Conductive loop insulation structure, circuit breaker and isolating switch

Abstract

The utility model relates to a conductive loop insulation structure. The conductive loop insulation structure comprises a connecting plate insulation bottom plate and a static contact bridge insulation bottom plate. A connecting plate insulating bottom plate connecting screw is arranged between the base and the connecting plate insulating bottom plate; the connecting plate insulating bottom plate is provided with connecting plate insulating partition plates, and the connecting plate insulating partition plates are continuously arranged between the connecting plate screws of the adjacent moving and static contact assembly mounting grooves, between the connecting plate screws and the mounting screws located on one side of the connecting plate, and between the connecting plate screws and the connecting plate insulating bottom plate connecting screws; the static contact bridge insulation bottom plate is provided with static contact bridge insulation partition plates, and the static contact bridge insulation partition plates are arranged between the static contact bridge screws of the adjacent moving and static contact assembly installation grooves and outside the installation screws located on one side of the static contact bridge. Compared with the prior art, through the matching of the boss characteristic on the bottom plate and the groove on the base of the circuit breaker, the creepage distance is increased, and the overall insulation performance of the circuit breaker is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers and relates to a conductive loop insulation structure, a circuit breaker and an isolating switch. Background Art

[0002] With the continuous upgrade of new power distribution systems, the rated operating voltage of circuit breakers continues to increase. While ensuring miniaturization, the insulation performance of circuit breakers needs to be further improved. For high-voltage applications, most existing circuit breakers use a large base plate for insulation. However, this solution does not fully improve the insulation performance of the circuit breaker and has poor heat dissipation. In normal use, the mounting screws and the cabinet are in a state of electrical contact, and the distance between the live screws in the conductive circuit and between the live screws and the mounting screws is also relatively close. Long-term high voltage support coupled with high product temperature rise will reduce the insulation capacity of various parts, increase the risk of insulation breakdown, and pose a safety hazard, especially in relatively harsh environments. Summary of the Invention

[0003] The purpose of the utility model is to provide a conductive loop insulation structure, an insulation structure, a circuit breaker and a disconnector, which can comprehensively increase the insulation and safety of the circuit breaker and improve the heat dissipation performance of the circuit breaker.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A first aspect of the present invention provides a conductive loop insulation structure, which is arranged between a base and a fixed base, wherein the base and the fixed base are connected by mounting screws located on one side of the base's static contact bridge and one side of a connecting plate, respectively; a screw sink for mounting the screws is provided on the base, and a plurality of movable and static contact assembly mounting slots are arranged in parallel on the base, wherein both ends of the movable and static contact assembly mounting slots are respectively provided with a static contact bridge screw and a connecting plate screw;

[0006] The conductive circuit insulation structure includes a connecting plate insulation base plate and a static contact bridge insulation base plate;

[0007] Connecting screws for the insulating bottom plate of the connecting plate are provided between the base and the insulating bottom plate of the connecting plate;

[0008] The connecting plate insulating bottom plate is provided with a connecting plate insulating partition plate, and the connecting plate insulating partition plate is continuously arranged between the connecting plate screws of adjacent movable and static contact assembly mounting slots, between the connecting plate screws and the mounting screws located on one side of the connecting plate, and between the connecting plate screws and the connecting plate insulating bottom plate connecting screws;

[0009] The static contact bridge insulating base plate is provided with a static contact bridge insulating partition plate, which is arranged between the static contact bridge screws of adjacent moving and static contact assembly mounting slots and outside the mounting screws on one side of the static contact bridge.

[0010] Furthermore, screw assembly seats are provided on both sides of the bottom surface of the base, screw holes are opened on the connecting plate insulating bottom plate, and the base and the connecting plate insulating bottom plate are connected by connecting plate insulating bottom plate connecting screws that pass through the screw holes and are connected to the screw assembly seats.

[0011] Furthermore, the connecting plate insulating partition plate includes a first connecting plate insulating barrier wall and a second connecting plate insulating barrier wall.

