CN214585872U - Fault tripping remote indicating device and circuit breaker - Google Patents
Fault tripping remote indicating device and circuit breaker Download PDFInfo
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- CN214585872U CN214585872U CN202120289206.6U CN202120289206U CN214585872U CN 214585872 U CN214585872 U CN 214585872U CN 202120289206 U CN202120289206 U CN 202120289206U CN 214585872 U CN214585872 U CN 214585872U
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Abstract
The utility model discloses a fault tripping remote indicating device and a circuit breaker, wherein the fault tripping remote indicating device comprises a signal acquisition module, a main control module, an alarm module and a power module, wherein the signal acquisition module is used for acquiring and conditioning current signals in a loop; the main control module is connected with the signal acquisition module and comprises a storage unit, and the storage unit is used for storing fault data; the alarm module is connected with the main control module and comprises a remote communication unit, and the remote communication unit is used for transmitting alarm signals to the monitoring platform and the handheld terminal of the user; the power module is respectively connected with the signal acquisition module, the main control module and the alarm module, and the power module is used for providing a working power supply, can remotely send a fault alarm signal and shortens the fault processing time.
Description
Technical Field
The utility model relates to a low-voltage apparatus technical field, in particular to long-range indicating device of trouble dropout and circuit breaker.
Background
The circuit breaker is used as a main control electric appliance widely used in an electric power supply and distribution system, and has the problems that the rated current of a relevant system can be normally switched on and off, the short-circuit fault current of the relevant system can be quickly and reliably switched off selectively when the relevant system has a fault, the override trip or the movement rejection phenomenon cannot occur, a user cannot be remotely alarmed when the existing circuit breaker has a fault trip, the user cannot timely receive feedback information, the maintenance cannot be timely carried out, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a trouble dropout remote indicator and circuit breaker can long-rangely send failure alarm signal, shortens the fault handling time.
In a first aspect, an embodiment of the present invention provides a remote indicating device for fault tripping, which includes a signal acquisition module, a main control module, an alarm module and a power module, wherein the signal acquisition module is used for acquiring and conditioning a current signal in a loop; the main control module is connected with the signal acquisition module and comprises a storage unit, and the storage unit is used for storing fault data; the alarm module is connected with the main control module and comprises a remote communication unit, and the remote communication unit is used for transmitting alarm signals to the monitoring platform and the handheld terminal of the user; the power module is respectively connected with the signal acquisition module, the main control module and the alarm module, and is used for providing a working power supply.
According to the utility model provides a remote indicating device that trips breaks down has following beneficial effect at least: the remote indicating device for the fault tripping comprises a signal acquisition module, a main control module, an alarm module and a power supply module, wherein the power supply module is respectively connected with the signal acquisition module, the main control module and the alarm module, working power is provided by the power supply module to ensure the normal working state, the signal acquisition module acquires current signals in a loop and performs conditioning and amplification, the main control module is connected with the signal acquisition module, the main control module receives the current signals from the signal acquisition module and performs operation judgment, the main control module comprises a storage unit, fault data is stored by the storage unit, the main control module has self-diagnosis capability, the alarm module is connected with the main control module, the alarm module comprises a remote communication unit, and when the loop fails, the remote communication unit can send alarm signals to an inherent monitoring platform and a handheld terminal of a binding user to remind the user of the fault condition of the line, the user of being convenient for receives alarm information at any time, can in time carry out the fault maintenance, shortens the fault handling time, makes the circuit breaker have more the practicality.
According to some embodiments of the utility model, the remote communication unit includes RS485 communication interface and WIFI communication interface. When the circuit breaker breaks down and trips, line fault alarm information can be timely sent to a monitoring platform and a user handheld terminal through an RS485 communication interface and a WIFI communication interface, remote alarm indication is achieved, instantaneity is high, fault processing time is effectively shortened, the RS485 communication interface is arranged and is communicated with an upper computer, the four-remote function can be achieved, detailed data such as phase sequence, reasons and tripping time of tripping caused by the fact that tripping is caused are recorded and inquired, and operation and maintenance cost is effectively reduced.
