CN112858740A - Insulation type test intelligent control cabinet for medium-voltage switchgear - Google Patents
Insulation type test intelligent control cabinet for medium-voltage switchgear Download PDFInfo
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- CN112858740A CN112858740A CN202110114817.1A CN202110114817A CN112858740A CN 112858740 A CN112858740 A CN 112858740A CN 202110114817 A CN202110114817 A CN 202110114817A CN 112858740 A CN112858740 A CN 112858740A
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- switch
- control cabinet
- intelligent control
- voltage switchgear
- wall bushing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
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Abstract
The invention relates to the technical field of control cabinets, in particular to an intelligent control cabinet for insulation type tests of medium-voltage switchgear. According to the invention, the outer shell adopts a closed design, so that external dust can be effectively reduced from entering the control platform, and the internal insulation level of the control platform can not be reduced in the long-term use process; the pneumatic control valve linear action switch has the advantages of small volume, light weight, high reliability and the like, can effectively save the internal space of a control platform, completely realizes gas-electric isolation, and improves the test safety.
Description
Technical Field
The invention relates to the technical field of control cabinets, in particular to an intelligent control cabinet for insulation type tests of medium-voltage switchgear.
Background
The medium voltage switchgear can be configured with different components according to different use conditions, the fault on-site isolation is realized, the power supply is rapidly recovered, the excellent characteristic of the reliability of the power supply is greatly improved, and therefore, the medium voltage switchgear is widely applied to power distribution systems, railway systems, factory enterprises, oil and gas fields and the like, the pattern test is a test performed for verifying whether products can meet all requirements of technical specifications or not, the pattern test is an essential link in new product identification, a traditional test method needs to connect a required test voltage source and a measurement system device when a test is performed, rewiring is needed when the state of a test product is changed or the test type is changed, the wiring state needs to be changed for many times by personnel for developing the test, the test efficiency is low, and therefore, the research on the intelligent control cabinet for the medium voltage switchgear insulation pattern test has important significance.
Disclosure of Invention
The invention aims to provide an insulation type test intelligent control cabinet for medium-voltage switchgear, which solves the existing problems that: the traditional test method needs to connect a required test voltage source and a required measurement system device during testing, and needs to re-wire when the state of a test article is changed or the type of the test is changed, so that personnel are required to change the wiring state for many times during testing, and the testing efficiency is low.
In order to achieve the purpose, the invention adopts the following technical scheme:
an intelligent control cabinet for insulation type tests of medium-voltage switchgear equipment comprises an external shell, a first wall bushing, a first insulation support, a first switch device, a second wall bushing, a second switch device and a second insulation support, wherein a plurality of first wall bushings are installed on the outer side of the external shell, a plurality of second wall bushings are further installed on the outer side of the external shell, terminals are arranged at two ends of each of the first wall bushing and the second wall bushing, the terminals, located on the outer side of the external shell, of the second wall bushing are respectively connected with an external power supply and a measurement system, the terminals, located on the inner side of the external shell, of the second wall bushing are connected with the second switch device, the second switch device is located inside the external shell, and the number of the second switch device is the same as that of the second wall bushings;
first switching device installs alone on first insulating pillar, can not be because of frequently moving vibrations influence first wall bushing and second wall bushing, first switching device is located inside the outside casing with first insulating pillar, first switching device's one end is kept away from with the inner wall of outside casing fixed to first insulating pillar, first switching device's quantity is the same with second switching device, the terminal connection sample terminal that first wall bushing is located the outside of the outside casing, the terminal that first wall bushing is located the outside casing inboard is provided with the switch contact, conveniently is connected with first switching device, second earthing switch and third earthing switch.
Preferably, the outside casing adopts the steel sheet to weld and forms, outside casing surface spraying plastics is handled, the outside casing outside is equipped with the access door, can make things convenient for later maintenance and maintenance, the outside casing outside has still been seted up pneumatic control hole.
Preferably, a second insulating support is further fixed inside the outer shell, the second switch device is installed on the second insulating support, and the first insulating support and the second insulating support are made of post insulators, so that the first wall bushing and the second wall bushing are prevented from being affected by frequent action and vibration.
Preferably, the first switch device is a pneumatic switch with an up-down linear motion, so that the internal space of the control platform can be effectively saved.
