CN112803399B - A combined electrical appliance with double busbar segmented wiring and its operation method - Google Patents
A combined electrical appliance with double busbar segmented wiring and its operation method Download PDFInfo
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- CN112803399B CN112803399B CN202110062334.1A CN202110062334A CN112803399B CN 112803399 B CN112803399 B CN 112803399B CN 202110062334 A CN202110062334 A CN 202110062334A CN 112803399 B CN112803399 B CN 112803399B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention relates to a combined electrical appliance in a double-bus sectional wiring mode, which comprises a first bus, a second bus, a third bus and a fourth bus, wherein the first bus, the second bus, the third bus and the fourth bus are all connected with a bus-bar spacing mechanism, the bus-bar spacing mechanism comprises a first wiring connected with the second bus and the fourth bus, a second wiring connected with the first bus and the third bus and a third wiring connected with the first wiring and the second wiring. The wiring form is only provided with 1 set of bus-bar interval, so that the effect of two sets of bus-bar intervals is realized, and the bus-bar interval can be used as the bus-bar interval of the second bus-bar and the third bus-bar and the bus-bar interval of the first bus-bar and the fourth bus-bar on the basis of meeting the contact interval of the first bus-bar and the second bus-bar and the contact interval of the third bus-bar and the fourth bus-bar.
Description
Technical Field
The invention relates to a combined electrical appliance, in particular to a combined electrical appliance in a double-bus sectional wiring mode and an operation method thereof.
Background
The prior double-bus double-section wiring mode is shown in figure 1 of the attached drawing of the specification, and comprises a first bus, a second bus, a third bus and a fourth bus, wherein the first bus, the second bus and the third bus are connected with the fourth bus through a connecting interval mechanism. Taking the connection form of the third bus and the fourth bus as an example, the interconnection interval mechanism comprises a main transformer interval for connecting the third bus and the fourth bus, a line interval for connecting the third bus and the fourth bus and a bus connection interval for connecting the third bus and the fourth bus. The first bus bar, the second bus bar, the third bus bar and the fourth bus bar are respectively connected with the PT intervals. The second bus bar and the fourth bus bar as well as the first bus bar and the third bus bar are connected by a sectioning interval.
The double-bus double-section wiring form has the technical defects that two sets of bus-bar intervals are required to be arranged on four buses in the using process, so that the equipment structure is complex, the manufacturing cost is increased, and when one of the first bus and the second bus fails, the inverted bus operation can be realized through the bus-bar intervals connected with the first bus and the second bus, namely, the load on the failed bus is transferred to the non-failed bus. When one of the third bus bar and the fourth bus bar fails, the inverted bus bar operation can be realized through the bus bar interval connected with the third bus bar and the fourth bus bar. However, the bus inversion operation is only realized by switching the buses on the same side, and the operation of the crossed bus inversion of the lines cannot be realized, namely the mutual bus inversion of the second bus and the third bus and the mutual bus inversion of the first bus and the fourth bus cannot be realized. For example, the second bus and the third bus need to be overhauled at the same time, and in the wiring form, due to the fact that the circuit breakers with the bus interval and the sectioning interval connected with the second bus and the third bus are evenly opened, the interval on the first bus and the fourth bus is disconnected, so that the first bus and the fourth bus cannot realize mutual bus inversion, and the limitation is larger during use.
In addition to the above drawbacks, in the above-described double-bus double-segment wiring form, the second bus and the fourth bus are disconnected by the segment interval, and the first bus and the third bus are disconnected by the segment interval. The sectioning interval can only realize the same-side bus disconnection, can not realize the bus cross disconnection, and is limited greatly during use.
Disclosure of Invention
The invention is realized by the following technical scheme, and provides a double-bus sectional wiring type combined electrical appliance and an operation method thereof.
The invention provides a combined electrical appliance in a double-bus sectional wiring mode, which comprises a first bus, a second bus, a third bus and a fourth bus, wherein the first bus, the second bus, the third bus and the fourth bus are all connected with a bus connection interval mechanism, the bus connection interval mechanism comprises a first wiring for connecting the second bus and the fourth bus, a second wiring for connecting the first bus and the third bus and a third wiring for connecting the first wiring and the second wiring, a first isolating switch, a first grounding maintenance switch and a second isolating switch are sequentially connected from the first wiring to the second bus from the near to the far, a third isolating switch, a second grounding maintenance switch and a fourth isolating switch are sequentially connected from the first bus to the near to the far, and a fifth isolating switch, a third grounding maintenance switch, a first current transformer, a circuit breaker, a second current transformer, a fourth grounding maintenance switch and a sixth isolating switch are sequentially connected to the third wiring.
Preferably, the PT interval of the corresponding second bus bar is connected to the first connection between the first disconnecting switch and the second bus bar.
Preferably, the PT interval of the corresponding fourth bus bar is connected to the first connection between the second disconnecting switch and the fourth bus bar.
Preferably, the PT interval of the corresponding first bus bar is connected to the second connection between the third isolating switch and the first bus bar.
Preferably, the PT interval of the corresponding third bus bar is connected to the second connection between the fourth isolating switch and the third bus bar.
Preferably, the connection position of the third wiring and the first wiring is located between the first grounding maintenance switch and the second isolation switch, and the connection position of the third wiring and the second wiring is located between the third isolation switch and the second grounding maintenance switch.
Preferably, the third bus bar and the fourth bus bar are connected by a main transformer interval and a line interval, and the first bus bar and the second bus bar are connected by a main transformer interval and a line interval.
In a second aspect of the present invention, there is provided a method for operating the above-mentioned combined electrical apparatus, comprising the steps of:
① The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the second isolating switch is opened, the fourth isolating switch is opened, and the bus-bar spacing mechanism is used as a bus-bar spacing of the first bus bar and the second bus bar;
② The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the first isolating switch is opened, the third isolating switch is opened, and the bus-bar spacing mechanism is used as a bus-bar spacing of the third bus bar and the fourth bus bar;
③ The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the second isolating switch is opened, the third isolating switch is opened, and the bus-bar spacing mechanism is used as a bus-bar spacing of the second bus bar and the third bus bar;
④ The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the first isolating switch is opened, the fourth isolating switch is opened, and the bus-bar spacing mechanism is used as a bus-bar spacing between the fourth bus bar and the first bus bar;
⑤ The first isolating switch is closed, the fifth isolating switch is opened, the second isolating switch is closed, the third isolating switch is opened, the fourth isolating switch is opened, and the bus-bar spacing mechanism is used as the sectional spacing of the second bus and the fourth bus;
⑥ The first isolating switch is opened, the second isolating switch is opened, the third isolating switch is closed, the fourth isolating switch is closed, the sixth isolating switch is opened, and the bus-bar spacing mechanism is used as the sectional spacing of the first bus and the third bus;
⑦ The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the second isolating switch is opened, the third isolating switch is opened, and the bus-bar spacing mechanism is used as the sectional spacing of the second bus and the third bus;
⑧ The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the first isolating switch is opened, the fourth isolating switch is opened, and the bus-bar spacing mechanism is used as the sectional spacing between the fourth bus and the first bus.
The beneficial effects of the invention are as follows:
1. The wiring form is only provided with 1 set of bus-bar interval, so that the effect of two sets of bus-bar intervals is realized, and the bus-bar interval can be used as the bus-bar interval of the second bus-bar and the third bus-bar and the bus-bar interval of the first bus-bar and the fourth bus-bar on the basis of meeting the contact interval of the first bus-bar and the second bus-bar and the contact interval of the third bus-bar and the fourth bus-bar.
2. The bus bar interval of the wiring form simultaneously realizes the functions of serving as the sectioning interval of the second bus bar and the fourth bus bar, serving as the sectioning interval of the first bus bar and the third bus bar, serving as the sectioning interval of the first bus bar and the fourth bus bar and serving as the sectioning interval of the second bus bar and the third bus bar. The flexibility of power supply selection during maintenance of any bus is provided, and a plurality of possibilities are provided.
3. The first bus, the second bus, the third bus and the fourth bus are simultaneously connected with the bus connection intervals, so that the bus operation can be shared by all the incoming and outgoing line intervals.
4. Because this bus allies oneself with interval indirect connection has all 4 bars, can realize multiple wiring forms in theory, like single bus segmentation, stride space double bus wiring and double bus double segmentation wiring, the flexibility is very strong in the actual operation.
5. The single bus bar interval is adopted, 4 bus bars are all connected through the interval, the bus bar interval of the 4 bus bars is used, and when the operation of inverting the bus bars (overhauling and switching the bus bars) is needed, the operation can be completed only by closing the bus bar interval.
6. The circuit breakers and the current transformers are cancelled at the sectioning intervals, the disconnecting switch is used as a bus section, 2 circuit breakers are saved, and meanwhile, when the bus on one side of the sectioning interval is overhauled, the action of disconnecting the bus at the sectioning interval meets the actual requirement.
7. 4 PT intervals are arranged in the two isolation segmentation intervals by changing the structure and the arrangement form, so that the space of 4 interval intervals is saved.
Drawings
FIG. 1 is a schematic diagram of a conventional dual bus segment wiring;
FIG. 2 is a schematic diagram of a dual bus segment wiring of the present invention;
FIG. 3 is a schematic diagram of the bus bar spacing mechanism of the present invention;
FIG. 4 is a sectional view of the assembled spacer of the present invention;
The figure shows:
1. The device comprises a first bus, 2, a second bus, 3, a third bus, 4, a fourth bus, 5, a main transformer interval, 6, a line interval, 7, a PT interval, 8, a bus connection interval mechanism, 9, a first isolating switch, 10, a first grounding maintenance switch, 11, a third grounding maintenance switch, 12, a fifth isolating switch, 13, a first current transformer, 14, a circuit breaker, 15, a second current transformer, 16, a third isolating switch, 17, a fourth grounding maintenance switch, 18, a sixth isolating switch, 19, a second grounding maintenance switch, 20, a fourth isolating switch, 21, a second isolating switch, 22, a first wiring, 23, a third wiring, 24 and a second wiring.
Detailed Description
In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.
As shown in fig. 2 and 3, the invention comprises a first bus bar 1, a second bus bar 2, a third bus bar 3 and a fourth bus bar 4, wherein the first bus bar 1, the second bus bar 2, the third bus bar 3 and the fourth bus bar 4 are all connected with a bus bar spacing mechanism 8. The bus bar spacing mechanism 8 includes a first wiring 22 connecting the second bus bar 2 and the fourth bus bar 4, a second wiring 24 connecting the first bus bar 1 and the third bus bar 3, and a third wiring 23 connecting the first wiring 22 and the second wiring 24.
The first disconnecting switch 9, the first earthing switch 10 and the second disconnecting switch 21 are connected in sequence from the near to the far to the second bus bar 2 on the first wiring 22. The PT interval 7 corresponding to the second bus bar 2 is connected to the first connection 22 between the first disconnecting switch 9 and the second bus bar 2. The PT interval 7 corresponding to the fourth bus bar 4 is connected to the first connection 22 between the second disconnecting switch 21 and the fourth bus bar 4.
The third disconnecting switch 16, the second earthing switch 19 and the fourth disconnecting switch 20 are connected in sequence from the first bus bar 1 from the near to the far on the second wiring 24. The PT interval 7 corresponding to the first bus bar 1 is connected to the second connection 24 between the third disconnecting switch 16 and the first bus bar 1. The PT interval 7 corresponding to the third bus bar 3 is connected to the second connection 24 between the fourth disconnecting switch 20 and the third bus bar 3.
The third connection 23 is connected in sequence to a fifth isolating switch 12, a third earthing switch 11, a first current transformer 13, a circuit breaker 14, a second current transformer 15, a fourth earthing switch 17 and a sixth isolating switch 18. The connection position of the third wiring 23 and the first wiring 22 is located between the first grounding repair switch 10 and the second isolation switch 21. The connection position of the third connection 23 and the second connection 24 is located between the third disconnecting switch 16 and the second earthing and repairing switch 19.
In this embodiment, the PT interval is an existing structure, and the specific structure of the PT interval is not described again.
In the present embodiment, the third bus bar 3 and the fourth bus bar 4 are connected by the main transformer space 5 and the line space 6, and the first bus bar 1 and the second bus bar 2 are connected by the main transformer space 5 and the line space 6. The main transformer interval 5 and the line interval 6 are both of the existing structure.
The application occupies only 3 interval positions by structurally integrating PT intervals, segmentation intervals and bus-tie intervals, and is particularly shown in fig. 4. While in the conventional wiring form, four PT intervals corresponding to four buses need to occupy 4 interval positions, a bus connection interval occupies 1 interval position, and two sets of segmentation intervals occupy 2 interval positions, namely in the conventional wiring form, 7 interval positions need to be occupied. Therefore, the space size of the combined electrical appliance is greatly reduced, and the advantages are very obvious.
