CN215300141U - Circuit about 110kV circuit breaker spare separating brake circuit - Google Patents
Circuit about 110kV circuit breaker spare separating brake circuit Download PDFInfo
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- CN215300141U CN215300141U CN202022689415.8U CN202022689415U CN215300141U CN 215300141 U CN215300141 U CN 215300141U CN 202022689415 U CN202022689415 U CN 202022689415U CN 215300141 U CN215300141 U CN 215300141U
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Abstract
The utility model discloses a circuit about the reserve separating brake return circuit of 110kV circuit breaker, the circuit about the reserve separating brake return circuit of 110kV circuit breaker includes change over switch circuit, first separating brake return circuit and second separating brake return circuit; the change-over switch circuit is electrically connected with the first switching-off loop and the second switching-off loop in a parallel and series mode. Through setting up change over switch circuit, when the first separating brake return circuit of circuit breaker appears controlling back the broken string, can in time switch over to the second separating brake return circuit through change over switch circuit, in time eliminate because the urgent defect that first separating brake return circuit problem leads to, can effectively avoid because the problem of circuit breaker mechanism, the electric wire netting risk that leads to and the personal risk that brings when handling urgent defect. Meanwhile, the contacts of the change-over switch circuit are connected into the first brake separating loop and the second brake separating loop in a parallel connection and series connection mode respectively, and faults caused by the contact problem of the change-over switch can be reduced to the maximum extent.
Description
Technical Field
The utility model relates to a 110kV circuit breaker circuit field especially relates to a circuit about reserve separating brake circuit of 110kV circuit breaker.
Background
When a 110kV line or equipment has a fault, the protection device sends a switching-off command, and the breaker is switched off through a switching-off loop of the breaker to isolate the fault. If before the fault happens, the switch has the open circuit disconnection, and the maintainer can not process the open circuit disconnection fault in time within a limited time, the 110kV circuit breaker can not be reliably opened, the override trip can occur, the accident range is expanded, and higher power grid risk exists.
The existing 110kV circuit breaker is generally provided with two opening circuits of opening 1 and opening 2, but only the opening control circuit of opening 1 can realize remote or local opening operation, the opening control circuit of opening 2 is generally not connected to the control circuit, and cannot realize remote or local opening operation, which is equivalent to the opening control circuit of opening 2 not playing any role. When the control circuit of branch 1 breaks down and the circuit breaker needs to be overhauled in a power failure mode, the circuit breaker can not be separated through the branch 2 brake control circuit, and only the local manual brake separation 2 can be adopted to separate the circuit breaker, so that the greater equipment risk and operation risk exist.
SUMMERY OF THE UTILITY MODEL
To the not enough of above-mentioned prior art, this patent has set up a circuit about 110kV circuit breaker reserve separating brake return circuit, through setting up change over switch circuit, when the first separating brake return circuit of circuit breaker appears controlling back the broken string, can in time switch over to the second separating brake return circuit through change over switch circuit, in time eliminate because the urgent defect that first separating brake return circuit problem leads to, can effectively avoid because the problem of circuit breaker mechanism, the personal risk that brings when the electric wire netting risk that leads to and handling urgent defect. Meanwhile, the contacts of the change-over switch circuit are connected into the first brake separating loop and the second brake separating loop in a parallel connection and series connection mode respectively, and faults caused by the contact problem of the change-over switch can be reduced to the maximum extent.
In order to achieve the above object, the present invention provides a circuit for a backup opening loop of a 110kV circuit breaker, which includes a transfer switch circuit, a first opening loop and a second opening loop;
the change-over switch circuit is electrically connected with the first switching-off loop and the second switching-off loop in a parallel and series mode.
As a preferred technical solution of the present invention, the transfer switch circuit includes a first transfer switch, a second transfer switch, a third transfer switch and a fourth transfer switch;
the first change-over switch and the second change-over switch are connected in parallel; the third transfer switch and the fourth transfer switch are connected in series; the first changeover switch and the second changeover switch are connected in parallel with the third changeover switch and the fourth changeover switch.
