Electronic tripping device

Abstract

The utility model relates to the technical field of circuit breakers, in particular to an electronic tripping device, which is characterized in that a current signal and a voltage signal of a circuit breaker are respectively acquired through a current sampling module and a voltage sampling module, and an electric energy metering module is used for calculating the current signal and the voltage signal to obtain a power measurement result and an electric energy measurement result; the protection calculation module calculates the current signal and the voltage signal to obtain a protection calculation result, the processor sends a trip coil activation instruction to the input and output control module when the protection calculation result is that a protection action is generated, and the input and output control module activates the trip coil after receiving the trip coil activation instruction. According to the electronic tripping device, metering and protection functions of the circuit breaker are realized, the electronic tripping device is relatively simple in structure, the size of a circuit board is reduced, the overall cost is reduced, and the reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to an electronic tripping device. Background Art

[0002] In power systems, low-voltage circuit breakers are at the heart of circuit protection, and their performance is directly related to the safe operation of the system. Traditional mechanical tripping devices, due to drawbacks such as slow response, limited measurement accuracy, and insufficient intelligent management, are unable to meet the needs of modern power systems.

[0003] To solve the above problems, the patent with publication number CN213457698U proposes a multi-core electronic tripping system, including a base core part, a management core part and an extended core part; the base core part includes a base core MCU, the management core part includes a management core MCU, the extended core part includes multiple extended core modules, each extended core module includes an extended core MCU, the base core MCU is communicated with the management core MCU, and the management core MCU is communicated with each extended core MCU respectively; the base core MCU is used for the most basic sampling and protection functions, thereby better realizing high-precision measurement and high-reliability protection, the management MCU realizes human-computer interaction, and there is no need for the base core part to be directly connected to the external module, thereby improving safety and reliability. The extended part includes multiple extension modules, which is conducive to meeting the diversity of customer needs and facilitating the expansion of circuit breaker functions.

[0004] However, although the system has achieved significant improvements in functionality, its complex structure results in a relatively large circuit board size, high overall cost, and low reliability. Summary of the Invention

[0005] Based on this, it is necessary to provide an electronic tripping device with a simpler structure to address the problem of complex structure of the existing electronic tripping system.

[0006] The present application provides an electronic tripping device, comprising a current sampling module, a voltage sampling module, an electric energy metering module, a protection calculation module, a processor, an input / output control module, a tripping coil, a tripping power supply, and a system power supply; the current sampling module and the voltage sampling module are both connected to a first end of the electric energy metering module, a second end of the electric energy metering module is connected to a first end of the processor, the current sampling module and the voltage sampling module are both connected to a first end of the protection calculation module, a second end of the protection calculation module is connected to a first end of the processor, a second end of the processor is connected to a first end of the input / output control module, a second end of the input / output control module is connected to a first end of the tripping coil, a second end of the tripping coil is connected to a first end of the tripping power supply, and a second end of the tripping power supply and the system power supply are both connected to the current sampling module;

[0007] The current sampling module is used to collect the current signal of the circuit breaker and send the current signal to the power metering module and the protection calculation module;

[0008] The voltage sampling module is used to collect the voltage signal of the circuit breaker and send the voltage signal to the power metering module and the protection calculation module;

[0009] The electric energy metering module is used to calculate the current signal and the voltage signal to obtain the power measurement result and the electric energy measurement result;

[0010] The protection calculation module is used to calculate the current signal and voltage signal to obtain the protection calculation result;

[0011] The processor is used to perform sampling control on the electric energy metering module to obtain power measurement results and electric energy measurement results, and send the power measurement results and electric energy measurement results to the input and output control module; the processor is also used to perform sampling control on the protection calculation module to obtain protection calculation results, and send a trip coil activation instruction to the input and output control module when the protection calculation result indicates that a protection action is generated;

[0012] The input and output control module is used to activate the trip coil after receiving the trip coil activation instruction.

[0013] In one embodiment, the current sampling module includes a current transformer, a first signal conditioning circuit, and a first analog-to-digital conversion circuit. The first end of the current transformer is connected to the first end of the first signal conditioning circuit, the second end of the first signal conditioning circuit is connected to the first end of the first analog-to-digital conversion circuit, the electric energy metering module and the protection calculation module are both connected to the second end of the first analog-to-digital conversion circuit; the second end of the trip power supply and the system power supply are both connected to the second end of the current transformer;

[0014] The current transformer is used to collect the current signal of the circuit breaker and send the current signal to the first signal conditioning circuit;

[0015] The first signal conditioning circuit is used to preprocess the current signal and send the preprocessed current signal to the first analog-to-digital conversion circuit;

[0016] The first analog-to-digital conversion circuit is used to sample the preprocessed current signal to obtain current data of the circuit breaker, and send the current data to the electric energy metering module and the protection calculation module.

[0017] In one embodiment, the current sampling module further includes a gain amplifier circuit, the second end of the first signal conditioning circuit is connected to the first end of the gain amplifier circuit, and the second end of the gain amplifier circuit is connected to the first end of the first analog-to-digital conversion circuit;

[0018] The gain amplifier circuit is used to amplify the preprocessed current signal and transmit the amplified signal to the first analog-to-digital conversion circuit.

[0019] In one embodiment, the voltage sampling module includes a resistor divider circuit, a second signal conditioning circuit, and a second analog-to-digital conversion circuit, wherein a first end of the resistor divider circuit is connected to the N line, a second end of the resistor divider circuit is connected to a first end of the second signal conditioning circuit, a second end of the second signal conditioning circuit is connected to a first end of the second analog-to-digital conversion circuit, and the electric energy metering module and the protection calculation module are both connected to the second end of the second analog-to-digital conversion circuit;

[0020] The resistor voltage divider circuit is used to collect the voltage signal of the circuit breaker and send the voltage signal to the second signal conditioning circuit;

[0021] The second signal conditioning circuit is used to preprocess the voltage signal and send the preprocessed voltage signal to the second analog-to-digital conversion circuit;

[0022] The second analog-to-digital conversion circuit is used to sample the preprocessed voltage signal to obtain voltage data of the circuit breaker, and send the voltage data to the electric energy metering module and the protection calculation module.

[0023] In one embodiment, the electronic trip device further includes a switch position monitoring module, which is connected to the third terminal of the input and output control module;

[0024] The switch position monitoring module is used to send a contact position signal to the input and output control module, and the input and output control module sends the contact position signal to the processor; the processor is also used to determine the current circuit breaker state based on the contact position signal.

