An electric leakage detection module and an electric leakage circuit breaker

Abstract

The embodiment of the utility model provides a kind of leakage detection module and leakage circuit breaker, it is related to circuit breaker field.The utility model provides leakage detection module including shell cover, shell cover has incoming line end, exhaust passage, outgoing line end and mutual inductor in it, incoming line end, exhaust passage and outgoing line end are arranged along the height direction of shell cover;Shell cover also has base in it, incoming line end and outgoing line end are respectively arranged in the uppermost layer and the lowermost layer of base, and exhaust passage is located in the middle layer of base.The utility model provides leakage circuit breaker including circuit breaker body, leakage execution module and above-mentioned leakage detection module.The utility model can improve the problem that arc-extinguishing gas in 1U circuit breaker is not convenient to discharge.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and more specifically, to a leakage current detection module and a leakage current circuit breaker. Background Technology

[0002] The leakage current detection module is the core component of a residual current circuit breaker (RCCB). It monitors the leakage current in the circuit and triggers the tripping mechanism to cut off the power supply when the current reaches a dangerous threshold, preventing electric shock or electrical fire. When the circuit breaker interrupts current, the high temperature of the electric arc generated between the contacts decomposes the insulating material in the arc-extinguishing chamber, producing arc-extinguishing gas to reduce the arc temperature and remove arc energy. However, if the arc-extinguishing gas is not discharged in time, it may cause a sudden increase in internal pressure of the circuit breaker, or even lead to an explosion.

[0003] Among them, a 1U circuit breaker refers to a circuit breaker with a height of 1U (1 Unit = 1.75 inches). It has a compact structure and is suitable for rack-mounted electrical equipment in space-constrained environments. However, due to the compact design of the 1U circuit breaker, it is not convenient for the internal arc-extinguishing gas to be discharged. Utility Model Content

[0004] The purpose of this utility model is to provide a leakage current detection module and a leakage current circuit breaker, which can facilitate the discharge of arc-extinguishing gas inside the 1U circuit breaker.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a leakage current detection module, comprising:

[0007] The housing cover has an inlet terminal, an exhaust channel, an outlet terminal, and a current transformer inside. The inlet terminal, the exhaust channel, and the outlet terminal are arranged along the height direction of the housing cover.

[0008] The outer casing also has a base, the inlet end and the outlet end are respectively located on the uppermost and lowermost layers of the base, and the exhaust channel is located in the middle layer of the base;

[0009] One end of the exhaust channel is connected to the circuit breaker body located on one side of the leakage current detection module, and the other end of the exhaust channel is connected to the atmosphere through the outer casing to discharge the arc-extinguishing gas generated inside the circuit breaker body.

[0010] In an optional embodiment, the current transformer is disposed within the base, and the current transformer is located between the inlet terminal and the exhaust channel; or,

[0011] The current transformer is located between the exhaust channel and the outlet terminal.

[0012] In an optional embodiment, one end of the outer casing and the base together form a receiving cavity, and the current transformer is located inside the receiving cavity.

[0013] In an optional embodiment, the base is provided with a first receiving groove for accommodating the incoming wire and a second receiving groove for accommodating the outgoing wire.

[0014] In an optional embodiment, the base is provided with a plurality of insulating partitions, which are used to separate adjacent incoming terminals and adjacent outgoing terminals.

[0015] In an optional embodiment, the outer casing is provided with a snap-fit ​​block, and the base is provided with a snap-fit ​​groove that is adapted to the snap-fit ​​block.

[0016] Secondly, this utility model provides a residual current circuit breaker, including a circuit breaker body, a residual current actuation module, and a residual current detection module as described in any of the foregoing embodiments. The residual current detection module is disposed at one end of the circuit breaker body, and both the circuit breaker body and the residual current detection module are disposed on one side of the residual current actuation module.

[0017] In an optional embodiment, one end of the outer casing and the base together form a receiving cavity, and the current transformer is located inside the receiving cavity;

[0018] The receiving cavity is internally connected to the leakage current execution module.

[0019] In an optional embodiment, the leakage current actuation module has a lower housing and an upper housing that are interlocked with each other. The upper housing has a cavity extending beyond the lower housing and communicating with the receiving cavity. The current transformer can extend into the cavity.

[0020] In an optional embodiment, the base is provided with a connector for connecting to the circuit breaker body.

