CN211629931U - Communication module for intelligent circuit breaker - Google Patents
Communication module for intelligent circuit breaker Download PDFInfo
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- CN211629931U CN211629931U CN202020069160.2U CN202020069160U CN211629931U CN 211629931 U CN211629931 U CN 211629931U CN 202020069160 U CN202020069160 U CN 202020069160U CN 211629931 U CN211629931 U CN 211629931U
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Abstract
Communication module for a smart circuit breaker, comprising: a main control chip; the first RS485 communication unit is connected with the main control chip, and the main control chip is in communication connection with the intelligent circuit breaker through the first RS485 communication unit; the second RS485 communication unit is connected with the main control chip, and the main control chip is in communication connection with the concentrator through the second RS485 communication unit; the data storage unit is connected with the main control chip; and the power supply module supplies power to the main control chip, the first RS485 communication unit and the second RS485 communication unit. The utility model discloses a communication module passes through the RS485 circuit and links to each other with intelligent circuit breaker and concentrator respectively, realizes the mutual and measurement data's of communication between intelligent circuit breaker and the concentrator storage, has expanded switch circuit breaker's remote communication and electric energy management function.
Description
Technical Field
The utility model belongs to the technical field of low-voltage switchgear and controlgear, concretely relates to a communication module for intelligent moulded case circuit breaker.
Background
In order to practically strengthen the management of the power demand side, promote energy conservation and emission reduction, improve the utilization efficiency of electric energy and realize intelligent configuration of power resources, the intelligent construction of a power distribution station area becomes a trend. The low-voltage molded case circuit breaker is one of key equipment applied to a distribution station area, and is generally installed on a three-phase alternating current side at the rear end of a 10KV power transformer. The intelligent molded case circuit breaker is formed by improving the traditional mechanical molded case circuit breaker by adding an intelligent function, the working voltage of the intelligent molded case circuit breaker is generally 400V, the current is 100A-400A and the like, and the intelligent molded case circuit breaker has the functions of switch state monitoring, displaying, electric energy sampling, electric energy metering management, remote communication, current protection and the like. The volume of the molded case circuit breaker is limited, the space inside the circuit breaker is limited, the working current of the circuit breaker is large, the internal temperature is high, flammable and explosive devices such as a battery and a large capacitor cannot be installed in the circuit breaker generally, a module with the functions of electric energy data storage and management cannot be arranged inside the circuit breaker, and the interaction communication with a concentrator and the electric energy management are still to be improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a communication module for intelligent circuit breaker for the remote communication and the electric energy management function of extension switch circuit breaker.
In order to achieve the above object, the present invention adopts the following technical solutions:
communication module for a smart circuit breaker, comprising: a main control chip; the first RS485 communication unit is connected with the main control chip, and the main control chip is in communication connection with the intelligent circuit breaker through the first RS485 communication unit; the second RS485 communication unit is connected with the main control chip, and the main control chip is in communication connection with the concentrator through the second RS485 communication unit; the data storage unit is connected with the main control chip; and the power supply module supplies power to the main control chip, the first RS485 communication unit and the second RS485 communication unit.
More specifically, the main control chip adopts a SWF2G11B type control chip of Huiyi microelectronics Inc. in Zhuhai.
Further, the first RS485 communication unit and the second RS485 communication unit both comprise RS485 communication chips connected with the main control chip, and an optical coupling isolation circuit is arranged between the RS485 communication chips and the main control chip.
Further, the static protection circuit is arranged at the input end and/or the output end of the first RS485 communication unit and at the input end and/or the output end of the second RS485 communication unit.
More specifically, the electrostatic protection circuit is composed of a transient suppressor and a PTC thermistor, the thermistor is connected in series to the input and/or output of the first RS485 communication unit and the input and/or output of the second RS485 communication unit, and the transient suppressor is connected in parallel with the thermistor.
Further, the data storage unit is an EEPROM memory.
