Multi-loop safe electricity utilization monitoring device
By designing a multi-loop safe power consumption monitoring device, real-time collection and uploading power consumption data to the cloud platform, the problems of traditional equipment occupying a large area, difficulty in disassembly and assembly, and few monitoring loops are solved, and the comprehensive perception of power consumption status and the timely elimination of safety hazards are achieved, bringing users a safe power consumption environment.
Patent Information
- Application Number
- CN202421382886.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-06-17
AI Technical Summary
Traditional safe power monitoring equipment covers a large area, is difficult to disassemble and assemble, and has few monitoring circuits. It is impossible to eliminate power safety hazards in time, and it is impossible to provide home power safety situations to users who go out.
A multi-loop safe power consumption monitoring device is designed, including a voltage sampling module, a current sampling module, a signal processing module, a core processor module, a communication module, a display module and a power supply module, which can collect safe power consumption data of multiple user loops online in real time and upload the data to the cloud platform for centralized monitoring in real time.
It realizes a comprehensive perception of the power consumption status, accurately judges the safety management problems of electricity consumption, promptly eliminates the hidden dangers of safe electricity consumption, and brings users a safe electricity use environment. At the same time, the device is small in size, simple in structure, easy to install and disassemble, saving space and cost.
Smart Images
Figure CN223022232U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical safety, and particularly relates to a multi-loop safe power consumption monitoring device. Background Art
[0002] With the progress of technology, various high-power electrical equipment has continuously flooded into society. People's demand for electricity consumption is increasing, and power supply equipment often operates under overload. The power consumption environment has become increasingly harsh, and there are more and more potential safety hazards in the power distribution lines. Various fire accidents caused by power consumption safety problems emerge in an endless stream, and people's power consumption safety issues face great challenges. Traditional safe power consumption monitoring devices cover a large area, are difficult to disassemble and install, have few monitored loops, and cannot provide users who are out with the power consumption safety situation at home, and cannot timely eliminate potential safety hazards in home power consumption. Content of the Utility Model
[0003] In view of the above deficiencies in the prior art, the utility model provides a multi-loop safe power consumption monitoring device, which is mainly used for collecting data of power distribution lines. By collecting real-time online safe power consumption data of multiple user loops and uploading the data to the cloud platform in real time, centralized monitoring of each power consumption node is carried out, so as to comprehensively perceive the power consumption state, accurately judge power consumption safety management problems, timely eliminate potential safety hazards in home power consumption, and bring a safe power consumption environment to users.
[0004] In order to achieve the above utility model purpose, the technical scheme adopted by the utility model is as follows:
[0005] A multi-loop safe power consumption monitoring device includes a voltage sampling module, a current sampling module, a signal processing module, a core processor module, a communication module, a display module and a power supply module. The voltage sampling module is connected to the signal processing module, the current sampling module is connected to the signal processing module, the signal processing module is connected to the core processor module, the communication module is connected to the core processor module, the display module is connected to the core processor module, and the power supply module is respectively connected to the signal processing module, the core processor module, the communication module and the display module;
[0006] The voltage sampling module includes a plurality of sampling circuits connected to the power distribution lines of floor users;
[0007] The current sampling module includes a plurality of current transformers connected to the power distribution lines of floor users. Each current transformer is connected to a current sampling circuit, and the current sampling circuit is connected to the signal processing module.
