CN216848054U - Breaker opening and closing detection device and breaker - Google Patents
Breaker opening and closing detection device and breaker Download PDFInfo
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- CN216848054U CN216848054U CN202121354494.5U CN202121354494U CN216848054U CN 216848054 U CN216848054 U CN 216848054U CN 202121354494 U CN202121354494 U CN 202121354494U CN 216848054 U CN216848054 U CN 216848054U
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Abstract
The utility model discloses a breaker divide-shut brake detection device and breaker, including controller and light-operated component, wherein, light-operated component includes light emitting circuit and light receiving circuit, and when the movable rod was in the first position, light emitting circuit was in the off-state for the light path of light receiving circuit; when the movable rod is at the second position, the light emitting circuit is in a conducting state relative to the light path of the light receiving circuit; the output end of the controller is connected with the input end of the light emitting circuit, the input end of the controller is connected with the output end of the light receiving circuit, and the controller is used for sending a pulse driving signal with preset frequency to the light emitting circuit, receiving a detection signal fed back by the light receiving circuit, and generating a breaker opening and closing detection result according to the detection signal. When this technical scheme detects circuit breaker divide-shut brake, through the pulse drive signal of transmission with receive preset frequency, effectively prevented the influence of other interfering signal to the result, the electric spark that produces when having solved the divide-shut brake makes detection device cause the erroneous judgement problem easily.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to circuit breaker divide-shut brake detection device and circuit breaker.
Background
After the circuit breaker is used for a long time, due to factors such as environmental influence, lubricating performance reduction and self aging, the stored energy of a spring is reduced, mechanical movement resistance is increased, and when closing is possibly caused, a switch connecting rod cannot cross a dead point.
The existing device or structure for detecting the opening and closing of the circuit breaker usually adopts a micro switch as a signal acquisition element, and the opening and closing state of the circuit breaker cannot be timely and accurately reflected due to the problem of mechanical strain, deformation and failure of a spring piece of the micro switch; a few circuit breakers adopt a photoelectric switch as a signal acquisition element, but the circuit breaker has spark generation when the circuit breaker is switched on with load, and an arc discharge phenomenon exists between contacts when the circuit breaker is switched off, so that arc light can be emitted, and the erroneous judgment of the photoelectric switch is easily caused.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a circuit breaker divide-shut brake detection device and circuit breaker to electric spark makes detection device cause the erroneous judgement problem easily when solving the detection circuit breaker divide-shut brake.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the embodiment of the utility model provides a circuit breaker divide-shut brake detection device is applied to the movable rod of circuit breaker, the movable rod is in the first position when the circuit breaker carries out separating brake or combined floodgate, and be in the second position when the circuit breaker carries out combined floodgate or separating brake, the device that circuit breaker divide-shut brake detected includes: a controller and a light control assembly, wherein,
the light control assembly comprises a light emitting circuit and a light receiving circuit, and when the movable rod is in the first position, the light emitting circuit is in a cut-off state relative to the light path of the light receiving circuit; when the movable rod is at the second position, the light emitting circuit is in a conducting state relative to the light path of the light receiving circuit;
the output end of the controller is connected with the input end of the light emitting circuit, the input end of the controller is connected with the output end of the light receiving circuit, and the controller is used for sending a pulse driving signal with a preset frequency to the light emitting circuit, receiving a detection signal fed back by the light receiving circuit, and generating a circuit breaker opening and closing detection result according to the detection signal.
Optionally, the circuit breaker switching-on/off detection device further comprises a judgment module, a first input end of the judgment module is connected with an input end of the light emitting circuit, a second input end of the judgment module is connected with the light receiving circuit, an output end of the judgment module is connected with the controller, and the judgment module compares a detection signal fed back by the light receiving circuit with a pulse driving signal with a preset frequency to generate a judgment signal and sends the judgment signal to the controller.
Optionally, the judging module is a comparator.
Optionally, the circuit breaker opening and closing detection device further includes: and the alarm module is connected with the controller, and the controller is also used for generating an alarm control signal according to the received judgment signal and controlling the alarm module to alarm through the alarm control signal.
