A reverse connection compatible functional module and circuit breaker

Abstract

A reverse connection compatible functional module and circuit breaker, comprising: a rack, a built-in mounting space, having at least one first wiring end electrically connected to a load end and at least one second wiring end connected to a control circuit board of the circuit breaker; a handle rotatably arranged in the mounting space; a tripping mechanism arranged in the mounting space; a first operating mechanism arranged in linkage with the handle and corresponding to the tripping mechanism, the first operating mechanism being configured to be able to realize synchronous linkage with a second operating mechanism of the circuit breaker; and a switch assembly arranged in linkage with the first operating mechanism and being controllable to realize conduction or disconnection between the first wiring end and the second wiring end. By arranging the switch assembly for on-off control of the power supply loop at the load end, which can be controlled by the first operating mechanism, whether the power supply is correctly connected or reversely connected, when the tripping mechanism acts, the load end and the power supply can be electrically isolated by disconnecting the switch assembly.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a reverse-connection compatible functional module and circuit breaker. Background Technology

[0002] Existing single-phase or three-phase circuit breakers with power electronic functions, such as residual current detection, fault arc detection, overvoltage detection, and undervoltage detection, must have their terminals marked with incoming / outgoing lines or power supply / load terminals. This is because the circuit board inside the circuit breaker usually draws power from the outgoing or load terminals, and when the circuit breaker trips, the power supply lines on the circuit board also lose power as the main contacts disconnect.

[0003] However, if the circuit breaker is reversed due to human error, the incoming / outgoing lines or the power / load side will be connected in reverse. When the circuit breaker is tripped, the circuit board's take-off line will still be connected to the feeder line and will be at a high potential. Even if the moving contact disconnects the line, the circuit board will still be energized. If the circuit board is kept energized, the trip coil will burn out quickly. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a reverse-connection compatible functional module and circuit breaker.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A reverse-connection compatible functional module, comprising: The rack has a built-in installation space and has at least one first terminal that is electrically connected to the load and at least one second terminal that is connected to the control circuit board of the circuit breaker. The handle is rotatably mounted within the installation space; A tripping mechanism is provided within the installation space; The first operating mechanism is linked to the handle and corresponding to the tripping mechanism. The first operating mechanism is configured to be able to synchronously link with the second operating mechanism of the circuit breaker. The switch assembly is linked to the first operating mechanism and can be controlled to enable or disable the connection between the first terminal and the second terminal. The first operating mechanism controls the switching assembly to be turned on and off. When the tripping mechanism is activated, it drives the first operating mechanism to switch the switching assembly from the on state to the off state.

[0006] The first operating mechanism includes a locking latch and a contact support that cooperate with each other, and the switch assembly is a moving contact that is fixedly mounted on the contact support.

[0007] The locking portion extends to the actuating front end of the release mechanism, forming the release end.

[0008] The lower end of the contact support is provided with at least one contact mounting part with a slot, and the moving contact is inserted into the slot.

[0009] One end of the moving contact is bent in the opposite direction to form a wiring portion that is electrically connected to the first terminal, and the connection between the two forms a plug-in portion that can be inserted into the slot.

[0010] The connector has a buckle on one or both sides.

[0011] There are multiple contact mounting parts, and a baffle is provided between each contact mounting part.

[0012] The frame is provided with several stacked partitions, and the adjacent partitions form independent moving contact spaces.

[0013] A circuit breaker, wherein the circuit breaker has a reverse-connection compatible functional module provided inside or outside, and the first operating mechanism of the reverse-connection compatible functional module is mechanically coupled to the second operating mechanism of the circuit breaker to achieve synchronous operation. The second operating mechanism controls the on / off state of the power input terminal, and the first operating mechanism controls the on / off state of the load terminal, forming a double-breakpoint structure; When the power line is reversed, the disconnection of the switch assembly can independently cut off the power supply path to the load side when the tripping mechanism of the reverse-connection compatible functional module is triggered.

[0014] The circuit breaker is also equipped with an experimental component, one end of which is connected to the power supply terminal and the other end of which is connected to the control circuit board.

[0015] The beneficial effects of this utility model are as follows: By setting a switch assembly for controlling the on / off state of the power circuit at the load end, which can be controlled by the first operating mechanism, the load end and the power supply can be electrically isolated by disconnecting the switch assembly when the tripping mechanism is activated, regardless of whether the power supply is correctly wired or reversed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the reverse-connection compatible functional module applied to the leakage current module in this utility model.

[0017] Figure 2 This is a schematic diagram of the structure combined with a circuit breaker.