[0008] Further, the sampling circuit includes a first sampling resistance module, a voltage transformer module, a current limiting resistance module and a common resistance module;
[0009] The first sampling resistor module includes sampling resistors R3, R6, and R9;
[0010] The voltage transformer module includes voltage transformers M1, M2, and M3;
[0011] The current-limiting resistor module includes current-limiting resistors R1, R2, R4, R5, R7, and R8;
[0012] The ordinary resistor module includes resistor R10;
[0013] One end of the current-limiting resistor R1 is the input terminal of the three-phase voltage UA. The other end of the current-limiting resistor R1 is connected to one end of the current-limiting resistor R2. The other end of the current-limiting resistor R2 is connected to the first input terminal of the primary coil of the voltage transformer M1. One end of the current-limiting resistor R4 is the input terminal of the three-phase voltage UB. The other end of the current-limiting resistor R4 is connected to one end of the current-limiting resistor R5. The other end of the current-limiting resistor R5 is connected to the first input terminal of the primary coil of the voltage transformer M2. One end of the current-limiting resistor R7 is the input terminal of the three-phase voltage UC. The other end of the current-limiting resistor R7 is connected to one end of the current-limiting resistor R8. The other end of the current-limiting resistor R8 is connected to the first input terminal of the primary coil of the voltage transformer M3. The second input terminals of the primary coils of the voltage transformers M1, M2, and M3 are the input terminals of the N-line voltage UN, and the second input terminals of the primary coils of the voltage transformers M1, M2, and M3 are connected to each other. The first input terminal of the secondary coil of the voltage transformer M1 is connected to one end of the sampling resistor R3 and is the output terminal of the input three-phase voltage VIN_A. The first input terminal of the secondary coil of the voltage transformer M2 is connected to one end of the sampling resistor R6 and is the output terminal of the input three-phase voltage VIN_B. The first input terminal of the secondary coil of the voltage transformer M3 is connected to one end of the sampling resistor R9 and is the output terminal of the input three-phase voltage VIN_C. The other end of the sampling resistor R3, the second input terminal of the secondary coil of the voltage transformer M1, the other end of the sampling resistor R6, the second input terminal of the secondary coil of the voltage transformer M2, the other end of the sampling resistor R9, the second input terminal of the secondary coil of the voltage transformer M3, and one end of the resistor R10 are connected to each other and grounded. The other end of the resistor R10 is the output terminal of the input N-line voltage VIN_N.
[0014] Further, the current sampling circuit includes a second sampling resistor module, an RC filter module, an overvoltage protection device D1, a filter capacitor module, and a current transformer CT1;
[0015] The RC filter module includes a first RC filter module and a second RC filter module;
[0016] The second sampling resistor module includes a sampling resistor R12 and a sampling resistor R13;
[0017] The first RC filter module includes a resistor R11 and a capacitor C2;
[0018] The second RC filter module includes a resistor R14 and a capacitor C4;
[0019] The filtering capacitors include a filtering capacitor C1 and a filtering capacitor C3;
[0020] The overvoltage protection device D1 includes a first diode and a second diode;
[0021] The first output terminal of the secondary coil of the current transformer CT1, the negative electrode of the first diode, the positive electrode of the second diode, one end of the sampling resistor R12, one end of the filtering capacitor C1, and one end of the resistor R11 are connected to each other. The second output terminal of the secondary coil of the current transformer CT1, the positive electrode of the first diode, the negative electrode of the second diode, one end of the sampling resistor R13, one end of the filtering capacitor C3, and one end of the resistor R14 are connected to each other. The other ends of the sampling resistor R12, the sampling resistor R13, the filtering capacitor C1, and the filtering capacitor C3 are connected to each other and grounded. The other end of the resistor R11 is connected to one end of the capacitor C2. The other end of the resistor R14 is connected to one end of the capacitor C4. The other ends of the capacitor C2 and the capacitor C4 are connected to each other and grounded.
[0022] Furthermore, the communication module includes a 100M LAN communication module and an RS485 bus communication module.
[0023] Furthermore, the current sampling module further includes a plurality of leakage current transformers connected to the power distribution lines of the floor users. Each leakage current transformer is connected to a leakage current sampling circuit, and the leakage current sampling circuit is connected to the signal processing module.
[0024] The present utility model has the following beneficial effects:
[0025] 1. A multi-loop safe electricity consumption monitoring device proposed by the present utility model is small in volume, simple in structure, and convenient for installation and disassembly;
[0026] 2. It can collect three-phase voltages and realize multi-channel current collection, that is, it can simultaneously realize the collection of 10-loop currents and 10 leakage amounts. By collecting the electricity consumption data of all users in the entire floor, it realizes the centralized monitoring of the electricity consumption of the floor users, saves space and cost, and is convenient and flexible to use;
[0027] 3. It is possible to set up a single device to achieve centralized and safe management of electricity consumption for floor users, capable of real-time monitoring, early warning, and hidden danger location, and realizing the linkage between property management and fire protection to promptly handle potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 FIG. is a schematic structural diagram of a multi-loop safe electricity consumption monitoring device proposed by the present utility model;
[0029] Figure 2 FIG. is a schematic structural diagram of a sampling circuit;
[0030] Figure 3 FIG. is a schematic diagram of circuit components of a sampling circuit;
[0031] Figure 4 FIG. is a schematic structural diagram of a current sampling circuit;
[0032] Figure 5 FIG. is a schematic diagram of circuit components of a current sampling circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0033] The following describes the specific embodiments of the present utility model to facilitate those skilled in the art of this technical field to understand the present utility model. However, it should be clear that the present utility model is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of this technical field, as long as various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, these changes are obvious, and all utility models created using the concept of the present utility model are within the scope of protection.