Optionally, the circuit breaker opening and closing detection device further includes: and the first end of the communication module is connected with the controller, the second end of the communication module is connected with the terminal equipment through the antenna, and the controller sends the opening and closing detection result of the circuit breaker to the terminal equipment through the communication module.
Optionally, the light emitting circuit includes a first resistor, a second resistor, a light emitting diode, and a controlled switch, where a first end of the first resistor is connected to the controller, and a second end of the first resistor is connected to a control end of the controlled switch; the first end of the second resistor is connected with a power supply VCC, and the second end of the second resistor is connected with the control end of the controlled switch; the anode of the light-emitting diode is connected with a power supply VCC, and the cathode of the light-emitting diode is connected with a first output end of the controlled switch; the second output terminal of the controlled switch is connected to the ground GND.
Optionally, the light receiving circuit includes a third resistor, a fourth resistor, a fifth resistor, and a phototriode, where a first end of the third resistor is connected to the controller, and a second end of the third resistor is connected to a collector of the phototriode; the first end of the fourth resistor is connected with a power supply VCC, and the second end of the fourth resistor is connected with the collector electrode of the phototriode; and the base electrode of the photoelectric triode is grounded GND through a fifth resistor.
The embodiment of the utility model provides a still provide a circuit breaker, include: a movable rod and a breaker opening and closing detection device provided by another embodiment of the utility model, wherein,
the movable rod is located at a first position when the breaker is opened or closed and located at a second position when the breaker is closed or opened.
Optionally, the circuit breaker further includes: set up in inside baffle and the drive arrangement of circuit breaker, the activity groove has been seted up on the baffle, the movable rod activity sets up in the activity inslot, the bottom and the drive arrangement of movable rod are connected, drive arrangement with the controller is connected for the drive movable rod carries out the position and switches.
Optionally, the circuit breaker still includes the spring, the top of movable rod is passed through the spring and is connected with the baffle, the movable rod is in when the circuit breaker carries out the separating brake or closes a floodgate, drive the spring and take place elastic deformation.
The utility model discloses technical scheme has following advantage:
1. the embodiment of the utility model provides a circuit breaker divide-shut brake detection device is applied to the movable rod of circuit breaker, and the movable rod is in the first position when the circuit breaker carries out separating brake or combined floodgate to be in the second position when the circuit breaker carries out combined floodgate or separating brake, the device that circuit breaker divide-shut brake detected includes: the light control assembly comprises a light emitting circuit and a light receiving circuit, and when the movable rod is at the first position, the light emitting circuit is in a cut-off state relative to the light path of the light receiving circuit; when the movable rod is at the second position, the light emitting circuit is in a conducting state relative to the light path of the light receiving circuit; the output end of the controller is connected with the input end of the light emitting circuit, the input end of the controller is connected with the output end of the light receiving circuit, and the controller is used for sending a pulse driving signal with preset frequency to the light emitting circuit, receiving a detection signal fed back by the light receiving circuit, and generating a breaker opening and closing detection result according to the detection signal. When the technical scheme is used for detecting the opening and closing of the circuit breaker, the pulse driving signal with the preset frequency is transmitted and received, so that the influence of other interference signals on a result is effectively prevented, and the problem that the detection device is easy to cause misjudgment due to sparks and arc light generated during opening and closing is solved; the scheme does not depend on the cooperation of other signals, and can intuitively reflect the physical opening and closing state of the circuit breaker; the structure of the original circuit breaker is not required to be changed; the detection is carried out by the light control principle, and the detection result is safe and reliable.
2. The embodiment of the utility model provides a circuit breaker, set up the circuit breaker divide-shut brake detection device described in another embodiment of the utility model on this circuit breaker, when detecting circuit breaker divide-shut brake, through transmitting and receiving the pulse drive signal of preset frequency, can prevent effectively that other interfering signal from to the influence of result to the spark and the electric arc light that produce when having solved the divide-shut brake easily make detection device cause the erroneous judgement problem; the scheme does not depend on the cooperation of other signals, and can intuitively reflect the physical opening and closing state of the circuit breaker; the structure of the original circuit breaker is not required to be changed; the detection is carried out through the light-operated principle, the detection result is safe and reliable, the assembly installation is simple and convenient, and the opening and closing self-checking function is realized through the opening and closing detection device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a circuit breaker opening and closing detection device in an embodiment of the present invention;
fig. 2 is a schematic structural view of the movable rod in the first position according to the embodiment of the present invention;
fig. 3 is a schematic structural view of the movable rod in the second position according to the embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a light control module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention;
fig. 6 is a schematic view of a partial structure of a circuit breaker according to an embodiment of the present invention.
