CN111276930A - Duplex relay protection pressing plate with state monitoring function - Google Patents
Duplex relay protection pressing plate with state monitoring function Download PDFInfo
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- CN111276930A CN111276930A CN202010191491.8A CN202010191491A CN111276930A CN 111276930 A CN111276930 A CN 111276930A CN 202010191491 A CN202010191491 A CN 202010191491A CN 111276930 A CN111276930 A CN 111276930A
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- pressing plate
- pair
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- main
- connecting piece
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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Abstract
The invention discloses a duplex relay protection pressing plate with a state monitoring function, which comprises a pressing plate base and a pressing plate connecting piece, wherein a pair of main jacks, a pair of auxiliary jacks and a pair of positioning jacks are arranged on the pressing plate base, a pair of main insertion columns and a pair of auxiliary insertion columns are arranged on the pressing plate connecting piece, the pair of main insertion columns are mutually connected and conducted, the pair of auxiliary insertion columns are mutually connected and conducted, the main insertion columns are respectively inserted into one main jack and the auxiliary insertion columns are respectively inserted into one auxiliary jack in the switching-in state of the pressing plate connecting piece, connecting terminals corresponding to the main jacks and the auxiliary jacks are arranged on the pressing plate base, and the connecting terminals are respectively and electrically connected with conducting strips arranged in the corresponding main jacks or auxiliary jacks. The invention keeps the existing size and operation habit of the wire spring type relay protection pressing plate, has small popularization resistance, and adopts an electrical monitoring technology, so that the state monitoring result of the pressing plate is more reliable.
Description
Technical Field
The invention relates to the field of relay protection of substations, in particular to a duplex relay protection pressing plate with a state monitoring function.
Background
The transformer substation relay protection outlet pressing plate acts on the tripping of a breaker and the starting of other protection functions (such as failure, re-pressure blocking removal and the like), is an obvious visual breakpoint artificially increased in a relay protection outlet loop, can be convenient for operators to correctly judge the circuit state of a relay protection secondary loop, and provides convenience and safety support for overhauling and debugging. However, the outlet pressing plate is a function dividing point and a state monitoring blind point of the protection device and a primary equipment control loop, the switching state of the outlet pressing plate needs to be checked manually on site, the outlet pressing plate does not have an automatic monitoring function, the relay protection correct action is threatened to a certain extent, the case that the accident is caused or enlarged due to the wrong switching on and off of the outlet pressing plate is omitted inside and outside, the accident caused by the wrong switching on and off of the pressing plate is completely and conveniently recovered on site, and the serious interference is caused to the division of accident responsibility.
The relay protection hard pressing plate is positioned at the lower part of the front side of the protection screen and is divided into an outlet pressing plate, a functional pressing plate and a standby pressing plate which are respectively represented by red, yellow and camel. At present, a functional pressure plate can be optically coupled and automatically monitored through a protection device, the pressure plate state monitoring object mainly comprises an outlet pressure plate, and mainly comprises a tripping pressure plate, a starting failure pressure plate and a reclosing switch, and a starting stable control pressure plate is arranged in part of areas. The wire spring type pressing plate connecting piece is tied at the central position of the pressing plate base through a wire spring and can also rotate in a plane, when the pressing plate is put into use, the wire spring is stretched firstly, so that the vertical distance between the connecting piece and the base is larger than the exposed part of the conductive copper rod, then the connecting piece is rotated to release the wire spring when the conductive copper rod is conducted to the opposite positioning slot, and the connecting piece is conducted to copper film circuits in the upper and lower positioning slots; when the pressing plate is withdrawn, the wire spring is stretched, then the connecting piece is rotated to release the wire spring when the copper rod is conducted to the alignment slot, and the copper film circuit of the upper and lower alignment slots is disconnected. The wire spring type pressing plate is characterized in that the wire spring at the central position of the connecting piece is used as a shaft to generate rotary displacement, and the connecting piece is inconvenient to disassemble.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems in the prior art, the invention provides the duplex relay protection pressing plate with the state monitoring function, the existing size and operation habit of the wire spring type relay protection pressing plate are reserved, the popularization resistance is small, and the pressing plate state monitoring result is more reliable by adopting an electrical monitoring technology.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a pair of type relay protection clamp plate that possesses state monitoring function, includes that clamp plate base and clamp plate link the piece, be equipped with a pair of main jack, a pair of supplementary jack and a pair of reposition of redundant personnel jack on the clamp plate base, the clamp plate is equipped with a pair of owner on linking the piece and inserts the post and a pair of supplementary post of inserting, and a pair of owner inserts interconnect between the post and switches on, and interconnect switches on between a pair of supplementary post, and main post of inserting respectively inserts and locates in a main jack, and supplementary post of inserting respectively inserts and locate in a supplementary jack under the clamp plate links piece input state, be equipped with the connecting terminal that main jack, supplementary jack correspond on the clamp plate base, connecting terminal is connected with the conducting strip electricity in locating corresponding main jack or supplementary jack respectively.
