CN213581252U - On-line monitoring device of circuit breaker and switch cabinet - Google Patents
On-line monitoring device of circuit breaker and switch cabinet Download PDFInfo
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- CN213581252U CN213581252U CN202022523219.3U CN202022523219U CN213581252U CN 213581252 U CN213581252 U CN 213581252U CN 202022523219 U CN202022523219 U CN 202022523219U CN 213581252 U CN213581252 U CN 213581252U
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Abstract
The utility model discloses an on-line monitoring device and cubical switchboard of circuit breaker. The on-line monitoring device of the circuit breaker comprises the circuit breaker and a current collecting unit, wherein the current collecting unit is integrated on an anti-tripping control panel inside an electrical anti-tripping box, a plurality of external interfaces are arranged on the anti-tripping control panel, and the opening coil current, the closing coil current and the energy storage motor current of the circuit breaker are connected through the external interfaces to form the anti-tripping control panel, and the current collecting unit is electrically connected with the external interfaces for connecting the opening coil current, the closing coil current and the energy storage motor current to collect the opening coil current, the closing coil current and the energy storage motor current of the circuit breaker.
Description
Technical Field
The present disclosure relates to the field of electrical equipment, and in particular, to an online monitoring device for a circuit breaker and a switch cabinet.
Background
The switch cabinet is applied to an electric power system such as a national power grid, and has functions of opening and closing, controlling and protecting electric equipment in the electric power system. The circuit breaker is the most important component in the switch cabinet, and is used for controlling the opening and closing of a line on one hand, and is used for protecting the switch cabinet on the other hand, when a fault occurs, the circuit breaker is automatically started, and a fault part is quickly cut off from a power grid, so that the normal operation of the fault-free part of the power grid is ensured.
The power internet of things is the development direction of a future power system, and the state monitoring and data interaction of the circuit breaker are important parts of the power internet of things. The circuit breaker of the traditional cubical switchboard of making does not generally set up state monitoring device, consequently generally need change traditional cubical switchboard and install corresponding monitoring device, nevertheless because there is complicated electrical connection between each other in each electric part in the cubical switchboard, the function of other parts can all be influenced in the change of any part of cubical switchboard, therefore how to gather the state data of circuit breaker is the problem that industry faced at present.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the traditional switch cabinet is modified and the monitoring device is installed to face the complex modification work in the prior art, the on-line monitoring device of the circuit breaker and the switch cabinet can be rapidly modified and the modification cost is saved.
The present disclosure provides an on-line monitoring device of a circuit breaker, including:
a circuit breaker; and
the current acquisition unit, it is integrated on the inside anti-jump control panel of electrical anti-jump box, be provided with a plurality of external interfaces on the anti-jump control panel, the separating brake coil current of circuit breaker, closing coil current and energy storage motor current pass through the external interface inserts the anti-jump control panel, the current acquisition unit with insert the external interface electricity of separating brake coil current, closing coil current and energy storage motor current is connected to the separating brake coil current of collection circuit breaker, closing coil current and energy storage motor current.
Optionally, the online monitoring device further includes an acquisition module disposed on the anti-trip control board, where the acquisition module includes the current acquisition unit, an analog-to-digital conversion unit electrically connected to the current acquisition unit, a processor electrically connected to the analog-to-digital conversion unit, and a first wireless communication unit electrically connected to the processor;
the acquisition module is still including setting up a plurality of expansion interfaces on the anti-skip control panel, the chassis car motor current of circuit breaker passes through one of them expansion interface inserts the anti-skip control panel, the current acquisition unit is connected with the expansion interface electricity of inserting chassis car motor current to gather chassis car motor current.
Optionally, the current collecting unit includes a plurality of onboard hall current sensors, and each onboard hall current sensor is connected to one of the external interfaces or one of the expansion interfaces connected to the opening coil current, the closing coil current, the energy storage motor current and the chassis motor current to collect the opening coil current, the closing coil current, the energy storage motor current and the chassis motor current.
