Isolation device for circuit breaker and circuit breaker
By arranging partitions on both sides of the circuit breaker's cover plate to block the phase-to-phase through holes, the problem of phase-to-phase short circuits in traditional circuit breakers is solved, achieving higher insulation and safety.
Patent Information
- Application Number
- CN202422944232.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The bottom-inlet structure of traditional circuit breakers is prone to causing phase-to-phase short circuits, especially between phase B and phase C, which is difficult to solve effectively with existing technology.
A first partition and a second partition are arranged on both sides of the middle cover partition of the circuit breaker. The two are coupled to the transmission component and block the phase-to-phase through holes during the movement of the transmission component, thereby extending the electrical clearance and reducing phase-to-phase short circuits.
By extending the electrical clearance, phase-to-phase short circuits in circuit breakers are reduced, thereby improving electrical safety and insulation performance.
Smart Images
Figure CN223513878U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] Example embodiments of the present disclosure generally relate to the field of computers, and in particular, to an isolation device for a circuit breaker and a circuit breaker. BACKGROUND
[0002] A circuit breaker is a device capable of controlling the on or off of a circuit. When an abnormality in power consumption (e.g., overload, short circuit, etc.) occurs in the circuit, the circuit breaker quickly cuts off the circuit to ensure the safety of the circuit and the load.
[0003] With the continuous development of electric vehicles, circuit breakers are also more widely used in charging pile structures of electric vehicles. CONTENT
[0004] In a first aspect of the present disclosure, an isolation device for a circuit breaker is provided. The isolation device comprises: a transmission member arranged between a handle mechanism and a leakage tripping device of the circuit breaker, and adapted to pass through an inter-phase through-hole of a middle cover partition plate of the circuit breaker to move under the drive of the handle mechanism and drive the leakage tripping device to reset; a first partition plate arranged on a first side of the middle cover partition plate towards the leakage tripping device and coupled to the transmission member, the first partition plate being adapted to at least partially cover the inter-phase through-hole; and a second partition plate arranged on a second side of the middle cover partition plate away from the leakage tripping device and coupled to the transmission member, the second partition plate being adapted to at least partially cover the inter-phase through-hole.
[0005] In some embodiments, a plane in which the first partition plate lies is perpendicular to an axis of the inter-phase through-hole; and / or a plane in which the second partition plate lies is perpendicular to the axis of the inter-phase through-hole.
[0006] In some embodiments, a projection of the second partition plate on the first partition plate is within a boundary of the first partition plate.
[0007] In some embodiments, the first partition plate is spaced apart from the second partition plate by a predetermined distance.
[0008] In some embodiments, the transmission member, the first partition plate, and the second partition plate are integrally formed.
[0009] In some embodiments, the isolation device further comprises: an inter-phase partition plate arranged between the first partition plate and the second partition plate and adapted to extend towards the middle cover partition plate.
[0010] In some embodiments, the inter-phase partition plate is coupled to a base of the circuit breaker.
[0011] In some embodiments, a side of the inter-phase partition plate towards the middle cover partition plate is provided with a relief slot, an opening of the relief slot being arranged towards the inter-phase through-hole.
[0012] According to some embodiments of this disclosure, an isolation device for a circuit breaker is provided by arranging a first partition and a second partition on both sides of the middle cover partition of the circuit breaker, such that the first partition and the second partition are respectively coupled to a transmission member. In this way, the first partition and the second partition can move with the transmission member and at least partially block the phase-to-phase through holes during the movement of the transmission member, thereby increasing the electrical clearance between different phases of the circuit breaker and reducing phase-to-phase short circuits in the circuit breaker.
[0013] In a second aspect of this disclosure, a circuit breaker is provided. The circuit breaker includes: a base disposed between a power supply device and a load; a handle mechanism coupled to a housing, adapted to control the closing and opening actions of the circuit breaker under user operation; a residual current device (RCD) coupled to the housing; a housing coupled to the base and including a central cover partition disposed between the handle mechanism and the RCD; and an isolation device according to a first aspect of this disclosure, disposed between the handle mechanism and the RCD.
[0014] In some embodiments, the base includes at least two working chambers, wherein a handle mechanism is disposed in a first working chamber of the at least two working chambers, and a residual current device is disposed in a second working chamber of the at least two working chambers.
