Communication module accessory of molded case circuit breaker

Abstract

The utility model discloses a communication module accessory of a molded case circuit breaker. The communication module accessory comprises a microprocessor, an opening and closing circuit, an opening and closing state monitoring circuit, a first communication interface circuit and a second communication interface circuit, the input side of the opening and closing circuit is connected with the microprocessor, and the output side of the opening and closing circuit is connected with an electric operation mechanism accessory to perform opening operation or closing operation on the molded case circuit breaker; the output side of the opening and closing state monitoring circuit is connected with the microprocessor, and the input side of the opening and closing state monitoring circuit is connected with an alarm accessory of the molded case circuit breaker to monitor the opening and closing state of the molded case circuit breaker; the chip side of the first communication interface circuit is connected with the microprocessor, and the equipment side is in communication connection with the electronic controller module; the chip side of the second communication interface circuit is connected with the microprocessor, and the device side is in communication connection with the upper computer. Through the communication module accessory, remote management of the molded case circuit breaker can be realized.

Description

Technical Field

[0001] The utility model relates to the field of molded case circuit breakers, in particular to a communication module accessory of a molded case circuit breaker. Background Art

[0002] Electronic molded case circuit breakers are mainly used to realize four protection functions: long delay overload, short delay short circuit, instantaneous short circuit and ground fault. They also support accessories such as electric operating mechanism and auxiliary alarm contacts.

[0003] In order to facilitate the communication between the host computer and the electronic molded case circuit breaker, remotely control the opening and closing actions of the molded case circuit breaker, remotely obtain the opening and closing status of the molded case circuit breaker, and remotely view the current, fault records and setting value data in real time, remote opening, communication test tripping and other functions, it is necessary to develop a communication module accessory. Utility Model Content

[0004] The utility model provides a communication module accessory for a molded case circuit breaker, which is used to realize remote control and status acquisition of an electronic molded case circuit breaker by a host computer. The technical solution is as follows:

[0005] A communication module accessory for a molded case circuit breaker, comprising a microprocessor, an opening and closing circuit, an opening and closing state monitoring circuit, a first communication interface circuit and a second communication interface circuit;

[0006] The input side of the opening and closing circuit is connected to the microprocessor, and the output side is used to connect to the electric operating mechanism accessories of the molded case circuit breaker to perform remote opening or closing operations on the molded case circuit breaker;

[0007] The output side of the opening and closing state monitoring circuit is connected to the microprocessor, and the input side is used to connect to the alarm accessory of the molded case circuit breaker to detect the opening and closing state of the molded case circuit breaker;

[0008] The first communication interface circuit, whose chip side is connected to the microprocessor, and whose device side is communicatively connected to the electronic controller module of the molded case circuit breaker;

[0009] The chip side of the second communication interface circuit is connected to the microprocessor, and the device side of the second communication interface circuit is used for communication connection with the host computer.

[0010] Furthermore, the opening and closing circuit includes two relay circuits; wherein, when the relay of the first relay circuit is closed, a closing signal is output, and when the relay of the second relay circuit is closed, an opening signal is output.

[0011] Furthermore, the relay circuit includes an NPN transistor and a relay; the two ends of the coil of the relay are respectively connected to the driving power supply and the collector of the NPN transistor; the emitter of the NPN transistor is grounded, the base is grounded through a first resistor, and is connected to the microprocessor through a second resistor; the driving power supply is the input power supply of the communication module accessory.

[0012] Furthermore, the closing and opening state monitoring circuit includes two voltage conversion circuits and a three-terminal connector; wherein the input end of the first voltage conversion circuit, the input end of the second voltage conversion circuit and the signal ground are respectively connected to the three pins of the three-terminal connector, and the closing state signal, the opening state signal and the signal ground are respectively input; the output end of the first voltage conversion circuit and the output end of the second voltage conversion circuit are respectively connected to the microprocessor; the voltage conversion circuit performs the following operations: when the input end is suspended, the output end outputs a low-level signal; when the input end is grounded, the output end outputs a high-level signal.

[0013] Furthermore, the voltage conversion circuit includes a PNP transistor, whose collector is connected to the system power supply; its base is connected to the input end of the voltage conversion circuit through a third resistor, and is connected to the power supply through a fourth resistor; its collector is connected to the signal ground through a fifth resistor, and is connected to the output end of the voltage conversion circuit; the system power supply is the working power supply of the microprocessor.

[0014] Furthermore, the first communication interface circuit is a UART to RS485 circuit, wherein the chip side is a UART interface and the device side is an RS485 interface.

[0015] Furthermore, the second communication interface circuit is a UART to RS485 circuit, wherein the chip side is a UART interface and the device side is an RS485 interface.

[0016] Furthermore, it also includes two LED status indication circuits, which are connected to the microprocessor and are used to indicate the open state and the closed state respectively.

[0017] Furthermore, it also includes a power supply circuit, which generates a driving power supply through a DC-DC conversion circuit; and the driving power supply generates a system power supply through a DC step-down circuit.

[0018] The utility model achieves the following technical effects:

[0019] The host computer can remotely control the opening and closing actions of the molded case circuit breaker, remotely obtain the opening and closing status of the molded case circuit breaker, and remotely view the current, fault records and setting value data in real time, remote opening, communication test tripping and other functions through communication with the communication module accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an application block diagram of the communication module accessory of the utility model;

[0021] Figure 2 It is a circuit schematic diagram of a microprocessor circuit of a communication module accessory of the utility model;

[0022] Figure 3 It is a circuit schematic diagram of the power supply circuit of the communication module accessory of the utility model;

[0023] Figure 4 It is a circuit schematic diagram of the communication interface circuit of the communication module accessory of the utility model;

[0024] Figure 5 It is a circuit schematic diagram of the opening and closing circuit of the communication module accessory of the utility model;

[0025] Figure 6 The utility model discloses a circuit schematic diagram of a switch-on and switch-off state monitoring circuit of a communication module accessory. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in this field should be able to understand other possible implementations and advantages of the present invention.

