CN201584386U - Locking device for circuit breaker in case of over time switching-on - Google Patents
Locking device for circuit breaker in case of over time switching-on Download PDFInfo
- Publication number
- CN201584386U CN201584386U CN2009202766240U CN200920276624U CN201584386U CN 201584386 U CN201584386 U CN 201584386U CN 2009202766240 U CN2009202766240 U CN 2009202766240U CN 200920276624 U CN200920276624 U CN 200920276624U CN 201584386 U CN201584386 U CN 201584386U
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- Prior art keywords
- relay
- circuit breaker
- loop
- locking
- time
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- Expired - Fee Related
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Abstract
The utility model discloses a locking device for a circuit breaker in case of over time witching-on. A time relay is arranged in the switching-on loop of the circuit breaker; the normally open contact of the time relay is arranged in the over time locking loop of the circuit breaker, and is connected with a locking relay; the normally open contact I of the locking relay and the normally open contact of the time relay are arranged in parallel; and the normally closed contact of the locking relay is connected in series with the witching-on loop of the circuit breaker. In the utility model, the time relay and the locking relay are arranged in an original control loop, so that the switching-on loop is switched off under the situation of over time switching-on of the circuit breaker, the over time locking loop realizes self preservation, and only when switching-on pulses are removed, the magnetism of the locking relay is lost, and the two contact points of the locking relay can be repositioned, therefore, a switching-on coil is prevented from being repeatedly electrified; and the phenomenon that the switching-on coil is burned out is completely impeded.
Description
Technical field
The utility model relates to a kind of a kind of locking device under the overtime situation of breaker closing.
Background technology
As shown in Figure 1; present employed breaker control circuit all has anti-jump locking device; it only solved because of operation-control switch do not reset or control the contact, block the automatics contact; this moment, the protection action made the problem of circuit breaker " jump "; then can not solve because of the operating mechanism stoppage circuit breaker and refuse to close, the long and problem damaged of closing coil electrification time.By the statistics that the unattended substation circuit breaker is refused to close, we find that 110KV, 35KV, 10KV circuit breaker are refused to close because of the operating mechanism fault and burn out coil 15 times, damage burning out closing coil 6 times because of energy storage position switch contact.Investigation assert that damaging the incidence that burns out closing coil because of operating mechanism fault and energy storage position switch contact is 100%.
Summary of the invention
The purpose of this utility model provides a kind of under the overtime situation of breaker closing, can prevent the locking device that closing coil burns out.
For achieving the above object, the utility model is by the following technical solutions:
The utility model is provided with the time relay in the breaker closing loop, its time relay normally open contact is arranged in the overtime locked loop of circuit breaker, described time relay normally opened contact is connected with blocking relay, its blocking relay normally opened contact I and time relay normally opened contact are arranged in parallel, and its blocking relay normally-closed contact series connection is arranged in the breaker closing loop.
Above-mentioned blocking relay also is provided with blocking relay normally opened contact II, and blocking relay normally opened contact II is arranged in the show circuit.
Adopt the utility model of technique scheme, because the time relay and blocking relay are set in original control loop, like this under the overtime situation of breaker closing, closing circuit keeps disconnecting, overtime locked loop is realized self-sustaining, has only closing pulse to remove just loss of excitation of back blocking relay, two contacts ability involutions of its blocking relay, therefore avoid the repeatedly charged of closing coil, thereby stopped the phenomenon that closing coil burns out.
Description of drawings
Fig. 1 is the schematic diagram of breaker control circuit in the prior art;
Fig. 2 is a schematic diagram of the present utility model;
Fig. 3 is a winding diagram of the present utility model.
