Fixed frame circuit breaker connection structure and installation method thereof

Abstract

The application relates to a fixed frame circuit breaker wiring structure and a mounting method thereof, which comprises a body, two wiring terminals longitudinally spaced apart and fixed to the inner side of the rear end of the body, the wiring terminals being exposed at the rear end of the body, two adapter rows respectively arranged at the rear end of the body, the front end of the adapter row being connected with the rear end of the corresponding wiring terminal, and a base arranged at the rear end of the body and covering the outer side of the adapter row. The adapter row and the wiring terminal are first fixedly connected into an integral assembly, and then the base is fixedly connected with the integral assembly, so that the mounting steps are reasonable, the adapter row and the wiring terminal are closely connected, the mounting efficiency is improved, the production cost and the maintenance cost are low, and the fixed circuit breaker body of different current grades in the same series is adapted. The adapter row part extending from the upper end of the body is exposed at the front end of the base, and the adapter row part extending from the lower end of the body is exposed at the front end of the base, so that all the wiring and maintenance operations can be completed on the front face of the cabinet body, and the safety is high.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more particularly to the wiring structure and installation method of a fixed frame circuit breaker. Background Technology

[0002] Currently, fixed-frame circuit breakers typically have wiring at the rear end of the circuit breaker or on the vertical end face, which has the following drawbacks in practical applications: (1) Inconvenient installation and maintenance: Wiring behind the panel requires operation at the back of the cabinet. Installation, maintenance and replacement require disassembling the back door of the cabinet. The operating space is small, the risk of live work is high, and the construction and maintenance efficiency is extremely low. (2) Complex busbar processing: Existing conversion wiring schemes mostly use bent busbars, which require customized bending processing. Not only is the process complicated and the processing cost high, but stress concentration is also prone to occur at the bending point. Under high current conditions, local heating and increased resistance are likely to occur. In addition, bent busbars occupy the longitudinal space of the cabinet, which is not conducive to the layout of compact distribution cabinets. (3) Unreasonable assembly sequence: Most existing similar transition structures first fix the base, then install the transition strip, and finally install the circuit breaker body. The alignment accuracy is poor, and it is easy for the transition strip and the body wiring terminals to be misaligned or not properly tightened, which affects the reliability of electrical connection. The assembly process is cumbersome and not conducive to mass production and on-site modification.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention discloses a fixed frame circuit breaker wiring structure and its installation method, thereby solving the problems of complex assembly, high cost, and unreliable electrical connection performance of circuit breaker wiring structures.

[0005] The technical solution adopted in this invention is as follows: A fixed frame circuit breaker wiring structure includes: a body; two terminals, longitudinally spaced apart, fixed to the rear end of the body, with the terminals exposed at the rear end of the body; two adapter bars, each located at the rear end of the body, with the front end of the adapter bar connected to the rear end of the corresponding terminal; and a base located at the rear end of the body, covering the outer side of the adapter bars; wherein the upper adapter bar extends beyond the upper end of the body, with the portion extending beyond the upper end of the body exposed at the front end of the base, and the lower adapter bar extends beyond the lower end of the body, with the portion extending beyond the lower end of the body exposed at the front end of the base.

[0006] A further technical solution is that the adapter is a vertical plate, and screws pass through the adapter and are threaded to the rear end of the terminal block.

[0007] A further technical solution is that a support groove is provided at the front end of the base for the adapter to be inserted.

[0008] A further technical solution is that a slot is opened at the rear end of the main body for the adapter to be inserted.

[0009] A further technical solution is that the wiring terminals and adapters are arranged in three sets at horizontal intervals.

[0010] A further technical solution is that the base forms partitions on both sides of the support groove, and insulating plates are provided at the upper and lower ends of the partitions. The insulating plate at the upper end extends out of the upper end of the partition, and the insulating plate at the lower end extends out of the lower end of the partition.

[0011] A further technical solution is that a positioning groove is opened at the front end of the base for the main body to be inserted, and the base is connected to the main body by screws.

[0012] A further technical solution is that a fixing hole is also provided on the base.

[0013] A further technical solution is to provide a through hole at the rear end of the body for the wiring terminals to pass through.

