An electrical leakage tripping device assembly

Abstract

The utility model relates to the technical field of release, concretely is a kind of electric leakage release assembly, the utility model includes release support, static core, coil and moving iron core are arranged in release support inside, static core and moving iron core are respectively located at the both ends of coil, one end of release support is fixedly connected with shaft body, pull rod is rotatably installed on shaft body, moving iron core is used to pull pull rod rotation, white area and red area are provided on the upper end of pull rod, torsional spring is sleeved on shaft body, one end of torsional spring is abutted with release support, and the other end is connected with pull rod;By setting the pull rod with white area and red area, and the rotating position of pull rod is linked with release state, mechanical double-color indication is realized, after electric leakage tripping, pull rod rotates, the position of white area and red area is changed, the color change observed through the observation port of circuit breaker shell is indicated eye-catching, greatly facilitates user and maintenance personnel to identify fault type quickly, improves the troubleshooting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of trip units, specifically a leakage current trip unit assembly. Background Technology

[0002] Circuit breakers are crucial protective electrical devices in low-voltage power distribution systems, used to automatically disconnect circuits when faults occur. Residual current devices (RCDs) or circuit breakers with residual current protection further enhance electrical safety by adding detection and protection against ground fault current (leakage current).

[0003] The residual current device (RCD) is the core component for residual current protection. Traditional RCDs typically consist of a coil, an iron core, and a tripping rod. When a leakage current is detected, the coil is energized to generate a magnetic field, which drives the iron core to strike the tripping rod, thereby tripping the circuit breaker. However, there are some common problems in the existing technology: there is a lack of clear and intuitive status indication after the tripping action. Users or maintenance personnel find it difficult to quickly observe the status of the RCD, which brings inconvenience to troubleshooting. Therefore, an RCD assembly is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a leakage current trip unit assembly to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A residual current circuit breaker assembly includes a trip unit bracket. The trip unit bracket contains a stationary iron core, a coil, and a moving iron core, located at opposite ends of the coil. A shaft is fixed to one end of the trip unit bracket, and a pull rod is rotatably mounted on the shaft. The moving iron core is used to pull the pull rod to rotate. The upper end of the pull rod has a white area and a red area. A torsion spring is sleeved on the shaft, with one end abutting against the trip unit bracket and the other end engaging with the pull rod. A retaining plate is rotatably mounted on one side of the trip unit bracket, with its end engaging with one side of the pull rod. A compression spring is provided between the retaining plate and the trip unit bracket.

[0007] Preferably, one end of the trip unit bracket is fixedly connected to a bearing seat, the rotating shaft is fixedly connected to the bearing seat, the lower end of the pull rod is rotatably installed with the shaft body, a bayonet is opened in the middle of the pull rod, and the end of the moving iron core is engaged with the bayonet.

[0008] Preferably, a fixing block one is fixedly connected to one side of the pull rod, and a fixing block two is fixedly connected to the end of the card plate, with the fixing block two engaging with the fixing block one.

[0009] Preferably, a circular groove is provided on one side of the trip unit bracket, one end of the compression spring is fixedly connected to the circular groove, and the other end is fixedly connected to the card plate.

[0010] Preferably, a limiting block is fixedly connected to the lower end of the pull rod, and the limiting block abuts against the shaft seat.

[0011] Preferably, a protrusion is fixedly connected to one side of the trip unit bracket, and a through groove is provided on the card plate, with the protrusion and the through groove being inserted into each other.

[0012] The beneficial effects of this utility model are:

[0013] This invention achieves mechanical dual-color indication by setting a pull rod with white and red areas and linking the rotation position of the pull rod with the tripping state. When a leakage current trips, the pull rod rotates, and the positions of both the white and red areas change. The color change observed through the observation port on the circuit breaker casing is eye-catching, greatly facilitating users and maintenance personnel to quickly identify the fault type and improving troubleshooting efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the trip unit in the non-tripped state of this utility model;

[0016] Figure 2 This is a schematic diagram of the upper structure of the trip unit of this utility model;

[0017] Figure 3 This is a schematic diagram of the tripping state of the tripping device of this utility model;

[0018] Figure 4 This is a schematic diagram of the bottom structure of the trip unit of this utility model;

[0019] Figure 5 This is a schematic diagram of the tie rod structure of this utility model;

[0020] The attached figures are labeled as follows:

