CN104348107A - All condition intelligent armored moving-type alternating current metal closed switch equipment - Google Patents
All condition intelligent armored moving-type alternating current metal closed switch equipment Download PDFInfo
- Publication number
- CN104348107A CN104348107A CN201410701204.8A CN201410701204A CN104348107A CN 104348107 A CN104348107 A CN 104348107A CN 201410701204 A CN201410701204 A CN 201410701204A CN 104348107 A CN104348107 A CN 104348107A
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- CN
- China
- Prior art keywords
- phase
- intelligent
- type alternating
- breaker
- main bus
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/202—Cable lay-outs
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/21—Bus-bar arrangements for rack-mounted devices with withdrawable units
Abstract
The invention discloses all condition intelligent armored moving-type alternating current metal closed switch equipment. The equipment comprises a cabinet body and a low-pressure instrument chamber, a vacuum breaker chamber, a cable mounting chamber and a main bus chamber which are distributed on the cabinet body, wherein the main bus chamber is arranged at the rear upper part of the cabinet body and is provided with a middle insulating conduit; a vacuum breaker is arranged in the vacuum breaker chamber; a current transformer and an earthing switch are arranged in the cable mounting chamber; a second component for controlling and protecting is arranged in the low-pressure instrument chamber. The all condition intelligent armored moving-type alternating current metal closed switch equipment has the advantages of being reasonable in structure layout, high in reliability, high in intelligent degree and wide in application range.
Description
Technical field
The present invention is mainly concerned with field of switch equipment, refers in particular to a kind of armored withdraw type high-voltage alternating metal enclosed switchgear.
Background technology
Armored withdraw type high-voltage alternating metal enclosed switchgear is widely used in the industry such as electric power system and railway, petrochemical industry, metallurgy, industrial and mining enterprises and skyscraper.At present, applying more product is high-voltage alternating metal enclosed switchgear based on air insulation.But be that the high-voltage alternating metal enclosed switchgear of main insulation is due to more responsive to ambient air quality with air, particularly under, the rugged environment pollutional condition such as pollution severity and etchant gas moister at air ratio, insulation fault often occurs, almost more than 50% of switch cubicle rate of failure be to account for, safe operation and the power supply quality of electric power system had a strong impact on.
Because China occupies six kinds of climatic provinces of nine kinds of climate types classification in the world, comprise damp and hot, sub-damp and hot, warm temperature, cold temperature, cold, xeothermic; Have distinctive high altitude localities, height above sea level accounts for 33% of area more than the high original area of 2000m; Height above sea level reaches 58% more than the area of 1000m, has 1800 kilometers to cross over the damp and hot coastline taking cold area to; Offshore and the petroleum resources with 4,700,000 square kilometres contain the abundant Takla Makan Desert, under therefore the high voltage switchgear more than 60% of China all operates in special environmental requirement.Thus the occasion of and the natural environment such as underground, plateau, coastal area and condition rather harsh high at reliability requirement, armored withdraw type high-voltage alternating metal enclosed switchgear traditional at present all can not adapt to mostly.As adopted the gas isolated switch cubicle of SF6, expensive first, second SF6 gas is as one of six kinds of warm and humid gases, and environmental pollution has larger impact, and therefore China's regulation need not or be used less.