[0014] This invention also discloses an installation method for the aforementioned fixed frame circuit breaker wiring structure, comprising the following steps: The two adapter bars are fixedly connected to the two terminals respectively, so that the adapter bars and the main body form an integral component; The base is fixedly connected to the rear end of the main body and covered on the outside of the adapter. The adapter at the upper end extends out of the upper end of the main body, and the part extending out of the upper end of the main body is exposed at the front end of the base. The adapter at the lower end extends out of the lower end of the main body, and the part extending out of the lower end of the main body is exposed at the front end of the base. Secure the base to the cabinet.

[0015] The beneficial effects of the embodiments of the present invention are as follows: (i) The fixed frame circuit breaker wiring structure of the present invention first fixes the adapter and the terminal block into an integral component, and then fixes the base to the integral component together. The installation steps are reasonable and there will be no problem of misalignment. The adapter and the terminal block are tightly connected, the installation efficiency is increased by more than 40%, the electrical performance is stable, and the circuit breaker can be disassembled as a whole when it is maintained or replaced in the later stage, which greatly shortens the maintenance time.

[0016] (ii) Furthermore, since there is no need for customized bending of the busbar, the processing cost is low, and the problems of stress concentration and excessive temperature rise at the bending point are avoided. The use of vertical plate-shaped adapter busbars ensures a straight and smooth current path, reduces contact resistance by more than 30%, and results in lower temperature rise during high current operation.

[0017] (iii) Furthermore, since the adapter section extending from the upper end of the main body is exposed at the front end of the base, and the adapter section extending from the lower end of the main body is exposed at the front end of the base, all wiring and maintenance operations can be completed on the front of the cabinet without disassembling the rear door of the cabinet, thus avoiding the risk of live work at the rear of the cabinet, ensuring high safety and convenient maintenance.

[0018] (iv) Furthermore, since this application does not require modification of the traditional fixed circuit breaker body structure, the front wiring modification can be achieved simply by adding a straight transition bar and an insulating base, which is compatible with fixed circuit breaker bodies of different current ratings in the same series and has extremely strong compatibility.

[0019] (v) Furthermore, a support groove is provided at the front end of the base for the adapter to be inserted, and a slot is provided at the rear end of the body for the adapter to be inserted. The partitions formed between adjacent support grooves and between adjacent slots ensure electrical clearance and creepage distance, thereby improving safety. Attached Figure Description

[0020] Figure 1 This is an isometric view of the wiring structure of the fixed frame circuit breaker of the present invention.

[0021] Figure 2 This is an isometric view of the fixed frame circuit breaker wiring structure of the present invention without the adapter bar and base installed.

[0022] Figure 3 This is an isometric view of the fixed frame circuit breaker wiring structure of the present invention without the base installed.

[0023] Figure 4 This is an isometric view of the wiring terminals, transition bars, and base in the fixed frame circuit breaker wiring structure of the present invention.

[0024] Figure 5 for Figure 4 Cross-sectional view.

[0025] In the picture: 1. Body; 11. Slot; 12. Through hole; 2. Terminal block; 3. Adapter bar; 4. Base; 41. Positioning slot; 42. Support slot; 43. Fixing hole; 44. Clearance hole; 45. Partition plate; 5. Insulating plate. Detailed Implementation

[0026] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0027] Example: This embodiment discloses the wiring structure of a fixed frame circuit breaker.

[0028] like Figure 1 As shown, the wiring structure of the fixed frame circuit breaker includes a body 1, a terminal block 2, a transition bar 3, and a base 4.

[0029] like Figure 2 As shown, there are two terminals 2, arranged longitudinally at intervals, and fixed to the inner rear end of the body 1, with the terminals 2 protruding from the rear end of the body 1. For example, the terminal 2 at the upper end serves as a stationary busbar, and the terminal 2 at the lower end serves as a moving busbar. A through hole 12 is provided at the rear end of the body 1 for the terminals 2 to pass through, and the terminals 2 are snap-fitted and fixed to the inner rear end of the body 1.