[0021] 1. Trip unit bracket; 3. Coil; 4. Stationary iron core; 5. Moving iron core; 6. Pull rod; 7. Shaft; 8. Torsion spring; 9. Clamping plate; 10. Compression spring; 11. White area; 12. Red area; 13. Bayonet; 14. Fixing block one; 15. Fixing block two; 16. Protrusion; 17. Limiting block; 18. Circular groove. Detailed Implementation

[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] A residual current circuit breaker assembly, such as Figures 1-5 As shown, the circuit breaker includes a plastic trip unit bracket 1 as the mounting base. An electromagnetic drive component, comprising a stationary iron core 4, a coil 3, and a moving iron core 5, is fixedly installed in the hollow area inside the trip unit bracket 1. The stationary iron core 4 is snapped onto one end of the coil 3, while the moving iron core 5 is placed in a hole at the other end of the coil 3, allowing it to reciprocate along its axis under electromagnetic force. The stationary iron core 4 and the moving iron core 5 are located at opposite ends of the coil 3, forming a complete magnetic circuit system. A shaft 7 is fixedly connected to one end of the trip unit bracket 1, and a pull rod 6 is rotatably mounted on the shaft 7. The end of the pull rod 6 away from the shaft 7 is made of conductive material and is energized to the internal structure of the circuit breaker. The moving iron core 5 is used to pull the pull rod 6 to rotate. The upper end of the pull rod 6 has a white area 11 and a red area 12. This trip unit assembly is located inside the circuit breaker housing, and the circuit breaker housing has an observation port corresponding to the position of the end of the pull rod 6. Through the observation port, it can be seen whether the white area 11 or the red area 12 is directly opposite the observation port. A torsion spring 8 is sleeved on the shaft 7. One end of the torsion spring 8 (the first torsion arm) abuts against or is locked onto a protrusion on the trip unit bracket 1, while the other end (the second torsion arm) is locked onto a special groove or protrusion 16 on the pull rod 6. The preload of the torsion spring 8 ensures that the pull rod 6 is always subjected to a force that causes it to rotate clockwise (towards...). Figure 1 (View angle) Torque, a clamping plate 9 is rotatably installed on one side of the trip unit bracket 1, the end of the clamping plate 9 is engaged with one side of the pull rod 6, and a compression spring 10 is provided between the clamping plate 9 and the trip unit bracket 1. The operating mechanism of the circuit breaker can press down the pressure plate, and the compression spring 10 is always in a compressed state.

[0024] One end of the trip unit bracket 1 is fixedly connected to a bearing seat, the rotating shaft is fixedly connected to the bearing seat, the lower end of the pull rod 6 is rotatably installed with the shaft body 7, and a bayonet 13 is opened in the middle of the pull rod 6, and the end of the moving iron core 5 is engaged with the bayonet 13.

[0025] At one end of the trip unit bracket 1, a bearing seat is fixed by ultrasonic welding or screws. A shaft 7 is fixed on the bearing seat, and a pull rod 6 is sleeved on the shaft 7 through a round hole at its lower end, allowing the pull rod 6 to rotate around the shaft 7. The end of the moving iron core 5 (usually designed as a hook or ball head) engages with the bayonet 13. When the moving iron core 5 is attracted by the coil 3 and moves to the left (towards... Figure 1 When viewed from a certain angle, the lower end of the lever 6 will be pulled through the bayonet 13, forcing the lever 6 to rotate counterclockwise around the axis 7.

[0026] A fixing block 14 is fixedly connected to one side of the pull rod 6, and a fixing block 2 15 is fixedly connected to the end of the clamping plate 9. The fixing block 2 15 and the fixing block 14 are engaged in a locking fit.

[0027] On one side of the trip unit bracket 1, a retaining plate 9 is rotatably mounted via another shaft. The retaining plate 9 can swing around the shaft. On one side of the pull rod 6, a fixing block 14 is fixedly installed. Correspondingly, at the end of the retaining plate 9, a fixing block 25 is fixedly installed. When the pull rod 6 is in the position of... Figure 3 When in the position shown, the second fixing block 15 and the first fixing block 14 engage with each other, thereby overcoming the force of the torsion spring 8 and locking the pull rod 6.

[0028] A circular groove 18 is provided on one side of the trip unit bracket 1. One end of the compression spring 10 is fixed in the circular groove 18, and the other end is fixed to the card plate 9.

[0029] The spring force of the compression spring 10 forces the locking plate 9 to rotate counterclockwise around its axis of rotation, thereby ensuring that the fixing block 15 at its end can be engaged with the fixing block 14 on the pull rod 6.

[0030] The lower end of the pull rod 6 is fixedly connected to a limit block 17, which abuts against the shaft seat.

