CN208874279U - An improved circuit breaker body three-phase inconsistent outlet circuit - Google Patents
An improved circuit breaker body three-phase inconsistent outlet circuit Download PDFInfo
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- CN208874279U CN208874279U CN201821402945.6U CN201821402945U CN208874279U CN 208874279 U CN208874279 U CN 208874279U CN 201821402945 U CN201821402945 U CN 201821402945U CN 208874279 U CN208874279 U CN 208874279U
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- breaker
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- phase lines
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Abstract
The utility model discloses a kind of improved breaker body unbalanced three-phase lines outlet loops; it is related to high-voltage circuitbreaker field; aiming at the problem that leading to breaker mistrip when existing equipment is easy and DC system grounding, secondary circuit Abnormal Insulation occurs in Abnormal Insulation or the shake of contact exception, substation between contact; using being in series with unbalanced three-phase lines detection unit in control of export circuit; the unit is able to detect unbalanced three-phase lines state, can be switched on or switched off control of export circuit by the unit.It can be distinguished in circuit by unbalanced three-phase lines detection unit with the presence or absence of unbalanced three-phase lines state, decide whether to trigger breaker open operation coil energized action by the logical consequence combination unbalanced three-phase lines exit relay contact and locking relay contact of the state, program structure is simple, it is easy to improve on existing equipment, and the operation is stable, it is easy to operate.
Description
Technical field
The utility model relates to high-voltage circuitbreaker field, in particular to a kind of improved breaker body unbalanced three-phase lines go out
Mouth circuit.
Background technique
220kV and above breaker use split-phase operating mechanism, in operation it is possible that three phase positions
Inconsistent state, system will appear biggish negative phase-sequence and zero-sequence component at this time, to generate certain harm to electrical equipment, together
When be also possible to lead to the protective device malfunction of other routes, therefore at present in 220kV and above split-phase operating mechanism
Breaker be each equipped with three phases un identical protection, and require configuration breaker body three phases un identical protection, at present ontology
Three phases un identical protection is generally divided into start loop and outlet trip(ping) circuit, and wherein start loop is normally opened, normal by breaker three-phase
It closes auxiliary contact to constitute with the time relay, exit relay in series and parallel, outlet trip(ping) circuit is connected by exit relay contact
Trip(ping) circuit, as shown in Figure 1.In practice, it has been found that using above-mentioned circuit in normal operation in case of following several situations
It will lead to breaker mistrip: 1) unbalanced three-phase lines relay itself quality problems (Abnormal Insulation between contact in normal operation
Or contact is shaken extremely)；2) DC system grounding occurs in substation, causes the actuating of relay；3) secondary circuit Abnormal Insulation.
It is therefore desirable to be improved to existing ontology three phases un identical protection outlet loop, to avoid malfunction caused by the above problem
Make.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of improved breaker body unbalanced three-phase lines outlet loop,
Adopt the following technical scheme that realization:
A kind of improved breaker body unbalanced three-phase lines outlet loop, including connect by unbalanced three-phase lines exit relay
Point, breaker open operation coil, locking relay contact, the normally opened auxiliary contact of breaker are serially connected in control power supply positive and negative electrode
Middle formation control of export circuit is also in series with unbalanced three-phase lines detection unit in the control of export circuit, which can examine
Unbalanced three-phase lines state is surveyed, the control of export circuit can be switched on or switched off by the unit.
It can be distinguished in circuit by unbalanced three-phase lines detection unit with the presence or absence of unbalanced three-phase lines state, pass through the state
Logical consequence combination unbalanced three-phase lines exit relay contact and locking relay contact decide whether to trigger breaker point
Brake cable circle energized action, program structure is simple, is easy to improve on existing equipment, and the operation is stable, easy to operate.
Preferably, the unbalanced three-phase lines detection unit includes that the normally opened auxiliary contact of breaker first, breaker second are normal
The normally closed auxiliary of auxiliary contact, the normally opened auxiliary contact of breaker third, the normally closed auxiliary contact of breaker first, breaker second is opened to connect
Point, the normally closed auxiliary contact of breaker third；
The normally opened auxiliary contact of the breaker first, the normally opened auxiliary contact of breaker second, the normally opened auxiliary of breaker third
Contact three formation normally opened contact shunt circuit parallel with one another；
The normally closed auxiliary contact of the breaker first, the normally closed auxiliary contact of breaker second, the normally closed auxiliary of breaker third
Contact three formation normally-closed contact shunt circuit parallel with one another；
The normally opened contact shunt circuit and the normally-closed contact shunt circuit, which are serially connected, constitutes the unbalanced three-phase lines
Detection unit.
Preferably, the unbalanced three-phase lines detection unit is connected on control positive pole and unbalanced three-phase lines exit relay
Between contact.
The utility model beneficial effect includes: that structure is simple, low in cost, easy to operate, and stability is good, convenient for assembling and
Maintenance.
Detailed description of the invention
Fig. 1 is the electrical block diagram of existing outlet loop；
Fig. 2 is embodiment general structure schematic diagram provided by the utility model.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, implement below in conjunction with the utility model
Fig. 1~2 in example, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Usually it is described and illustrated herein in the accompanying drawings
The detailed description of the embodiments of the present invention be not intended to limit the range of claimed invention, but only
Indicate the selected embodiment of the utility model.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, is fallen within the protection scope of the utility model.
