Power regulator with leakage protection mechanism

Abstract

The utility model discloses an electric power regulator with a leakage protection mechanism, which relates to the technical field of electric power safety and comprises an electric power regulator body, the left surface of the electric power regulator body is fixedly connected with a lower shell, and an electromagnetic switch for leakage protection, a control mainboard and a zero sequence current transformer are arranged in the lower shell. The zero-sequence current transformer monitors a circuit in real time, no signal exists in the normal state, zero-sequence current is detected during electric leakage, an induction signal is generated, the signal is transmitted to the control main board and compared with a preset threshold value after being amplified and filtered, a control signal is triggered when the signal exceeds the threshold value, and the electromagnetic switch rapidly disconnects the circuit after receiving the signal. And the manual switch is arranged for manual reset or forced cut-off and is matched with the electromagnetic switch to realize automatic and manual dual protection, so that a power supply can be cut off quickly and effectively, personnel electric shock and equipment damage caused by electric leakage are avoided, and harm caused by electric leakage accidents is reduced to the greatest extent.

Description

Technical Field

[0001] This utility model relates to the field of power safety technology, and in particular to a power regulator with a leakage current protection mechanism. Background Technology

[0002] Power regulators with leakage current protection mechanisms are key equipment in industrial and civil power systems, primarily used to regulate voltage, current, and power parameters, and to ensure electrical safety through leakage current protection. This equipment is widely used in industrial heating, motor speed control, lighting control, and other fields, and its core structure typically includes:

[0003] 1. Drive circuit: Integrated into the control motherboard, it precisely controls the conduction and cutoff of the thyristor through pulse signals to ensure adjustment accuracy;

[0004] 2. Microprocessor control motherboard: Equipped with an ARM or DSP chip, it runs real-time algorithms to achieve leakage current threshold setting;

[0005] 3. Electromagnetic trip switch: driven by a bistable electromagnet, with a breaking speed in the millisecond range and a rated breaking capacity of over 50kA.

[0006] Currently, various design schemes have been adopted in the industry to achieve efficient operation of power regulators. Some manufacturers use modular designs, enabling functional expansion through standardized interfaces; others introduce intelligent control algorithms to improve regulation accuracy and response speed; still others optimize heat dissipation structures to extend the service life of the equipment.

[0007] However, the following problems still exist: some equipment does not integrate leakage protection function, requiring additional external protectors, which increases system complexity and cost; a single protection mechanism may malfunction or fail to operate due to component aging or signal interference; there is a lack of multiple protection measures; the protection structure of traditional power regulators is mostly a fixed design, and tools are needed to disassemble the protective net, resulting in long time consumption for internal component maintenance and cleaning. In order to address the above problems, this application proposes a power regulator with dual leakage protection and convenient maintenance design. By optimizing the protective net structure, maintenance efficiency is significantly improved. At the same time, a zero-sequence current transformer and electronic amplification circuit are integrated to realize multi-level detection and rapid response of leakage signals. Combined with the dual control of electromagnetic switch and manual switch, a multi-protection system combining automation and manual intervention is formed. This design can effectively solve the problems of complex maintenance, poor adaptability and insufficient safety redundancy of existing equipment, and improve the reliability and safety of the power system. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a power regulator with a leakage current protection mechanism. This solves the problems of some devices not integrating leakage current protection functions, requiring additional external protectors, increasing system complexity and cost, single protection mechanisms may malfunction or fail to operate due to component aging or signal interference, lack of multiple protection measures, and the fact that the protective structure of traditional power regulators is mostly a fixed design, requiring tools to disassemble the protective net.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A power regulator with a leakage current protection mechanism includes a power regulator body. A lower shell is fixedly connected to the left surface of the power regulator body. An electromagnetic switch for leakage current protection, a control board, and a zero-sequence current transformer are installed inside the lower shell. An upper shell is fixedly connected to the left surface of the lower shell by screws. Two protective nets for protecting internal components are movably engaged inside the upper shell. Two limit blocks for limiting the movement of the protective nets are also movably engaged inside the upper shell. A manual switch is installed inside the lower shell and is movably engaged with the upper shell.