[0034] As Figure 1 shown, a multi-loop safe electricity consumption monitoring device includes a voltage sampling module, a current sampling module, a signal processing module, a core processor module, a communication module, a display module, and a power supply module. The voltage sampling module is connected to the signal processing module, the current sampling module is connected to the signal processing module, the signal processing module is connected to the core processor module, the communication module is connected to the core processor module, the display module is connected to the core processor module, and the power supply module is respectively connected to the signal processing module, the core processor module, the communication module, and the display module; the voltage sampling module includes a plurality of sampling circuits connected to the power distribution lines of floor users; the current sampling module includes a plurality of current transformers connected to the power distribution lines of floor users, each current transformer is connected to a current sampling circuit, and the current sampling circuit is connected to the signal processing module.
[0035] Specifically, the communication module includes a 100M LAN communication module and an RS485 bus communication module.
[0036] In this embodiment, the multi-loop safe electricity consumption monitoring device is used to collect the safe electricity consumption data of multiple user loops in real time and online, including voltage, current, residual current, power factor, active power, reactive power, apparent power, and electric energy, and upload these data to the cloud platform in real time, so as to conduct centralized monitoring of each electricity consumption node, thereby achieving a comprehensive perception of the electricity consumption situation, accurately judging the problems of safe electricity consumption management, and timely eliminating the potential safety hazards of household electricity consumption, thus bringing a safe electricity consumption environment to users. In addition, the present utility model provides a multi-loop safe electricity consumption monitoring device, which is small in size, simple in structure, and convenient for installation and disassembly. Specifically, as shown in Figure 1 shown, a voltage sampling module and a current sampling module are installed among the floor users. The voltage sampling module and the current sampling module are respectively connected to the wiring lines of the floor users, and are respectively used to collect three-phase voltage and current in real time and online. At the same time, a signal processing module, a core processor module, a communication module, a display module, and a power supply module are also installed, and the power supply module is used to provide stable and reliable power for the signal processing module, the core processor module, the communication module, and the display module respectively. Among them, the voltage sampling module is unidirectionally connected to the signal processing module, that is, the voltage sampling module inputs the collected three-phase voltage signal into the signal processing module to be converted into a digital signal; the current sampling module is unidirectionally connected to the signal processing module, that is, the current sampling module inputs the collected multiple currents into the signal processing module to be converted into a digital signal; the signal processing module is bidirectionally connected to the core processor module, that is, the signal processing module inputs the digital signal into the core processor module, and the core processor module conducts abnormal electricity consumption analysis on the received digital signal. At the same time, the core processor module transmits the control signal to the signal processing module, and controls the signal processing module to calibrate, initialize, and upload data; the core processor module is unidirectionally connected to the display module, that is, the abnormal electricity consumption analysis result is input into the display module to display the electricity consumption information and abnormal conditions of electrical equipment in real time; the core processor module is also bidirectionally connected to the communication module, that is, the abnormal electricity consumption analysis result (abnormal electricity consumption information of electrical equipment) is input into the communication module in real time to realize the monitoring and early warning of user electricity consumption safety and the positioning of potential hazards, as well as the linkage with property management and fire protection, and timely handle safety hazards. At the same time, the host computer transmits the control signal and the upgrade program to the core processor module through the communication module for equipment restart and program upgrade operations.
[0037] In addition, the signal processing module is centered around the V93 series computing chips, supports multiple power grid monitoring events, has low power consumption, and high measurement accuracy; the core processor module uses the ARM Cortex-M7 kernel, with a high-efficiency and powerful central core; the communication module includes a 100M LAN communication module and an RS485 bus communication module. The 100M LAN communication module is used to communicate with the host computer, and the RS485 bus communication module is used for data exchange with other terminal devices; the display module uses a 4-inch industrial-grade liquid crystal display, with clear display, low power consumption, and good stability; the power supply module includes an AC-DC conversion module and peripheral circuits. The peripheral circuits are used for power filtering to reduce interference signals. The AC-DC conversion module uses the LS10 series AC / DC converters, with a wide-range input adaptation ability of AC 86V - 300V / DC 95 - 400V, flexible layout, and high conversion rate.
