Small reclosing circuit breaker

Abstract

The utility model discloses a miniature reclosing circuit breaker, which comprises at least one circuit breaker unit arranged side by side and a reclosing unit used for controlling opening and closing of the circuit breaker unit, and the circuit breaker unit comprises a shell, a wire inlet terminal and a moving contact. A current transformer is arranged in the circuit breaker unit, the wire inlet terminal is connected with the moving contact through a conductor, the conductor penetrates through the current transformer, a wiring hole is formed in the side face of the shell, a wire passing hole communicated with the wiring hole is formed in the side face of the reclosing unit, and a wire of the current transformer penetrates through the wiring hole and the wire passing hole to be electrically connected with a control module in the reclosing unit. The utility model has the following advantages and effects: the assembly is convenient, the debugging process of the bimetallic strip is saved, the production efficiency is improved, the circuit breaking is faster, and the practicability and generalizability are good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of circuit breaker, more specifically, it relates to a small reclosing circuit breaker. BACKGROUND

[0002] The small reclosing circuit breaker is an electrical device used to automatically cut off the current when an overload or short circuit occurs in the circuit to protect the safe operation of electrical equipment and circuit system. It has a reclosing function, that is, it can manually or automatically restore the power-on state after disconnecting the circuit. The patent application with the patent number CN202120250935.0 discloses a small reclosing overload release device. When an overload occurs in the power circuit (i.e. the main circuit), the bimetallic element bends and deforms to trip the circuit breaker. However, the bimetallic strip needs time to bend and deform due to heat, which causes the circuit breaker to fail to disconnect in time when an overload occurs. Moreover, during the factory delivery test of the small reclosing circuit breaker, a specific tool is required to adjust the bimetallic strip by turning the adjusting screw to make the small reclosing circuit breaker disconnect within the specified time range. This adjustment operation is complex and tedious, and requires specific personnel to operate, which affects production efficiency. SUMMARY

[0003] The utility model provides a small reclosing circuit breaker, which aims to solve the problem of delayed disconnection caused by the use of bimetallic strips for overload protection in existing small reclosing circuit breakers, and the problem of affecting production efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] The small reclosing circuit breaker of the utility model comprises at least one circuit breaker unit arranged side by side and a reclosing unit for controlling the opening and closing of the circuit breaker unit. The circuit breaker unit comprises a housing, a line-in terminal, and a moving contact. A current transformer is arranged in the circuit breaker unit. The line-in terminal and the moving contact are connected by a conductor. The conductor passes through the current transformer. The housing has a wire hole on the side surface. The reclosing unit has a wire passing hole on the side surface, which is in communication with the wire hole. The wires of the current transformer pass through the wire hole and the wire passing hole and are electrically connected to the control module in the reclosing unit.

[0006] The utility model is further provided with a slot on the surface of the housing, which is in communication with the wire hole. The slot penetrates the housing along the thickness direction of the housing.

[0007] The utility model is further provided with a cover plate on the housing, which closes the slot.

[0008] The utility model is further provided with the cover plate positioned in the slot. The length of the cover plate matches the thickness of the housing.

[0009] The utility model further sets up: the cover board and the casing are through the plug -in cooperation of plug -in groove and plug -in groove, the plug -in direction of plug -in groove and plug -in hole is the width direction of casing.

[0010] The utility model further sets up: the cover board one end is equipped with the plug -in hole, and the other end is equipped with the plug -in block, and the cover board between the adjacent two circuit breaker units is through the plug -in hole and the plug -in block and forms the plug -in cooperation.

[0011] The utility model further sets up: when the circuit breaker unit is multiple, the circuit breaker unit farthest from the reclosing unit is not equipped with the slot.

[0012] The utility model further sets up: the casing surface is equipped with the adhesive sticker, and the adhesive sticker is pasted in the slot.

[0013] The utility model has following effect: through setting the current transformer in the circuit breaker unit, and with the conductor of connecting incoming terminal and movable contact passes through the current transformer, and the current transformer is connected reclosing unit, so can through the current transformer real -time monitoring main loop current change, when the main loop occurs overload, through the reclosing unit control circuit breaker unit fast cut -off main loop, thereby reaches the protection purpose, adopt the scheme in the utility model can spare the bimetallic strip in the existing reclosing circuit breaker, and also spared the process of debugging bimetallic strip, is favorable for improving production efficiency, and the circuit breaks corresponding fast, has good use performance. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the perspective drawing of reclosing circuit breaker (not equipped with cover board) in the utility model;

[0015] Figure 2 It is the perspective drawing of cover board in the utility model;

[0016] Figure 3 It is the structural schematic view of circuit breaker unit in the utility model;

[0017] Figure 4 It is Figure 1 the enlarged view of A in the utility model;

[0018] Figure 5 It is the structural schematic view of circuit breaker unit and reclosing unit in the utility model.