[0015] It should be understood that the content described in this content section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0016] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:
[0017] Figure 1 A schematic diagram of the internal structure of a circuit breaker according to some embodiments of the present disclosure is shown;
[0018] Figure 2 A schematic diagram of the internal mechanism of a circuit breaker according to some embodiments of the present disclosure is shown;
[0019] Figure 3 A cross-sectional view of a circuit breaker according to some embodiments of the present disclosure is shown;
[0020] Figure 4 A partial structural schematic diagram of an isolation device according to some embodiments of the present disclosure is shown; and
[0021] Figure 5 A schematic diagram of a phase spacer according to some embodiments of the present disclosure is shown. Detailed Implementation
[0022] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.
[0023] It should be noted that the headings of any section / subsection provided herein are not limiting. Various embodiments are described throughout this document, and embodiments of any type may be included under any section / subsection. Furthermore, embodiments described in any section / subsection may be combined in any way with any other embodiments described in the same section / subsection and / or different sections / subsections.
[0024] In the description of embodiments of this disclosure, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions may also be included below. The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.
[0025] As briefly mentioned earlier, circuit breakers currently used in the charging pile field typically employ a bottom-entry configuration. For example, in a single-break circuit breaker, the moving contact at the bottom is connected to the power supply, while the stationary contact at the top is connected to the load. This structure ensures that the moving contact, along with the handle mechanism and residual current device coupled to it, remains energized regardless of whether the circuit breaker is in the closed or open position. Because of this, conventional bottom-entry single-break circuit breakers are prone to phase-to-phase short circuits.
[0026] Specifically, for phases B and C of a circuit breaker, phase B has a handle mechanism, and phase C has a residual current device (RCD). To enable the handle mechanism to reset the RCD, interphase through-holes are provided on the middle cover plates of phases B and C, allowing the transmission components to connect the RCD to the handle mechanism via these through-holes. However, the presence of these through-holes also makes phase-to-phase short circuits more likely to occur between phases B and C of the circuit breaker.
[0027] The isolation device and circuit breaker for circuit breakers provided in this disclosure solve, or at least partially solve, the aforementioned problems and other potential problems existing in conventional solutions. According to some embodiments of the isolation device for circuit breakers in this disclosure, a first partition and a second partition are respectively arranged on both sides of the middle cover partition of the circuit breaker, and the first and second partitions are respectively coupled to a transmission member. In this way, the first and second partitions can move with the transmission member and at least partially block the phase-to-phase through-holes during the movement of the transmission member, thereby increasing the electrical clearance between different phases of the circuit breaker and reducing phase-to-phase short circuits in the circuit breaker.
[0028] Figure 1 A schematic diagram of the internal structure of a circuit breaker according to some embodiments of the present disclosure is shown. For example... Figure 1 As shown, the circuit breaker includes a base 5, which includes at least two working chambers, each containing a moving contact 53 and a stationary contact 54. In some embodiments, the base 5 has four working chambers, each containing four sets of moving contacts 53 and stationary contacts 54, corresponding to the three-phase live wires and one-phase neutral wire of the power supply line, respectively. The circuit breaker also includes a handle mechanism 6 and a residual current device (RCD) 7. The handle mechanism 6 is located in the working chamber corresponding to phase B (also referred to as the first working chamber 51) and is adapted to control at least the moving contacts 53 coupled to the three-phase live wires to perform a closing action. The RCD 7 is located in the working chamber corresponding to phase C (also referred to as the second working chamber 52) and is adapted to control the moving contacts 53 coupled to the three-phase live wires to perform a tripping action.
[0029] Figure 2 A schematic diagram of the internal mechanism of a circuit breaker according to some embodiments of the present disclosure is shown. Figure 3 Cross-sectional views of circuit breakers according to some embodiments of the present disclosure are shown, such as Figure 2 and Figure 3 As shown, the circuit breaker also includes a housing, which is coupled to the base 5 and adapted to cover components such as the moving contact 53, the stationary contact 54, the handle mechanism 6, and the residual current device 7. The housing also includes a middle cover partition 8, which is adapted to separate different working chambers after the housing is coupled to the base 5. Interphase through holes 81 are also formed on the middle cover partition 8 on the housing corresponding to the first working chamber 51 and the second working chamber 52.