In addition, the basis of current high-voltage alternating metal enclosed switchgear is developed have and can meet safe operation under full working scope condition, can reach again miniaturized, that non-maintaining high voltage switchgear is high voltage switchgear main development direction, be one of important means reducing power system security accident.Meanwhile, along with the construction of intelligent grid, the development of intelligent building, wisdom community, proposes the challenge of renewal to the development of associate power equipment and technical merit.Such as, how to improve the intelligent level of switchgear, use Modern Transducer Technology, microprocessing and condition monitoring and fault diagnosis technology, significantly improve the reliability of switchgear, automation and intelligentized level, make high voltage switchgear can safe operation in the presence of a harsh environment, have again intellectuality, non-maintaining function, these have become a High-voltage Switchgear Industry difficult problem anxious to be resolved all simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is just: the technical problem existed for prior art, the invention provides the intelligent armoured removable type alternating of full working scope that a kind of topology layout is reasonable, reliability is high, applied widely.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
The intelligent armoured removable type alternating of a kind of full working scope; comprise cabinet and be distributed in low pressure control room on cabinet, vacuum interrupter chamber, cable installation room, main bus bar room; described main bus bar room is installed on the upper back of cabinet and installs intermediate insulation conduit; described vacuum circuit-breaker indoor are provided with vacuum circuit-breaker; in described cable installation room, current transformer and earthed switch are installed, the secondary component of Control protection is installed in described low pressure control room.
As a further improvement on the present invention: described cabinet has eight blocks of functional compartments plates: the first decompression function plate, the second decompression function plate, the 3rd decompression function plate, low-pressure chamber panel, breaker chamber panel, cable vault's panel, rear lower door-plate and upper Rear Door.
As a further improvement on the present invention: A, B, C three-phase main bus bar encapsulated by electric insulation sheath that described intermediate insulation tubes connection has three-phase prefabricated, and to carry out centre respectively by three insulators fixing and support; Three-phase main bus bar is connected with the quiet conducting end in three-phase upper static contact box respectively by A, B, C three-phase separate bus.
As a further improvement on the present invention: the bottom of described vacuum circuit-breaker is provided with the electric chassis truck with vacuum circuit-breaker motion.
As a further improvement on the present invention: described vacuum circuit-breaker indoor are provided with insulation valve and valve mechanism for opening/closing, insulation valve is by the control operation of valve mechanism for opening/closing.
As a further improvement on the present invention: the one end of the three-phase inferior division bus in described cable installation room is fixed under three-phase in fixed contact box, and the other end and three-phase (or two-phase) current transformer are electrically connected; The leading-out terminal of described current transformer is connected with outlet three-phase branch busbar, and the other end of described outlet three-phase branch busbar is by sensor support; Described outlet three-phase branch busbar is fixed with threephase cable outlet pile crown and three-phase ground pile crown, and cable end is connected with threephase cable outlet pile crown.
As a further improvement on the present invention: described low-pressure chamber panel is provided with intelligent protection supervising device and switchgear Intelligent control device.
Compared with prior art, the invention has the advantages that:
1, the intelligent armoured removable type alternating of full working scope of the present invention, total is more simple, layout is more reasonable, greatly can improve reliability and the fail safe of whole switchgear, provides its adaptive capacity under bad working environments.
2, the intelligent armoured removable type alternating of full working scope of the present invention, have employed the intelligent pole type vacuum circuit breaker of full working scope, solve former insulation weak link, effectively improve the insulation level of whole switchgear, and the width of switch cubicle can be reduced, reach miniaturized.
3, the intelligent armoured removable type alternating of full working scope of the present invention, bus-bar system adopts compound inslation technology, main bus bar and branch bar, connecting portion all adopt electric insulation sheath to encapsulate, effectively ensure that insulation level, thus whole major loop can safe operation under any severe environmental conditions.
4, the intelligent armoured removable type alternating of full working scope of the present invention, the bottom of vacuum circuit-breaker is provided with electric chassis truck, and this chassis vehicle and earthed switch are electric operating, both can manual operation on the spot, also can a distant place control.The mounting means of vacuum circuit-breaker adopt mid-can withdraw-type install, be beneficial to circuit breaker failure situation under quick-replaceable, ensure the continuity that switch cubicle is powered.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present invention.
Fig. 2 is backsight structural representation of the present invention.
Fig. 3 is the left TV structure schematic diagram after the present invention removes shrouding.
Fig. 4 is the main TV structure schematic diagram after the present invention removes breaker chamber panel.