[0031] In order to limit the reset stroke of the pull rod 6 under the action of the torsion spring 8, a limiting block 17 is fixedly provided at the lower end of the pull rod 6. When the pull rod 6 rotates clockwise to a specific position under the action of the torsion spring 8, the limiting block 17 will abut against the side of the bearing seat, thereby preventing the pull rod 6 from rotating excessively.

[0032] A protrusion 16 is fixedly connected to one side of the trip unit bracket 1, and a through groove is provided on the card plate 9. The protrusion 16 is inserted into the through groove.

[0033] The protrusion 16 is inserted into the through groove. This structure not only plays an auxiliary positioning role, but also acts as a guide mechanism, restricting the card plate 9 to swing stably on the preset path, preventing it from deviating or getting stuck.

[0034] The working principle of the leakage current trip unit assembly provided by this utility model is as follows:

[0035] When the residual current circuit breaker (RCCB) is in normal operation, coil 3 is not energized, and moving iron core 5 does not move. At this time, the white area 11 at the upper end of the pull rod 6 is visible through the observation port on the circuit breaker housing, indicating that the circuit breaker is in normal operation. When a leakage current is detected, coil 3 is energized, generating a magnetic field that attracts moving iron core 5 to move to the left. Moving iron core 5 pulls the latch 13 of pull rod 6, causing pull rod 6 to overcome the locking force of latch plate 9 and rotate counterclockwise until its red area 12 is visible through the observation port on the circuit breaker housing, providing a leakage current indication. Latch plate 9 is then lifted and fixed by the action of compression spring 10. Block 2 15 engages with fixed block 14, causing the circuit breaker to trip and disconnect the circuit. After the leakage fault is cleared, coil 3 is not energized, and a manual closing operation is performed. During the closing process, the circuit breaker's operating mechanism (such as the handle) will press down the locking plate 9. The locking plate 9 overcomes the force of the compression spring 10 and rotates clockwise. Fixed block 2 15 at its end disengages from fixed block 14. Pull rod 6 quickly rotates clockwise under the drive of torsion spring 8. Limit block 17 stops when it hits the shaft seat, and pull rod 6 returns to the standby position. The white area 11 becomes visible again, completing the reset and preparing for the next operation.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A residual current circuit breaker assembly, comprising a circuit breaker bracket (1), characterized in that, The trip unit bracket (1) is provided with a stationary iron core (4), a coil (3) and a moving iron core (5) inside. The stationary iron core (4) and the moving iron core (5) are located at both ends of the coil (3). A shaft (7) is fixedly connected to one end of the trip unit bracket (1). A pull rod (6) is rotatably installed on the shaft (7). The moving iron core (5) is used to pull the pull rod (6) to rotate. A white area (11) and a red area (12) are provided on the upper end of the pull rod (6). A torsion spring (8) is sleeved on the shaft (7). One end of the torsion spring (8) abuts against the trip unit bracket (1) and the other end is engaged with the pull rod (6). A clamping plate (9) is rotatably installed on one side of the trip unit bracket (1). The end of the clamping plate (9) is engaged with one side of the pull rod (6). A compression spring (10) is provided between the clamping plate (9) and the trip unit bracket (1).

2. The residual current trip unit assembly according to claim 1, characterized in that, One end of the trip unit bracket (1) is fixedly connected to a bearing seat, the rotating shaft is fixedly connected to the bearing seat, the lower end of the pull rod (6) is rotatably installed with the shaft body (7), the middle part of the pull rod (6) is provided with a bayonet (13), and the end of the moving iron core (5) is engaged with the bayonet (13).

3. The residual current trip unit assembly according to claim 1, characterized in that, A fixing block 1 (14) is fixedly connected to one side of the pull rod (6), and a fixing block 2 (15) is fixedly connected to the end of the clamping plate (9). The fixing block 2 (15) and the fixing block 1 (14) are engaged in a locking fit.

4. A residual current circuit breaker assembly according to claim 1, characterized in that, The release device bracket (1) has a circular groove (18) on one side, and one end of the compression spring (10) is fixed in the circular groove (18), while the other end is fixed to the card plate (9).

5. A residual current circuit breaker assembly according to claim 2, characterized in that, The lower end of the pull rod (6) is fixedly connected to a limiting block (17), and the limiting block (17) abuts against the bearing seat.

6. A residual current circuit breaker assembly according to claim 1, characterized in that, The trip unit bracket (1) has a protrusion (16) fixedly connected to one side, and a through groove is provided on the card plate (9), with the protrusion (16) and the through groove being inserted into each other.

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