CN210664586U - Cubical switchboard state monitoring sensor subassembly - Google Patents
Cubical switchboard state monitoring sensor subassembly Download PDFInfo
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- CN210664586U CN210664586U CN201921856804.6U CN201921856804U CN210664586U CN 210664586 U CN210664586 U CN 210664586U CN 201921856804 U CN201921856804 U CN 201921856804U CN 210664586 U CN210664586 U CN 210664586U
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Abstract
The application provides a switch cabinet state monitoring sensor assembly which comprises a hollow insulating shell, wherein an opening is formed in one side of the insulating shell, a metal shell is sealed on the opening, and the metal shell is installed at a set position in a switch cabinet, so that the surface, far away from the insulating shell, of the metal shell is attached to the surface of an inner cabinet door of the switch cabinet when the switch cabinet is closed; a transient earth voltage sensor, an ultrasonic sensor, an ultrahigh frequency sensor and a temperature sensor are arranged in the insulating shell; and a signal processing module and a signal transmission module are arranged in the insulating shell, the signal processing module receives the sensor signal and processes the signal and then sends the processed signal to the signal transmission module, and the signal transmission module transmits the received signal to an external controller. The beneficial effect of this application is: through set up each sensor in insulating casing, the condition of partial discharge and temperature variation in can real-time supervision cubical switchboard realizes the real-time on-line monitoring to the partial discharge situation and the temperature variation state of cubical switchboard.
Description
Technical Field
The utility model relates to a cubical switchboard state monitoring technology field, concretely relates to cubical switchboard state monitoring sensor subassembly.
Background
The switch cabinet is an important component unit in a power grid system and has double functions of controlling and protecting electrical equipment. In long-term operation, insulation faults of the switch cabinet bring hidden dangers to reliable operation of a power grid, and direct damage is damage to circuits and equipment controlled and protected by the switch cabinet and electric quantity loss; the indirect harm is large-area power failure of users, which causes huge economic loss, and therefore, the insulation state of the switch cabinet needs to be closely concerned. Partial discharge monitoring can effectively judge the insulation state of electrical equipment, and the currently common switch cabinet partial discharge monitoring method mainly takes an ultrahigh frequency and transient ground voltage method and an ultrasonic wave method as main methods. The temperature of the cable compartment of the switch cabinet is an important external factor influencing the insulation parameters of the power equipment, and the discharge fault of the equipment caused by the overhigh temperature of the cable compartment of the switch cabinet happens to the switch cabinet.
The sensor technology is evolving towards the direction of miniaturization and integration, the function of the current local discharge sensor of the switch cabinet is single, and various sensors need to be installed in an on-line monitoring system of the switch cabinet, so that the workload of installation and wiring is increased, and the sensor installation work is complicated.
Disclosure of Invention
The purpose of this application is to provide a cubical switchboard state monitoring sensor subassembly to above problem.
In a first aspect, the application provides a switch cabinet state monitoring sensor assembly, which comprises a hollow insulating shell, wherein an opening is formed in one side of the insulating shell, a metal shell is sealed on the opening, the metal shell is connected to four corners of the insulating shell through bolts, and the metal shell is installed at a set position in a switch cabinet, so that the surface, away from the insulating shell, of the metal shell is attached to the surface of an inner cabinet door of the switch cabinet when the switch cabinet is closed; a transient ground voltage sensor is arranged at a position, with a set distance, away from the metal shell in the insulating shell, and the transient ground voltage sensor is configured to monitor a pulse voltage signal generated by electromagnetic waves during partial discharge in the switch cabinet; the side surface of the insulating shell, which is far away from the metal shell, is provided with an ultrasonic sensor, an ultrahigh frequency sensor and a temperature sensor respectively; the ultrasonic sensor is configured to monitor an ultrasonic signal generated during partial discharge inside the switch cabinet; the ultrahigh frequency sensor is configured for monitoring ultrahigh frequency signals generated inside the switch cabinet; the temperature sensor is configured to monitor a temperature signal within the switchgear cabinet; a signal processing module and a signal transmission module are arranged in the insulating shell, the signal processing module is respectively in signal connection with the transient ground voltage sensor, the ultrasonic sensor, the ultrahigh frequency sensor and the temperature sensor, the signal processing module is in signal connection with the signal transmission module, and the signal processing module is arranged in the middle of the insulating shell; the signal processing module is configured to receive signals sent by the transient ground voltage sensor, the ultrasonic sensor, the ultrahigh frequency sensor and the temperature sensor, process the signals received by the signals and send the processed signals to the signal transmission module, and the signal transmission module transmits the received signals to an external controller.
