CN112531470B - High-voltage change-over switch box - Google Patents
High-voltage change-over switch box Download PDFInfo
- Publication number
- CN112531470B CN112531470B CN202011463761.2A CN202011463761A CN112531470B CN 112531470 B CN112531470 B CN 112531470B CN 202011463761 A CN202011463761 A CN 202011463761A CN 112531470 B CN112531470 B CN 112531470B
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- wiring terminal
- copper
- terminal row
- contactor
- cables
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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
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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
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
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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
- H02B1/24—Circuit arrangements for boards or switchyards
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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
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
Abstract
The invention provides a high-voltage transfer switch box, comprising: the frame, preceding cabinet door I, preceding cabinet door II, the last cabinet door of footboard is prevented in the area, left side apron, right side apron, rear side apron, left side binding post row, right side binding post row, the upper binding post row of rear side, rear side lower floor's binding post row, left and right side are provided with a plurality of contactors respectively, set up the insulating arc extinguishing cover plate of arc extinguishing chamber top of contactor sets up copper bar and support insulator are connected to a plurality of relays of switch box bottom half. The invention integrates the whole vehicle power supply control and protection contactor into a cabinet body, reduces the design difficulty degree of other equipment of the vehicle and is beneficial to improving the whole vehicle counterweight design. If the vehicle breaks down, the fault line can be more conveniently checked through the high-voltage change-over switch box. Meanwhile, the state signals of the eight contactors are integrally fed back to the whole vehicle network control system by the single cabinet body, so that the whole vehicle wiring design and the whole vehicle electromagnetic compatibility are facilitated.
Description
Technical Field
The invention relates to the technical field of transfer switch boxes, in particular to a high-voltage transfer switch box.
Background
At present, the main design mode of main circuit power supply protection and control is that the line protection contactor is mostly distributed in each corresponding device, such as traction inverter, auxiliary inverter, high-voltage electrical box, etc. in the past. Therefore, the control and monitoring of the power supply of each system are realized. 1. The contactors for power supply control and detection are distributed for the whole power supply system. The integration level is low, and the whole vehicle electrical design is not facilitated. 2. The equipment with other cabinets is huge in size, and the design of the balance weight of the whole vehicle equipment is not facilitated. 3. Similar cabinets with partial contactors are disorderly in spatial layout, difficult to install and difficult to maintain due to the use of cables for wiring.
Disclosure of Invention
According to the technical problems of cable wiring, difficulty in installation, difficulty in maintenance and the like, the high-voltage change-over switch box is provided. The invention mainly utilizes a high-voltage change-over switch box, which is characterized by comprising the following components:
the switch box comprises a frame, a front cabinet door I, a front cabinet door II, an upper cabinet door with a pedal, a left side cover plate, a right side cover plate, a rear side cover plate, a left side wiring terminal row, a right side wiring terminal row, a rear side upper wiring terminal row, a rear side lower wiring terminal row, a plurality of contactors, an insulating arc-extinguishing cover plate arranged above arc-extinguishing covers of the contactors, a plurality of relays arranged at the bottom of a switch box body, a connecting copper bar and a supporting insulator, wherein the upper cabinet door is provided with the pedal;
the left wiring terminal block is respectively provided with two AT1 and two AT2 which are in short connection with a copper sheet AT 4 positions; the two + C2 positions are in short circuit through a copper sheet; the right wiring terminal row is provided with two copper sheets for short connection at the + P position, and two copper sheets for short connection at the + C1 position; the upper wiring terminal row on the rear side is provided with two-P bit short circuits which are made of copper sheets, and two-C1 bit short circuits which are made of copper sheets; the rear-side lower-layer wiring terminal block is provided with two-C2-bit copper sheet short circuits, and RTR1 and RTR 2-bit copper sheet short circuits.
