Leakage protection controller based on output leakage switch control signal
By designing a leakage protection controller based on output leakage switch control signal, and using electronic switches to detect and power outage of leakage current, the problems of complex leakage protection controllers, large space and short service life of mechanical switches in the prior art are solved, and the leakage protection effect with smaller volume and higher reliability is achieved.
Patent Information
- Application Number
- CN202421567225.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-03
AI Technical Summary
When used in conjunction with mechanical switches, the control method is complex, the space occupies a large amount of mechanical switches, and the service life of the mechanical switch is short, which poses safety hazards. Especially in equipment with small space, a smaller volume of leakage protection controller is required.
A leakage protection controller based on output leakage switch control signal is designed, and a leakage detection unit, processing unit and output control unit are used to detect, process and power outage of leakage current through electronic switches (a power outage system composed of output control unit and power supply equipment part).
It achieves smaller installation volume, simpler assembly, lower cost and higher reliability, and improves application safety for electrical equipment and personnel.
Smart Images
Figure CN222884334U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of leakage protection, in particular to a leakage protection controller based on outputting a leakage switch control signal. Background Art
[0002] The leakage protection controller is referred to as the leakage switch, also known as the leakage circuit breaker. It is mainly used to protect the equipment from leakage faults and personal electric shock that is fatal. It has overload and short-circuit protection functions. It can be used to protect the line or motor from overload and short circuit. It can also be used as an infrequent switching start of the line under normal circumstances.
[0003] At present, leakage protection controllers are widely used in various power transmission systems in combination with mechanical switches. The leakage protection controller controls the mechanical switch to realize abnormal leakage power off at the load end, thereby protecting the safety of electrical equipment and personnel. The inventor of this application found through field use research that the existing mechanical switch control method is complex, occupies a large space, and has defects such as short mechanical switch life, which leaves hidden dangers for the safety of electrical equipment and personnel; especially the existing portable mobile power supply, UPS power supply, solar home storage, generator set, etc., which have narrow space and require a smaller leakage protection controller. At the same time, the disconnection of its output power supply is not only disconnected by the mechanical circuit breaker, but also can be disconnected by its internal control circuit, which can reduce the cost and space of the entire system. Utility Model Content
[0004] In view of the technical problems that when the existing leakage protection controller is used in combination with a mechanical switch in various power transmission systems, there are defects such as complex mechanical switch control method, large space occupied, and short mechanical switch life, which leave hidden dangers to the safety of electrical equipment and personnel, the utility model provides a leakage protection controller based on outputting a leakage switch control signal.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A leakage protection controller based on outputting a leakage switch control signal comprises a leakage detection unit, a processing unit and an output control unit. The leakage detection unit is adapted to transmit a leakage detection signal to the processing unit when a leakage current is detected on a power transmission line. The processing unit comprises a leakage processing unit. The leakage processing unit processes the leakage detection signal transmitted by the leakage detection unit and then outputs a detection control signal. The output control unit triggers conduction according to the detection control signal to output a power-off signal to a power supply device to cut off the power output and complete the power-off action.
[0007] Compared with the prior art, the leakage protection controller based on the output leakage switch control signal provided by the utility model replaces the traditional mechanical switch with an electronic switch (a power-off system composed of an output control unit and a power supply device). When there is leakage current in the power transmission line, the leakage protection controller detects, processes, and triggers the electronic switch to cut off the power, that is, the leakage protection controller outputs a power-off signal after detection, processing, and triggering to directly control the existing power supply device to cut off the power output and thus complete the power off. Therefore, the leakage protection controller has a smaller installation volume, simpler assembly, lower cost, and higher reliability, which improves the application safety of electrical equipment and personnel.
[0008] Furthermore, the detection unit is a current transformer installed on the power transmission line.
[0009] Further, the output control unit includes a leakage output control unit, a resistor R* and an optocoupler U6. The leakage output control unit includes a diode D3, a diode D3*, a diode D6, a thyristor Q4, a resistor R13 and a capacitor C5. The anode of the diode D3 is connected to the cathode of the input end of the optocoupler U6 through the resistor R*. The anode of the input end of the optocoupler U6 is connected to the live wire of the power transmission through the terminal J1. The output end of the optocoupler U6 provides a power-off signal to the power supply device through the terminal J2. The cathode of the diode D3 is connected to the anode of the diode D3*. The cathode of the diode D3* is connected to the anode of the diode D6. The cathode of the diode D6 is connected to the anode of the thyristor Q4. The control electrode of the thyristor Q4 is connected to the leakage processing unit through the resistor R13. The cathode of the thyristor Q4 and one end of the capacitor C5 are grounded. The other end of the capacitor C5 is connected to the line between the control electrode of the thyristor Q4 and the resistor R13.