According to the technical scheme that this application embodiment provided, install on the insulating housing ultrasonic sensor, superfrequency sensor and temperature sensor's side sets up the mounting hole respectively, ultrasonic sensor, superfrequency sensor and temperature sensor inlay respectively and correspond in the mounting hole.
According to the technical scheme provided by the embodiment of the application, the outer surface of the insulating shell is provided with a bearing plate corresponding to each mounting hole, and the bearing plate is mounted at the lower edge of the mounting hole, so that the lower surface of a sensor which penetrates through the mounting hole and extends to the outside of the insulating shell is lapped on the bearing plate; the outer surface of the insulating shell is provided with abutting plates corresponding to the mounting holes respectively, and the abutting plates can movably abut against the upper surface of a sensor penetrating through the mounting holes and extending to the outside of the insulating shell.
According to the technical scheme provided by the embodiment of the application, a pair of first grooves is inwards recessed on the surface, close to the abutting plate, of the supporting plate, and the first grooves extend from the position close to the insulating shell to the direction far away from the insulating shell; the sensor comprises an insulating shell, a spring is arranged in the first groove, one end of the spring is fixed on the groove wall of the insulating shell, which is close to the first groove, the other end of the spring is connected with a separation blade extending out of the first groove, and the spring is pulled to enable the separation blade to be attached to the surface of the sensor extending to the outside of the insulating shell.
According to the technical scheme that this application embodiment provided, the insulating casing surface corresponds each the both sides of mounting hole set up a pair of draw-in groove, the butt plate both sides correspond the draw-in groove sets up first through-hole respectively, passes the joint of first through-hole is in bolt in the draw-in groove will the butt plate is fixed insulating casing's surface.
According to the technical scheme that this application embodiment provided, the butt joint board is close to the side middle part of bearing board is equipped with the arc bellying, removes the butt joint board makes the bellying butt extends to the upper surface of the outside sensor of insulating housing.
According to the technical scheme provided by the embodiment of the application, the set distance ranges from 1.5mm to 3.5 mm.
According to the technical scheme provided by the embodiment of the application, the sum of the volumes of the insulating shell and the metal shell is less than or equal to 1000cm3。
According to the technical scheme provided by the embodiment of the application, the signal processing module comprises a filtering unit, an amplifying unit, a detecting unit, a local signal processing unit and a temperature signal processing unit; signals sent by the ultrasonic sensor, the transient ground voltage sensor and the ultrahigh frequency sensor sequentially pass through the filtering unit, the amplifying unit and the detecting unit and then enter the local signal processing unit, and the local signal processing unit is in signal connection with the signal transmission module; and the signal sent by the temperature sensor enters the temperature signal processing unit, and the temperature signal processing unit is in signal connection with the signal transmission module.
