CN109494605B - Device with double main bus isolation function - Google Patents
Device with double main bus isolation function Download PDFInfo
- Publication number
- CN109494605B CN109494605B CN201811560223.8A CN201811560223A CN109494605B CN 109494605 B CN109494605 B CN 109494605B CN 201811560223 A CN201811560223 A CN 201811560223A CN 109494605 B CN109494605 B CN 109494605B
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- chain wheel
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- double
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- 238000002955 isolation Methods 0.000 title claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 82
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 description 5
- 239000012212 insulator Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0352—Gas-insulated switchgear for three phase switchgear
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a device with double main bus isolation functions, which comprises a front inflatable compartment and a rear inflatable compartment, wherein the front inflatable compartment and the rear inflatable compartment are electrically connected through a bus connector; a rear air chamber operating mechanism and a front transmission device are arranged in front of a front inflating compartment, a rear transmission device is arranged on the back of the rear inflating compartment, the rear air chamber operating mechanism drives the rear transmission device to act through the front transmission device and a transmission element penetrating through the front inflating compartment and the rear inflating compartment, and the functions of closing, isolating and grounding of a rear three-station isolating switch are achieved through the rear transmission device. The invention has the characteristics of small occupied area, high reliability and good insulating property in the gas tank.
Description
Technical Field
The invention relates to the technical field of switch equipment, in particular to a device with a double-main-bus isolation function.
Background
The three-station isolating switch is an important component of the switch cabinet, is usually installed inside the switch cabinet, and is isolated from other running electrical equipment during maintenance or standby electrical equipment, so that the safety of maintenance work is ensured. A gas insulated switchgear is a high and new technology product in the field of medium voltage switches, the voltage class is generally 12-40.5 kV, the short circuit current tolerance is generally below 40kA, high voltage elements such as a circuit breaker, a disconnecting switch, an earthing switch and the like are arranged in a sealed metal cabinet body and filled with low-pressure SF6And gas or other insulating gas is used as an insulating medium, so that the isolation from the external environment is realized, and the stability of the operation of the switch cabinet is improved.
The existing double-main-bus isolation function is generally realized by splicing 2 switch cabinets left and right, a breaker, a three-station isolating switch, a wire inlet sleeve, a bus sleeve, a main bus bar, a branch bus bar and other parts are arranged in a switch cabinet gas box, an isolation mechanism is arranged on the front surface of the gas box, and the operation mechanism drives a lead screw to move so as to realize the functions of grounding, isolation and switching on. And the other switch cabinet gas box is internally provided with a three-station isolating switch, a wire inlet sleeve, a bus sleeve, a main bus, a branch bus and other parts, and the design of the frame and the gas box ensures that the height of the bus is consistent with that of the first switch cabinet. The structure can realize the isolation function of two sections of buses, but a switch cabinet is specially equipped, so that the cost is higher.
In addition, the existing device with the double-main-bus isolation function is realized by splicing one gas tank behind 1 gas tank of the switch cabinet, three-station isolation switches are arranged in front and back 2 gas tanks, a front air chamber operating mechanism is arranged right in front of the front gas tank, and the three-station isolation switches in the front gas tank are closed, isolated and grounded through the front air chamber operating mechanism. The rear air chamber operating mechanism is arranged on the back of the rear air box, and the three-station isolating switch in the rear air box is switched on, isolated and grounded through the rear air chamber operating mechanism. Because the existing device with the double-main-bus isolation function is used for installing the rear air chamber operating mechanism on the back of the rear air box, the working space of an operator needs to be reserved, and the occupied area is large. In addition, the interlocking device of the front air chamber operating mechanism and the rear air chamber operating mechanism of the existing device with the double-main bus isolation function has a complex structure, and the operating interfaces are not positioned in the same area, so that the operation is inconvenient, the position indication is unreasonable, and accidents caused by misoperation occur seriously
Disclosure of Invention
The invention aims to solve the technical problems that aiming at realizing the isolation function of 2-section buses at present, an isolation cabinet needs to be specially designed, the amount of matched components and metal sheet metal parts is large, and the economy is poor. The switch cabinet realizes 2 bus isolation functions, the operating mechanism is installed on the back of the switch cabinet, the occupied space is large, the safety is not high, the operation and maintenance are not convenient, and the like, so that the device with the double main bus isolation functions, which is formed by arranging the front air chamber operating mechanism and the rear air chamber operating mechanism in front of the front air box, is provided. The device has the advantages of simple and convenient operation, small occupied space, high safety and convenient operation and maintenance.