Fig. 5 is the sectional structure schematic diagram in cross section of the present invention.
Marginal data:
1, cabinet; 2, intermediate insulation conduit; 3, ground connection action bars; 4, insulate valve; 5, valve mechanism for opening/closing; 6, electric chassis truck; 7, transducer; 8, cable end; 9, earthed switch; 10, Earth pile-head; 11, cable outlet pile crown; 12, outlet three-phase branch busbar; 13, current transformer; 14, inferior division bus; 15, lower fixed contact box; 16, upper static contact box; 17, C phase main bus bar; 18, C phase branch bar; 19, A phase branch bar; 20, B phase branch bar; 21, A phase main bus bar; 22, B phase main bus bar; 23, insulator; 101, low pressure control room; 102, vacuum interrupter chamber; 103, cable installation room; 104, main bus bar room; 105, the first decompression function plate; 106, the second decompression function plate; 107, the 3rd decompression function plate; 108, low-pressure chamber panel; 109, breaker chamber panel; 110, cable vault's panel; 111, rear lower door-plate; 112, upper Rear Door; 201, intelligent protection supervising device; 202, switchgear Intelligent control device.
Embodiment
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
As shown in Fig. 1 ~ Fig. 5, the intelligent armoured removable type alternating of full working scope of the present invention, comprise cabinet 1 and be distributed in four functional compartments on cabinet 1, that is: low pressure control room 101, vacuum interrupter chamber 102, cable installation room 103, main bus bar room 104.Whole cabinet 1 has eight blocks of functional compartments plates: the first decompression function plate 105, second decompression function plate 106, the 3rd decompression function plate 107, low-pressure chamber panel 108, breaker chamber panel 109, cable vault's panel 110, rear lower door-plate 111 and upper Rear Door 112, enclosed by functional compartments plate and define a complete cabinet 1.
In the preferred embodiment, the first decompression function plate 105, second decompression function plate 106, the 3rd decompression function plate 107, breaker chamber panel 109, cable vault's panel 110 are all Explosion-proof Designs, the injury to the person when effectively can ensure inner arcing fault.On cabinet 1 except each panel and pressure relief plate, all adopt and cover aluminium zinc steel plate and process after multiple bending through CNC machine and assemble, ensure that consistency and the machining accuracy of cabinet 1, be convenient to large batch of production simultaneously.
Main bus bar room 104 is installed on the upper back of cabinet 1.
In the present embodiment, the secondary component of Control protection can be installed in the low pressure control room 101 that low-pressure chamber panel 108 blocks.
In the present embodiment, top in main bus bar room 104 becomes the Chinese character pin-shaped intermediate insulation conduit 2 being arranged with three-phase main bus bar, intermediate insulation conduit 2 is connected with three-phase prefabricated the C phase main bus bar 17 encapsulated by electric insulation sheath, A phase main bus bar 21, B phase main bus bar 22, and it is fixing and support to carry out centre respectively by three insulators 23.Main bus bar is connected with the quiet conducting end in three-phase upper static contact box 16 by C phase branch bar 18, A phase branch bar 19, B phase branch bar 20.The mode that electrical connection position adopts plane to connect, the continuity that ensure that electrical connection.Junction adopts the carrying out of electric insulation sheath to encapsulate equally, ensure that the insulating reliability of junction.
In the present embodiment, be provided with vacuum circuit-breaker 209 in vacuum interrupter chamber 102, vacuum circuit-breaker 209 can be seesawed by the electric chassis truck 6 of bottom in switch cubicle, reaches isolation, test, work three positions.Vacuum circuit-breaker 209 is when service position, and the moving contact of upper and lower contact arm is connected with the fixed contact of lower fixed contact box 15, upper static contact box 16 respectively.