According to the utility model discloses a some embodiments still include human-computer interaction module, human-computer interaction module with host system connects, human-computer interaction module includes operating panel, operating panel is provided with the status display district, the status display district includes Chinese display screen of liquid crystal and status indicator lamp, the status display district is used for showing the running state and the running parameter of circuit breaker. Make the circuit breaker more have the visualization through setting up the human-computer interaction module, operating panel is provided with the status display district, the status display district includes Chinese display screen of liquid crystal and status indicator lamp, Chinese display screen of liquid crystal shows the various operating parameters of circuit breaker, through setting up the status indicator lamp, can instruct the running state of circuit breaker, after taking place the outage tripping operation, the status display district shows fault information in real time, the user can see detailed feedback information, confirm the reason that arouses the tripping operation, be convenient for carry out the breakdown maintenance.
According to the utility model discloses a some embodiments, operating panel still is provided with divide-shut brake instruction window, divide-shut brake instruction window shows red for the combined floodgate state, divide-shut brake instruction window shows green for the separating brake state. The operation panel is provided with the switching-on and switching-off indication window, a prompt effect can be achieved more visually, the switching-on and switching-off indication window displays red to show a switching-on state through normal power transmission for the circuit breaker, and when a power-off tripping condition occurs, the switching-on and switching-off indication window displays green to show a switching-off state.
According to the utility model discloses a some embodiments, operating panel still is provided with the key operation district, the key operation district is provided with state operating button, function setting button and power setting button. Through setting up the key operation district at operating panel, the key operation is simple and convenient, and the key operation district is provided with state operating button, function setting button and power setting button, is convenient for close a floodgate, separating brake operation and functional test, makes things convenient for daily use.
According to some embodiments of the utility model, the power sets up the button and is provided with earth leakage protection and keeps off the position, and earth leakage protection closes and keeps off position and electric leakage monitoring and keep off the position. Set up the button with the power and switch to earth leakage protection and keep off the position, the whole functions of sign circuit breaker are opened, switch to earth leakage protection and close and keep off the whole functions of position circuit breaker and close, when carrying out emergent maintenance, will keep off the position and switch to earth leakage monitoring and keep off the position, the circuit breaker only monitors the electric leakage function, does not possess earth leakage protection tripping operation function, convenient operation, the daily use of being convenient for.
According to the utility model discloses a some embodiments, operating panel is provided with manual divide-shut brake screw. Through setting up manual divide-shut brake screw, can carry out installation and debugging to the circuit breaker, the manual divide-shut brake operation that carries on makes the circuit breaker have more the practicality.
According to some embodiments of the utility model, still include the potentiometre, the potentiometre with master control module connects. The magnitude of tripping current can be adjusted by setting the potentiometer, and the potentiometer is connected with the main control module, so that current parameters are more accurate and reliable, and the current breaking precision of the circuit breaker is improved.
According to some embodiments of the utility model, still including maintaining interface and drive interface, maintain the interface with drive interface respectively with host system connects. The maintenance interface is arranged, so that equipment can be maintained and debugged conveniently, when the main loop breaks down, the main control module judges and compares through operation, and a tripping signal is output through the driving interface, so that the breaker can cut off a fault circuit in time, and the normal operation of the system is guaranteed.
In a second aspect, an embodiment of the present invention provides a circuit breaker, including the above first aspect, a fault tripping remote indication device.
