Circuit breaker instantaneous test tool

Abstract

The utility model relates to the technical field of circuit breaker instantaneous testing, in particular to a circuit breaker instantaneous testing tool. The circuit breaker instantaneous test tool comprises a positioning piece and a limiting piece. Wherein one side of the positioning piece is convexly provided with a positioning part, and the positioning part is configured to be inserted on a bracket of the circuit breaker. The limiting piece is connected with the positioning piece, the limiting piece is located on the side, facing the circuit breaker, of the positioning piece, and the limiting piece is configured to limit rotation of a re-buckle in the circuit breaker, so that the re-buckle limits rotation of the lock catch, the lock catch limits rotation of the jump buckle, and the jump buckle limits rotation of the moving contact. The instantaneous testing tool for the circuit breaker can prevent the moving contact from being separated from the static contact in the testing process, so that electric arc cannot be generated, the protection effect on the moving contact and the static contact is improved, the service life is prolonged, and the cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of instantaneous testing technology for circuit breakers, and in particular to a tooling for instantaneous testing of circuit breakers. Background Technology

[0002] Currently, before molded case circuit breakers are manufactured and released to the market, manufacturers generally perform instantaneous characteristic calibration procedures. A significant step in this process is applying a relatively high tripping current to the circuit breaker. This high current is intended to trigger the product's tripping mechanism, causing the mechanical components to unlock, the latch to trip, and the moving and stationary contacts to separate rapidly. However, it is precisely at the instant of contact separation that an electric arc occurs, a physical process that poses multiple challenges to the circuit breaker's performance.

[0003] Specifically, the formation of an electric arc not only directly erodes the silver contact points on the moving and stationary contacts, reducing their service life, but also adversely affects the overall circuit resistance of the product, increasing losses during power transmission. Furthermore, the localized high temperatures caused by the arc further affect the circuit breaker's temperature rise performance, potentially leading to a decrease in its thermal stability. More critically, the arcing phenomenon can also interfere with the circuit breaker's time-delay operating characteristics, causing it to operate prematurely or too late under conditions outside of design specifications, thereby affecting the stability and safety of the power system. In summary, the arcing problem generated during instantaneous calibration in existing technologies is one of the key factors restricting the performance improvement and long-term reliable operation of molded case circuit breakers.

[0004] Therefore, there is an urgent need to design a circuit breaker instantaneous testing fixture to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a circuit breaker instantaneous testing fixture that can prevent the moving contact and stationary contact from separating during the test, thereby preventing the generation of an electric arc and improving the protection of the moving contact and stationary contact.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a circuit breaker instantaneous testing fixture, comprising:

[0008] A positioning component, wherein a positioning part protrudes from one side of the positioning component, and the positioning part is configured to be inserted into the bracket of the circuit breaker;

[0009] A limiting member is detachably connected to the positioning member, the limiting member is located on the side of the positioning member facing the circuit breaker, and the limiting member is configured to restrict the re-clamping rotation in the circuit breaker.

[0010] As an optional technical solution for a circuit breaker instantaneous testing fixture, the positioning member is recessed with a positioning groove, and the limiting member includes a connecting part and a limiting part that are connected to each other. The connecting part is embedded in the positioning groove, and the limiting part is placed outside the positioning groove and is used to limit the re-clamping rotation in the circuit breaker.

[0011] As an optional technical solution for a circuit breaker instantaneous testing fixture, the positioning groove is polygonal.

[0012] As an optional technical solution for a circuit breaker instantaneous testing fixture, the end of the limiting part away from the connecting part is provided with a chamfer or rounded corner.

[0013] As an optional technical solution for a circuit breaker instantaneous testing fixture, the limiting part includes a first bending part and a second bending part that are perpendicularly connected to each other. The end of the first bending part away from the second bending part is connected to the connecting part, and the second bending part extends toward the bracket side close to the circuit breaker.