The invention has the beneficial effects that: the application provides a switch cabinet state monitoring sensor assembly, which comprises a hollow insulating shell, wherein an opening is formed in one side of the insulating shell, a metal shell is sealed on the opening and connected to four corners of the insulating shell through bolts, and the metal shell is installed at a set position in a switch cabinet, so that the surface, away from the insulating shell, of the metal shell is attached to the surface of an inner cabinet door of the switch cabinet when the switch cabinet is closed; a transient ground voltage sensor is arranged at a position, with a set distance, away from the metal shell in the insulating shell, and the transient ground voltage sensor is configured to monitor a pulse voltage signal generated by electromagnetic waves during partial discharge in the switch cabinet; the side surface of the insulating shell, which is far away from the metal shell, is provided with an ultrasonic sensor, an ultrahigh frequency sensor and a temperature sensor respectively; the ultrasonic sensor is configured to monitor an ultrasonic signal generated during partial discharge inside the switch cabinet; the ultrahigh frequency sensor is configured for monitoring ultrahigh frequency signals generated inside the switch cabinet; the temperature sensor is configured to monitor a temperature signal within the switchgear cabinet; a signal processing module and a signal transmission module are arranged in the insulating shell, the signal processing module is respectively in signal connection with the transient ground voltage sensor, the ultrasonic sensor, the ultrahigh frequency sensor and the temperature sensor, the signal processing module is in signal connection with the signal transmission module, and the signal processing module is arranged in the middle of the insulating shell; the signal processing module is configured to receive signals sent by the transient ground voltage sensor, the ultrasonic sensor, the ultrahigh frequency sensor and the temperature sensor, process the signals received by the signals and send the processed signals to the signal transmission module, and the signal transmission module transmits the received signals to an external controller.
Through set up each sensor in the insulating casing, can monitor the superfrequency signal, ultrasonic signal, transient state ground voltage signal and the temperature signal that partial discharge produced simultaneously, four kinds of monitoring methods get the strong point and make up for the weak point, form complementally, need not to change different grade type sensors and can monitor the partial discharge condition comprehensively, improve sensor data collection's reliability and variety. Meanwhile, the signal acquisition, signal processing and data transmission functions are integrated into one sensor assembly, and the sensor assembly which integrates multiple functions is installed in a cable bin of the switch cabinet, so that the normal work of the switch cabinet is not influenced, the installation and wiring work is reduced, and the internal space of the switch cabinet is saved.
Drawings
FIG. 1 is a schematic plan view of a first embodiment of the present application;
FIG. 2 is a schematic structural diagram of an insulating housing and a metal housing according to a first embodiment of the present disclosure;
FIG. 3 is a schematic structural view of a mounting hole of an insulating housing according to a first embodiment of the present application;
fig. 4 is a schematic structural diagram of the installation of the insulating housing and the metal housing in the switch cabinet according to the first embodiment of the present application;
FIG. 5 is a schematic side view of a portion of a first embodiment of the present application showing a temperature sensor mounted on an insulative housing;
FIG. 6 is a schematic partial front view of a temperature sensor mounted on an insulating housing according to a first embodiment of the present application;
FIG. 7 is a schematic top view of a first embodiment of the present application on a support plate;
FIG. 8 is a schematic block diagram of condition monitoring in accordance with a first embodiment of the present application;
the text labels in the figures are represented as: 100. an insulating housing; 110. mounting holes; 120. a card slot; 200. a metal housing; 310. a transient voltage sensor; 320. an ultrasonic sensor; 330. an ultrahigh frequency sensor; 340. a temperature sensor; 350. a signal processing module; 351. a filtering unit; 352. an amplifying unit; 353. a detection unit; 354. a local signal processing unit; 355. a temperature signal processing unit; 360. a signal transmission module; 410. a support plate; 411. a first groove; 412. a spring; 413. a baffle plate; 420. a butt joint plate; 421. a boss portion; 500. provided is a switch cabinet.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings, and the description of the present section is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention in any way.
Fig. 1 to 4 are schematic diagrams illustrating a first embodiment of the present application, which includes a hollow insulating housing 100, one side of the insulating housing 100 is provided with an opening, a metal housing 200 is sealed on the opening, the metal housing 200 is connected to four corners of the insulating housing 100 through bolts, and the metal housing 200 is installed at a set position in a switch cabinet 500, so that a surface of the metal housing 200 away from the insulating housing 100 is attached to a surface of an inner cabinet door of the switch cabinet 500 when the switch cabinet is closed. In this embodiment, the insulating housing 100 and the metal housing 200 are both disposed in the cable compartment of the switch cabinet 500. Preferably, in warranty testingOn the premise of measuring accuracy, in order to occupy the space in the switch cabinet as little as possible, the sum of the volumes of the insulating shell 100 and the metal shell 200 is less than or equal to 1000cm3。
A transient ground voltage sensor 310 is disposed at a predetermined distance from the metal case 200 in the insulating case 100, and the transient ground voltage sensor 310 is configured to monitor a pulse voltage signal generated by an electromagnetic wave during a partial discharge inside the switchgear 500. Preferably, the set distance is 2mm, and in other preferred embodiments, the set distance may also be 1.5mm, 3.5mm, or any value in the range of 1.5mm to 3.5 mm.