In the present embodiment, be provided with insulation valve 4 and valve mechanism for opening/closing 5 in vacuum interrupter chamber 102, when vacuum circuit-breaker 209 enters service position from test position, by the control of valve mechanism for opening/closing 5, insulation valve 4 is opened automatically; When vacuum circuit-breaker 209 exits test position from service position, by the control of valve mechanism for opening/closing 5, insulation valve 4 is closed automatically, has effectively isolated major loop live part, ensure that the safety safeguarded and overhaul.
In the present embodiment, vacuum circuit-breaker 209 is the intelligent pole type circuit breaker of full working scope of independent design, be installed on the front middle part of cabinet 1, the bottom of vacuum circuit-breaker 209 is provided with the electric chassis truck 6 passed in and out for vacuum circuit-breaker 209, and manually rocking handle or electric motor operated can make the forward and backward operation of vacuum circuit-breaker 209.In the preferred embodiment, electric chassis truck 6 is configured with " five-defence block " part of various routine, realizes " five-defence block " function easily.
In the present embodiment, be provided with current transformer 13 and earthed switch 9 in cable installation room 103, current transformer 13 can fill two-phase or three-phase.Replace supporting with insulating element when filling two-phase, simultaneously for installing cables head 8.Earthed switch 9 manually divides by ground connection action bars 3, combined floodgate use, also carries out electric operating by motor.The ground connection action bars 3 of earthed switch 9 is provided with " five prevent " function latching member, the locking of switch 9 and vacuum circuit-breaker 209, earthed switch 9 and front/rear door can be grounded.One end of inferior division bus 14 in cable installation room 103 is fixed in lower fixed contact box 15, and the other end and current transformer 13 are electrically connected.The leading-out terminal of current transformer 13 is connected with outlet three-phase branch busbar 12, and the other end of outlet three-phase branch busbar 12 is supported by charged display transducer 7, and transducer 7 charged signal is uploaded to actuation means.
Outlet three-phase branch busbar 12 is fixed with cable outlet pile crown 11 and Earth pile-head 10, and during in-site installation, cable end 8 is connected with cable outlet pile crown 11.When vacuum circuit-breaker 209 overhauls at open position, after the earthed switch 9 that closes; earthed switch 9 is connected with Earth pile-head 10 on major loop; now whole cable installation room 103 and current transformer 13 and pressure releasing chamber are all in good ground state; effectively can prevent the anti-power transmission of user or misdelivery electricity, thus reach the security purpose of the protection person better.
Pole under C phase main bus bar 17, A phase main bus bar 21, B phase main bus bar 22, C phase branch bar 18, A phase branch bar 19, B phase branch bar 20, three-phase on the fixed contact of fixed contact box 15 and three-phase upper static contact box 16, vacuum circuit-breaker 209, three-phase inferior division bus 14, threephase current transformer 13, three-phase outlet branch busbar 12, threephase cable outlet pile crown 11, three-phase electricity cable end 8 are connected, thus define complete major loop.All exposed conductive parts adopt electric insulation sheath to encapsulate, and condensation and filth etc. can be prevented the impact of major loop, effectively ensure that insulation level.With the combination of full working scope type vacuum circuit-breaker, define complete switchgear.As from the foregoing, the major loop of switchgear of the present invention is all insulation, therefore can safe operation under any severe environmental conditions.
