CN111366818A - Conversion device for carrying out withstand voltage test on three-phase box-shared GIS equipment - Google Patents
Conversion device for carrying out withstand voltage test on three-phase box-shared GIS equipment Download PDFInfo
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- CN111366818A CN111366818A CN201811601074.5A CN201811601074A CN111366818A CN 111366818 A CN111366818 A CN 111366818A CN 201811601074 A CN201811601074 A CN 201811601074A CN 111366818 A CN111366818 A CN 111366818A
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 239000004020 conductor Substances 0.000 claims abstract description 159
- 230000005540 biological transmission Effects 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 241000208199 Buxus sempervirens Species 0.000 claims abstract description 22
- 239000012212 insulator Substances 0.000 claims abstract description 20
- 239000003463 adsorbent Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 14
- 238000012353 t test Methods 0.000 abstract 1
- 229910018503 SF6 Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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Abstract
The invention discloses a conversion device for carrying out a withstand voltage test on three-phase common-box GIS equipment, which comprises a shell, an inner conductor and a transmission mechanism, wherein the inner conductor and the transmission mechanism are arranged in the shell; the shell is provided with a first through hole and a second through hole which is coaxially arranged with the first through hole; the first port is connected with the three-phase equipment through a first air-isolating insulator; the second port is connected with the one-way equipment through a second air-insulated insulator; the inner conductor comprises a three-phase conductor fixed on the first air isolation insulator, a connecting conductor fixed on the second air isolation insulator and a rotary conductor rotatably arranged on the connecting conductor, A, B, C phase conductors of the three-phase conductor fall on a rotary circumference taking the axis of the rotary conductor as the center, and the tail end of the rotary conductor is provided with a connecting position which is transversely arranged; the transmission mechanism is used for transmitting the driving force required by the rotation of the rotary conductor. Above-mentioned conversion equipment has avoided the restriction of factory building height and spatial distance and the problem that can't test, and easy operation is convenient simultaneously.
Description
Technical Field
The invention relates to the technical field of withstand voltage tests, in particular to a conversion device for carrying out withstand voltage tests on three-phase common-box GIS equipment.
Background
A gas insulated metal enclosed switchgear, GIS for short, is a complete set of combined electrical apparatus using sulfur hexafluoride gas as insulating and arc extinguishing medium, and is composed of high-voltage electrical apparatus elements such as circuit breaker, isolation grounding combined switch, fast grounding switch, current transformer, voltage transformer, lightning arrester, incoming and outgoing line sleeve or cable terminal. The method can be used for various power plants and substations in alternating current power systems with different voltage grades. The system has the characteristics of small occupied area, small occupied space, no influence of external environmental conditions, no noise and radio interference, safe and reliable operation, small maintenance workload and the like, and is particularly suitable for urban transformer substations with short land, enterprise transformer substations, mountain hydropower stations and seriously polluted areas.
The three-phase is case GIS altogether can dispose single-phase PT (voltage transformer) usually when the design is used, and when the three-phase is case GIS equipment altogether is connected with single-phase PT, need set up the isolation fracture before the single-phase PT, and present isolation fracture only is detachable construction, need manually disassemble the conductor, and need fill and discharge sulfur hexafluoride gas many times, and the operation is inconvenient, and the mode is old. With the development of power grids, the number of the three-phase common-box GIS arranged in a cable outgoing mode is more and more. At present, enterprises at home and abroad utilize a three-phase sleeve to carry out a withstand voltage test on three-phase common-box GIS equipment in a traditional mode, the test method can often cause that the three-phase withstand voltage equipment cannot be used for testing due to the limitation of the height and the space distance of a factory building, and the traditional withstand voltage test mode has the disadvantages of complex structure, inconvenient operation and high cost.
In summary, how to solve the problems that the limitation of the height and the space distance of a factory building is easy to occur when a three-phase box-shared GIS device is subjected to a voltage withstand test, the test cannot be performed, and the test mode is complicated in structure and inconvenient to operate becomes a technical problem that needs to be solved by technical personnel in the field urgently.
Disclosure of Invention
The invention aims to provide a conversion device for carrying out a voltage withstand test on three-phase box-shared GIS equipment, which solves the problems that the limitation of the height and the space distance of a factory building is easy to occur when the voltage withstand test is carried out on the three-phase box-shared GIS equipment, the test cannot be carried out and the test mode is complicated in structure and inconvenient to operate.