In this embodiment, since the surface of the metal casing 200 away from the insulating casing 100 is attached to the surface of the inner side of the cabinet door of the switch cabinet 500 when the switch cabinet 500 is closed, when the transient voltage sensor 310 has a gap with a set distance from the surface of the metal casing 200, a coupling capacitor with a certain distance is formed between the transient voltage sensor 310 and the switch cabinet 500, so as to detect the pulse voltage signal generated during partial discharge in the switch cabinet 500. When the surface of the switch cabinet 500 is partially discharged, a rapidly changing transient ground voltage signal occurs, and a high-frequency pulse current signal is induced on the metal housing 200 to be detected by the transient ground voltage sensor 310. Therefore, when the partial discharge of the switchgear is measured by the transient ground voltage method, the transient ground voltage sensor 310 should be spaced apart from the switchgear 500 to couple to the pulse current. If the surface of the metal housing 200 is not attached to the surface of the switch cabinet 500, a stray capacitance is generated between the two, thereby affecting the detection accuracy of the pulse voltage signal.
An ultrasonic sensor 320, an ultrahigh frequency sensor 330 and a temperature sensor 340 are respectively mounted on the side surface of the insulating housing 100 far away from the metal housing 200.
The ultrasonic sensor 320 is configured to monitor an ultrasonic signal generated when the inside of the switch cabinet 500 is partially discharged; the uhf sensor 330 is configured to monitor an uhf signal generated inside the switchgear cabinet 500; the temperature sensor 340 is configured to monitor a temperature signal within the switchgear cabinet 500.
The ultrahigh frequency sensor 330 and the transient ground voltage sensor 310 have good monitoring effects on point discharge, corona discharge and insulation internal discharge, but are not sensitive to creeping discharge. The object monitored by the uhf sensor 330 is an electromagnetic wave signal generated by partial discharge, and the attenuation of the electromagnetic wave signal is severe when the electromagnetic wave signal passes through a metal. Therefore, metal parts are avoided in the path of the uhf sensor 330 receiving the electromagnetic wave signal when the sensor is designed, and thus the fixed uhf sensor 330 is provided as an insulated case.
In this embodiment, the ultrasonic sensor 320 has a good monitoring effect on surface discharge and insulator surface discharge, but is not sensitive to internal discharge of the insulator. Therefore, when the insulation defect of the switch cabinet is monitored, the ultrahigh frequency method, the transient earth voltage method and the ultrasonic method are used in a matched mode, and temperature measurement is combined to serve as an auxiliary means, so that the partial discharge condition can be monitored more comprehensively, and more reliable data can be provided for the diagnosis of the insulation fault of the switch cabinet.
A signal processing module 350 and a signal transmission module 360 are arranged in the insulating shell 100, the signal processing module 350 is in signal connection with the transient ground voltage sensor 310, the ultrasonic sensor 320, the ultrahigh frequency sensor 330 and the temperature sensor 340 respectively, the signal processing module 350 is in signal connection with the signal transmission module 360, and the signal processing module 350 is arranged in the middle of the insulating shell 100; the signal processing module 350 is configured to receive signals sent by the transient ground voltage sensor 310, the ultrasonic sensor 320, the ultrahigh frequency sensor 330, and the temperature sensor 340, respectively, perform signal processing on each received signal, and send each received signal to the signal transmission module 360, where the signal transmission module 360 transmits each received signal to an external controller.