Further, in the present embodiment, on low-pressure chamber panel 108, intelligent protection supervising device 201 is installed, low-pressure chamber panel 108 is also provided with switchgear Intelligent control device 202 simultaneously.Former circuit breaker intelligent controller intelligent functions has all been integrated on intelligent protection supervising device 201 by intelligent protection supervising device 201; intelligent protection supervising device 201 mainly realizes defencive function and the distant place communication of switchgear and circuit; comprise the intelligent functions of vacuum circuit-breaker 209, as: the setting parameter, life-span monitoring, overtravel monitoring, the monitoring of divide-shut brake circuit breaking etc. of the vacuum degree on-line monitoring of vacuum circuit-breaker 209, the mechanical property on-line monitoring of vacuum circuit-breaker 209, vacuum circuit-breaker 209.Even can also comprise: motor protection function in electric chassis truck 6 and earthed switch 9; distant place vacuum circuit-breaker 209 points, combined floodgate; the electronic turnover in electric chassis truck 6 distant place, earthed switch 9 distant place divide, closing function, and whole switchgear and vacuum circuit-breaker 209 run temperature rise monitoring and defencive function.The present invention by former dispersion independently intelligent cell all focus on one and not only reduce manufacturing cost on the whole, unified communication interface, simplified installation simultaneously, for the intellectuality of whole switchgear creates condition.The function of breaker in middle device intelligence actuation means 202 of the present invention comprises: the display of the humiture of whole switchgear and controls, switchgear HV live displaying, control with remote operation on the spot, the display of divide-shut brake supply voltage, state simulation amount and the function such as electric parameter measurement, " five is anti-" function voice message such as vacuum circuit-breaker 209 and earthed switch 9 position display.As from the foregoing; the present invention has carried out the clear and definite division of labor for above-mentioned stream oriented device; utilize the unification of stream oriented device; make switchgear clear and definite with the division of labor of distant place control and protection on the spot; perfect in shape and function; and don't overlapping, considerably reduce manufacture and various design cost, lay a good foundation for intellectualized switchgear moves towards market.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as protection scope of the present invention.
Claims (7)
1. the intelligent armoured removable type alternating of full working scope, it is characterized in that, comprise cabinet (1) and be distributed in the low pressure control room (101) on cabinet (1), vacuum interrupter chamber (102), cable installation room (103), main bus bar room (104), described main bus bar room (104) is installed on the upper back of cabinet (1) and installs intermediate insulation conduit (2), vacuum circuit-breaker (209) is installed in described vacuum interrupter chamber (102), current transformer (13) and earthed switch (9) are installed in described cable installation room (103), the secondary component of Control protection is installed in described low pressure control room (101).
2. the intelligent armoured removable type alternating of full working scope according to claim 1, it is characterized in that described cabinet (1) having eight blocks of functional compartments plates: the first decompression function plate (105), the second decompression function plate (106), the 3rd decompression function plate (107), low-pressure chamber panel (108), breaker chamber panel (109), cable vault's panel (110), rear lower door-plate (111) and upper Rear Door (112).
3. the intelligent armoured removable type alternating of full working scope according to claim 1, it is characterized in that, described intermediate insulation conduit (2) is connected with three-phase prefabricated the C phase main bus bar (17) encapsulated by electric insulation sheath, A phase main bus bar (21), B phase main bus bar (22), and it is fixing and support to carry out centre respectively by three insulators (23); Three-phase main bus bar is connected with the quiet conducting end in three-phase upper static contact box (16) respectively by C phase branch bar (18), A phase branch bar (19), B phase branch bar (20).
4. the intelligent armoured removable type alternating of full working scope according to claim 1, is characterized in that, the bottom of described vacuum circuit-breaker (209) is provided with the electric chassis truck (6) moved with vacuum circuit-breaker (209).
5. the intelligent armoured removable type alternating of full working scope according to claim 4, it is characterized in that, be provided with insulation valve (4) and valve mechanism for opening/closing (5) in described vacuum interrupter chamber (102), insulation valve (4) controls operation by valve mechanism for opening/closing (5).
6. the intelligent armoured removable type alternating of full working scope according to claim 1, it is characterized in that, the one end of three-phase inferior division bus (14) in described cable installation room (103) is fixed under three-phase in fixed contact box (15), and the other end and three-phase or two-phase current instrument transformer (13) are electrically connected; The leading-out terminal of described current transformer (13) is connected with outlet three-phase branch busbar (12), and the other end of described outlet three-phase branch busbar (12) is supported by three phase (7); Described outlet three-phase branch busbar (12) is fixed with threephase cable outlet pile crown (11) and three-phase ground pile crown (10), cable end (8) is connected with threephase cable outlet pile crown (11).
