CN219162576U

CN219162576U - Intelligent molded case circuit breaker controller

Info

Publication number: CN219162576U
Application number: CN202223568416.2U
Authority: CN
Inventors: 丁文军; 汪新波; 吕忠; 姚军军
Original assignee: HANGZHOU TIANMU ELECTRIC POWER TECHNOLOGY CO LTD
Current assignee: HANGZHOU TIANMU ELECTRIC POWER TECHNOLOGY CO LTD
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-09
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to an intelligent molded case circuit breaker controller. The problem of single function of the traditional circuit breaker is more remarkable. The utility model comprises a power supply circuit and is characterized by further comprising an electric parameter measuring circuit, a microcontroller circuit, a liquid crystal display, a communication circuit and an executing mechanism, wherein the power supply circuit is respectively connected with the electric parameter measuring circuit, the microcontroller circuit, the liquid crystal display and the communication circuit, the output of the electric parameter measuring circuit is connected with the microcontroller circuit, the output end of the microcontroller circuit is respectively connected with the input end of the liquid crystal display and the input end of the executing driving mechanism, and the electric parameter measuring circuit comprises a voltage sampling circuit, a current sampling circuit and a metering chip. The beneficial effects of the utility model are as follows: the three-phase voltage, three-phase current, three-phase power, electric quantity and other data of the molded case circuit breaker can be measured, the monitoring of the switch state is realized, the electric parameters can be recorded at regular time, and the basis is provided for big data analysis.

Description

Intelligent molded case circuit breaker controller

Technical Field

The utility model belongs to the technical field of controllers, and particularly relates to an intelligent molded case circuit breaker controller.

Background

The plastic shell circuit breaker is used as a basic component of basic power transmission and transformation, and plays a very important role in ensuring safe and reasonable operation of a power distribution system and electrical equipment. The molded case circuit breaker can automatically cut off the current after the current exceeds the trip setting. Plastic housing refers to the use of plastic insulators as the housing of the device to isolate the conductors from each other and from the grounded metal parts. The common low-voltage circuit breaker in the market at present belongs to a second-generation circuit breaker product, and has single function and only basic protection function. With the development of intelligent power grids and Internet of things in China, the requirements on the circuit breakers are higher and higher, and the problem of single functions of the traditional circuit breakers is more remarkable. Along with the requirements of smart power grid construction, the circuit breaker serving as a terminal electrical appliance is urgently required to have an electricity consumption parameter sensing function, so that the system can conveniently analyze electricity consumption big data, but various circuit breakers existing in the market still cannot meet the requirements of power grid construction in China nowadays.

Disclosure of Invention

The utility model aims at the problems and provides an intelligent molded case circuit breaker controller which measures parameters such as three-phase voltage, current, active power, reactive power, electric energy and the like and is provided with a communication interface for providing electricity consumption data for an electricity consumption system.

The utility model adopts the following technical scheme: the utility model provides an intelligence moulded case circuit breaker controller, includes power supply circuit, its characterized in that still includes electric parameter measurement circuit, microcontroller circuit, LCD, communication circuit and actuating mechanism, power supply circuit be connected with electric parameter measurement circuit, microcontroller circuit, LCD and communication circuit respectively, electric parameter measurement circuit's output is connected with microcontroller circuit, microcontroller circuit's output is connected with LCD's input and actuating mechanism's input respectively, electric parameter measurement circuit include voltage sampling circuit, current sampling circuit and measurement chip.

Preferably, the current sampling circuit is characterized in that a current transformer is used for respectively sampling three-phase electricity at an outlet port in the molded case circuit breaker to obtain IA+ and IA-, IB+ and IB-, IC+ and IC-signals, and the signals are sent to a sampling port of a metering chip after being conditioned by a resistor and a capacitor; the voltage sampling circuit is a sampling port for taking an ABC phase line at the inlet side of the molded case circuit breaker, and sending the ABC phase line into the metering chip after resistor voltage reduction.

Preferably, the metering chip outputs MISO, MOSI, SCK, CS signals in an SPI communication mode, and the four signals are connected with the microcontroller circuit.

Preferably, the power supply circuit is an AC/DC module, the input end of the power supply circuit is connected with a A, B, C phase line and a zero line N at the inlet of the molded case circuit breaker, and the output end of the power supply circuit is divided into 2 groups of power supplies.

Preferably, the microcontroller circuit comprises a microprocessor chip U2 and a memory U5, wherein the microprocessor chip adopts STM32F030, and a port of the microprocessor chip is connected with the SPI signal of the metering chip.

Preferably, the microprocessor chip U2 is connected to SDA and SCL signals of the memory U5 through an I2C bus, and a port of the microprocessor chip U2 is connected to the liquid crystal display IC 1.

Preferably, the communication circuit includes a microprocessor chip U2, a digital isolator U3 and a chip U4, wherein communication ports RX and TX of the microprocessor chip U2 are respectively connected with an input end of the digital isolator U3, and an isolation output end of the digital isolator U3 is connected with the interface chip U4.

Preferably, the type of the metering chip is ATT7022EU.

The beneficial effects of the utility model are as follows: the three-phase voltage, three-phase current, three-phase power, electric quantity and other data of the molded case circuit breaker can be measured, the monitoring of the switch state is realized, the electric parameters can be recorded at regular time, and the basis is provided for big data analysis.

Drawings

Fig. 1 is a schematic diagram of the system of the present utility model.