In order to achieve the purpose, the invention provides a conversion device for carrying out a withstand voltage test on three-phase common-box GIS equipment, which comprises a shell, an inner conductor and a transmission mechanism, wherein the inner conductor and the transmission mechanism are arranged in the shell;
the shell is provided with a first through hole and a second through hole which is coaxially arranged with the first through hole; the first port is connected with the three-phase equipment through a first air-isolating insulator; the second through hole is connected with the one-way equipment through a second air-insulated insulator;
the inner conductor comprises a three-phase conductor fixed on the first gas isolation flange, a connecting conductor fixed on the second gas isolation insulator and a rotary conductor rotatably arranged on the connecting conductor, wherein the A-phase conductor, the B-phase conductor and the C-phase conductor of the three-phase conductor all fall on a rotary circumference taking the axis of the rotary conductor as the center, and the tail end of the rotary conductor is provided with a transversely arranged connecting position;
when the rotating conductor rotates to a first preset position, the connecting position is connected with the A-phase conductor; when the rotating conductor rotates to a second preset position, the connecting position is connected with the B-phase conductor; when the rotating conductor rotates to a third preset position, the connecting position is connected with the C-phase conductor; when the rotating conductor rotates to a fourth preset position, the connecting position and the A-phase conductor, the B-phase conductor and the C-phase conductor are in isolated fracture states;
the transmission mechanism is used for transmitting the driving force required by the rotation of the rotating conductor.
Preferably, the side of the housing is further provided with a mounting opening and a cover plate for cooperating with the mounting opening.
Preferably, a density relay for monitoring the air pressure condition of the air chamber in the shell in real time is arranged on the cover plate.
Preferably, the side of the cover plate facing the mounting opening is further provided with an adsorbent.
Preferably, the side surface of the shell is further provided with an observation window for observing the position of the connecting position.
Preferably, the number of the observation windows is two, and the two observation windows are arranged at 180 °.
Preferably, the transmission mechanism comprises an insulating transmission shaft which is rotatably and transversely arranged on the housing through a shaft seal, one end of the insulating transmission shaft is positioned outside the housing, the other end of the insulating transmission shaft is provided with a first bevel gear, and the rotating conductor is provided with a second bevel gear meshed with the first bevel gear.
Preferably, one end of the insulated transmission shaft, which is positioned outside the shell, is provided with a manual crank arm.
Preferably, one end of the insulated transmission shaft, which is located outside the housing, is connected with a driving motor.
Preferably, the driving motor is further provided with a remote controller.
Compared with the introduction content of the background technology, the conversion device for carrying out the withstand voltage test on the three-phase common-box GIS equipment comprises a shell, an inner conductor and a transmission mechanism, wherein the inner conductor and the transmission mechanism are arranged in the shell; the shell is provided with a first through hole and a second through hole which is coaxially arranged with the first through hole; the first port is connected with the three-phase equipment through a first air-isolating insulator; the second port is connected with the one-way equipment through a second air-insulated insulator; the inner conductor comprises a three-phase conductor fixed on the first air isolation insulator, a connecting conductor fixed on the second air isolation insulator and a rotary conductor rotatably arranged on the connecting conductor, the A-phase conductor, the B-phase conductor and the C-phase conductor of the three-phase conductor all fall on a rotary circumference taking the axis of the rotary conductor as the center, and the tail end of the rotary conductor is provided with a transversely arranged connecting position; when the rotating conductor rotates to a first preset position, the connecting position is connected with the A-phase conductor; when the rotating conductor rotates to a second preset position, the connecting position is connected with the B-phase conductor; when the rotating conductor rotates to a third preset position, the connecting position is connected with the C-phase conductor; when the rotating conductor rotates to a fourth preset position, the connecting position and the A-phase conductor, the B-phase conductor and the C-phase conductor are in isolated fracture states; the transmission mechanism is used for transmitting the driving force required by the rotation of the rotary conductor. In the practical application process of the conversion device, the external driving force is transmitted to the rotating conductor through the transmission mechanism, the rotating conductor rotates, and when the rotating conductor rotates to the first preset position, the connection position is connected with the A-phase conductor; when the rotating conductor rotates to a second preset position, the connecting position is connected with the B-phase conductor; when the rotating conductor rotates to a third preset position, the connecting position is connected with the C-phase conductor; when the rotating conductor rotates to a fourth preset position, the connecting position and the A-phase conductor, the B-phase conductor and the C-phase conductor are in isolated fracture states. The rotating device realizes one-time withstand voltage test of the single-phase sleeve to the three-phase equipment, the position of any single-phase equipment is unique when being connected with the three-phase equipment, the air chamber in the shell does not need to charge and discharge protective gas for many times, and the rotating conductor can be switched randomly among states of being connected with the A-phase conductor, the B-phase conductor, the C-phase conductor and the three-phase conductor to form an isolation fracture through the driving force transmitted by the transmission mechanism. The problem that the three-phase box-shared GIS equipment cannot be tested due to limitation of height and space distance of a factory building when the three-phase box-shared GIS equipment is subjected to a voltage withstand test is solved, and the operation is simple and convenient.