The technical problem to be solved by the invention can be realized by the following technical scheme:
a device with double main bus isolation functions comprises a front inflating compartment and a rear inflating compartment, wherein the front inflating compartment and the rear inflating compartment are electrically connected through a bus connector; the three-station isolation switch is characterized in that a rear air chamber operating mechanism and a front transmission device are installed in front of the front inflatable compartment, a rear transmission device is installed on the back of the rear inflatable compartment, the rear air chamber operating mechanism drives the rear transmission device to act through the front transmission device and a transmission element penetrating through the front inflatable compartment and the rear inflatable compartment, and the functions of closing, isolating and grounding of a rear three-station isolation switch are achieved through the rear transmission device.
In a preferred embodiment of the invention, the front three-position isolating switch and the rear three-position isolating switch are coaxially arranged.
In a preferred embodiment of the present invention, the transmission element comprises a transmission sleeve and a transmission shaft, the transmission sleeve passes through the front inflation compartment and the rear inflation compartment and is welded with the front and rear air box plates of the front inflation compartment and the front and rear air box plates of the rear inflation compartment; the transmission shaft penetrates through the transmission sleeve; the front end of the transmission shaft is in driving connection with the front transmission device, and the rear end of the transmission shaft is in driving connection with the rear transmission device.
In a preferred embodiment of the invention, the driving bushings are located at the bottom of the front inflatable compartment and the rear inflatable compartment.
In a preferred embodiment of the present invention, the front transmission device comprises a front bracket, a first chain wheel and a first double-chain wheel, the front bracket is fixed on the front air box plate of the front inflation air chamber, the front end of the transmission shaft is arranged on the front bracket in a shaft mode, the first chain wheel is arranged on the front end of the transmission shaft in a key mode, and the first double-chain wheel is arranged on the front bracket in a shaft mode; an output chain wheel in the rear air chamber operating mechanism is in power connection with a driving chain wheel in the first double-chain wheel through a first chain, and a driven chain wheel in the first double-chain wheel is in power connection with the first chain wheel through a second chain; the rear air chamber operating mechanism drives the transmission shaft to rotate through the output chain wheel, the first chain, the first double-chain wheel, the second chain and the first chain wheel.
In a preferred embodiment of the present invention, the rear transmission device includes a rear bracket, a rear bracket bent plate, a second sprocket, a second double-chain sprocket, and a third sprocket, the rear bracket and the rear bracket bent plate are fixed on the rear air box plate of the rear inflation compartment, the rear end of the transmission shaft is pivotally provided on the rear bracket, the second sprocket is keyed on the rear end of the transmission shaft, and the second double-chain sprocket and the third sprocket are pivotally provided on the rear bracket bent plate; the second chain wheel is in power connection with a driving chain wheel in the second double-chain wheel through a third chain, a driven chain wheel in the second double-chain wheel is in power connection with the third chain wheel through a fourth chain, and the third chain wheel is in power connection with a rod in the rear three-station isolating switch; the transmission shaft drives a rod in the rear three-station isolating switch to rotate through a second chain wheel, a third chain, a second double-chain wheel, a fourth chain and a third chain wheel, and the closing, isolating and grounding functions of the rear three-station isolating switch are realized.