[0030] Two adapter bars 3 are located at the rear end of the main body 1, with the front end of the adapter bar 3 connected to the rear end of the corresponding terminal block 2. For example, the adapter bar 3 is forged from T2 copper and is a vertical plate without any bending or folding design. Its current-carrying cross-sectional area is consistent with the original cross-sectional area of ​​the terminal block 2 in the circuit breaker main body 1, ensuring a matching rated current-carrying capacity. Screws pass through the adapter bar 3 and are threaded to the rear end of the terminal block 2. Preferably, an anti-loosening washer is provided between the screw and the adapter bar 3 to prevent the screw from loosening due to long-term operational vibration, ensuring a tight electrical connection and reducing contact resistance. A clearance hole 44 is provided on the base 4 to avoid screws.

[0031] The base 4 is located at the rear end of the main body 1 and covers the outside of the adapter 3. For example, the base 4 is injection molded from DMC (unsaturated polyester bulk molding compound) insulating material, which has excellent insulation performance, high mechanical strength, and high temperature resistance. The base 4 is snap-fitted to the main body 1. Specifically, the front end of the base 4 has a positioning groove 41 for the main body 1 to snap into, and the base 4 is screwed to the main body 1.

[0032] Among them, the upper adapter 3 extends out of the upper part of the main body 1, and the part extending out of the upper part of the main body 1 is exposed at the front end of the base 4; the lower adapter 3 extends out of the lower part of the main body 1, and the part extending out of the lower part of the main body 1 is exposed at the front end of the base 4.

[0033] like Figure 4 and Figure 5 As shown, furthermore, a support groove 42 is provided at the front end of the base 4 for the adapter strip 3 to be inserted. Figure 2 and Figure 3As shown, a slot 11 is provided at the rear end of the main body 1 for the adapter 3 to be inserted. Three sets of terminals 2 and adapter 3 are arranged horizontally at intervals, corresponding to the three phases respectively. The base 4 forms partitions 45 on both sides of the support groove 42, and the main body forms partitions 45 on both sides of the slot 11. The partitions 45 separate adjacent adapters 3 to ensure electrical clearance and creepage distance.

[0034] like Figure 4 and Figure 5 As shown, insulating plates 5 are further provided at the upper and lower ends of the partition 45. For example, the insulating plates 5 are snapped into the partition 45, with the upper insulating plate 5 extending beyond the upper end of the partition 45 and the lower insulating plate 5 extending beyond the lower end of the partition 45, further increasing the creepage distance and improving safety.

[0035] like Figure 4 As shown, a fixing hole 43 is further provided on the base 4, and screws pass through the fixing hole 43 to connect with the external cabinet.

[0036] This embodiment also discloses an installation method for the aforementioned fixed frame circuit breaker wiring structure, including the following steps: Step S1: Fix the two adapter strips 3 to the two terminals 2 respectively, so that the adapter strips 3 and the main body 1 form an integral component.

[0037] like Figure 2 and Figure 3 As shown, specifically, the adapter 3 is inserted into the slot 11 of the main body 1 to achieve initial positioning, and the screw passes through the adapter 3 and is threaded to the rear end of the terminal 2.

[0038] Step S2: Fix the base 4 to the rear end of the main body 1 and cover it on the outside of the adapter 3. The adapter 3 at the upper end extends out of the upper end of the main body 1, and the part extending out of the upper end of the main body 1 is exposed at the front end of the base 4. The adapter 3 at the lower end extends out of the lower end of the main body 1, and the part extending out of the lower end of the main body 1 is exposed at the front end of the base 4.

[0039] like Figure 1 , Figure 4 and Figure 5 As shown, specifically, the main body 1 is inserted into the positioning groove 41 of the base 4, and the adapter strip 3 is inserted into the support groove 42 of the base 4 to achieve the initial positioning of the base 4 and the overall assembly. The screw passes through the base 4 and is threadedly connected to the main body 1 to fix the main body 1 and the overall assembly together.

[0040] Step S3: Fix the base 4 inside the cabinet.

[0041] Specifically, the screw passes through the fixing hole 43 of the base 4 and connects to the external cabinet to fix the circuit breaker.