[0014] As an optional technical solution for a circuit breaker instantaneous testing fixture, the bottom wall of the positioning groove is provided with a first mounting hole, the connecting part is provided with a second mounting hole, and the circuit breaker instantaneous testing fixture also includes a connector, one end of which passes through the first mounting hole and is detachably connected to the second mounting hole.

[0015] As an optional technical solution for a circuit breaker instantaneous testing fixture, the circuit breaker instantaneous testing fixture also includes a handle, on which a third mounting hole is provided, and the handle is detachably connected to the end of the connector opposite to the limiting member through the third mounting hole.

[0016] As an optional technical solution for a circuit breaker instantaneous testing fixture, the circuit breaker instantaneous testing fixture also includes a handle, one end of which is rotatably connected to one side of the positioning member, and the other end of which is rotatably connected to the other side of the positioning member.

[0017] As an optional technical solution for a circuit breaker instantaneous testing fixture, the positioning part includes a first positioning part and a second positioning part connected to each other. The first positioning part is connected to the positioning member. The first positioning part extends along a first direction, and the second positioning part extends along a second direction. The first direction and the second direction are perpendicular to each other.

[0018] The bracket has a first end face and a second end face that are perpendicular to each other. The first positioning part is configured to abut against the first end face, and the second positioning part is configured to abut against the second end face.

[0019] As an optional technical solution for a circuit breaker instantaneous testing fixture, both the positioning component and the limiting component are non-magnetic components.

[0020] As an optional technical solution for a circuit breaker instantaneous testing fixture, both the positioning component and the limiting component are made of aluminum or stainless steel.

[0021] The beneficial effects of this utility model include at least the following:

[0022] This utility model provides a circuit breaker instantaneous testing fixture, which includes a positioning component and a limiting component. The positioning component has a protruding positioning part on one side, configured to insert into the circuit breaker's bracket. The limiting component is connected to the positioning component. When the positioning component is inserted into the circuit breaker's bracket, the limiting component is configured to restrict the rotation of the re-clamp in the circuit breaker, thereby restricting the rotation of the locking latch, restricting the rotation of the trip latch, and restricting the rotation of the moving contact.

[0023] In this circuit breaker instantaneous test fixture, the positioning component is inserted into the bracket within the circuit breaker. The positioning part cooperates with the bracket to achieve the positioning function of the positioning component, avoiding or reducing displacement phenomena such as shaking of the instantaneous test fixture during use. During instantaneous testing of the circuit breaker, the operator inserts the instantaneous test fixture into the bracket and applies a tripping current to the circuit breaker. At this time, the traction rod in the circuit breaker rotates counterclockwise, preventing it from engaging with the re-clamp. In other words, the traction rod and the re-clamp have already disengaged. Under the action of external force, the tripping clip in the circuit breaker experiences a counterclockwise torque, the locking clip experiences a clockwise torque, and the re-clamp experiences a counterclockwise torque. Due to the limiting component in this invention, the limiting component can limit the re-clamp subjected to the counterclockwise torque, thus preventing the re-clamp from rotating. Therefore, although the pull rod and the re-clamp have disengaged at this moment, the re-clamp is stopped by the limiting component after a slight rotation and cannot continue to rotate. This prevents the re-clamp and the locking latch from disengaging, and the locking latch and the trip latch also remain in their original positions without disengaging. In other words, although the circuit breaker experiences a momentary tripping phenomenon, the locking latch and the trip latch within the circuit breaker do not disengage. Consequently, the moving and stationary contacts do not separate, preventing arcing and damage to the circuit breaker. This improves the protection of the moving and stationary contacts and saves costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1This is a schematic diagram of the instantaneous testing fixture for circuit breakers provided in Embodiment 1 of this utility model;

[0026] Figure 2 The explosion of the instantaneous test fixture for circuit breakers provided in Embodiment 1 of this utility model. Figure 1 ;

[0027] Figure 3 The explosion of the instantaneous test fixture for circuit breakers provided in Embodiment 1 of this utility model. Figure 2 ;

[0028] Figure 4 This is a cross-sectional view of the instantaneous test fixture for circuit breakers provided in Embodiment 1 of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the instantaneous test fixture for the circuit breaker provided in Embodiment 1 of this utility model, which is inserted into the circuit breaker.