According to the utility model provides a pair of circuit breaker has following beneficial effect at least: the circuit breaker comprises the fault trip remote indicating device of the first aspect, the fault trip remote indicating device comprises a signal acquisition module, a main control module, an alarm module and a power module, the power module is respectively connected with the signal acquisition module, the main control module and the alarm module, working power is provided by the power module to ensure normal working state, the signal acquisition module acquires current signals in a loop and conditions and amplifies the current signals, the main control module is connected with the signal acquisition module, the main control module receives the current signals from the signal acquisition module and carries out operation judgment, the main control module comprises a storage unit, fault data are stored by the storage unit, the main control module has self-diagnosis capability, the alarm module is connected with the main control module, the alarm module comprises a remote communication unit, and when the loop fails, the alarm signal can be sent to an inherent monitoring platform and a handheld terminal of a binding user by the remote communication unit, reminding the user line the trouble condition, the user of being convenient for receives alarm information at any time, can in time carry out the fault repair, shortens the fault handling time, makes the circuit breaker have more the practicality.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Additional aspects and advantages of the present invention will become apparent from and will be readily appreciated by reference to the following description of the embodiments taken in conjunction with the accompanying drawings,
wherein:
fig. 1 is a block diagram of a hardware module of a trip fault remote indicating device according to an embodiment of the present invention;
fig. 2 is a block diagram of hardware modules of a fault trip remote indication apparatus according to some embodiments of the first aspect of the present invention;
fig. 3 is a schematic view of an operating panel of some embodiments of the first aspect of the present invention;
fig. 4 is a block diagram of hardware modules of a fault trip remote indication apparatus according to some embodiments of the first aspect of the present invention;
fig. 5 is a schematic diagram of a terminal of a circuit breaker according to some embodiments of the second aspect of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, a first embodiment of the present invention provides a fault tripping remote indicating device 100, including a signal acquisition module 110, a main control module 120, an alarm module 130, and a power module 140, where the signal acquisition module 110 is configured to acquire and condition a current signal in a loop; the main control module 120 is connected with the signal acquisition module 110, the main control module 120 includes a storage unit 121, and the storage unit 121 is used for storing fault data; the alarm module 130 is connected with the main control module 120, the alarm module 130 comprises a remote communication unit 131, and the remote communication unit 131 is used for transmitting alarm signals to the monitoring platform and the handheld terminal of the user; the power module 140 is respectively connected to the signal acquisition module 110, the main control module 120 and the alarm module 130, and the power module 140 is configured to provide a working power.
The remote fault trip indicating device 100 comprises a signal acquisition module 110, a main control module 120, an alarm module 130 and a power module 140, wherein the power module 140 is respectively connected with the signal acquisition module 110, the main control module 120 and the alarm module 130, working power is provided by the power module 140 to ensure a normal working state, the signal acquisition module 110 acquires a current signal in a loop and performs conditioning and amplification, the main control module 120 is connected with the signal acquisition module 110, the main control module 120 receives the current signal from the signal acquisition module 110 and performs operation judgment, the main control module 120 comprises a storage unit 121, fault data is stored by the storage unit 121, the main control module 120 has self-diagnosis capability, the alarm module 130 is connected with the main control module 120, the alarm module 130 comprises a remote communication unit 131, and when the loop fails, the alarm signal can be sent to an inherent monitoring platform and a handheld terminal of a binding user by the remote communication unit 131, reminding the user line the trouble condition, the user of being convenient for receives alarm information at any time, can in time carry out the fault repair, shortens the fault handling time, makes the circuit breaker have more the practicality.
When the circuit breaker is tripped due to a fault, the remote communication unit 131 is triggered to send an alarm signal to the monitoring platform and the user handheld terminal, and after the user receives information, the fault condition of the circuit breaker can be judged according to the received data, so that remote monitoring and management can be performed, and the functional requirements of the user can be met.
It should be noted that the power module 140 includes a self-generated power source. The self-generating power supply can provide power for the circuit breaker by utilizing current in the loop, and the power supply does not need to be additionally arranged, so that electric energy can be better utilized, and more energy is saved.
As shown in fig. 2, according to some embodiments of the present invention, the remote communication unit 131 includes an RS485 communication interface 1311 and a WIFI communication interface 1312. When the circuit breaker breaks down and trips, line fault alarm information can be timely sent to a monitoring platform and a user handheld terminal through the RS485 communication interface 1311 and the WIFI communication interface 1312, remote alarm indication is achieved, instantaneity is high, fault processing time is effectively shortened, the RS485 communication interface is arranged to be in communication with an upper computer, the four-remote function can be achieved, detailed data such as phase sequence, reasons and tripping time of tripping caused by the fact that the tripping is conducted are recorded and inquired, and operation and maintenance cost is effectively reduced.