Optionally, another expansion interface of the plurality of expansion interfaces is electrically connected to an angular displacement sensor for detecting a rotation angle of the main shaft of the circuit breaker;
the expansion interface electrically connected with the angular displacement sensor is electrically connected with the analog-to-digital conversion unit so as to convert the analog voltage signal collected by the angular displacement sensor into a digital signal.
Optionally, a plurality of external interfaces are integrated on the same external interface module, and a plurality of expansion interfaces are integrated on the same expansion interface module.
Optionally, the online monitoring device further includes a wireless receiving module;
the on-line monitoring device further comprises an acquisition module, wherein the acquisition module comprises the current acquisition unit, an analog-digital conversion unit electrically connected with the current acquisition unit, a processor electrically connected with the analog-digital conversion unit and a first wireless communication unit electrically connected with the processor, the processor processes current data after digital-analog conversion to generate a current-time current oscillogram, extracts a characteristic value from the current oscillogram, and sends the current oscillogram and the extracted characteristic value to the wireless receiving module through the first wireless communication unit.
Optionally, the wireless receiving module includes the circuit board, sets up processing unit and second wireless communication unit on the circuit board, second wireless communication unit with first wireless communication unit wireless communication, in order to receive current acquisition unit's electric current-time electric current waveform data and characteristic value data, processing unit keeps waveform data as the COMTRADE format of standard, keeps characteristic value data as the report, and passes through wireless receiving module's net gape is uploaded to backstage diagnostic system with IEC 103's stipulation.
Optionally, the online monitoring device further includes a plurality of wireless temperature sensors for monitoring the breaker contact, the contact arm, the bus lap joint and the cable lap joint, and the wireless receiving module is in wireless communication connection with each wireless temperature sensor to receive the temperature data acquired by each wireless temperature sensor.
Optionally, the online monitoring device further includes an extension module, and the extension module is connected in series with the wireless receiving module;
the expansion module comprises an expansion circuit board, a processor and an analog-digital conversion unit, wherein the processor and the analog-digital conversion unit are arranged on the expansion circuit board;
the extension module is provided with a plurality of interfaces, and three-phase main loop current and grounding switch motor current are accessed to the extension module through the corresponding interfaces;
the on-line monitoring device further comprises a main loop current sensor used for monitoring the three-phase main loop current of the circuit breaker and a grounding switch current sensor used for monitoring the current of the grounding switch motor, the main loop current sensor is connected with an interface connected with the three-phase main loop current, the grounding switch current sensor is connected with an interface connected with the grounding switch motor, and the main loop current sensor and the grounding switch current sensor are located inside or outside the extension module.
Optionally, the expansion module further includes an opening and closing amount detection unit and an opening and closing amount detection interface, where the opening and closing amount detection unit is used to detect the opening and closing times of the circuit breaker, and the opening and closing amount detection interface is electrically connected to a secondary loop of the switch cabinet through a wire to obtain a switching signal;
the opening amount detection unit is arranged inside the expansion module and comprises a voltage division loop and an opening amount sensor, and the expansion module transmits the opening amount detected by the opening amount sensor to the wireless receiving module through serial communication.
Optionally, the main loop current sensor and the grounding switch current sensor are open hall current sensors, and the open sensor is an optical coupling sensor.