More specifically, the power supply module comprises an overvoltage protection circuit, a switching power supply chip, a pulse transformer, a first rectification filter circuit, a second rectification filter circuit, a third rectification filter circuit, a first voltage stabilizing circuit, a second voltage stabilizing circuit and a third voltage stabilizing circuit; the input end of the overvoltage protection circuit is connected with a phase line L and a zero line N of commercial power, the output end of the overvoltage protection circuit is connected with the input end of the switch power supply chip, the output end of the switch power supply chip is connected with the pulse transformer, the pulse transformer converts the input commercial power into 3 paths of direct current power supplies which are respectively output to the first rectification filter circuit, the second rectification filter circuit and the third rectification filter circuit, the output end of the first rectification filter circuit is connected with the first voltage stabilizing circuit, the output end of the second rectification filter circuit is connected with the second voltage stabilizing circuit, and the output end of the third rectification filter circuit is connected with the third voltage stabilizing circuit.
Furthermore, the output end of the third voltage stabilizing circuit is connected with a voltage reducing circuit.
Furthermore, the power module further comprises a feedback adjusting circuit, the feedback adjusting circuit comprises a sampling resistor, an optical coupler and a reference voltage stabilizing chip, two output ends of the optical coupler are respectively connected with an EN/UV pin and a BP/M pin of the switching power supply chip, two input ends of the optical coupler are respectively connected with an output end of the third rectifying and filtering circuit and the reference voltage stabilizing chip, and the voltage stabilizing chip is connected with an output end of the third rectifying and filtering circuit through the sampling resistor.
And further, the intelligent power supply further comprises 4 paths of LED indicating circuits which are respectively used for indicating the power supply state and the fault state of the first RS485 communication unit, the second RS485 communication unit and the communication module.
According to the above technical scheme, the utility model discloses a communication module passes through the RS485 circuit and links to each other with intelligent circuit breaker and concentrator respectively, realize the communication interaction between intelligent circuit breaker and the concentrator, intelligent circuit breaker can regularly gather intelligent moulded case circuit breaker's instantaneous electric energy data after, regularly the electric energy freezes and settles accounts, and save the metering data in the inside data storage unit of communication module, when communication module receives the data reading order of concentrator down, can send the electric energy settlement data of saving in the data storage unit for the concentrator, realize the last intercommunication of intelligent circuit breaker and the storage and the management of the three-phase electric energy data that intelligent circuit breaker gathered.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a circuit block diagram of an embodiment of the present invention;
fig. 2 is a circuit block diagram of the power module according to the embodiment of the present invention.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Detailed Description
In order to make the above and other objects, features and advantages of the present invention more apparent, the following embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the communication module of this embodiment includes a main control chip, and a first RS485 communication unit, a second RS485 communication unit, a data storage unit, and a power module that are connected to the main control chip. The main control chip of this embodiment adopts the SWF2G11B type control chip of Hui-microelectronics Limited in Zhuhai, and this chip internal integration has the high accuracy clock to can just can realize the high accuracy clock function with no external crystal oscillator or clock chip, can not cause crystal stall or frequency offset problem because of adverse circumstances such as dust, humidity.
The main control chip is respectively connected with the first RS485 communication unit and the second RS485 communication unit through serial ports (UART interfaces), the first RS485 communication unit is connected with the molded case circuit breaker and used for achieving downlink communication of the molded case circuit breaker, the second RS485 communication unit is connected with the concentrator and used for achieving uplink communication of the molded case circuit breaker, and the uplink and downlink communication of the communication module adopts a DL/T645 communication protocol and supports communication protocols of a DL/T645-97 version and a DL/T645-07 version. The utility model discloses a first, second RS485 communication unit all includes RS485 communication chip, and RS485 communication chip links to each other with main control chip, and the RS485 communication chip of this embodiment adopts Shanghai beiling company's model to be BL 3085's RS485 communication chip, and this chip is antistatic up to 15KV, and is compatible good. Furthermore, an optical coupling isolation circuit is arranged between the main control chip and the RS485 communication chip, and the interfaces of the main control chip and the RS485 communication chip are isolated from each other by the optical coupling isolation circuit, so that independent power supply is realized, and the isolation voltage-withstanding and ESD interference-rejection performance is good. Furthermore, an electrostatic protection circuit is arranged at the input end and/or the output end of the first RS485 communication unit and the second RS485 communication unit, the electrostatic protection circuit is composed of a transient suppressor and a PTC thermistor, the thermistor is connected in series at the input end/output end of the RS485 communication unit, and the transient suppressor is connected with the thermistor in parallel, so that the electrostatic protection is realized, and the master control chip is prevented from being damaged by electrostatic overvoltage of a 485 port.