Drawings
Fig. 1 is a schematic longitudinal sectional structural diagram of a conversion device for performing a withstand voltage test on a three-phase common-box GIS device according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structural diagram of a conversion device for performing a withstand voltage test on a three-phase common-box GIS device according to an embodiment of the present invention.
In the above figures 1 and 2 of the drawings,
the device comprises a shell 1, a first air-isolating insulator 2, a three-phase device 3, a second air-isolating insulator 4, a one-way device 5, a three-phase conductor 6, an A-phase conductor 61, a B-phase conductor 62, a C-phase conductor 63, a connecting conductor 7, a rotating conductor 8, a connecting position 9, a cover plate 10, a density relay 11, an adsorbent 12, an observation window 13, a shaft seal 14, an insulating transmission shaft 15, a first bevel gear 16, a second bevel gear 17, a manual crank arm 18 and a reducing cylinder 19.
Detailed Description
The core of the invention is to provide a conversion device for carrying out a voltage withstand test on three-phase box-shared GIS equipment, so as to solve the problems that the limitation of the height and the space distance of a factory building is easy to occur when the voltage withstand test is carried out on the three-phase box-shared GIS equipment, the test cannot be carried out, and the test mode is complicated in structure and inconvenient to operate.
In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and fig. 2, a conversion device for performing a voltage withstand test on a three-phase common-box GIS device according to an embodiment of the present invention includes a housing 1, an inner conductor and a transmission mechanism disposed in the housing 1; the shell 1 is provided with a first through hole and a second through hole which is coaxially arranged with the first through hole; the first port is connected with the three-phase equipment 3 through the first air-isolating insulator 2; the second through hole is connected with the one-way device 5 through a second air-insulated insulator 4; the inner conductor comprises a three-phase conductor 6 fixed on the first gas insulation rim 2, a connecting conductor 7 fixed on the second gas insulation rim 2 and a rotating conductor 8 rotatably arranged on the connecting conductor 7, wherein an A-phase conductor 61, a B-phase conductor 62 and a C-phase conductor 63 of the three-phase conductor 6 all fall on a rotating circumference taking the axis of the rotating conductor 8 as the center, and are generally and preferably uniformly arranged on the rotating circumference, and the tail end of the rotating conductor 8 is provided with a connecting position 9 transversely arranged; when the rotating conductor 8 rotates to a first preset position, the connection position 9 is connected with the A-phase conductor 61; when the rotating conductor 8 rotates to a second preset position, the connection position 9 is connected with the B-phase conductor 62; when the rotating conductor 8 rotates to a third preset position, the connecting position 9 is connected with the C-phase conductor 63; when the rotating conductor 8 rotates to a fourth preset position, the connection position 9 and the A-phase conductor 61, the B-phase conductor 62 and the C-phase conductor 63 are in an isolated fracture state; the transmission mechanism is used for transmitting the driving force required by the rotation of the rotary conductor 8.
In the practical application process of the conversion device, the external driving force is transmitted to the rotating conductor through the transmission mechanism, the rotating conductor rotates, and when the rotating conductor rotates to the first preset position, the connection position is connected with the A-phase conductor; when the rotating conductor rotates to a second preset position, the connecting position is connected with the B-phase conductor; when the rotating conductor rotates to a third preset position, the connecting position is connected with the C-phase conductor; when the rotating conductor rotates to a fourth preset position, the connecting position and the A-phase conductor, the B-phase conductor and the C-phase conductor are in isolated fracture states. The rotating device realizes one-time withstand voltage test of the single-phase sleeve to the three-phase equipment, the position of any single-phase equipment is unique when being connected with the three-phase equipment, the air chamber in the shell does not need to charge and discharge protective gas for many times, and the rotating conductor can be switched randomly among states of being connected with the A-phase conductor, the B-phase conductor, the C-phase conductor and the three-phase conductor to form an isolation fracture through the driving force transmitted by the transmission mechanism. The problem that the three-phase box-shared GIS equipment cannot be tested due to limitation of height and space distance of a factory building when the three-phase box-shared GIS equipment is subjected to a voltage withstand test is solved, and the operation is simple and convenient.