Furthermore, two cables of a ground DC750V + power supply 1 are connected into the right wiring terminal block through two + C1 interfaces, and two cables of a pantograph DC750V + power supply are connected into the right wiring terminal block through two + P interfaces; two cables for supplying power to a traction system DC750V + are connected into the left wiring terminal block through two AT1 interfaces, two cables for supplying power to an auxiliary system DC750V + are connected into the left wiring terminal block through two AT2 interfaces, two cables for supplying power to a ground DC750V + are connected into the left wiring terminal block through two + C2 interfaces, and two cables for supplying power to a pantograph DC750V + are connected into the upper wiring terminal block on the rear side through two-P interfaces;
two cables of the ground DC 750V-power supply 1 are connected into the rear upper wiring terminal row through two-C1 interfaces, the workshop power supply is connected into the rear lower wiring terminal row through a KG interface, the arrester cable is connected into the rear lower wiring terminal row through an RTR2 interface, two cables of the traction system DC 750V-power supply are connected into the rear lower wiring terminal row through the RTR1 interface, and two cables of the ground DC 750V-power supply 2 are connected into the rear lower wiring terminal row through two-C2 interfaces.
Furthermore, the negative terminals of the first to fourth contactors are in short circuit through copper bars, and are connected to the RTR1 bit of the rear lower terminal row through the two copper bars and the insulator support; the negative ends of the fifth to eighth contactors are in short circuit by using copper bars, and then are supported by the insulator 1 to be connected to the AT2 position of the left terminal row through the two copper bars; the positive end of the first contactor is directly connected to the-C2 position of the lower layer terminal row at the rear side through a copper bar; the positive ends of the second contactor and the fourth contactor are in short circuit by using a copper bar and then are connected to a-P position of the upper-layer terminal row at the rear side by one copper bar; the positive end of the third contactor is directly connected to the-C1 position of the upper terminal row at the rear side through a copper bar; the positive end of the fifth contactor is directly connected to a KG position of the rear lower terminal row through a copper bar; the positive end of the sixth contactor is supported by the insulator 1 through two copper bars and is connected to the + C1 position; the positive end of the seventh contactor is supported by the insulator 1 through two copper bars and is connected to the + P position; the positive end of the eighth contactor is supported by the insulator 1 through two copper bars and is connected to the + C2 position.
Compared with the prior art, the invention has the following advantages:
the invention integrates the whole vehicle power supply control and protection contactor into a cabinet body, reduces the design difficulty degree of other equipment of the vehicle and is beneficial to improving the whole vehicle counterweight design. If the vehicle breaks down, the fault line can be more conveniently checked through the high-voltage change-over switch box. Meanwhile, the state signals of the eight contactors are integrally fed back to the whole vehicle network control system by the single cabinet body, so that the whole vehicle wiring design and the whole vehicle electromagnetic compatibility are facilitated. The compact structural design reduces the overall dimension of the cabinet body, reduces the installation dimension of the cabinet body and widens the application field of the cabinet body.
The high-voltage circuit and the low-voltage circuit in the cabinet body are thoroughly separated, and part of components are in modular design, so that the interference fault rate is reduced, and the electromagnetic compatibility is improved. The cabinet body is simple to assemble and disassemble, convenient to overhaul and maintain and capable of reducing daily maintenance cost. The cabinet body and the cabinet door are installed through bolts, so that the manufacturing cost is reduced, and the stability of the cabinet body is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of the switch cabinet of the present invention.
Fig. 2 is a front view of the rear of a concealed cabinet door of the switch cabinet of the present invention.
Fig. 3 is a top view of the switch cabinet of the present invention.
Fig. 4 is a right side view of the switch cabinet of the present invention.
Fig. 5 is a left side view of the switch cabinet of the present invention.
Fig. 6 is a rear view of a hidden cabinet door of the switch cabinet of the present invention.
Fig. 7 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of the switch box of the present invention.
Fig. 8 is a B-B cross-sectional view of the switch box of the present invention.