[0010] Furthermore, the processing unit also includes a self-diagnosis processing unit, and the output control unit also includes a self-diagnosis output control unit, and the self-diagnosis output control unit includes a diode D2, a thyristor Q3, a resistor R10 and a capacitor C4, the positive electrode of the diode D2 is connected to the line between the diode D3 and the resistor R*, the negative electrode of the diode D2 is connected to the anode of the thyristor Q3, the control electrode of the thyristor Q3 is connected to the self-diagnosis processing unit through the resistor R10, the cathode of the thyristor Q3 and one end of the capacitor C4 are grounded, and the other end of the capacitor C4 is connected to the line between the control electrode of the thyristor Q3 and the resistor R10. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The utility model provides a principle block diagram of a leakage protection controller based on outputting a leakage switch control signal. DETAILED DESCRIPTION
[0012] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.
[0013] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0014] Please refer to Figure 1 As shown, the utility model provides a leakage protection controller based on outputting a leakage switch control signal, comprising a leakage detection unit, a processing unit and an output control unit, wherein the leakage detection unit is suitable for transmitting a detection leakage signal to the processing unit when a leakage current is detected on a power transmission line, and the processing unit can be specifically implemented by a microcontroller (MCU) of the existing model FM2152, wherein the processing unit includes a leakage processing unit, wherein the leakage processing unit processes the detection leakage signal transmitted by the leakage detection unit and then outputs a detection control signal, wherein the output control unit triggers conduction according to the detection control signal to output a power-off signal to an existing power supply device to cut off the power output and complete the power-off action, and the existing power supply device can specifically be a generator, a photovoltaic inverter power supply, a mobile power supply, an energy storage inverter power supply, a UPS power supply, etc.
[0015] Compared with the prior art, the leakage protection controller based on the output leakage switch control signal provided by the utility model replaces the traditional mechanical switch with an electronic switch (a power-off system composed of an output control unit and a power supply device). When there is leakage current in the power transmission line, the leakage protection controller detects, processes, and triggers the electronic switch to cut off the power, that is, the leakage protection controller outputs a power-off signal after detection, processing, and triggering to directly control the existing power supply device to cut off the power output and thus complete the power off. Therefore, the leakage protection controller has a smaller installation volume, simpler assembly, lower cost, and higher reliability, which improves the application safety of electrical equipment and personnel.
[0016] As a specific example, please refer to Figure 1 As shown, the detection unit is a current transformer (CT) installed on the power transmission line, so that the leakage current on the power transmission line can be sensed and detected by the current transformer and a leakage detection signal can be output.
[0017] As a specific example, please refer to Figure 1 As shown, the output control unit includes a leakage output control unit, a resistor R* and an optocoupler U6. The leakage output control unit includes a diode D3, a diode D3*, a diode D6, a thyristor Q4, a resistor R13 and a capacitor C5. The anode of the diode D3 is connected to the cathode of the input end of the optocoupler U6 through the resistor R*. The anode of the input end of the optocoupler U6 is connected to the power transmission live wire (LINE live) through the terminal J1. The output end of the optocoupler U6 provides a power-off signal to the power supply device through the terminal J2. The cathode of the diode D3 is connected to the anode of the diode D3*, the cathode of the diode D3* is connected to the anode of the diode D6, the cathode of the diode D6 is connected to the anode of the thyristor Q4, the control electrode of the thyristor Q4 is connected to the leakage processing unit through the resistor R13, the cathode of the thyristor Q4 and one end of the capacitor C5 are grounded, and the other end of the capacitor C5 is connected to the line between the control electrode of the thyristor Q4 and the resistor R13. Using the output control unit in this embodiment, when the leakage processing unit in the processing unit outputs a detection control signal, the detection control signal will trigger the thyristor Q4 to turn on through the resistor R13, and then the diode D3, the diode D3*, and the diode D6 in the leakage output control unit will turn on, and finally the optocoupler U6 will be triggered to turn on. The output end of the optocoupler U6 outputs a power-off signal through the terminal J2 to provide it to the power supply device to cut off the power output, thereby completing the power-off action.
