Circuit breaker controller with fault recording function

Abstract

The utility model discloses a circuit breaker controller with a fault recording function. The circuit breaker controller comprises a current acquisition unit, a voltage acquisition unit, a three-phase current conditioning circuit, a three-phase voltage conditioning circuit, a three-phase electric energy metering unit, a main control chip, a communication unit, a protection output module, a human-computer interface and an external storage module, the current acquisition unit is connected to the three-phase current conditioning circuit, the voltage acquisition unit is connected to the three-phase voltage conditioning circuit, and the three-phase current conditioning circuit and the three-phase voltage conditioning circuit are connected to the three-phase electric energy metering unit. The three-phase current conditioning circuit, the three-phase voltage conditioning circuit, the three-phase electric energy metering unit, the communication unit, the protection output module, the human-computer interface and the external storage module are all connected to the main control chip, and the monitoring equipment is connected to the main control chip through the communication unit. The circuit breaker controller with the fault wave recording function has the fault wave recording function, so that a user can conveniently analyze and check fault reasons.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the research experiment automation technical field, concretely relates to a circuit breaker controller with fault recording function. BACKGROUND

[0002] The controller of circuit breaker is mainly functioned to monitor three-phase voltage, three-phase current, frequency, power and the like parameters, make accurate judgment and fast break the circuit breaker to the voltage abnormality (such as voltage loss, overvoltage, undervoltage, phase shortage) and current (long time delay protection, short time delay protection, instantaneous protection) that appear. With monitoring test software, all parameters of the controller can be displayed, set and changed in monitoring center. However, after the accident tripping appears, the fault reason is unknown, and the specific reason of break is unable to judge. CONTENT OF UTILITY MODEL

[0003] The utility model provides a circuit breaker controller with fault recording function solves above-mentioned technical problem, and specifically adopts the following technical scheme:

[0004] A circuit breaker controller with fault recording function includes: current acquisition unit, voltage acquisition unit, three-phase current conditioning circuit, three-phase voltage conditioning circuit, three-phase electric energy metering unit, main control chip, communication unit, protection output module, man-machine interface and external storage module.

[0005] The current acquisition unit is connected to the three-phase current conditioning circuit, the voltage acquisition unit is connected to the three-phase voltage conditioning circuit, the three-phase current conditioning circuit and the three-phase voltage conditioning circuit are connected to the three-phase electric energy metering unit, the three-phase current conditioning circuit, the three-phase voltage conditioning circuit, the three-phase electric energy metering unit, the communication unit, the protection output module, the man-machine interface and the external storage module are all connected to the main control chip, and the monitoring equipment is connected to the main control chip through the communication unit.

[0006] Further, the external storage module is EEPROM.

[0007] Further, the main control chip is integrated with internal analog-digital conversion module, and the three-phase current conditioning circuit and the three-phase voltage conditioning circuit are connected to the internal analog-digital conversion module of the main control chip.

[0008] Further, the circuit breaker controller with fault recording function further includes clock module, and the clock module is connected to the main control chip.

[0009] Further, the main control chip directly reads the data in the three-phase electric energy metering unit through USART communication.

[0010] Further, the communication unit is CAN module.

[0011] Further, the human-machine interface comprises a display module and a button module, and the display module and the button module are connected to the master control chip.

[0012] Further, the current acquisition unit is a current transformer.

[0013] Further, the voltage acquisition unit is a capacitor voltage division circuit.

[0014] The circuit breaker controller with the fault recording function has the fault recording function, and is convenient for a user to analyze and troubleshoot a fault cause.

[0015] The circuit breaker controller with the fault recording function has the fault recording function, and is convenient for a user to analyze and troubleshoot a fault cause. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description.

[0017] Figure 1 is a schematic view of the circuit breaker controller with the fault recording function. DETAILED DESCRIPTION

[0018] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0019] As Figure 1The circuit breaker controller with fault recording function provided by the application comprises a current acquisition unit, a voltage acquisition unit, a three-phase current conditioning circuit, a three-phase voltage conditioning circuit, a three-phase electric energy metering unit, a main control chip, a communication unit, a protection output module, a man-machine interface and an external storage module.

[0020] Specifically, the current acquisition unit and the voltage acquisition unit are respectively used for acquiring current information and voltage information. Optionally, the current acquisition unit can be a current transformer, and the voltage acquisition unit can be a capacitor voltage dividing circuit. The application does not make any limitation on this.

[0021] The current acquisition unit is connected to the three-phase current conditioning circuit, and the voltage acquisition unit is connected to the three-phase voltage conditioning circuit. The three-phase current conditioning circuit and the three-phase voltage conditioning circuit are connected to the main control chip. In the application, the main control chip is integrated with an internal analog-digital conversion module, and the three-phase current conditioning circuit and the three-phase voltage conditioning circuit are connected to the internal analog-digital conversion module of the main control chip. The voltage acquisition unit and the current acquisition unit are directly connected to the analog-digital conversion module inside the main control chip via a signal conditioning circuit composed of an operational amplifier as a core device, serving as a special channel for recording data acquisition.