In this embodiment, the side surfaces of the insulating housing 100 on which the ultrasonic sensor 320, the uhf sensor 330 and the temperature sensor 340 are mounted are respectively provided with mounting holes 110, and the ultrasonic sensor 320, the uhf sensor 330 and the temperature sensor 340 are respectively embedded in the corresponding mounting holes 110. In this embodiment, the bottom surface of the insulating housing 100 is further provided with through holes for the equipotential lines and the communication and power terminals. In the present embodiment, the ultrasonic sensor 320, the uhf sensor 330, and the temperature sensor 340 are embedded on the side surface of the insulating housing 100, so that a part of the sensors is located inside the insulating housing 100, and the rest of the sensors is located outside the insulating housing 100.
In this embodiment, the signal transmission module 360 is provided with a photoelectric coupler to avoid the interference of external signals to the transmission signals. In the embodiment, the communication and power terminal interface adopts a 5-pin terminal strip, and signals processed by signals of each sensor are transmitted to the background host computer in a wired mode through 485 communication and power wiring, so that the stability of signal transmission is ensured.
In a preferred embodiment, a protrusion is disposed inside the metal casing 200, an equipotential line is connected to the protrusion, one end of the equipotential line is connected to the protrusion, and the other end of the equipotential line passes through the row of equipotential lines of the insulating casing 100 and then is connected to the cabinet body of the switch cabinet 500. The equipotential lines enable the metal shell 200 made of metal and the switch cabinet 500 to form equipotential, so that stray capacitance between the metal shell and the switch cabinet is avoided, and the detection accuracy of the signal of the transient ground voltage sensor 310 is affected.
In a preferred embodiment, since each sensor mounted on the insulating housing 100 has a portion located outside the insulating housing 100, in order to ensure the stability of the sensor mounting in the insulating housing 100: a support plate 410 is respectively arranged on the outer surface of the insulating shell 100 corresponding to each mounting hole 110, the support plate 410 is mounted on the lower edge of the mounting hole 110, so that the lower surface of the sensor extending to the outside of the insulating shell 100 through the mounting hole 110 is lapped on the support plate 410; an abutting plate 420 is disposed on the outer surface of the insulating housing 100 corresponding to each of the mounting holes 110, and the abutting plate 420 movably abuts against the upper surface of the sensor extending to the outside of the insulating housing 100 through the mounting hole 110. Fig. 5 and 6 are schematic views illustrating an example in which the temperature sensor 340 is mounted in the mounting hole 110 of the insulating housing 100.
In the preferred embodiment, the lower surface of the sensor extending out of the insulating housing 100 is overlapped on the supporting plate 410, and the abutting plate 420 located above the sensor is moved at the same time, so that the abutting plate 420 abuts on the upper surface of the sensor extending out of the insulating housing 100, and therefore the supporting plate 410 and the abutting plate 420 are used in cooperation to limit the sensor, and the stability of mounting the sensor embedded on the insulating housing 100 is improved.
In a preferred embodiment, a pair of first grooves 411 are recessed in the surface of the supporting plate 410 close to the abutting plate 420, and the first grooves 411 extend from the position close to the insulating housing 100 to the direction away from the insulating housing 100; a spring 412 is arranged in the first groove 411, one end of the spring 412 is fixed on the wall of the first groove 411 close to the insulating housing 100, the other end of the spring 412 is connected with a blocking piece 413 extending out of the first groove 411, and the spring 412 is pulled to enable the blocking piece 413 to be attached to the surface of the sensor extending out of the insulating housing 100.
In the preferred embodiment, as shown in fig. 7, in order to further increase the stability of the sensor overlapped on the supporting plate 410, a stop piece 413 is provided on the supporting plate 410 corresponding to the end of the sensor, and the stop piece 413 connected with the spring 412 is attached to the end surface of the sensor far away from the insulating housing 100, so that the part of the sensor protruding out of the insulating housing 100 is limited between the stop piece 413 and the mounting hole 110, thereby increasing the stability of the sensor placed on the supporting plate 410.
In a preferred embodiment, a pair of slots 120 is disposed on the outer surface of the insulating housing 100 corresponding to two sides of each of the mounting holes 110, first through holes are disposed on two sides of the abutting plate 420 corresponding to the slots 120, respectively, and bolts passing through the first through holes and engaged in the slots 120 fix the abutting plate 420 on the outer surface of the insulating housing 100. The vertical height of the abutting plate 420 from the bearing plate 410 is adjusted by adjusting the position of the abutting plate 420 in the slot 120, and the abutting plate 420 is fixed in the slot 120 through a bolt.