Fig. 2 is a schematic diagram of a power circuit of the present utility model.

Fig. 3 is a schematic diagram of an electrical parameter measurement circuit of the utility model.

Fig. 4 is a schematic diagram of the microcontroller circuit of the present utility model.

Detailed Description

The utility model will be further illustrated with reference to specific examples.

Referring to FIG. 1

An intelligent molded case circuit breaker controller comprises an electric parameter measuring circuit, a power supply circuit, a microcontroller circuit, a liquid crystal display, a communication circuit and an executing mechanism. The power supply circuit is respectively connected with the electric parameter measuring circuit, the microcontroller circuit, the liquid crystal display and the communication circuit. The output of the electrical parameter measuring circuit is connected with the microcontroller circuit. The output end of the microcontroller circuit is respectively connected with the input end of the liquid crystal display and the input end of the execution driving mechanism.

Referring to FIG. 2

The power supply circuit is an AC/DC module, the input end of the power supply circuit is connected with a A, B, C phase line and a zero line N at the inlet of the molded case circuit breaker, and the output end of the power supply circuit is divided into 2 groups of power supplies VDD and GND, V485 and V485-GND.

Referring to FIG. 3

The electric parameter measuring circuit comprises a voltage sampling circuit, a current sampling circuit and a metering chip, wherein the model of the metering chip U1 is ATT7022EU. The current sampling circuit is used for sampling three-phase electricity by using an outlet port of a current transformer in the molded case circuit breaker to obtain IA+ and IA-, IB+ and IB-, IC+ and IC-signals respectively, and sending the signals to a sampling port (V1P, V1N, V3P, V3N, V5P, V N) of a metering chip U1 after being conditioned by resistors (R7-R12, R16-R18) and capacitors (C13-C18); the voltage sampling circuit takes a A, B, C phase line of the wire inlet side of the molded case circuit breaker, and sends the phase line into a sampling port (V2P, V2N, V4P, V4N, V6P, V N) of a metering chip after the phase line is reduced by resistors (R1-R6).

And MISO, MOSI, SCK, CS signals of the SPI communication mode are output, and the four signals are connected with the microcontroller circuit.

Referring to FIG. 4

The microcontroller circuit comprises a microprocessor chip U2 and a memory U5. The microprocessor chip employs STM32F030, and the memory U5 employs EEPROM AT24C512 for storing parameters. The port of the microprocessor chip U2 is connected with the SPI signal of the metering chip (MISO, MOSI, SCK, CS); the microprocessor chip U2 is connected with SDA and SCL signals of the memory U5 through an I2C bus. The port of the microprocessor chip U2 is connected to the liquid crystal display IC 1.

The communication circuit comprises a digital isolator U3, a 485 interface and a chip U4, wherein communication ports RX and TX of a microprocessor chip U2 are respectively connected with the input end of the digital isolator U3, and the isolation output end of the digital isolator U3 is connected with the interface chip U4.

It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. The intelligent molded case circuit breaker controller comprises a power supply circuit and is characterized by further comprising an electric parameter measuring circuit, a microcontroller circuit, a liquid crystal display, a communication circuit and an executing mechanism, wherein the power supply circuit is respectively connected with the electric parameter measuring circuit, the microcontroller circuit, the liquid crystal display and the communication circuit, the output of the electric parameter measuring circuit is connected with the microcontroller circuit, the output end of the microcontroller circuit is respectively connected with the input end of the liquid crystal display and the input end of an executing driving mechanism, the electric parameter measuring circuit comprises a voltage sampling circuit, a current sampling circuit and a metering chip, the current sampling circuit respectively samples three-phase electricity by using an outgoing port of a current transformer in the molded case circuit breaker, IA+ signals, IB+ signals, IC+ signals and IC signals are respectively obtained, and the current signals are sent to sampling ports of the metering chip after being conditioned by resistors and capacitors; the voltage sampling circuit is a sampling port for taking an ABC phase line at the inlet side of the molded case circuit breaker, and sending the ABC phase line into the metering chip after resistor voltage reduction.

2. The intelligent molded case circuit breaker controller according to claim 1, wherein the metering chip outputs MISO, MOSI, SCK, CS signals in the form of SPI communication, and the four signals are connected to the microcontroller circuit.

3. The intelligent molded case circuit breaker controller according to claim 1, wherein the power circuit is an AC/DC module, the input terminal is connected with a A, B, C phase line and a zero line N at the inlet of the molded case circuit breaker, and the output terminal is divided into 2 groups of power supplies.

4. The intelligent molded case circuit breaker controller of claim 1, wherein the microcontroller circuit comprises a microprocessor chip U2 and a memory U5, the microprocessor chip is STM32F030, and a port of the microprocessor chip is connected with the metering chip SPI signal.

5. The controller of claim 4, wherein the microprocessor U2 is connected to SDA and SCL signals of the memory U5 via an I2C bus, and a port of the microprocessor U2 is connected to the liquid crystal display IC 1.

6. The intelligent molded case circuit breaker controller according to claim 5, wherein the communication circuit comprises a digital isolator U3 and a chip U4, the communication ports RX and TX of the microprocessor chip U2 are respectively connected with the input end of the digital isolator U3, and the isolation output end of the digital isolator U3 is connected with the interface chip U4.

7. The intelligent molded case circuit breaker controller of claim 1, wherein said metering chip is ATT7022EU.