[0025] In one embodiment, it is characterized in that the switch position monitoring module includes a connector J1, a resistor R15, a resistor R16, a capacitor C5, a capacitor C10 and two travel switches, the first ends of the resistors R15 and R16 are connected to a 3.3V voltage signal, the second end of the resistor R15 is connected to the first end of the capacitor C5, the second end of the resistor R16 is connected to the first end of the capacitor C10, the second end of the capacitor C5 and the second end of the capacitor C10 are both grounded, pins 1 and 4 of the connector J1 are both grounded, pin 2 and the second end of the resistor R15 are both connected to the YX_FZ end of the processor, and pin 5 and the second end of the resistor R16 are both connected to the YX_TZ end of the processor; pins 1 and 2 of the connector J1 are connected to the first travel switch, and pins 4 and 5 are connected to the second travel switch.

[0026] In one embodiment, the input / output control module includes a tripping circuit, which includes capacitor C29, capacitor C30, capacitor C31, capacitor C32, capacitor C37, resistor R49, resistor R50, switch tube V1, diode D1, diode D2 and connector J2. The first ends of capacitors C29, capacitors C30, capacitors C31 and capacitor C32 are all connected to the first end of diode D2, and the second ends are all grounded; the first end of diode D1 is connected to the VCC_M voltage signal, and the second end is connected to the first end of diode D2. The second end of the diode D2 is connected to the first end of the switch tube, the second end of the switch tube is grounded, the first end of the resistor R49 is connected to the CPU_TK end of the processor, the second end of the resistor R49, the first end of the capacitor C37 and the first end of the resistor R50 are all connected to the control end of the switch tube, the second end of the capacitor C37 and the second end of the resistor R50 are all grounded; pin 1 of the connector J2 is connected to the first end of the diode D2, pin 2 is connected to the first end of the switch tube V1, pins 3 and 4 are both grounded, and pins 1 and 2 of the connector J2 are both connected to the trip coil.

[0027] In one embodiment, the electronic trip device further includes a voltage stabilizing module, the current sampling module is connected to a first end of the voltage stabilizing module, and the second end of the trip power supply and the system power supply are both connected to the second end of the voltage stabilizing module.

[0028] In one embodiment, the electronic trip device further includes a communication module and an RS485 bus module; a first end of the communication module is connected to a third end of the processor, a second end of the communication module is connected to a first end of the RS485 bus module, and a second end of the RS485 bus module is used to connect to an external module.

[0029] In one embodiment, the electronic tripping device further includes a display module, a key input module, a storage module, a clock module, a temperature detection module, an operation monitoring module, and a debugging module.

[0030] The above-mentioned electronic tripping device collects the current signal and voltage signal of the circuit breaker through the current sampling module and the voltage sampling module respectively. The electric energy metering module calculates the current signal and the voltage signal to obtain the power measurement result and the electric energy measurement result. The protection calculation module calculates the current signal and the voltage signal to obtain the protection calculation result. When the protection calculation result is to generate a protection action, the processor sends a trip coil activation instruction to the input and output control module. The input and output control module activates the trip coil after receiving the trip coil activation instruction. This not only realizes the metering and protection functions of the circuit breaker, but also the electronic tripping device has a relatively simple structure, reduces the volume of the circuit board, reduces the overall cost, and improves reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of an electronic tripping device in one embodiment;

[0032] Figure 2 A schematic structural diagram of an electronic tripping device in another embodiment;

[0033] Figure 3 Schematic diagram of the structure of an electronic tripping device in another embodiment;

[0034] Figure 4 A schematic structural diagram of an electronic tripping device in yet another embodiment;

[0035] Figure 5 is a schematic structural diagram of a first signal conditioning circuit in one embodiment;

[0036] Figure 6 A schematic diagram of the structure of a resistor voltage divider circuit and a second signal conditioning circuit in one embodiment;

[0037] Figure 7 Schematic diagram of the structure of a tripping circuit in one embodiment;

[0038] Figure 8 Schematic diagram of the structure of a key circuit in one embodiment;

[0039] Figure 9 FIG. 1 is a schematic structural diagram of a switch position monitoring module in an embodiment. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0041] In one embodiment, Figure 1 As shown, an electronic trip device is provided, including a current sampling module 100, a voltage sampling module 200, an energy metering module, a protection calculation module, a processor, an input / output control module, a trip coil, a trip power supply, and a system power supply. The current sampling module 100 and the voltage sampling module 200 are both connected to the first end of the energy metering module, the second end of the energy metering module is connected to the first end of the processor, the current sampling module 100 and the voltage sampling module 200 are both connected to the first end of the protection calculation module, the second end of the protection calculation module is connected to the first end of the processor, the second end of the processor is connected to the first end of the input / output control module, the second end of the input / output control module is connected to the first end of the trip coil, the second end of the trip coil is connected to the first end of the trip power supply, and the second end of the trip power supply and the system power supply are both connected to the current sampling module 100.

[0042] The current sampling module 100 is used to collect the current signal from the circuit breaker and transmit it to the energy metering module and the protection calculation module. The current signal from the circuit breaker can be a three-phase current signal of the circuit in which the circuit breaker is located. After the current sampling module 100 collects this three-phase current signal, it amplifies, filters, and performs analog-to-digital conversion to convert it into a digital signal. The digital signal is then transmitted to the energy metering module and the protection calculation module for further processing.

[0043] The voltage sampling module 200 collects the circuit breaker's voltage signal and transmits it to the energy metering module and the protection calculation module. The input of the voltage sampling module 200 is connected to the neutral line. The circuit breaker's voltage signal can be the three-phase voltage signal of the circuit in which the circuit breaker is located. The voltage sampling module 200 amplifies, filters, and performs analog-to-digital conversion on the three-phase voltage signal, converting it into a digital signal and outputting it to the energy metering module and the protection calculation module.

[0044] The electric energy metering module is used to calculate the current signal and the voltage signal to obtain the power measurement result and the electric energy measurement result. Specifically, the electric energy metering module can use the power calculation formula (such as instantaneous power P = UIcosθ, θ is the phase difference between voltage and current) and the electric energy integration algorithm (such as obtaining electric energy by integrating instantaneous power) to calculate the current power measurement result and the accumulated electric energy measurement result, and then send the power and electric energy data to the processor. Furthermore, after obtaining the current signal and voltage signal, the electric energy metering module can first synchronize these digital signals to ensure the temporal consistency of the current and voltage signals so as to perform accurate power and electric energy calculations.