Optionally, the pressing plate connecting piece comprises an insulating shell, a metal connecting piece is arranged between the pair of main insertion columns, a metal connecting piece is arranged between the pair of auxiliary insertion columns, and the pair of main insertion columns and the metal connecting piece thereof, and the pair of auxiliary insertion columns and the metal connecting piece thereof are embedded and fixed in the insulating shell.
Optionally, a connecting line between the pair of main insertion posts and a connecting line between the pair of auxiliary insertion posts are arranged in parallel.
Optionally, the spacing between the pair of main insertion posts and the spacing between the pair of auxiliary insertion posts are different in size.
Optionally, the pair of main insertion posts are located on a central axis of the pressing plate connecting piece, and the pair of auxiliary insertion posts are located on one side of the central axis of the pressing plate connecting piece.
Optionally, the length of the main insert post is longer than the length of the auxiliary insert post.
Optionally, in the pair of positioning insertion holes, one positioning insertion hole is located on one side of the pressure plate base, and the other positioning insertion hole is located on the other side of the pressure plate base.
Optionally, a positioning hole is formed in the pressing plate base, an insulating positioning column is arranged on the pressing plate connecting piece, and the insulating positioning column is inserted into the positioning hole in the pressing plate connecting piece in the input state.
Compared with the prior art, the invention has the following advantages: the invention provides a pair of main jacks, a pair of auxiliary jacks and a pair of positioning jacks on a pressure plate base of a duplex relay protection pressure plate with a state monitoring function, wherein a pair of main insertion columns and a pair of auxiliary insertion columns are arranged on a pressure plate connecting sheet, the pair of main insertion columns are mutually connected and conducted, the pair of auxiliary insertion columns are mutually connected and conducted, the main insertion columns are respectively inserted into one main jack and the auxiliary insertion columns are respectively inserted into one auxiliary jack under the input state of the pressure plate connecting sheet, the pressure plate base is provided with connecting terminals corresponding to the main jacks and the auxiliary jacks, the connecting terminals are respectively and electrically connected with conducting sheets arranged in the corresponding main jacks or the auxiliary jacks, the original pair of main insertion columns are still used as visual breakpoints of an outlet loop by transforming a spring type pressure plate connecting sheet and the base, a pair of auxiliary insertion columns are newly added for the state monitoring of the pressure plate, the main insertion columns and the auxiliary insertion columns are mutually insulated, the invention keeps the existing size and operation habit of the wire spring type relay protection pressing plate, has small popularization resistance, and adopts an electrical monitoring technology, so that the pressing plate state monitoring result is more reliable.
Drawings
Fig. 1 is a perspective structural diagram of an embodiment of the invention.
Fig. 2 is a schematic perspective view of an embodiment of the present invention.
Fig. 3 is a schematic top view of the embodiment of the invention.
Fig. 4 is a schematic sectional structure view of a-a in fig. 3.
Fig. 5 is a schematic sectional structure view of B-B in fig. 3.
Illustration of the drawings: 1. a platen base; 11. a main jack; 12. an auxiliary jack; 13. a position-dividing jack; 14. positioning holes; 2. pressing the plate to obtain a connecting piece; 21. a main insert column; 22. auxiliary inserting columns; 23. an insulating housing; 24. insulating reference column.