The present disclosure additionally provides a switchgear, comprising:
a cabinet body including a circuit breaker chamber and a low-voltage chamber;
an electrical trip prevention box provided in the breaker chamber, and
the circuit breaker of the on-line monitoring device is arranged in the circuit breaker chamber, the current acquisition unit of the on-line monitoring device is arranged in the electrical anti-tripping box, and the wireless receiving module of the on-line monitoring device is arranged in the low-pressure chamber.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the utility model provides an on-line monitoring device of circuit breaker, including circuit breaker and current acquisition unit, the current acquisition unit is integrated on the inside anti-jump control panel that prevents of electrical anti-jump box, be provided with a plurality of external interfaces on the anti-jump control panel, the separating brake coil current of circuit breaker, closing brake coil current and energy storage motor current are prevented jumping the control panel through the external interface access, current acquisition unit with insert separating brake coil current, closing brake coil current and energy storage motor current's external interface electricity is connected, with the separating brake coil current of gathering the circuit breaker, closing brake coil current and energy storage motor current. The current acquisition unit is integrated on the anti-tripping control panel, the switching-off coil current, the switching-on coil current and the energy storage motor current which are originally connected into the anti-tripping control panel for realizing the anti-tripping function are utilized to acquire the relevant state data of the circuit breaker, therefore, under the condition that the original mechanical structure and the original electrical secondary wiring structure of the circuit breaker are not changed, the acquisition of the relevant state data of the circuit breaker is realized under the condition that the original electrical anti-tripping function is kept, and data support is provided for the running state monitoring and the diagnostic analysis of the circuit breaker. The structure of the device is changed little, rapid modification can be realized, and modification cost such as a large amount of manpower and material resources is saved.
The present disclosure additionally provides a switch cabinet, which includes a cabinet body, an electrical anti-trip box disposed in a breaker chamber, and an online monitoring device of the breaker. The cabinet body includes circuit breaker room and low-pressure chamber, and the circuit breaker setting is in the circuit breaker room, and on-line monitoring device's current acquisition unit is integrated in the electrical anti-bouncing box, and on-line monitoring device's wireless receiving module sets up in the low-pressure chamber. Because this cubical switchboard adopts the on-line monitoring device of above-mentioned circuit breaker, for realizing the thing networking, this cubical switchboard can reequip fast, has saved repacking costs such as a large amount of manpowers, material resources.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of a switchgear shown according to an exemplary embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of an anti-jump control board inside the anti-jump box of the present disclosure.
Fig. 3 is a schematic block diagram of an online monitoring device of a circuit breaker according to an exemplary embodiment of the present disclosure.
Detailed Description
For further explanation of the principles and construction of the present disclosure, reference will now be made in detail to the preferred embodiments of the present disclosure, which are illustrated in the accompanying drawings.
As shown in fig. 1, the present disclosure provides a switchgear 100, the switchgear 100 includes a cabinet 10 and an online monitoring device of a circuit breaker disposed in the cabinet, the cabinet 10 includes a circuit breaker chamber 101 and a low voltage chamber 102. The circuit breaker 20 and the electrical trip prevention box 40 are disposed within the circuit breaker chamber 101. The current collection unit is arranged in the electrical anti-jump box 40, and the wireless receiving module 30 is arranged in the low-voltage chamber 102.
Because the current acquisition unit for acquiring the current signal of the circuit breaker is arranged in the electrical tripping-preventing box 40, the current acquisition unit acquires the corresponding current signal by utilizing the opening coil current, the closing coil current and the energy storage motor current of the circuit breaker 20 which is originally connected in the electrical tripping-preventing box 40. Under the condition of keeping the original anti-jumping function of the electrical anti-jumping box 40, the accessed current signal is reused, and the pull wire does not need to be refitted again for monitoring the current signal, so that the refitted manpower and material resources are saved.
In one embodiment, the present disclosure provides an online monitoring device of a circuit breaker, which includes a circuit breaker 20 and an acquisition module. The acquisition module may be an integrated module having a housing.
The collection module comprises a current collection unit, which is integrated on an anti-jump control board 41 inside the electrical anti-jump box 40, as shown in fig. 2 and 3. The current collecting unit may include a switching-off coil current sensor 42, a switching-on coil current sensor 43, and an energy storage motor current sensor 44, which are respectively used for collecting the switching-off coil current, the switching-on coil current, and the energy storage motor current. The opening coil current sensor 42, the closing coil current sensor 43 and the energy storage motor current sensor 44 may be onboard hall current sensors, which are all installed on the anti-tripping control board 41. The anti-jump control board 41 is provided with a plurality of external interfaces 411, as shown in fig. 2, such as external interfaces 1-18. The external interfaces can be integrated on the same interface module. The opening coil current, the closing coil current and the energy storage motor current of the circuit breaker can be conducted to the corresponding external interfaces, for example, to the external interfaces 8, 10 and 14, through conductors such as wires. And each onboard Hall current sensor of the current acquisition unit is respectively connected with an external interface for accessing the current of the opening coil, the current of the closing coil and the current of the energy storage motor. For example, the current acquisition unit comprises three on-board hall current sensors, wherein one of the three on-board hall current sensors is connected with an external interface 8 for accessing the current of the opening coil, the other one of the three on-board hall current sensors is connected with an external interface 10 for accessing the current of the closing coil, and the last one of the three on-board hall current sensors is connected with an external interface 14 for accessing the current of the energy storage motor.