[0021] The beneficial effects of the leakage current detection module and leakage current circuit breaker provided in this embodiment of the utility model include:

[0022] By arranging the inlet, outlet, and outlet terminals along the height of the outer casing, the outlet terminal is located between the inlet and outlet terminals, making the internal functional areas of the leakage current detection module clear and the flow path reasonable, which facilitates gas circulation. Furthermore, the outlet terminal is used to discharge the arc-extinguishing gas generated inside the circuit breaker body, thereby improving the discharge effect of the arc-extinguishing gas and solving the problem that the arc-extinguishing gas inside the current 1U circuit breaker is not easy to discharge. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the residual current circuit breaker from a first-view perspective provided in this embodiment;

[0025] Figure 2 This is an exploded schematic diagram of the residual current circuit breaker provided in this embodiment;

[0026] Figure 3 This is a schematic diagram of the leakage current detection module provided in this embodiment from a first-view perspective;

[0027] Figure 4 This is a schematic diagram of the leakage current detection module provided in this embodiment from a second perspective.

[0028] Figure 5 This is a schematic diagram of the leakage current detection module provided in this embodiment from a third-person perspective.

[0029] Figure 6 This is a structural schematic diagram of a residual current circuit breaker from a first-view perspective, used to show the location of the current transformer in some alternative embodiments;

[0030] Figure 7 This is a structural schematic diagram of a residual current circuit breaker from a second perspective, used to show the location of the current transformer in some alternative embodiments.

[0031] Icons: 100-Leakage detection module; 110-Outer casing cover; 111-Receiving cavity; 120-Base; 121-First receiving slot; 122-Second receiving slot; 123-Insulating partition; 124-Snap-fit ​​slot; 125-Connector; 130-Inlet terminal; 131-First plug-in board; 132-First plug-in strip; 140-Insulating transformer; 150-Exhaust channel; 160-Outlet terminal; 161-Second plug-in board; 162-Second plug-in strip; 163-Wire; 200-Circuit breaker body; 210-Operating handle; 300-Leakage actuator module; 310-Upper housing; 320-Lower housing; 330-Cavity section. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0037] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0038] The leakage current detection module is the core component of a residual current circuit breaker (RCCB). It monitors the leakage current in the circuit and triggers the tripping mechanism to cut off the power supply when the current reaches a dangerous threshold, preventing electric shock or electrical fire. When the circuit breaker interrupts current, the high temperature of the electric arc generated between the contacts decomposes the insulating material in the arc-extinguishing chamber, producing arc-extinguishing gas to reduce the arc temperature and remove arc energy. However, if the arc-extinguishing gas is not discharged in time, it may cause a sudden increase in internal pressure of the circuit breaker, or even lead to an explosion.

[0039] A 1U circuit breaker refers to a circuit breaker with a height of 1U (1 Unit = 1.75 inches). Its compact design makes it suitable for high-density power distribution scenarios and space-constrained rack-mounted electrical equipment, such as data centers, distribution cabinets, and industrial control cabinets. Due to its compact internal design, the limited height and small internal space of a 1U circuit breaker make it difficult to vent the arc-quenching gas.

[0040] To address the problem that current 1U circuit breakers are not convenient for discharging arc-extinguishing gas, this utility model provides a leakage current detection module and a leakage current circuit breaker. The following describes in detail the overall structure, working principle, and technical effects of the leakage current detection module and leakage current circuit breaker provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0041] On the one hand, please refer to Figures 1-7 This utility model provides a leakage current detection module 100, which specifically includes a housing cover 110. Inside the housing cover 110 are an inlet terminal 130, a current transformer 140, an exhaust channel 150, and an outlet terminal 160. The inlet terminal 130, exhaust channel 150, and outlet terminal 160 are arranged along the height direction of the housing cover 110. A base 120 is provided inside the housing cover 110. The inlet terminal 130 is located on the uppermost layer of the base 120 and serves as the input terminal of the leakage current detection module 100. The outlet terminal 160 is located inside the housing cover 110 and is located on the lowermost layer. The outlet terminal 160 serves as the output terminal of the leakage current detection module 100. The exhaust channel 150 is located in the middle layer of the base 120, that is, the exhaust channel 150 is arranged between the inlet terminal 130 and the outlet terminal 160. One end of the exhaust channel 150 is connected to the channel at the tail of the circuit breaker body 200 located on the side of the leakage current detection module 100, and the other end of the exhaust channel 150 is connected to the atmosphere through the outer cover 110. The outer cover 110 is provided with an exhaust hole that communicates with the exhaust channel 150.

[0042] By arranging the inlet terminal 130, the exhaust channel 150, and the outlet terminal 160 along the height direction of the outer casing 110, the exhaust channel 150 is located between the inlet terminal 130 and the outlet terminal 160, making the internal functional areas of the leakage current detection module 100 clear and the flow path reasonable, facilitating gas circulation. Furthermore, the exhaust channel 150 is connected to the channel at the tail of the circuit breaker body 200, so that the exhaust channel 150 is used to discharge the arc-extinguishing gas generated inside the circuit breaker body 200, thereby improving the discharge effect of the arc-extinguishing gas and improving the problem that the arc-extinguishing gas inside the current 1U circuit breaker is not easy to discharge.

[0043] Please refer to Figures 2-5The current transformer 140 is disposed within the base 120. In some optional embodiments, the current transformer 140 is located between the inlet terminal 130 and the exhaust channel 150. In other optional embodiments, the current transformer 140 may also be located between the exhaust channel 150 and the outlet terminal 160. The specific location of the current transformer 140 can be selected according to the actual situation to improve the compatibility and applicability of the leakage current detection module 100.

[0044] Please refer to Figures 3-5 In this embodiment, the incoming terminal 130 includes a first plug-in plate 131 and a first plug-in strip 132 fixedly connected. The first plug-in strip 132 is used to plug into a plug-in plate (not shown in the figure) inside the circuit breaker body 200 to realize the connection between the leakage current detection module 100 and the incoming terminal of the circuit breaker body 200. The outgoing terminal 160 includes a second plug-in plate 161, a second plug-in strip 162 and a wire 163. One end of the wire 163 is connected to the second plug-in plate 161, and the other end of the wire 163 passes through the inner hole of the current transformer 140 and is connected to the second plug-in strip 162. The second plug-in strip 162 is used to plug into a plug-in plate (not shown in the figure) inside the circuit breaker body 200 to realize the connection between the leakage current detection module 100 and the outgoing terminal of the circuit breaker body 200. The conductor 163 is located in a position to facilitate the laying of the conductor 163. The conductor 163 is a flexible conductor 163. The flexible conductor 163 passes through the inner hole of the current transformer 140 to realize the collection of leakage current in the circuit.

[0045] Please refer to Figure 1 In some alternative embodiments, the length of the outer cover 110 is greater than the length of the base 120, and one side of the outer cover 110 and the base 120 together form a receiving cavity 111, combined with Figure 6 and Figure 7 The current transformer 140 is located inside the receiving cavity 111. By placing the current transformer 140 at one end of the base 120, and avoiding placing the current transformer 140 inside the base 120, the structural layout of the base 120 in the height direction is reduced, thereby reducing the height of the base 120 to meet the height requirements of the 1U circuit breaker.

[0046] Please refer to Figures 3-5 In order to facilitate the installation of the inlet terminal 130 and the outlet terminal 160, in this embodiment, a first receiving groove 121 for accommodating the inlet terminal 130 is provided on the base 120, and a second receiving groove 122 for accommodating the outlet terminal 160 is also provided on the base 120.

[0047] Please refer to Figures 3-5In this embodiment, multiple inlet terminals 130 are provided on the base 120, and multiple outlet terminals 160 are also provided on the base 120. In order to avoid interference between the multiple inlet terminals 130 and the multiple outlet terminals 160, a number of insulating partitions 123 are provided in the base 120. The uppermost insulating partition 123 of the base 120 is provided between adjacent inlet terminals 130 for phase-to-phase insulation of the multiple inlet terminals 130, and the lowermost insulating partition 123 of the base 120 is provided between adjacent outlet terminals 160 for phase-to-phase insulation of the multiple outlet terminals 160.

[0048] Please refer to Figure 3 In some optional embodiments, to facilitate the snap-fit ​​installation of the outer cover 110 and the base 120, a snap-fit ​​block (not shown in the attached drawings) is provided on the outer cover 110, and a snap-fit ​​groove 124 adapted to the snap-fit ​​block is provided on the base 120. When the outer cover 110 is snapped onto the base 120, the snap-fit ​​block is snapped into the snap-fit ​​groove 124 to achieve positioning of the outer cover 110 and the base 120.

[0049] On the other hand, please refer to Figure 1 and Figure 2 This utility model also provides a residual current circuit breaker, which includes a circuit breaker body 200, a residual current actuation module 300, and the aforementioned residual current detection module 100. An operating handle 210 is also provided on the circuit breaker body 200. The operating handle 210 and the residual current detection module 100 are distributed at both ends of the circuit breaker body 200 along its length. Both the circuit breaker body 200 and the residual current detection module 100 are located on one side of the residual current actuation module 300. Furthermore, the receiving cavity 111 of the outer cover 110 communicates with the interior of the residual current actuation module 300 to facilitate the electrical connection between the current transformer 140 and the control circuit board within the residual current actuation module 300.

[0050] For details, please refer to Figure 6 and Figure 7 The leakage current actuation module 300 has an upper housing 310 and a lower housing 320, which are interlocked. The length of the upper housing 310 is greater than the length of the lower housing 320, so that one end of the upper housing 310 extends beyond the lower housing 320, and the end of the upper housing 310 outside the lower housing 320 forms a hollow cavity 330. When the circuit breaker body 200, the leakage current detection module 100 and the leakage current actuation module 300 are assembled to form the leakage current circuit breaker provided by this utility model, the cavity 330 is connected to the receiving cavity 111. The current transformer 140 located in the receiving cavity 111 can extend into the cavity 330 to jointly accommodate the current transformer 140.

[0051] Furthermore, a connector 125 is provided on the base 120. The connector 125 is used to connect to the circuit breaker body 200 so that the leakage current detection module 100 can be installed at one end of the circuit breaker body 200. Specifically, the connector 125 can be a screw, clip, or other structure.

[0052] Furthermore, the outer cover 110 is adapted to the surface of the leakage current actuator module 300 so that the overall surface of the leakage current circuit breaker is flat and aesthetically pleasing, while also facilitating the positioning of the leakage current detection module 100 when it is installed on the circuit breaker body 200.

[0053] In summary, the implementation principle of the leakage current detection module 100 and leakage current circuit breaker provided by this utility model is as follows: by arranging the inlet terminal 130, the exhaust channel 150 and the outlet terminal 160 along the height direction of the outer casing 110, the exhaust channel 150 is located between the inlet terminal 130 and the outlet terminal 160, so that the internal functional partitions of the leakage current detection module 100 are clear and the flow path is reasonable, which facilitates gas circulation; in addition, the exhaust channel 150 is used to discharge the arc-extinguishing gas generated inside the circuit breaker body 200, so as to improve the discharge effect of the arc-extinguishing gas and improve the problem that the arc-extinguishing gas inside the current 1U circuit breaker is not easy to discharge.

[0054] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A leakage current detection module, comprising a housing cover, characterized in that: The housing cover has an inlet terminal, an exhaust channel, an outlet terminal, and a current transformer. The inlet terminal, the exhaust channel, and the outlet terminal are arranged along the height direction of the housing cover. The outer casing also has a base, the inlet end and the outlet end are respectively located on the uppermost and lowermost layers of the base, and the exhaust channel is located in the middle layer of the base; One end of the exhaust channel is connected to the circuit breaker body located on one side of the leakage current detection module, and the other end of the exhaust channel is connected to the atmosphere through the outer casing to discharge the arc-extinguishing gas generated inside the circuit breaker body.

2. The leakage detection module of claim 1, wherein, The current transformer is disposed within the base, and the current transformer is located between the inlet terminal and the exhaust channel; or... The current transformer is located between the exhaust channel and the outlet terminal.

3. The leakage detection module of claim 1, wherein, One end of the outer casing and the base together form a receiving cavity, and the current transformer is located inside the receiving cavity.

4. The leakage detection module of claim 1, wherein, The base is provided with a first receiving groove for accommodating the incoming line and a second receiving groove for accommodating the outgoing line.

5. The leakage detection module of claim 1, wherein, The base is provided with a plurality of insulating partitions, which are used to separate adjacent incoming terminals and adjacent outgoing terminals.

6. The leakage detection module of claim 1, wherein, The outer casing is provided with a snap-fit ​​block, and the base is provided with a snap-fit ​​groove that is adapted to the snap-fit ​​block.

7. An arc fault circuit interrupter, comprising: The device includes a circuit breaker body, a leakage current actuation module, and a leakage current detection module as described in any one of claims 1-6. The leakage current detection module is disposed at one end of the circuit breaker body, and both the circuit breaker body and the leakage current detection module are disposed on one side of the leakage current actuation module.

8. The ground fault circuit interrupter of claim 7, wherein, One end of the outer casing and the base together form a receiving cavity, and the current transformer is located inside the receiving cavity; The receiving cavity is internally connected to the leakage current execution module.

9. The ground fault circuit interrupter of claim 8, wherein, The leakage current actuator has a lower housing and an upper housing that are interlocked. The upper housing has a cavity extending beyond the lower housing. The cavity communicates with the receiving cavity, and the current transformer can extend into the cavity.

10. The ground fault circuit interrupter of claim 7, wherein, The base is provided with a connector for connecting to the circuit breaker body.

Images