It should be noted that the remote communication unit 131 may also adopt other wireless communication modes such as a bluetooth communication interface and an optical fiber communication interface, and the user-held terminal may be a mobile phone, a tablet computer, and other terminals with wireless functions.
Furthermore, the fault tripping remote indicating device 100 can be further provided with a USB external interface, which can perform data interaction in real time, and the remote communication unit 131 and the USB external interface are provided, which can realize remote and local communication, and timely adjust the overcurrent protection value, the residual current action value and the protection action time, thereby effectively reducing the operation and maintenance cost, shortening the fault processing time and improving the reliability of power utilization.
As shown in fig. 2 and 3, according to the utility model discloses a some embodiments, still include human-computer interaction module 150, human-computer interaction module 150 is connected with host system 120, and human-computer interaction module 150 includes operating panel 160, and operating panel 160 is provided with status display area 161, and status display area 161 includes liquid crystal chinese display screen 1611 and status indicator 1612, and status display area 161 is used for showing the running state and the running parameter of circuit breaker. Make the circuit breaker more have the visualization through setting up human-computer interaction module 150, operating panel 160 is provided with status display area 161, status display area 161 includes liquid crystal chinese display 1611 and status indicator 1612, liquid crystal chinese display 1611 shows various operating parameters of circuit breaker, through setting up status indicator 1612, can indicate the running state of circuit breaker, after taking place the outage trip, status display area 161 shows fault information in real time, the user can see detailed feedback information, confirm the reason that arouses the trip, be convenient for carry out the maintenance of faults.
Specifically, the action current and action time value of each protection function of the circuit breaker can be preset by a keyboard and an encoder, the state display area 161 can display various characteristic parameters such as temperature, current, voltage, power factor, active power, reactive power and the like in real time, when various faults occur in the main loop, such as fault current and voltage reaching or exceeding set values, the main control module 120 outputs tripping action signals after operation judgment and comparison, the circuit breaker trips to cut off a fault circuit, data storage such as fault parameters and types is carried out through the storage unit 121, the main control module 120 has self-diagnosis capability, is more suitable for a low-voltage distribution and power utilization information network system, users can judge the reason of the fault of the circuit breaker through real-time display of fault information, the maintenance is convenient, the liquid crystal Chinese display screen 1611 displays various operation parameters of the circuit breaker, and through setting a communication indicator lamp, a closing indicator lamp and a fault indicator lamp, the indication circuit breaker is in different running states, the human-computer interface is friendly, and the operation is convenient.
As shown in fig. 3, according to some embodiments of the present invention, the operation panel 160 is further provided with an opening/closing indication window 162, the opening/closing indication window 162 displays red closing status, and the opening/closing indication window 162 displays green closing status. The operation panel 160 is provided with the switching-on/off indication window 162, which can more intuitively play a role in prompting, the switching-on/off indication window 162 displays red to indicate a switching-on state through normal power transmission and switching-on of the circuit breaker, and when a power-off tripping condition occurs, the switching-on/off indication window 162 displays green to indicate a switching-off state.
According to some embodiments of the present invention, the operation panel 160 is further provided with a key operation area 163, and the key operation area 163 is provided with a state operation button 1631, a function setting button 1632, and a power setting button 1633. Through setting up key operation district 163 at operating panel 160, key operation is simple and convenient, and key operation district 163 is provided with state operating button 1631, function setting button 1632 and power setting button 1633, is convenient for close a floodgate, separating brake operation and functional test, makes things convenient for daily use.
