A combined low voltage circuit breaker

Abstract

The utility model relates to circuit breaker technical field discloses a combined low voltage circuit breaker, including the mounting panel, the outer wall front side bottom fixed connection of mounting panel has the circuit breaker, the top of circuit breaker is opened to have the wiring hole, the inner wall of wiring hole is provided with the clamping mechanism, the outer wall front side top fixed connection of mounting panel has the mutual -inductor, the outer wall of mutual -inductor is provided with the adjusting mechanism, the clamping mechanism includes a plurality of conducting sheet no.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a combined low-voltage circuit breaker. Background Technology

[0002] A circuit breaker is a switching device that can connect, carry, and disconnect current under normal and fault conditions. It is widely used in low-voltage power distribution systems, industrial control equipment, and electrical wiring in buildings. In household electricity use, it can prevent safety accidents caused by circuit overload, short circuit, and other faults, ensuring the safety of electrical equipment and personnel. In factory production, it can ensure the stable operation of various electrical equipment and avoid production stoppages caused by power failures.

[0003] Traditional low-voltage circuit breakers typically consist of a contact system, arc-extinguishing device, trip unit, operating mechanism, and housing. When connecting wires to establish circuit continuity, operators must tighten screws using tools to press the conductive plates against the wires, thus establishing a reliable electrical connection. However, this method has significant drawbacks. Firstly, tightening the screws is cumbersome, consuming considerable time and effort in situations involving extensive wiring or emergency repairs, reducing work efficiency. Secondly, controlling the tightness of the screws is challenging; excessive loosening can lead to poor contact, causing overheating or even a fire hazard; excessive tightening can damage the wires, similarly affecting circuit stability.

[0004] To address the cumbersome installation process of traditional circuit breakers, existing technologies have been improved by employing a spring-conductive plate design. During installation, operators simply insert the wire between the two conductive plates, and the spring's elastic force automatically clamps the wire, eliminating the need for manual screw tightening and greatly simplifying the installation process. However, in actual use, this improved structure has also revealed new problems. Due to the differences in wire thickness and the potential for spring fatigue and reduced elasticity over long-term use, the wire may loosen, leading to increased contact resistance and subsequent overheating. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a combined low-voltage circuit breaker, which aims to improve the problem in the prior art where the spring and conductive sheet clamp the conductor, and the spring elasticity weakens over time, affecting the normal connection and safe operation of the circuit.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a combined low-voltage circuit breaker, including a mounting plate, a circuit breaker is fixedly connected to the bottom front side of the outer wall of the mounting plate, a wiring hole is opened on the top of the circuit breaker, a clamping mechanism is provided on the inner wall of the wiring hole, a current transformer is fixedly connected to the top front side of the outer wall of the mounting plate, and an adjustment mechanism is provided on the outer wall of the current transformer. The clamping mechanism includes multiple conductive plates, each of which is fixedly connected to the left side of the inner wall of the corresponding wiring hole. Each of the inner walls of the wiring holes has a sliding groove on its right side. Each of the sliding grooves has a conductive plate slidably connected to its inner wall. Each of the conductive plates has a mounting lug fixedly connected to its front outer wall. A lead screw is rotatably connected to the inner wall of the circuit breaker. Each of the mounting lugs is threadedly connected to the lead screw. A rotating handle is fixedly connected to the right side of the lead screw's outer wall. A positioning component is provided at the top of the inner wall of the wiring hole.

[0007] As a further description of the above technical solution: The adjusting mechanism includes a hollow cylinder, the rear end of which is fixedly connected to the top of the outer wall of the current transformer. A telescopic rod is slidably connected to the inner wall of the hollow cylinder. Multiple extrusion plates are fixedly connected to the front side of the outer wall of the hollow cylinder. Anti-slip pads are fixedly connected to the inner walls of the multiple extrusion plates. The same tightening sleeve is threadedly connected to the outer walls of the multiple extrusion plates. A fixing ring is fixedly connected to the front side of the outer wall of the telescopic rod. A branching assembly is provided at the bottom of the outer wall of the current transformer.