The data storage unit of the embodiment is an EEPROM, the EEPROM is in communication connection with the main control chip in an IIC communication mode, and the data storage unit is used for storing metering data. The power module is connected with commercial power, and after converting 220V alternating current into direct current, provides working power supply for each circuit in the communication module, provides 12V power output of the same path, and provides working power supply for the molded case circuit breaker. As shown in fig. 2, the power module of this embodiment includes a switching power chip, a pulse transformer, an overvoltage protection circuit, a first rectifying and filtering circuit, a second rectifying and filtering circuit, a third rectifying and filtering circuit, a first voltage regulator circuit, a second voltage regulator circuit, and a third voltage regulator circuit. The model of the switching power supply chip is TNY280G, the chip integrates current limiting, over-temperature, overvoltage short circuit and other protection circuits, the maximum power consumption is 20W, and the power consumption requirements of a communication module and a molded case circuit breaker can be met. The input end of the overvoltage protection circuit is connected with a phase line L and a zero line N of the commercial power, and the output end of the overvoltage protection circuit is connected with the input end of the switching power supply chip. The overvoltage protection circuit of the embodiment comprises a piezoresistor, a safety capacitor and a common mode coil, wherein the piezoresistor and the safety capacitor are connected in parallel between a phase line L and a zero line N of a mains supply, and the common mode coil is connected in series between the phase line L of the mains supply and the input end of the switching power supply chip. The output end of the switch power supply chip is connected with a pulse transformer, the pulse transformer isolates strong current and weak current, and converts input commercial power into 3 paths of direct current power supplies which are respectively output to the first rectifying and filtering circuit, the second rectifying and filtering circuit and the third rectifying and filtering circuit. The isolation withstand voltage between the three paths of direct current power supplies output by the pulse transformer meets 4KV, and the problem of unstable communication caused by mutual interference and electrostatic disturbance of the up-and-down communication of the intelligent plastic shell communication module can be solved.
The output end of the first rectifying and filtering circuit is connected with a first voltage stabilizing circuit, and the first voltage stabilizing circuit outputs 5V direct-current voltage outwards to supply power for the main control chip; the output end of the second rectifying and filtering circuit is connected with a second voltage stabilizing circuit, and the second voltage stabilizing circuit outputs 5V direct-current voltage outwards to supply power for the first RS485 communication unit; the output end of the third rectifying and filtering circuit is connected with the third voltage stabilizing circuit, the third voltage stabilizing circuit outputs 12V direct current voltage outwards to supply power for the molded case circuit breaker, the output end of the third voltage stabilizing circuit is simultaneously connected with an LDO voltage reducing circuit, the 12V direct current is converted into 5V direct current to supply power for the second RS485 communication unit, and the LDO voltage reducing circuit of the embodiment adopts an LDO voltage stabilizing chip with the model of SW78S50 of Hui-electronics Limited company in Zhuhai. The first, second and third rectifying and filtering circuits are used for rectifying and smoothing the output voltage of the pulse transformer, and more specifically, the rectifying and filtering circuits are composed of Schottky diodes and electrolytic capacitors which are connected in parallel.
In order to increase the stability of the power supply, the power supply module further comprises a feedback regulating circuit connected with the switching power supply chip, wherein the feedback regulating circuit comprises a sampling resistor, an optical coupler (model number is EL817) and a reference voltage stabilizing chip (model number is AZ 431). Two output ends of the optical coupler are respectively connected with an EN/UV pin and a BP/M pin of the switching power supply chip, two input ends of the optical coupler are respectively connected with an output end of the third rectifying and filtering circuit and the reference voltage stabilizing chip, the voltage stabilizing chip is connected with the output end of the third rectifying and filtering circuit through the sampling resistor, and the voltage stabilizing chip provides a reference voltage (2.5V) to stably output the output voltage.
As a preferred embodiment of the utility model, communication module still includes 4 way LED indicating circuit, is used for instructing first RS485 communication unit, second RS485 communication unit and communication module power state and fault condition respectively.
The utility model discloses communication module's main control chip establishes the communication relation between its circuit breaker and the concentrator according to the instruction, and main control chip communicates with moulded case circuit breaker through first RS485 communication unit, regularly gathers moulded case circuit breaker's instantaneous electric energy data and is used for the electric energy settlement and freezes, stores the measurement data in the EEPROM inside communication module; and the second RS485 communication unit is used for carrying out uplink communication with the concentrator, and after a data reading command sent by the concentrator is received, the electric energy settlement data stored in the EEPROM is sent to the concentrator.