[0042] In this embodiment, by first fixing the three sets of adapter strips 3 and the corresponding three sets of terminals 2 into a whole component, and then fixing the base 4 together with the whole component, the installation steps are reasonable and there will be no problem of misalignment. The adapter strips 3 and terminals 2 are tightly connected, the installation efficiency is improved by more than 40%, the electrical performance is stable, and the circuit breaker can be disassembled and installed as a whole during later maintenance and replacement, which greatly shortens the maintenance time.

[0043] Furthermore, since there is no need for customized bending of the busbar, the processing cost is low, and the problems of stress concentration and excessive temperature rise at the bending point are avoided. The vertical plate-shaped adapter busbar 3 has a straight and smooth current path, reduces contact resistance by more than 30%, and has a lower temperature rise when operating at high current.

[0044] Furthermore, since the adapter bar 3 extending from the upper end of the main body 1 is exposed at the front end of the base 4, and the adapter bar 3 extending from the lower end of the main body 1 is exposed at the front end of the base 4, all wiring and maintenance operations can be completed on the front of the cabinet without disassembling the rear door of the cabinet, thus avoiding the risk of live work at the rear of the cabinet, ensuring high safety and convenient maintenance.

[0045] Furthermore, since this application does not require modification to the structure of the traditional fixed circuit breaker body 1, the front wiring modification can be achieved simply by adding a straight transition bar 3 and an insulating base 4, making it compatible with fixed circuit breaker bodies of different current ratings in the same series, with extremely strong compatibility.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A wiring structure for a fixed frame circuit breaker, characterized in that, The wiring structure of the fixed frame circuit breaker includes: ontology; Two wiring terminals are arranged longitudinally at intervals and are respectively fixed to the rear end of the inner side of the main body, with the wiring terminals exposed at the rear end of the main body. There are two adapter bars, each located at the rear end of the main body, and the front end of the adapter bar is connected to the rear end of the corresponding terminal block. The base is located at the rear end of the main body and covers the outside of the adapter bar; The adapter at the top extends beyond the top of the main body, with the portion extending beyond the top of the main body protruding to the front of the base. The adapter at the bottom extends beyond the bottom of the main body, with the portion extending beyond the bottom of the main body protruding to the front of the base.

2. The wiring structure of the fixed frame circuit breaker according to claim 1, characterized in that: The adapter is a vertical plate, and screws pass through the adapter and are threaded to the rear end of the terminal block.

3. The wiring structure of the fixed frame circuit breaker according to claim 1, characterized in that: The base has a support groove at its front end for the adapter to be inserted.

4. The wiring structure of the fixed frame circuit breaker according to claim 3, characterized in that: The rear end of the main body has a slot for the adapter to be inserted.

5. The wiring structure of the fixed frame circuit breaker according to claim 4, characterized in that: The wiring terminals and adapters are arranged in three sets at horizontal intervals.

6. The wiring structure of the fixed frame circuit breaker according to claim 5, characterized in that: The base forms partitions on both sides of the support groove. Insulating plates are provided at the upper and lower ends of the partitions. The insulating plate at the upper end extends out of the upper part of the partition, and the insulating plate at the lower end extends out of the lower part of the partition.

7. The wiring structure of the fixed frame circuit breaker according to claim 1, characterized in that: The base has a positioning groove at its front end for the main body to be inserted into, and the base is connected to the main body by screws.

8. The wiring structure of the fixed frame circuit breaker according to claim 1, characterized in that: The base also has fixing holes.

9. The wiring structure of the fixed frame circuit breaker according to claim 1, characterized in that: The rear end of the main body has a through hole for the wiring terminals to pass through.

10. An installation method using the fixed frame circuit breaker wiring structure according to any one of claims 1 to 9, characterized in that, Includes the following steps: The two adapter bars are fixedly connected to the two terminals respectively, so that the adapter bars and the main body form an integral component; The base is fixedly connected to the rear end of the main body and covered on the outside of the adapter. The adapter at the upper end extends out of the upper end of the main body, and the part extending out of the upper end of the main body is exposed at the front end of the base. The adapter at the lower end extends out of the lower end of the main body, and the part extending out of the lower end of the main body is exposed at the front end of the base. Secure the base to the cabinet.

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