[0012] The first connecting plate insulating retaining wall includes an inner retaining wall provided in the screw sink and semi-enclosed outside the mounting screw, and a connecting plate screw retaining wall connected to the inner retaining wall and provided between the connecting plate screws of the adjacent movable and static contact assembly mounting slots;

[0013] The second connecting plate insulating retaining wall is connected to the opening edge of the adjacent inner retaining wall, and extends from the opening edge of the inner retaining wall, along the outer side of the movable and static contact assembly mounting groove to the outside of the screw assembly seat and semi-encloses it from the inner side;

[0014] The bottom surface of the base is provided with a connecting plate insulating assembly groove, and the first connecting plate insulating retaining wall and the second connecting plate insulating retaining wall are embedded in the connecting plate insulating assembly groove.

[0015] Furthermore, a hexagonal nut is threadedly connected to the mounting screw, and the insulating retaining wall of the first connecting plate is conformably sleeved on the hexagonal nut.

[0016] Furthermore, the bottom surface of the base is provided with a static contact bridge insulation assembly groove, and the static contact bridge insulation assembly groove includes a straight groove connected to the screw sink; the straight groove is provided between adjacent movable and static contact assembly installation grooves and separates the static contact bridge screws in the adjacent movable and static contact assembly installation grooves;

[0017] The static contact bridge insulating partition plate includes a screw insulating platform adapted to the screw sinking platform on one side of the static contact bridge, and a static contact bridge partition wall connected to the screw insulating platform, wherein the static contact bridge partition wall is used to separate the static contact bridge screws in the mounting slots of adjacent moving and static contact assemblies;

[0018] The insulating assembly groove of the static contact bridge is embedded in the screw sink, and the partition wall of the static contact bridge is embedded in the straight groove.

[0019] Furthermore, the straight groove is a stepped groove along the length direction.

[0020] Furthermore, the screw sink on one side of the static contact bridge is a triangular prism-shaped sink, and the straight groove is connected to one of the edges.

[0021] Furthermore, the triangular prism-shaped sink and the screw sink are relatively provided with openings for the installation screws to pass through.

[0022] Furthermore, the insulating assembly groove of the static contact bridge further includes slots provided on both sides of the bottom of the base, and the insulating partition plate of the static contact bridge further includes ribs provided on both sides, and the ribs are embedded in the slots.

[0023] Furthermore, the insulating bottom plate of the static contact bridge is also provided with a slot for assembling an arc extinguishing hood partition plate, and the arc extinguishing hood partition plate is used to separate the arc extinguishing chambers corresponding to the installation slots of the moving and static contact assemblies.

[0024] A second aspect of the present invention provides a circuit breaker, comprising the conductive loop insulation structure as described above.

[0025] A third aspect of the present invention provides an isolating switch, comprising the conductive loop insulation structure as described above.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1) This utility model redesigns the base plate and base. By combining the boss features on the base plate with the grooves on the circuit breaker base, the creepage distance between the two-phase conductive circuits at the input and output terminals and between the single-phase conductive circuit and the mounting screws are increased, thereby enhancing the insulation capacity between the phases of the circuit breaker and between the phases and the fixing base, and improving the overall insulation performance of the circuit breaker.

[0028] 2) The present invention no longer uses a single large insulating base plate, but instead adopts a frame structure constructed with ribs at the bottom of the base, which reduces the use of raw materials, improves safety, and also improves the heat dissipation effect in the area near the contact between the moving and static contacts of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of a circuit breaker with an insulation structure in the utility model;

[0030] Figure 2 This is a cross-sectional view of the utility model after the base, the connecting plate insulating bottom plate, and the static contact bridge insulating bottom plate are assembled;

[0031] Figure 3 is a structural diagram of the base;

[0032] Figure 4 It is a structural diagram of the insulating base plate of the connecting plate;

[0033] Figure 5 This is a structural diagram of the insulating base plate of the static contact bridge;

[0034] Description of the marks in the figure:

[0035] 1. Circuit breaker body; 11. Base; 1101. First connecting plate insulation assembly slot; 1102. Static contact bridge insulation assembly slot; 1103. Second connecting plate insulation assembly slot; 12. Connecting plate insulation base plate; 1201. First connecting plate insulation retaining wall; 1202. Second connecting plate insulation retaining wall; 13. Connecting plate insulation base plate connecting screws; 14. Static contact bridge screws; 15. Connecting plate screws; 2. Static contact bridge insulation base plate; 201. Static contact bridge insulation partition plate; 202. Rib; 3. Mounting screws; 4. Cabinet. DETAILED DESCRIPTION