[0030] Figure 4 A partial structural schematic diagram of an isolation device according to some embodiments of the present disclosure is shown. For example... Figure 4 As shown, and in combination Figure 3An isolation device is also arranged between the first working chamber 51 and the second working chamber 52. The isolation device includes a transmission component 1, which passes through the phase-to-phase through hole 81. The two ends of the transmission component 1 are respectively coupled to the handle mechanism 6 located in the B-phase working chamber and the residual current device 7 located in the C-phase working chamber. Thus, when the handle mechanism 6 is activated (for example, when the handle mechanism 6 performs a closing action), the handle mechanism 6 can drive the transmission component 1 and further drive the residual current device 7 to reset.
[0031] A first partition 2 and a second partition 3 are coupled to the transmission component 1. The first partition 2 is arranged on the first side of the middle cover partition 8 facing the residual current device 7, and the second partition 3 is arranged on the second side of the middle cover partition 8 facing the handle mechanism 6. The first partition 2 and the second partition 3 are respectively coupled to the transmission component 1 and are adapted to at least partially cover the interphase through-hole 81 during the movement of the transmission component 1. As a result, the first partition 2 and the second partition 3 can extend the electrical clearance between the first working cavity 51 and the second working cavity 52, improving the interphase insulation between the first working cavity 51 and the second working cavity 52. This reduces the generation of electric arc between the first working cavity 51 and the second working cavity 52, improving the electrical safety of the circuit breaker.
[0032] In some embodiments, the interphase through-hole 81 is arranged on the side of the middle cover partition 8 near the interphase partition 4, and the side of the interphase through-hole 81 facing the interphase partition 4 is open, so that during the coupling of the housing to the base 5 when the transmission member 1 is installed between the handle mechanism 6 and the leakage trip device 7, the interphase through-hole 81 can partially surround the outside of the transmission member 1.
[0033] In some embodiments, the first partition 2 is arranged directly opposite the alternating through hole 81, that is, the plane of the first partition 2 is perpendicular to the axis of the alternating through hole 81. Alternatively, in some other embodiments, the second partition 3 is arranged directly opposite the alternating through hole 81, that is, the plane of the second partition 3 is perpendicular to the axis of the alternating pupil.
[0034] In some embodiments, the area of the cross-section of the first partition 2 perpendicular to the axis of the inter-phase through hole 81 is greater than the area of the cross-section of the second partition 3 perpendicular to the inter-phase through hole 81. For example, the projection of the second partition 3 onto the first partition 2 lies within the boundary of the first partition 2. Thus, the smaller cross-section of the second partition 3 can reduce interference with the handle mechanism 6, while the larger area of the first partition 2 can more stably cover the inter-phase through hole 81.
[0035] In some embodiments, the first partition 2 and the second partition 3 may be parallel to each other and spaced apart by a predetermined distance. In some embodiments, the predetermined distance between the first partition 2 and the second partition 3 may be slightly greater than the thickness of the middle cover partition 8. Thus, the isolation device can maintain stable insulation between the first working chamber 51 and the second working chamber 52 while reducing friction with the middle cover partition 8, thereby facilitating the movement of the transmission member 1 with the handle mechanism 6.
[0036] In some embodiments, the transmission component 1, the first partition 2, and the second partition 3 may be integrally formed. For example, the transmission component 1, the first partition 2, and the second partition 3 may be processed by injection molding or other methods. In some embodiments, the transmission component 1 may also be fixedly connected to the first partition 2 and the second partition 3 by injection bonding, ultrasonic welding, or other methods. In some other embodiments, mounting holes are formed on the first partition 2 and / or the second partition 3, and the transmission component 1 passes through the mounting holes and is fixed by the tight fit between the transmission component 1 and the wall of the mounting holes.
[0037] Figure 5 A schematic diagram of the phase spacer 4 according to some embodiments of the present disclosure is shown, such as... Figure 5 As shown, and in combination Figure 3 In some embodiments, the isolation device further includes a phase spacer 4 disposed between the first partition 2 and the second partition 3. The phase spacer 4 is coupled to the base 5 and adapted to extend toward the middle cover partition 8 of the housing. The arrangement of the phase spacer 4 extends the electrical clearance between the first working chamber 51 and the second working chamber 52. In some embodiments, after the housing is coupled to the base 5, the phase spacer 4 abuts against the middle cover partition 8.