[0030] Figure 6 This is a cross-sectional view of the instantaneous circuit breaker testing fixture provided in Embodiment 1 of this utility model inserted into the circuit breaker (without tripping current).

[0031] Figure 7 yes Figure 6 A magnified view of a section at point A in the middle;

[0032] Figure 8 This is a cross-sectional view of the instantaneous circuit breaker testing fixture provided in Embodiment 1 of this utility model inserted into the circuit breaker (with tripping current already applied);

[0033] Figure 9 yes Figure 8 A magnified view of a section at point B in the middle;

[0034] Figure 10 A schematic diagram of the instantaneous test fixture for circuit breakers provided in Embodiment 2 of this utility model;

[0035] Figure 11 This is a schematic diagram of the structure of the instantaneous test fixture for the circuit breaker provided in Embodiment 3 of this utility model, which is inserted into the circuit breaker.

[0036] Figure 12 This is a cross-sectional view of the circuit breaker instantaneous testing fixture provided in Embodiment 3 of this utility model inserted into the circuit breaker;

[0037] Figure 13 This is a schematic diagram of the instantaneous testing fixture for circuit breakers provided in Embodiment 3 of this utility model;

[0038] Figure 14 This is a schematic diagram of the structure of the instantaneous test fixture for the circuit breaker provided in Embodiment 4 of this utility model, which is inserted into the circuit breaker.

[0039] Figure 15 This is a cross-sectional view of the circuit breaker instantaneous testing fixture provided in Embodiment 4 of this utility model inserted into the circuit breaker;

[0040] Figure 16 This is a schematic diagram of the instantaneous test fixture for circuit breakers provided in Embodiment 4 of this utility model.

[0041] Figure Labels

[0042] 1. Instantaneous testing fixture for circuit breakers;

[0043] 10. Positioning component; 11. First positioning part; 12. Second positioning part; 13. Positioning groove; 131. First mounting hole; 20. Limiting component; 21. Connecting part; 211. Second mounting hole; 22. Limiting part; 221. Chamfer; 222. First bending part; 223. Second bending part; 30. Connecting component; 40. Handle; 41. Third mounting hole;

[0044] 100. Circuit breaker; 110. Traction rod; 120. Re-clamp; 1201. First re-clamp; 1202. Second re-clamp; 130. Locking latch; 140. Tripping latch; 150. Moving contact; 160. Stationary contact; 170. Gap. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0052] Example 1

[0053] This embodiment provides a circuit breaker instantaneous testing fixture that can prevent the moving contact and stationary contact from separating during the test, thereby preventing the generation of an electric arc and improving the protection of the moving contact and stationary contact.

[0054] like Figures 1-9As shown, the instantaneous test fixture 1 for the circuit breaker includes a positioning member 10 and a limiting member 20. The positioning member 10 has a protruding positioning portion on one side, configured to be inserted into the bracket of the circuit breaker 100. The limiting member 20 is connected to the positioning member 10 and is located on the side of the positioning member 10 facing the circuit breaker 100. When the positioning member 10 is inserted into the bracket of the circuit breaker 100, the limiting member 20 is configured to restrict the rotation of the re-clamp 120 in the circuit breaker 100, so that the re-clamp 120 restricts the rotation of the locking latch 130, the locking latch 130 restricts the rotation of the trip latch 140, and the trip latch 140 restricts the rotation of the moving contact 150.

[0055] like Figure 6 As shown, the circuit breaker 100 includes a traction rod 110, a re-clamp 120, a latch 130, a trip latch 140, a moving contact 150, and a stationary contact 160. When the circuit breaker 100 has not tripped, the traction rod 110 and the re-clamp 120 form a primary transmission structure; the re-clamp 120 and the latch 130 form a secondary transmission structure; and the latch 130 and the trip latch 140 form a final transmission structure. The moving contact 150 and the trip latch 140 are connected, and the contact point of the moving contact 150 is in contact with the contact point of the stationary contact 160. It is understood that this arrangement is intended to clearly show that the re-clamp 120 participates in both the primary and secondary transmission structures, and that the latch 130 participates in both the secondary and final transmission structures. Figure 6 The numbers 120 and 130 were marked twice.

