposite direction to the current in the first moving contact 21 corresponding to the second fixed contact 23, so that the first moving contact 21 is easy to repel.
The first, second and third fixed contacts 22, 23, 82 are disposed side-by-side, and in some embodiments, the first fixed contact 22 is disposed between the third and second fixed contacts 82, 23, the first terminal 3 is disposed proximate the third terminal 9, and the second terminal 4 is disposed proximate the fourth terminal 10. Fig. 7 is a schematic structural view of a structure of the contact assembly provided in this embodiment in a switching-off state, and fig. 8 is a schematic structural view of a structure of the contact assembly provided in this embodiment in a switching-on state.
In other embodiments, the second fixed contact 23 is disposed between the first fixed contact 22 and the third fixed contact 82, the first connection terminal 3 is disposed at a distance from the third connection terminal 9, and the second connection terminal 4 is disposed at a distance from the fourth connection terminal 10, so as to increase the creepage distance and the electrical clearance between the incoming line and the outgoing line. Fig. 9 is a schematic structural view of another structure of the contact assembly provided in the present embodiment in a switching-off state, and fig. 10 is a schematic structural view of another structure of the contact assembly provided in the present embodiment in a switching-on state.
In some embodiments, as shown in fig. 11, the third stationary contact 82 and the first stationary contact 22 each include a first stationary contact body 221, a link plate 222, a first striking plate 224, and a first magnetism increasing assembly 225.
The first fixed contact body 221 is in an S-shaped structure, and one end of the first fixed contact body 221 is connected with the third wiring terminal 9 or the first wiring terminal 3. One end of the connecting plate 222 is connected with the other end of the first fixed contact body 221, the connecting plate 222 and the first fixed contact body 221 form a U-shaped structure, and the other end of the connecting plate 222 is provided with a first fixed contact 223. Optionally, the connecting plate 222 is formed by bending the other end of the first fixed contact body 221, so that the material consumption is reduced, and the direction of the current flowing by the connecting plate 222 is opposite to the direction of the current flowing on the first fixed contact body 221, so that the electric repulsive force of the first movable contact 21 is improved, the transfer of the electric arc at the first fixed contact 223 is accelerated, and the burning loss of the electric arc to the first fixed contact 223 is reduced.
One end of the first striking plate 224 is connected to the first stationary contact 223, and alternatively, the first striking plate 224 is connected to the first stationary contact 223 by welding. The other end of the first striking plate 224 is connected with the first fixed contact body 221 in an insulating way, so that the first striking plate 224 and the first fixed contact body 221 are prevented from breakdown, and the coupling plate 222 loses the magnetism increasing function. The first striking plate 224 is a ferromagnetic material piece or a pure copper material piece. Optionally, an insulating paper board 226 is disposed on the first static contact body 221, and the first striking plate 224 is connected with the insulating paper board 226.
The first magnetism increasing component 225 is in a U-shaped structure, the first magnetism increasing component 225 is arranged below the first static contact 223, the first static contact 223 is arranged in the U-shaped space of the first magnetism increasing component 225, and two ends of the first magnetism increasing component 225 are flush with the first static contact 223. The first magnetism increasing component 225 is disposed in the U-shaped space enclosed by the connecting plate 222 and the first stationary contact body 221. The first magnetism increasing component 225 can enhance the magnetic field at the first fixed contact 223 in the breaking process of the circuit breaker, so that the electric repulsive force to the first moving contact 21 is improved, the transfer of the electric arc at the first fixed contact 223 is accelerated, and the burning loss of the electric arc to the first fixed contact 223 is reduced. Optionally, the first magnetism increasing component 225 includes a plurality of U-shaped magnetism increasing plates, and the plurality of magnetism increasing plates are connected by riveting.
In some embodiments, as shown in fig. 12, the second stationary contact 23 includes a second stationary contact body 231, a second striking plate 233, and a second magnetism increasing assembly 234.