The data of rated current, protection switching, current fixed value, time limit characteristic and the like of the circuit breaker are further adjusted by controlling the key operation area 163 of the operation panel 160, so that the intelligent protection effect of residual current is achieved, once a plurality of sampling points are found to continuously exceed a specified threshold, a system is immediately enabled to send out a tripping signal, the circuit breaker is enabled to trip, and damage to system equipment caused by overlarge short-circuit current is prevented.
According to some embodiments of the utility model, power setting button 1633 is provided with earth leakage protection and keeps off the position, and earth leakage protection closes and keeps off the position and the electric leakage monitoring keeps off the position. Set up button 1633 with the power and switch to earth leakage protection and keep off the position, the whole functions of sign circuit breaker are opened, switch to earth leakage protection and close the whole functions of fender position circuit breaker and close, when carrying out emergent maintenance, will keep off the position and switch to earth leakage monitoring and keep off the position, the circuit breaker only monitors the electric leakage function, does not possess earth leakage protection tripping operation function, convenient operation, the daily use of being convenient for.
As shown in fig. 3, according to some embodiments of the present invention, the operation panel 160 is provided with a manual opening and closing screw hole 164. Through setting up manual divide-shut brake screw 164, can carry out installation and debugging to the circuit breaker, the manual divide-shut brake operation that carries on makes the circuit breaker have more the practicality.
Specifically, the manual opening and closing screw hole 164 is formed in the operation panel 160, and before installation, an internal hexagonal wrench is inserted into the manual opening and closing screw hole 164 and rotates counterclockwise until the opening and closing indication window 162 displays green; when the switching-on motor is damaged, the power supply setting button 1633 is switched to the leakage protection off-position by manual switching-on, a configured hexagonal socket head cap screw wrench is inserted into the manual switching-on and switching-off screw hole 164, the wrench is rotated in the counterclockwise direction until switching-on, and the switching-on and switching-off indication window 162 indicates red to indicate switching-on; the breaker is switched off under the non-electrified state, a hexagon socket head cap screw wrench is inserted into the manual switching-off and switching-on screw hole 164, the wrench is rotated in the anticlockwise direction until the switching-off and switching-on indication is green and the switching-off is indicated.
As shown in fig. 4, according to some embodiments of the present invention, the device further includes a potentiometer 170, and the potentiometer 170 is connected to the main control module 120. The magnitude of the tripping current can be adjusted by setting the potentiometer 170, and the potentiometer 170 is connected with the main control module 120, so that the current parameter is more accurate and reliable, and the current breaking precision of the circuit breaker is improved.
According to some embodiments of the present invention, further comprising a maintenance interface 180 and a driving interface 190, the maintenance interface 180 and the driving interface 190 are respectively connected with the main control module 120. Maintenance interface 180 is arranged to facilitate maintenance and debugging of the equipment, when the main loop breaks down, main control module 120 judges and compares through operation, and outputs a tripping signal through driving interface 190, so that the breaker can cut off the fault circuit in time, and normal operation of the system is guaranteed.
An embodiment of the second aspect of the present invention provides a circuit breaker, including the fault tripping remote indication device 100 of the above first aspect.
As shown in fig. 1, the circuit breaker includes the fault trip remote indicating device 100 of the first aspect, the fault trip remote indicating device 100 includes a signal acquisition module 110, a main control module 120, an alarm module 130 and a power module 140, the power module 140 is respectively connected to the signal acquisition module 110, the main control module 120 and the alarm module 130, the power module 140 provides working power to ensure a normal working state, the signal acquisition module 110 acquires current signals in a loop and conditions and amplifies the current signals, the main control module 120 is connected to the signal acquisition module 110, the main control module 120 receives the current signals from the signal acquisition module 110 and performs operation and judgment, the main control module 120 includes a storage unit 121, the storage unit 121 stores fault data, the main control module 120 has self-diagnosis capability, the alarm module 130 is connected to the main control module 120, the alarm module 130 includes a remote communication unit 131, when the circuit breaks down, can send alarm signal to inherent monitor platform and the handheld terminal of binding the user through remote communication unit 131, remind the user line trouble condition, the user of being convenient for receives alarm information at any time, can in time carry out the breakdown maintenance, shortens the fault handling time, makes the circuit breaker have more the practicality.