As a preferred technical solution of the present invention, the first opening circuit includes a first terminal, a first low-voltage latching contact, a first high-voltage latching contact, a first auxiliary switch, and a first opening coil;
the input end of the first terminal is connected with the output ends of the first change-over switch and the second change-over switch parallel circuit; the output end of the first terminal is connected with the input end of the first low-voltage latching contact, and the output end of the first low-voltage latching contact is connected with the input end of the first high-voltage latching contact; the output end of the first high-voltage locking contact is electrically connected with the input end of the first auxiliary switch, and the output end of the first auxiliary switch is electrically connected with the input end of the first opening coil.
As a preferred technical solution of the present invention, the first opening circuit further includes a first connecting piece;
the input end of the first connecting sheet is connected with the input end of the first low-voltage locking contact, and the output end of the first connecting sheet is connected with the output end of the first high-voltage locking contact.
As a preferred technical solution of the present invention, the second switching loop includes a second terminal, a second low-voltage latching contact, a second high-voltage latching contact, a second auxiliary switch, and a second switching-off coil;
the input end of the second terminal is connected with the output ends of the second change-over switch and the second change-over switch parallel circuit; the output end of the second terminal is connected with the input end of the second low-voltage latching contact, and the output end of the second low-voltage latching contact is connected with the input end of the second high-voltage latching contact; the output end of the second high-voltage locking contact is electrically connected with the input end of the second auxiliary switch, and the output end of the second auxiliary switch is electrically connected with the input end of the second opening coil.
As a preferred technical solution of the present invention, the second shunt circuit further includes a second connecting piece;
the input end of the second connecting sheet is connected with the input end of the second low-voltage locking contact, and the output end of the second connecting sheet is connected with the output end of the second high-voltage locking contact.
As a preferred technical solution of the present invention, the first connecting piece is an RBT4SW switch type terminal;
and/or the second connecting sheet is an RBT4SW switch type terminal.
As a preferred technical scheme of the utility model, the first auxiliary switch is F9-22 III/G;
and/or the second auxiliary switch is F9-22 III/G.
To sum up, because the utility model adopts the above technical scheme, the utility model discloses following technological effect has: through setting up change over switch circuit, when the first separating brake return circuit of circuit breaker appears controlling back the broken string, can in time switch over to the second separating brake return circuit through change over switch circuit, in time eliminate because the urgent defect that first separating brake return circuit problem leads to, can effectively avoid because the problem of circuit breaker mechanism, the electric wire netting risk that leads to and the personal risk that brings when handling urgent defect. Meanwhile, the contacts of the change-over switch circuit are connected into the first brake separating loop and the second brake separating loop in a parallel connection and series connection mode respectively, and faults caused by the contact problem of the change-over switch can be reduced to the maximum extent.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic connection diagram of the circuit of the standby opening loop of the 110kV circuit breaker of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic connection diagram of a circuit of a standby opening circuit of a 110kV circuit breaker according to the present invention.
Specifically, the circuit related to the standby switching-off loop of the 110kV circuit breaker shown in the experimental novel embodiment includes a transfer switch circuit 1, a first switching-off loop 2 and a second switching-off loop 3; the changeover switch circuit 1 is electrically connected in parallel and in series with the first and second shunt loops 2 and 3. Through setting up change over switch circuit 1, when the first separating brake return circuit 2 of circuit breaker appears controlling back the broken string, can in time switch over to second separating brake return circuit 3 through change over switch circuit 1, in time eliminate because the urgent defect that first separating brake return circuit 2 problem leads to, can effectively avoid because the problem of circuit breaker mechanism, the electric wire netting risk that leads to and the personal risk that brings when handling urgent defect.
Specifically, the change-over switch circuit 1 includes a first change-over switch 11, a second change-over switch 12, a third change-over switch 13, and a fourth change-over switch 14; the first changeover switch 11 and the second changeover switch 12 are connected in parallel; the third changeover switch 13 and the fourth changeover switch 14 are connected in series; the first changeover switch 11 and the second changeover switch 12 are connected in parallel with the third changeover switch 13 and the fourth changeover switch 14.
Meanwhile, the contacts of the change-over switch circuit 1 are connected into the first brake separating loop 2 and the second brake separating loop 3 in a parallel connection and series connection mode respectively, and faults caused by the contact problem of the change-over switch can be reduced to the greatest extent.