The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the same, although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced with equivalents, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered by the scope of the present invention.
Claims (10)
1. Communication module for an intelligent circuit breaker, comprising:
a main control chip;
the first RS485 communication unit is connected with the main control chip, and the main control chip is in communication connection with the intelligent circuit breaker through the first RS485 communication unit;
the second RS485 communication unit is connected with the main control chip, and the main control chip is in communication connection with the concentrator through the second RS485 communication unit;
the data storage unit is connected with the main control chip;
and the power supply module supplies power to the main control chip, the first RS485 communication unit and the second RS485 communication unit.
2. The communication module for smart circuit breaker of claim 1 wherein: the main control chip adopts a SWF2G11B type control chip of Huiyou micro-electronics Limited in Zhuhai.
3. The communication module for smart circuit breaker of claim 1 wherein: the first RS485 communication unit and the second RS485 communication unit both comprise RS485 communication chips connected with the main control chip, and an optical coupling isolation circuit is arranged between the RS485 communication chips and the main control chip.
4. The communication module for intelligent circuit breakers of claim 1 or 3, characterized in that: still include the electrostatic protection circuit, the electrostatic protection circuit set up in the input and/or the output of first RS485 communication unit and set up in the input and/or the output of second RS485 communication unit.
5. The communication module for smart circuit breaker of claim 4 wherein: the static protection circuit is composed of a transient suppressor and a PTC thermistor, the thermistor is connected in series with the input end and/or the output end of the first RS485 communication unit and the input end and/or the output end of the second RS485 communication unit, and the transient suppressor is connected in parallel with the thermistor.
6. The communication module for smart circuit breaker of claim 1 wherein: the data storage unit is an EEPROM memory.
7. The communication module for smart circuit breaker of claim 1 wherein: the power supply module comprises an overvoltage protection circuit, a switching power supply chip, a pulse transformer, a first rectification filter circuit, a second rectification filter circuit, a third rectification filter circuit, a first voltage stabilizing circuit, a second voltage stabilizing circuit and a third voltage stabilizing circuit;
the input end of the overvoltage protection circuit is connected with a phase line L and a zero line N of commercial power, the output end of the overvoltage protection circuit is connected with the input end of the switch power supply chip, the output end of the switch power supply chip is connected with the pulse transformer, the pulse transformer converts the input commercial power into 3 paths of direct current power supplies which are respectively output to the first rectification filter circuit, the second rectification filter circuit and the third rectification filter circuit, the output end of the first rectification filter circuit is connected with the first voltage stabilizing circuit, the output end of the second rectification filter circuit is connected with the second voltage stabilizing circuit, and the output end of the third rectification filter circuit is connected with the third voltage stabilizing circuit.
8. The communication module for smart circuit breaker of claim 7 wherein: and the output end of the third voltage stabilizing circuit is connected with a voltage reducing circuit.
9. The communication module for smart circuit breaker of claim 7 wherein: the power supply module further comprises a feedback adjusting circuit, the feedback adjusting circuit comprises a sampling resistor, an optical coupler and a reference voltage stabilizing chip, two output ends of the optical coupler are respectively connected with an EN/UV pin and a BP/M pin of the switching power supply chip, two input ends of the optical coupler are respectively connected with an output end of the third rectifying and filtering circuit and the reference voltage stabilizing chip, and the voltage stabilizing chip is connected with an output end of the third rectifying and filtering circuit through the sampling resistor.
10. The communication module for smart circuit breaker of claim 1 wherein: the intelligent communication terminal also comprises 4 paths of LED indicating circuits which are respectively used for indicating the power supply state and the fault state of the first RS485 communication unit, the second RS485 communication unit and the communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020069160.2U CN211629931U (en) | 2020-01-13 | 2020-01-13 | Communication module for intelligent circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020069160.2U CN211629931U (en) | 2020-01-13 | 2020-01-13 | Communication module for intelligent circuit breaker |
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| Publication Number | Publication Date |
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| CN211629931U true CN211629931U (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020069160.2U Active CN211629931U (en) | 2020-01-13 | 2020-01-13 | Communication module for intelligent circuit breaker |
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| CN (1) | CN211629931U (en) |
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