Preferably, an arc-shaped protrusion 421 is disposed at the middle of the side surface of the abutting plate 420 near the supporting plate 410, and the abutting plate 420 is moved to make the protrusion 421 abut on the upper surface of the sensor extending to the outside of the insulating housing 100. Set up bellying 421 in the middle part of butt plate 420, can not make butt plate 420 stabilize the surface of butt contact sensor when avoiding butt plate 420 not flat, set up the bellying 421 of evagination on butt plate 420 and can guarantee butt plate 420's bellying 421 and the surface contact of sensor.
In a preferred embodiment, as shown in fig. 8, the signal processing module 350 includes a filtering unit 351, an amplifying unit 352, a detecting unit 353, a local signal processing unit 354 and a temperature signal processing unit 355; the signals transmitted by the ultrasonic sensor 320, the transient ground voltage sensor 310 and the ultrahigh frequency sensor 330 sequentially pass through the filtering unit 351, the amplifying unit 352 and the detecting unit 353, and then enter the local signal processing unit 354, and the local signal processing unit 354 is in signal connection with the signal transmission module 360; the signal sent by the temperature sensor 340 enters the temperature signal processing unit 355, and the temperature signal processing unit 355 is in signal connection with the signal transmission module 360.
In this embodiment, through set up each sensor in insulating casing 100, can monitor the superfrequency signal, ultrasonic signal, transient state ground voltage signal and the temperature signal that partial discharge produced simultaneously, four kinds of monitoring methods get the strong point and make up for the weakness, form complementally, need not to change different grade type sensors and can monitor the partial discharge condition comprehensively, improve the reliability and the variety of sensor data collection. Meanwhile, the signal acquisition, signal processing and data transmission functions are integrated into one sensor assembly, and the sensor assembly which integrates multiple functions is installed in a cable bin of the switch cabinet, so that the normal work of the switch cabinet is not influenced, the installation and wiring work is reduced, and the internal space of the switch cabinet is saved.
The principles and embodiments of the present application are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present application, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments, or may be learned by practice of the invention.
Claims (9)
1. The switch cabinet state monitoring sensor assembly is characterized by comprising a hollow insulating shell (100), wherein one side of the insulating shell (100) is provided with an opening, a metal shell (200) is sealed on the opening, the metal shell (200) is connected to four corners of the insulating shell (100) through bolts, and the metal shell (200) is installed at a set position in a switch cabinet (500) so that the surface of the metal shell (200) far away from the insulating shell (100) is attached to the surface of an inner side cabinet door of the switch cabinet (500) when the switch cabinet is closed;
a transient ground voltage sensor (310) is arranged in a position, which is a set distance away from the metal shell (200), in the insulating shell (100), and the transient ground voltage sensor (310) is configured to monitor a pulse voltage signal generated by electromagnetic waves when partial discharge occurs in the switch cabinet (500);
an ultrasonic sensor (320), an ultrahigh frequency sensor (330) and a temperature sensor (340) are respectively arranged on the side surface of the insulating shell (100) far away from the metal shell (200); the ultrasonic sensor (320) is configured to monitor an ultrasonic signal generated when partial discharge occurs inside the switch cabinet (500); the ultrahigh frequency sensor (330) is configured to monitor ultrahigh frequency signals generated inside the switch cabinet (500); the temperature sensor (340) is configured to monitor a temperature signal within the switchgear cabinet (500);
a signal processing module (350) and a signal transmission module (360) are arranged in the insulating shell (100), the signal processing module (350) is respectively in signal connection with the transient ground voltage sensor (310), the ultrasonic sensor (320), the ultrahigh frequency sensor (330) and the temperature sensor (340), the signal processing module (350) is in signal connection with the signal transmission module (360), and the signal processing module (350) is arranged in the middle of the insulating shell (100);
the signal processing module (350) is configured to receive signals sent by the transient ground voltage sensor (310), the ultrasonic sensor (320), the ultrahigh frequency sensor (330) and the temperature sensor (340), process the received signals and send the processed signals to the signal transmission module (360), and the signal transmission module (360) transmits the received signals to an external controller.