The second stationary contact body 231 is S-shaped, one end of the second stationary contact body 231 is connected with the second connecting terminal 4, and the other end of the second stationary contact body 231 is provided with a second stationary contact 232. One end of the second striking plate 233 is connected to the second stationary contact 232. The current flow direction in the second fixed contact body 231 is opposite to the current flow direction in the first movable contact 21 corresponding to the second fixed contact body 231, so that the first movable contact 21 is repelled. The second magnetism increasing component 234 is of a U-shaped structure, the second magnetism increasing component 234 is arranged below the second fixed contact 232, the second fixed contact 232 is arranged in the U-shaped space of the second magnetism increasing component 234, and two ends of the second magnetism increasing component 234 are flush with the second fixed contact 232. The second magnetism increasing component 234 can enhance the magnetic field at the second fixed contact 232 in the breaking process of the circuit breaker, so that the electric repulsive force to the first movable contact 21 is improved, the transfer of the electric arc at the second fixed contact 232 is accelerated, and the burning loss of the electric arc to the second fixed contact 232 is reduced. Optionally, the second magnetism increasing assembly 234 includes a plurality of U-shaped magnetism increasing plates connected by riveting.
Alternatively, as shown in fig. 13, the second connection terminal 4 is disposed opposite to the first connection terminal 3, a portion of the second fixed contact body 231 is disposed below the first moving contact 21, a mounting groove 16 penetrating through the base 1 is provided on the base 1, a portion of the second fixed contact body 231 disposed below the first moving contact 21 is disposed in the mounting groove 16 to position and mount the second fixed contact 23, and an insulating cover 17 is disposed on a bottom cover of the mounting groove 16 to insulate and isolate the second fixed contact 23 from other components.
The embodiment also provides a circuit breaker, which is a direct current circuit breaker. The circuit breaker comprises the contact assembly of the circuit breaker, and the circuit breaker is particularly a direct current circuit breaker with three-stage appearance and two-stage series connection inside, and is suitable for breaking under high voltage.
Referring to fig. 4 and 10, the circuit breaker further includes a trip unit 200 and an operating mechanism 100, and the trip unit 200 may be a thermo-magnetic trip unit. The first contact group 2 is correspondingly provided with the release 200, the release 200 is connected with the shorting bar 5, and the two stages share one release 200, so that the effect of a protection circuit is achieved, the number of parts is reduced, and the cost is saved. The trip unit 200 enables the operating mechanism 100 to perform a trip operation, thereby breaking the circuit breaker. The second contact group 8 is correspondingly provided with a release 200.
The trip 200 includes a magnetic trip unit and a thermal trip unit, wherein a yoke 201 of the magnetic trip unit is connected with the shorting bar 5, and a bimetal 203 of the thermal trip unit is connected with the shorting bar 5. When the short circuit current is relatively large, the magnetized magnetic yoke 201 can generate enough electromagnetic attraction force to attract the armature 202, the armature 202 rotates until one end of the armature 202 contacts with the magnetic yoke 201, and the other end of the armature 202 hits the traction rod of the operating mechanism 100, so that the operating mechanism 100 performs tripping action. Under the condition that the rated current is higher than the rated current, the shorting bar 5 generates higher temperature at the position where the bimetal 203 is connected so that the bimetal 203 is subjected to larger bending deformation, and the other end of the bimetal 203 pushes the traction rod of the operating mechanism 100, so that the operating mechanism 100 executes tripping action.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. A contact assembly for a circuit breaker, comprising:
A base (1);
The first contact group (2) is arranged in the base (1), the first contact group (2) comprises a first fixed contact (22), a second fixed contact (23) and two first moving contacts (21), the first fixed contact (22) is connected with a first wiring terminal (3), and the second fixed contact (23) is connected with a second wiring terminal (4);
The short circuit is arranged (5), short circuit is arranged (5) peg graft in base (1), the interval is equipped with two connecting portion (51) on short circuit is arranged (5), every connecting portion (51) are connected with flexible connecting wire (6) respectively, two flexible connecting wire (6) respectively with corresponding first moving contact (21) are connected.
2. The contact assembly of the circuit breaker according to claim 1, characterized in that the connecting portion (51) is convexly arranged at one edge of the shorting bar (5), at least two plugging grooves (11) are arranged on the base (1), the edge of the shorting bar (5) provided with the connecting portion (51) is plugged in the plugging grooves (11), and the connecting portion (51) is arranged in the base (1).