7. according to the intelligent armoured removable type alternating of the full working scope in claim 2 ~ 6 described in any one; it is characterized in that, described low-pressure chamber panel (108) is provided with intelligent protection supervising device (201) and switchgear Intelligent control device (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410701204.8A CN104348107A (en) | 2014-11-28 | 2014-11-28 | All condition intelligent armored moving-type alternating current metal closed switch equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410701204.8A CN104348107A (en) | 2014-11-28 | 2014-11-28 | All condition intelligent armored moving-type alternating current metal closed switch equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104348107A true CN104348107A (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410701204.8A Pending CN104348107A (en) | 2014-11-28 | 2014-11-28 | All condition intelligent armored moving-type alternating current metal closed switch equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104348107A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917091A (en) * | 2015-07-09 | 2015-09-16 | 新疆特变电工自控设备有限公司 | Plateau type intelligent withdrawable alternating-current metal-enclosed switchgear |
| CN105070582A (en) * | 2015-08-12 | 2015-11-18 | 江苏南瑞泰事达电气有限公司 | 12/24kV indoor high-voltage vacuum circuit breaker |
| CN105070581A (en) * | 2015-08-12 | 2015-11-18 | 江苏南瑞泰事达电气有限公司 | 40 kV indoor high-voltage vacuum circuit breaker |
| CN105098639A (en) * | 2015-07-28 | 2015-11-25 | 江苏南瑞泰事达电气有限公司 | 40kV switch cabinet |
| CN105098641A (en) * | 2015-08-28 | 2015-11-25 | 南通市泰力普电气有限公司 | High-voltage switch cabinet |
| CN110491719A (en) * | 2019-09-28 | 2019-11-22 | 侨融电子科技有限公司 | A kind of numerical control mine flameproof and intrinsic safety type vacuum combination feeding switch |
| CN111416285A (en) * | 2020-04-10 | 2020-07-14 | 袁宝庆 | High-low voltage switch cabinet with vacuum degree |
| CN112415236A (en) * | 2020-11-17 | 2021-02-26 | 山西太钢不锈钢股份有限公司 | Cable switching pre-test method |
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| CN204216474U (en) * | 2014-11-28 | 2015-03-18 | 湖南长高高压开关集团股份公司 | The intelligent armoured removable type alternating of a kind of full working scope |
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| CN202127191U (en) * | 2011-01-12 | 2012-01-25 | 宁夏力成电气集团有限公司 | 12 kV armoured slide-to-open type metal seal switch device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917091A (en) * | 2015-07-09 | 2015-09-16 | 新疆特变电工自控设备有限公司 | Plateau type intelligent withdrawable alternating-current metal-enclosed switchgear |
| CN105098639A (en) * | 2015-07-28 | 2015-11-25 | 江苏南瑞泰事达电气有限公司 | 40kV switch cabinet |
| CN105070582A (en) * | 2015-08-12 | 2015-11-18 | 江苏南瑞泰事达电气有限公司 | 12/24kV indoor high-voltage vacuum circuit breaker |
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| CN105098641A (en) * | 2015-08-28 | 2015-11-25 | 南通市泰力普电气有限公司 | High-voltage switch cabinet |
| CN110491719A (en) * | 2019-09-28 | 2019-11-22 | 侨融电子科技有限公司 | A kind of numerical control mine flameproof and intrinsic safety type vacuum combination feeding switch |
| CN111416285A (en) * | 2020-04-10 | 2020-07-14 | 袁宝庆 | High-low voltage switch cabinet with vacuum degree |
| CN112415236A (en) * | 2020-11-17 | 2021-02-26 | 山西太钢不锈钢股份有限公司 | Cable switching pre-test method |
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Application publication date: 20150211 |
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