It should be noted that, in order to facilitate the butt joint of the second port and the unidirectional device, the corresponding shell 1 is provided with a reducing cylinder 19, and the second port is provided on the reducing cylinder 19. It should be noted that, as those skilled in the art will understand, the gas chamber refers to the area formed between two blind partitions in the GIS; the air-insulated insulator refers to an element that separates or supports the air chamber.
In some specific embodiments, in order to facilitate installation and maintenance of the connection conductor 7, the rotation conductor 8 and the three-phase conductor in the housing 1, a mounting opening and a cover plate 10 for cooperating with the mounting opening are further provided at the side of the housing 1, and it should be noted that, in order to ensure the tightness of the air chamber in the housing, the cooperation between the cover 10 and the mounting opening should be a tight and tight fit. It should be noted that, due to the isolation effect of the first air isolation flange and the second air isolation insulator, the air chamber structure in the shell of the conversion device is designed to be an independent air chamber, and when the air chamber needs to be emptied, the air chamber where the one-way device (here, generally, a single-phase voltage transformer) and the three-phase device (here, generally, a three-phase common-box GIS device) are located is not affected, so that the single-phase voltage transformer and the three-phase common-box GIS device are maintained.
In a further embodiment, in order to avoid the danger of the air chamber in the housing 1 due to the over-pressure, a density relay 11 for real-time monitoring of the air pressure condition of the air chamber in the housing 1 is provided on the cover plate 10.
In order to ensure that the micro-moisture content of the shielding gas (typically sulfur hexafluoride gas) in the converter is acceptable, an adsorbent 12 is typically arranged on the side of the cover plate 10 facing the installation opening. It is understood that the adsorbent may be disposed at other positions in the housing, but on the cover plate, so that the replacement is more convenient and faster.
In order to more conveniently determine the position of the connection position 9, a viewing window 13 for viewing the position of the connection position 9 is generally arranged on the side surface of the shell 1. It is understood that the above-mentioned determination of the position of the connection position through the observation window is only a preferred example of the embodiment of the present invention, and in practical applications, other arrangements may also be adopted, such as providing position indicators on the housing for the corresponding a-phase conductor contact, B-phase conductor contact and C-phase conductor contact, and providing a pointer on the corresponding portion of the transmission mechanism extending out of the housing, so that when the pointer is indicated at the corresponding position of the indicator, it can indicate that the pointer is in contact with the corresponding conductor.
In a further embodiment, the number of the observation windows 13 is preferably two, and the two observation windows 13 are arranged at 180 °. Therefore, double confirmation can be performed after the two observation windows are respectively used for observation, and the accuracy of confirming the position of the connecting position through the observation windows is further enhanced.
In some more specific embodiments, the specific structure of the transmission mechanism may include an insulated transmission shaft 15 rotatably disposed transversely on the housing 1 via a shaft seal 14, one end of the insulated transmission shaft 15 is located outside the housing 1, the other end of the insulated transmission shaft 15 is provided with a first bevel gear 16, and the rotating conductor 8 is provided with a second bevel gear 17 engaged with the first bevel gear 16. By driving the insulated transmission shaft 15 to rotate, the first bevel gear drives the second bevel gear to rotate, so that the rotating conductor rotates. It is understood that the above-mentioned transmission mechanism is only a preferred example of the embodiment of the present invention, and other transmission mechanisms, such as a sealed gear transmission structure or a hinge transmission structure, etc., commonly used by those skilled in the art may also be used in practical applications.
In addition, it should be noted that the driving mode of the insulating transmission shaft 15 may be manual driving, for example, one end of the insulating transmission shaft 15, which is located outside the housing 1, is provided with a manual crank arm 18, and the rotation of the insulating transmission shaft can be realized by manually shaking the manual crank arm, in a further embodiment, the outer side of the housing is further provided with a limiting mechanism, and the manual crank arm which rotates to a preset position can be positioned by the limiting mechanism, for example, a mode of a limiting pin and the like; the insulated transmission shaft may also be an automated equipment drive, such as a drive motor drive, in which case the end of the insulated transmission shaft 15 located outside the housing 1 is connected to a corresponding drive motor.
In a further embodiment, in order to realize the convenience of the rotation driving control of the insulated transmission shaft, a remote controller is also configured corresponding to the driving motor.