Detailed Description
As shown in fig. 1, 2, and 3, the duplex relay protection pressing plate with the state monitoring function in this embodiment includes a pressing plate base 1 and a pressing plate connecting piece 2, a pair of main insertion holes 11, a pair of auxiliary insertion holes 12, and a pair of positioning insertion holes 13 are provided on the pressing plate base 1, a pair of main insertion posts 21 and a pair of auxiliary insertion posts 22 are provided on the pressing plate connecting piece 2, the pair of main insertion posts 21 are connected and conducted with each other, the pair of auxiliary insertion posts 22 are connected and conducted with each other, the main insertion posts 21 are respectively inserted into one main insertion hole 11 and the auxiliary insertion posts 22 are respectively inserted into one auxiliary insertion hole 12 in the pressing plate connecting piece 2, connecting terminals corresponding to the main insertion holes 11 and the auxiliary insertion holes 12 are provided on the pressing plate base 1, and the connecting terminals are respectively electrically connected with conductive sheets provided in the corresponding main insertion holes 11 or auxiliary. The duplex relay protection pressing plate with the state monitoring function of the embodiment is formed by reforming the wire spring type pressing plate connecting piece and the base, on the basis of the original pair of main insertion posts 21 of the pressing plate connecting piece 2, a pair of auxiliary insertion posts 22 is added, and on the basis of the original main insertion holes 11 in the pressing plate base 1, an auxiliary jack 12 with an inner wall made of conductive copper material is respectively arranged at the upper edge and the lower edge close to the base 1 of the pressure plate, an original pair of main inserting columns 21 are still used as visual breakpoints of an outlet loop, a pair of auxiliary inserting columns 22 are additionally arranged for monitoring the state of the pressure plate, the main inserting columns 21 and the auxiliary inserting columns 22 are mutually insulated, the invention keeps the existing size and operation habit of the wire spring type relay protection pressing plate, has small popularization resistance, and adopts an electrical monitoring technology, so that the pressing plate state monitoring result is more reliable.
Referring to fig. 1, a connection terminal ①, a connection terminal ②, a connection terminal ③ and a connection terminal ④ are arranged on the pressing plate base 1, the connection terminal ① and the connection terminal ② are electrically connected with the conductive sheets arranged in the corresponding main jacks 11, the connection terminal ③ and the connection terminal ④ are electrically connected with the conductive sheets arranged in the corresponding auxiliary jacks 12, the connection terminal ③ and the connection terminal ④ are led out through hard wiring, and pressing plate state collection can be achieved through a protection device or a measurement and control device.
The size of the pressing plate connecting piece 2 of the duplex relay protection pressing plate with the state monitoring function is the same as that of the wire spring type relay protection pressing plate connecting piece widely used at present.
As shown in fig. 4 and 5, the pressing plate connecting piece 2 includes an insulating housing 23, a metal connecting piece is disposed between the pair of main insertion posts 21, a metal connecting piece is disposed between the pair of auxiliary insertion posts 22, and the pair of main insertion posts 21 and the metal connecting piece thereof, and the pair of auxiliary insertion posts 22 and the metal connecting piece thereof are embedded and fixed in the insulating housing 23.
In order to enhance the insulation and isolation effect between the main insertion column 21 and the auxiliary insertion column 22, as shown in fig. 4 and 5, the connection line between a pair of main insertion columns 21 and the connection line between a pair of auxiliary insertion columns 22 in this embodiment are arranged in parallel, so that under the limited space constraint, the distance between the main insertion column 21 and the auxiliary insertion column 22 is longer, and the insulation performance is better. In order to further enhance the insulation and isolation effect between the main insertion pillars 21 and the auxiliary insertion pillars 22, the distance between the pair of main insertion pillars 21 and the distance between the pair of auxiliary insertion pillars 22 in the present embodiment are different, because the original distance between the main insertion pillars 21 is smaller, and in order to maintain good insulation, the distance between the pair of main insertion pillars 21 is smaller than the distance between the pair of auxiliary insertion pillars 22 in the present embodiment, so as to ensure that the distance between the main insertion pillars 21 and the auxiliary insertion pillars 22 is longer and the insulation performance is better. In order to further enhance the insulation and isolation effect between the main inserting column 21 and the auxiliary inserting column 22, in this embodiment, the pair of main inserting columns 21 is located on the central axis of the pressing plate connecting piece 2, and the pair of auxiliary inserting columns 22 is located on one side of the central axis of the pressing plate connecting piece 2, so that under the limited space constraint, the distance between the main inserting columns 21 and the auxiliary inserting columns 22 is longer, and the insulation performance is better.
As shown in fig. 1 and 4, in order to further enhance the insulation and isolation effect between the main insertion column 21 and the auxiliary insertion column 22, in the present embodiment, the length of the main insertion column 21 is longer than that of the auxiliary insertion column 22, so that under the limited space constraint, the distance between the main insertion column 21 and the auxiliary insertion column 22 is longer and the insulation performance is better. As an alternative embodiment, the length of the main insertion column 21 is 5mm longer than that of the auxiliary insertion column 22 in this embodiment.
As shown in fig. 3 and 4, the pair of main posts 21 and the metal connecting sheet thereof form an inverted concave metal structure, and the pair of auxiliary posts 22 and the metal connecting sheet thereof also form an inverted concave metal structure, so that the pressing plate connecting sheet 2 includes two inverted concave metal structures, which are respectively referred to as a main metal structure and an auxiliary metal structure in this embodiment. The main metal framework has the same size and installation position as the inverted concave metal structure in the wire spring type relay protection pressing plate connecting piece which is widely applied at present, and is positioned in the middle of the connecting piece; the auxiliary metal framework is wider than the main metal framework in size and is arranged on the right side of the connected main metal framework; the main metal structure is still used as a visual breakpoint for protecting the outlet loop; the auxiliary metal structure is reserved as a pressure plate state monitoring contact for use. The insulating housing 23 is made of plastic, has high insulating performance, and can ensure reliable insulation of the main metal structure and the auxiliary metal framework under 1000V direct current voltage.
The size of the pressing plate base 1 is the same as that of a wire spring type relay protection pressing plate base widely used at present, two pairs of jacks with copper material inner walls are arranged on the pressing plate base and are respectively called as a main jack 11 and an auxiliary jack 12, and the main jack 11 is the same as the size and the installation position of an on-position jack on the wire spring type relay protection pressing plate base widely used at present and is positioned in the middle of a connecting piece; the auxiliary insertion hole 12 is wider than the main insertion hole 11 and is installed on the right half of the platen base 1.
As shown in fig. 2 and 3, one of the pair of indexing insertion holes 13 is located on one side of the platen base 1, and the other indexing insertion hole 13 is located on the other side of the platen base 1.
As shown in fig. 1 and 4, the press plate base 1 is provided with a positioning hole 14, the press plate connecting sheet 2 is provided with an insulating positioning column 24, and the insulating positioning column 24 is inserted into the positioning hole 14 in the state that the press plate connecting sheet 2 is put into.
When the sizes of the duplex relay protection pressing plate connecting sheet metal structure and the base jack meet the requirement of putting the pressing plate in, the main insertion posts 21 are respectively inserted into one main jack 11 and the auxiliary insertion posts 22 are respectively inserted into one auxiliary jack 12 in the putting state of the pressing plate connecting sheet 2. When the pressing plate connecting sheet metal structure and the base jack have the size that the pressing plate is put into use, the main inserting column 21 is reliably contacted with the copper material on the inner wall of the main jack 11, and the auxiliary inserting column 22 is reliably contacted with the copper material on the inner wall of the auxiliary jack 12; copper materials on the inner wall of the main jack 11 are led to the back side of the screen cabinet through a pair of metal screw rods, enough terminals for connecting hard wires are reserved, and the pair of terminals are connected into a relay protection outlet loop; copper materials on the inner wall of the auxiliary jack 12 are led to the back side of the screen cabinet through a pair of metal screws, enough terminals for connecting hard wires are reserved, and the pair of terminals are connected into a pressing plate state acquisition loop; enough space is reserved between the main jack 11 and the auxiliary jack 12 and metal screws thereof, and reliable insulation at 1000V direct current voltage is ensured; when the duplex relay protection pressing plate is put into use, the pair of metal screws of the main jack 11 is reliably electrically conducted, and meanwhile, the pair of metal screws of the auxiliary jack 12 is reliably electrically conducted. A pair of terminals led out from the main jack 11 is connected into a protection tripping loop through hard wiring; a pair of terminals led out from the auxiliary jack 12 are connected into the switching value input terminals of the protection device through hard wiring, pressure plate state signals are collected through the protection device and are uploaded to a dispatching end through a signal protection substation, and the automatic monitoring of the pressure plate state is realized; if the number of the standby opening amount of the protection device is less than the number of the duplex relay protection pressing plates to be monitored, the state monitoring terminals of the duplex relay protection pressing plates are connected into the measurement and control devices at corresponding intervals through hard wiring to serve as the opening amount of the latter, and pressing plate state signals are uploaded to the monitoring system through the measurement and control system, so that the automatic monitoring of the pressing plate state is realized.
The auxiliary contact technology is widely applied to the field of electrical engineering, the technology is mature, the performance is reliable, the duplex relay protection pressing plate with the state monitoring function is improved from the aspects of reducing the appearance of the pressing plate and improving the operation habit as much as possible, a pair of auxiliary contacts is added for monitoring the state of the pressing plate on the basis of keeping the existing size and the wire spring structure of the wire spring type relay protection pressing plate, and the auxiliary contacts are synchronously linked with the original contacts to form the duplex relay protection pressing plate. In the scheme proposed by the duplex relay protection pressing plate with the state monitoring function of the embodiment, two inverted concave metal structures (a pair of main insertion columns 21 and a pair of auxiliary insertion columns 22) which are insulated from each other are arranged on the pressing plate connecting sheet 2, and two pairs of jacks (a pair of main jacks 11 and a pair of auxiliary jacks 12) with copper materials as inner walls are arranged on the pressing plate base 1; when the pressing plate is put into operation, the two inverted concave metal structures are correspondingly inserted into the two pairs of jacks respectively, copper materials of the two pairs of jacks are led to the back side of the screen cabinet of the pressing plate through the conductive screw rods to form a main contact and an auxiliary contact which are respectively used as a visual breakpoint of an outlet loop and a pressing plate state acquisition contact. When the pressing plate is put in, the two contacts are conducted simultaneously; when the pressing plate is withdrawn, the two contacts are simultaneously disconnected, and the state of the auxiliary contact is judged through the electric loop, so that the throwing and withdrawing states of the corresponding pressing plate can be obtained.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A duplex relay protection pressing plate with a state monitoring function comprises a pressing plate base (1) and a pressing plate connecting piece (2), it is characterized in that the pressure plate base (1) is provided with a pair of main jacks (11), a pair of auxiliary jacks (12) and a pair of position-dividing jacks (13), a pair of main inserting columns (21) and a pair of auxiliary inserting columns (22) are arranged on the pressing plate connecting sheet (2), and a pair of main insertion posts (21) are connected and conducted with each other, a pair of auxiliary insertion posts (22) are connected and conducted with each other, when the pressing plate connecting sheet (2) is in the input state, the main inserting columns (21) are respectively inserted into one main inserting hole (11), and the auxiliary inserting columns (22) are respectively inserted into one auxiliary inserting hole (12), the pressing plate base (1) is provided with connecting terminals corresponding to the main jack (11) and the auxiliary jack (12), the connecting terminals are respectively and electrically connected with the conducting strips arranged in the corresponding main jacks (11) or the auxiliary jacks (12).
2. The duplex relay protection pressing plate with the state monitoring function according to claim 1, wherein the pressing plate connecting piece (2) comprises an insulating housing (23), a metal connecting piece is arranged between the pair of main insertion posts (21), a metal connecting piece is arranged between the pair of auxiliary insertion posts (22), and the pair of main insertion posts (21) and the metal connecting piece thereof, the pair of auxiliary insertion posts (22) and the metal connecting piece thereof are embedded and fixed in the insulating housing (23).