[0045] The protection calculation module is used to calculate the current and voltage signals to obtain protection calculation results. Specifically, the protection calculation module can analyze and judge the received current and voltage signals according to the preset protection logic (such as overcurrent protection, short-circuit protection, overvoltage protection, undervoltage protection, etc.). If any abnormality is detected, such as the current exceeding the set threshold, the corresponding protection calculation result is generated and then sent to the processor for further processing. The protection calculation result may include the generated protection action and protection type.

[0046] The processor is used to sample and control the energy metering module to obtain power and energy measurement results, and send the power and energy measurement results to the input and output control module. The processor is also used to sample and control the protection calculation module to obtain protection calculation results, and send a trip coil activation instruction to the input and output control module when the protection calculation result indicates a protection action.

[0047] Specifically, the processor regularly samples data from the energy metering module and the protection calculation module, including power measurement results, energy measurement results, and protection calculation results. The acquired data can then be further processed, such as data verification and format conversion. Furthermore, the processor can send power and energy measurement results to the user, facilitating circuit breaker monitoring.

[0048] The input and output control module is used to activate the trip coil after receiving the trip coil activation instruction. After the trip coil is activated, the circuit breaker is disconnected.

[0049] The trip power supply is used to power the trip coil, and the system power supply is used to power the entire system, that is, the electronic trip device. Figure 1 (not shown) provides power for the trip power supply and the system power supply. At this time, the current sampling module 100 only samples but does not supply power. When the external auxiliary power supply cannot supply power due to an abnormal external power supply voltage, it automatically switches to the current sampling module 100 for power supply. At this time, the current sampling module 100 performs power supply and current sampling.

[0050] The electronic trip device of this embodiment collects the current signal and voltage signal of the circuit breaker through the current sampling module 100 and the voltage sampling module 200, respectively. The electric energy metering module calculates the current signal and the voltage signal to obtain power measurement results and electric energy measurement results. The protection calculation module calculates the current signal and the voltage signal to obtain a protection calculation result. When the protection calculation result indicates that a protection action is generated, the processor sends a trip coil activation instruction to the input / output control module. After receiving the trip coil activation instruction, the input / output control module activates the trip coil. This not only realizes the metering and protection functions of the circuit breaker, but also has a relatively simple structure of the electronic trip device, reduces the volume of the circuit board, and reduces the overall cost.

[0051] In one embodiment, Figure 2 As shown, the current sampling module 100 includes a current transformer 110, a first signal conditioning circuit 120 and a first analog-to-digital conversion circuit 130. The first end of the current transformer 110 is connected to the first end of the first signal conditioning circuit 120, the second end of the first signal conditioning circuit 120 is connected to the first end of the first analog-to-digital conversion circuit 130, the electric energy metering module and the protection calculation module are both connected to the second end of the first analog-to-digital conversion circuit 130; the second end of the trip power supply and the system power supply are both connected to the second end of the current transformer 110.

[0052] The current transformer 110 is used to collect the circuit breaker's current signal and transmit it to the first signal conditioning circuit 120. As the front-end sensor of the current sampling module 100, the current transformer 110 is responsible for collecting the circuit breaker's current signal. Using the principle of electromagnetic induction, it converts high currents into low currents for subsequent circuit processing. In this embodiment, the current transformer 110 can be an iron-core coil type, which offers high conversion accuracy and stability, accurately reflecting current changes in the circuit breaker.

[0053] The first signal conditioning circuit 120 is configured to pre-process the current signal and send the pre-processed current signal to the first analog-to-digital conversion circuit 130. The pre-processing process may include amplification, filtering, offset adjustment, etc. to ensure that the current signal is within an appropriate level range before analog-to-digital conversion and to reduce the effects of noise and interference.

[0054] The first analog-to-digital conversion circuit 130 samples the preprocessed current signal to obtain circuit breaker current data, which is then sent to the energy metering module and protection calculation module. The analog-to-digital conversion circuit (ADC) is the core component of the current sampling module 100, converting the preprocessed analog current signal into digital current data. This process is achieved through sampling and quantization. Parameters such as the sampling rate and resolution can be set by those skilled in the art based on the desired conversion accuracy and speed.

[0055] The current sampling module 100 in this embodiment includes a current transformer 110, a first signal conditioning circuit 120, and a first analog-to-digital conversion circuit 130, which realizes accurate measurement and digital conversion of the circuit breaker current, providing reliable data support for power energy metering, protection calculations, etc. of the power system.

[0056] In one embodiment, Figure 3 As shown, the current sampling module 100 further includes a gain amplifier circuit 140 , the second end of the first signal conditioning circuit 120 is connected to the first end of the gain amplifier circuit 140 , and the second end of the gain amplifier circuit 140 is connected to the first end of the first analog-to-digital conversion circuit 130 .

[0057] Among them, the gain amplifier circuit 140 is a programmable gain amplifier circuit. Through programmable control, the gain amplifier circuit 140 can automatically adjust its gain multiple according to the actual current magnitude, achieving precise setting and rapid switching of gain, thereby meeting the high requirements for current sampling accuracy and protection performance in different application scenarios. Specifically, when the current signal of the circuit breaker is within the normal operating range and is small, the gain amplifier circuit 140 automatically switches to high gain mode to finely amplify this weak signal, ensuring that the measurement accuracy under low current is not lost. When encountering high current, the gain amplifier circuit 140 adjusts to low gain state, so that the analog signal is as close as possible to but not exceeding the full-scale ADC sampling range, effectively preventing the signal from exceeding the range of the analog-to-digital converter and ensuring that the protection action under high current remains accurate.

[0058] The current sampling module 100 of this embodiment also includes a gain amplifier circuit 140. Through programming control, the gain amplifier circuit 140 can adjust its gain multiple according to the actual current magnitude, achieving precise setting and rapid switching of the gain, meeting the high requirements for current sampling accuracy and protection performance in different application scenarios, and giving the system greater flexibility and adaptability.