[0038] As Figures 2 - 3 shown, Figure 2 Figure 1 is a schematic diagram of the sampling circuit structure. Figure 2 It can be seen from Figure 1 that the distribution lines A, B, C, and D on the user side of each floor are respectively connected to the sampling circuit. The sampling circuit is used to collect three-phase voltages and input the collected three-phase voltages into the signal processing module. Figure 3 Figure 2 is a schematic diagram of the circuit components of the sampling circuit.
[0039] Figure 3 As shown in Figure 2, the sampling circuit includes a first sampling resistor module, a voltage transformer module, and a current-limiting resistor module. The first sampling resistor module includes sampling resistors R3, R6, and R9, whose function is to provide appropriate sampling signals for the signal processing module; the current-limiting resistor module includes current-limiting resistors R1, R2, R4, R5, R7, and R8, whose function is to control the current magnitude; the voltage transformer module includes voltage transformers M1, M2, and M3. Voltage transformers M1, M2, and M3 are precision current-type voltage transformers, whose function is to provide rated working current for the sampling resistors.
[0040] Specifically, the sampling circuit includes a first sampling resistor module, a voltage transformer module, a current-limiting resistor module, and a common resistor module; the first sampling resistor module includes sampling resistors R3, R6, and R9; the voltage transformer module includes voltage transformers M1, M2, and M3; the current-limiting resistor module includes current-limiting resistors R1, R2, R4, R5, R7, and R8; the common resistor module includes resistor R10; one end of the current-limiting resistor R1 is the input end of the three-phase voltage UA, the other end of the current-limiting resistor R1 is connected to one end of the current-limiting resistor R2, the other end of the current-limiting resistor R2 is connected to the first input end of the primary coil of the voltage transformer M1, one end of the current-limiting resistor R4 is the input end of the three-phase voltage UB, the other end of the current-limiting resistor R4 is connected to one end of the current-limiting resistor R5, the other end of the current-limiting resistor R5 is connected to the first input end of the primary coil of the voltage transformer M2, one end of the current-limiting resistor R7 is the input end of the three-phase voltage UC, the other end of the current-limiting resistor R7 is connected to one end of the current-limiting resistor R8, the other end of the current-limiting resistor R8 is connected to the first input end of the primary coil of the voltage transformer M3, the second input ends of the primary coils of the voltage transformers M1, M2, and M3 are the input ends of the N-line voltage UN, and the second input ends of the primary coils of the voltage transformers M1, M2, and M3 are connected to each other. The first input end of the secondary coil of the voltage transformer M1 is connected to one end of the sampling resistor R3 and is the output end of the input three-phase voltage VIN_A. The first input end of the secondary coil of the voltage transformer M2 is connected to one end of the sampling resistor R6 and is the output end of the input three-phase voltage VIN_B. The first input end of the secondary coil of the voltage transformer M3 is connected to one end of the sampling resistor R9 and is the output end of the input three-phase voltage VIN_C. The other end of the sampling resistor R3, the second input end of the secondary coil of the voltage transformer M1, the other end of the sampling resistor R6, the second input end of the secondary coil of the voltage transformer M2, the other end of the sampling resistor R9, the second input end of the secondary coil of the voltage transformer M3, and one end of the resistor R10 are connected to each other and grounded. The other end of the resistor R10 is the output end of the input N-line voltage VIN_N.
[0041] In this embodiment, the three-phase voltages UA, UB, UC, and the N-line voltage UN are the inputs of the distribution line.
[0042] Specifically, the current sampling module further includes a plurality of leakage current transformers connected to the distribution lines of the floor users. Each leakage current transformer is connected to a leakage current sampling circuit, and the leakage current sampling circuit is connected to the signal processing module.