[0056] Based on the above design, in this embodiment, the positioning member 10 of the circuit breaker instantaneous test fixture 1 is inserted into the bracket in the circuit breaker 100. The positioning part can cooperate with the bracket to achieve the positioning function of the positioning member 10, thereby avoiding or reducing the displacement phenomenon such as shaking of the circuit breaker instantaneous test fixture 1 during use. When the circuit breaker instantaneous test fixture 1 is inserted into the bracket, the limiting member 20 can be located in the primary transmission structure of the circuit breaker 100 or in the secondary transmission structure.

[0057] The following explanation uses the example of the limiting component 20 located in the secondary transmission structure. Figures 6-7 As shown, there is a certain gap 170 between the limiting member 20 and the re-clamp 120 at this time. When the operator applies a relatively high tripping current to the circuit breaker 100, the traction rod 110 in the circuit breaker 100 then... Figure 6When the circuit breaker rotates counterclockwise, the traction rod 110 cannot engage with the re-clamp 120; in other words, the primary transmission structure has disengaged. The trip latch 140 in the circuit breaker 100 is subjected to a counterclockwise torque by the mechanism spring (not shown), the locking latch 130 is subjected to a clockwise torque, and the re-clamp 120 is subjected to a counterclockwise torque. Due to the limiting member 20 in this embodiment, the limiting member 20 can limit the re-clamp 120 subjected to the counterclockwise torque, thus preventing the re-clamp 120 from rotating. Therefore, although the primary transmission structure has disengaged, the re-clamp 120, after a slight rotation, is stopped by the limiting member 20 and cannot continue to rotate. Consequently, the secondary transmission structure remains unchanged and has not disengaged, and the final transmission structure also remains unchanged and has not disengaged. In other words, although the circuit breaker 100 experienced a momentary tripping phenomenon, the final drive structure in the circuit breaker 100 did not trip, thus preventing the moving contact 150 and the stationary contact 160 from separating. This prevents arcing damage to the circuit breaker 100, improves the protection of the moving contact 150 and the stationary contact 160, and saves costs.

[0058] In this embodiment, the instantaneous test fixture 1 for the circuit breaker only restricts the tripping of the final drive structure (i.e., restricts the separation of tripping latch 140 and latch 130), but does not restrict the separation and tripping of the remaining drive structures. Thus, during the instantaneous test, when the remaining drive structures have instantaneously tripped under the tripping current, but the final drive structure of the product has not tripped (i.e., the product's tripping latch 140 and latch 130 are still in the overlapping position), the product as a whole has not tripped, the moving contact 150 and the stationary contact 160 have not separated, and therefore no arcing will occur to erode the silver points.

[0059] Please refer to Figures 5-9 When the instantaneous test fixture 1 is inserted into the bracket of the circuit breaker 100, and no instantaneous test is being performed at this time, there is a certain gap 170 between the limiting member 20 and the re-clamp 120. This facilitates the insertion of the instantaneous test fixture 1 and improves work efficiency. When the primary transmission structure trips, the re-clamp 120 is rotated by a counterclockwise torque, eliminating the gap 170 and finally abutting against the limiting member 20. At this time, the limiting member 20 limits the re-clamp 120, preventing the limiting member 20 from continuing to rotate.

[0060] In this embodiment, the limiting member 20 and the positioning member 10 are detachably connected. This allows the limiting member 20 to wear down to a certain extent after long-term use. At this time, the operator can remove the limiting member 20 for individual replacement, saving costs and extending the service life of the instantaneous test fixture 1 for the circuit breaker.

