A new structure of small four-pole leakage circuit resistor aging platform

Abstract

This utility model relates to a novel structure for an aging test bench for miniature four-pole residual current circuit breakers (RCCBs), belonging to the field of low-voltage electrical appliance manufacturing technology. It includes a base plate with several mounting seats. A miniature four-pole RCCB is mounted below each mounting seat for aging testing. Each mounting seat contains contacts extending into the RCCB. A pin connecting the contact to the mounting seat is located in the middle of each contact, and a retaining pin inserting into the mounting seat is located at the upper rear end of each contact. This design features a simple structure, convenient operation, and good operational stability. It solves the problem of aging miniature circuit breakers, improves the aging efficiency of miniature RCCBs, and enhances aging safety.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliance manufacturing technology, specifically to a novel structure for a small four-pole leakage circuit aging platform. Background Technology

[0002] A four-pole circuit breaker is a type of circuit breaker used for power switching, providing leakage current and electric shock protection. Its electronic structure mainly consists of a zero-sequence current transformer, an electronically controlled leakage current trip unit, and a circuit breaker with overload and short-circuit protection. When the leakage current in the circuit reaches a set value, the circuit breaker will cut off the power supply to provide protection.

[0003] This circuit breaker is suitable for various load conditions, including normal conditions where the neutral current does not exceed 25% of the phase current, unbalanced three-phase loads with a large number of electronic devices in the load, and situations where the three phases and neutral line are disconnected to protect single-phase equipment when the neutral line is broken.

[0004] The four-pole circuit breaker detects leakage current through a zero-sequence current transformer. When the leakage or electric shock current reaches a set threshold, the secondary winding outputs a signal to trigger the trip unit, causing the circuit breaker to disconnect the circuit, thereby achieving the protection function.

[0005] Miniature circuit breakers must undergo aging treatment before leaving the factory to improve their stability and reliability. Traditional aging benches for miniature circuit breakers use wires to connect to the circuit breaker terminals and tighten them with screws. While this method is intuitive and reliable, it is inefficient and often affects normal production due to the large number of miniature circuit breakers. Furthermore, the aging line voltage for four-pole miniature circuit breakers is 380V, and this wiring method also poses safety hazards. Summary of the Invention

[0006] This invention primarily addresses the shortcomings of existing technologies by providing a novel structure for an aging bench for miniature four-pole residual current circuit breakers (RCCBs). This structure is characterized by its simple design, convenient operation, and high operational stability. It solves the problem of aging miniature circuit breakers, improving their aging efficiency and safety.

[0007] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions:

[0008] A novel structure for a miniature four-pole residual current circuit breaker (RCCB) aging test bench includes a base plate with several mounting seats. A miniature four-pole RCCB is located below each mounting seat and is used for aging testing. Each mounting seat contains a contact extending into the RCCB. The contact has a pin in the middle that connects to the mounting seat, and a stop pin at the upper rear end of the contact that inserts into the mounting seat.

[0009] Preferably, a base is provided between the mounting base and the base plate, which is fixed to the mounting base with screws, and a cover plate is provided at the upper end of the base.

[0010] Preferably, a spring is provided between the upper part of the contact and the cover plate to engage with the mounting base. The contact is in close contact with the conductive frame of the residual current circuit breaker by the action of the spring.

[0011] Preferably, the base plate and the base are provided with lead wire holes, and the stop pin is provided with a power line passing through the lead wire holes.

[0012] Preferably, the four-pole miniature circuit breaker is fixed to the base plate by screws, and the guide rail is inserted into the four-pole miniature circuit breaker. The four-pole miniature circuit breaker is mounted on the base plate via the guide rail, and the conductive frame is aligned with the contacts.

[0013] This invention can achieve the following effects:

[0014] This invention provides a novel structure for an aging bench for miniature four-pole residual current circuit breakers (RCCBs). Compared with existing technologies, it features a simple structure, convenient operation, and good operational stability. It solves the problem of aging miniature circuit breakers, improves the aging efficiency of miniature RCCBs, and enhances aging safety. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the structure of this utility model after the cover plate is removed.

[0016] Figure 2 This is a structural cross-sectional view of the present invention.