In the figure:
the device comprises a controller 1, a light emitting circuit 2, a light receiving circuit 3, a judgment module 4, a communication module 5, an alarm module 6, a movable rod 7, a light control assembly 8, a spring 9, an extension plate 10, a partition plate 11, a movable groove 12, a fixed plate 13, a baffle 14 and a breaker opening and closing detection device 15.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
In this embodiment, a breaker opening and closing detection device is provided, as shown in fig. 1 to 3, and is applied to a movable rod 7 of a breaker, where the movable rod 7 is located at a first position when the breaker is opened or closed, and is located at a second position when the breaker is opened or closed, and the device for breaker opening and closing detection includes: the controller 1 and the light control assembly 8, wherein the light control assembly 8 comprises a light emitting circuit 2 and a light receiving circuit 3, and when the movable rod 7 is at the first position, the light emitting circuit 2 is in a cut-off state relative to the light path of the light receiving circuit 3; when the movable lever 7 is in the second position, the light emitting circuit 2 is in a conductive state with respect to the optical path of the light receiving circuit 3; the output end of the controller 1 is connected with the input end of the light emitting circuit 2, the input end of the controller is connected with the output end of the light receiving circuit 3, and the controller is used for sending a pulse driving signal with preset frequency to the light emitting circuit 2, receiving a detection signal fed back by the light receiving circuit 3, and generating a breaker opening and closing detection result according to the detection signal.
Specifically, the movable rod 7 has two position states during switching on and switching off, the light control assembly 8 can be arranged at two side positions of the movable rod 7 in the switching on state and can also be arranged at two side positions of the movable rod 7 in the switching off state, and when the movable rod 7 is switched on, the position changes and the shielding state of the light path correspondingly changes, so that the receiving of the light signal by the light receiving circuit 3 is influenced, and the fed back detection signal also correspondingly changes.
Specifically, because the pulse drive signal that controller 1 launched to light emitting circuit 2 is the frequency that has set for in advance, light receiving circuit 3 feeds back corresponding detected signal, the circuit breaker has the spark to produce when the on-load combined floodgate, and can have the arc phenomenon of drawing between the contact when the separating brake, can send the arc light, spark and arc light produce interference phenomenon easily, the pulse drive signal of preset frequency is taken to this scheme, whether unanimous can accurately judge the divide-shut brake state through the frequency of comparison detected signal and pulse drive signal, anti-jamming effect has been played, even spark and arc light have appeared, also can not cause the influence to the testing result. The breaker opening and closing detection device provided by the embodiment of the utility model does not depend on the cooperation of other signals, and can visually reflect the physical opening and closing state of the breaker; the structure of the original circuit breaker is not required to be changed; the detection is carried out through the light control principle, the detection result is safe and reliable, and meanwhile, the assembly is simple and convenient to install.
Specifically, the controller 1 here may be the controller 1 in the circuit breaker body, and may also be a chip that can play a control role to achieve the control purpose, such as a single chip microcomputer, a PLC controller, and the like.
In an embodiment, as shown in fig. 1, the above-mentioned opening/closing detection device for a circuit breaker further includes a determination module 4, a first input end of the determination module 4 is connected to the input end of the light emitting circuit 2, a second input end of the determination module 4 is connected to the light receiving circuit 3, an output end of the determination module is connected to the controller 1, and the determination module 4 compares a detection signal fed back by the light receiving circuit 3 with a pulse driving signal with a preset frequency to generate a determination signal and send the determination signal to the controller 1.
