A false tripping prevention multifunctional leakage circuit breaker

Abstract

The utility model relates to the technical field of release, concretely is a prevent false jump multifunctional electric leakage release, the utility model discloses a release main part, release main part includes release shell, and the release shell outer wall is seted up with the mounting groove, and the inwall of mounting groove is seted up with the movable slot no.

Description

Technical Field

[0001] This utility model relates to the field of trip unit technology, specifically a multi-functional leakage trip unit that prevents accidental tripping. Background Technology

[0002] A trip unit is a device mechanically connected to a circuit breaker, used to release the holding mechanism and automatically disconnect the circuit breaker. Its function is to ensure that when there is leakage current in the line or electric shock to a person, the vector sum of the currents passing through the zero-sequence current transformer is not equal to zero, a voltage is generated on both sides of the secondary coil of the transformer, and amplified by an integrated circuit. When the voltage reaches the set value, the power supply is cut off through the leakage current trip unit, thereby playing a role in electric shock and leakage protection.

[0003] In existing technologies, traditional trip units typically rely on a single electromagnetic triggering mechanism, such as push rod linkage, which cannot be adapted to circuit breakers with different structures. In particular, they are difficult to be compatible with circuit breaker types that only have mechanical trip ports, resulting in limited functionality and poor applicability. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-functional leakage current trip device to prevent accidental tripping, so as 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 multi-functional leakage current trip device for preventing accidental tripping is used to cooperate with the circuit breaker body to automatically disconnect the circuit breaker body when the circuit is abnormal. It includes a trip device body, the trip device body includes a trip device housing, the outer wall of the trip device housing has an installation groove, the inner wall of the installation groove has a through-hole movable groove, a latch is movably installed inside the movable groove, and a push rod is movably arranged inside the installation groove.

[0007] The circuit breaker body includes a circuit breaker housing, with a movable slot 2 extending through the outside of the circuit breaker housing, and a triggering mechanism inside the circuit breaker housing, the triggering mechanism including a first trigger piece, a second trigger piece, and a trigger rod.

[0008] Preferably, the outer wall of the push rod has a through-hole groove, and one end of the latch is movably installed inside the through-hole groove.

[0009] Preferably, the push rod has a contact surface at one end away from the movable groove, and the contact surface cooperates with the actuating rod.

[0010] Preferably, the first actuating piece, the second actuating piece, and the actuating rod are all movably installed inside the circuit breaker housing, and the first actuating piece, the second actuating piece, and the actuating rod cooperate with each other.

[0011] Preferably, one end of the trigger rod passes through the circuit breaker body via the movable slot 2, an iron block is installed inside the circuit breaker housing, and an electromagnetic solenoid is wound around the outside of the iron block.

[0012] Preferably, an operating handle is movably installed on the outer wall of the circuit breaker housing, and a tripping opening is provided through the outer wall of the circuit breaker housing, and the tripping opening cooperates with the locking latch.

[0013] The beneficial effects of this utility model are:

[0014] 1. In this utility model, by setting a push rod, when the circuit breaker body leaks current, the trip unit body reacts immediately, so that the push rod can touch the latch, and the circuit breaker is disconnected in conjunction with the triggering mechanism. At the same time, the push rod can be removed and directly inserted into the circuit breaker trip port through the latch through the movable groove, forming a purely mechanical interlock. The latch directly moves the contact piece to trigger the circuit breaker to disconnect. Through the above operations, the trip unit can connect to different types of circuit breakers, effectively improving its applicability and providing multi-functional performance.

[0015] 2. In this utility model, the push rod contact surface adopts a bevel design, which can ensure that the push force of the trigger rod is efficiently converted into the lateral displacement of the push rod, reduce energy loss, improve transmission efficiency, improve the reliability of the circuit breaker disconnection operation, and avoid false tripping. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a schematic diagram of the structure of the circuit breaker housing and mounting groove of this utility model;

[0020] Figure 4 This is a partial structural schematic diagram of the main body of the circuit breaker of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. Trip unit body; 2. Circuit breaker body; 3. Movable slot one; 4. Locking latch; 5. Push rod; 6. Waist-shaped slot; 7. Movable slot two; 8. Actuating rod; 9. Iron block; 10. Operating handle; 11. Actuating piece one; 13. Circuit breaker housing; 14. Trip unit housing; 15. Trip port; 16. Electromagnetic solenoid; 17. Actuating piece two; 18. Mounting slot; 19. Contact surface. Detailed Implementation

[0023] 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.

[0024] A multi-functional residual current trip device to prevent false tripping, such as Figures 1-4 As shown, a trip unit 1 is used to cooperate with the circuit breaker body 2 to automatically disconnect the circuit breaker body 2 in case of circuit abnormality. The trip unit 1 includes a trip unit housing 14, an installation groove 18 is provided on the outer wall of the trip unit housing 14, a movable groove 3 is provided through the inner wall of the installation groove 18, a latch 4 is movably installed inside the movable groove 3, and a push rod 5 is movably provided inside the installation groove 18. The circuit breaker body 2 includes a circuit breaker housing 13, a movable groove 7 is provided through the outer side of the circuit breaker housing 13, and a triggering mechanism is provided inside the circuit breaker housing 13. The triggering mechanism includes a trigger piece 11, a trigger piece 17, and a trigger rod 8.