[0059] In one embodiment, the first analog-to-digital conversion circuit 130 is a Sigma-Delta ADC. This type of ADC is known for its high precision, low noise, and anti-interference capabilities, making it well-suited for accurately measuring current signals in power systems. Furthermore, the Sigma-Delta ADC can be a multi-channel 24-bit Sigma-Delta ADC to improve the accuracy of the analog-to-digital conversion, thereby enhancing the reliability of the electronic trip device.

[0060] In one embodiment, Figure 2 As shown, the voltage sampling module 200 includes a resistor divider circuit 210, a second signal conditioning circuit 220 and a second analog-to-digital conversion circuit 230. The first end of the resistor divider circuit 210 is connected to the N line (neutral line or zero line), the second end of the resistor divider circuit is connected to the first end of the second signal conditioning circuit 220, the second end of the second signal conditioning circuit 220 is connected to the first end of the second analog-to-digital conversion circuit 230, and the electric energy metering module and the protection calculation module are both connected to the second end of the second analog-to-digital conversion circuit 230.

[0061] The resistor divider circuit 210 is used to collect the voltage signal of the circuit breaker and send the voltage signal to the second signal conditioning circuit 220. Specifically, the resistor divider circuit 210 reduces the three-phase voltage on the circuit breaker to a low voltage range suitable for subsequent circuit processing by resistor divider.

[0062] The second signal conditioning circuit 220 is used to pre-process the voltage signal and send the pre-processed voltage signal to the second analog-to-digital conversion circuit 230. The pre-processing operation may include filtering, denoising, amplification, offset adjustment, etc. to ensure the quality and stability of the voltage signal.

[0063] The second analog-to-digital conversion circuit 230 samples the preprocessed voltage signal to obtain circuit breaker voltage data and sends this voltage data to the energy metering module and protection calculation module. The second analog-to-digital conversion circuit 230 converts the preprocessed analog voltage signal into a digital signal, i.e., voltage data, for subsequent energy metering and protection calculations.

[0064] The voltage sampling module 200 of this embodiment includes a resistor divider circuit 210, a second signal conditioning circuit 220, and a second analog-to-digital conversion circuit 230, which implements accurate voltage sampling and preprocessing, improves the transmission quality of the voltage signal, and thus improves the reliability of subsequent electric energy metering calculations and protection calculations.

[0065] In one embodiment, the second analog-to-digital conversion circuit 230 is a SAR (Successive Approximation Register) type analog-to-digital conversion circuit.

[0066] SAR-type analog-to-digital conversion circuits offer advantages such as fast conversion speed, high precision, low power consumption, and a simple structure. In a more detailed embodiment, the SAR-type analog-to-digital conversion circuit can be a 16-bit SAR-type analog-to-digital conversion circuit. This 16-bit SAR-type analog-to-digital conversion circuit can convert preprocessed voltage signals into 16-bit digital voltage data. This 16-bit resolution allows the SAR-type analog-to-digital conversion circuit to capture more signal details and achieve higher precision, further improving the performance and reliability of the electronic trip device.

[0067] This embodiment uses a SAR type analog-to-digital conversion circuit as the second analog-to-digital conversion circuit 230, which can improve the conversion accuracy of voltage data. The SAR type analog-to-digital conversion circuit has the characteristics of simple structure and low power consumption, further reducing the structural complexity of the electronic trip device and reducing costs.

[0068] In one embodiment, Figure 3 As shown, the electronic tripping device further includes a switch position monitoring module, which is connected to the third terminal of the input and output control module.

[0069] The switch position monitoring module transmits contact position signals to the input / output control module, which in turn transmits these signals to the processor. The processor also determines the current circuit breaker status based on the contact position signals. The switch position monitoring module is a standalone module comprised of two independent travel switches to ensure monitoring redundancy and accuracy. Furthermore, an additional sensor for detecting the free tripping state can be included as needed.

[0070] Specifically, when the contact position of the circuit breaker changes, the corresponding travel switch or sensor is activated and a contact position signal is generated. These signals include but are not limited to closing position signals, opening position signals and free tripping position signals. The switch position monitoring module transmits the contact position signal to the input and output control module, which performs preliminary processing on the received signal and forwards it to the processor. The processor receives and analyzes the contact position signal and determines the current state of the circuit breaker (closing, opening, free tripping) according to a preset logic algorithm. If a tripping operation needs to be performed, the processor sends a tripping instruction to the input and output control module, which then controls the action of the tripping coil. After the tripping action is completed, the processor can confirm whether the tripping is successful again through the contact position signal, that is, check whether the circuit breaker has been correctly switched to the opening or free tripping state.

[0071] This embodiment provides a switch position monitoring module to detect contact position signals, which can immediately provide feedback to the processor on the circuit breaker status and tripping action results, ensuring that the system can quickly respond to abnormal situations, protect circuit safety, and improve the operating reliability of the electronic trip device.

[0072] In one embodiment, Figure 3 As shown, the electronic trip device further includes a voltage stabilizing module 300 , the current sampling module 100 is connected to a first end of the voltage stabilizing module 300 , and a second end of the trip power supply and a system power supply are both connected to a second end of the voltage stabilizing module 300 .

[0073] Specifically, the voltage stabilization module 300 rectifies, filters, and stabilizes the current signal sent by the current sampling module 100 before providing power to the trip power supply and system power supply. Furthermore, since electronic trip devices are typically powered by an external auxiliary power supply, the voltage stabilization module can also be connected to the external auxiliary power supply. The voltage stabilization module stabilizes the voltage signal from the external auxiliary power supply before providing power to the trip power supply and system power supply.

[0074] Further, such as Figure 4As shown, the voltage stabilizing module 300 may further include a rectifier filter voltage stabilizing circuit 310 and a voltage stabilizing circuit 320, wherein the first end of the rectifier filter voltage stabilizing circuit 310 is connected to the current sampling module 100, and the second end is connected to the trip power supply and the system power supply; the first end of the voltage stabilizing circuit 320 is connected to the external auxiliary power supply, and the second end is connected to the trip power supply and the system power supply, thereby achieving electrical isolation, thereby further improving the stability of the power supply.

[0075] In this embodiment, the voltage stabilizing module 300 is provided to stabilize the current sampling module 100 and the external auxiliary power supply before supplying power to the trip power supply and the system power supply, thereby improving the power supply stability and further improving the working reliability of the electronic trip device.