Embodiment
As shown in Figure 2, the utility model is provided with time relay KT in the breaker closing loop, the terminal of time relay KT connects the closing coil positive pole, another terminal connects control bus negative pole, its time, relay normally open contact KT1 was arranged in the overtime locked loop of circuit breaker, and was connected with breaker closing loop auxiliary contact.And time relay normally opened contact KT1 is connected with the terminal of blocking relay KM, and another terminal of blocking relay KM connects control bus negative pole, and blocking relay KM is arranged in the overtime locked loop of circuit breaker.Its blocking relay normally opened contact I KM2 and time relay normally opened contact KT1 are arranged in parallel, and its blocking relay normally-closed contact KM1 series connection is arranged in the breaker closing loop.
Operation principle of the present utility model is:
After closing pulse sends, closing coil is charged, while time relay KT excitation, electrification time to closing coil is carried out timing, reach setting-up time promptly close a floodgate overtime after, time relay normally opened contact KT1 closure, blocking relay KM excitation, its blocking relay normally-closed contact KM1 opens the closure with blocking relay normally opened contact I KM2.Blocking relay normally-closed contact KM1 opens the back and disconnects closing circuit, closing coil loss of excitation.After the blocking relay normally opened contact I KM2 closure, blocking relay KM has realized self-sustaining.Have only closing pulse to remove just loss of excitation of back blocking relay KM, therefore the involution of blocking relay normally-closed contact KM1, blocking relay normally opened contact I KM2 ability has avoided the repeatedly charged of closing coil.
Need to prove,, should keep operation time limit to finish the combined floodgate required time, damage the time less than the excitation of closing coil greater than switch for the time set of time relay KT.
In addition, above-mentioned blocking relay KM can also be provided with blocking relay normally opened contact IIKM3, blocking relay normally opened contact II KM3 is arranged in the show circuit, after blocking relay KM excitation, blocking relay normally opened contact IIKM3 closure, show circuit is worked, and can demonstrate the state of current time closing coil.This show circuit can be LCD or charactron or the like.
Claims (2)
1. overtime locking device of breaker closing, it is characterized in that: the time relay (KT) is set in the breaker closing loop, its time relay normally open contact (KT1) is arranged in the overtime locked loop of circuit breaker, described time relay normally opened contact (KT1) is connected with blocking relay (KM), its blocking relay normally opened contact I (KM2) is arranged in parallel with time relay normally opened contact (KT1), and its blocking relay normally-closed contact (KM1) series connection is arranged in the breaker closing loop.
2. the overtime locking device of breaker closing according to claim 1 is characterized in that: described blocking relay (KM) also is provided with blocking relay normally opened contact II (KM3), and blocking relay normally opened contact II (KM3) is arranged in the show circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202766240U CN201584386U (en) | 2009-12-08 | 2009-12-08 | Locking device for circuit breaker in case of over time switching-on |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202766240U CN201584386U (en) | 2009-12-08 | 2009-12-08 | Locking device for circuit breaker in case of over time switching-on |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201584386U true CN201584386U (en) | 2010-09-15 |
Family
ID=42726398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202766240U Expired - Fee Related CN201584386U (en) | 2009-12-08 | 2009-12-08 | Locking device for circuit breaker in case of over time switching-on |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201584386U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881535A (en) * | 2012-10-15 | 2013-01-16 | 江苏省如高高压电器有限公司 | Device for protecting breaker coil |
| CN114023608A (en) * | 2021-09-23 | 2022-02-08 | 河南平高电气股份有限公司 | High-voltage circuit breaker and locking control system thereof |
-
2009
- 2009-12-08 CN CN2009202766240U patent/CN201584386U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881535A (en) * | 2012-10-15 | 2013-01-16 | 江苏省如高高压电器有限公司 | Device for protecting breaker coil |
| CN114023608A (en) * | 2021-09-23 | 2022-02-08 | 河南平高电气股份有限公司 | High-voltage circuit breaker and locking control system thereof |
| CN114023608B (en) * | 2021-09-23 | 2024-05-24 | 河南平高电气股份有限公司 | High-voltage circuit breaker and locking control system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20101208 |