In order to realize the self anti-tripping function of the electrical anti-tripping box 40, the opening coil current, the closing coil current and the energy storage motor current are introduced, so that a current acquisition unit is added on the anti-tripping control panel 41 of the electrical anti-tripping box 40, and the data of the opening coil current, the closing coil current and the energy storage motor current of the circuit breaker can be directly acquired. The original equipment is not required to be greatly modified, a large amount of modification cost is saved, and the power failure time caused by modification is shortened.
Therefore, in the embodiment, the current collection unit is installed on the anti-tripping control board, and the switching-off coil current, the switching-on coil current and the energy storage motor current which are originally connected into the anti-tripping control board for realizing the anti-tripping function are utilized to collect the relevant state data of the circuit breaker, so that under the condition that the original mechanical structure and the original electrical secondary wiring structure of the circuit breaker are not changed, the collection of the relevant state data of the circuit breaker is realized under the condition that the original electrical anti-tripping function is kept, and data support is provided for the running state monitoring and the diagnostic analysis of the circuit breaker. And the structure of the device is changed a little, so that the device can be quickly modified, and a large amount of modification cost such as manpower and material resources can be saved.
The current collection module further includes a plurality of expansion interfaces 412, such as expansion interfaces 19-26, disposed at the anti-bounce control board 41. The expansion interfaces 19-26 may be integrated on the same expansion interface module.
The chassis motor current at the bottom of the circuit breaker is coupled to the anti-bounce control board through one of the expansion interfaces 412, for example, through expansion interfaces 21-22. The current collecting unit further comprises a chassis motor current sensor 45 arranged on the anti-tripping control panel 41, and the chassis motor current sensor 45 is electrically connected with an expansion interface 412 connected with the chassis motor current to collect the chassis motor current. The chassis motor current sensor 45 may be an on-board hall current sensor.
In this embodiment, the acquisition unit includes 4 on-board hall current sensors, and 4 on-board hall current sensors are connected with three external interfaces of access separating brake coil current, closing brake coil current and energy storage motor current and an extension interface of access chassis car motor current respectively to gather separating brake coil current, closing brake coil current, energy storage motor current and chassis car motor current. The Hall current sensor has small volume and higher sensitivity, has no interference to the circuit principle and the circuit of the original electrical anti-tripping control box, and does not influence the electrical anti-tripping function of the control box.
Furthermore, in the description of the present disclosure, it is to be understood that the terms "a" and "an" are a broad meaning and can refer to one or a group, an array, etc. whose actual meaning is to be determined by the context.
Another one of the plurality of expansion interfaces 412 is electrically connected by a conductive wire to an angular displacement sensor 46 that detects the rotational angle of the circuit breaker main shaft. For example, expansion interfaces 23-25 are electrically connected to angular displacement sensor 46. Angular displacement sensor 46 is mounted near the main shaft.