3. The tandem relay protection pressing plate with the state monitoring function according to claim 1, wherein a connecting line between the pair of main insertion posts (21) and a connecting line between the pair of auxiliary insertion posts (22) are arranged in parallel.
4. The tandem relay protection pressing plate with the state monitoring function according to claim 3, wherein a distance between the pair of main insertion posts (21) and a distance between the pair of auxiliary insertion posts (22) are different in size.
5. The duplex relay protection pressing plate with the condition monitoring function according to claim 4, wherein the pair of main insertion posts (21) are located on a central axis of the pressing plate connecting piece (2), and the pair of auxiliary insertion posts (22) are located on one side of the central axis of the pressing plate connecting piece (2).
6. The tandem relay protection pressing plate with the state monitoring function according to claim 1, wherein the length of the main insertion column (21) is longer than that of the auxiliary insertion column (22).
7. The duplex relay protection pressing plate with the condition monitoring function according to claim 1, wherein one of the pair of the indexing insertion holes (13) is located on one side of the pressing plate base (1), and the other indexing insertion hole (13) is located on the other side of the pressing plate base (1).
8. The duplex relay protection pressing plate with the condition monitoring function according to claim 1, wherein a positioning hole (14) is formed in the pressing plate base (1), an insulating positioning column (24) is formed in the pressing plate connecting piece (2), and the insulating positioning column (24) is inserted into the positioning hole (14) in a state where the pressing plate connecting piece (2) is put into operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010191491.8A CN111276930B (en) | 2020-03-18 | 2020-03-18 | Duplex relay protection pressing plate with state monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010191491.8A CN111276930B (en) | 2020-03-18 | 2020-03-18 | Duplex relay protection pressing plate with state monitoring function |
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| Publication Number | Publication Date |
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| CN111276930A true CN111276930A (en) | 2020-06-12 |
| CN111276930B CN111276930B (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010191491.8A Active CN111276930B (en) | 2020-03-18 | 2020-03-18 | Duplex relay protection pressing plate with state monitoring function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313358A (en) * | 2020-03-18 | 2020-06-19 | 国网湖南省电力有限公司 | Double-contact scribing type relay protection pressing plate with state acquisition function |
| CN111641185A (en) * | 2020-06-28 | 2020-09-08 | 广东电网有限责任公司电力调度控制中心 | Duplex outlet pressure plate |
| CN112327083A (en) * | 2020-10-31 | 2021-02-05 | 贵州电网有限责任公司 | Logic verifier for protection trip outlet |
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| CN109378791A (en) * | 2018-11-26 | 2019-02-22 | 南京御弟哥哥电气有限公司 | Detection circuit and electic protection pressing plate are moved back in the throwing of electic protection pressing plate |
| CN110365106A (en) * | 2019-05-28 | 2019-10-22 | 贵州电网有限责任公司 | State monitoring apparatus is moved back in a kind of throwing of transforming plant protecting hard pressing plate |
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| US5904581A (en) * | 1996-07-17 | 1999-05-18 | Minnesota Mining And Manufacturing Company | Electrical interconnection system and device |
| US20100090978A1 (en) * | 2006-11-02 | 2010-04-15 | Kazuhiro Nishikawa | Touch input function-equipped protection panel for electronic device display window |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313358A (en) * | 2020-03-18 | 2020-06-19 | 国网湖南省电力有限公司 | Double-contact scribing type relay protection pressing plate with state acquisition function |
| CN111313358B (en) * | 2020-03-18 | 2022-09-16 | 国网湖南省电力有限公司 | Double-contact scribing type relay protection pressing plate with state acquisition function |
| CN111641185A (en) * | 2020-06-28 | 2020-09-08 | 广东电网有限责任公司电力调度控制中心 | Duplex outlet pressure plate |
| CN112327083A (en) * | 2020-10-31 | 2021-02-05 | 贵州电网有限责任公司 | Logic verifier for protection trip outlet |
| CN112327083B (en) * | 2020-10-31 | 2022-08-26 | 贵州电网有限责任公司 | Logic verifier for protection trip outlet |
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| CN111276930B (en) | 2022-03-11 |
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