Specifically, when the movable rod 7 cuts off the light path, the light receiving circuit 3 cannot receive the light signal of the light emitting circuit 2, and the light receiving circuit 3 continuously outputs a stable low level signal to indicate the state of the circuit breaker; when the movable rod 7 does not cut off the light path, the light receiving circuit 3 receives the light signal emitted by the light emitting circuit 2 at the preset frequency and then feeds back a detection signal with the corresponding frequency; when receiving a detection signal fed back by the light receiving circuit 3, the judgment module 4 compares the detection signal with a pulse driving signal with a preset frequency, outputs a judgment signal and sends the judgment signal to the controller 1; when the detection signal is consistent with the pulse driving signal, the light path is in a conducting state, and the movable rod 7 is in a position which does not shield the light path; when the detection signal is inconsistent with the pulse driving signal, it indicates that the light path is in a disconnected state, and the movable rod 7 is in a position for shielding the light path.
In an embodiment, the determining module 4 is a comparator. Specifically, the judging module 4 may also be other types of comparison circuits or other electronic devices capable of comparing signals in the prior art, and the present invention is not limited thereto.
In an embodiment, the above breaker opening and closing detection device further includes: and the alarm module 6 is connected with the controller 1, and the controller 1 is further used for generating an alarm control signal according to the received judgment signal and controlling the alarm module 6 to alarm through the alarm control signal. Specifically, the state of the circuit breaker can be preset, and when the received judgment signal is not in accordance with the preset state, the controller 1 generates an alarm control signal to control the alarm module 6 to alarm; the alarm module 6 may be a buzzer, a loudspeaker, or other devices capable of generating an alarm sound, but the present invention is not limited thereto.
In an embodiment, the above breaker opening and closing detection device further includes: the first end of the communication module 5 is connected with the controller 1, the second end of the communication module 5 is connected with the terminal equipment through an antenna, and the controller 1 sends the breaker opening and closing detection result to the terminal equipment through the communication module 5. Specifically, the controller 1 transmits the breaker opening and closing detection result to the user terminal through the communication module 5, communication between the user terminal and the breaker is established, the breaker can be monitored in a remote mode, and the state of the breaker can be observed in real time.
In an embodiment, as shown in fig. 4, the light emitting circuit 2 includes a first resistor, a second resistor, a light emitting diode, and a controlled switch, wherein a first end of the first resistor is connected to the controller 1, and a second end of the first resistor is connected to a control end of the controlled switch; the first end of the second resistor is connected with a power supply VCC, and the second end of the second resistor is connected with the control end of the controlled switch; the anode of the light emitting diode is connected with a power supply VCC, and the cathode of the light emitting diode is connected with the first output end of the controlled switch; the second output terminal of the controlled switch is connected to ground GND. Specifically, the controller 1 transmits a pulse driving signal with a preset frequency to the light emitting circuit 2, and drives the light emitting diode to emit light with the preset frequency.
In an embodiment, as shown in fig. 4, the light receiving circuit 3 includes a third resistor, a fourth resistor, a fifth resistor, and a phototransistor, wherein a first end of the third resistor is connected to the controller 1, and a second end of the third resistor is connected to a collector of the phototransistor; the first end of the fourth resistor is connected with a power supply VCC, and the second end of the fourth resistor is connected with the collector of the phototriode; and the base electrode of the photoelectric triode is grounded GND through a fifth resistor. Specifically, when the movable rod 7 is located at a position where the optical path is not blocked, the light receiving circuit 3 receives an optical signal with a specific frequency emitted by the light emitting diode through the phototriode, and converts the optical signal into an electrical signal with the specific frequency for feedback.
The embodiment of the utility model provides a still provide a circuit breaker, as shown in fig. 5, this circuit breaker includes: a movable rod 7 and a breaker opening and closing detection device 15 provided by another embodiment of the utility model, wherein,
the movable rod 7 is located at a first position when the circuit breaker is opened or closed and at a second position when the circuit breaker is closed or opened.
Specifically, the movable rod 7 is located at different positions when the breaker is opened or closed, the light control assembly 8 can be arranged at a first position or a second position, and after the movable rod 7 completes position switching, the movable rod can play a role in shielding the light path of the light control assembly 8 at one of the positions, so that the light signal is blocked from being transmitted through shielding the light path, and the light control assembly 8 feeds back different information to indicate the opening or closing state of the breaker.