[0022] The three-phase current conditioning circuit and the three-phase voltage conditioning circuit are connected to the three-phase electric energy metering unit, and the three-phase electric energy metering unit is connected to the main control chip. Specifically, the electric energy metering unit is used for acquiring voltage, current, power, power factor, frequency and other information, and the main control chip can directly read the data information in the electric energy metering unit, including current, voltage, power, power factor and the like, to ensure the accuracy requirements of various parameters and the stability of data. The USART supports both synchronous and asynchronous communication modes, and can select a suitable communication mode according to specific needs, providing higher flexibility and adaptability. The USART also has a high data transmission rate. At the same time, the USART supports full-duplex communication, which can send and receive data at the same time, improving the communication efficiency.

[0023] The communication unit, the protection output module, the man-machine interface and the external storage module are connected to the main control chip, and the monitoring equipment is connected to the main control chip through the communication unit.

[0024] Specifically, when the actual load exceeds the set protection value (overload long delay, short circuit short delay, instantaneous protection), the master control chip sends a trip instruction to the protection output module, so that the frame circuit breaker is reliably disconnected. At the same time, the voltage signal and the current signal are collected in real time by the analog-to-digital conversion inside the master control chip through the conditioning circuit, and saved to the data area of the master control chip (the number of waveforms before and after the fault can be set according to actual needs). After the data collection is completed, the data is saved to the external storage module, that is, the fault recording. The fault recording can record the waveforms and data before, during and after the fault, which is the basis for analyzing and studying the fault law. Then, the master control chip sends an event code to the monitoring device, and after confirmation, the monitoring device issues a read fault recording data, uploads the recording data through the communication unit and displays the voltage and current waveforms on the monitoring device. The circuit breaker controller with fault recording function of the application can store 10 groups of recording data, and can read any recording data in the 10 groups of data.

[0025] In the embodiments of the application, the external storage module is an EEPROM. The data in the EEPROM remains unchanged after power failure, ensuring the reliability and durability of the data. And the EEPROM can withstand multiple erase and write cycles, usually more than tens of thousands of times, with a long service life. In standby state, the power consumption of the EEPROM is very low.

[0026] Specifically, the communication unit is a CAN module. CAN communication has real-time and high-speed, which can adapt to fast response application scenarios. CAN communication also has high reliability, ensuring the reliability and stability of communication.

[0027] The human-computer interface includes a display module and a key module, and the display module and the key module are connected to the master control chip. The display module can be a digital tube display. The digital tube is mainly responsible for displaying voltage, current, power, protection tripping current and protection tripping time in turn. The key module is mainly used for users to set the circuit breaker parameters and fault query.

[0028] In the embodiments of the application, the circuit breaker controller with fault recording function also includes a clock module connected to the master control chip. The clock module is mainly responsible for the timing function, including overload long delay protection, short circuit short delay protection, instantaneous protection and other delay timing functions.

[0029] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the above examples do not limit the present application in any form, and any technical solution obtained by equivalent substitution or equivalent transformation falls within the protection scope of the present application.

Claims

1. A circuit breaker controller with fault recording function, characterized in that, Includes: current acquisition unit, voltage acquisition unit, three-phase current conditioning circuit, three-phase voltage conditioning circuit, three-phase energy metering unit, main control chip, communication unit, protection output module, human-machine interface and external storage module; The current acquisition unit is connected to the three-phase current conditioning circuit, the voltage acquisition unit is connected to the three-phase voltage conditioning circuit, the three-phase current conditioning circuit and the three-phase voltage conditioning circuit are connected to the three-phase energy metering unit, the three-phase current conditioning circuit, the three-phase voltage conditioning circuit, the three-phase energy metering unit, the communication unit, the protection output module, the human-machine interface and the external storage module are all connected to the main control chip, and the monitoring device is connected to the main control chip through the communication unit.

2. The circuit breaker controller with fault recording function according to claim 1, characterized in that, The external storage module is an EEPROM.

3. The circuit breaker controller with fault recording function according to claim 1, characterized in that, The main control chip integrates an internal analog-to-digital converter module, and the three-phase current conditioning circuit and the three-phase voltage conditioning circuit are connected to the internal analog-to-digital converter module of the main control chip.

4. The circuit breaker controller with fault recording function according to claim 1, characterized in that, The circuit breaker controller with fault recording function also includes a clock module, which is connected to the main control chip.

5. The circuit breaker controller with fault recording function according to claim 1, characterized in that, The main control chip directly reads data from the three-phase power metering unit via USART communication.

6. The circuit breaker controller with fault recording function according to claim 1, characterized in that, The communication unit is a CAN module.

7. The circuit breaker controller with fault recording function according to claim 1, characterized in that, The human-machine interface includes a display module and a button module, which are connected to the main control chip.

8. The circuit breaker controller with fault recording function according to claim 1, characterized in that, The current acquisition unit is a current transformer.

9. The circuit breaker controller with fault recording function according to claim 1, characterized in that, The voltage acquisition unit is a capacitor voltage divider circuit.

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