[0018] Figure 3 The main view shows the function module for reverse connection compatibility applied in the leakage current module.

[0019] Figure 4 This is an internal diagram of a function module designed for reverse connection compatibility.

[0020] Figure 5A schematic diagram of the functional module structure for reverse connection compatibility.

[0021] Figure 6 This is a schematic diagram of the structure supporting the contact.

[0022] Figure 7 This is a schematic diagram of the moving contact.

[0023] Figure 8 This is a schematic diagram illustrating the principle of this utility model. Detailed Implementation

[0024] 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.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] like Figure 3 and Figure 4 As shown, this utility model discloses a reverse-connection compatible functional module, which includes a frame 110 and a handle 120, a tripping mechanism 130, a first operating mechanism 140, and a switch assembly 150 disposed within the frame 110. The handle drives the first operating mechanism, and the tripping mechanism also acts as a driving source, driving the first operating mechanism 140 to operate. The first operating mechanism then drives the switch assembly to operate, realizing the connection and disconnection of the power supply circuit at the load end. Combined with the circuit breaker's own on / off circuit located at the power supply end, a bidirectional on / off circuit design is achieved. Regardless of whether the power supply is correctly or reversed, when the tripping mechanism operates or the first operating mechanism is disconnected, the switch assembly can be disconnected to ensure electrical isolation between the load end and the power supply. The specific principle is as follows: Figure 8 As shown. The frame 110 includes a frame base and a frame cover plate, which are assembled to form an installation space. It has at least one first terminal 111 that is electrically connected to the load end and at least one second terminal 112 that is connected to the control circuit board of the circuit breaker. The number of the first terminal and the second terminal is determined according to the number of phases of the circuit breaker.

[0027] The handle 120 is rotatably disposed within the installation space. It is connected to the first operating mechanism via a pull rod. That is, relative movement of the handle will drive the first operating mechanism to close or open the circuit.

[0028] The tripping mechanism 130 is located in the installation space. The tripping mechanism adopts a tripping device commonly used in the circuit breaker field. It is mainly used to generate a tripping action, which drives the first operating mechanism 140 to operate, thereby realizing the tripping.

[0029] The first operating mechanism 140 is linked to the handle 120 and corresponding to the tripping mechanism 130. The first operating mechanism 140 is configured to achieve synchronous linkage with the second operating mechanism of the circuit breaker 300. That is, the first operating mechanism is connected to the second operating mechanism of the circuit breaker it is coupled with, so the two can act synchronously. Therefore, when the first operating mechanism operates the switch assembly to disconnect, the second operating mechanism causes the circuit breaker to be in the open state.

[0030] The switch assembly 150 is linked to the first operating mechanism 140 and can be controlled to realize the connection or disconnection between the first terminal 111 and the second terminal 112. In this embodiment, the switch assembly 150 is a moving contact. In other embodiments, a tactile switch or other structure can also be used, as long as it can be driven by the first operating mechanism to realize the circuit connection or disconnection.

[0031] The first operating mechanism 140 controls the switching assembly 150 to be turned on and off. When the tripping mechanism 130 is activated, it drives the first operating mechanism 140 to switch the switching assembly 150 from the on state to the off state.

[0032] The first operating mechanism 140 includes a locking latch 141 and a contact support 142 that cooperate with each other, and is fixedly mounted on the contact support 142. The locking latch and the contact support are rotatably mounted, and the moving contact is mounted and fixed on the contact support. It can rotate with the contact support and change between being on and off. The second terminal is directly welded and fixed to the moving contact, and preferably an arc-starting plate is provided on its rear side.

[0033] The latch 141 extends to the actuating front end of the tripping mechanism 130, forming a tripping end 143. When the tripping mechanism strikes the tripping end, it releases the locking state between the latch and the contact support, and the contact support disconnects under the action of the contact torsion spring.

[0034] like Figure 6 As shown, the lower end of the contact support 142 is provided with at least one contact mounting part 144 having a slot 146, and the moving contact is inserted into the slot 146.

[0035] like Figure 7As shown, one end of the moving contact is bent in the opposite direction to form a wiring portion 151 that is electrically connected to the first terminal, and the connection between the two forms a plug-in portion 152 that can be inserted into the slot 146. A buckle 153 is provided on either side or both sides of the plug-in portion 152. Fixing is achieved through plugging, allowing for rapid installation.

[0036] There are multiple contact mounting parts 144, and each contact mounting part 144 is provided with a baffle 145 to isolate the circuit between each phase line and prevent short circuit.

