Electronic circuit breaker with external terminal function multiplexing function

Abstract

The utility model relates to an electronic circuit breaker with an external terminal function multiplexing function, which comprises an electronic circuit breaker body, a terminal switching circuit is arranged in the electronic circuit breaker body, the electronic circuit breaker body comprises a seven-pin terminal, the terminal switching circuit comprises a main control module and a switching control module, and the main control module is connected with the switching control module. The main control module is coupled to the switching control module so as to output a control signal to the switching control module, and the switching control module is coupled to a 7-pin terminal of the electronic circuit breaker body so as to output a switching signal to the electronic circuit breaker body after receiving the control signal and switch on and off of the 7-pin terminal of the electronic circuit breaker body. According to the invention, the circuit breaker can realize remote switching-on and switching-off control, and can also realize the effect of communication maintenance.

Description

Technical Field

[0001] The present application relates to the field of electronic circuit breakers, and more particularly to an electronic circuit breaker with multiplexing of external terminal functions. Background Art

[0002] For existing photovoltaic circuit breakers, in order to distribute electrical energy and protect circuits, they need to communicate with the power distribution network, and communication terminals need to be externally connected to the circuit breaker. Generally, 7-pin terminals are used, including 485 communication terminals, remote control terminals for opening and closing, and active and reactive signal terminals.

[0003] During the use of the product, sometimes major software updates and upgrades are required; or maintenance personnel need to query fault conditions and access internal data of the machine. However, due to the limitations of the external structure of the circuit breaker and the test requirements of the power system EMC, it is very difficult to increase the number of external terminals. Therefore, only a choice of functions can be made. Those with remote opening and closing control do not have a maintenance communication port; those with a maintenance communication port do not have remote control, which greatly reduces the practicality of the photovoltaic circuit breaker. Therefore, there is a certain room for improvement. Summary of the Utility Model

[0004] In order to enable the circuit breaker to achieve both remote opening and closing control and maintenance communication, the present application provides an electronic circuit breaker with multiplexing of external terminal functions.

[0005] The technical solution adopted by the electronic circuit breaker with multiplexing of external terminal functions provided by the present application is as follows:

[0006] An electronic circuit breaker with multiplexing of external terminal functions includes an electronic circuit breaker body. A terminal switching circuit is provided inside the electronic circuit breaker body. The electronic circuit breaker body includes a 7-pin terminal. The terminal switching circuit includes a main control module and a switching control module. The main control module is coupled to the switching control module to output a control signal to the switching control module. The switching control module is coupled to the 7-pin terminal of the electronic circuit breaker body to output a switching signal to the electronic circuit breaker body after receiving the control signal, so as to switch the on-off state of the 7-pin terminal of the electronic circuit breaker body.

[0007] By adopting the above technical solution, when the electronic circuit breaker body is operating normally, the main control module does not output a control information signal, resulting in the switching control module being in a power-off state. The external terminals of the electronic circuit breaker body are used for remote opening and closing control. When the electronic circuit breaker body needs to communicate, the main control module outputs a control signal to the switching control module. After receiving the control signal, the switching control module outputs a terminal switching signal to the electronic circuit breaker body, and the external terminals of the electronic circuit breaker body are switched to the internal communication circuit. The communication terminals of the electronic circuit breaker body perform the communication function. After the communication function is used up, the main control module outputs a disconnection signal to the switching control module, and the switching control module outputs a cut-off signal to the electronic circuit breaker body. The external terminals of the electronic circuit breaker body are switched back to the remote opening and closing control terminal function, enabling the circuit breaker to achieve both remote opening and closing control and maintenance communication.

[0008] Optionally, the switching control module includes a triode, an optocoupler, and a two-contact relay. One end of the triode is electrically connected to the main control module, the other end of the triode is coupled to the optocoupler, the other end of the optocoupler is coupled to the two-contact relay, and the other end of the two-contact relay is electrically connected to the electronic circuit breaker body.

[0009] By adopting the above technical solution, when the electronic circuit breaker body is operating normally, the triode has no control signal input and is in an off state, the optocoupler is also in an off state, and the two-contact relay makes the external terminals of the electronic circuit breaker body be remote opening and closing control terminals, realizing the remote opening and closing control function. When the electronic circuit breaker body needs to communicate, the triode receives the control signal output by the main control module and is in a conducting state, the optocoupler is in a conducting state, and the two-contact relay is energized, making the external terminals of the electronic circuit breaker body be communication terminals, enabling the electronic circuit breaker body to achieve the communication function.

[0010] Optionally, the triode includes an NPN-type triode Q1. The base of the NPN-type triode Q1 is coupled to the main control module, the collector of the NPN-type triode Q1 is coupled to the optocoupler, and the emitter of the NPN-type triode Q1 is grounded.