Furthermore, on the basis of the original circuit, by adding small improvement of the change-over switch circuit 1, the large problem in actual work can be solved, the novel circuit belongs to an original achievement, and is low in cost, good in benefit, simple and easy to implement, low in reconstruction difficulty, and only a plurality of change-over switches and a plurality of secondary cables need to be purchased in the whole reconstruction.
Specifically, the first opening circuit 2 includes a first terminal 21, a first low-voltage latching contact 22, a first high-voltage latching contact 23, a first auxiliary switch 24 and a first opening coil 25; an input end of the first terminal 21 is connected to an output end of the parallel circuit of the first changeover switch 11 and the second changeover switch 12; the output end of the first terminal 21 is connected with the input end of the first low-voltage latching contact 22, and the output end of the first low-voltage latching contact 22 is connected with the input end of the first high-voltage latching contact 23; the output of the first high-voltage blocking contact 23 is electrically connected to the input of a first auxiliary switch 24, and the output of the first auxiliary switch 24 is electrically connected to the input of a first switching coil 25.
Specifically, the first opening circuit 2 further includes a first connecting piece 26; the input of the first connecting tab 26 is connected to the input of the first low voltage latch contact 22, and the output of the first connecting tab 26 is connected to the output of the first high voltage latch contact 23.
Further, the operation of the first switching loop 2 is described as follows: the positive electricity from the protection device passes through the first change-over switch 11 and the second change-over switch 12, passes through the first terminal 21, passes through the first low-voltage latching contact 22 and the first high-voltage latching contact 23 (under normal conditions, the first low-voltage latching contact 22 and the first high-voltage latching contact 23 do not work), passes through the first auxiliary switch 24, and then the first opening coil 25 is electrified to drive the switch mechanism to open.
Specifically, the second shunt loop 3 includes a second terminal 31, a second low-voltage latching contact 32, a second high-voltage latching contact 33, a second auxiliary switch 34 and a second shunt coil 35; the input of the second terminal 31 is connected to the output of the parallel circuit of the second changeover switch 12 and the second changeover switch 12; the output of the second terminal 31 is connected to the input of a second low voltage latching contact 32, and the output of the second low voltage latching contact 32 is connected to the input of a second high voltage latching contact 33; the output terminal of the second high-voltage latch contact 33 is electrically connected to the input terminal of the second auxiliary switch 34, and the output terminal of the second auxiliary switch 34 is electrically connected to the input terminal of the second switching coil 35.
Further, the operation of the second switching loop 3 is described as follows: the positive electricity from the protection device passes through the third change-over switch 13 and the fourth change-over switch 14, passes through the second terminal 31, passes through the second low-voltage latching contact 32 and the second high-voltage latching contact 33 (under the normal condition, the second low-voltage latching contact 32 and the second high-voltage latching contact 33 are closed), passes through the second auxiliary switch 34, and then the second opening coil 35 is electrified to drive the switch mechanism to open.
Specifically, the second shunt circuit 3 further includes a second connecting piece 36; the input of the second connecting piece 36 is connected to the input of the second low voltage latch 32, and the output of the second connecting piece 36 is connected to the output of the second high voltage latch 33.
Specifically, the first connecting piece 26 is an RBT4SW switch-type terminal; and/or second strap 36 is an RBT4SW switch type terminal.
Furthermore, the first connecting tab 26 and the second connecting tab 36 are means for switching in and out the corresponding protection function, and their purpose is to act as a switch for connection and disconnection in the protection circuit. If the connecting piece of the quick-break protection is opened, the switch cannot jump when the load side of the switch cabinet is short-circuited. But can cause override trip and further cause large-area power failure of the unit.
Specifically, the first auxiliary switch 24 is F9-22 III/G; and/or the second auxiliary switch 34 is F9-22 III/G.
Further, the first auxiliary switch 24 and the second auxiliary switch 34 are part of a main switch, and are disposed in an electric power device such as a high-or medium-voltage circuit breaker or a disconnector to function as an opening/closing, signal control, and interlock protection of a secondary control circuit, and also to function as a combination switch or a change-over switch.