[0043] Such asFigures 4 - 5 As shown Figure 4 is a schematic diagram of the current sampling circuit structure Figure 4 it can be seen that 10 current sampling circuits and 10 current transformers are respectively connected in the power distribution lines of users 1 to 10. By increasing the number of current sampling channels, it is possible to collect the electricity consumption data of all users on the entire floor, saving space and cost, while being simple and convenient to install. And the collected multi-channel current input signal processing module. In addition, from Figure 4 it can also be seen that the current sampling module further includes 10 leakage current transformers and 10 leakage sampling circuits to collect 10 residual current signals, that is, to realize centralized monitoring of the electricity consumption of floor users, making the monitoring more convenient and flexible; Figure 5 is a schematic diagram of the circuit devices of the current sampling circuit Figure 5 the current sampling circuit in it includes a second sampling resistor module, an RC filter module, an overvoltage protection device D1, a filter capacitor module, and a current transformer CT1. The RC filter module includes a first RC filter module and a second RC filter module. The second sampling resistor module includes a sampling resistor R12 and a sampling resistor R13, and its function is to provide a stable sampling signal; the first RC filter module includes a resistor R11 and a capacitor C2, and its function is to limit current and protect the circuit; the second RC filter module includes a resistor R14 and a capacitor C4, and its function is to smooth filter; the filter capacitor includes a filter capacitor C1 and a filter capacitor C3, and its function is to filter out high-frequency components in the circuit; the overvoltage protection device D1 includes a first diode and a second diode, and its function is to protect the backend circuit; the current transformer CT1 is used to provide a sampling current for the current.
[0044] Specifically, the current sampling circuit includes a second sampling resistor module, an RC filter module, an overvoltage protection device D1, a filter capacitor module, and a current transformer CT1; the RC filter module includes a first RC filter module and a second RC filter module; the second sampling resistor module includes a sampling resistor R12 and a sampling resistor R13; the first RC filter module includes a resistor R11 and a capacitor C2; the second RC filter module includes a resistor R14 and a capacitor C4; the filter capacitors include a filter capacitor C1 and a filter capacitor C3; the overvoltage protection device D1 includes a first diode and a second diode; the first output end of the secondary coil of the current transformer CT1, the negative electrode of the first diode, the positive electrode of the second diode, one end of the sampling resistor R12, one end of the filter capacitor C1, and one end of the resistor R11 are connected to each other; the second output end of the secondary coil of the current transformer CT1, the positive electrode of the first diode, the negative electrode of the second diode, one end of the sampling resistor R13, one end of the filter capacitor C3, and one end of the resistor R14 are connected to each other; the other ends of the sampling resistor R12, the sampling resistor R13, the filter capacitor C1, and the filter capacitor C3 are connected to each other and grounded; the other end of the resistor R11 is connected to one end of the capacitor C2; the other end of the resistor R14 is connected to one end of the capacitor C4; the other ends of the capacitor C2 and the capacitor C4 are connected to each other and grounded.
[0045] In summary, a multi-loop safe electricity consumption monitoring device proposed by the present utility model is small in volume, simple in structure, and convenient for installation and disassembly; at the same time, it can collect three-phase voltages and achieve multi-loop current collection, that is, it can simultaneously collect the currents of 10 loops and 10 leakage amounts. By collecting the electricity consumption data of all users in the entire floor, the centralized monitoring of the electricity consumption of the floor users is realized, saving space and cost, and being convenient and flexible to use; in addition, the multi-loop safe electricity consumption monitoring device proposed by the present utility model can set a single device to realize the safe centralized management of the electricity consumption of the floor users, can monitor and give early warnings in real time and locate potential hazards, and realize the linkage between the property and the fire department to timely handle potential safety hazards.
[0046] In the present utility model, specific embodiments are used to elaborate on the principle and implementation manner of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.
[0047] Those of ordinary skill in the art will realize that the embodiments described herein are to assist the reader in understanding the principles of the present utility model, and it should be understood that the scope of protection of the present utility model is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific deformations and combinations that do not depart from the essence of the present utility model based on these technical revelations disclosed in the present utility model, and these deformations and combinations are still within the scope of protection of the present utility model.
Claims
1. A multi-circuit safe electricity monitoring device, characterized in that: It includes a voltage sampling module, a current sampling module, a signal processing module, a core processor module, a communication module, a display module and a power module. The voltage sampling module is connected to the signal processing module, the current sampling module is connected to the signal processing module, the signal processing module is connected to the core processor module, the communication module is connected to the core processor module, the display module is connected to the core processor module, and the power module is respectively connected to the signal processing module, the core processor module, the communication module and the display module; The voltage sampling module includes a plurality of sampling circuits connected to the power distribution lines of floor users; The current sampling module includes a plurality of current transformers connected to the power distribution lines of floor users, each current transformer is connected to a current sampling circuit, and the current sampling circuit is connected to the signal processing module.