[0076] In one embodiment, Figure 3 As shown, the electronic trip device also includes a communication module and an RS485 bus module; the first end of the communication module is connected to the third end of the processor, the second end of the communication module is connected to the first end of the RS485 bus module, and the second end of the RS485 bus module is used to connect to the external module.

[0077] The external module can be a host computer, a remote monitoring center, or other device with RS485 communication capabilities. It receives data from the processor and issues control commands to the processor. Specifically, the processor can send collected data such as power consumption data, fault information, and switch status to the communication module. Upon receiving the data, the communication module can further perform necessary format conversion or verification to ensure data accuracy before sending it to the external module via the RS485 bus module. After receiving the data via the RS485 interface, the external module extracts key information such as power consumption data, fault information, and switch status for display, storage, or further processing. Furthermore, the external module can issue control commands to the electronic trip device based on actual needs, such as remote opening and closing, parameter setting, etc. These control commands are sent to the communication module via the RS485 bus module, which then forwards them to the processor for execution. After receiving the control commands, the processor performs logical analysis and executes them, such as controlling the opening or closing of a circuit breaker. The execution results are also fed back to the external module via the communication module and RS485 bus module.

[0078] Furthermore, during data transmission, mechanisms such as CRC can be used to ensure the integrity and correctness of data during transmission. The communication module and processor can also have built-in error handling mechanisms that can identify and handle communication failures, data errors, etc., to improve system stability and reliability.

[0079] The electronic trip device in this embodiment achieves efficient data transmission and control with the external module by providing a communication module and an RS485 bus module, thereby realizing remote monitoring, control, and management of the circuit breaker. This greatly improves the convenience and efficiency of equipment management. In addition, the use of the RS485 bus module for communication can further improve the stability and reliability of data transmission.

[0080] In order to further improve the intelligence, maintainability and user interaction capability of the electronic trip device, in one embodiment, Figure 3 As shown, the electronic trip device also includes a display module 400, a key input module, a storage module, a clock module, a temperature detection module, an operation monitoring module, and a debugging module. The display module 400 and the key input module are both connected to the input / output control module. The storage module, clock module, temperature detection module, operation monitoring module, and debugging module can all be connected to the processor.

[0081] Display module 400 can be used to display important information such as the current operating status, real-time current and voltage values, fault type (such as overload, short circuit, undervoltage, etc.), remaining protection time, device temperature, etc. Through an intuitive graphical and textual interface, users can quickly understand the status of the equipment, facilitating daily inspections and maintenance.

[0082] The key input module specifically includes four function keys: "Up" and "Down" for parameter adjustment, "Left (Back / Fault Reset)" for undoing an operation or clearing a fault state, and "Right (Confirm)" for confirming a setting or selection. Combined with guidance from the display module 400, users can easily query and adjust various circuit breaker parameters, such as current setpoints and time delays, and quickly understand and respond to the device's operating status.

[0083] The storage module contains a large-capacity non-volatile memory that records historical equipment operation data, fault events, maintenance records, and other information. This data can be exported through the debugging module, allowing technicians to analyze equipment performance, predict potential failures, and optimize system settings, thereby improving system reliability and maintenance efficiency.

[0084] The clock module utilizes high-precision real-time clock technology and features a built-in high-precision real-time clock, accurately recording key time points such as fault occurrence and maintenance operation times. Combined with data stored in the storage module, this generates detailed device operation logs, helping users trace the root causes of problems and implement effective device management strategies.

[0085] The temperature detection module monitors the temperature inside the device and its surroundings in real time. When the temperature exceeds a preset threshold, it automatically triggers an alarm or takes protective measures (such as tripping), ensuring that the device operates within a safe temperature range and extending its service life.

[0086] The operation monitoring module is responsible for comprehensively monitoring the operating status of the electronic trip device, including real-time monitoring of electrical parameters such as current, voltage, and power factor, as well as evaluating the status of mechanical components such as contacts and springs. If an anomaly is detected, the corresponding protection mechanism is immediately triggered to prevent equipment damage or safety accidents.

[0087] The debugging module offers a variety of communication interface options (such as RS232 / RS485, USB, and Ethernet), supporting remote configuration, debugging, and monitoring. With professional software tools, technicians can easily perform operations such as parameter setting, fault diagnosis, and software upgrades, greatly improving work efficiency and facilitating system maintenance. Furthermore, the module supports seamless integration with a host computer or automation system, laying a solid foundation for achieving higher levels of automated control and remote management.

[0088] The electronic trip device in this embodiment integrates modules such as display, input, storage, clock, temperature detection, operation monitoring, and debugging interfaces, significantly enhancing its intelligence, ease of operation, and maintainability. Users can intuitively understand device status and quickly respond to faults, while technicians can efficiently perform remote configuration, debugging, and data analysis to optimize system settings. These features enhance the device's safety, extend its service life, and promote stable operation and efficient management of the power system.

[0089] In order to better understand the electronic tripping device in the above embodiment, a more detailed embodiment is provided below for illustration.

[0090] In one embodiment, Figure 4As shown, an electronic tripping device is provided, including a resistor voltage divider circuit 210, a second signal conditioning circuit 220, a 16-bit SAR type AD (corresponding to the second analog-to-digital conversion circuit 230 in the above embodiment), an electric energy metering module, a protection calculation module, a current transformer 110 (iron core coil) (corresponding to the current sampling circuit in the above embodiment), a first signal conditioning circuit 120, a PGA (Programmable Gain Amplifier) ​​(corresponding to the gain amplifier circuit 140 in the above embodiment), a 24-bit ∑-Δ type AD (corresponding to the first analog-to-digital conversion circuit 130 in the above embodiment), a processor, an input / output control module, a tripping coil, a liquid crystal display 410, an indicator light 420, a key input, a tripping power supply, a system power supply, a switch position monitoring module, a rectifier filter voltage stabilizing circuit 310, a voltage stabilizing circuit 320, an external interface (for connecting an external module), a communication module, an RS485 bus module, a storage module, an RTC (corresponding to the clock module in the above embodiment), a temperature detection module, an operation monitoring module, and a debugging interface (corresponding to the debugging module in the above embodiment). The SAR AD, ∑-Δ AD, energy metering module, protection calculation module, processor, input / output control module, communication module, storage module, RTC, temperature detection module, operation monitoring module, and debugging interface can be integrated into the controller. The RS485 bus module can utilize the THVD1500 RS485 bus transceiver, the storage module can utilize the FT24C512 memory, the operation monitoring module can utilize the MAX706RES monitoring chip, and the processor can utilize the MKM34Z256 MCU chip. The operating principle and functions of the electronic trip device of this embodiment are described below from the following aspects:

[0091] Current and Voltage Acquisition: The device incorporates a built-in current transformer 110 (iron core coil) and a voltage acquisition component (resistor divider circuit 210), responsible for accurately collecting the circuit breaker's current and voltage signals, respectively. Current transformer 110 not only assists in determining current protection logic for overload and short-circuit conditions but also automatically switches to power supply mode when an external power supply anomaly occurs, ensuring continuous operation of the protection function. Figure 5The specific structure of the first signal conditioning circuit 120 for current sampling is shown. The first signal conditioning circuit 120 specifically includes a phase A current signal conditioning circuit, a phase B current signal conditioning circuit and a phase C current signal conditioning circuit, wherein the phase A current signal conditioning circuit includes a resistor R44, a resistor R45, a capacitor C27 and a capacitor C28, the first end of the resistor R44 is connected to the AD_IAP end of the current transformer, the second end of the resistor R44 and the first end of the capacitor C27 are both connected to the ADC_ICP end of the processor, the second end of the capacitor C27 and the first end of the capacitor C28 are both grounded, the second end of the capacitor C28 and the second end of the resistor R45 are both connected to the ADC_ICN end of the processor, and the first end of the resistor R45 is connected to the AD_IAN end of the current transformer. The B-phase current signal conditioning circuit includes a resistor R46, a resistor R47, a capacitor C33 and a capacitor C34. The first end of the resistor R46 is connected to the AD_IBP terminal of the current transformer, the second end of the resistor R46 and the first end of the capacitor C33 are both connected to the ADC_IBP terminal of the processor, the second end of the capacitor C33 and the first end of the capacitor C34 are both grounded, the second end of the capacitor C34 and the second end of the resistor R47 are both connected to the ADC_IBN terminal of the processor, and the first end of the resistor R47 is connected to the AD_IBN terminal of the current transformer. The C-phase current signal conditioning circuit includes a resistor R48, a resistor R51, a capacitor C35, and a capacitor C38. The first end of the resistor R48 is connected to the AD_IAP terminal of the current transformer, the second end of the resistor R48 and the first end of the capacitor C35 are both connected to the ADC_IAP terminal of the processor, the second end of the capacitor C35 and the first end of the capacitor C38 are both grounded, the second end of the capacitor C38 and the second end of the resistor R51 are both connected to the ADC_IAN terminal of the processor, and the first end of the resistor R51 is connected to the AD_IAN terminal of the current transformer.

[0092] Voltage acquisition is carried out through resistor division and, after signal conditioning, is connected to a high-precision SAR ADC to provide data support for voltage protection and energy metering. Figure 6The specific structure of the resistor divider circuit 210 and the second signal conditioning circuit 220 is shown. The resistor divider circuit 210 includes a phase A voltage acquisition circuit, a phase B voltage acquisition circuit, and a phase C voltage acquisition circuit. The phase A voltage acquisition circuit includes resistors R1, R2, R3, R4, R5, and R6 connected in series. The first end of resistor R1 obtains the phase A voltage signal UA. The second end of resistor R6 is connected to the first end of the voltage regulator diode Z1, and the second end of the voltage regulator diode Z1 is grounded. AD_UA is the phase A voltage sampling signal. The phase B voltage acquisition circuit includes resistors R9, R10, R11, R12, R13, and R14 connected in series. The first end of resistor R9 obtains the phase B voltage signal UB. The second end of resistor R14 is connected to the first end of the voltage regulator diode Z2, and the second end of the voltage regulator diode Z2 is grounded. AD_UB is the phase B voltage sampling signal. The C-phase voltage acquisition circuit includes resistors R20, R21, R22, R23, R24, and R25 connected in series. The first end of resistor R20 obtains the C-phase voltage signal UC. The second end of resistor R25 is connected to the first end of the voltage regulator diode Z3. The second end of the voltage regulator diode Z3 is grounded. AD_UC is the C-phase voltage sampling signal.

[0093] The second signal conditioning circuit 220 includes a filtering circuit and an amplifier circuit. The filtering circuit includes resistor R7, capacitor C1, resistor R17, capacitor C3, resistor R27, capacitor C12, capacitor C6, capacitor C7, capacitor C8, and capacitor C4. The first ends of resistor R7 and capacitor C1 are connected to the output end of the A-phase voltage acquisition circuit, i.e., the second end of resistor R6. The first ends of resistor R17 and capacitor C3 are connected to the output end of the B-phase voltage acquisition circuit, i.e., the second end of resistor R14. The first ends of resistor R27 and capacitor C12 are connected to the output end of the C-phase voltage acquisition circuit, i.e., the second end of resistor R25. The second ends of capacitor C1, resistor R7, resistor R17, capacitor C3, resistor R27, and capacitor C12 are connected to the first end of capacitor C6, the first end of capacitor C7, the first end of capacitor C8, and the first end of capacitor C4. The second ends of capacitor C6, capacitor C7, capacitor C8, and capacitor C4 are all grounded. The first end of capacitor C4 is connected to the VREF / 2 voltage signal. The amplifier circuit includes resistor R19, resistor R8, capacitor C2, amplifier U1, capacitor C9, resistor R26, resistor R18, and capacitor C11. The first end of resistor R19 is connected to the first end of capacitor C4, and the second end is connected to the output of amplifier U1. The first end of capacitor C2 and the first end of resistor R8 are both connected to the inverting input of amplifier U1. The second end of capacitor C2 and the second end of resistor R8 are both connected to the output of amplifier U1. The first end of capacitor C9, the first end of resistor R26, and the second end of resistor R18 are all connected to the non-inverting input of amplifier U1. The second end of capacitor C9, the second end of resistor R26, and the second end of capacitor C11 are all grounded. The first end of resistor R18 and the first end of capacitor C11 are both connected to the VREF voltage signal. The specific model of amplifier U1 can be LMV771.

[0094] Signal Processing and Amplification: To meet the needs of high-precision measurement in different current ranges, the device incorporates a programmable gain amplifier (PGA). The PGA dynamically adjusts the gain based on the current, ensuring that the analog signal is close to, but not exceeding, the AD full-scale range. This ensures both measurement accuracy at low currents and protection accuracy at high currents.