In a preferred embodiment of the invention, the front end of the transmission shaft is arranged on the front bracket through a front deep groove ball bearing and a front bearing bush shaft, and the rear end of the transmission shaft is arranged on the rear bracket through a rear deep groove ball bearing and a bearing bush shaft.
By adopting the technical scheme, the invention adopts the splicing of the front inflating air chamber and the rear inflating air chamber, the air box seal and the transmission structure of the transmission element which penetrates through the front inflating air chamber and the rear inflating air chamber from front to back, and the operation mode of the rear three-position isolating switch in the rear inflating air chamber is transmitted to the front operation of the cabinet through the transmission element, so that the invention has the characteristics of small occupied area, high reliability and good insulating property in the air box.
Compared with the prior art, the invention has the following characteristics:
1. the front three-station isolating switch and the rear three-station isolating switch are respectively and hermetically arranged in the front inflating air chamber and the rear inflating air chamber which are independent, insulating gas is filled in the front inflating air chamber and the rear inflating air chamber to realize gas insulation, the normal use is not influenced by the environment, and the use reliability is greatly improved;
2. the front three-position isolating switch and the rear three-position isolating switch adopt coaxial electric field design structures, so that the insulating capability of a broken opening is improved, and the use of a switch cabinet with high insulating requirements is met;
3. the hollow transmission sleeves are designed at the bottoms of the front inflation air chamber and the rear inflation air chamber, so that the electric field is uniformly distributed, and the air chamber tightness is not influenced. The transmission shaft can run through the transmission sleeve, and front operation of the front and rear three-station isolating switches can be realized.
4. The front-mounted inflating air chamber and the rear-mounted inflating air chamber are electrically connected through a bus connector and can be spliced with a whole set of arranged gas insulation switch cabinets.
The three-position switch can be applied to the field of medium-voltage gas insulated switch cabinets, two sets of three-position isolating switches are configured on one switch cabinet, the two sections of buses have the bus isolating function, the three-position switches are good in insulating performance, normal and short-circuit currents can be borne, and the reliability of operation of the switch cabinet is guaranteed. According to the design of the principle of the invention, the operating mechanism has simple transmission structure, high transmission efficiency and improved action reliability; the operating mechanism is arranged right in front of the switch cabinet, so that operation and maintenance personnel can conveniently operate and maintain on site, and the occupied space for operating the switch cabinet is reduced. Only a small air box with a three-position isolating switch is added behind the existing switch cabinet, so that the manufacturing cost of the switch cabinet is saved.
Compared with the conventional bus sectional isolation cabinet, the invention only needs to splice a small air box provided with the three-station isolation switch at the back of the switch cabinet, does not need to manufacture a whole cabinet to realize the isolation of double buses, saves the use of metal shells and components and has lower manufacturing cost. The specifications of the two sections of buses are not uniform, and the main buses of the switch cabinet with different specifications can be connected through the replacement of the main bus connecting device, so that the standardization and the universal design are realized, and the production and management cost is effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of a switchgear to which the apparatus with dual main bus isolation function of the present invention is applied.
Fig. 2 is a structural sectional view of a front and rear three-position disconnecting switch in the device with the double-main bus isolation function.
FIG. 3 is a schematic connection diagram of the rear air chamber operating mechanism, the front transmission device, the transmission shaft and the rear transmission device in the device with the dual main bus isolation function according to the present invention.
Fig. 4 is an enlarged schematic view of a portion a of fig. 3.
Fig. 5 is an enlarged schematic view of fig. 3 at B.
Detailed Description
The invention is further described below in conjunction with the appended drawings and detailed description.
Referring to fig. 1, the apparatus with dual main bus isolation function shown in the figure is applied to a switch cabinet, and includes a front inflatable compartment 100 and a rear inflatable compartment 200, where the front inflatable compartment 100 and the rear inflatable compartment 200 are filled with insulating gas through self-sealing valves of the front inflatable compartment 100 and the rear inflatable compartment 200.