[0037] like Figure 5 As shown, the frame 110 is provided with a number of stacked partitions 147, and the adjacent partitions 147 form independent moving contact movement spaces. Each moving contact is isolated by multiple mutually isolated moving contact movement spaces.

[0038] like Figure 1 and Figure 2 As shown, this utility model also discloses a circuit breaker, wherein the circuit breaker is provided with the above-mentioned reverse connection compatible functional module 100 inside or outside, and the first operating mechanism of the reverse connection compatible functional module 100 is mechanically coupled with the second operating mechanism of the circuit breaker to achieve synchronous operation. The functional module can be installed inside the circuit breaker, and its first operating mechanism and the second operating mechanism of the circuit breaker are mechanically coupled through a connecting rod or other structure to achieve synchronous operation.

[0039] The second operating mechanism controls the on / off state of the power input terminal, and the first operating mechanism controls the on / off state of the load terminal, forming a double-breakpoint structure; When the power line is reversed, the tripping mechanism of the reverse-connection compatible functional module 100 is triggered, and the disconnection of the switch assembly can independently cut off the power path to the load.

[0040] In this embodiment, the functional module is integrated into the leakage current module, and the entire leakage current module is connected to the circuit breaker.

[0041] The circuit breaker is also equipped with an experimental component 200, one end of which is connected to the power supply terminal and the other end of which is connected to the control circuit board. It is used to periodically test whether the tripping function is normal.

[0042] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A reverse-connection compatible functional module, characterized in that: It includes: The rack (110) has a built-in installation space and has at least one first terminal (111) electrically connected to the load end and at least one second terminal (112) electrically connected to the control circuit board of the circuit breaker. The handle (120) is rotatably disposed within the mounting space; A tripping mechanism (130) is disposed within the installation space; The first operating mechanism (140) is linked to the handle (120) and corresponding to the tripping mechanism (130). The first operating mechanism (140) is configured to be able to synchronously link with the second operating mechanism of the circuit breaker. The switch assembly (150) is linked to the first operating mechanism (140) and can be controlled to realize the connection or disconnection between the first terminal (111) and the second terminal (112); The first operating mechanism (140) controls the on and off states of the switch assembly (150). When the tripping mechanism (130) is activated, it drives the first operating mechanism (140) to switch the switch assembly (150) from the on state to the off state.

2. The reverse-connection compatible functional module according to claim 1, characterized in that: The first operating mechanism (140) includes a latch (141) and a contact support (142) that cooperate with each other. The switch assembly (150) is a moving contact and is fixedly mounted on the contact support (142).

3. The reverse-connection compatible functional module according to claim 2, characterized in that: The latch (141) extends to the actuating front end of the release mechanism (130) to form the release end (143).

4. A reverse-connection compatible functional module according to claim 2 or 3, characterized in that: The lower end of the contact support (142) is provided with at least one contact mounting part (144) having a slot (146), and the moving contact is inserted into the slot (146).

5. A reverse-connection compatible functional module according to claim 4, characterized in that: One end of the moving contact is bent in the opposite direction to form a wiring portion (151) that is electrically connected to the first terminal, and the connection between the two forms a plug portion (152) that can be inserted into the slot (146).

6. A reverse-connection compatible functional module according to claim 5, characterized in that: The plug-in portion (152) is provided with a buckle (153) on one or both sides.

7. A reverse-connection compatible functional module according to claim 4, characterized in that: There are multiple contact mounting parts (144), and a baffle (145) is provided between each contact mounting part (144).

8. A reverse-connection compatible functional module according to claim 7, characterized in that: The frame (110) is provided with several stacked partitions (147), and the adjacent partitions (147) form independent moving contact movement spaces.

9. A circuit breaker, characterized in that: The circuit breaker is provided with a reverse connection compatible functional module (100) as described in any one of claims 1 to 8 on its interior or exterior, and the first operating mechanism of the reverse connection compatible functional module (100) is mechanically coupled with the second operating mechanism of the circuit breaker to achieve synchronous operation. The second operating mechanism controls the on / off state of the power input terminal, and the first operating mechanism controls the on / off state of the load terminal, forming a double-breakpoint structure; When the power line is reversed, the disconnection of the switch assembly can independently cut off the power supply path at the load end when the tripping mechanism of the reverse-connection compatible functional module (100) is triggered.

10. A circuit breaker according to claim 9, characterized in that: The circuit breaker is also provided with an experimental component (200), one end of which is connected to the power supply terminal and the other end of which is connected to the control circuit board.

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