[0095] Core control and calculation: The input and output control module includes a trip circuit, which is used to activate the trip coil after receiving a trip coil activation command. Figure 7This is a schematic diagram of the structure of the trip circuit, including capacitor C29, capacitor C30, capacitor C31, capacitor C32, capacitor C37, resistor R49, resistor R50, switch tube V1, diode D1, diode D2 and connector J2. The first ends of capacitors C29, capacitor C30, capacitor C31 and capacitor C32 are all connected to the first end of diode D2, and the second ends are all grounded; the first end of diode D1 is connected to the VCC_M voltage signal, the second end is connected to the first end of diode D2, the second end of diode D2 is connected to the first end of the switch tube, and the second end of the switch tube is grounded; the first end of resistor R49 is connected to the CPU_TK terminal of the processor to obtain a trip coil activation instruction, the second end of resistor R49, the first end of capacitor C37 and the first end of resistor R50 are all connected to the control end of the switch tube, the second end of capacitor C37 and the second end of resistor R50 are all grounded; pin 1 of connector J2 is connected to the first end of diode D2, pin 2 is connected to the first end of switch tube V1, pins 3 and 4 are both grounded, and pins 1 and 2 of connector J2 are both connected to the trip coil. The controller uses Freescale's KM34 metering-capable SOC as its core. It integrates a multi-channel A / D converter (including a 24-bit Σ-Δ A / D converter and a 16-bit SAR A / D converter), enabling both metering and protection sampling. The controller not only performs analog-to-digital conversion, energy metering, and protection calculations, but also monitors peripherals such as the LCD display 410, indicator lights 420, key inputs, trip coils, and communication modules, ensuring coordinated operation of the entire system.

[0096] Human-computer interaction and communication: The device is equipped with an intuitive LCD display and a four-way keypad. The four-way keypad includes "up," "down," "left (return / fault reset)," and "right (confirm)." Combined with the information displayed on the LCD 410, the breaker's setting parameters and operating status can be queried and set. Users can easily view circuit breaker operating parameters (such as current, voltage, power, and energy), fault information, and perform parameter settings and information queries. Figure 8This is a structural diagram of the key circuit, including key K1 (key "up"), capacitor C15, resistor R36, K2 (key "down"), capacitor C17, resistor R38, K3 (key "left"), capacitor C22, resistor R39, K4 (key "right"), capacitor C23 and resistor R41. The first end of capacitor C15 and the first end of resistor R36 are both connected to the first end of button K1, the first end of capacitor C17 and the first end of resistor R38 are both connected to the first end of button K2, the first end of capacitor C22 and the first end of resistor R39 are both connected to the first end of button K3, the first end of capacitor C23 and the first end of resistor R41 are both connected to the first end of button K4, the second end of resistor R36, the second end of resistor R38, the second end of resistor R39, and the second end of resistor R41 are all connected to V3P3 (3.3V voltage signal), and the second end of capacitor C15, the second end of capacitor C17, the second end of capacitor C22, the second end of capacitor C23, the first end of button K1, the first end of button K2, the first end of button K3, and the first end of button K4 are all grounded. In addition, through the RS485 bus communication module, the device supports remote communication with external modules, realizing functions such as remote control, parameter setting, information reporting, shunt action, auxiliary alarm, etc., greatly improving the maintainability and intelligence level of the system. At the same time, there are four indicator lights 420, namely the operation indicator light (displaying the current operating status of the circuit breaker), the heavy load pre-alarm indicator light (providing early warning when approaching the overload threshold), the overload alarm indicator light (lights up when overload occurs) and the communication indicator light (indicating the communication status). These indicators provide users with intuitive equipment status feedback.

[0097] Safety Monitoring and Status Feedback: The independent switch position monitoring module consists of two travel switches that monitor the closed, open, and free-trip positions of the circuit breaker contacts in real time. Specifically, the first travel switch can be installed at a specific location along the circuit breaker contact closing path. When the circuit breaker contacts are fully closed to the closed position, the contacts or a connected mechanism triggers the travel switch. The second travel switch can be installed at an appropriate location along the circuit breaker contact opening or free-tripping paths. This not only monitors the open position of the circuit breaker contacts but also provides a timely signal if the circuit breaker free-trips. Figure 9This is a schematic diagram of the structure of the switch position monitoring module, including connector J1, resistor R15, resistor R16, capacitor C5, capacitor C10 and two travel switches (not shown in the figure). The first ends of resistors R15 and R16 are connected to V3P3 (3.3V voltage signal), the second end of resistor R15 is connected to the first end of capacitor C5, the second end of resistor R16 is connected to the first end of capacitor C10, the second end of capacitor C5 and the second end of capacitor C10 are both grounded, pins 1 and 4 of connector J1 are both grounded, pin 2 and the second end of resistor R15 are both connected to the YX_FZ end of the processor, and pin 5 and the second end of resistor R16 are both connected to the YX_TZ end of the processor. Pins 1 and 2 of connector J1 are connected to the first travel switch (not shown in the figure), and pins 4 and 5 are connected to the second travel switch (not shown in the figure). This design not only provides the electronic trip unit with accurate circuit breaker status information, but also verifies the success of the tripping operation after it occurs. This status information is then transmitted to an external display unit via communication, which then provides a number of auxiliary and alarm output signals for rapid fault diagnosis and resolution. In summary, the electronic trip device in this embodiment requires only one set of transformers to implement metering and protection, reducing the size of the circuit breaker.

[0098] The electronic trip device in this embodiment only requires one controller, namely a SOC chip, to achieve metering protection, without the need for an external additional metering and management chip, which simplifies the overall circuit, reduces the size of the circuit board, improves working reliability and reduces overall cost.