The acquisition module also comprises an analog-to-digital conversion unit electrically connected with the current acquisition unit and a processor electrically connected with the analog-to-digital conversion unit. Namely, the on-board Hall current sensor is electrically connected with the analog-to-digital conversion unit so as to convert the acquired analog current signal into a digital signal. The expansion interface electrically connected with the angular displacement sensor is electrically connected with the analog-digital conversion unit so as to convert the analog voltage signal acquired by the angular displacement sensor into a digital signal. The data of analog-to-digital conversion is input to a processor, and the processor processes the data. For example, the processor records current waveforms of current-time of the switching-on coil and the switching-off coil in the whole switching-on and switching-off processes through a wave recording function, extracts characteristic values such as maximum current of the switching-on coil, minimum current of the switching-on coil, electrified time of the switching-on coil, average action current, maximum operation current, maximum energy storage motor current, chassis vehicle shake-in and shake-out time and maximum chassis vehicle motor current according to the current waveform entering characteristic point extraction algorithm analysis, and stores the extracted characteristic values. For another example, the processor records the main shaft angle waveform of the whole closing process through a wave recording function, and converts the angle waveform into a stroke waveform through an angle-stroke conversion model; and then, carrying out characteristic point extraction algorithm analysis on the stroke waveform, extracting characteristic values for mechanical characteristic analysis, such as total stroke, maximum stroke, minimum stroke, closing speed and the like, and storing the extracted characteristic values.
Further, the on-line monitoring device further comprises a wireless receiving module 30, and the acquisition module further comprises a first wireless communication unit electrically connected with the processor. The current waveform, the stroke waveform, and the characteristic value stored in the acquisition module are transmitted to the wireless receiving module 30 through the first wireless communication unit. The wireless receiving module 30 is disposed in the low voltage chamber, and thus, no secondary wiring is required to be modified.
The wireless receiving module 30 includes a circuit board, a processing unit disposed on the circuit board, and a second wireless communication unit. The second wireless communication unit is in wireless communication with the first wireless communication unit to receive the current waveform, the stroke waveform data and the characteristic value data of the current acquisition unit. The processing unit stores the waveform data into a standard COMTRADE format, stores the characteristic value data into a report, and uploads the report to the background diagnosis system through the internet access of the wireless receiving module 30 according to the IEC103 protocol. And the background diagnosis system monitors, prewarnss faults and analyzes the service life of the circuit breaker according to the data. The wireless receiving module 30 and the background diagnosis system can transmit signals in a wired communication mode. The wireless receiving module 30 is in wireless communication connection with the acquisition module, and aviation plug is not needed, so that primary and secondary isolation is guaranteed, and safety performance is improved.
The on-line monitoring device further comprises a plurality of wireless temperature sensors 61 arranged at the position of the contact of the circuit breaker, the position of the contact arm, the position of the bus lap joint and the position of the cable lap joint, wherein the wireless temperature sensors are respectively used for monitoring the contact of the circuit breaker, the position of the contact arm, the position of the bus lap joint and the position of the cable lap joint, and the wireless receiving module 30 is in wireless communication connection with the wireless temperature sensors 61 to receive temperature data collected by the wireless temperature sensors 61 and monitor the temperature rise condition of the main loop. The wireless receiving module 30 and the wireless temperature sensors 61 can be in communication connection through communication modes such as zigbee communication, 2.4G communication frequency band communication and the like.
The on-line monitoring device further comprises an expansion module 50 arranged in the low-voltage chamber, wherein the expansion module 50 is connected with the wireless receiving module 30 in series, for example, through an SPI (serial peripheral interface). The expansion module 50 includes an expansion circuit board, a processor provided on the expansion circuit board, and an analog-to-digital conversion unit electrically connected to the processor.
The expansion module 50 has a plurality of interfaces through which the three-phase main loop current and the grounding switch motor current are coupled into the expansion module 50.
The on-line monitoring device further comprises a main loop current sensor 51 for monitoring the three-phase main loop current of the circuit breaker and an earthing switch current sensor 52 for monitoring the earthing switch motor current. The main loop current sensor 51 is connected to an interface for receiving a three-phase main loop current, and the earthing switch current sensor 52 is connected to an interface for receiving an earthing switch motor current. The expansion module 50 is an integrated module with a housing, and the main loop current sensor and the ground switch current sensor may be located outside the expansion module 50 and connected to the interface of the expansion module through a connection line, or of course, the main loop current sensor and the ground switch current sensor may also be located inside the expansion module 50.