According to the invention, when most buses are overhauled, the line interval 6 and the main transformer interval 5 can be normally put into operation, and when the first bus 1, the second bus 2, the third bus 3 and the fourth bus 4 are overhauled, the overhauling buses can be withdrawn from operation by operating the bus-bar interval mechanism 8, and the line interval 6 and the main transformer interval 5 can be normally operated. When the first bus 1 is overhauled, the fourth isolating switch 20 is opened, the first bus 1 and the third bus 3 are disconnected at a sectionalized interval, the second isolating switch 21 is opened, the first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the third isolating switch 16 is closed, the isolating switches of all the line intervals 6 and the main transformer intervals 5 on the first bus 1 are opened, the load of the first bus 1 is totally poured onto the second bus 2, and the overhauling bus is withdrawn from operation and the line intervals 6 and the main transformer intervals 5 are normally operated. The other bus can be repaired according to the method. For another example, the second bus bar 2 and the third bus bar 3 need to be overhauled at the same time, as the bus bar spacing mechanism 8 is connected with the first bus bar 1, the second bus bar 2, the third bus bar 3 and the fourth bus bar 4 at the same time, the first bus bar 1 and the fourth bus bar 4 can be connected through the bus bar spacing mechanism 8, and it is ensured that all the incoming and outgoing line intervals can run through the common bus bar (connected through the first bus bar 1 and the fourth bus bar 4). When the first bus 1 and the fourth bus 4 are overhauled simultaneously in the same way, all the incoming and outgoing line intervals can run on the common bus (connected through the second bus 2 and the third bus 3).
The operation method of the double-bus sectional wiring type combined electrical appliance comprises the following steps of:
① The first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the third isolating switch 16 is closed, the second isolating switch 21 is opened, the fourth isolating switch 20 is opened, and the bus-bar spacing mechanism 8 is used as a bus-bar spacing of the first bus bar 1 and the second bus bar 2;
② The second isolating switch 21 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the fourth isolating switch 20 is closed, the first isolating switch 9 is opened, the third isolating switch 16 is opened, and the bus-bar spacing mechanism 8 is used as a bus-bar spacing of the third bus bar 3 and the fourth bus bar 4;
③ The first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the fourth isolating switch 20 is closed, the second isolating switch 21 is opened, the third isolating switch 16 is opened, and the bus-bar spacing mechanism 8 is used as a bus-bar spacing between the second bus bar 2 and the third bus bar 3;
④ The second isolating switch 21 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the third isolating switch 16 is closed, the first isolating switch 9 is opened, the fourth isolating switch 20 is opened, and the bus-bar spacing mechanism 8 is used as a bus-bar spacing between the fourth bus bar 4 and the first bus bar 1;
⑤ The first isolating switch 9 is closed, the fifth isolating switch 12 is opened, the second isolating switch 21 is closed, the third isolating switch 16 is opened, the fourth isolating switch 20 is opened, and the bus bar spacing mechanism 8 is used as the sectional spacing of the second bus bar 2 and the fourth bus bar 4;
⑥ The first isolating switch 9 is opened, the second isolating switch 21 is opened, the third isolating switch 16 is closed, the fourth isolating switch 20 is closed, the sixth isolating switch 18 is opened, and the bus bar spacing mechanism 8 is used as the sectional spacing of the first bus bar 1 and the third bus bar 3;
⑦ The first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the fourth isolating switch 20 is closed, the second isolating switch 21 is opened, the third isolating switch 16 is opened, and the bus-bar spacing mechanism 8 is used as the sectional spacing of the second bus 2 and the third bus 3;
⑧ The second isolating switch 21 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the third isolating switch 16 is closed, the first isolating switch 9 is opened, the fourth isolating switch 20 is opened, and the bus bar spacing mechanism 8 serves as a sectional spacing between the fourth bus bar 4 and the first bus bar 1.
It should be understood that the foregoing embodiments and the accompanying drawings are only for illustrating the technical aspects of the present invention, but not for limiting the present invention, and that the present invention is not limited to the preferred embodiments, and that the changes, modifications, additions or substitutions made by those skilled in the art within the spirit and scope of the present invention will not depart from the spirit and scope of the present invention as defined in the appended claims.