The utility model discloses, through setting up change over switch circuit, when the first separating brake return circuit of circuit breaker appears controlling back the broken string, can in time switch over to second separating brake return circuit through change over switch circuit, in time eliminate because the urgent defect that first separating brake return circuit problem leads to, can effectively avoid because the problem of circuit breaker mechanism, the electric wire netting risk that leads to and the personal risk that brings when handling urgent defect. Meanwhile, the contacts of the change-over switch circuit are connected into the first brake separating loop and the second brake separating loop in a parallel connection and series connection mode respectively, and faults caused by the contact problem of the change-over switch can be reduced to the maximum extent.
The circuit related to the backup separating brake loop of the 110kV circuit breaker provided by the embodiment of the present invention is introduced in detail above, and a specific embodiment should be adopted herein to explain the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.
Claims (7)
1. A circuit related to a 110kV breaker standby opening loop is characterized in that the circuit related to the 110kV breaker standby opening loop comprises a transfer switch circuit, a first opening loop and a second opening loop;
the change-over switch circuit is electrically connected with the first switching-off loop and the second switching-off loop in a parallel and series mode.
2. The circuit as claimed in claim 1, wherein the change-over switch circuit comprises a first change-over switch, a second change-over switch, a third change-over switch and a fourth change-over switch;
the first change-over switch and the second change-over switch are connected in parallel; the third transfer switch and the fourth transfer switch are connected in series; the first changeover switch and the second changeover switch are connected in parallel with the third changeover switch and the fourth changeover switch.
3. The circuit as claimed in claim 2, wherein the first opening circuit comprises a first terminal, a first low voltage blocking contact, a first high voltage blocking contact, a first auxiliary switch and a first opening coil;
the input end of the first terminal is connected with the output ends of the first change-over switch and the second change-over switch parallel circuit; the output end of the first terminal is connected with the input end of the first low-voltage latching contact, and the output end of the first low-voltage latching contact is connected with the input end of the first high-voltage latching contact; the output end of the first high-voltage locking contact is electrically connected with the input end of the first auxiliary switch, and the output end of the first auxiliary switch is electrically connected with the input end of the first opening coil.
4. The circuit as claimed in claim 3, wherein the first opening circuit further comprises a first connecting piece;
the input end of the first connecting sheet is connected with the input end of the first low-voltage locking contact, and the output end of the first connecting sheet is connected with the output end of the first high-voltage locking contact.
5. The circuit as claimed in claim 2, wherein the second breaking loop comprises a second terminal, a second low voltage latching contact, a second high voltage latching contact, a second auxiliary switch and a second breaking coil;
the input end of the second terminal is connected with the output ends of the second change-over switch and the second change-over switch parallel circuit; the output end of the second terminal is connected with the input end of the second low-voltage latching contact, and the output end of the second low-voltage latching contact is connected with the input end of the second high-voltage latching contact; the output end of the second high-voltage locking contact is electrically connected with the input end of the second auxiliary switch, and the output end of the second auxiliary switch is electrically connected with the input end of the second opening coil.
6. The circuit as claimed in claim 5, wherein the second opening loop further comprises a second connecting piece;
the input end of the second connecting sheet is connected with the input end of the second low-voltage locking contact, and the output end of the second connecting sheet is connected with the output end of the second high-voltage locking contact.
7. The circuit as claimed in claim 6, characterized in that said first connection tab is a terminal of RBT4SW switch type;
and/or the second connecting sheet is an RBT4SW switch type terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022689415.8U CN215300141U (en) | 2020-11-19 | 2020-11-19 | Circuit about 110kV circuit breaker spare separating brake circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022689415.8U CN215300141U (en) | 2020-11-19 | 2020-11-19 | Circuit about 110kV circuit breaker spare separating brake circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215300141U true CN215300141U (en) | 2021-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022689415.8U Active CN215300141U (en) | 2020-11-19 | 2020-11-19 | Circuit about 110kV circuit breaker spare separating brake circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215300141U (en) |
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2020
- 2020-11-19 CN CN202022689415.8U patent/CN215300141U/en active Active
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