[0011] Optionally, the optocoupler includes a light-emitting diode and a photosensitive triode. The anode of the light-emitting diode is coupled to the power supply voltage, the cathode of the light-emitting diode is coupled to the collector of the NPN-type triode Q1, the photosensitive triode is coupled to the light-emitting diode, the collector of the photosensitive triode is coupled to the two-contact relay, and the emitter of the photosensitive triode is grounded.

[0012] Optionally, the two-contact relay is coupled to the electronic circuit breaker body. The two-contact relay includes 8 pins. The eighth pin of the two-contact relay is coupled to the collector of the photosensitive triode. When working normally, the second pin and the third pin of the two-contact relay are coupled, and the sixth pin and the seventh pin are coupled. The second pin and the seventh pin of the two-contact relay are coupled to the remote switching terminals of the electronic circuit breaker body. The third pin and the sixth pin of the two-contact relay are coupled to the external terminals of the electronic circuit breaker body. The fourth pin and the fifth pin of the two-contact relay are coupled to the communication terminals of the electronic circuit breaker body.

[0013] By adopting the above technical solution, when the electronic circuit breaker body works normally, the second pin and the seventh pin of the two-contact relay are coupled to the remote switching terminals of the electronic circuit breaker body, and the third pin and the sixth pin of the two-contact relay are coupled to the external terminals of the electronic circuit breaker body. The external terminals of the electronic circuit breaker body perform the remote switching control function; when communication is required, the third pin and the fourth pin of the two-contact relay are coupled, and the sixth pin and the fifth pin are coupled, and the external terminals of the electronic circuit breaker body perform the communication function.

[0014] Optionally, the 7-pin terminals of the electronic circuit breaker body include 485 communication terminals, remote switching control terminals, active and reactive signal terminals.

[0015] Optionally, the main control module is a microprocessor or a microcontroller, which is used to control the conduction and disconnection of the triode according to a preset program

[0016] Optionally, the two-contact conversion relay adopts a double-contact relay structure, which has two normally closed contacts and two normally open contacts. Under normal conditions, the normally closed contacts are closed and the normally open contacts are open; when the relay is energized, the normally closed contacts are open and the normally open contacts are closed

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] When the electronic circuit breaker body works normally, no control signal is input to the triode, and it is in an off state. The optocoupler is also in an off state. The two-contact relay makes the external terminals of the electronic circuit breaker body become remote switching control terminals, realizing the remote switching control function. When the electronic circuit breaker body needs to communicate, the triode receives the control signal output by the main control module and is in a conducting state. The optocoupler is in a conducting state. The two-contact relay is energized, making the external terminals of the electronic circuit breaker body become communication terminals, enabling the electronic circuit breaker body to realize the communication function. Description of the Drawings

[0019] Figure 1 It is a module structure diagram of an electronic circuit breaker with multiplexing of external terminal functions according to an embodiment of the present application.

[0020] Figure 2 It is the circuit diagram of the terminal switching circuit of an electronic circuit breaker with external terminal function multiplexing in an embodiment of the present application.

[0021] Explanation of reference numerals: 1, main control module; 2, switching control module. Specific embodiments

[0022] The following will further elaborate on the present application in conjunction with the attached Figure 1-2 to further illustrate the present application in detail.

[0023] An embodiment of the present application discloses an electronic circuit breaker with external terminal function multiplexing. Referring to Figure 1-2 , an electronic circuit breaker with external terminal function multiplexing includes an electronic circuit breaker body. The electronic circuit breaker body includes a 7-pin terminal. The 7-pin terminal of the electronic circuit breaker body includes a 485 communication terminal, a remote closing and opening control terminal, and an active and reactive power signal terminal. A terminal switching circuit is provided inside the electronic circuit breaker body, and the terminal switching circuit includes a main control module 1 and a switching control module 2.

[0024] The main control module 1 is coupled to the switching control module 2 to output a control signal to the switching control module 2. The switching control module 2 is coupled to the 7-pin terminal of the electronic circuit breaker body to output a switching signal to the electronic circuit breaker body after receiving the control signal, thereby switching the power on and off of the 7-pin terminal of the electronic circuit breaker body.

[0025] The switching control module 2 includes a triode, an optocoupler, and a two-contact relay. The triode includes an NPN-type triode Q1. The base of the NPN-type triode Q1 is coupled to the main control module 1. The collector of the NPN-type triode Q1 is coupled to the optocoupler. The emitter of the NPN-type triode Q1 is grounded.

[0026] The optocoupler includes a light-emitting diode and a phototransistor. The anode of the light-emitting diode is coupled to the power supply voltage. The cathode of the light-emitting diode is coupled to the collector of the NPN-type triode Q1. The phototransistor is coupled to the light-emitting diode. The collector of the phototransistor is coupled to the two-contact relay. The emitter of the phototransistor is grounded.