The conversion device for performing the withstand voltage test on the three-phase common-box GIS equipment provided by the invention is described in detail above. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The conversion device for carrying out the withstand voltage test on the three-phase common-box GIS equipment is characterized by comprising a shell (1), an inner conductor and a transmission mechanism, wherein the inner conductor and the transmission mechanism are arranged in the shell (1);
the shell (1) is provided with a first through hole and a second through hole which is coaxially arranged with the first through hole; the first port is connected with the three-phase equipment (3) through a first air-isolating insulator (2); the second through hole is connected with the one-way equipment (5) through a second air-insulated insulator (4);
the inner conductor comprises a three-phase conductor (6) fixed on the first gas insulation rim (2), a connecting conductor (7) fixed on the second gas insulation insulator (2) and a rotary conductor (8) rotatably arranged on the connecting conductor (7), wherein an A-phase conductor (61), a B-phase conductor (62) and a C-phase conductor (63) of the three-phase conductor (6) all fall on a rotary circumference taking the axis of the rotary conductor (8) as the center, and the tail end of the rotary conductor (8) is provided with a connecting position (9) which is transversely arranged;
when the rotating conductor (8) rotates to a first preset position, the connecting position (9) is connected with the A-phase conductor (61); when the rotating conductor (8) rotates to a second preset position, the connecting position (9) is connected with the B-phase conductor (62); when the rotating conductor (8) rotates to a third preset position, the connecting position (9) is connected with the C-phase conductor (63); when the rotating conductor (8) rotates to a fourth preset position, the connecting position (9) and the A-phase conductor (61), the B-phase conductor (62) and the C-phase conductor (63) are in isolated fracture states;
the transmission mechanism is used for transmitting the driving force required by the rotation of the rotating conductor (8).
2. The switching device for the withstand voltage test of the three-phase common box GIS equipment according to claim 1, characterized in that the side of the housing (1) is further provided with a mounting opening and a cover plate (10) for cooperating with the mounting opening.
3. The conversion device for the withstand voltage test of the three-phase common box GIS equipment according to claim 2 is characterized in that the cover plate (10) is provided with a density relay (11) for monitoring the air pressure condition of the air chamber in the shell (1) in real time.
4. The switching device for carrying out withstand voltage tests on three-phase common box GIS equipment according to claim 2, characterized in that the side of the cover plate (10) facing the mounting opening is further provided with an adsorbent (12).
5. The conversion device for the withstand voltage test of the three-phase common box GIS equipment according to the claim 1 is characterized in that the side of the shell (1) is also provided with an observation window (13) for observing the position of the connection position (9).
6. The conversion device for the withstand voltage test of the three-phase common-box GIS equipment according to claim 5 is characterized in that the number of the observation windows (13) is two, and the two observation windows (13) are arranged at 180 degrees.
7. The conversion device for the withstand voltage test of the three-phase common-box GIS equipment according to any one of claims 1 to 6, characterized in that the transmission mechanism comprises an insulated transmission shaft (15) rotatably arranged on the housing (1) transversely through a shaft seal (14), one end of the insulated transmission shaft (15) is located outside the housing (1), the other end of the insulated transmission shaft (15) is provided with a first bevel gear (16), and the rotating conductor (8) is provided with a second bevel gear (17) engaged with the first bevel gear (16).
8. The conversion equipment for the withstand voltage test of the three-phase common box GIS equipment according to the claim 7 is characterized in that one end of the insulated transmission shaft (15) outside the shell (1) is provided with a manual crank arm (18).
9. The conversion device for the withstand voltage test of the three-phase common box GIS equipment according to claim 7 is characterized in that one end of the insulated transmission shaft (15) located outside the shell (1) is connected with a driving motor.
10. The conversion device for the withstand voltage test of the three-phase common box GIS equipment according to claim 9, characterized in that the driving motor is further provided with a remote controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601074.5A CN111366818A (en) | 2018-12-26 | 2018-12-26 | Conversion device for carrying out withstand voltage test on three-phase box-shared GIS equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601074.5A CN111366818A (en) | 2018-12-26 | 2018-12-26 | Conversion device for carrying out withstand voltage test on three-phase box-shared GIS equipment |
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| CN111366818A true CN111366818A (en) | 2020-07-03 |
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| CN201811601074.5A Pending CN111366818A (en) | 2018-12-26 | 2018-12-26 | Conversion device for carrying out withstand voltage test on three-phase box-shared GIS equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636230A (en) * | 2020-12-07 | 2021-04-09 | 河南平高电气股份有限公司 | Transition bus for GIS and GIS |
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| 胡庆生: "《现代电气工程实用技术手册 上》", 31 October 1994 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636230A (en) * | 2020-12-07 | 2021-04-09 | 河南平高电气股份有限公司 | Transition bus for GIS and GIS |
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Application publication date: 20200703 |