The front inflating compartment 100 and the rear inflating compartment 200 are electrically connected by a bus bar connector 300.
The front three-position isolating switch 400 and the rear three-position isolating switch 500 are respectively arranged in the front inflating compartment 100 and the rear inflating compartment 200, the front three-position isolating switch 400 and the rear three-position isolating switch 500 are coaxially arranged, and the front three-position isolating switch 400 and the rear three-position isolating switch 500 adopt coaxial electric field design structures, so that the fracture insulating capability is improved, and the use of a switch cabinet with high insulating requirements is met.
Referring to fig. 2, each of the front three-position disconnecting switch 400 and the rear three-position disconnecting switch 500 includes a stationary contact 410, 510, a contact tube 420, 520, a movable contact 430, 530, a rod 440, 540, a lead screw 450, 550, a lead screw nut 460, 560, an insulator 470, 570, and a mounting plate 480, 580. The stationary contact bases 410, 510 are connected with the insulators 470, 570 by screws, the insulators 470, 570 are connected with the mounting plates 480, 580, the mounting plate 480 of the front three-position disconnecting switch 400 is fixed on the rear air box plate 110 of the front inflating compartment 100 by fasteners, and the mounting plate 580 of the rear three-position disconnecting switch 500 is fixed on the front air box plate 210 of the rear inflating compartment 200 by fasteners. The insulators 470 and 570 have the function of isolating high and low potentials.
The moving contacts 430 and 530 are respectively arranged in the contact tubes 420 and 520 in a sliding mode, the screw rod nuts 460 and 560 are respectively arranged in the moving contacts 430 and 530, one ends of the screw rods 450 and 550 are respectively meshed with the screw rod nuts 460 and 560, the other ends of the screw rods 450 and 550 are respectively connected with the rods 440 and 540 through the positioning pins, the screw rods 450 and 550 can be driven to rotate through the rotating rods 440 and 540, the rotating screw rods 450 and 550 drive the moving contacts 430 and 530 to perform linear motion through the screw rod nuts 460 and 560, and the functions of three-station isolation switch closing, isolation and grounding are achieved.
The front air chamber operating mechanism 600 and the rear air chamber operating mechanism 700 of the present invention are not different from the conventional air chamber operating mechanism in structure. Are not described herein for brevity.
The installation position of the front air chamber operating mechanism 600 in the invention is not different from the prior art, and is also installed right in front of the front inflatable compartment 100, the front air chamber operating mechanism 600 also drives the rod 440 in the front three-position isolating switch 400 to rotate through the chain transmission mechanism, the screw rod 450 can be driven to rotate through rotating the rod 440, the rotating screw rod 450 drives the moving contact 430 to perform linear motion through the screw rod nut 460, and the closing, isolating and grounding functions of the front three-position isolating switch 400 are realized.
The invention is characterized in that the rear air chamber operating mechanism 700 is arranged in front of the front inflatable compartment 100, a front transmission device 800 is arranged in front of the front inflatable compartment 100, a rear transmission device 900 is arranged on the back of the rear inflatable compartment 200, the rear air chamber operating mechanism 700 drives the rear transmission device 900 to act through the front transmission device 800 and a transmission element 1000 penetrating through the front inflatable compartment 100 and the rear inflatable compartment 200, and drives a rod 540 in the rear three-position isolating switch 500 to rotate through the rear transmission device 900, the screw rod 550 can be driven to rotate through a rotating rod 540, the rotating screw rod 550 drives a moving contact 530 to perform linear motion through a screw rod nut 560, and the functions of closing, isolating and grounding of the rear three-position isolating switch 500 are realized.
Referring collectively to fig. 3, the driving member 1000 includes a driving sleeve 1100 and a driving shaft 1200, the driving sleeve 1100 passing through the bottom of the front inflating compartment 100 and the bottom of the rear inflating compartment 200 and being welded to the front and rear air box plates 120, 110 of the front inflating compartment 100 and the front and rear air box plates 210, 220 of the rear inflating compartment 200; drive shaft 1200 passes through drive sleeve 1100.