[0061] Understandably, after the circuit breaker 100 instantaneous test is completed, the operator can determine the pass rate of the entire product instantaneous test by observing the tripping status of the primary transmission structure, or by pulling out the circuit breaker instantaneous test fixture 1 to observe whether the final transmission structure of the product trips.

[0062] like Figures 1-4 As shown, in this embodiment, the positioning member 10 is recessed with a positioning groove 13, and the limiting member 20 includes a connecting part 21 and a limiting part 22 that are connected to each other. The connecting part 21 is embedded in the positioning groove 13, and the limiting part 22 is placed outside the positioning groove 13 and is used to limit the rotation of the re-clamp 120 in the circuit breaker 100.

[0063] By setting the positioning groove 13 and the connecting part 21, the positioning groove 13 can limit the limiting member 20, so as to prevent the limiting member 20 from shaking or displacing during use, thereby improving the stability and reliability of the limiting member 20.

[0064] Optionally, in this embodiment, the connecting part 21 and the limiting part 22 are integrally formed to improve the strength of the limiting part 20 and extend its service life.

[0065] Optionally, in this embodiment, the positioning groove 13 is polygonal, and the shape of the connecting part 21 matches the shape of the positioning groove 13, so as to avoid the phenomenon of the limiting member 20 rotating during use.

[0066] Optionally, the limiting part 22 in this embodiment may be coated with a protective coating, such as grease, to reduce wear and extend service life.

[0067] Optionally, in this embodiment, the end of the limiting part 22 facing away from the connecting part 21 is provided with a chamfer 221 or a rounded corner. This facilitates the insertion of the limiting part 22 into the secondary transmission structure, improves the insertion efficiency of the limiting part 22, reduces or avoids interference between the limiting part 22 and other components in the circuit breaker 100, and improves working efficiency.

[0068] like Figures 1-4 As shown, in this embodiment, the bottom wall of the positioning groove 13 is provided with a first mounting hole 131, and the connecting part 21 is provided with a second mounting hole 211. The circuit breaker instantaneous testing fixture 1 also includes a connector 30, one end of which passes through the first mounting hole 131 and is detachably connected to the second mounting hole 211. The connector 30 enables the detachable connection between the positioning part 10 and the limiting part 20, facilitating the replacement of the limiting part 20.

[0069] For example, the connector 30 in this embodiment can be configured as a stud with an external thread and the second mounting hole 211 with an internal thread, and the stud is threadedly connected to the second mounting hole 211.

[0070] Furthermore, the circuit breaker instantaneous testing fixture 1 in this embodiment also includes a handle 40, which has a third mounting hole 41. The handle 40 is detachably connected to the end of the connector 30 away from the limiting member 20 through the third mounting hole 41. For example, the third mounting hole 41 has an internal thread, thereby enabling a detachable connection between the stud and the handle 40, facilitating future replacement and maintenance of the handle 40. The handle 40 facilitates the operator's insertion, removal, and lifting of the circuit breaker instantaneous testing fixture 1, improving work efficiency.

[0071] like Figure 3 As shown, in this embodiment, the positioning part includes a first positioning part 11 and a second positioning part 12 connected to each other. The first positioning part 11 is connected to the positioning member 10, and the first positioning part 11 is positioned along a first direction ( Figure 3 The second positioning part 12 extends along the second direction (X-axis direction). Figure 3 Extending along the Y-axis direction, the first direction and the second direction are perpendicular to each other. The bracket has a first end face and a second end face that are perpendicular to each other (the first end face and the second end face are not shown in the figure). The first positioning part 11 is configured to abut against the first end face, and the second positioning part 12 is configured to abut against the second end face, thereby achieving the purpose of limiting the instantaneous test fixture 1 of the circuit breaker along the first direction and the second direction, improving the stability and reliability of the instantaneous test fixture 1 of the circuit breaker, and avoiding phenomena such as shaking and displacement.