[0027] The two-contact relay is coupled to the electronic circuit breaker body. The two-contact relay includes 8 pins. The eighth pin of the two-contact relay is coupled to the collector of the phototransistor. During normal operation, the second pin and the third pin of the two-contact relay are coupled, and the sixth pin and the seventh pin are coupled. The second pin and the seventh pin of the two-contact relay are coupled to the remote closing and opening terminal of the electronic circuit breaker body. The third pin and the sixth pin of the two-contact relay are coupled to the external terminal of the electronic circuit breaker body. The fourth pin and the fifth pin of the two-contact relay are coupled to the communication terminal of the electronic circuit breaker body

[0028] The implementation principle of an electronic circuit breaker with multiplexing of external terminal functions in an embodiment of this application is as follows: When the electronic circuit breaker body is operating normally, the main control module 1 outputs no control information signal, the triode receives no control signal and is in an off state, the optocoupler is also in an off state. The second and seventh pins of the two-contact relay are coupled to the remote closing and opening terminals of the electronic circuit breaker body, and the third and sixth pins of the two-contact relay are coupled to the external terminals of the electronic circuit breaker body. The external terminals of the electronic circuit breaker body perform the function of remote closing and opening control;

[0029] When the electronic circuit breaker body needs to communicate, the main control module 1 outputs a control signal to the switching control module 2. The triode receives the control signal output by the main control module 1 and is in a conducting state, the optocoupler is in a conducting state, the two-contact relay is energized, the third pin of the two-contact relay is coupled to the fourth pin, and the sixth pin is coupled to the fifth pin. The external terminals of the electronic circuit breaker body perform the communication function.

[0030] The above are all preferred embodiments of this application. Without limiting the protection scope of this application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An electronic circuit breaker with multiplexing of external terminal functions, characterized in that: It includes an electronic circuit breaker body, and a terminal switching circuit is arranged inside the electronic circuit breaker body. The electronic circuit breaker body includes a 7-pin terminal. The terminal switching circuit includes a main control module (1) and a switching control module (2). The main control module (1) is coupled to the switching control module (2) to output a control signal to the switching control module (2). The switching control module (2) is coupled to the 7-pin terminal of the electronic circuit breaker body. After receiving the control signal, it outputs a switching signal to the electronic circuit breaker body to switch the on / off state of the 7-pin terminal of the electronic circuit breaker body.

2. The electronic circuit breaker with external terminal function multiplexing according to claim 1, wherein: The switching control module (2) includes a triode, an optocoupler, and a two-contact relay. One end of the triode is electrically connected to the main control module (1), the other end of the triode is coupled to the optocoupler, the other end of the optocoupler is coupled to the two-contact relay, and the other end of the two-contact relay is electrically connected to the electronic circuit breaker body.

3. The electronic circuit breaker with external terminal function multiplexing according to claim 2, characterized in that: The triode includes an NPN-type triode Q1. The base of the NPN-type triode Q1 is coupled to the main control module (1), the collector of the NPN-type triode Q1 is coupled to the optocoupler, and the emitter of the NPN-type triode Q1 is grounded.

4. An electronic circuit breaker with external terminal function multiplexing according to claim 3, characterized in that: The optocoupler includes a light-emitting diode and a phototransistor. The anode of the light-emitting diode is coupled to the power supply voltage, the cathode of the light-emitting diode is coupled to the collector of the NPN-type triode Q1, the phototransistor is coupled to the light-emitting diode, the collector of the phototransistor is coupled to the two-contact relay, and the emitter of the phototransistor is grounded.

5. An electronic circuit breaker with external terminal function multiplexing according to claim 4, characterized in that: The two-contact relay is coupled to the electronic circuit breaker body. The two-contact relay includes 8 pins. The eighth pin of the two-contact relay is coupled to the collector of the phototransistor. When working normally, the second pin and the third pin of the two-contact relay are coupled, and the sixth pin and the seventh pin are coupled. The second pin and the seventh pin of the two-contact relay are coupled to the remote opening / closing terminal of the electronic circuit breaker body. The third pin and the sixth pin of the two-contact relay are coupled to the external terminal of the electronic circuit breaker body. The fourth pin and the fifth pin of the two-contact relay are coupled to the communication terminal of the electronic circuit breaker body.

6. The electronic circuit breaker with external terminal function multiplexing according to claim 1, characterized in that: The 7-pin terminal of the electronic circuit breaker body includes a 485 communication terminal, a remote opening / closing control terminal, and an active / reactive power signal terminal.

7. An electronic circuit breaker with external terminal function multiplexing according to claim 3, characterized in that: The main control module (1) is a microprocessor or a microcontroller, which is used to control the conduction and disconnection of the triode according to a preset program.

8. An electronic circuit breaker with external terminal function multiplexing according to claim 5, characterized in that: The two-contact relay adopts a double-contact relay structure, which has two normally closed contacts and two normally open contacts. Under normal conditions, the normally closed contacts are closed and the normally open contacts are open; when the relay is attracted, the normally closed contacts are open and the normally open contacts are closed.

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