[0019] In the drawing: 1, circuit breaker unit; 12, casing; 13, incoming terminal; 14, movable contact; 2, reclosing unit; 3, current transformer; 4, wiring hole; 41, wire hole; 5, slot; 6, cover board; 61, plug -in strip; 62, plug -in groove; 64, plug -in hole; 63, plug -in block. DETAILED DESCRIPTION

[0020] The technical solutions of the utility model will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the utility model, but not all. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0021] The utility model discloses a circuit breaker unit and a circuit breaker. Figures 1 to 5 The circuit breaker unit 1 comprises a shell 12, an incoming terminal 13 and a movable contact 14. A current transformer 3 is arranged in the circuit breaker unit 1. The incoming terminal 13 is connected to the movable contact 14 through a conductor (such as a flexible conductor). The conductor passes through the current transformer 3. A wiring hole 4 is formed in the side of the shell 12. A wire hole 41 is formed in the side of the reclosing unit 2 and communicates with the wiring hole 4. The conductor of the current transformer 3 passes through the wiring hole 4 and the wire hole 41 and is electrically connected to a control module in the reclosing unit 2. In actual application, the current transformer 3 is arranged to collect current signals to determine whether the main circuit is overloaded. Specifically, the current transformer 3 transmits signals to the reclosing unit 2. When the current transformer 3 detects that the main circuit is overloaded, the reclosing unit 2 controls the circuit breaker unit 1 to open, thereby realizing overload protection function. In this way, the bimetallic strip in the circuit breaker unit 1 can be omitted, and the process of adjusting the bimetallic strip during assembly of the circuit breaker is also omitted, which is beneficial to improve production efficiency and improve product performance.

[0022] The utility model discloses a circuit breaker unit and a circuit breaker. Figure 1 、 Figure 2 and Figure 4 A slot 5 is formed in the surface of the shell 12 and communicates with the wiring hole 4. The slot 5 penetrates the shell 12 along the thickness direction of the shell 12. The upper part of the wiring hole 4 is open through the slot 5. During assembly, the conductor connected to the current transformer 3 can be placed into the wiring hole 4 through the slot 5, thereby facilitating wiring and improving assembly convenience.

[0023] The utility model discloses a circuit breaker unit and a circuit breaker. Figure 2 and Figure 4In order to prevent dust and foreign matters from entering the slot 5, the cover plate 6 is arranged on the shell 12 to close the slot 5. The cover plate 6 is arranged in the slot 5 and the length of the cover plate 6 matches the thickness of the shell 12, so that the slot 5 is completely closed by the cover plate 6. The cover plate 6 and the shell 12 are connected by the plug-in cooperation of the plug strip 61 and the plug groove 62. The plug strip 61 is formed on the two sides of the cover plate 6, and the plug groove 62 is formed on the side wall of the slot 5. The plug strip 61 is inserted into the plug groove 62 along the width direction of the shell 12, so that the gap between the cover plate 6 and the slot 5 is closed, and the cover plate 6 can be quickly and reliably installed. As a variant, the plug strip 61 can be arranged on the side wall of the slot 5, and the plug groove 62 can be arranged on the side of the cover plate 6.

[0024] Further, the plug hole 64 is arranged at one end of the cover plate 6, and the plug block 63 is arranged at the other end. The cover plates 6 on the adjacent circuit breaker units 1 are connected by the plug hole 64 and the plug block 63, so that the structure is more compact, and the gap between the adjacent cover plates 6 is closed.

[0025] Referring to the drawings Figure 5 When the circuit breaker units 1 are multiple, the slot 5 is not arranged on the circuit breaker unit 1 farthest from the reclosing unit 2. The lead of the current transformer 3 in the circuit breaker unit 1 is directly led out from the side wiring hole 4.

[0026] As another embodiment of the utility model, the cover plate 6 is not arranged at the slot 5, and the slot 5 is closed by the adhesive sticker on the outer surface of the shell 12, so that the manufacturing cost is reduced.

[0027] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications without creative contribution according to the needs after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, the modifications are protected by the patent law.

Claims

1. A small-sized reclosing circuit breaker comprising at least one circuit breaker unit (1) and a reclosing unit (2) for controlling the opening and closing of the circuit breaker unit (1) arranged side by side, the circuit breaker unit (1) comprising a housing (12), a line-in terminal (13) and a movable contact (14); characterized in that: The circuit breaker unit (1) is provided with a current transformer (3), the incoming terminal (13) and the movable contact (14) are connected through a conductor, the conductor passes through the current transformer (3), the shell (12) is provided with a wire hole (4) on the side, the reclosing unit (2) is provided with a wire passing hole (41) communicated with the wire hole (4), the wire of the current transformer (3) passes through the wire hole (4) and the wire passing hole (41) and is electrically connected with the control module in the reclosing unit (2).

2. A compact reclosing circuit breaker according to claim 1, characterized in that: The shell (12) is provided with a slot (5) communicated with the wire hole (4), and the slot (5) penetrates the shell (12) along the thickness direction of the shell (12).

3. A compact reclosing circuit breaker according to claim 2, characterized in that: The shell (12) is provided with a cover plate (6) closing the slot (5).

4. A compact reclosing circuit breaker according to claim 3, characterized in that: The cover plate (6) is positioned in the slot (5), and the length of the cover plate (6) matches the thickness of the shell (12).

5. A compact reclosing circuit breaker according to claim 4, characterized in that: The cover plate (6) and the shell (12) are connected through the plug strip (61) and the plug groove (62), and the plug direction of the plug strip (61) and the plug hole (64) is the width direction of the shell (12).

6. A compact reclosing circuit breaker according to claim 3, characterized in that: One end of the cover plate (6) is provided with a plug hole (64), and the other end is provided with a plug block (63), and the cover plates (6) on the adjacent two circuit breaker units (1) are connected through the plug hole (64) and the plug block (63).

7. A compact reclosing circuit breaker according to claim 2, characterized in that: When the circuit breaker unit (1) is multiple, the farthest one from the reclosing unit (2) is not provided with the slot (5).

8. A compact reclosing circuit breaker according to claim 2, characterized in that: The surface of the shell (12) is provided with a sticker, and the sticker is attached to the slot (5).

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