[0027] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0028] like Figures 1 to 6 As shown, the utility model provides a circuit embodiment of a communication module accessory for a molded case circuit breaker. In this embodiment, the communication module accessory 2 includes a microprocessor circuit 22, a switch-on and switch-off circuit 23, a switch-on and switch-off state monitoring circuit 24, a first communication interface circuit 25, a second communication interface circuit 26, a power supply circuit 21, and an indication circuit and other functional modules. Among them:

[0029] The microprocessor circuit 22 mainly includes the microprocessor U1 and its peripheral reset circuit, clock circuit, etc. The microprocessor U1 adopts a high-speed, low-power 32-bit ARM microprocessor as the core processing unit; the power supply circuit 21 is connected to an external power supply VDD (DC12V-24V), and generates a 12V power supply through a DC-DC circuit composed of a power management chip U5 to supply power to the opening and closing circuit 23. The 12V power supply is stepped down by the power management chip U2 to generate a power supply VCC (3.3V) to supply power to the microprocessor circuit 22, the first communication interface circuit 25, the second communication interface circuit 26, the opening and closing state monitoring circuit 24 and the state indication circuit. The first communication interface circuit 25 and the second communication interface circuit 26 use a standard RS485 interface, which can realize communication with the host computer and the electronic controller module 5 of the molded case circuit breaker, and can view the current, fault records and setting value data in real time through the electronic controller module 5. The microprocessor circuit 22 remotely controls the electric operating mechanism attachment 3 through the opening and closing circuit 23, controls the opening and closing action of the molded case circuit breaker, and then obtains the opening and closing state signal of the alarm attachment 4 of the molded case circuit breaker through the opening and closing state monitoring circuit 24. The host computer (such as a cloud platform or a management terminal) communicates with the communication module attachment 2, and can remotely control the opening and closing action of the molded case circuit breaker, remotely obtain the opening and closing state of the molded case circuit breaker, and remotely view the current, fault records and setting value data in real time, remote opening, communication test tripping and other functions.

[0030] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A communication module accessory for a molded case circuit breaker, characterized in that: It includes a microprocessor, an opening and closing circuit, an opening and closing state monitoring circuit, a first communication interface circuit and a second communication interface circuit; The input side of the opening and closing circuit is connected to the microprocessor, and the output side is used to connect to the electric operating mechanism accessories of the molded case circuit breaker to perform remote opening or closing operations on the molded case circuit breaker; The output side of the opening and closing state monitoring circuit is connected to the microprocessor, and the input side is used to connect to the alarm accessory of the molded case circuit breaker to detect the opening and closing state of the molded case circuit breaker; The first communication interface circuit, whose chip side is connected to the microprocessor, and whose device side is communicatively connected to the electronic controller module of the molded case circuit breaker; The chip side of the second communication interface circuit is connected to the microprocessor, and the device side of the second communication interface circuit is used for communication connection with the host computer.

2. The communication module accessory according to claim 1, characterized in that: The opening and closing circuit includes two relay circuits; wherein, when the relay of the first relay circuit is closed, a closing signal is output, and when the relay of the second relay circuit is closed, an opening signal is output.

3. The communication module accessory according to claim 2, characterized in that: The relay circuit includes an NPN transistor and a relay; the two ends of the coil of the relay are respectively connected to a driving power supply and a collector of the NPN transistor; the emitter of the NPN transistor is grounded, the base is grounded through a first resistor, and is connected to a microprocessor through a second resistor; the driving power supply is the input power supply of the communication module accessory.

4. The communication module accessory according to claim 1, characterized in that: The closing and opening state monitoring circuit includes two voltage conversion circuits and a three-terminal connector; wherein the input end of the first voltage conversion circuit, the input end of the second voltage conversion circuit and the signal ground are respectively connected to the three pins of the three-terminal connector, and the closing state signal, the opening state signal and the signal ground are respectively input; the output end of the first voltage conversion circuit and the output end of the second voltage conversion circuit are respectively connected to the microprocessor; the voltage conversion circuit performs the following operations: when the input end is suspended, the output end outputs a low-level signal; when the input end is grounded, the output end outputs a high-level signal.

5. The communication module accessory according to claim 4, characterized in that: The voltage conversion circuit includes a PNP transistor, whose collector is connected to the system power supply; whose base is connected to the input end of the voltage conversion circuit through a third resistor, and connected to the power supply through a fourth resistor; Its collector is connected to the signal ground through a fifth resistor and is connected to the output end of the voltage conversion circuit; the system power supply is the working power supply of the microprocessor.

6. The communication module accessory according to claim 1, characterized in that: The first communication interface circuit is a UART to RS485 circuit, wherein the chip side is a UART interface and the device side is an RS485 interface.

7. The communication module accessory according to claim 1, characterized in that: The second communication interface circuit is a UART to RS485 circuit, wherein the chip side is a UART interface and the device side is an RS485 interface.

8. The communication module accessory according to claim 1, characterized in that: It also includes two LED status indication circuits, which are connected to the microprocessor and are used to indicate the opening status and the closing status respectively.

9. The communication module accessory according to claim 1, characterized in that: It also includes a power supply circuit, which generates a driving power supply through a DC-DC conversion circuit; and the driving power supply generates a system power supply through a DC step-down circuit.

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