CN202231419U - Dual-protection structure of over 220V breaker failure protection loop - Google Patents
Dual-protection structure of over 220V breaker failure protection loop Download PDFInfo
- Publication number
- CN202231419U CN202231419U CN2011202545743U CN201120254574U CN202231419U CN 202231419 U CN202231419 U CN 202231419U CN 2011202545743 U CN2011202545743 U CN 2011202545743U CN 201120254574 U CN201120254574 U CN 201120254574U CN 202231419 U CN202231419 U CN 202231419U
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- protection
- loop
- breaker
- bus differential
- breaker failure
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Abstract
The utility model discloses a dual-protection structure of an over 220V breaker failure protection loop. A breaker failure protection loop comprises a line protection trip-out outlet contact (1) and a breaker failure starting current contact (2). Bus differential protection devices (3) are started by the breaker failure protection loop, and two bus differential protection devices (3) are provided. A switching pressure plate (4) is connected on the breaker failure protection loop. The breaker failure protection loop matches the bus differential protection devices (3) with dual configuration via the switching pressure plate (4). The switching pressure plate is additionally arranged in a failure starting loop, the only breaker failure starting loop is switched to be accessed to one of the bus differential protection devices via the switching pressure plate, thereby guaranteeing that if any of the bus differential protection devices is out of operation, the breaker failure starting loop can always be accessed to the other running bus differential protection device. Therefore, a danger that a breaker lacks failure protection is avoided, and electrical network accidents are prevented from expansion.
Description
Technical field
The utility model relates to the duplicate protection structure in the above breaker fail protection of a kind of 220kV loop, belongs to the electric power protection technical field.
Background technology
In electric power system, must install breaker fail protection according to rules regulation 220kV and above circuit breaker, and want dualization configuration.At present, the mode that generally adopts to this situation is that route protection, bus differential protection all are dualization configurations, and breaker fail protection starts the corresponding dualization bus differential protection of contact deactivation through the route protection failed output of dualization configuration respectively.
But the above breaker failure of early stage 220kV starts the loop to be made up of the mode of the breaker failure starting current contact tandem promoter of route protection tripping operation outlet contact and circuit breaker auxiliary protection, as shown in Figure 2; If can not realize dualization configuration, will cause after the bus differential protection that inserts breaker failure startup loop is out of service because of reasons such as maintenance, circuit breaker will lose the serious consequence of failure protection, possibly cause enlarging power grid accident.In order to adapt to the requirement of present rules; The protective device of early stage single coverization configuration is being done dualization configuration now; Problem with regard to the bus differential protection of the route protection that has single cover configuration and breaker fail protection and dualization configuration does not match must adopt remedial measures.
The utility model content
The technical problem that the utility model will solve provides a kind of simple in structure, easy construction, can realize the problem that the bus differential protection device of breaker fail protection loop and the dualization configuration of single cover configuration matches, and can overcome the deficiency of prior art.
The technical scheme of the utility model is: the breaker fail protection loop comprises route protection tripping operation outlet contact and breaker failure starting current contact; Breaker fail protection loop start bus differential protection device; The quantity of bus differential protection device is two covers; On the breaker fail protection loop, be connected with the switching pressing plate, the breaker fail protection loop matches through the bus differential protection device that switches pressing plate and dualization configuration.
Compare with prior art; Because of the early stage protective device of building transformer station is overlapping configuration to the process of dualization transformation from single; Exist the transformation of dualization of route protection to lag behind the dualization transformation of bus differential protection; Thereby cause the breaker fail protection can not be corresponding one by one, do not reach the purpose of dualization configuration with bus differential protection.What is more, after the bus differential protection that inserts unique breaker failure startup loop is out of service because of certain reason, circuit breaker will lose failure protection.To this problem; The utility model is through increasing a switching pressing plate in malfunctioning startup loop; Switch which cover bus differential protection device of unique breaker failure startup loop access through switching pressing plate; Guarantee that after arbitrary cover bus differential protection is out of service breaker failure starts the bus differential protection that another set of operation can both be inserted in the loop.Thereby avoided circuit breaker to lose the danger of failure protection, prevented the expansion of power grid accident.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation in the existing above breaker fail protection of 220kV loop;
A is a route protection tripping operation outlet contact among Fig. 2; B is a breaker failure starting current contact; C is for inserting protection equipment for busbar.
Embodiment
Embodiment: as shown in Figure 1; The breaker fail protection loop comprises route protection tripping operation outlet contact 1 and breaker failure starting current contact 2, and breaker fail protection loop start bus differential protection device 3: the quantity of bus differential protection device 3 is two covers, distinguishes with A, B respectively among the figure; On the breaker fail protection loop, increase by one and switch pressing plate 4; When switching 4 dozens of pressing plates to A bus differential protection device 3, A bus differential protection device 3 is inserted in malfunctioning loop, when switching 4 dozens of pressing plates to B bus differential protection device 3; B bus differential protection device 3 is inserted in malfunctioning loop, thereby has realized the switching of breaker fail protection loop to bus differential protection device 3.In the actual motion, when A bus differential protection device 3 is out of service, can get to B bus differential protection device 3, make the breaker fail protection loop insert B bus differential protection device 3 switching pressing plate 4; When B bus differential protection device 3 is out of service, can get to A bus differential protection device 3 with switching pressing plate 4, make the breaker fail protection loop insert A bus differential protection device 3, guarantee that breaker fail protection exists all the time.
Claims (1)
1. one kind
More than the 220kVThe duplicate protection structure in breaker fail protection loop; The breaker fail protection loop comprises route protection tripping operation outlet contact (1) and breaker failure starting current contact (2); Breaker fail protection loop start bus differential protection device (3); It is characterized in that: the quantity of bus differential protection device (3) is two covers; On the breaker fail protection loop, be connected with and switch pressing plate (4), the breaker fail protection loop matches through the bus differential protection device (3) that switches pressing plate (4) and dualization configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202545743U CN202231419U (en) | 2011-07-19 | 2011-07-19 | Dual-protection structure of over 220V breaker failure protection loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202545743U CN202231419U (en) | 2011-07-19 | 2011-07-19 | Dual-protection structure of over 220V breaker failure protection loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202231419U true CN202231419U (en) | 2012-05-23 |
Family
ID=46081993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202545743U Expired - Fee Related CN202231419U (en) | 2011-07-19 | 2011-07-19 | Dual-protection structure of over 220V breaker failure protection loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202231419U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618296A (en) * | 2013-12-06 | 2014-03-05 | 国家电网公司 | Breaker failure protection blocking method |
-
2011
- 2011-07-19 CN CN2011202545743U patent/CN202231419U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618296A (en) * | 2013-12-06 | 2014-03-05 | 国家电网公司 | Breaker failure protection blocking method |
| CN103618296B (en) * | 2013-12-06 | 2016-08-17 | 国家电网公司 | Breaker fail protection blocking method |
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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 |
Granted publication date: 20120523 Termination date: 20140719 |
|
| EXPY | Termination of patent right or utility model |