[0011] Preferably, the upper shell surface has two slots, which are respectively engaged with two limiting blocks. The front surfaces of the two limiting blocks are fixedly connected with a return spring, which is fixedly connected to the two slots. The left surfaces of the two limiting blocks are fixedly connected with a push block.

[0012] Preferably, the front surfaces of both protective nets are provided with limiting grooves, and the two limiting grooves are respectively engaged with two limiting blocks. The left surface of the upper shell is provided with two sets of heat dissipation grooves. The electromagnetic switch, the control motherboard and the zero-sequence current transformer are all connected through a transmission line.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. During use, the zero-sequence current transformer monitors the circuit in real time. Under normal conditions, there is no signal. When leakage occurs, the zero-sequence current is detected and an induced signal is generated. The signal is transmitted to the control board, amplified and filtered, and compared with a preset threshold. If the limit is exceeded, a control signal is triggered. After receiving the signal, the electromagnetic switch quickly disconnects the circuit. A manual switch is also provided for manual reset or forced disconnection. Together with the electromagnetic switch, automatic and manual dual protection is achieved. The whole system can quickly and effectively cut off the power supply, avoid electric shock to personnel and damage to equipment due to leakage, and minimize the harm caused by leakage accidents.

[0015] 2. After prolonged use, dust accumulates on the surface of the protective net. Pushing the push block moves the fixed limit block together, compressing the return spring. At this time, the limit block will disengage from the limit groove opened on the protective net, opening the limit and allowing the protective net to be disassembled. The easy disassembly design facilitates later maintenance, prevents dust accumulation from affecting the heat dissipation of the equipment or causing a decline in electrical performance, and extends the service life of the equipment. Attached Figure Description

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is an overall structural diagram of the present invention;

[0018] Figure 2 This is a structural diagram of the lower shell of this utility model;

[0019] Figure 3 This is a structural diagram of the protective netting of this utility model;

[0020] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0021] Legend: 1. Power regulator body; 2. Lower shell; 3. Protective net; 4. Upper shell; 5. Electromagnetic switch; 6. Control main board; 7. Manual switch; 8. Zero-sequence current transformer; 9. Slot; 10. Limit slot; 11. Limit block; 12. Push block; 13. Reset spring; 14. Heat dissipation slot. Detailed Implementation

[0022] This application provides a power regulator with a leakage current protection mechanism, which effectively solves the problems of some devices not integrating leakage current protection functions, requiring additional external protectors, increasing system complexity and cost, single protection mechanisms may malfunction or fail to operate due to component aging or signal interference, lack of multiple protection measures, and the fact that the protection structure of traditional power regulators is mostly a fixed design, requiring tools to disassemble the protective net. By optimizing the protective net structure, maintenance efficiency is significantly improved. At the same time, it integrates a zero-sequence current transformer and an electronic amplification circuit to achieve multi-level detection and rapid response of leakage current signals. Combined with the dual control of electromagnetic switches and manual switches, it forms a multi-protection system that combines automation and manual intervention. This design can effectively solve the problems of complex maintenance, poor adaptability and insufficient safety redundancy of existing equipment, and improve the reliability and safety of the power system. Example

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application embodiment effectively solves the problems of some devices not integrating leakage protection function, requiring additional external protectors, increasing system complexity and cost, single protection mechanisms may malfunction or fail to operate due to component aging or signal interference, lack of multiple protection measures, and the fact that the protection structure of traditional power regulators is mostly a fixed design, requiring tools to disassemble the protective net. The overall approach is as follows:

[0024] To address the problems existing in the prior art, this utility model provides a power regulator with a leakage current protection mechanism, including a power regulator body 1. A lower shell 2 is fixedly connected to the left surface of the power regulator body 1. An electromagnetic switch 5 for leakage current protection, a control main board 6, and a zero-sequence current transformer 8 are installed inside the lower shell 2. An upper shell 4 is fixedly connected to the left surface of the lower shell 2 by screws. Two protective nets 3 for protecting internal components are movably engaged inside the upper shell 4. Two limiting blocks 11 for limiting the movement of the protective nets 3 are also movably engaged inside the upper shell 4. A manual switch 7 is installed inside the lower shell 2. The manual switch 7 is connected to... The upper shell 4 is movable and snapped together. During use, the zero-sequence current transformer 8 monitors the circuit in real time. Under normal conditions, there is no signal. When leakage occurs, the zero-sequence current is detected and an induced signal is generated. The signal is transmitted to the control main board 6, which is amplified and filtered and compared with a preset threshold. If the limit is exceeded, a control signal is triggered. After receiving the signal, the electromagnetic switch 5 quickly disconnects the circuit. A manual switch 7 is also provided for manual reset or forced disconnection. Together with the electromagnetic switch 5, automatic and manual dual protection is achieved. The whole system can quickly and effectively cut off the power supply, avoid electric shock to personnel and damage to equipment due to leakage, and minimize the harm caused by leakage accidents.

[0025] The upper shell 4 has two slots 9 on its surface, which are respectively engaged with two limit blocks 11. A return spring 13 is fixedly connected to the front surface of each of the two limit blocks 11, and the two return springs 13 are respectively fixedly connected to the two slots 9. A push block 12 is fixedly connected to the left surface of each of the two limit blocks 11. Limit grooves 10 are provided on the front surface of each of the two protective nets 3, and the two limit grooves 10 are respectively engaged with the two limit blocks 11. Two sets of heat dissipation slots 14 are provided on the left surface of the upper shell 4. The electromagnetic switch 5, the control main board 6, and the zero-sequence current transformer 8 are all connected via transmission lines. After prolonged use, dust accumulates on the surface of the protective nets 3. By pushing the push block 12, the fixed limit blocks 11 move together, compressing the return springs 13. At this time, the limit blocks 11 will disengage from the limit grooves 10 on the protective nets 3, opening the limit. The protective nets 3 can then be disassembled. This easy-to-disassemble design facilitates later maintenance, prevents dust accumulation from affecting heat dissipation or causing a decline in electrical performance, and extends the service life of the equipment.

[0026] Among them, the power regulator body 1 is the main body of the entire equipment, providing the installation foundation for other components and serving as the carrier for current regulation and leakage protection functions;

[0027] The lower shell 2 is used to house components such as the electromagnetic switch 5 and the control motherboard 6, and provides initial protection and support for the internal components;

[0028] The protective net 3 can protect the internal components of the power regulator, prevent foreign objects from entering, and is easy to disassemble, which is beneficial for later maintenance and equipment heat dissipation;

[0029] The upper shell 4 and the lower shell 2 work together to further protect the internal components and also provide installation space for the protective net 3, the limiting block 11, etc.

[0030] When the electromagnetic switch 5 sends a signal to the control board 6, it quickly disconnects the circuit to achieve automatic leakage protection and cut off the fault current.

[0031] The main control board 6 receives the signal from the zero-sequence current transformer 8, processes it, and controls the electromagnetic switch 5 to operate. It is the core component of the leakage protection control.

[0032] The manual switch 7 can be manually reset or forcibly cut off the circuit. When used with the electromagnetic switch 5, it provides both manual and automatic protection.

[0033] The zero-sequence current transformer 8 real-time monitoring circuit generates an induced signal when leakage occurs, providing a detection basis for leakage protection.

[0034] The slot 9 is used to engage with the limit block 11, which positions and installs the limit block 11, ensuring the fixation of the protective net 3.