Preferably, the external shell is provided with a plurality of third grounding switches and a plurality of second grounding switches on one side of the second wall bushing, the number of the second grounding switches, the number of the third grounding switches and the number of the second wall bushing are the same, the second grounding switches and the third grounding switches are parallel linear motion switches, and when the switches are closed, the switches are connected with the contacts on the first wall bushing to realize the grounding function.
Preferably, the second switch device is a linear-motion pneumatic switch, so that the internal space of the control platform can be effectively saved, the second switch device is connected with the first switch device for pressurization, and the second switch device is connected with the second grounding switch and the third grounding switch for grounding.
Preferably, all switch fractures can be independently disconnected except for the linkage switch, pneumatic control valves are assembled on two sides of all switches, pneumatic and electric isolation is completely achieved, the pneumatic control valves detect the switch action in-place state and feed back signals to the control system, and the pneumatic control valves detect the switch action in-place state and feed back signals to the control system.
Preferably, a first grounding switch is further installed on the outer side of the outer shell, and the first grounding switch is connected with the test article underframe and the shell and serves as a protection switch.
Preferably, the bottom end of the outer casing is provided with a supporting beam, so that the outer casing can be effectively separated from the ground when being placed on the ground.
Preferably, the movable hooks are arranged at the four end corner positions at the top end of the outer shell, so that the carrying equipment is fixed with the movable hooks, and the device is conveniently carried or moved.
The invention has at least the following beneficial effects:
1. according to the invention, the test efficiency is obviously improved by changing the state of the test article or changing the test type without re-wiring.
2. According to the invention, the outer shell is designed in a closed manner, so that external dust can be effectively reduced from entering the control platform, the control platform is ensured not to have reduced internal insulation level in the long-term use process, and meanwhile, the shell is provided with the access door, so that the daily maintenance and overhaul of a user can be facilitated; the pneumatic control valve linear action switch has the advantages of small volume, light weight, high reliability and the like, can effectively save the internal space of a control platform, completely realize gas-electric isolation and improve the test safety; the pneumatic control valve detects the in-place state of the switch action and feeds back a signal to the control system; the control system can be applied to control the switch on-off and pressurization procedures of the switch and other related operations.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a left side view of the overall structure of an intelligent control cabinet for insulation type test of medium voltage switchgear according to the present invention;
fig. 2 is a front view of a connection structure of an insulation type test intelligent control cabinet of a medium voltage switchgear of the present invention;
FIG. 3 is an enlarged view of a partial structure of an insulation type test intelligent control cabinet of the medium voltage switchgear of the present invention;
FIG. 4 is a right side view of a connection structure of an insulation type test intelligent control cabinet of a medium voltage switchgear of the present invention;
FIG. 5 is a rear view of a connection structure of an insulation type test intelligent control cabinet of a medium voltage switchgear of the present invention;
fig. 6 is a schematic diagram of an intelligent control cabinet for insulation type test of medium voltage switchgear according to the present invention.
In the figure: 1. an outer housing; 2. a first ground switch; 3. a first wall bushing; 4. a first insulating support; 5. a first switching device; 6. a second ground switch; 7. a second wall bushing; 8. a second switching device; 9. a third ground switch; 10. a pneumatic control aperture; 11. a second insulating support.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 6, an intelligent control cabinet for insulation type test of medium voltage switchgear comprises an outer casing 1, a first wall bushing 3, a first insulation pillar 4, a first switchgear 5, the wall-penetrating switch comprises a second wall-penetrating sleeve 7, a second switch device 8 and a second insulating strut 11, wherein a plurality of first wall-penetrating sleeves 3 are installed on the outer side of an external shell 1, a plurality of second wall-penetrating sleeves 7 are also installed on the outer side of the external shell 1, a plurality of third grounding switches 9 and a plurality of second grounding switches 6 are also installed on one side, where the second wall-penetrating sleeves 7 are installed, of the external shell 1, the number of the second grounding switches 6, the number of the third grounding switches 9 and the number of the second wall-penetrating sleeves 7 are the same, the second grounding switches 6 and the third grounding switches 9 are parallel linear action switches, and when the switches are switched on and off, the switches are connected with contacts on the first wall-penetrating sleeves 3 so as to realize a grounding;
a first grounding switch 2 is further installed on the outer side of the outer shell 1, and the first grounding switch 2 is connected with the test article underframe and the shell and serves as a protection switch; the bottom end of the outer shell 1 is provided with a supporting beam, so that the outer shell 1 can be effectively separated from the ground when placed on the ground; the movable hooks are arranged at the four end corners of the top end of the outer shell 1, so that the carrying equipment can be conveniently fixed with the movable hooks, and the device can be conveniently carried or moved; the outer shell 1 is formed by welding steel plates, the surface of the outer shell 1 is subjected to plastic spraying treatment, an access door is assembled on the outer side of the outer shell 1, later maintenance and overhaul can be facilitated, and a pneumatic control hole 10 is further formed in the outer side of the outer shell 1;
