CN204464979U - Breaker body non-whole phase protection loop - Google Patents
Breaker body non-whole phase protection loop Download PDFInfo
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- CN204464979U CN204464979U CN201520219074.4U CN201520219074U CN204464979U CN 204464979 U CN204464979 U CN 204464979U CN 201520219074 U CN201520219074 U CN 201520219074U CN 204464979 U CN204464979 U CN 204464979U
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Abstract
The utility model discloses a kind of breaker body non-whole phase protection loop, the three-phase normally closed auxiliary contact and the three-phase in parallel that comprise circuit breaker parallel connection often drive auxiliary contact, and the non-three phase time relay, non-three phase exit relay and non-three phase relay; The coils from parallel connection of coils of non-three phase exit relay and non-three phase relay, it is extreme that one end connects power-; With the coils from parallel connection of coils of the non-three phase time relay behind the contact of the other end series connection non-three phase time relay, more often drive auxiliary contact with the three-phase of parallel connection and three-phase normally closed auxiliary contact is connected, three-phase normally closed auxiliary contact is connected with power positive end; The three-phase of non-three phase exit relay exports contact and connects, and one end connects tripping relay coil, and the other end connects power positive end through three-phase normally closed auxiliary contact, builds breaker body non-whole phase protection loop.The utility model effectively prevent the misoperation of non-whole phase protection loop, strengthens the reliability of non-whole phase protection, and implement simple, successful, cost is extremely low, is easy to promote.
Description
Technical field
The utility model relates to electro-mechanical arts, is specifically related to breaker body non-whole phase protection loop.
Background technology
Open-phase operation is three-phase mechanism phase-splitting operate generator main switch carrying out closing, in tripping operation process; a phase or two-phase switch is caused not to get togather or non-tripping for a certain reason; cause the serious unbalanced a kind of phenomenon of the failure of stator three-phase current; long-time open-phase operation; very large negative-sequence current will damage electricity generator stator coil; rotor coil is burnt out time serious; fracture macro-axis; so cause serious financial consequences and potential safety hazard in order to avoid open-phase operation, breaker body non-whole phase protection loop is usually adopted to carry out circuit protection.
As shown in Figure 1, traditional breaker body non-whole phase protection loop adopts breaker body auxiliary contact as Protection criteria, and operation principle is:
Circuit breaker self three-phase normally closed auxiliary contact (QF1A, QF1B, QF1C) auxiliary contact (QF2A is often opened with three-phase, QF2B, QF2C) connect again after parallel connection respectively, when switch open-phase operation, normally closed switch has at least one to close, start non-three phase time relay K7, after certain time-delay, time relay auxiliary contact close, start non-three phase exit relay Q7 and non-three phase signal relay X7, the non-three phase exit relay corresponding with operation exports contact (Q7-1, Q7-2, Q7-3) closed, thus tripping circuit breaker runs phase, realize breaker body non-whole phase protection.
In running at the scene; aging and the extraneous or high-intensity magnetic field of certain relay fault, contact oxidation, insulation attenuating, secondary circuit happens occasionally to problems such as relay interference; outlet contact due to program exit relay Q7 is connected directly between in trip(ping) circuit; non-whole phase protection only uses the auxiliary contact of circuit breaker as start-up criterion; do not adopt other condition latch-up protections; therefore these FAQs usually can cause the outlet contact misoperation of non-whole phase protection exit relay, reduce non-whole phase protection reliability.
Utility model content
Technical problem to be solved in the utility model is the outlet contact of traditional breaker body non-whole phase protection circuit outlet relay Q7 is be connected directly between in trip(ping) circuit, easily causes the problem of non-whole phase protection misoperation.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is to provide a kind of breaker body non-whole phase protection loop, the three-phase normally closed auxiliary contact and the three-phase in parallel that comprise circuit breaker parallel connection often drive auxiliary contact, and the non-three phase time relay, non-three phase exit relay and non-three phase relay;
The coils from parallel connection of coils of described non-three phase exit relay and described non-three phase relay, it is extreme that one end connects power-; The other end connect the described non-three phase time relay contact after with the coils from parallel connection of coils of the described non-three phase time relay, the three-phase normally closed auxiliary contact often opening auxiliary contact and described parallel connection again with described three-phase in parallel is composed in series non-three phase decision circuitry, and the three-phase normally closed auxiliary contact of described parallel connection is connected with power positive end;
The three-phase outlet contact parallel join of described non-three phase exit relay, one end is connected with the coil of tripping relay, and the other end is connected with power positive end by the three-phase normally closed auxiliary contact of described parallel connection, builds breaker body non-whole phase protection loop.
In above-mentioned breaker body non-whole phase protection loop, described power-is extreme is more than 220kV with described positive source terminal voltage.