[0017] In the diagram: 1. Base plate; 2. Base; 3. Lead hole; 4. Power cord; 5. Mounting base; 6. Spring; 7. Contact; 8. Pin; 9. Four-pole miniature residual current circuit breaker; 10. Guide rail; 11. Stop pin; 12. Cover plate. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] Example: Figure 1 and Figure 2As shown, a novel structure for an aging platform for a miniature four-pole residual current circuit breaker (RCCB) includes a base plate 1 with four mounting seats 5. A base 2, screwed to the mounting seats 5, is provided between the mounting seats 5 and the base plate 1. A cover plate 12 is provided on the upper end of the base 2. A miniature four-pole RCCB 9 is located below the mounting seats 5. A guide rail 10, screwed to the base plate 1, is provided between the miniature four-pole RCCB 9 and the base plate 1, and the guide rail 10 is inserted into the miniature four-pole RCCB 9. Each mounting seat 5 has a contact 7 extending into the miniature four-pole RCCB 9. A spring 6, sleeved between the upper part of the contact 7 and the cover plate 12, is provided for engagement with the mounting seat 5. A pin 8, connected to the mounting seat 5, is provided in the middle of the contact 7, and a stop pin 11, inserted into the mounting seat 5, is provided at the upper rear end of the contact 7. Lead wire holes 3 are provided on the base plate 1 and the base 2, and a power wire 4 passes through the lead wire hole 3 on the stop pin 11.

[0020] The mounting base 5 has a slot, and the contact 7 is placed in the slot. The contact 7 is connected to the mounting base 5 by a pin 8. The contact 7 can rotate around the pin 8 in the slot of the mounting base 5. The pin 8 is fixed to the mounting base 5 with glue. The slot of the mounting base 5 is also provided with a hole to accommodate the spring 6. The mounting base 5 is also provided with a stop pin 11 for limiting the contact 7 under the action of the spring 6.

[0021] Mounting bracket 5 is fastened to base 2 by two screws at the bottom. Cover plate 12 is connected to base 2 by screws, pressing spring 6. Base 2 is fastened to base plate 1 by four screws at the bottom. Lead hole 3 is used for power line 4 to enter from base plate 1 and base 2 and connect to stop pin 11 on each phase mounting bracket 5. Four-pole miniature residual current circuit breaker 9 is directly hung on guide rail 10, which is fastened to base plate 1 by screws. During operation, align the conductive frames of each phase of the four-pole miniature residual current circuit breaker 9 with the contacts 7 of each phase, slide the contacts 7 upwards close to the base plate, and hang them on guide rail 10; so that the contacts 7 are in close contact with the conductive frames of each phase of the miniature residual current circuit breaker under the action of spring 6, and aging can be performed by powering on.

[0022] When power cord 4 is connected to stop pin 11, power is applied to begin the aging test. Contact 7 remains in contact with the conductive frame under the action of spring 6, ensuring a stable current path. Contact 7 can rotate around pin 8 within the mounting slot, with spring 6 providing a limit to ensure uniform contact pressure. Cover plate 12 is fixed to the base with screws, further tightening spring 6 to ensure the stability and reliability of contact 7 during the test.

[0023] In summary, this novel aging bench for miniature four-pole residual current circuit breakers features simple structure, convenient operation, and good operational stability. It solves the problem of aging miniature circuit breakers, improves the aging efficiency of miniature residual current circuit breakers, and enhances aging safety.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A novel structure for a small quadrupole drain circuit aging test bench, characterized in that: Includes a base plate (1), on which a plurality of mounting seats (5) are provided. A four-pole miniature residual current circuit breaker (9) is provided below the mounting seats (5). Each mounting seat (5) is provided with a contact (7) extending into the four-pole miniature residual current circuit breaker (9). The middle part of the contact (7) is provided with a pin (8) connected to the mounting seat (5). The upper rear end of the contact (7) is provided with a stop pin (11) that is inserted into the mounting seat (5).

2. The novel structure of a small quadrupole drain circuit aging test bench according to claim 1, characterized in that: The mounting base (5) and the base plate (1) are provided with a base (2) which is screwed and fixed to the mounting base (5). The upper end of the base (2) is provided with a cover plate (12).

3. The novel structure of a small quadrupole drain circuit aging test bench according to claim 2, characterized in that: The upper part of the contact (7) and the cover plate (12) are provided with springs (6) that are connected to the mounting base (5).

4. The novel structure of a miniature quadrupole drain circuit aging test bench according to claim 2, characterized in that: The base plate (1) and the base (2) are provided with lead wire holes (3), and the stop pin (11) is provided with a power line (4) that passes through the lead wire hole (3).

5. The novel structure of a miniature quadrupole drain circuit aging test bench according to claim 1, characterized in that: The four-pole miniature residual current circuit breaker (9) is provided with a guide rail (10) for screw connection and fixation between it and the base plate (1). The guide rail (10) is inserted into the four-pole miniature residual current circuit breaker (9).

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