2. The switch cabinet state monitoring sensor assembly according to claim 1, wherein mounting holes (110) are respectively formed in the side surfaces of the insulating housing (100) where the ultrasonic sensor (320), the ultrahigh frequency sensor (330) and the temperature sensor (340) are mounted, and the ultrasonic sensor (320), the ultrahigh frequency sensor (330) and the temperature sensor (340) are respectively embedded in the corresponding mounting holes (110).
3. The switch cabinet condition monitoring sensor assembly according to claim 2, wherein a support plate (410) is respectively arranged on the outer surface of the insulating shell (100) corresponding to each mounting hole (110), the support plate (410) is mounted on the lower edge of the mounting hole (110), so that the lower surface of the sensor extending to the outside of the insulating shell (100) through the mounting hole (110) is lapped on the support plate (410);
an abutting plate (420) is respectively arranged on the outer surface of the insulating shell (100) corresponding to each mounting hole (110), and the abutting plate (420) movably abuts against the upper surface of the sensor extending to the outside of the insulating shell (100) through the mounting hole (110).
4. The switch cabinet condition monitoring sensor assembly according to claim 3, wherein the surface of the support plate (410) adjacent to the abutting plate (420) is recessed with a pair of first grooves (411), the first grooves (411) extend from adjacent to the insulating housing (100) to a direction away from the insulating housing (100); be equipped with spring (412) in first recess (411), the one end of spring (412) is fixed first recess (411) are close to on the cell wall of insulating housing (100), and the other end is connected with and stretches out separation blade (413) of first recess (411), and the pulling spring (412) make separation blade (413) laminating extend to the surface of the outside sensor of insulating housing (100).
5. The switch cabinet condition monitoring sensor assembly according to claim 3, wherein a pair of slots (120) is disposed on the outer surface of the insulating housing (100) corresponding to two sides of each mounting hole (110), first through holes are disposed on two sides of the abutting plate (420) corresponding to the slots (120), and bolts passing through the first through holes and engaged in the slots (120) fix the abutting plate (420) on the outer surface of the insulating housing (100).
6. The switch cabinet condition monitoring sensor assembly according to claim 5, wherein the abutting plate (420) is provided with an arc-shaped protruding portion (421) near the middle of the side surface of the supporting plate (410), and the abutting plate (420) is moved to make the protruding portion (421) abut on the upper surface of the sensor extending to the outside of the insulating housing (100).
7. The switchgear state monitoring sensor assembly of claim 1, wherein the set distance is in a range of 1.5mm-3.5 mm.
8. The switch cabinet condition monitoring sensor assembly of claim 1, wherein the sum of the volumes of the insulating housing and the metal housing is 1000cm3 or less.
9. The switch cabinet condition monitoring sensor assembly according to claim 1, wherein the signal processing module (350) comprises a filtering unit (351), an amplifying unit (352), a detecting unit (353), a local signal processing unit (354) and a temperature signal processing unit (355);
signals sent by the ultrasonic sensor (320), the transient ground voltage sensor (310) and the ultrahigh frequency sensor (330) sequentially pass through the filtering unit (351), the amplifying unit (352) and the detecting unit (353) and then enter the local signal processing unit (354), and the local signal processing unit (354) is in signal connection with the signal transmission module (360); the signal sent by the temperature sensor (340) enters the temperature signal processing unit (355), and the temperature signal processing unit (355) is in signal connection with the signal transmission module (360).
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| CN201921856804.6U CN210664586U (en) | 2019-10-31 | 2019-10-31 | Cubical switchboard state monitoring sensor subassembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557854A (en) * | 2020-12-22 | 2021-03-26 | 杭州电力设备制造有限公司 | Design method of built-in ultrasonic array type partial discharge intelligent sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112557854A (en) * | 2020-12-22 | 2021-03-26 | 杭州电力设备制造有限公司 | Design method of built-in ultrasonic array type partial discharge intelligent sensor |
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