The utility model is by moving on to circuit breaker three-phase normally closed auxiliary contact, non-three phase decision circuitry and non-three phase exit relay export between contact shunt circuit and power positive end, before non-whole phase protection outlet contact, access the normally closed auxiliary contact of circuit breaker carry out atretostomia, make only when circuit breaker open-phase operation, non-three phase decision circuitry just can be made to be communicated with power positive end with non-three phase exit relay outlet contact, guarantee circuit breaker action message tripping operation under non-full-operating state really, effectively prevent because single relay fault, between non-three phase exit relay outlet contact, between auxiliary contacts of circuit breaker, insulation reduces the breaker body non-whole phase protection loop misoperation caused, meanwhile, increase substantially that breaker body non-whole phase protection loop is aging to secondary circuit, the resistivity of the interference of external disturbance, high-intensity magnetic field and human factor etc., enhanced the reliability of breaker body non-whole phase protection.And technical solutions of the utility model implement simple, successful, and cost is extremely low, be easy to promote.
Accompanying drawing explanation
Fig. 1 is traditional breaker body non-whole phase protection circuit diagram;
The breaker body non-whole phase protection circuit diagram that Fig. 2 provides for the utility model.
Embodiment
Below in conjunction with Figure of description, the utility model is described in detail.
As shown in Figure 2, the breaker body non-whole phase protection loop that the utility model provides, comprises the three-phase normally closed auxiliary contact (QF1A, QF1B, QF1C) of circuit breaker self parallel connection, three-phase in parallel often opens auxiliary contact (QF2A, QF2B, QF2C), non-three phase time relay K7, non-three phase exit relay Q7 and non-three phase relay X7;
The coils from parallel connection of coils of described non-three phase exit relay and described non-three phase relay, it is extreme that one end connects power-; The other end connect the described non-three phase time relay contact after with the coils from parallel connection of coils of the described non-three phase time relay, the three-phase normally closed auxiliary contact often opening auxiliary contact and described parallel connection again with described three-phase in parallel is composed in series non-three phase decision circuitry, and the three-phase normally closed auxiliary contact of described parallel connection is connected with power positive end;
The three-phase outlet contact parallel join of described non-three phase exit relay, one end is connected with the coil of tripping relay, and the other end is connected with power positive end by the three-phase normally closed auxiliary contact of described parallel connection, builds breaker body non-whole phase protection loop.The coils from parallel connection of coils of non-three phase exit relay Q7 and non-three phase relay X7, one end connects the extreme K102 of power-; After the contact K7-1 of other end series connection non-three phase time relay K7, with the coils from parallel connection of coils of non-three phase time relay K7, the three-phase normally closed auxiliary contact often opening auxiliary contact and parallel connection again with three-phase in parallel is composed in series non-three phase decision circuitry, and the three-phase normally closed auxiliary contact of parallel connection is connected with power positive end K101;
Three-phase outlet contact parallel join, one end is connected with the coil of tripping relay, and the other end is connected with power positive end by the three-phase normally closed auxiliary contact of described parallel connection, builds breaker body non-whole phase protection loop.After outlet contact (Q7-1, Q7-2, Q7-3) parallel join of the three-phase of non-three phase exit relay Q7; one end is connected with the coil of tripping relay; the other end is connected with power positive end K101 by three-phase normally closed auxiliary contact in parallel; when any phase in outlet contact (Q7-1, Q7-2, Q7-3) of the three-phase of non-three phase exit relay Q7 or two-phase close; tripping relay starts; the operation corresponding with the outlet closing of contact of the three-phase of non-three phase exit relay Q7 is tripped mutually, realizes breaker body non-whole phase protection loop.
The utility model guarantees circuit breaker action message tripping operation under non-full-operating state really, effectively prevents because insulation reduces the breaker body non-whole phase protection loop misoperation caused between single relay fault, non-three phase exit relay outlet contact, between auxiliary contacts of circuit breaker; Meanwhile, increase substantially that breaker body non-whole phase protection loop is aging to secondary circuit, the resistivity of the interference of external disturbance, high-intensity magnetic field and human factor etc., enhanced the reliability of breaker body non-whole phase protection.
In the utility model, power positive end K101 and the extreme K102 voltage of power-are more than 220kV (kilovolt).
Below concrete protection process of the present utility model is described.
When circuit breaker open-phase operation, circuit breaker three-phase is normally closed, often driving auxiliary contact has at least a phase to close, non-three phase decision circuitry is communicated with power positive end with non-three phase exit relay outlet contact, non-three phase time relay K7 starts, after default time delay, the closing of contact of the non-three phase time relay, start non-three phase exit relay Q7 and non-three phase signal relay K7, the non-three phase exit relay corresponding with operation exports the closing of contact, namely contact Q7-1 is exported, Q7-2, any phase of Q7-3 or two-phase close, circuit breaker runs and trips mutually, realize non-whole phase protection.
