Current-adjustable open-phase alarm molded case circuit breaker

Abstract

The utility model discloses a current-adjustable open-phase alarm molded case circuit breaker, which is provided with a first shell, a second shell is arranged on the back surface of the first shell, a movable rod penetrates through the back surface of the second shell, a protective cover is pasted on the back surface of the second shell, and thermomagnetic trips are arranged in the first shell and the second shell; fixing grooves are formed in the side faces of the tops and the bottoms of the first shell and the second shell, locking mechanisms are arranged on the inner sides of the fixing grooves, and the locking mechanisms are used for rapidly locking the first shell and the second shell. The current-adjustable open-phase alarm molded case circuit breaker combines the overload protection characteristic and the adjustable rated current function of the thermomagnetic release, and is suitable for the situation that protection setting needs to be adjusted according to load changes, for example, in industrial application or commercial buildings, the load may change due to equipment replacement or upgrade.

Description

Technical Field

[0001] The utility model relates to the technical field of molded case circuit breakers, in particular to a molded case circuit breaker with adjustable current and open-phase alarm. Background Technique

[0002] The molded case circuit breaker can automatically cut off the current when the current exceeds the tripping setting. The outer shell of the circuit breaker uses a plastic insulator to isolate between conductors and the grounded metal part. The molded case circuit breaker usually contains a thermal-magnetic tripping unit, and large-sized molded case circuit breakers are equipped with solid-state tripping sensors. For example, a new type of intelligent molded case circuit breaker with open-phase protection function for broken neutral, disclosed in CN106229224B, includes a switch base and a switch cover. The switch base is divided into three areas, namely a strong voltage area connected to the main circuit, a current signal acquisition and installation area for installing a zero-sequence current transformer and a current transformer, and a weak voltage installation area for voltage signal acquisition. The weak current control part and the release are installed on the controller mounting seat. The controller mounting seat is located directly above the current signal acquisition and installation area and the weak voltage installation area for voltage signal acquisition, and is completely separated from the strong current part, without affecting each other, with higher measurement accuracy and better safety performance. However, the new type of intelligent molded case circuit breaker with open-phase protection function for broken neutral still has the following disadvantages in actual use:

[0003] For traditional circuit breakers, the two outer shells are connected by bolts. This not only makes the operation cumbersome, but also is not conducive to quick disassembly and assembly. Moreover, the bolt connection method is likely to damage the position of the screw holes, affecting the sealing performance after the outer shells are spliced. In view of the above problems, it is urgent to innovate and design on the basis of the original molded case circuit breaker. Content of the Utility Model

[0004] The purpose of the utility model is to provide a molded case circuit breaker with adjustable current and open-phase alarm, so as to solve the problem in the above background technique that for traditional circuit breakers, the two outer shells are connected by bolts, which not only makes the operation cumbersome, but also is not conducive to quick disassembly and assembly, and the bolt connection method is likely to damage the position of the screw holes, affecting the sealing performance after the outer shells are spliced.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A molded case circuit breaker with adjustable current and open-phase alarm is provided with a first outer shell. The back of the first outer shell is provided with a second outer shell, and a movable rod penetrates through the back of the second outer shell. Moreover, a protective cover is pasted on the back of the second outer shell. A thermal-magnetic release is installed inside the first outer shell and the second outer shell.

[0006] It further includes: Fixing grooves are respectively arranged on the top, bottom and side surfaces of the first outer shell and the second outer shell, and a locking mechanism is arranged inside the fixing grooves. The locking mechanism is used for quickly locking between the first outer shell and the second outer shell.

[0007] Preferably, the movable rod and the second housing are slidably connected, and the movable rods are evenly distributed on the second housing, and a spring for resetting is wound around the movable rod. The protective cover is made of rubber and is arranged through the movable rod, which facilitates the back surface of the circuit breaker to fit with the uneven wall.

[0008] Preferably, the locking mechanism includes a movable cylinder fitted inside the fixing groove, and adjusting rods penetrate through both ends of the movable cylinder, and the cross-section of the adjusting rod is in a "Z" shape. When pressing the adjusting rods at both ends of the movable cylinder, the adjusting rods can be driven to slide on the movable cylinder.

[0009] Preferably, through grooves are formed in the movable cylinder on the outer side of the adjusting rod, and the adjusting rod and the movable cylinder form a sliding structure through the through grooves, and a spring for resetting is wound around the outer side of the adjusting rod. After the adjusting rod moves, the distance can be changed so as to be connected with the limiting hole.

[0010] Preferably, the end of the adjusting rod and the limiting hole are snap-connected, and the limiting holes are provided on both the first housing and the second housing. After the adjusting rod is snap-connected with the limiting hole, the movable cylinder can be stably located in the fixing groove through the elasticity of the spring.

[0011] Preferably, fixing cavities are formed on the sides of both the first housing and the second housing, a limiting plate is arranged inside the fixing cavity, and a spring is arranged between the limiting plate and the fixing cavity. After pushing the limiting plate to slide in the fixing cavity, it is convenient to take out or install the movable cylinder from the fixing groove.

[0012] Preferably, the limiting plate is slidably connected with both the first housing and the second housing through the fixing cavity, the cross-section of the limiting plate is in an arc shape, and the limiting plate and the fixing groove form a circular structure. When the limiting plate closes outside the fixing groove, the position of the movable cylinder can be restricted.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The current-adjustable open-phase alarm molded case circuit breaker combines the overload protection characteristics of the thermal magnetic release and the function of adjustable rated current, and is applicable to situations where the protection settings need to be adjusted according to the load changes. For example, in industrial applications or commercial buildings, the load may change due to equipment replacement or upgrade. The specific content is as follows:

[0014] 1. Press the adjusting rods at both ends of the movable cylinder. When the adjusting rods move to be opposite to the limiting holes, snap-fit and install the movable cylinder in the fixing groove so that the adjusting rods can pass through the limiting holes. In this way, through the resilience of the spring, the two adjusting rods can be stably clamped in the limiting holes, and the stability of the movable cylinder in the fixing groove can be ensured. Then release the pushing force on the limiting plate, and the limiting plate can be driven by the resilience of the spring to close the fixing groove, further ensuring the stability of the position of the movable cylinder;

[0015] 2. Install the assembled circuit breaker against the wall. According to the unevenness of the wall, the movable rod can be pushed to slide outside the second shell. The elasticity of the spring can drive the movable rod to contact the wall, thereby ensuring the full fit between the protective cover and the wall and ensuring the stability of the circuit breaker after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the side section structure of the second housing of the utility model;

[0018] Figure 3 This is a side view of the structure of the fixing groove of the utility model;

[0019] Figure 4 This is a schematic diagram of the rear view structure of the limit plate of the utility model;

[0020] Figure 5 This is a side view of the structure of the movable cylinder of the utility model;

[0021] Figure 6 It is a schematic diagram of the side section structure of the movable cylinder of the utility model.

[0022] In the figure: 1. first shell; 2. second shell; 3. movable rod; 4. protective cover; 5. fixing groove; 6. movable cylinder; 7. adjusting rod; 8. through groove; 9. limiting hole; 10. fixing cavity; 11. limiting plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1-6 , the utility model provides a technical solution:

[0025] In order to solve the problems existing in the prior art, therefore, in this embodiment, through the following technical solution, a molded case circuit breaker with adjustable current and open-phase alarm is provided with a first housing 1. A second housing 2 is installed on the back of the first housing 1, and a movable rod 3 penetrates through the back of the second housing 2. Moreover, a protective cover 4 is pasted on the back of the second housing 2. A thermal-magnetic release is installed inside the first housing 1 and the second housing 2. It further includes: fixing grooves 5 are respectively formed on the top and bottom sides of the first housing 1 and the second housing 2, and a locking mechanism is arranged inside the fixing grooves 5. The locking mechanism is used for quickly locking between the first housing 1 and the second housing 2.

[0026] In the existing circuit breaker, the two outer shells are connected by bolts. This not only makes the operation cumbersome, but also is not conducive to quick disassembly and assembly. Moreover, the bolt connection method is likely to damage the position of the screw holes, affecting the sealing performance after the outer shells are spliced. The movable rod 3 and the second outer shell 2 are slidably connected, and the movable rods 3 are evenly distributed on the second outer shell 2. And a spring for resetting is wound around the movable rod 3. The protective cover 4 is made of rubber. The locking mechanism includes a movable cylinder 6 fitted inside the fixed groove 5. And adjusting rods 7 penetrate through both ends of the movable cylinder 6. And the cross section of the adjusting rod 7 is a "Z" - shaped structure. A through - groove 8 is formed in the movable cylinder 6 on the outer side of the adjusting rod 7. And the adjusting rod 7 and the movable cylinder 6 form a sliding structure through the through - groove 8. And a spring for resetting is wound around the outer side of the adjusting rod 7. The end of the adjusting rod 7 is snap - connected to the limit hole 9. And the limit holes 9 are provided on both the first outer shell 1 and the second outer shell 2. Fixed cavities 10 are formed on the sides of both the first outer shell 1 and the second outer shell 2. And a limit plate 11 is arranged inside the fixed cavity 10. And a spring is arranged between the limit plate 11 and the fixed cavity 10. The limit plate 11 is slidably connected to both the first outer shell 1 and the second outer shell 2 through the fixed cavity 10. And the cross section of the limit plate 11 is arc - shaped. And the limit plate 11 and the fixed groove 5 form a circular structure. First, splice the first outer shell 1 and the second outer shell 2. Then push the limit plate 11 to slide in the fixed cavity 10 to make the fixed groove 5 in an open state. Press the adjusting rods 7 at both ends of the movable cylinder 6 to drive the adjusting rods 7 to slide in the through - groove 8. When the adjusting rod 7 moves to be opposite to the limit hole 9, then snap - install the movable cylinder 6 in the fixed groove 5 so that the adjusting rod 7 can pass through the limit hole 9. In this way, through the resilience of the spring, the two adjusting rods 7 can be driven to stably snap into the limit holes 9 and ensure the stability of the movable cylinder 6 in the fixed groove 5, realizing the locking of the first outer shell 1 and the second outer shell 2, and the operation is convenient. Then release the push on the limit plate 11. Through the resilience of the spring, the limit plate 11 can be driven to close the fixed groove 5, further ensuring the stability of the position of the movable cylinder 6. Then fit and install the assembled circuit breaker to the wall. According to the unevenness of the wall, the movable rod 3 can be pushed to slide on the outer side of the second outer shell 2. Through the elasticity of the spring, the movable rod 3 can be driven to abut against the wall. In this way, through the sliding of the movable rod 3, it can be ensured that the protective cover 4 is fully fitted with the wall, ensuring the stability of the circuit breaker after installation.

[0027] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent substitution on some of the technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A current-adjustable open-phase alarm molded case circuit breaker is provided with a first housing (1). A second housing (2) is installed on the back of the first housing (1). A movable rod (3) penetrates through the back of the second housing (2). And a protective cover (4) is pasted on the back of the second housing (2). A thermal-magnetic release is installed inside the first housing (1) and the second housing (2). It is characterized in that It further includes: Fixing grooves (5) are formed on the top and bottom sides of the first housing (1) and the second housing (2). And a locking mechanism is arranged inside the fixing grooves (5). The locking mechanism is used for quickly locking between the first housing (1) and the second housing (2).

2. The adjustable-current single-phase-failure-alarm molded case circuit breaker according to claim 1, wherein: The movable rod (3) is slidably connected to the second housing (2). The movable rods (3) are evenly distributed on the second housing (2). And a spring for resetting is wound on the movable rod (3). The protective cover (4) is made of rubber.

3. The adjustable-current single-phase-failure-alarm molded case circuit breaker according to claim 1, wherein: The locking mechanism includes a movable cylinder (6) fittingly arranged inside the fixing groove (5). Adjusting rods (7) penetrate through both ends of the movable cylinder (6). And the cross-section of the adjusting rod (7) is in a "Z" shape structure.

4. An adjustable-current and open-phase-alarm molded case circuit breaker according to claim 3, characterized in that: Through grooves (8) are formed on the movable cylinder (6) on the outer side of the adjusting rod (7). The adjusting rod (7) and the movable cylinder (6) form a sliding structure through the through grooves (8). And a spring for resetting is wound on the outer side of the adjusting rod (7).

5. The adjustable-current and open-phase-alarm molded case circuit breaker according to claim 4, wherein: The end of the adjusting rod (7) is snap-connected to a limit hole (9). And the limit holes (9) are provided on both the first housing (1) and the second housing (2).

6. The adjustable-current and open-phase-alarm molded case circuit breaker according to claim 5, wherein: Fixing cavities (10) are formed on the sides of the first housing (1) and the second housing (2). And a limiting plate (11) is arranged inside the fixing cavities (10). And a spring is arranged between the limiting plate (11) and the fixing cavity (10).

7. An adjustable-current and open-phase-alarm molded case circuit breaker according to claim 6, characterized in that: The limiting plate (11) is slidably connected to both the first housing (1) and the second housing (2) through the fixing cavities (10). The cross-section of the limiting plate (11) is in an arc shape structure. And the limiting plate (11) and the fixing groove (5) form a circular structure.

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