Specifically, as shown in fig. 3 and 5, during the use of the circuit breaker, the closing operation is as follows: after the circuit breaker is powered on, a power supply setting button 1633 is pressed to the earth leakage protection gear, the state display area 161 displays the running state and the running parameters, the electric operating mechanism starts to switch on, after 20s-60s, the circuit breaker is automatically closed, and the switching-on and switching-off indication window 162 indicates red to indicate switching-on; when the breaker is closed and normally operates, the external wiring terminals 3 and 5 are in short circuit, the breaker trips, the breaker automatically closes again when the external wiring terminals 3 and 4 are in short circuit, and red is displayed in the opening and closing indication window 162; the breaker opening operation is as follows: when the circuit breaker is in an electrified and closed state, the circuit breaker is tripped by pressing a test button in the state operation buttons 1631, and the switching-on and switching-off indication window 162 indicates green to indicate switching-off; when the breaker is in emergency maintenance, if leakage tripping occurs, the power supply setting button 1633 can be switched to a leakage monitoring gear, and then the breaker only performs leakage monitoring and cannot trip due to leakage faults.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art.
Claims (10)
1. The utility model provides a long-range indicating device of fault tripping, is applied to circuit breaker which characterized in that includes:
the signal acquisition module is used for acquiring and conditioning current signals in the loop;
the main control module is connected with the signal acquisition module and comprises a storage unit, and the storage unit is used for storing fault data;
the alarm module is connected with the main control module and comprises a remote communication unit, and the remote communication unit is used for transmitting alarm signals to the monitoring platform and the handheld terminal of the user;
the power module is respectively connected with the signal acquisition module, the main control module and the alarm module, and the power module is used for providing a working power supply.
2. The remote fault trip indicating device of claim 1, wherein the remote communication unit comprises an RS485 communication interface and a WIFI communication interface.
3. The remote fault trip indicating device according to claim 1, further comprising a human-computer interaction module, wherein the human-computer interaction module is connected with the main control module, the human-computer interaction module comprises an operation panel, the operation panel is provided with a state display area, the state display area comprises a liquid crystal Chinese display screen and a state indicator lamp, and the state display area is used for displaying the operating state and the operating parameters of the circuit breaker.
4. The remote fault trip indicating device according to claim 3, wherein the operating panel is further provided with an opening and closing indicating window, the opening and closing indicating window displays that red is in an on state, and the opening and closing indicating window displays that green is in an off state.
5. The remote indicating device for fault release according to claim 3, wherein the operation panel is further provided with a key operation area, and the key operation area is provided with a status operation button, a function setting button and a power setting button.
6. The remote fault trip indicating device of claim 5, wherein the power setting button is provided with a leakage protection gear, a leakage protection off gear and a leakage monitoring gear.
7. The remote fault trip indicating device according to claim 3, wherein the operating panel is provided with a manual opening and closing screw hole.
8. The remote fault trip indicating device of claim 1, further comprising a potentiometer, wherein the potentiometer is connected to the master control module.
9. The remote indicating device for fault tripping according to claim 1, further comprising a maintenance interface and a driving interface, wherein the maintenance interface and the driving interface are respectively connected to the main control module.
10. A circuit breaker, characterized in that it comprises a fault trip remote indication device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120289206.6U CN214585872U (en) | 2021-02-01 | 2021-02-01 | Fault tripping remote indicating device and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120289206.6U CN214585872U (en) | 2021-02-01 | 2021-02-01 | Fault tripping remote indicating device and circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN214585872U true CN214585872U (en) | 2021-11-02 |
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| CN202120289206.6U Active CN214585872U (en) | 2021-02-01 | 2021-02-01 | Fault tripping remote indicating device and circuit breaker |
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- 2021-02-01 CN CN202120289206.6U patent/CN214585872U/en active Active
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