[0072] Since instantaneous testing of circuit breakers typically involves high current and rapid operating response, if the instantaneous testing fixture 1 is magnetic, it may become part of the magnetic field, thus interfering with the accuracy of the test results. A non-magnetic instantaneous testing fixture 1 can reduce this interference and ensure the reliability of the test results. Therefore, in this embodiment, both the positioning element 10 and the limiting element 20 are non-magnetic, thereby avoiding interference from the magnetic field on the test results. Simultaneously, instantaneous testing typically involves large currents (such as short-circuit currents), and magnetic fixtures can generate eddy currents in high-frequency or rapidly changing magnetic fields. Therefore, the use of non-magnetic materials in the instantaneous testing fixture 1 in this embodiment can prevent the generation of eddy current effects.

[0073] For example, both the positioning member 10 and the limiting member 20 are made of aluminum or stainless steel. Furthermore, the circuit breaker instantaneous test fixture 1 can also be made of other non-magnetic or non-magnetic materials.

[0074] Example 2

[0075] like Figure 10As shown, this embodiment provides a circuit breaker instantaneous testing fixture 1. The main difference between this circuit breaker instantaneous testing fixture 1 and Embodiment 1 is that the circuit breaker instantaneous testing fixture 1 in this embodiment also includes a handle 40. One end of the handle 40 is rotatably connected to one side of the positioning member 10, and the other end of the handle 40 is rotatably connected to the other side of the positioning member 10. After testing, the handle 40 can be rotated to reduce the volume of the circuit breaker instantaneous testing fixture 1, making it easier to store. At the same time, the handle 40 in this embodiment makes it easier for operators to lift and improve the efficiency of inserting and removing the circuit breaker instantaneous testing fixture 1 from the circuit breaker 100 bracket.

[0076] The remaining structures of the instantaneous circuit breaker test fixture 1 in this embodiment are the same as those in Embodiment 1, and will not be described in detail here.

[0077] Example 3

[0078] like Figures 11-13 As shown, this embodiment provides a circuit breaker instantaneous testing fixture 1, which is installed in a circuit breaker 100 with a four-stage transmission structure. This four-stage transmission structure includes a primary transmission structure (composed of a traction rod 110 and a first re-clamp 1201), a secondary transmission structure (composed of the first re-clamp 1201 and a second re-clamp 1202), a tertiary transmission structure (composed of the second re-clamp 1202 and a locking latch 130), and a final transmission structure (composed of the locking latch 130 and a trip latch 140). Exemplarily, according to the specific structure and type of the circuit breaker 100, the limiting member 20 in the circuit breaker instantaneous testing fixture 1 of this embodiment is designed to be located beside the positioning member 10, facilitating the limiting member 20 to abut and limit the first re-clamp 1201.

[0079] For example, the circuit breaker instantaneous test fixture 1 in this embodiment can be inserted into the primary transmission structure, or into the secondary transmission structure, or into the tertiary transmission structure, as long as it is ensured that the final transmission structure will not trip during the test.

[0080] Understandably, operators can flexibly design the shape of the instantaneous test fixture 1 for the circuit breaker according to the actual structure of the circuit breaker 100 product, so as to improve the flexibility and applicability of the instantaneous test fixture 1 for the circuit breaker.

[0081] For example, such as Figure 13As shown, the limiting part 22 in this embodiment includes a first bending part 222 and a second bending part 223 that are perpendicularly connected to each other. The end of the first bending part 222 away from the second bending part 223 is connected to the connecting part 21. The second bending part 223 extends toward the bracket side close to the circuit breaker 100. This allows the second bending part 223 to maintain a certain distance from the positioning member 10, avoiding interference between the two. At the same time, it also ensures that the second bending part 223 is as close as possible to the first re-clamp 1201, reducing the impact momentum of the first re-clamp 1201 on the second bending part 223 and improving the protection of the instantaneous test fixture 1 of the circuit breaker.

[0082] The remaining structures of the instantaneous circuit breaker test fixture 1 in this embodiment are the same as those in Embodiment 1, and will not be described in detail here.