[0036] The following embodiments are implemented based on the above technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0038] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0039] Example

[0040] like Figure 1 The circuit breaker shown includes a circuit breaker body 1, which comprises a base 11 and a cabinet 4 (i.e., a fixed base). The base 11 and cabinet 4 are connected via mounting screws 3 located on the stationary contact bridge side and the connecting plate side of the base 11, respectively. A screw sink for mounting the screws 3 is provided on the base 11. The base 11 also has multiple mounting slots for the movable and stationary contact assemblies, each end of which is provided with a stationary contact bridge screw 14 and a connecting plate screw 15. The circuit breaker also includes a conductive loop insulation structure disposed between the base 11 and the cabinet 4.

[0041] Conductive circuit insulation structure, such as Figure 2 and Figure 3As shown, it includes a connecting plate insulating base plate 12 and a static contact bridge insulating base plate 2, and a connecting plate insulating base plate connecting screw is provided between the base 11 and the connecting plate insulating base plate 12; a connecting plate insulating separator is provided on the connecting plate insulating base plate 12, and the connecting plate insulating separator is continuously arranged between the connecting plate screws 15 of the adjacent moving and static contact assembly mounting slots, between the connecting plate screws 15 and the mounting screws 3 located on one side of the connecting plate, and between the connecting plate screws 15 and the connecting plate insulating base plate connecting screws; a static contact bridge insulating separator is provided on the static contact bridge insulating base plate 2, and the static contact bridge insulating separator is arranged between the static contact bridge screws 14 of the adjacent moving and static contact assembly mounting slots, and outside the mounting screws 3 located on one side of the static contact bridge.

[0042] This embodiment uses the boss features on the bottom plate and the grooves on the circuit breaker base to increase the creepage distance between the two-phase conductive circuits at the input and output terminals, and between the single-phase conductive circuit and the mounting screws. It also enhances the insulation capacity between the circuit breaker phases and between the phases and the cabinet, improving safety while also improving the heat dissipation performance of the circuit breaker.

[0043] In some specific embodiments, screw assembly seats are provided on both sides of the bottom surface of the base 11, and screw holes are opened on the connecting plate insulating bottom plate 12. The base 11 and the connecting plate insulating bottom plate 12 are connected by connecting plate insulating bottom plate connecting screws that pass through the screw holes and are connected to the screw assembly seats.

[0044] In some specific embodiments, the connecting plate insulating partition plate includes a first connecting plate insulating barrier wall 1201 and a second connecting plate insulating barrier wall 1202, the first connecting plate insulating barrier wall 1201 includes an inner barrier wall arranged in the screw sink and semi-enclosed outside the mounting screw 3, and a connecting plate screw barrier wall connected to the inner barrier wall and arranged between the connecting plate screws 1514 in the adjacent moving and static contact assembly mounting grooves; the second connecting plate insulating barrier wall 1202 is connected to the opening edge of the adjacent inner barrier wall, and extends from the opening edge of the inner barrier wall, along the outside of the moving and static contact assembly mounting grooves to the outside of the screw assembly seat and semi-encloses from the inside; a connecting plate insulating assembly groove 1103 is opened on the bottom surface of the base 11, and the first connecting plate insulating barrier wall 1201 and the second connecting plate insulating barrier wall 1202 are embedded in the connecting plate insulating assembly groove 1103.

[0045] In some specific embodiments, a hexagonal nut is threadedly connected to the mounting screw 3 , and the first connecting plate insulating barrier 1201 is conformably sleeved on the hexagonal nut.

[0046] In some specific embodiments, a static contact bridge insulating assembly groove 1102 is provided on the bottom surface of the base 11, and the static contact bridge insulating assembly groove 1102 includes a connected straight groove connected to the screw sink; the straight groove is provided between adjacent moving and static contact assembly mounting grooves, and separates the static contact bridge screws 14 in the adjacent moving and static contact assembly mounting grooves; the static contact bridge insulating partition plate 201 includes a screw insulating platform adapted to the screw sink on one side of the static contact bridge, and a static contact bridge partition wall connected to the screw insulating platform, and the static contact bridge partition wall is used to separate the static contact bridge screws 14 in the adjacent moving and static contact assembly mounting grooves; the static contact bridge insulating assembly groove 1102 is embedded in the screw sink, and the static contact bridge partition wall is embedded in the straight groove.