[0008] As a further description of the above technical solution: The positioning assembly includes multiple springs, and the opposite ends of the multiple positioning assemblies are respectively fixedly connected to the top of the inner wall of the corresponding wiring hole. Clamping plates are provided on the left and right sides of the inner wall of the multiple wiring holes, and the multiple clamping plates are respectively fixedly connected to the corresponding springs.

[0009] As a further description of the above technical solution: The branching assembly includes a wind wire plate, the rear side of which is fixedly connected to the bottom of the outer wall of the current transformer, and the top left and right sides of the wind wire plate are provided with wiring holes.

[0010] As a further description of the above technical solution: A protective cover is rotatably connected to the front side of the outer wall of the mounting plate, and an observation window is rotatably connected to the front side of the outer wall of the protective cover.

[0011] As a further description of the above technical solution: A handle is fixedly connected to the right side of the outer wall of the protective cover. An installation groove is provided on the rear side of the outer wall of the handle. A magnet is fixedly connected to the inner wall of the installation groove. A magnet is fixedly connected to the right side of the front end of the outer wall of the mounting plate.

[0012] As a further description of the above technical solution: The mounting plate has positioning grooves at all four corners of its outer wall, and the adjustment mechanism also includes positioning bolts.

[0013] As a further description of the above technical solution: The outer wall of the protective cover has multiple heat dissipation vents on the left side, and the spacing between the multiple heat dissipation vents is equal.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the stable clamping of the wire is achieved through the cooperation of the rotating handle, lead screw, mounting ear, conductive plate one, conductive plate two, and positioning component. Rotating the rotating handle drives the lead screw, causing conductive plate two to move to adjust the gap and facilitate wire insertion. Reverse rotation clamps the wire. The spring and clamping plate in the positioning component assist in positioning and clamping. This design improves upon the problem in the prior art where clamping is done solely by spring and conductive plate, which can affect circuit connection and safe operation due to weakened spring elasticity. This design enhances the reliability and stability of the wire connection.

[0015] 2. In this utility model, the adjustment mechanism and the wiring assembly work together to achieve significant benefits. The hollow cylinder and the telescopic rod are slidably connected, allowing for flexible length adjustment to meet different wiring requirements. The anti-slip pad on the inner wall of the extrusion plate works in conjunction with the tightening sleeve to firmly clamp the telescopic rod, ensuring the stability of the wire position. The fixing ring keeps the wire at the center point of the transformer, ensuring detection accuracy. The air wire plate of the wiring assembly separates different wires in an orderly manner through the wiring holes, achieving neat wiring, avoiding line chaos, and improving the overall practicality and reliability of the equipment. Attached Figure Description

[0016] Figure 1 This is a perspective view of a combined low-voltage circuit breaker proposed in this utility model; Figure 2 This is a front view of a combined low-voltage circuit breaker proposed in this utility model; Figure 3 This is a split view of a combined low-voltage circuit breaker proposed in this utility model; Figure 4 This is a split view of the adjustment mechanism of a combined low-voltage circuit breaker proposed in this utility model; Figure 5 This is a schematic diagram of the heat dissipation port of a combined low-voltage circuit breaker proposed in this utility model. Figure 6 This is a spring-split diagram of a combined low-voltage circuit breaker proposed in this utility model; Figure 7 This is a cross-sectional view of the mounting plate of a combined low-voltage circuit breaker proposed in this utility model. Figure 8 This is a schematic diagram of the clamping mechanism of a combined low-voltage circuit breaker proposed in this utility model.