Wherein, 1, a front cabinet door I; 2. a front cabinet door II; 3. the upper cabinet door is arranged; 4. an explosion-proof vent valve; 5. a ground bolt; 6. a cable water joint; 7. a right side cover plate; 8. a left side cover plate; 9. a circular connector; 10. a cabinet frame; 11. a rear side cover plate; 12. a relay; 13. a left terminal row; 14. a contactor; 15. copper bars; 16. an insulating support; 17. a rear upper terminal row; 18. a rear lower terminal row; 19. an insulator; 20. an insulating arc extinguishing cover plate; 21. the right terminal row.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1-8, the invention provides a high-voltage transfer switch box, which comprises a frame, a front cabinet door i, a front cabinet door ii, an upper cabinet door with a pedal, a left side cover plate, a right side cover plate, a rear side cover plate, a left side terminal strip, a right side terminal strip, a rear upper layer terminal strip, a rear lower layer terminal strip, 4 sialon contactors, an insulating arc-extinguishing cover plate above an arc-extinguishing cover of the contactor, 4 relays at the front position in the middle of the bottom, a connecting copper bar, a supporting insulator and other related components, and is compact in overall layout and high in space utilization rate.
The left wiring terminal block is respectively provided with two AT1 and two AT2 short circuits which share 4 positions and are in short connection with copper sheets; the two + C2 positions are in short circuit through a copper sheet; the right wiring terminal block is provided with two + P bits which are in short circuit through copper sheets, and two + C1 bits which are in short circuit through copper sheets; the upper wiring terminal row on the rear side is provided with two-P bit short circuits which are made of copper sheets, and two-C1 bit short circuits which are made of copper sheets; the rear-side lower-layer wiring terminal block is provided with two-C2 bit copper sheet short circuits, and RTR1 and RTR2 bit copper sheet short circuits.
Fig. 2, 7 and 8 show the layout of the devices inside the whole cabinet, 4 seville cloisonne contactors are symmetrically distributed at the bottoms of the left side and the right side respectively, and an insulating arc-extinguishing cover plate is arranged above the contactors. The left side top installation left side binding post row, the right side top installation right side binding post row. And the middle part is arranged at the position close to the rear part, and the rear upper wiring terminal row and the rear lower wiring terminal row are installed. The middle part is close to the front bottom part and is provided with a relay module. The copper bar is connected with each high-voltage wiring point.
The relay control circuit realizes local modular design, and the four relays are arranged on the metal panel and are integrally arranged on the cabinet body mounting seat. The space is reasonably utilized, the electromagnetic compatibility is high, and the maintenance is convenient.
As shown in fig. 4, 5, and 6, two cables of the ground DC750V + power supply 1 are connected to the right terminal block through two + C1 interfaces, and two cables of the pantograph DC750V + power supply are connected to the right terminal block through two + P interfaces. Two cables of a traction system DC750V + power supply are connected into a left wiring terminal row through two AT1 interfaces, two cables of an auxiliary system DC750V + power supply are connected into the left wiring terminal row through two AT2 interfaces, two cables of a ground DC750V + power supply 2 are connected into the left wiring terminal row through two + C2 interfaces, and two cables of a pantograph DC 750V-power supply are connected into an upper wiring terminal row AT the rear side through two-P interfaces. Two cables of a ground DC 750V-power supply 1 are connected into a rear upper wiring terminal row through two-C1 interfaces, a workshop power supply is connected into a rear lower wiring terminal row through a KG interface, an arrester cable is connected into a rear lower wiring terminal row through an RTR2 interface, two cables of a traction system DC 750V-power supply are connected into a rear lower wiring terminal row through an RTR1 interface, and two cables of a ground DC 750V-power supply 2 are connected into a rear lower wiring terminal row through two-C2 interfaces. All external lines of the cabinet body are connected into the terminal strip, so that the wiring is convenient to remove, and the operation is simple.
The high-voltage strong current part in the cabinet completely uses the copper bar to carry out the electrical connection between the devices, the operation and the installation are simple, and the maintenance is convenient. The negative terminals of the first to fourth contactors are in short circuit by using copper bars, and then are supported by the insulator 2 to be connected to the RTR1 bit of the rear lower terminal row through the two copper bars; the negative terminals of the fifth to eighth contactors are in short circuit by using copper bars, and then are supported by the insulator 1 to be connected to the AT2 position of the left terminal row through the two copper bars; the positive end of the first contactor is directly connected to a-C2 position of the rear lower layer terminal block through a copper bar; the positive ends of the second contactor and the fourth contactor are in short circuit by using a copper bar and then are connected to a-P position of the upper-layer terminal row at the rear side by one copper bar; the positive end of the third contactor is directly connected to the-C1 position of the upper terminal row at the rear side through a copper bar; the positive end of the fifth contactor is directly connected to a KG position of the rear lower terminal row through a copper bar; the positive end of the sixth contactor is supported by the insulator 1 through two copper bars and is connected to the + C1 position; the positive end of the seventh contactor is supported by the insulator 1 through two copper bars and is connected to the + P position; the positive end of the eighth contactor is supported by the insulator 1 to be connected to the + C2 position through two copper bars.
As can be seen from fig. 2, 7 and 8, all high-voltage and high-current circuits inside the cabinet body are connected by copper bars, and the copper bars are distributed in the rear part and the upper part of the cabinet body. All control lines are distributed on the two sides and the front part of the cabinet body, so that the separation of copper bars and cables with different voltage grades is realized, the electromagnetic interference in the cabinet is effectively reduced, and the electromagnetic compatibility of the cabinet body is ensured.
When the cabinet body is assembled, at first install eight contactors, the relay module, insulating arc-extinguishing cover version, insulator 1, insulator 2, left side, right side, rear side upper strata and rear side lower floor's terminal row, then connect control line portion with the cable, through the ligature pole ligature, insert the circular connector. And then installing a grounding wire of the contactor. And then, installing a copper bar, a left side cover plate, a right side cover plate, a rear side cover plate, a metal cable connector, a front cabinet door I, a front cabinet door II and an upper cabinet door to complete the assembly of the cabinet body, wherein the cabinet door is installed by adopting bolts, and the cabinet door has higher economical efficiency. It can be seen that the cabinet body is simple to install and operate, the overall layout design is compact, and the space utilization rate is high.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A high voltage transfer switch box, comprising:
the switch box comprises a frame, a front cabinet door I, a front cabinet door II, an upper cabinet door with a pedal, a left side cover plate, a right side cover plate, a rear side cover plate, a left side wiring terminal row, a right side wiring terminal row, a rear side upper wiring terminal row, a rear side lower wiring terminal row, a plurality of contactors, an insulating arc-extinguishing cover plate arranged above arc-extinguishing covers of the contactors, a plurality of relays arranged at the bottom of a switch box body, a connecting copper bar and a supporting insulator, wherein the upper cabinet door is provided with the pedal;
the left wiring terminal block is respectively provided with two AT1 and two AT2 short circuits which share 4 positions and are in short connection with copper sheets; the two + C2 positions are in short circuit through a copper sheet; the right wiring terminal block is provided with two + P bits which are in short circuit through copper sheets, and two + C1 bits which are in short circuit through copper sheets; the upper wiring terminal row on the rear side is provided with two-P position short-circuit terminals by copper sheets, and two-C1 position short-circuit terminals by copper sheets; the rear-side lower-layer wiring terminal block is provided with two-C2 bit copper sheet short circuits, and RTR1 and RTR2 bit copper sheet short circuits.
2. A high voltage diverter switch cabinet according to claim 1,
two cables of a ground DC750V + power supply 1 are connected into the right wiring terminal block through two + C1 interfaces, and two cables of a pantograph DC750V + power supply are connected into the right wiring terminal block through two + P interfaces; two cables for supplying power to a traction system DC750V + are connected into the left wiring terminal block through two AT1 interfaces, two cables for supplying power to an auxiliary system DC750V + are connected into the left wiring terminal block through two AT2 interfaces, two cables for supplying power to a ground DC750V + are connected into the left wiring terminal block through two + C2 interfaces, and two cables for supplying power to a pantograph DC 750V-are connected into the upper wiring terminal block on the rear side through two-P interfaces;
two cables of a ground DC 750V-power supply 1 are connected into the rear upper wiring terminal row through two-C1 interfaces, a workshop power supply is connected into the rear lower wiring terminal row through a KG interface, an arrester cable is connected into the rear lower wiring terminal row through an RTR2 interface, two cables of a traction system DC 750V-power supply are connected into the rear lower wiring terminal row through the RTR1 interface, and two cables of a ground DC 750V-power supply 2 are connected into the rear lower wiring terminal row through two-C2 interfaces.