[0047] In some specific embodiments, the straight groove is a stepped groove along the length direction.

[0048] In some specific embodiments, the screw sink on one side of the static contact bridge is a triangular prism-shaped sink, and the straight groove is connected to one of the edges.

[0049] In some specific embodiments, the triangular prism-shaped sink and the screw sink are relatively provided with openings for the installation screws 3 to pass through.

[0050] In some specific embodiments, the static contact bridge insulating assembly groove 1102 further includes slots provided on both sides of the bottom of the base 11 , and the static contact bridge insulating partition plate 201 further includes ribs 202 provided on both sides, and the ribs 202 are embedded in the slots.

[0051] In some specific embodiments, the static contact bridge insulating base plate 2 is further provided with a slot for assembling an arc extinguishing hood partition plate, and the arc extinguishing hood partition plate is used to separate the arc extinguishing chambers corresponding to the installation slots of the moving and static contact assemblies.

[0052] This embodiment is implemented in the following ways: Figure 1 、 Figure 2 As shown, the circuit breaker body 1 includes a base 11, a connecting plate insulating bottom plate 12, connecting plate insulating bottom plate connecting screws 13, static contact bridge screws 14, connecting plate screws 15 and other parts. Figure 3 、 Figure 4 As shown, the bottom of the lower end of the base 11 is alternately provided with a first connecting plate insulating assembly groove 1101 and a second connecting plate insulating assembly groove 1103 with a stepped shape around the inner edge. The connecting plate insulating bottom plate 12 is provided with a corresponding first connecting plate insulating retaining wall 1201 and a second connecting plate insulating retaining wall 1202. The boss of the connecting plate insulating bottom plate 12 is aligned with the groove of the base 11 and snapped into it, and is firmly fixed to the base 11 by the connecting plate insulating bottom plate connecting screws 13. Figure 3 、 Figure 5As shown, the upper end of the bottom of the base 11 is provided with static contact bridge insulation assembly grooves 1102 at intervals. During installation, a static contact bridge insulation bottom plate 2 is also provided, on which a static contact bridge insulation partition plate 201 corresponding to the static contact bridge insulation assembly grooves 1102 is provided, and a through hole is opened in the middle of the boss; the static contact bridge insulation bottom plate 2 is centered and aligned with the bottom of the base 11, and the mounting screws 3 pass through the through holes on the circuit breaker body 1 and the first connecting plate insulation retaining wall 201, and they are firmly fixed to the cabinet 4.

[0053] Working principle:

[0054] In existing technologies, when used in high-voltage applications, an arc extinguishing hood and a matching base plate are usually installed outside the circuit breaker body to isolate and extinguish the arc. However, during use, the overall insulation effect of the circuit breaker needs to be improved. With the trend of miniaturization and high voltage of circuit breakers, the phase spacing of most circuit breakers is relatively small, resulting in slightly insufficient insulation between the two-phase conductive circuits and between the conductive circuits and the cabinet. This is especially true in some new energy power distribution scenarios, where the dense installation and arrangement of circuit breakers in the cabinet results in high ambient temperatures and relatively poor humidity, air pressure and other environmental conditions. Therefore, it is necessary to further strengthen the insulation performance of the circuit breaker in all aspects. This structure mainly improves the insulation capacity between the two-phase conductive circuits of the circuit breaker and between the conductive circuits and the cabinet.

[0055] During normal use, both the static contact bridge screws 14 and the connecting plate screws 15 are conductors carrying a rated operating voltage. The mounting screws 3 and the cabinet 4 are in contact with each other, and the connecting plate insulating base plate connecting screws 13 securing the connecting plate insulating base plate 12 are also in contact with the cabinet 4. Therefore, insulation between the circuit breaker's conductive circuit and the connecting plate insulating base plate connecting screws 13 and mounting screws 3 is also crucial. This will be explained specifically using phases A and B; the principles for phases B and C are the same.