As shown in Fig. 2, a kind of improved breaker body unbalanced three-phase lines outlet loop, including exported by unbalanced three-phase lines
Relay tip K61, breaker open operation coil TQ, locking relay contact K10, the normally opened auxiliary contact DL1A of breaker mutually go here and there
It is coupled in control power supply positive and negative electrode and forms control of export circuit, it is single that unbalanced three-phase lines detection is also in series in control of export circuit
Member.Unbalanced three-phase lines detection unit includes the normally opened auxiliary contact DL1A/01 of breaker first, the normally opened auxiliary contact of breaker second
The normally opened auxiliary contact DL1C/03 of DL1B/02, breaker third, the normally closed auxiliary contact DL1A/11 of breaker first, breaker
Two normally closed auxiliary contact DL1B/12, the normally closed auxiliary contact DL1C/13 of breaker third.The normally opened auxiliary contact of breaker first
DL1A/01, the normally opened auxiliary contact DL1B/02 of breaker second, the normally opened auxiliary contact DL1C/03 three of breaker third are mutually simultaneously
Connection forms normally opened contact shunt circuit.The normally closed auxiliary contact DL1A/11 of breaker first, the normally closed auxiliary contact of breaker second
The normally closed auxiliary contact DL1C/13 three of DL1B/12, breaker third formation normally-closed contact shunt circuit parallel with one another.Normally opened touching
Point shunt circuit and normally-closed contact shunt circuit, which are serially connected, constitutes unbalanced three-phase lines detection unit.For the ease of wiring, three-phase
Inconsistent detection unit is connected between control positive pole and unbalanced three-phase lines exit relay contact K61.
When work, in the case where normal close a floodgate, since normally opened, the normally closed auxiliary contact of breaker are all series relationships,
The circuit be in an off state always (by taking A phase as an example, when DL1A/01 closure when, DL1A/11 disconnect, be constantly in disconnection shape
State), it will not the inconsistent relay of the three characteristics of the middle term itself quality problems or other abnormal causes and malfunction.And when a certain phase in breaker
Do not close a floodgate, by taking B phase as an example: DL1B/02 is disconnected, and DL1B/12 closure, electric current flows through DL1B/12 from DL1A/01, DL1C/03,
Obtain TQ coil electric, to realize that failure self-insurance is tripped.
As described above, the program can be distinguished in circuit by unbalanced three-phase lines detection unit with the presence or absence of unbalanced three-phase lines
State is by the decision of the logical consequence combination unbalanced three-phase lines exit relay contact and locking relay contact of the state
No triggering breaker open operation coil energized action, program structure is simple, is easy to improve on existing equipment, and it is steady to work
It is fixed, it is easy to operate.
Claims (3)
1. a kind of improved breaker body unbalanced three-phase lines outlet loop, including by unbalanced three-phase lines exit relay contact
(K61), breaker open operation coil (TQ), locking relay contact (K10), the normally opened auxiliary contact of breaker (DL1A) are serially connected
Control of export circuit is formed in control power supply positive and negative electrode, it is characterised in that:
It is also in series with unbalanced three-phase lines detection unit in the control of export circuit, which is able to detect unbalanced three-phase lines shape
State can be switched on or switched off the control of export circuit by the unit.
2. a kind of improved breaker body unbalanced three-phase lines outlet loop according to claim 1, it is characterised in that: institute
Stating unbalanced three-phase lines detection unit includes that the normally opened auxiliary of the first normally opened auxiliary contact of breaker (DL1A/01), breaker second connects
Point (DL1B/02), the normally opened auxiliary contact of breaker third (DL1C/03), the first normally closed auxiliary contact of breaker (DL1A/11),
The second normally closed auxiliary contact of breaker (DL1B/12), the normally closed auxiliary contact of breaker third (DL1C/13)；
The first normally opened auxiliary contact of breaker (DL1A/01), the second normally opened auxiliary contact of breaker (DL1B/02), open circuit
The normally opened auxiliary contact of device third (DL1C/03) three formation normally opened contact shunt circuit parallel with one another；
The first normally closed auxiliary contact of breaker (DL1A/11), the second normally closed auxiliary contact of breaker (DL1B/12), open circuit
The normally closed auxiliary contact of device third (DL1C/13) three formation normally-closed contact shunt circuit parallel with one another；
The normally opened contact shunt circuit and the normally-closed contact shunt circuit, which are serially connected, constitutes the unbalanced three-phase lines detection
Unit.
3. a kind of improved breaker body unbalanced three-phase lines outlet loop according to claim 1, it is characterised in that: institute
Unbalanced three-phase lines detection unit is stated to be connected between control positive pole and unbalanced three-phase lines exit relay contact (K61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821402945.6U CN208874279U (en) | 2018-08-29 | 2018-08-29 | An improved circuit breaker body three-phase inconsistent outlet circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821402945.6U CN208874279U (en) | 2018-08-29 | 2018-08-29 | An improved circuit breaker body three-phase inconsistent outlet circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208874279U true CN208874279U (en) | 2019-05-17 |
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ID=66466007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821402945.6U Active CN208874279U (en) | 2018-08-29 | 2018-08-29 | An improved circuit breaker body three-phase inconsistent outlet circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208874279U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829351A (en) * | 2019-10-11 | 2020-02-21 | 中国电力科学研究院有限公司 | Intelligent control system and method for primary and secondary fusion circuit breaker |
| CN113232694A (en) * | 2021-06-02 | 2021-08-10 | 中车青岛四方机车车辆股份有限公司 | Three-phase motor power supply system |
-
2018
- 2018-08-29 CN CN201821402945.6U patent/CN208874279U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829351A (en) * | 2019-10-11 | 2020-02-21 | 中国电力科学研究院有限公司 | Intelligent control system and method for primary and secondary fusion circuit breaker |
| CN113232694A (en) * | 2021-06-02 | 2021-08-10 | 中车青岛四方机车车辆股份有限公司 | Three-phase motor power supply system |
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