[0025] The outer wall of the push rod 5 has a through-hole groove 6. One end of the latch 4 is movably installed inside the through-hole groove 6. The through-hole groove 6 enables a flexible connection between the push rod 5 and the latch 4. After the push rod 5 is removed, it automatically becomes a mechanical guide rail for the latch 4. The end of the push rod 5 away from the movable groove 3 has a contact surface 19, which cooperates with the actuating rod 8. The contact surface 19 adopts a bevel design, which can ensure that the thrust of the actuating rod 8 is efficiently converted into the lateral displacement of the push rod 5, reducing energy loss, improving transmission efficiency, improving the reliability of the circuit breaker disconnection operation, and avoiding false tripping.

[0026] The first trigger piece 11, the second trigger piece 17, and the trigger rod 8 are all movably installed inside the circuit breaker housing 13, and the first trigger piece 11, the second trigger piece 17, and the trigger rod 8 cooperate with each other. One end of the trigger rod 8 passes through the circuit breaker body 2 through the movable slot 2 7. An iron block 9 is installed inside the circuit breaker housing 13, and an electromagnetic solenoid 16 is wound around the outside of the iron block 9. An operating handle 10 is movably installed on the outer wall of the circuit breaker housing 13. A tripping port 15 is opened through the outer wall of the circuit breaker housing 13, and the tripping port 15 cooperates with the latch 4. The diameter of the tripping port 15 is larger than the diameter of the latch 4 rod, ensuring that the latch can contact the first trigger piece 11. When the tripping port 15 cooperates with the latch 4, it plays a locking role. After the push rod 5 is removed, it becomes the mechanical triggering channel of the latch 4. When the leakage signal electromagnetic solenoid 16 attracts the iron block 9 and the trigger rod 8, it pushes the push rod 5 and the latch 4 disengages from the tripping port 15, releasing the operating handle 10.

[0027] When the triggering mechanism starts to drive, the first contact piece 11 moves, cooperating with the second contact piece 17, the electromagnetic solenoid 16, and the iron block 9, causing the operating handle 10 to rotate, thereby triggering the circuit breaker to open. This is existing technology and will not be described in detail.

[0028] In use, the push rod 5 is placed in the mounting groove 18, and the waist-shaped groove 6 on the push plate 5 is hinged to the latch 4. At the same time, the end contact surface 19 of the push rod 5 is coaxially aligned with the trigger rod 8, forming an electromagnetic mechanical transmission chain. When the circuit breaker body 2 leaks current, the trip unit body 1 reacts immediately and triggers the latch 4, causing one end of the latch 4 to move in the movable groove 3. With the waist-shaped groove 6, the push plate 5 moves laterally, causing the inclined surface of the contact surface 19 to move along one end of the trigger rod 8. This pushes the trigger rod 8 to slide along the movable groove 7, thereby causing the trigger mechanism to start transmission. This causes the trigger piece 11 in the trigger mechanism to move, and with the trigger piece 17, the electromagnetic solenoid 16, and the iron block 9, the operating handle 10 rotates, thereby triggering the circuit breaker to open.

[0029] When the circuit breaker body 2 has only a single trip port 15, the push rod 5 can be removed, and the latch 4 can be directly inserted through the movable slot 3 into the circuit breaker trip port 15, so that the latch 4 and the contact piece 11 are in direct contact, forming a purely mechanical interlock. When the circuit breaker body 2 leaks current, the latch 4 is displaced, so that the latch 4 directly moves the contact piece 11 through the trip port 15, triggering the circuit breaker body 2 to disconnect. Through the above operation, the trip device can connect to different types of circuit breakers, effectively improving applicability and providing multi-functional performance.

[0030] 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 multi-functional leakage current trip unit for preventing false tripping, used in conjunction with the circuit breaker body (2) to automatically disconnect the circuit breaker body (2) in case of circuit abnormality, comprising a trip unit body (1), characterized in that, The trip unit body (1) includes a trip unit housing (14), the outer wall of the trip unit housing (14) is provided with an installation groove (18), the inner wall of the installation groove (18) is provided with a movable groove (3), a latch (4) is movably installed inside the movable groove (3), and a push rod (5) is movably provided inside the installation groove (18). The circuit breaker body (2) includes a circuit breaker housing (13), and a movable slot (7) is provided through the outside of the circuit breaker housing (13). A triggering mechanism is provided inside the circuit breaker housing (13), and the triggering mechanism includes a first trigger piece (11), a second trigger piece (17), and a trigger rod (8).

2. The multi-functional leakage current trip device for preventing false tripping according to claim 1, characterized in that, The outer wall of the push rod (5) is provided with a waist-shaped groove (6), and one end of the latch (4) is movably installed inside the waist-shaped groove (6).

3. The multi-functional leakage current trip device for preventing false tripping according to claim 2, characterized in that, The push rod (5) has a contact surface (19) at one end away from the movable groove (3), and the contact surface (19) cooperates with the actuating rod (8).

4. A multi-functional leakage current trip device for preventing false tripping according to any one of claims 1 to 3, characterized in that, The first actuating piece (11), the second actuating piece (17), and the actuating rod (8) are all movably installed inside the circuit breaker housing (13), and the first actuating piece (11), the second actuating piece (17), and the actuating rod (8) cooperate with each other.

5. A multi-functional leakage current trip device for preventing false tripping according to claim 4, characterized in that, One end of the trigger rod (8) passes through the circuit breaker body (2) through the movable groove (7). An iron block (9) is installed inside the circuit breaker housing (13), and an electromagnetic solenoid (16) is wound around the outside of the iron block (9).

6. A multi-functional leakage current trip device for preventing false tripping according to claim 5, characterized in that, An operating handle (10) is movably installed on the outer wall of the circuit breaker housing (13). A tripping port (15) is provided through the outer wall of the circuit breaker housing (13), and the tripping port (15) cooperates with the latch (4).

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