[0056] like Figure 2 、 Figure 4As shown, at the bottom of the lower end of the circuit breaker, the creepage distance between the connecting plate screws 15 between phases A and B is the shortest. The lower bottom end of the base 11 is alternately provided with a Y-shaped first connecting plate insulating assembly groove 1101 and a second connecting plate insulating assembly groove 1103 with a stepped shape around the inner edge. The connecting plate insulating base plate 12 is provided with corresponding first and second connecting plate insulating barriers 1201 and 1202. The boss of the connecting plate insulating base plate 12 cooperates with the groove of the base 11 to ensure that the minimum creepage distance between phases A and B runs from the connecting plate screw 15 of phase A to the edge of the corresponding screw hole, then to phase B, passing through the first connecting plate insulating barrier 1201, to the edge of the connecting plate screw hole of phase B, and finally to the connecting plate screw 15 of phase B. According to calculations based on this structure, compared with the prior art, the creepage distance between phases A and B at this point is significantly increased, significantly improving the insulation capability between the conductive circuits of phases A and B.

[0057] With this structure in place, the minimum creepage distance between the circuit breaker's conductive loop and mounting screw 3 is from the A-phase connecting plate screw 15 to the edge of the corresponding screw hole, then over the first connecting plate insulating barrier 1201, and finally to the mounting screw 3. Calculated based on this structure, the creepage distance between phase A and the mounting screw 3 is significantly increased, effectively strengthening the insulation between the circuit breaker and the cabinet 4. Similarly, the combination of the second connecting plate insulating mounting groove 1103 on the base and the second connecting plate insulating barrier 1202 on the bottom plate strengthens the insulation of the circuit breaker's conductive loop from the bottom to the cabinet 4.

[0058] The upper bottom of the base 11 is alternately provided with Y-shaped static contact bridge insulation assembly grooves 1102, and the static contact bridge insulation bottom plate 2 is provided with corresponding static contact bridge insulation partition plates 201. The principle is the same as that of the lower end mentioned above, and the insulation capacity is improved by increasing the creepage distance of the static contact bridge screws 14 between two adjacent phases and increasing the creepage distance between the static contact bridge screws 14 and the mounting screws 3; the insulation between the upper end conductive circuit and the cabinet 4 is enhanced through the ribs 202 on both sides of the static contact bridge insulation bottom plate 2 and the front end structure.

[0059] like Figure 5 As shown, in actual use, the front end of the static contact bridge insulating base plate 2 can also be used in conjunction with the configured arc extinguishing shield to meet other functional requirements such as arc extinguishing, realizing multiple uses for a single component. In high-voltage power distribution applications, since a separate large insulating base plate is no longer required, there is no sealing or shielding at the bottom of the moving and static contact areas. In addition, the base 11 adopts a structural form with longitudinal and transverse reinforcement ribs, which reduces the wall thickness and optimizes the heat dissipation effect in this key heat-generating area.

[0060] In other embodiments, the bosses of the bottom plate and the grooves of the bottom of the base may be designed in other shapes, as long as the connecting plate screws and the mounting screws are separated.

[0061] In other embodiments, in addition to being used in molded case circuit breakers, this structure can also be used in products such as disconnectors that adopt a molded case structure.

[0062] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A conductive loop insulation structure, characterized in that: The base (11) is provided between the base (11) and the fixed base, and the base (11) and the fixed base are connected by mounting screws (3) respectively located on one side of the static contact bridge and one side of the connecting plate of the base (11); a screw sink for mounting the screws (3) is provided on the base (11), and a plurality of movable and static contact assembly mounting slots are arranged in parallel on the base (11), and static contact bridge screws (14) and connecting plate screws (15) are respectively provided at both ends of the movable and static contact assembly mounting slots; The conductive loop insulation structure includes a connecting plate insulation base plate (12) and a static contact bridge insulation base plate (2); A connecting plate insulating bottom plate connecting screw (13) is provided between the base (11) and the connecting plate insulating bottom plate (12); The connecting plate insulating base plate (12) is provided with a connecting plate insulating partition plate, and the connecting plate insulating partition plate is continuously arranged between the connecting plate screws (15) of the adjacent moving and static contact assembly mounting slots, between the connecting plate screws (15) and the mounting screws (3) located on one side of the connecting plate, and between the connecting plate screws (15) and the connecting plate insulating base plate connecting screws (13); A static contact bridge insulating partition plate is provided on the static contact bridge insulating base plate (2), and the static contact bridge insulating partition plate is arranged between the static contact bridge screws (14) of the adjacent moving and static contact assembly mounting slots, and outside the mounting screws (3) located on one side of the static contact bridge.