Specifically, when the opening and closing of the circuit breaker are detected, the influence of other interference signals on a result can be effectively prevented by transmitting and receiving pulse driving signals with preset frequency, so that the problem that misjudgment is easily caused by a detection device due to sparks and arc light generated during opening and closing is solved; the scheme does not depend on the cooperation of other signals, and can intuitively reflect the physical opening and closing state of the circuit breaker; the structure of the original circuit breaker is not required to be changed; the automatic opening and closing detection device has the advantages that the automatic opening and closing detection device is used for detecting through the light-operated principle, the detection result is safe and reliable, the assembly installation is simple and convenient, and the opening and closing self-detection function is realized through the opening and closing detection device.
In an embodiment, as shown in fig. 6, the circuit breaker further includes: the circuit breaker comprises a partition plate 11 and a driving device (not shown in fig. 6) which are arranged inside the circuit breaker, wherein a movable groove 12 is formed in the partition plate 11, a movable rod 7 is movably arranged in the movable groove 12, the bottom of the movable rod 7 is connected with the driving device, and the driving device is connected with the controller 1 and used for driving the movable rod 7 to perform position switching. Specifically, when the circuit breaker is opened or closed, the controller 1 controls the driving device to drive the movable rod 7 to switch in position, so that the opening and closing state of the circuit breaker can be visually indicated, and the light control assembly 8 can be shielded by driving the movable rod 7 to switch in position, so that the light control assembly 8 feeds back detection information.
In an embodiment, the circuit breaker further includes a spring 9, a top end of the movable rod 7 is connected to the partition board through the spring 9, and the movable rod 7 drives the spring 9 to elastically deform when the circuit breaker is opened or closed. Specifically, the situation that the movable rod 7 cannot reach an expected position when switching positions to influence shielding of a light path when switching is carried out after switching-off along with aging of devices in the using process and switching-on of the devices is avoided, so that misjudgment is generated, the spring 9 can assist the movable rod 7 to act, and the service life of the device is prolonged.
In an embodiment, the circuit breaker further includes a detection button, the detection button is connected to the controller 1, and the detection button includes a timing detection button and a real-time detection button for selecting a detection mode. Specifically, the timing detection button and the real-time detection button can enable the controller 1 to send pulse driving signals with preset frequency in a timing mode or in a real-time mode, real-time detection or timing detection is conducted on the circuit breaker according to the requirements of users, the timing detection and the real-time detection can be achieved through the timer and the trigger device, the circuit breaker timing detection and real-time detection device belongs to the application of the prior art, and detailed description is omitted.
In one embodiment, an extension plate 10 is disposed on the top of the movable rod 7, and a hook is disposed at an end of the extension plate 10 connected to the spring 9 and fixedly connected to one end of the spring 9. Specifically, through setting up extension plate 10, increased the distance of movable rod 7 top and spring 9 link, when movable rod 7 carries out the position switch, spring 9's activity angle reduces, has alleviated because of the big, the big easy-to-break problem of junction that leads to of pulling force of activity angle.
In an embodiment, the circuit breaker further includes a fixing plate 13, the fixing plate 13 is fixedly connected to the partition, a fixing ring is disposed at one end of the fixing plate 13, one end of the spring 9 is connected to the movable rod 7, and the other end of the spring is connected to the fixing ring. Specifically, through setting up couple and solid fixed ring, can dismantle between messenger's spring 9 and the circuit breaker and be connected, can carry out periodic replacement to spring 9, reduced the operation degree of difficulty, be convenient for periodic maintenance.
In one embodiment, a baffle plate 14 is fixed on the fixed plate at a position opposite to the movable rod 7. Specifically, for limiting the position of the movable rod 7, a buffer pad may be further disposed at the baffle 14, so as to buffer and protect the movable rod 7.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. The utility model provides a circuit breaker divide-shut brake detection device, is applied to the movable rod of circuit breaker, the movable rod is in the first position when the circuit breaker carries out separating brake or combined floodgate, and the circuit breaker is in the second position when carrying out combined floodgate or separating brake, its characterized in that, the device that circuit breaker divide-shut brake detected includes: a controller and a light control assembly, wherein,
the light control assembly comprises a light emitting circuit and a light receiving circuit, and when the movable rod is in the first position, the light emitting circuit is in a cut-off state relative to the light path of the light receiving circuit; when the movable rod is at the second position, the light emitting circuit is in a conducting state relative to the light path of the light receiving circuit;
the output end of the controller is connected with the input end of the light emitting circuit, the input end of the controller is connected with the output end of the light receiving circuit, and the controller is used for sending a pulse driving signal with a preset frequency to the light emitting circuit, receiving a detection signal fed back by the light receiving circuit, and generating a circuit breaker opening and closing detection result according to the detection signal.