The expansion module 50 further includes an opening amount detection unit for detecting the opening and closing times of the circuit breaker, and an opening amount detection interface electrically connected to the secondary circuit of the switchgear through a wire to obtain a switching signal.
The open amount detection unit includes a voltage dividing circuit and an open amount sensor, and the open amount sensor is disposed inside the expansion module 50, for example, on an expansion circuit board of the expansion module 50. The expansion module 50 transmits the opening amount detected by the opening amount sensor to the wireless receiving module 30 through serial communication.
The main loop current sensor and the grounding switch current sensor are open Hall current sensors, the open Hall current sensors are connected with corresponding current amounts to acquire three-phase main loop current and the grounding switch motor current, and secondary wiring is not required to be modified. The open-amount sensor is an optical coupling sensor. The opening sensor is arranged on the extension circuit board to realize photoelectric isolation.
The wireless receiving module 30 processes and analyzes data collected by the main loop current sensor and the grounding switch current sensor, generates a current oscillogram, extracts characteristic values of circuit breaker on-off current, arcing time, electric service life, grounding switch motor live time, maximum grounding switch motor current and the like, and uploads the processed oscillogram data and characteristic value data to the background diagnosis system.
The wireless receiving module 30 can be used for analyzing switching value alarm signals such as circuit breaker switching-on/off loop disconnection and the like by receiving the switching-in amount information acquired by the optical coupling sensor.
The above description is only for the purpose of illustrating the preferred embodiments of the present disclosure and is not to be construed as limiting the scope of the present disclosure, but rather is intended to cover all equivalent structural changes made by applying the teachings of the present disclosure to the accompanying drawings.
Claims (12)
1. An on-line monitoring device of a circuit breaker, comprising:
a circuit breaker; and
the current acquisition unit, it is integrated on the inside anti-jump control panel of electrical anti-jump box, be provided with a plurality of external interfaces on the anti-jump control panel, the separating brake coil current of circuit breaker, closing coil current and energy storage motor current pass through the external interface inserts the anti-jump control panel, the current acquisition unit with insert the external interface electricity of separating brake coil current, closing coil current and energy storage motor current is connected to the separating brake coil current of collection circuit breaker, closing coil current and energy storage motor current.
2. The on-line monitoring device of the circuit breaker according to claim 1, further comprising an acquisition module disposed on the anti-trip control board, wherein the acquisition module comprises the current acquisition unit, an analog-to-digital conversion unit electrically connected with the current acquisition unit, a processor electrically connected with the analog-to-digital conversion unit, and a first wireless communication unit electrically connected with the processor;
the acquisition module is still including setting up a plurality of expansion interfaces on the anti-skip control panel, the chassis car motor current of circuit breaker passes through one of them expansion interface inserts the anti-skip control panel, the current acquisition unit is connected with the expansion interface electricity of inserting chassis car motor current to gather chassis car motor current.
3. The on-line monitoring device of the circuit breaker according to claim 2, wherein the current collecting unit comprises a plurality of on-board hall current sensors, and each on-board hall current sensor is connected to one of the external interfaces or one of the expansion interfaces connected to the opening coil current, the closing coil current, the energy storage motor current and the chassis motor current to collect the opening coil current, the closing coil current, the energy storage motor current and the chassis motor current.
4. The on-line monitoring device of the circuit breaker as claimed in claim 2, wherein another expansion interface of the plurality of expansion interfaces is electrically connected with an angular displacement sensor for detecting a rotation angle of the main shaft of the circuit breaker;
the expansion interface electrically connected with the angular displacement sensor is electrically connected with the analog-to-digital conversion unit so as to convert the analog voltage signal collected by the angular displacement sensor into a digital signal.
5. The on-line monitoring device of circuit breaker as claimed in claim 4, wherein a plurality of said external interfaces are integrated on the same external interface module, and a plurality of expansion interfaces are integrated on the same expansion interface module.