[0038] In some embodiments, a clearance groove 41 is provided on the side of the partition plate 4 facing the middle cover partition plate 8, and the clearance groove 41 extends through the opposite sidewalls of the partition plate 4. The clearance groove 41 is disposed and connected to the inter-phase through hole 81. In some embodiments, the side of the first partition plate 2 facing the base 5 protrudes from the bottom surface of the clearance groove 41 in a direction close to the base 5. During the movement of the first partition plate 2 with the transmission member 1, the first partition plate 2 can cover the clearance groove 41 throughout the entire process to ensure the inter-phase isolation between the first working cavity 51 and the second working cavity 52. Similarly or arbitrarily, the side of the second partition plate 3 facing the base 5 protrudes from the bottom surface of the clearance groove 41 in a direction close to the base 5. During the movement of the second partition plate 3 with the transmission member 1, the second partition plate 3 can cover the clearance groove 41 throughout the entire process to ensure the inter-phase isolation between the first working cavity 51 and the second working cavity 52.
[0039] Various implementations of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed implementations. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described implementations. The terminology used herein is chosen to best explain the principles, practical applications, or improvements to technology in the market, or to enable others skilled in the art to understand the various implementations disclosed herein.
Claims
1. An isolation device for a circuit breaker, characterized in that, include: A transmission component (1) is arranged between the handle mechanism (6) and the residual current trip unit (7) of the circuit breaker and is adapted to pass through the phase through hole (81) of the middle cover plate (8) of the circuit breaker to move under the drive of the handle mechanism (6) and drive the residual current trip unit (7) to reset. A first partition (2) is disposed on the first side of the middle cover partition (8) facing the leakage current trip unit (7) and coupled to the transmission member (1), the first partition (2) being adapted to at least partially cover the interphase through-hole (81); and The second partition (3) is arranged on the second side of the middle cover partition (8) away from the leakage trip unit (7) and coupled to the transmission member (1). The second partition (3) is adapted to at least partially cover the interphase through hole (81).
2. The isolation device according to claim 1, characterized in that, The plane containing the first partition (2) is perpendicular to the axis of the interphase through-hole (81); and / or The plane containing the second partition (3) is perpendicular to the axis of the interphase through hole (81).
3. The isolation device according to claim 2, characterized in that, The projection of the second partition (3) onto the first partition (2) lies within the boundary of the first partition (2).
4. The isolation device according to claim 1, characterized in that, The first partition (2) and the second partition (3) are spaced apart by a predetermined distance.
5. The isolation device according to claim 1, characterized in that, The transmission component (1), the first partition (2), and the second partition (3) are integrally formed.
6. The isolation device according to any one of claims 1-5, characterized in that, Also includes: A phase partition (4) is arranged between the first partition (2) and the second partition (3) and is adapted to extend toward the middle cover partition (8).
7. The isolation device according to claim 6, characterized in that, The phase spacer (4) is coupled to the base (5) of the circuit breaker.
8. The isolation device according to claim 6, characterized in that, The phase partition (4) has a relief groove (41) on the side facing the middle cover partition (8), and the relief groove (41) is set with its opening facing the phase through hole (81).
9. A circuit breaker, characterized in that, include: The base (5) is positioned between the power supply device and the load; The housing is coupled to the base (5) and includes a middle cover partition (8). The handle mechanism (6) is coupled to the housing and is adapted to control the closing and opening actions of the circuit breaker under user operation; The residual current trip unit (7) is coupled to the housing; as well as The isolation device according to any one of claims 1-8 is arranged between the handle mechanism (6) and the leakage current trip unit (7), and The middle cover partition (8) is arranged between the handle mechanism (6) and the leakage trip device (7).
10. The circuit breaker according to claim 9, characterized in that, The base (5) includes: At least two working chambers, and The handle mechanism (6) is arranged in the first working chamber (51) of the at least two working chambers, and the leakage trip device (7) is arranged in the second working chamber (52) of the at least two working chambers.