Referring to fig. 3 to 5, the front driving device 800 includes a front bracket 810, a first chain sprocket 820, and a first double chain sprocket 830, the front bracket 810 is fixed on the front box plate 120 of the front inflation chamber 100, and the front end of the driving shaft 1200 is axially disposed on the front bracket 810 through a front deep groove ball bearing 840 and a front bearing bush 850. The first chain wheel 820 is keyed on the front end of the transmission shaft 1200, and the first double-chain wheel 820 is axially arranged on the front bracket 810; the output sprocket 710 of the rear air cell operating mechanism 700 is power-connected to the driving sprocket of the first double-chain sprocket 830 by a first chain 860, and the first chain 860 is tensioned by a tension sprocket 870 pivoted to the front bracket 810. A driven sprocket of the first double-chain sprocket 830 is in power connection with the first sprocket 830 through a second chain 880; the rear air chamber operating mechanism 700 drives the transmission shaft 1200 to rotate through the output sprocket 710, the first chain 860, the first double-chain sprocket 830, the second chain 880 and the first sprocket 820.
The rear transmission 900 includes a rear bracket 910, a rear bracket bent plate 920, a second sprocket 930, a second double-chain sprocket 940, and a third sprocket 950, the rear bracket 910 and the rear bracket bent plate 920 are fixed on the rear air box plate 220 of the rear inflatable compartment 200, and the rear end of the transmission shaft 1200 is axially disposed on the rear bracket 910 through a rear deep groove ball bearing 960 and a bearing bushing 970.
The second chain wheel 930 is keyed on the rear end of the transmission shaft 1200, the second double-chain wheel 940 and the third chain wheel 950 are axially arranged on the rear bracket bent plate 920, the second chain wheel 930 is in power connection with a driving chain wheel in the second double-chain wheel 940 through a third chain 980, a driven chain wheel in the second double-chain wheel 940 is in power connection with a third chain wheel 950 through a fourth chain 990, and the third chain wheel 950 is in power connection with a rod 540 in the rear three-station isolating switch 500; the transmission shaft 1200 drives the rod 540 in the rear three-position disconnecting switch 500 to rotate through the second chain wheel 930, the third chain 980, the second double-chain wheel 940, the fourth chain 990 and the third chain wheel 950, so that the lead screw 550 can be driven to rotate, the movable contact 530 is driven by the rotating lead screw 550 to perform linear motion through the lead screw nut 560, and the closing, isolating and grounding functions of the rear three-position disconnecting switch 500 are realized.
Claims (6)
1. A device with double main bus isolation functions comprises a front inflating compartment and a rear inflating compartment, wherein the front inflating compartment and the rear inflating compartment are electrically connected through a bus connector; the device is characterized in that a rear air chamber operating mechanism and a front transmission device are arranged in front of the front inflatable compartment, a rear transmission device is arranged on the back surface of the rear inflatable compartment, the rear air chamber operating mechanism drives the rear transmission device to act through the front transmission device and a transmission element penetrating through the front inflatable compartment and the rear inflatable compartment, and the functions of closing, isolating and grounding of a rear three-station isolating switch are realized through the rear transmission device;
the transmission element comprises a transmission sleeve and a transmission shaft, and the transmission sleeve penetrates through the front inflation compartment and the rear inflation compartment and is welded with the front and rear air box plates of the front inflation compartment and the front and rear air box plates of the rear inflation compartment; the transmission shaft penetrates through the transmission sleeve; the front end of the transmission shaft is in driving connection with the front transmission device, and the rear end of the transmission shaft is in driving connection with the rear transmission device;
the front transmission device comprises a front support, a first chain wheel and a first double-chain wheel, the front support is fixed on a front air box plate of the front inflation air chamber, the front end of the transmission shaft is arranged on the front support in a shaft mode, the first chain wheel is arranged at the front end of the transmission shaft in a key mode, and the first double-chain wheel is arranged on the front support in a shaft mode; an output chain wheel in the rear air chamber operating mechanism is in power connection with a driving chain wheel in the first double-chain wheel through a first chain, and a driven chain wheel in the first double-chain wheel is in power connection with the first chain wheel through a second chain; the rear air chamber operating mechanism drives the transmission shaft to rotate through the output chain wheel, the first chain, the first double-chain wheel, the second chain and the first chain wheel.