[0035] The limiting groove 10 engages with the limiting block 11 to restrict the position of the protective net 3 and ensure that the protective net 3 stably protects the internal components;

[0036] The limiting block 11, in cooperation with the limiting groove 10 and the card slot 9, limits the protective net 3 to ensure that the protective net 3 functions properly;

[0037] The push block 12 facilitates the movement of the limit block 11, thereby enabling the disassembly of the protective net 3 and facilitating equipment maintenance;

[0038] The reset spring 13 keeps the limit block 11 in the normal limit position. It is compressed when the protective net 3 is removed, and the limit block 11 can be reset after being released.

[0039] The heat dissipation slot 14 is opened on the left surface of the upper shell 4 to increase the heat dissipation area, which is conducive to the dissipation of heat inside the power regulator and ensures the normal operation of the equipment.

[0040] Working principle:

[0041] During use, the zero-sequence current transformer 8 monitors the circuit in real time. Under normal conditions, there is no signal. When leakage occurs, the zero-sequence current is detected and an induced signal is generated. The signal is transmitted to the control main board 6, amplified and filtered, and compared with a preset threshold. If the threshold is exceeded, a control signal is triggered. The electromagnetic switch 5 receives the signal and quickly disconnects the circuit. A manual switch 7 is also provided for manual reset or forced disconnection. Together with the electromagnetic switch 5, automatic and manual dual protection is achieved. The whole system can quickly and effectively cut off the power supply, avoiding electric shock to personnel and damage to equipment due to leakage, and minimizing the harm caused by leakage accidents. After long-term use, dust accumulates on the surface of the protective net 3. By pushing the push block 12, the fixed limit block 11 moves together, compressing the reset spring 13. At this time, the limit block 11 will disengage from the limit groove 10 opened on the protective net 3, opening the limit. The protective net 3 can then be disassembled. The easy-to-disassemble design facilitates later maintenance, prevents dust accumulation from affecting the heat dissipation of the equipment or causing a decline in electrical performance, and extends the service life of the equipment.

[0042] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A power regulator with a leakage current protection mechanism, comprising a power regulator body (1), characterized in that, The lower shell (2) is fixedly connected to the left surface of the power regulator body (1). The lower shell (2) is equipped with an electromagnetic switch (5) for leakage protection, a control board (6) and a zero-sequence current transformer (8). The upper shell (4) is fixedly connected to the left surface of the lower shell (2) by screws. The upper shell (4) has two protective nets (3) for protecting internal components, and two limiting blocks (11) for limiting the protective nets (3) are also connected inside the upper shell (4). A manual switch (7) is provided inside the lower shell (2).

2. A power regulator with a leakage current protection mechanism as described in claim 1, characterized in that: The manual switch (7) is movably engaged with the upper shell (4).

3. A power regulator with a leakage current protection mechanism as described in claim 1, characterized in that: Two slots (9) are provided on the surface of the upper shell (4); The two slots (9) are respectively engaged with the two limiting blocks (11).

4. A power regulator with a leakage current protection mechanism as described in claim 3, characterized in that: A reset spring (13) is fixedly connected to the front surface of both limiting blocks (11); The two reset springs (13) are fixedly connected to the two slots (9) respectively.

5. A power regulator with a leakage current protection mechanism as described in claim 1, characterized in that: Push blocks (12) are fixedly connected to the left surface of both limiting blocks (11).

6. A power regulator with a leakage current protection mechanism as described in claim 1, characterized in that: Limiting grooves (10) are provided on the front surface of both protective nets (3); The two limiting slots (10) are respectively engaged with the two limiting blocks (11).

7. A power regulator with a leakage current protection mechanism as described in claim 1, characterized in that: The upper shell (4) has two sets of heat dissipation grooves (14) on its left surface.

8. A power regulator with a leakage current protection mechanism as described in claim 1, characterized in that: The electromagnetic switch (5), the control board (6), and the zero-sequence current transformer (8) are all connected through a transmission line.

Images