2. The multi-circuit safe electricity monitoring device according to claim 1, characterized in that: The sampling circuit includes a first sampling resistor module, a voltage transformer module, a current limiting resistor module and a common resistor module; The first sampling resistor module includes a sampling resistor R3, a sampling resistor R6, and a sampling resistor R9; The voltage transformer module includes a voltage transformer M1, a voltage transformer M2, and a voltage transformer M3; The current limiting resistor module includes a current limiting resistor R1, a current limiting resistor R2, a current limiting resistor R4, a current limiting resistor R5, a current limiting resistor R7, and a current limiting resistor R8; The common resistance module includes a resistor R10; One end of the current limiting resistor R1 is the input end of the three-phase voltage UA, the other end of the current limiting resistor R1 is connected to one end of the current limiting resistor R2, the other end of the current limiting resistor R2 is connected to the first input end of the primary coil of the voltage transformer M1, one end of the current limiting resistor R4 is the input end of the three-phase voltage UB, the other end of the current limiting resistor R4 is connected to one end of the current limiting resistor R5, the other end of the current limiting resistor R5 is connected to the first input end of the primary coil of the voltage transformer M2, one end of the current limiting resistor R7 is the input end of the three-phase voltage UC, the other end of the current limiting resistor R7 is connected to one end of the current limiting resistor R8, the other end of the current limiting resistor R8 is connected to the first input end of the primary coil of the voltage transformer M3, the second input end of the primary coil of the voltage transformer M1, the second input end of the primary coil of the voltage transformer M2, and the second input end of the primary coil of the voltage transformer M3 are the input end of the N line voltage UN, and the second input end of the primary coil of the voltage transformer M1, the voltage transformer M2, and the voltage transformer M3 are the input end of the N line voltage UN. The second input end of the primary coil of the voltage transformer M2 and the second input end of the primary coil of the voltage transformer M3 are connected to each other, the first input end of the secondary coil of the voltage transformer M1 is connected to one end of the sampling resistor R3 and is the output end of the input three-phase voltage VIN_A, the first input end of the secondary coil of the voltage transformer M2 is connected to one end of the sampling resistor R6 and is the output end of the input three-phase voltage VIN_B, the first input end of the secondary coil of the voltage transformer M3 is connected to one end of the sampling resistor R9 and is the output end of the input three-phase voltage VIN_C, the other end of the sampling resistor R3, the second input end of the secondary coil of the voltage transformer M1, the other end of the sampling resistor R6, the second input end of the secondary coil of the voltage transformer M2, the other end of the sampling resistor R9, the second input end of the secondary coil of the voltage transformer M3, and one end of the resistor R10 are connected to each other and grounded, and the other end of the resistor R10 is the output end of the input N-line voltage VIN_N.
3. The multi-circuit safe electricity monitoring device according to claim 1, characterized in that: The current sampling circuit includes a second sampling resistor module, an RC filter module, an overvoltage protection device D1, a filter capacitor module, and a current transformer CT1; The RC filter module includes a first RC filter module and a second RC filter module; The second sampling resistor module includes a sampling resistor R12 and a sampling resistor R13; The first RC filter module includes a resistor R11 and a capacitor C2; The second RC filter module includes a resistor R14 and a capacitor C4; The filter capacitors include filter capacitor C1 and filter capacitor C3; The overvoltage protection device D1 includes a first diode and a second diode; The first output end of the secondary coil of the current transformer CT1, the cathode of the first diode, the anode of the second diode, one end of the sampling resistor R12, one end of the filter capacitor C1, and one end of the resistor R11 are connected to each other; the second output end of the secondary coil of the current transformer CT1, the anode of the first diode, the cathode of the second diode, one end of the sampling resistor R13, one end of the filter capacitor C3, and one end of the resistor R14 are connected to each other; the other end of the sampling resistor R12, the other end of the sampling resistor R13, the other end of the filter capacitor C1, and the other end of the filter capacitor C3 are connected to each other and grounded; the other end of the resistor R11 is connected to one end of the capacitor C2, the other end of the resistor R14 is connected to one end of the capacitor C4, and the other end of the capacitor C2 is connected to the other end of the capacitor C4 and grounded.
4. The multi-circuit safe electricity monitoring device according to claim 1, characterized in that: The communication modules include 100M LAN communication module and RS485 bus communication module.
5. The multi-circuit safe electricity monitoring device according to claim 1, characterized in that: The current sampling module also includes a plurality of leakage circuit mutual inductors connected to the power distribution lines of floor users, each leakage circuit mutual inductor is connected to a leakage sampling circuit, and the leakage sampling circuit is connected to the signal processing module.