2. The apparatus with dual main bus isolation as claimed in claim 1, wherein the front three-position isolation switch and the rear three-position isolation switch are coaxial.
3. The device with the function of isolating the double main buses as claimed in claim 1, wherein the driving sleeves are positioned at the bottom of the front inflatable compartment and the rear inflatable compartment.
4. The device with the double-main-bus isolation function as claimed in claim 1, wherein the front end of the transmission shaft is arranged on the front bracket through a front deep groove ball bearing and a front bearing bush shaft.
5. The apparatus with dual main bus bar isolation as claimed in claim 4, wherein the rear transmission device comprises a rear bracket, a rear bracket bent plate, a second sprocket, a second dual chain sprocket, and a third sprocket, the rear bracket and the rear bracket bent plate are fixed on the rear air box plate of the rear inflation compartment, the rear end shaft of the transmission shaft is arranged on the rear bracket, the second sprocket is keyed on the rear end of the transmission shaft, and the second dual chain sprocket and the third sprocket are arranged on the rear bracket bent plate; the second chain wheel is in power connection with a driving chain wheel in the second double-chain wheel through a third chain, a driven chain wheel in the second double-chain wheel is in power connection with the third chain wheel through a fourth chain, and the third chain wheel is in power connection with a rod in the rear three-station isolating switch; the transmission shaft drives a rod in the rear three-station isolating switch to rotate through a second chain wheel, a third chain, a second double-chain wheel, a fourth chain and a third chain wheel, and the closing, isolating and grounding functions of the rear three-station isolating switch are realized.
6. The device with the double-main-bus isolation function as claimed in claim 5, wherein the rear end of the transmission shaft is arranged on the rear bracket through a rear deep groove ball bearing and a bearing bush shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560223.8A CN109494605B (en) | 2018-12-19 | 2018-12-19 | Device with double main bus isolation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560223.8A CN109494605B (en) | 2018-12-19 | 2018-12-19 | Device with double main bus isolation function |
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| Publication Number | Publication Date |
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| CN109494605A CN109494605A (en) | 2019-03-19 |
| CN109494605B true CN109494605B (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811560223.8A Active CN109494605B (en) | 2018-12-19 | 2018-12-19 | Device with double main bus isolation function |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960758A (en) * | 2017-04-05 | 2017-07-18 | 平高集团有限公司 | A kind of switch cubicle and its switching device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201298670Y (en) * | 2008-11-10 | 2009-08-26 | 宁波华通电器集团股份有限公司 | Enclosed double-bus bar switch device |
| CN203119377U (en) * | 2013-04-01 | 2013-08-07 | 天安电气集团浙江电气有限公司 | Double-bus gas-insulated metal-enclosed switchgear |
| CN203300529U (en) * | 2013-05-28 | 2013-11-20 | 山东泰开隔离开关有限公司 | Base transmission device of isolation switch |
| CN105185642B (en) * | 2015-09-16 | 2018-02-06 | 上海天灵开关厂有限公司 | A kind of direct-acting three-working-position isolation and gas insulation switch cabinet |
| CN108832522B (en) * | 2018-07-10 | 2019-09-03 | 成都中工电气工程有限公司 | Contact net online switchboard assembly |
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2018
- 2018-12-19 CN CN201811560223.8A patent/CN109494605B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960758A (en) * | 2017-04-05 | 2017-07-18 | 平高集团有限公司 | A kind of switch cubicle and its switching device |
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