[0018] As a specific example, please refer to Figure 1As shown, the processing unit also includes a self-diagnosis processing unit, and the output control unit also includes a self-diagnosis output control unit, and the self-diagnosis output control unit includes a diode D2, a thyristor Q3, a resistor R10 and a capacitor C4, the positive electrode of the diode D2 is connected to the line between the diode D3 and the resistor R*, the negative electrode of the diode D2 is connected to the anode of the thyristor Q3, the control electrode of the thyristor Q3 is connected to the self-diagnosis processing unit in the processing unit through the resistor R10, the cathode of the thyristor Q3 and one end of the capacitor C4 are grounded, and the other end of the capacitor C4 is connected to the line between the control electrode of the thyristor Q3 and the resistor R10. By using the self-diagnosis processing unit and self-diagnosis output control unit in this embodiment, when the leakage detection unit, leakage processing unit or leakage output control unit is abnormal and cannot complete the corresponding function, the self-diagnosis processing unit can output a self-diagnosis control signal through the resistor R10 to trigger the thyristor Q3 to turn on, and then the self-diagnosis output control unit and the optical coupler U6 are turned on successively, and the output end of the optical coupler U6 outputs a power-off signal through the terminal J2 to provide the power supply device to cut off the power output to complete the power-off action. In addition, the optical coupler U6 in this embodiment can also be replaced by components such as thyristors, triodes, MOS tubes, and such equivalent replacements are also covered within the protection scope of this application.
[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A leakage protection controller based on outputting a leakage switch control signal, characterized in that: It includes a leakage detection unit, a processing unit and an output control unit. The leakage detection unit is suitable for transmitting a leakage detection signal to the processing unit when a leakage current is detected on the power transmission line. The processing unit includes a leakage processing unit. The leakage processing unit processes the leakage detection signal transmitted by the leakage detection unit and outputs a detection control signal. The output control unit triggers the conduction according to the detection control signal to output a power-off signal to the power supply device to cut off the power output and complete the power-off action.
2. The leakage protection controller based on outputting leakage switch control signal according to claim 1, characterized in that: The detection unit is a current transformer installed on the power transmission line.
3. The leakage protection controller based on outputting leakage switch control signal according to claim 1, characterized in that: The output control unit includes a leakage output control unit, a resistor R* and an optocoupler U6. The leakage output control unit includes a diode D3, a diode D3*, a diode D6, a thyristor Q4, a resistor R13 and a capacitor C5. The anode of the diode D3 is connected to the cathode of the input end of the optocoupler U6 through the resistor R*. The anode of the input end of the optocoupler U6 is connected to the live wire of the power transmission through the terminal J1. The output end of the optocoupler U6 provides a power-off signal to the power supply device through the terminal J2. The cathode of the diode D3 is connected to the anode of the diode D3*. The cathode of the diode D3* is connected to the anode of the diode D6. The cathode of the diode D6 is connected to the anode of the thyristor Q4. The control electrode of the thyristor Q4 is connected to the leakage processing unit through the resistor R13. The cathode of the thyristor Q4 and one end of the capacitor C5 are grounded. The other end of the capacitor C5 is connected to the line between the control electrode of the thyristor Q4 and the resistor R13.
4. The leakage protection controller based on outputting leakage switch control signal according to claim 3, characterized in that: The processing unit further includes a self-diagnosis processing unit, and the output control unit further includes a self-diagnosis output control unit, which includes a diode D2, a thyristor Q3, a resistor R10 and a capacitor C4, wherein the positive electrode of the diode D2 is connected to the line between the diode D3 and the resistor R*, the negative electrode of the diode D2 is connected to the anode of the thyristor Q3, the control electrode of the thyristor Q3 is connected to the self-diagnosis processing unit through the resistor R10, the cathode of the thyristor Q3 and one end of the capacitor C4 are grounded, and the other end of the capacitor C4 is connected to the line between the control electrode of the thyristor Q3 and the resistor R10.