[0099] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An electronic tripping device, characterized in that: It includes a current sampling module, a voltage sampling module, an electric energy metering module, a protection calculation module, a processor, an input / output control module, a trip coil, a trip power supply and a system power supply; the current sampling module and the voltage sampling module are both connected to the first end of the electric energy metering module, the second end of the electric energy metering module is connected to the first end of the processor, the current sampling module and the voltage sampling module are both connected to the first end of the protection calculation module, the second end of the protection calculation module is connected to the first end of the processor, the second end of the processor is connected to the first end of the input / output control module, the second end of the input / output control module is connected to the first end of the trip coil, the second end of the trip coil is connected to the first end of the trip power supply, and the second end of the trip power supply and the system power supply are both connected to the current sampling module; The current sampling module is used to collect the current signal of the circuit breaker and send the current signal to the electric energy metering module and the protection calculation module; The voltage sampling module is used to collect the voltage signal of the circuit breaker and send the voltage signal to the electric energy metering module and the protection calculation module; The electric energy metering module is used to calculate the current signal and the voltage signal to obtain a power measurement result and an electric energy measurement result; The protection calculation module is used to calculate the current signal and the voltage signal to obtain a protection calculation result; The processor is used to perform sampling control on the electric energy metering module to obtain the power measurement result and the electric energy measurement result, and send the power measurement result and the electric energy measurement result to the input and output control module; The processor is further configured to perform sampling control on the protection calculation module to obtain the protection calculation result, and send a trip coil activation instruction to the input / output control module when the protection calculation result indicates that a protection action is generated; The input / output control module is configured to activate the trip coil after receiving the trip coil activation instruction.

2. The electronic tripping device according to claim 1, characterized in that: The current sampling module includes a current transformer, a first signal conditioning circuit, and a first analog-to-digital conversion circuit. The first end of the current transformer is connected to the first end of the first signal conditioning circuit, the second end of the first signal conditioning circuit is connected to the first end of the first analog-to-digital conversion circuit, the electric energy metering module and the protection calculation module are both connected to the second end of the first analog-to-digital conversion circuit; the second end of the trip power supply and the system power supply are both connected to the second end of the current transformer; The current transformer is used to collect the current signal of the circuit breaker and send the current signal to the first signal conditioning circuit; The first signal conditioning circuit is used to preprocess the current signal and send the preprocessed current signal to the first analog-to-digital conversion circuit; The first analog-to-digital conversion circuit is used to sample the preprocessed current signal to obtain current data of the circuit breaker, and send the current data to the electric energy metering module and the protection calculation module.

3. The electronic tripping device according to claim 2, characterized in that: The current sampling module further includes a gain amplifier circuit, the second end of the first signal conditioning circuit is connected to the first end of the gain amplifier circuit, and the second end of the gain amplifier circuit is connected to the first end of the first analog-to-digital conversion circuit; The gain amplifier circuit is used to amplify the preprocessed current signal and transmit it to the first analog-to-digital conversion circuit.

4. The electronic tripping device according to claim 1, characterized in that: The voltage sampling module includes a resistor divider circuit, a second signal conditioning circuit and a second analog-to-digital conversion circuit, wherein a first end of the resistor divider circuit is connected to the N line, a second end of the resistor divider circuit is connected to a first end of the second signal conditioning circuit, a second end of the second signal conditioning circuit is connected to a first end of the second analog-to-digital conversion circuit, and the electric energy metering module and the protection calculation module are both connected to the second end of the second analog-to-digital conversion circuit; The resistor voltage divider circuit is used to collect the voltage signal of the circuit breaker and send the voltage signal to the second signal conditioning circuit; The second signal conditioning circuit is used to preprocess the voltage signal and send the preprocessed voltage signal to the second analog-to-digital conversion circuit; The second analog-to-digital conversion circuit is used to sample the preprocessed voltage signal to obtain voltage data of the circuit breaker, and send the voltage data to the electric energy metering module and the protection calculation module.

5. The electronic tripping device according to claim 1, characterized in that: The device further includes a switch position monitoring module connected to the third terminal of the input and output control module; The switch position monitoring module is used to send a contact position signal to the input / output control module, and the input / output control module sends the contact position signal to the processor; the processor is also used to determine the current circuit breaker state according to the contact position signal.

6. The electronic tripping device according to claim 5, characterized in that: The switch position monitoring module includes a connector J1, a resistor R15, a resistor R16, a capacitor C5, a capacitor C10 and two travel switches. The first ends of the resistors R15 and R16 are connected to a 3.3V voltage signal, the second end of the resistor R15 is connected to the first end of the capacitor C5, the second end of the resistor R16 is connected to the first end of the capacitor C10, the second end of the capacitor C5 and the second end of the capacitor C10 are both grounded, pins 1 and 4 of the connector J1 are both grounded, pin 2 and the second end of the resistor R15 are both connected to the YX_FZ end of the processor, and pin 5 and the second end of the resistor R16 are both connected to the YX_TZ end of the processor; pins 1 and 2 of the connector J1 are connected to the first travel switch, and pins 4 and 5 are connected to the second travel switch.

7. The electronic tripping device according to claim 1, characterized in that: The input-output control module includes a tripping circuit, which includes a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C37, a resistor R49, a resistor R50, a switch tube V1, a diode D1, a diode D2 and a connector J2. The first ends of the capacitors C29, C30, C31 and C32 are all connected to the first end of the diode D2, and the second ends are all grounded; the first end of the diode D1 is connected to the VCC_M voltage signal, and the second end is connected to the first end of the diode D2. The second end of the pin 2 is connected to the first end of the switch tube, the second end of the switch tube is grounded, the first end of the resistor R49 is connected to the CPU_TK end of the processor, the second end of the resistor R49, the first end of the capacitor C37 and the first end of the resistor R50 are all connected to the control end of the switch tube, the second end of the capacitor C37 and the second end of the resistor R50 are all grounded; pin 1 of the connector J2 is connected to the first end of the diode D2, pin 2 is connected to the first end of the switch tube V1, pins 3 and 4 are both grounded, and pins 1 and 2 of the connector J2 are both connected to the trip coil.

8. The electronic tripping device according to claim 1, characterized in that: The device further includes a voltage stabilizing module, the current sampling module is connected to a first end of the voltage stabilizing module, and the second end of the trip power supply and the system power supply are both connected to the second end of the voltage stabilizing module.

9. The electronic tripping device according to claim 1, characterized in that: The device also includes a communication module and an RS485 bus module; the first end of the communication module is connected to the third end of the processor, the second end of the communication module is connected to the first end of the RS485 bus module, and the second end of the RS485 bus module is used to connect to an external module.

10. The electronic tripping device according to claim 1, characterized in that: The device also includes a display module, a key input module, a storage module, a clock module, a temperature detection module, an operation monitoring module and a debugging module.

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