2. The conductive loop insulation structure according to claim 1, characterized in that: Screw assembly seats are provided on both sides of the bottom surface of the base (11), screw holes are opened on the connecting plate insulating bottom plate (12), and the base (11) and the connecting plate insulating bottom plate (12) are connected by connecting plate insulating bottom plate connecting screws (13) that penetrate the screw holes and are connected to the screw assembly seats.

3. The conductive loop insulation structure according to claim 2, characterized in that: The connecting plate insulating partition plate comprises a first connecting plate insulating barrier (1201) and a second connecting plate insulating barrier (1202). The first connecting plate insulating retaining wall (1201) comprises an inner retaining wall provided in the screw sink and semi-enclosed outside the mounting screw (3), and a connecting plate screw retaining wall connected to the inner retaining wall and provided between the connecting plate screws (15) of the adjacent moving and static contact assembly mounting slots; The second connecting plate insulating retaining wall (1202) is connected to the opening edge of the adjacent inner retaining wall, and extends from the opening edge of the inner retaining wall along the outer side of the movable and static contact assembly installation slot to the outside of the screw assembly seat and semi-encloses it from the inner side; The bottom surface of the base (11) is provided with a first connecting plate insulating assembly groove (1101) and a second connecting plate insulating assembly groove (1103); the first connecting plate insulating retaining wall (1201) is embedded in the first connecting plate insulating assembly groove (1101); and the second connecting plate insulating retaining wall (1202) is embedded in the second connecting plate insulating assembly groove (1103).

4. The conductive loop insulation structure according to claim 3, characterized in that: A hexagonal nut is threadedly connected to the mounting screw (3), and the first connecting plate insulating retaining wall (1201) is conformably sleeved on the hexagonal nut.

5. The conductive loop insulation structure according to claim 1, characterized in that: The bottom surface of the base (11) is provided with a static contact bridge insulation assembly groove (1102), and the static contact bridge insulation assembly groove (1102) includes a straight groove connected to the screw sink; the straight groove is provided between adjacent movable and static contact assembly installation grooves and separates the static contact bridge screws (14) in the adjacent movable and static contact assembly installation grooves; The static contact bridge insulating partition plate (201) comprises a screw insulating platform adapted to the screw sinking platform on one side of the static contact bridge, and a static contact bridge partition wall connected to the screw insulating platform, wherein the static contact bridge partition wall is used to separate the static contact bridge screws (14) in the installation slots of adjacent moving and static contact assemblies; The static contact bridge insulating assembly groove (1102) is embedded in the screw sink, and the static contact bridge partition wall is embedded in the straight groove.

6. The conductive loop insulation structure according to claim 5, characterized in that: The screw sink on one side of the static contact bridge is in the shape of a triangular prism, and the straight groove is connected to one of the edges.

7. The conductive loop insulation structure according to claim 5, characterized in that: The static contact bridge insulating assembly groove (1102) further includes slots provided on both sides of the bottom of the base (11), and the static contact bridge insulating partition plate (201) further includes ribs (202) provided on both sides, wherein the ribs (202) are embedded in the slots.

8. The conductive loop insulation structure according to claim 5, characterized in that: The static contact bridge insulating bottom plate (2) is also provided with a slot for assembling an arc extinguishing hood partition plate, and the arc extinguishing hood partition plate is used to separate arc extinguishing chambers corresponding to the installation slots of the moving and static contact assemblies.

9. A circuit breaker, characterized in that: The conductive loop insulation structure comprises the conductive loop insulation structure according to any one of claims 1 to 8.

10. An isolating switch, characterized in that: The conductive loop insulation structure comprises the conductive loop insulation structure according to any one of claims 1 to 8.

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