[0017] Legend: 1. Mounting plate; 2. Clamping mechanism; 201. Conductive sheet one; 202. Slide groove; 203. Conductive sheet two; 204. Mounting ear; 205. Lead screw; 206. Rotating handle; 207. Positioning assembly; 2071. Spring; 2072. Clamping piece; 3. Adjusting mechanism; 301. Hollow cylinder; 302. Telescopic rod; 303. Extrusion piece; 304. Anti-slip pad; 305. Tightening sleeve; 306. Fixing ring; 307. Branching assembly; 3071. Air duct plate; 3072. Cable routing hole; 4. Circuit breaker; 5. Wiring hole; 6. Current transformer; 7. Protective cover; 8. Observation window; 9. Handle; 10. Mounting groove; 11. Magnet one; 12. Magnet two; 13. Positioning groove; 14. Positioning bolt; 15. Heat dissipation vent. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 6 , Figure 7 and Figure 8 This utility model provides an embodiment of a combined low-voltage circuit breaker, including a mounting plate 1, which serves as the basic support structure for the entire device and is used to fix and install other components. A circuit breaker 4 is fixedly connected to the bottom front side of the mounting plate 1, the core component for controlling circuit on / off and providing protection for the circuit. A wiring hole 5 is provided on the top of the circuit breaker 4 for connecting external wires to achieve circuit connection. A clamping mechanism 2 is provided on the inner wall of the wiring hole 5 to firmly clamp the wires, ensuring a reliable electrical connection between the wires and the circuit breaker 4. A current transformer 6 is fixedly connected to the top front side of the mounting plate 1, used to detect parameters such as current or voltage in the circuit, providing data support for circuit operation monitoring. An adjustment mechanism 3 is provided on the outer wall of the current transformer 6. The clamping mechanism 2 includes multiple conductive plates 201 that contact the wires and conduct current, forming a crucial part for achieving electrical connections. Each conductive plate 201 is fixedly connected to the left side of the inner wall of its corresponding wiring hole 5, providing fixation and conductive support for one side of the wire. Each wiring hole 5 has a groove 202 on its right side, providing a guide track for the movement of the conductive plate 203. Each groove 202 has a conductive plate 203 slidably connected to its inner wall, allowing it to move within the groove and clamp the wire in conjunction with the conductive plate 201. Each conductive plate 203 has a mounting lug 204 fixedly connected to its front outer wall, for connection to a lead screw 205, enabling movement control of the conductive plate 203. The lead screw 205 is rotatably connected to the inner wall of the circuit breaker 4; this threaded connection allows the rotation of the lead screw 205 to be precisely converted into linear movement of the conductive plate 203. Multiple mounting ears 204 are threadedly connected to the lead screw 205. A rotating handle 206 is fixedly connected to the right side of the outer wall of the lead screw 205, providing the operator with a convenient force-applying component for rotating the lead screw 205. A positioning component 207 is provided at the top of the inner wall of the wiring hole 5. The positioning assembly 207 includes multiple springs 2071, which are elastic and can provide a certain amount of buffering and auxiliary clamping force during wire insertion and clamping. The opposite ends of the multiple positioning assemblies 207 are respectively fixedly connected to the top of the inner wall of the corresponding wiring hole 5, fixing the springs 2071 to the top of the inner wall of the wiring hole 5. Clamping pieces 2072 are provided on the left and right sides of the inner wall of the multiple wiring holes 5. The clamping pieces 2072 contact the wire and clamp and position the wire under the action of the springs 2071. The multiple clamping pieces 2072 are respectively fixedly connected to the corresponding springs 2071, so that the elastic force of the springs 2071 can be transmitted to the clamping pieces 2072, realizing the clamping and positioning function of the wire. Specifically, within the clamping mechanism 2, multiple conductive plates 201 are fixed to the left side of the inner wall of the wiring hole 5, and work together with conductive plates 203 slidably connected in the right-side slide groove 202 to clamp the wire. The mounting lug 204 on the front side of conductive plate 203 is threadedly engaged with a lead screw 205 rotatably connected to the inner wall of the circuit breaker 4. Rotating the handle 206 at the right end of the lead screw 205 moves conductive plate 203 along the slide groove 202, adjusting the distance between it and conductive plate 201 to clamp or release the wire. In the positioning assembly 207, multiple springs 2071 are connected at one end to the top of the inner wall of the wiring hole 5 and at the other end to the clamping plate 2072. When the wire is inserted into the wiring hole 5, it squeezes the clamping plate 2072, causing the springs 2071 to deform under force, helping to initially position the wire and providing a certain buffer and auxiliary clamping force during the clamping process, ensuring the wire is securely connected between conductive plate 201 and conductive plate 203, achieving a reliable electrical connection.