3. The contact assembly of the circuit breaker according to claim 2, wherein the edge of the short circuit row (5) convexly provided with the connecting part (51) is concavely provided with a positioning groove (52), the base (1) is provided with a positioning block (12), and the positioning block (12) is inserted into the positioning groove (52).
4. A contact assembly of a circuit breaker according to claim 3, wherein a first baffle (13) is arranged in the base (1), the first fixed contact (22) and the second fixed contact (23) are arranged on two sides of the first baffle (13), two first moving contacts (21) are arranged on two sides of the first baffle (13), at least one plugging slot (11) is respectively arranged on the base (1) on two sides of the first baffle (13), the plugging slots (11) are respectively concavely arranged on two sides of the first baffle (13), and the positioning block (12) is formed between the two plugging slots (11).
5. The contact assembly of the circuit breaker according to claim 1, characterized in that the second connecting terminal (4) is arranged opposite to the first connecting terminal (3), the second connecting terminal (4) is connected with the second fixed contact (23) through a switching bar (7), and a second baffle (14) is arranged in the base (1) between the switching bar (7) and the shorting bar (5).
6. The contact assembly of the circuit breaker according to claim 1, characterized in that the contact assembly of the circuit breaker further comprises a second contact group (8), the second contact group (8) is arranged in the base (1), a third baffle (15) is arranged in the base (1) between the second contact group (8) and the first contact group (2), the second contact group (8) comprises a second moving contact (81) and a third fixed contact (82), the third fixed contact (82) is connected with a third connecting terminal (9), and the second moving contact (81) is connected with a fourth connecting terminal (10).
7. The contact assembly of claim 6, wherein the third stationary contact (82) and the first stationary contact (22) each comprise:
the first static contact body (221) is of an S-shaped structure, and one end of the first static contact body (221) is connected with the third wiring terminal (9) or the first wiring terminal (3);
The connecting plate (222), one end of the connecting plate (222) is connected with the other end of the first fixed contact body (221), the connecting plate (222) and the first fixed contact body (221) form a U-shaped structure, and a first fixed contact (223) is arranged at the other end of the connecting plate (222);
A first striking plate (224), wherein one end of the first striking plate (224) is connected with the first stationary contact (223), and the other end of the first striking plate (224) is connected with the first stationary contact body (221) in an insulating manner;
The first magnetism increasing component (225) is of a U-shaped structure, the first magnetism increasing component (225) is arranged below the first stationary contact (223), and two ends of the first magnetism increasing component (225) are flush with the first stationary contact (223).
8. The contact assembly of the circuit breaker according to claim 1, characterized in that said second stationary contact (23) comprises:
The second fixed contact body (231) is of an S-shaped structure, one end of the second fixed contact body (231) is connected with the second wiring terminal (4), and a second fixed contact (232) is arranged at the other end of the second fixed contact body (231);
A second striking plate (233), wherein one end of the second striking plate (233) is connected with the second stationary contact (232);
The second magnetism increasing component (234) is of a U-shaped structure, the second magnetism increasing component (234) is arranged below the second fixed contact (232), and two ends of the second magnetism increasing component (234) are flush with the second fixed contact (232).
9. The contact assembly of the circuit breaker according to claim 8, wherein the second connection terminal (4) is disposed opposite to the first connection terminal (3), a portion of the second stationary contact body (231) is disposed below the first moving contact (21), a mounting groove (16) penetrating through the base (1) is formed in the base (1), a portion of the second stationary contact body (231) disposed below the first moving contact (21) is disposed in the mounting groove (16), and an insulating cover (17) is disposed on a bottom cover of the mounting groove (16).
10. Circuit breaker, characterized in that it comprises a contact assembly of the circuit breaker according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420463855.7U CN222637206U (en) | 2024-03-11 | 2024-03-11 | Contact assembly of circuit breaker and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420463855.7U CN222637206U (en) | 2024-03-11 | 2024-03-11 | Contact assembly of circuit breaker and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222637206U true CN222637206U (en) | 2025-03-18 |
Family
ID=94933861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420463855.7U Active CN222637206U (en) | 2024-03-11 | 2024-03-11 | Contact assembly of circuit breaker and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222637206U (en) |
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2024
- 2024-03-11 CN CN202420463855.7U patent/CN222637206U/en active Active
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