6. The on-line monitoring device of circuit breaker according to claim 1,
the online monitoring device also comprises a wireless receiving module;
the on-line monitoring device further comprises an acquisition module, wherein the acquisition module comprises the current acquisition unit, an analog-digital conversion unit electrically connected with the current acquisition unit, a processor electrically connected with the analog-digital conversion unit and a first wireless communication unit electrically connected with the processor, the processor processes current data after digital-analog conversion to generate a current-time current oscillogram, extracts a characteristic value from the current oscillogram, and sends the current oscillogram and the extracted characteristic value to the wireless receiving module through the first wireless communication unit.
7. The on-line monitoring device of circuit breaker as claimed in claim 6, wherein the wireless receiving module includes a circuit board, a processing unit and a second wireless communication unit, the processing unit and the second wireless communication unit are disposed on the circuit board, the second wireless communication unit is in wireless communication with the first wireless communication unit to receive the current-time current waveform data and the characteristic value data of the current collecting unit, the processing unit stores the waveform data in a standard COMTRADE format, stores the characteristic value data as a report, and uploads the report to the background diagnosis system through the gateway of the wireless receiving module according to the IEC103 protocol.
8. The on-line monitoring device of the circuit breaker according to claim 7, further comprising a plurality of wireless temperature sensors for monitoring a contact, a contact arm, a bus bar lap joint and a cable lap joint of the circuit breaker, wherein the wireless receiving module is in wireless communication connection with each wireless temperature sensor to receive the temperature data collected by each wireless temperature sensor.
9. The on-line monitoring device of circuit breaker according to claim 8, characterized in that, the on-line monitoring device further comprises an extension module, the extension module is connected in series with the wireless receiving module;
the expansion module comprises an expansion circuit board, a processor and an analog-digital conversion unit, wherein the processor and the analog-digital conversion unit are arranged on the expansion circuit board;
the extension module is provided with a plurality of interfaces, and three-phase main loop current and grounding switch motor current are accessed to the extension module through the corresponding interfaces;
the on-line monitoring device further comprises a main loop current sensor used for monitoring the three-phase main loop current of the circuit breaker and a grounding switch current sensor used for monitoring the current of the grounding switch motor, the main loop current sensor is connected with an interface connected with the three-phase main loop current, the grounding switch current sensor is connected with an interface connected with the grounding switch motor, and the main loop current sensor and the grounding switch current sensor are located inside or outside the extension module.
10. The on-line monitoring device of circuit breaker according to claim 9,
the expansion module also comprises an opening and closing amount detection unit and an opening and closing amount detection interface, wherein the opening and closing amount detection unit is used for detecting the opening and closing times of the circuit breaker;
the opening amount detection unit is arranged inside the expansion module and comprises a voltage division loop and an opening amount sensor, and the expansion module transmits the opening amount detected by the opening amount sensor to the wireless receiving module through serial communication.
11. The on-line monitoring device of circuit breaker as claimed in claim 10, wherein the main loop current sensor and the grounding switch current sensor are open hall current sensors, and the open sensor is an optical coupling sensor.
12. A switchgear, comprising:
a cabinet body including a circuit breaker chamber and a low-voltage chamber;
an electrical trip prevention box provided in the breaker chamber, and
the on-line monitoring device of the circuit breaker as claimed in any one of claims 1 to 11, wherein the circuit breaker of the on-line monitoring device is disposed in the circuit breaker chamber, the current collecting unit of the on-line monitoring device is disposed in the electrical anti-trip box, and the wireless receiving module of the on-line monitoring device is disposed in the low-voltage chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022523219.3U CN213581252U (en) | 2020-11-04 | 2020-11-04 | On-line monitoring device of circuit breaker and switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022523219.3U CN213581252U (en) | 2020-11-04 | 2020-11-04 | On-line monitoring device of circuit breaker and switch cabinet |
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| CN213581252U true CN213581252U (en) | 2021-06-29 |
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| CN202022523219.3U Active CN213581252U (en) | 2020-11-04 | 2020-11-04 | On-line monitoring device of circuit breaker and switch cabinet |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |