An electric leakage protection device for smart metering switch

Abstract

The utility model discloses a kind of leakage protection devices for intelligent measurement switch, including shell, the upper surface of the shell is fixedly embedded with heat dissipation component, the inner wall of the shell is respectively fixedly installed with zero sequence current transformer, voltage sensor and relay, the zero sequence current transformer and voltage sensor are all located above the relay, the inner wall of the shell is fixedly installed with microprocessor, the inner wall of the shell is fixedly installed with threading positioning plate, the inner wall of the shell is fixedly installed with temperature sensor, the inner wall of the shell is fixedly installed with wireless communication chip, the heat dissipation component includes the heat dissipation cover of shell upper surface fixedly embedded, the upper surface of the heat dissipation cover is fixedly embedded with circular cover.This leakage protection device, realize overvoltage, under voltage, open-phase multiple protection function, can satisfy modern power diversification demand, response speed is faster, effectively reduce the security risk caused by leakage, provide more reliable guarantee for power safety.

Description

Technical Field

[0001] This utility model relates to the field of intelligent measuring switches, and in particular to a leakage current protection device for intelligent measuring switches. Background Technology

[0002] As a core component of smart grids and smart homes, smart metering switches need to have functions such as electricity data monitoring, remote control, and fault protection. Their application scenarios cover residential, industrial, and commercial fields, and are directly related to electricity safety and energy efficiency management. Leakage risk is one of the core safety issues of smart metering switches.

[0003] Currently, intelligent measurement switches typically use traditional residual current circuit breakers (RCCBs) for leakage protection. However, while traditional RCCBs can provide basic leakage protection, they are insufficient in terms of intelligence, accuracy, and reliability, making it difficult to meet the needs of modern electrical environments and reducing safety during electricity use. Therefore, we propose a leakage protection device for intelligent measurement switches to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a leakage current protection device for intelligent measuring switches to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A leakage current protection device for an intelligent measuring switch includes a housing. A heat dissipation component is fixedly embedded on the upper surface of the housing. A zero-sequence current transformer, a voltage sensor, and a relay are fixedly installed on the inner wall of the housing, with the zero-sequence current transformer and voltage sensor located above the relay. A microprocessor, a wire positioning plate, a temperature sensor, and a wireless communication chip are fixedly installed on the inner wall of the housing.

[0007] In a further embodiment, the heat dissipation assembly includes a heat dissipation shroud fixedly embedded on the upper surface of the housing, a circular cover fixedly embedded on the upper surface of the heat dissipation shroud, a heat dissipation fan fixedly installed on the inner wall of the circular cover, and a protective mesh plate threadedly connected to the inner wall of the circular cover.

[0008] In a further embodiment, two air inlets are provided on the outer surface of the housing, and dust filter plates are fixedly installed on the inner walls of both air inlets.

[0009] In a further embodiment, two sets of mounting members are fixedly installed on the outer surface of the housing, and mounting holes are provided on the outer surface of both sets of mounting members.

[0010] In a further embodiment, the outer surface of the housing is provided with an operating hole, and the inner wall of the operating hole is hinged with two operating doors by a pin. The outer surface of the housing is provided with two upper wire holes and two lower wire holes respectively.

[0011] In a further embodiment, a PLC controller is fixedly mounted on the outer surface of the housing. The zero-sequence current transformer, voltage sensor, and temperature sensor are all electrically connected to the microprocessor via wires. The microprocessor is electrically connected to the PLC controller via wires, and the PLC controller is electrically connected to the cooling fan via wires.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention, through the combination of a zero-sequence current transformer and a microprocessor, can accurately identify milliampere-level leakage current. Simultaneously, the microprocessor can perform real-time data analysis and quickly determine leakage faults by combining preset thresholds. An integrated voltage sensor inside the housing can collect circuit voltage data in real time, and the microprocessor also compares the collected voltage values ​​with preset thresholds. Once voltage and leakage abnormalities are detected, the PLC controller immediately triggers a relay to cut off the power supply, achieving multiple protection functions including overvoltage, undervoltage, and phase loss. This meets the diverse needs of modern electricity use, offers a faster response speed compared to traditional devices, effectively reduces safety risks caused by leakage, and provides more reliable protection for electrical safety. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a leakage current protection device used for intelligent measuring switches, viewed from the front.

[0015] Figure 2 A frontal sectional view of a leakage current protection device used for intelligent measuring switches;

[0016] Figure 3 A top sectional view of a leakage current protection device used in intelligent measuring switches;

[0017] Figure 4 This is a top-view three-dimensional structural diagram of the heat dissipation component in a leakage current protection device used for intelligent measuring switches.

[0018] In the diagram: 1. Housing; 2. Heat dissipation assembly; 201. Heat sink cover; 202. Circular cover; 203. Cooling fan; 204. Protective mesh plate; 3. PLC controller; 4. Zero-sequence current transformer; 5. Voltage sensor; 6. Microprocessor; 7. Relay; 8. Wiring positioning plate; 9. Lower wiring hole; 10. Wireless communication chip; 11. Temperature sensor; 12. Air inlet; 13. Dust filter plate; 14. Mounting component; 15. Mounting hole; 16. Control hole; 17. Control door; 18. Upper wiring hole. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4In this utility model, a leakage current protection device for an intelligent measuring switch includes a housing 1. A heat dissipation assembly 2 is fixedly embedded on the upper surface of the housing 1. A zero-sequence current transformer 4, a voltage sensor 5, and a relay 7 are fixedly installed on the inner wall of the housing 1, with the zero-sequence current transformer 4 and voltage sensor 5 located above the relay 7. A microprocessor 6 is fixedly installed on the inner wall of the housing 1. A wire guide plate 8 is fixedly installed on the inner wall of the housing 1. A temperature sensor 11 is fixedly installed on the inner wall of the housing 1. A wireless communication chip 10 is fixedly installed on the inner wall of the housing 1. A PLC controller 3 is fixedly installed on the outer surface of the housing 1. The zero-sequence current transformer 4, voltage sensor 5, and temperature sensor 11 are all electrically connected to the microprocessor 6 via wires. The microprocessor 6 is electrically connected to the PLC controller 3 via wires. The PLC controller 3 is electrically connected to the cooling fan 203 via wires. The wireless communication chip 10 supports communication methods such as Wi-Fi and can transmit data such as leakage status, voltage value, and temperature value processed by the microprocessor 6 to the cloud or user terminal in real time. Users can remotely view the equipment's operating status and receive fault alarm information through mobile APP and other devices, and can also remotely control the relay 7 to achieve intelligent power management, providing users with a more convenient and efficient user experience. In addition, the electrical components in this application are all common electrical devices in the prior art. This application will not elaborate on their models or internal structures. The circuit structure is a common and mature technology. Those skilled in the art can select appropriate circuit components to build the circuit according to the power requirements and control requirements of the equipment.

[0023] In a further embodiment, the heat dissipation assembly 2 includes a heat dissipation shroud 201 fixedly embedded on the upper surface of the housing 1, a circular cover 202 fixedly embedded on the upper surface of the heat dissipation shroud 201, a cooling fan 203 fixedly installed on the inner wall of the circular cover 202, and a protective mesh plate 204 threadedly connected to the inner wall of the circular cover 202. Two air inlets 12 are opened on the outer surface of the housing 1, and dust filter plates 13 are fixedly installed on the inner walls of the two air inlets 12. The internal temperature of the housing 1 can be sensed by the temperature sensor 11. When the temperature exceeds a preset threshold, the microprocessor 6 starts the cooling fan 203 through the PLC controller 3. Together with the dust filter plates 13 of the air inlets 12 and the heat dissipation shroud 201, a high-efficiency heat dissipation cycle is formed, which not only avoids component failure caused by high temperature, but also improves the operational reliability.