3. A high voltage diverter switch cabinet according to claim 1,
the negative terminals of the first to fourth contactors are in short circuit through copper bars, pass through the two copper bars and are connected to the RTR1 position of the rear lower-layer terminal block through the insulator support; the negative terminals of the fifth to eighth contactors are in short circuit by using copper bars, and then are supported by the insulator 1 to be connected to the AT2 position of the left terminal row through the two copper bars; the positive end of the first contactor is directly connected to a-C2 position of the rear lower layer terminal block through a copper bar; the positive ends of the second contactor and the fourth contactor are in short circuit by using a copper bar and then are connected to a-P position of the upper-layer terminal row at the rear side by one copper bar; the positive end of the third contactor is directly connected to the-C1 position of the upper terminal row at the rear side through a copper bar; the positive end of the fifth contactor is directly connected to a KG position of the rear lower terminal row through a copper bar; the positive end of the sixth contactor is supported by the insulator 1 through two copper bars and is connected to the + C1 position; the positive end of the seventh contactor is supported by the insulator 1 through two copper bars and is connected to the + P position; the positive end of the eighth contactor is supported by the insulator 1 to be connected to the + C2 position through two copper bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463761.2A CN112531470B (en) | 2020-12-11 | 2020-12-11 | High-voltage change-over switch box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011463761.2A CN112531470B (en) | 2020-12-11 | 2020-12-11 | High-voltage change-over switch box |
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| CN112531470A CN112531470A (en) | 2021-03-19 |
| CN112531470B true CN112531470B (en) | 2023-01-03 |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201853955U (en) * | 2010-11-26 | 2011-06-01 | 湘潭电机股份有限公司 | Main circuit breaker box for metro vehicles |
| DE102011013836A1 (en) * | 2011-02-17 | 2012-08-23 | Still Gmbh | Electric energy storage for vehicle with electric drive |
| CN103475236B (en) * | 2013-08-01 | 2016-12-28 | 深圳市英威腾交通技术有限公司 | A kind of traction converter plant |
| CN105896421B (en) * | 2015-12-31 | 2017-06-30 | 鹤壁市瑞丰电器有限公司 | A kind of high voltage distribution box of new-energy automobile |
| CN108091522B (en) * | 2017-12-12 | 2019-08-23 | 北京中车赛德铁道电气科技有限公司 | A kind of heavy DC contactor |
| EP3624156B1 (en) * | 2018-09-17 | 2022-07-06 | Microelettrica Scientifica S.p.A. | Improved contactor device structure with improved auxiliary switch |
| CN109217133A (en) * | 2018-09-21 | 2019-01-15 | 株洲中车时代电气股份有限公司 | A kind of switch-box of magnetic suspension train |
| CN109524896B (en) * | 2018-10-16 | 2020-02-21 | 中车大连电力牵引研发中心有限公司 | High-voltage electrical box and train |
| CN111246688B (en) * | 2018-11-28 | 2021-07-09 | 湖南中车时代电动汽车股份有限公司 | Control assembly for electric automobile |
| CN110299850B (en) * | 2019-06-28 | 2021-04-20 | 西安中车永电电气有限公司 | High-power traction auxiliary converter |
| CN110774899B (en) * | 2019-11-13 | 2021-06-11 | 中车资阳机车有限公司 | Contactor box of pure electric rail locomotive |
| US11799272B2 (en) * | 2019-12-13 | 2023-10-24 | Eaton Intelligent Power Limited | Dual contactor electrical panelboard assembly, systems and methods |
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