2. The circuit breaker opening and closing detection device according to claim 1, further comprising a judgment module, wherein a first input end of the judgment module is connected with an input end of the light emitting circuit, a second input end of the judgment module is connected with the light receiving circuit, an output end of the judgment module is connected with the controller, and the judgment module compares a detection signal fed back by the light receiving circuit with a pulse driving signal with a preset frequency to generate a judgment signal and sends the judgment signal to the controller.
3. The circuit breaker opening and closing detection device according to claim 2, wherein the judgment module is a comparator.
4. The circuit breaker opening and closing detection device according to claim 2, further comprising: and the alarm module is connected with the controller, and the controller is also used for generating an alarm control signal according to the received judgment signal and controlling the alarm module to alarm through the alarm control signal.
5. The circuit breaker opening and closing detection device according to claim 1, further comprising: and the first end of the communication module is connected with the controller, the second end of the communication module is connected with the terminal equipment through the antenna, and the controller sends the opening and closing detection result of the circuit breaker to the terminal equipment through the communication module.
6. The circuit breaker opening and closing detection device according to claim 1, wherein the light emitting circuit comprises a first resistor, a second resistor, a light emitting diode and a controlled switch, wherein a first end of the first resistor is connected with the controller, and a second end of the first resistor is connected with a control end of the controlled switch; the first end of the second resistor is connected with a power supply VCC, and the second end of the second resistor is connected with the control end of the controlled switch; the anode of the light emitting diode is connected with a power supply VCC, and the cathode of the light emitting diode is connected with the first output end of the controlled switch; the second output terminal of the controlled switch is connected to the ground GND.
7. The circuit breaker opening and closing detection device according to claim 1, wherein the light receiving circuit comprises a third resistor, a fourth resistor, a fifth resistor and a phototriode, wherein a first end of the third resistor is connected with the controller, and a second end of the third resistor is connected with a collector of the phototriode; the first end of the fourth resistor is connected with a power supply VCC, and the second end of the fourth resistor is connected with the collector electrode of the phototriode; and the base electrode of the photoelectric triode is grounded GND through a fifth resistor.
8. A circuit breaker, comprising: a movable lever, and the circuit breaker opening and closing detection device according to any one of claims 1 to 7,
the movable rod is located at a first position when the breaker is opened or closed and located at a second position when the breaker is closed or opened.
9. The circuit breaker of claim 8, further comprising: set up in inside baffle and the drive arrangement of circuit breaker, the activity groove has been seted up on the baffle, the movable rod activity sets up in the activity inslot, the bottom and the drive arrangement of movable rod are connected, drive arrangement with the controller is connected for the drive movable rod carries out the position and switches.
10. The circuit breaker according to claim 9, further comprising a spring, wherein the top end of the movable rod is connected to the partition plate through the spring, and the movable rod drives the spring to elastically deform when the circuit breaker is opened or closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121354494.5U CN216848054U (en) | 2021-06-17 | 2021-06-17 | Breaker opening and closing detection device and breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121354494.5U CN216848054U (en) | 2021-06-17 | 2021-06-17 | Breaker opening and closing detection device and breaker |
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| Publication Number | Publication Date |
|---|---|
| CN216848054U true CN216848054U (en) | 2022-06-28 |
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|---|---|---|---|
| CN202121354494.5U Active CN216848054U (en) | 2021-06-17 | 2021-06-17 | Breaker opening and closing detection device and breaker |
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| Country | Link |
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| CN (1) | CN216848054U (en) |
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2021
- 2021-06-17 CN CN202121354494.5U patent/CN216848054U/en active Active
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