terminals are arranged at two ends of the first wall bushing 3 and the second wall bushing 7, the terminals of the second wall bushing 7, which are positioned at the outer side of the outer shell 1, are respectively connected with an external power supply and a measuring system, the terminals of the second wall bushing 7, which are positioned at the inner side of the outer shell 1, are connected with a second switch device 8, the second switch device 8 is positioned inside the outer shell 1, and the number of the second switch devices 8 is the same as that of the second wall bushing 7; a second insulating support 11 is further fixed inside the outer shell 1, the second switch device 8 is installed on the second insulating support 11, and the first insulating support 4 and the second insulating support 11 are made of support insulators, so that the first wall bushing 3 and the second wall bushing 7 are prevented from being influenced by frequent action and vibration; the second switch device 8 is a linear motion type pneumatic switch, so that the internal space of the control platform can be effectively saved, the second switch device 8 is connected with the first switch device 5 for pressurization, and the second switch device 8 is connected with the second grounding switch 6 and the third grounding switch 9 for grounding;
the first switch device 5 is independently arranged on the first insulating support 4, the first wall bushing 3 and the second wall bushing 7 cannot be influenced by frequent action and vibration, the first switch device 5 is a pneumatic switch with an up-down linear action type, and the internal space of the control platform can be effectively saved; the first switch device 5 and the first insulation support 4 are located inside the external shell 1, one end, far away from the first switch device 5, of the first insulation support 4 is fixed to the inner wall of the external shell 1, the number of the first switch device 5 is the same as that of the second switch device 8, the terminal, located outside the external shell 1, of the first wall bushing 3 is connected with a test sample terminal, and the terminal, located inside the external shell 1, of the first wall bushing 3 is provided with a switch contact which is conveniently connected with the first switch device 5, the second grounding switch 6 and the third grounding switch 9.
All switch fractures can be independently disconnected except for the linkage switch, pneumatic control valves are assembled on two sides of all switches, pneumatic and electric isolation is completely achieved, the pneumatic control valves detect the switch action in-place state and feed back signals to the control system, and the pneumatic control valves detect the switch action in-place state and feed back signals to the control system.
The working principle is as follows: the first grounding switch 2 is connected with a test article underframe and a shell, the outer terminals of the first wall bushing 3 are respectively connected with a test article terminal ABCAbc during testing, the outer terminal of one second wall bushing 7 is connected with a power frequency testing transformer, and the outer terminals of other second wall bushings 7 are respectively connected with an impulse voltage generator and a measuring system thereof;
when a power frequency withstand voltage test is carried out, the first grounding switch 2 is connected with a test article chassis and a shell F, when a test article A is grounded by adding high voltage BCabcF, one of the second switch devices 8 is connected with one of the first switch devices 5, the first switch device 5 connected with the second switch device 8 is connected with the inner terminal of the first wall bushing 3 at the upper end of the first switch device, the rest of the second switch devices 8 are connected with the corresponding second grounding switch 6, and the first wall bushing 3 at the lower end of the outer shell 1 is respectively connected with the inner terminal of the second grounding switch 6 to realize grounding. Two of the third grounding switches 9 are connected with the inner terminals of the first wall bushing 3 corresponding to the upper end of the outer casing 1 to realize grounding.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An intelligent control cabinet for insulation type tests of medium-voltage switchgear equipment is characterized by comprising an outer shell (1), a first wall bushing (3), a first insulation strut (4), a first switch device (5), a second wall bushing (7), a second switch device (8) and a second insulation strut (11), wherein a plurality of first wall bushings (3) are installed on the outer side of the outer shell (1), a plurality of second wall bushings (7) are also installed on the outer side of the outer shell (1), terminals are respectively arranged at two ends of the first wall bushing (3) and the second wall bushing (7), the terminals of the second wall bushing (7) located on the outer side of the outer shell (1) are respectively connected with an external power supply and a measurement system, the terminals of the second wall bushing (7) located on the inner side of the outer shell (1) are connected with the second switch device (8), the second switch device (8) is positioned inside the outer shell (1), and the number of the second switch device (8) is the same as that of the second wall bushing (7);
the first switch device (5) is independently installed on a first insulating support column (4), the first switch device (5) and the first insulating support column (4) are located inside an external shell (1), one end, away from the first switch device (5), of the first insulating support column (4) is fixed to the inner wall of the external shell (1), the number of the first switch device (5) is the same as that of the second switch device (8), a terminal, located outside the external shell (1), of a first wall bushing (3) is connected with a test sample terminal, and a terminal, located inside the external shell (1), of the first wall bushing (3) is provided with a switch contact.