[0020] Reference Figure 3 , Figure 4 and Figure 6The adjusting mechanism 3 includes a hollow cylinder 301, which serves as one of the main structures of the adjusting mechanism 3. Its function is to provide sliding space for the telescopic rod 302 and to connect with the current transformer 6. The rear end of the hollow cylinder 301 is fixedly connected to the top of the outer wall of the current transformer 6, thereby firmly installing the adjusting mechanism 3 on the current transformer 6 and ensuring the stability of the overall structure. The telescopic rod 302 is slidably connected to the inner wall of the hollow cylinder 301, and can slide axially within the hollow cylinder 301, thereby adjusting the relative position of the current transformer 6 and the external conductor. Multiple compression plates 303 are fixedly connected to the front side of the outer wall of the hollow cylinder 301 to apply pressure to the telescopic rod 302 and fix its position. Multiple extrusion plates 303 have anti-slip pads 304 fixedly connected to their inner walls, increasing the friction between the extrusion plates 303 and the telescopic rod 302 and preventing the telescopic rod 302 from slipping after adjustment. The outer walls of the multiple extrusion plates 303 are threadedly connected to the same tightening sleeve 305. Rotation of the tightening sleeve 305 allows the multiple extrusion plates 303 to move closer to or further away from the center, thereby adjusting the clamping degree on the telescopic rod 302. A fixing ring 306 is fixedly connected to the front side of the outer wall of the telescopic rod 302 for positioning the wires passing through the current transformer 6, ensuring the wires are centered within the current transformer 6. A wire distribution assembly 307 is provided at the bottom of the outer wall of the current transformer 6 to organize and separate the wires passing through the current transformer 6, facilitating wiring and management. The wire distribution assembly 307 includes a wire plate 3071 for installing the wiring holes 3072 and providing support and guidance for the wires. The rear side of the outer wall of the air wire plate 3071 is fixedly connected to the bottom of the outer wall of the current transformer 6, and the branching assembly 307 is securely installed on the current transformer 6, forming a complete wire adjustment and management structure together with the adjustment mechanism 3. Cable routing holes 3072 are provided on both the left and right sides of the top of the air wire plate 3071. Specifically, the rear end of the hollow cylinder 301 is fixed to the top of the outer wall of the current transformer 6, and its inner wall is slidably connected to the telescopic rod 302 to adjust the extension length of the telescopic rod 302. Multiple compression plates 303 on the front side of the outer wall of the hollow cylinder 301 have anti-slip pads 304 on their inner walls. These plates are threadedly connected to the tightening sleeve 305 to clamp or loosen the telescopic rod 302. When the tightening sleeve 305 is tightened, the compression plates 303, with the assistance of the anti-slip pads 304, hold the telescopic rod 302 tightly, fixing its position. The fixing ring 306 on the front side of the outer wall of the telescopic rod 302 keeps the wires passing through the current transformer 6 at the center point, ensuring the accuracy of the current transformer 6's detection. The branching assembly 307 at the bottom of the outer wall of the current transformer 6 has a wire plate 3071 fixed to the bottom of the outer wall of the current transformer 6. The wiring holes 3072 on the top left and right sides are used to pass different wires, making the wiring neat and orderly, facilitating line management.

[0021] Reference Figure 1 , Figure 2 and Figure 5A protective cover 7 is rotatably connected to the front side of the outer wall of the mounting plate 1. The protective cover 7 can rotate around the connection point with the mounting plate 1. Its function is to protect the circuit breaker 4, transformer 6, and other components installed on the front side of the mounting plate 1, preventing damage to the equipment from external object collisions, dust accumulation, etc. The front side of the outer wall of the protective cover 7 is rotatably connected to an observation window 8, which can rotate around the connection point with the protective cover 7. Its function is to allow the operator to observe the operating status of the internal equipment through the observation window 8 without opening the protective cover 7. A handle 9 is fixedly connected to the right side of the outer wall of the protective cover 7. The handle 9 provides an easy gripping structure for the operator to open or close the protective cover 7 more easily, facilitating the operation and maintenance of the equipment. A mounting groove 10 is opened on the rear side of the outer wall of the handle 9, and the handle is fixed to the inner wall of the mounting groove 10. Its function is to attract each other with the magnet 12 on the mounting plate 1, helping the protective cover 7 to remain tightly closed when closed, preventing the protective cover 7 from being accidentally opened. Magnet 11 is fixedly connected to the inner wall of the mounting groove 10, and magnet 212 is fixedly connected to the right side of the front end of the outer wall of the mounting plate 1. Magnet 212 and magnet 11 cooperate with each other and enhance the stability of the protective cover 7 when it is closed by magnetic attraction, so as to ensure that the protective cover 7 can effectively protect the internal equipment. Specifically, the protective cover 7, rotatably connected to the front of the mounting plate 1, protects components such as the circuit breaker 4 and the current transformer 6 from damage caused by external factors. The observation window 8, rotatably connected to the front of the protective cover 7, allows operators to observe the internal equipment's operating status without opening the cover 7. The handle 9 fixed to the right side of the protective cover 7 facilitates opening and closing. A magnet 11 fixed in the mounting groove 10 behind the handle 9 cooperates with a magnet 12 fixed to the front right side of the mounting plate 1. When the protective cover 7 is closed, magnetic attraction ensures its secure closure, preventing accidental opening.