When circuit breaker runs entirely mutually, there is any relay (K7, Q7 or X7) fault, contact oxidation, insulation is lowered, aging and the extraneous or high-intensity magnetic field of secondary circuit is to problems such as relay interference, during owing to entirely running mutually, circuit breaker three-phase normally closed auxiliary contact (QF1A, QF1B, QF1C) all disconnect, non-three phase decision circuitry cannot be communicated with power positive end with non-three phase exit relay outlet contact, so no matter arbitrarily relay (K7, Q7 or X7) closing of contact, whole breaker body non-whole phase protection loop is all in short-circuit condition, misoperation can not be there is.Only when when circuit breaker open-phase operation; three-phase normally closed auxiliary contact has at least a phase to close; non-three phase decision circuitry just can be made to be communicated with power positive end with non-three phase exit relay outlet contact; guarantee circuit breaker action message tripping operation under non-full-operating state really; effectively prevent the breaker body non-whole phase protection loop misoperation caused because of factors such as single relay fault, external disturbance, improve the reliability of non-whole phase protection.
The utility model is not limited to above-mentioned preferred forms, and anyone should learn the structural change made under enlightenment of the present utility model, and every have identical or close technical scheme with the utility model, all falls within protection range of the present utility model.
Claims (2)
1. breaker body non-whole phase protection loop, is characterized in that, the three-phase normally closed auxiliary contact and the three-phase in parallel that comprise circuit breaker parallel connection often drive auxiliary contact, and the non-three phase time relay, non-three phase exit relay and non-three phase relay;
The coils from parallel connection of coils of described non-three phase exit relay and described non-three phase relay, it is extreme that one end connects power-; The other end connect the described non-three phase time relay contact after with the coils from parallel connection of coils of the described non-three phase time relay, the three-phase normally closed auxiliary contact often opening auxiliary contact and described parallel connection again with described three-phase in parallel is composed in series non-three phase decision circuitry, and the three-phase normally closed auxiliary contact of described parallel connection is connected with power positive end;
The three-phase outlet contact parallel join of described non-three phase exit relay, one end is connected with the coil of tripping relay, and the other end is connected with power positive end by the three-phase normally closed auxiliary contact of described parallel connection, builds breaker body non-whole phase protection loop.
2. breaker body non-whole phase protection loop as claimed in claim 1, is characterized in that, described power-is extreme is more than 220kV with described positive source terminal voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520219074.4U CN204464979U (en) | 2015-04-13 | 2015-04-13 | Breaker body non-whole phase protection loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520219074.4U CN204464979U (en) | 2015-04-13 | 2015-04-13 | Breaker body non-whole phase protection loop |
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| Publication Number | Publication Date |
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| CN204464979U true CN204464979U (en) | 2015-07-08 |
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| CN201520219074.4U Expired - Fee Related CN204464979U (en) | 2015-04-13 | 2015-04-13 | Breaker body non-whole phase protection loop |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846396A (en) * | 2016-03-28 | 2016-08-10 | 大唐贵州野马寨发电有限公司 | Three-phase inconsistent protection control loop for circuit breaker body |
| CN107453333A (en) * | 2017-08-17 | 2017-12-08 | 国家电网公司 | A kind of breaker non-whole phase protection circuit realized using two-position relay |
| CN107959280A (en) * | 2017-12-28 | 2018-04-24 | 贵州电网有限责任公司 | A kind of breaker body three phases un identical protection circuit and control method |
| CN110880742A (en) * | 2019-12-13 | 2020-03-13 | 深圳供电局有限公司 | High-voltage circuit breaker body three-phase inconsistent protection secondary circuit structure |
| CN114123124A (en) * | 2021-11-01 | 2022-03-01 | 北京四方继保工程技术有限公司 | Method for preventing malfunction of zero sequence current protection during circuit breaker hand tripping failure |
-
2015
- 2015-04-13 CN CN201520219074.4U patent/CN204464979U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846396A (en) * | 2016-03-28 | 2016-08-10 | 大唐贵州野马寨发电有限公司 | Three-phase inconsistent protection control loop for circuit breaker body |
| CN107453333A (en) * | 2017-08-17 | 2017-12-08 | 国家电网公司 | A kind of breaker non-whole phase protection circuit realized using two-position relay |
| CN107959280A (en) * | 2017-12-28 | 2018-04-24 | 贵州电网有限责任公司 | A kind of breaker body three phases un identical protection circuit and control method |
| CN107959280B (en) * | 2017-12-28 | 2023-06-16 | 贵州电网有限责任公司 | Three-phase inconsistent protection circuit of circuit breaker body |
| CN110880742A (en) * | 2019-12-13 | 2020-03-13 | 深圳供电局有限公司 | High-voltage circuit breaker body three-phase inconsistent protection secondary circuit structure |
| CN114123124A (en) * | 2021-11-01 | 2022-03-01 | 北京四方继保工程技术有限公司 | Method for preventing malfunction of zero sequence current protection during circuit breaker hand tripping failure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160413 |