2. The intelligent control cabinet for the insulation type test of the medium voltage switchgear according to claim 1, wherein the outer casing (1) is welded by steel plates, the surface of the outer casing (1) is subjected to plastic spraying, an access door is assembled on the outer side of the outer casing (1), and a pneumatic control hole (10) is further formed on the outer side of the outer casing (1).
3. The intelligent control cabinet for insulation type test of medium voltage switchgear according to claim 1, wherein a second insulating support (11) is further fixed inside the outer casing (1), the second switchgear (8) is mounted on the second insulating support (11), and the first insulating support (4) and the second insulating support (11) are made of support insulators.
4. The intelligent control cabinet for insulation type testing of medium voltage switchgear according to claim 1, characterized in that the first switching device (5) is a pneumatic switch of the up-and-down linear action type.
5. The intelligent control cabinet for the insulation type test of the medium voltage switchgear according to claim 1, wherein a plurality of third grounding switches (9) and a plurality of second grounding switches (6) are further installed on one side of the outer shell (1) where the second wall bushing (7) is installed, the number of the second grounding switches (6), the number of the third grounding switches (9) and the number of the second wall bushing (7) are the same, and the second grounding switches (6) and the third grounding switches (9) are parallel linear motion switches.
6. The intelligent control cabinet for insulation type testing of medium voltage switchgear according to claim 1, characterized in that the second switching device (8) is a linear-action pneumatic switch.
7. The intelligent control cabinet for the insulation type test of the medium-voltage switchgear according to claim 1, wherein all the switch fractures can be independently opened and closed except for the ganged switch, and pneumatic control valves are assembled on two sides of all the switches.
8. The intelligent control cabinet for the insulation type test of the medium-voltage switchgear equipment as claimed in claim 1, wherein a first grounding switch (2) is further installed on the outer side of the outer casing (1), and the first grounding switch (2) is connected with a test article chassis and a shell and serves as a protection switch.
9. The intelligent control cabinet for insulation type testing of medium voltage switchgear according to claim 1, characterized in that the bottom end of the outer casing (1) is provided with a supporting beam.
10. The intelligent control cabinet for insulation type tests of medium voltage switchgear according to claim 1, characterized in that four corner positions at the top end of the outer casing (1) are provided with movable hooks.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110114817.1A CN112858740B (en) | 2021-01-26 | 2021-01-26 | Insulating type test intelligent control cabinet for medium-voltage switchgear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110114817.1A CN112858740B (en) | 2021-01-26 | 2021-01-26 | Insulating type test intelligent control cabinet for medium-voltage switchgear |
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| CN112858740A true CN112858740A (en) | 2021-05-28 |
| CN112858740B CN112858740B (en) | 2023-10-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113985268A (en) * | 2021-10-29 | 2022-01-28 | 西安高压电器研究院有限责任公司 | Intelligent equipment for insulation test of medium-voltage switchgear |
| CN117269691A (en) * | 2023-09-27 | 2023-12-22 | 国网山西省电力公司电力科学研究院 | System and method for testing internal state and insulation characteristic of wall bushing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113985268A (en) * | 2021-10-29 | 2022-01-28 | 西安高压电器研究院有限责任公司 | Intelligent equipment for insulation test of medium-voltage switchgear |
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| CN117269691B (en) * | 2023-09-27 | 2024-05-14 | 国网山西省电力公司电力科学研究院 | System and method for testing internal state and insulation characteristic of wall bushing |
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| CN112858740B (en) | 2023-10-20 |
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