[0022] Reference Figure 1 , Figure 2 and Figure 4 The mounting plate 1 has positioning grooves 13 at the four corners of its outer wall, and the adjustment mechanism 3 also includes positioning bolts 14; the protective cover 7 has multiple heat dissipation vents 15 on its left side, and the spacing between the multiple heat dissipation vents 15 is equal. Specifically, the positioning groove 13 at the corner of the mounting plate 1 cooperates with the positioning bolt 14 in the adjustment mechanism 3. The positioning groove 13 is used to cooperate with other components to provide a precise positional reference for the installation and positioning of the equipment, making it easy to accurately fix the mounting plate 1 in the designated position and accurately determine and fix the installation position of the adjustment mechanism 3, thereby enhancing structural stability. The heat dissipation vents 15 with equal spacing on the left side of the protective cover 7 can effectively dissipate the heat generated during equipment operation, ensuring that the equipment operates stably at a suitable temperature. They are used to dissipate heat during equipment operation, allowing the heat generated during operation to be dissipated to the external environment through the heat dissipation vents 15, preventing the equipment from being affected by overheating or damaged.

[0023] Working principle: First, when a wire needs to be connected, the operator rotates the handle 206. Since the lead screw 205 is threadedly connected to the mounting ear 204, rotating the handle 206 causes the lead screw 205 to rotate, which in turn causes the multiple mounting ears 204 to move the conductive plate 203 to the right along the slide groove 202. This increases the gap between the conductive plate 1 201 and the conductive plate 203, creating space for wire insertion. Then, the wire is inserted into the wiring hole 5. During wire insertion, the wire first contacts and presses against the two clamping plates 2072, causing the corresponding clamping plates 2072 to compress the spring 2071. As the wire continues to be inserted, it smoothly enters between the conductive plate 1 201 and the conductive plate 203. At this point, rotating the handle 206 in the opposite direction reverses the direction of the lead screw 205, causing the mounting ear 204 and the conductive plate 203 to move to the left, thereby gradually clamping the wire and fixing it in place. When passing the conductor through the current transformer 6, the operator first rotates the tightening sleeve 305 before the conductor passes through the current transformer 6. Since the tightening sleeve 305 is threadedly connected to multiple compression plates 303, rotation causes the tightening sleeve 305 to disengage from the compression plates 303. At this point, the compression plates 303 unfold due to the release of the restraint from the tightening sleeve 305, releasing the clamping force on the telescopic rod 302. Subsequently, the operator can move the telescopic rod 302 according to actual needs, adjusting its extension length within the hollow cylinder 301. Next, the conductor is passed through the center of the current transformer 6. During this process, the retaining ring 306 plays a crucial role, ensuring that the conductor is positioned at the center point of the current transformer 6, guaranteeing the accuracy of the current detection by the current transformer 6. After the conductor has passed through the current transformer 6 and been positioned correctly, the operator rotates the tightening sleeve 305 in the opposite direction. The tightening sleeve 305 is once again threaded onto multiple compression plates 303. As the tightening sleeve 305 tightens, the compression plates 303 gradually move closer to and clamp the telescopic rod 302, thereby fixing the position of the telescopic rod 302 and stabilizing the position of the conductor in the current transformer 6. Simultaneously, the wiring holes 3072 on the air wire plate 3071 in the wiring assembly 307 are used to pass through different conductors. In this way, different conductors pass through their corresponding wiring holes 3072, resulting in neat and orderly wiring, facilitating line management and maintenance.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined low-voltage circuit breaker, comprising a mounting plate (1), characterized in that: A circuit breaker (4) is fixedly connected to the bottom front side of the outer wall of the mounting plate (1). A wiring hole (5) is opened on the top of the circuit breaker (4). A clamping mechanism (2) is provided on the inner wall of the wiring hole (5). A current transformer (6) is fixedly connected to the top front side of the outer wall of the mounting plate (1). An adjustment mechanism (3) is provided on the outer wall of the current transformer (6). The clamping mechanism (2) includes multiple conductive plates (201), which are fixedly connected to the left side of the inner wall of the corresponding wiring hole (5). The right side of the inner wall of the multiple wiring holes (5) is provided with a sliding groove (202). The inner wall of the multiple sliding grooves (202) is slidably connected with conductive plates (203). The front side of the outer wall of the multiple conductive plates (203) is fixedly connected with mounting ears (204). The inner wall of the circuit breaker (4) is rotatably connected with a lead screw (205). The multiple mounting ears (204) are threadedly connected to the lead screw (205). The right side of the outer wall of the lead screw (205) is fixedly connected with a rotating handle (206). The top of the inner wall of the wiring hole (5) is provided with a positioning component (207).

2. A combined low-voltage circuit breaker according to claim 1, characterized in that: The adjustment mechanism (3) includes a hollow cylinder (301), the rear end of which is fixedly connected to the top of the outer wall of the current transformer (6), a telescopic rod (302) is slidably connected to the inner wall of the hollow cylinder (301), a plurality of extrusion plates (303) are fixedly connected to the front side of the outer wall of the hollow cylinder (301), anti-slip pads (304) are fixedly connected to the inner walls of the plurality of extrusion plates (303), the same tightening sleeve (305) is threadedly connected to the outer walls of the plurality of extrusion plates (303), a fixing ring (306) is fixedly connected to the front side of the outer wall of the telescopic rod (302), and a branching assembly (307) is provided at the bottom of the outer wall of the current transformer (6).

3. A combined low-voltage circuit breaker according to claim 1, characterized in that: The positioning component (207) includes multiple springs (2071). The opposite ends of the multiple positioning components (207) are respectively fixedly connected to the top of the inner wall of the corresponding wiring hole (5). Clamping pieces (2072) are provided on the left and right sides of the inner wall of the multiple wiring holes (5). The multiple clamping pieces (2072) are respectively fixedly connected to the corresponding springs (2071).

4. A combined low-voltage circuit breaker according to claim 2, characterized in that: The branch assembly (307) includes a wind wire plate (3071), the rear side of the outer wall of the wind wire plate (3071) is fixedly connected to the bottom of the outer wall of the current transformer (6), and the top left and right sides of the wind wire plate (3071) are provided with wiring holes (3072).

5. A combined low-voltage circuit breaker according to claim 1, characterized in that: The front side of the outer wall of the mounting plate (1) is rotatably connected to a protective cover (7), and the front side of the outer wall of the protective cover (7) is rotatably connected to an observation window (8).

6. A combined low-voltage circuit breaker according to claim 5, characterized in that: A handle (9) is fixedly connected to the right side of the outer wall of the protective cover (7). An installation groove (10) is provided on the rear side of the outer wall of the handle (9). A magnet (11) is fixedly connected to the inner wall of the installation groove (10). A magnet (12) is fixedly connected to the right side of the front end of the outer wall of the mounting plate (1).

7. A combined low-voltage circuit breaker according to claim 1, characterized in that: The mounting plate (1) has positioning grooves (13) at the four corners of its outer wall, and the adjustment mechanism (3) also includes positioning bolts (14).

8. A combined low-voltage circuit breaker according to claim 5, characterized in that: The outer wall of the protective cover (7) has multiple heat dissipation vents (15) on the left side, and the spacing between the multiple heat dissipation vents (15) is equal.

Images