[0024] In a further embodiment, two sets of mounting members 14 are fixedly installed on the outer surface of the housing 1. The outer surface of both sets of mounting members 14 is provided with mounting holes 15. The outer surface of the housing 1 is provided with a control hole 16. The inner wall of the control hole 16 is hinged with two control doors 17 by a pin. The outer surface of the housing 1 is provided with two upper wire holes 18 and two lower wire holes 9. The housing 1 can be installed and fixed by the mounting members 14 and the mounting holes 15. The opening of the control doors 17 at the control hole 16 facilitates the inspection and maintenance of the inside of the housing 1. The two upper wire holes 18 and the two lower wire holes 9 facilitate wiring.

[0025] The working principle of this utility model is as follows: Under normal operation, the vector sum of the currents of the live wire and the neutral wire in the circuit is zero, and the zero-sequence current transformer 4 has no induced signal output. When leakage occurs, the live wire current flows into the ground through the leakage path, causing the vector sum of the currents of the live wire and the neutral wire to be non-zero. The zero-sequence current transformer 4 induces a leakage current signal and transmits the analog signal to the microprocessor 6. Meanwhile, the voltage sensor 5 collects the circuit voltage data in real time and transmits it to the microprocessor 6. When a voltage abnormality is detected, such as overvoltage, undervoltage, or phase loss, the microprocessor 6 determines whether to trigger the protection mechanism based on a preset threshold. The microprocessor 6 receives and processes the real-time data from the zero-sequence current transformer 4 and the voltage sensor 5. The microprocessor 6 sends a control command to the PLC controller 3 through a digital signal. The PLC controller 3 triggers the relay 7 to cut off the main circuit power supply, thereby realizing leakage protection or voltage abnormality protection.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this 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.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A leakage current protection device for an intelligent measuring switch, characterized in that: The device includes a housing (1), on the upper surface of which a heat dissipation assembly (2) is fixedly embedded. A zero-sequence current transformer (4), a voltage sensor (5), and a relay (7) are fixedly installed on the inner wall of the housing (1). The zero-sequence current transformer (4) and the voltage sensor (5) are both located above the relay (7). A microprocessor (6) is fixedly installed on the inner wall of the housing (1). A wire positioning plate (8) is fixedly installed on the inner wall of the housing (1). A temperature sensor (11) is fixedly installed on the inner wall of the housing (1). A wireless communication chip (10) is fixedly installed on the inner wall of the housing (1).

2. The leakage current protection device for an intelligent measuring switch according to claim 1, characterized in that: The heat dissipation assembly (2) includes a heat dissipation cover (201) fixedly embedded on the upper surface of the housing (1), a circular cover (202) fixedly embedded on the upper surface of the heat dissipation cover (201), a heat dissipation fan (203) fixedly installed on the inner wall of the circular cover (202), and a protective mesh plate (204) threadedly connected to the inner wall of the circular cover (202).

3. The leakage current protection device for an intelligent measuring switch according to claim 1, characterized in that: Two air inlets (12) are provided on the outer surface of the housing (1), and dust filter plates (13) are fixedly installed on the inner walls of the two air inlets (12).

4. A leakage current protection device for an intelligent measuring switch according to claim 1, characterized in that: Two sets of mounting parts (14) are fixedly installed on the outer surface of the housing (1), and mounting holes (15) are opened on the outer surface of both sets of mounting parts (14).

5. A leakage current protection device for an intelligent measuring switch according to claim 1, characterized in that: The outer surface of the housing (1) is provided with an operating hole (16), and the inner wall of the operating hole (16) is hinged with two operating doors (17) by a pin. The outer surface of the housing (1) is provided with two upper wire holes (18) and two lower wire holes (9).

6. A leakage current protection device for an intelligent measuring switch according to claim 1, characterized in that: A PLC controller (3) is fixedly installed on the outer surface of the housing (1). The zero-sequence current transformer (4), voltage sensor (5) and temperature sensor (11) are all electrically connected to the microprocessor (6) through wires. The microprocessor (6) is electrically connected to the PLC controller (3) through wires. The PLC controller (3) is electrically connected to the cooling fan (203) through wires.

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