Claims (6)
1. The operation method of the combined electrical appliance in the double-bus sectional wiring mode is characterized in that the combined electrical appliance in the double-bus sectional wiring mode comprises a first bus, a second bus, a third bus and a fourth bus, and the first bus, the second bus, the third bus and the fourth bus are all connected with a bus-bar spacing mechanism; the bus connection spacing mechanism comprises a first wiring for connecting a second bus and a fourth bus, a second wiring for connecting the first bus and the third bus, and a third wiring for connecting the first wiring and the second wiring, wherein the first wiring is sequentially connected with a first isolating switch, a first grounding maintenance switch and a second isolating switch from the second bus from the near to the far;
The connection position of the third wiring and the first wiring is positioned between the first grounding maintenance switch and the second isolation switch;
The operation method comprises the following steps:
① The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the second isolating switch is opened, the fourth isolating switch is opened, and the bus-bar spacing mechanism is used as a bus-bar spacing of the first bus bar and the second bus bar;
② The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the first isolating switch is opened, the third isolating switch is opened, and the bus-bar spacing mechanism is used as a bus-bar spacing of the third bus bar and the fourth bus bar;
③ The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the second isolating switch is opened, the third isolating switch is opened, and the bus-bar spacing mechanism is used as a bus-bar spacing of the second bus bar and the third bus bar;
④ The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the first isolating switch is opened, the fourth isolating switch is opened, and the bus-bar spacing mechanism is used as a bus-bar spacing between the fourth bus bar and the first bus bar;
⑤ The first isolating switch is closed, the fifth isolating switch is opened, the second isolating switch is closed, the third isolating switch is opened, the fourth isolating switch is opened, and the bus-bar spacing mechanism is used as the sectional spacing of the second bus and the fourth bus;
⑥ The first isolating switch is opened, the second isolating switch is opened, the third isolating switch is closed, the fourth isolating switch is closed, the sixth isolating switch is opened, and the bus-bar spacing mechanism is used as the sectional spacing of the first bus and the third bus;
⑦ The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the second isolating switch is opened, the third isolating switch is opened, and the bus-bar spacing mechanism is used as the sectional spacing of the second bus and the third bus;
⑧ The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the first isolating switch is opened, the fourth isolating switch is opened, and the bus-bar spacing mechanism is used as the sectional spacing between the fourth bus and the first bus.
2. The method of claim 1, wherein the PT interval of the corresponding second bus is connected to the first connection between the first disconnecting switch and the second bus.
3. The method of claim 2, wherein the PT interval of the fourth bus bar is connected to the first connection between the second disconnecting switch and the fourth bus bar.
4. A method of operating a sectional wiring type electrical combiner of double bus bars according to claim 3, wherein the PT spacing of the corresponding first bus bar is connected to the second wiring between the third disconnector and the first bus bar.
5. The method of claim 4, wherein the PT interval of the corresponding third bus is connected to the second connection between the fourth disconnecting switch and the third bus.
6. The method of claim 1, wherein the third bus bar and the fourth bus bar are connected by a main transformer space and a line space, and the first bus bar and the second bus bar are connected by the main transformer space and the line space.
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| CN202110062334.1A CN112803399B (en) | 2021-01-18 | 2021-01-18 | A combined electrical appliance with double busbar segmented wiring and its operation method |
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| CN202110062334.1A CN112803399B (en) | 2021-01-18 | 2021-01-18 | A combined electrical appliance with double busbar segmented wiring and its operation method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208923563U (en) * | 2018-09-10 | 2019-05-31 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of HGIS segmentation, the integrated apparatus arrangement structure in mother interval |
| CN214069584U (en) * | 2021-01-18 | 2021-08-27 | 山东泰开高压开关有限公司 | Combined electrical apparatus of double-bus sectional wiring form |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6140129B2 (en) * | 2014-11-14 | 2017-05-31 | 古河電気工業株式会社 | Terminal block and terminal block unit |
| CN115986736A (en) * | 2023-02-28 | 2023-04-18 | 中国电建集团成都勘测设计研究院有限公司 | Three-bus hybrid electric main wiring circuit and using method and power supply method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208923563U (en) * | 2018-09-10 | 2019-05-31 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of HGIS segmentation, the integrated apparatus arrangement structure in mother interval |
| CN214069584U (en) * | 2021-01-18 | 2021-08-27 | 山东泰开高压开关有限公司 | Combined electrical apparatus of double-bus sectional wiring form |
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