[0083] Example 4

[0084] like Figures 14-16 As shown, this embodiment provides a circuit breaker instantaneous test fixture 1, which is designed as a long shaft. This circuit breaker instantaneous test fixture 1 can be used for testing... Figure 14 In the circuit breaker 100 product. Specifically, the long shaft can be directly inserted into the gap between the second re-clamp 1202 of the secondary transmission structure and the bracket of the circuit breaker 100, so as to prevent the second re-clamp 1202 of the secondary transmission from rotating when the primary transmission trips, and ultimately restrict the tripping of the final transmission structure, thereby avoiding the separation of the moving contact 150 and the stationary contact 160 to generate an electric arc.

[0085] It is understood that the circuit breaker structure in this embodiment is the same as the circuit breaker structure in Embodiment 3.

[0086] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0087] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A circuit breaker instantaneous testing fixture, characterized in that, include: Positioning member (10), one side of which is provided with a positioning part, which is configured to be inserted into the bracket of the circuit breaker (100); A limiting member (20) is connected to the positioning member (10). When the positioning member (10) is inserted into the bracket of the circuit breaker (100), the limiting member (20) is configured to restrict the rotation of the re-clamp (120) in the circuit breaker (100), so that the re-clamp (120) restricts the rotation of the latch (130), the latch (130) restricts the rotation of the trip latch (140), and the trip latch (140) restricts the rotation of the moving contact (150).

2. The instantaneous testing fixture for circuit breakers according to claim 1, characterized in that, The positioning member (10) is recessed with a positioning groove (13), and the limiting member (20) includes a connecting part (21) and a limiting part (22) that are connected to each other. The connecting part (21) is embedded in the positioning groove (13), and the limiting part (22) is placed outside the positioning groove (13) and is used to limit the rotation of the re-clamp (120) in the circuit breaker (100).

3. The instantaneous testing fixture for circuit breakers according to claim 2, characterized in that, The positioning groove (13) is polygonal, and the shape of the connecting part (21) matches the shape of the positioning groove (13).

4. The instantaneous testing fixture for circuit breakers according to claim 2, characterized in that, The limiting part (22) is provided with a chamfer (221) or a rounded corner at the end opposite to the connecting part (21).

5. The instantaneous testing fixture for circuit breakers according to claim 2, characterized in that, The limiting part (22) includes a first bending part (222) and a second bending part (223) that are perpendicularly connected to each other. The end of the first bending part (222) away from the second bending part (223) is connected to the connecting part (21), and the second bending part (223) extends toward the bracket side close to the circuit breaker (100).

6. The instantaneous testing fixture for circuit breakers according to claim 2, characterized in that, The bottom wall of the positioning groove (13) is provided with a first mounting hole (131), and the connecting part (21) is provided with a second mounting hole (211). The circuit breaker instantaneous test fixture also includes a connector (30), one end of which passes through the first mounting hole (131) and is detachably connected to the second mounting hole (211).

7. The instantaneous test fixture for circuit breakers according to claim 6, characterized in that, The instantaneous test fixture for the circuit breaker also includes a handle (40), on which a third mounting hole (41) is provided. One end of the connector (30) passes through the second mounting hole (211) and is detachably connected to the third mounting hole (41).

8. The instantaneous test fixture for circuit breakers according to claim 6, characterized in that, The instantaneous test fixture for the circuit breaker also includes a handle (40), one end of which is rotatably connected to one side of the positioning member (10), and the other end of which is rotatably connected to the other side of the positioning member (10).

9. The instantaneous testing fixture for circuit breakers according to claim 1, characterized in that, The positioning part includes a first positioning part (11) and a second positioning part (12) connected to each other. The first positioning part (11) is connected to the positioning member (10). The first positioning part (11) extends along a first direction, and the second positioning part (12) extends along a second direction. The first direction and the second direction are perpendicular to each other. The bracket has a first end face and a second end face that are perpendicular to each other. The first positioning part (11) is configured to abut against the first end face, and the second positioning part (12) is configured to abut against the second end face.

10. The instantaneous test fixture for circuit breakers according to any one of claims 1-9, characterized in that, Both the positioning element (10) and the limiting element (20) are non-magnetic.

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