CN203787951U - Three-phase inconsistent protective circuit of circuit breaker - Google Patents
Three-phase inconsistent protective circuit of circuit breaker Download PDFInfo
- Publication number
- CN203787951U CN203787951U CN201420175944.8U CN201420175944U CN203787951U CN 203787951 U CN203787951 U CN 203787951U CN 201420175944 U CN201420175944 U CN 201420175944U CN 203787951 U CN203787951 U CN 203787951U
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- circuit breaker
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- 230000001681 protective effect Effects 0.000 title abstract 5
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Abstract
The utility model provides a three-phase inconsistent protective circuit of a circuit breaker. The three-phase inconsistent protective circuit comprises a starting loop, an outlet loop, a tripping loop and a power supply used for supplying power to the loops, wherein the starting loop is connected between positive and negative electrodes of the power supply, and comprises a switching-off normally-closed contact group, a switching-on normally open contact group and a time relay which are sequentially connected in series, the switching-off normally-closed contact group is formed by connecting three phases of switching-off normally-closed contacts in parallel, and the switching-on normally open contact group is formed by connecting three phases of switching--on normally open contact in parallel. The three-phase inconsistent protective circuit is characterized in that: the outlet loop comprises an outlet relay and a normally open contact of the time relay which are connected in series, an input end of the outlet loop is connected on the starting loop at an output side of the switching-off normally-closed contact group, and an output end is connected with the negative electrode of the power supply; and the tripping loop is provided with a normally open contact of the outlet relay and a circuit breaker operating mechanism, an input end of the tripping loop is connected on the starting loop at the output side of the switching-off normally-closed contact group, and an output end is connected with the negative electrode of the power supply. The three-phase inconsistent protective circuit can prevent the normal operation of the circuit breaker from being affected by the abnormal tripping of the circuit breaker since the tripping loop is conducted due to the misoperation of the time relay or the outlet relay.
Description
Technical field
The utility model relates to a kind of circuit breaker three phases un identical protection circuit.
Background technology
In the electrical network of 220kV and above; generally adopt the circuit breaker of phase-splitting operation; due to reasons such as equipment quality and operations; in servicely may occur that three-phase breaker moves inconsistent abnormality; the inconsistent zero sequence causing of the three characteristics of the middle term, negative-sequence current; to have a negative impact to system, even cause protection and automatics malfunction.Harm system being caused when inconsistent for reducing circuit breaker three-phase, should install circuit breaker three phases un identical protection (non-whole phase protection), will occur that the inconsistent circuit breaker of three-phase is out of service, guarantees the normal operation of system.
Shown in Fig. 1, existing non-whole phase protection main circuit will comprise: start loop 1, outlet loop 2, trip(ping) circuit 3 and for the power supply to each loop power supply, wherein, start loop 1, outlet loop 2, trip(ping) circuit 3 parallel with one another between power positive cathode, start separating brake normally-closed contact group, combined floodgate normally opened contact group and time relay K7 that loop 1 comprises series connection successively, separating brake normally-closed contact group is formed in parallel by three-phase separating brake normally-closed contact QF2A, QF2B, QF2C, and combined floodgate normally opened contact group is formed in parallel by three-phase combined floodgate normally opened contact QF1A, QF1B, QF1C; Outlet loop 2 comprises the exit relay Q7 of mutual series connection and the normal opened contact K7-1 of described time relay K7, by time relay K7, controls its break-make; Trip(ping) circuit 3 is provided with normal opened contact Q7-A, Q7-B, Q7-C and the circuit breaker operation mechanism of exit relay Q7, and normal opened contact Q7-A, Q7-B, Q7-C control its break-make by exit relay Q7; There is following defect in above-mentioned non-whole phase protection circuit: when the consistent and time relay K7 misoperation of circuit breaker three, can cause trip(ping) circuit 3 conductings to cause the improper tripping operation of circuit breaker, affect the normal work of circuit breaker; Equally when circuit breaker three is consistent, during exit relay Q7 misoperation, also can cause the improper tripping operation of circuit breaker, affect the normal work of circuit breaker.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of result simple, safe and reliable circuit breaker non-whole phase protection circuit.
The purpose of this utility model realizes by following technical solution:
A kind of circuit breaker three phases un identical protection circuit, comprise and start loop, outlet loop, trip(ping) circuit and for the power supply to each loop power supply, described startup loop is connected between power positive cathode, comprise the separating brake normally-closed contact group of series connection successively, combined floodgate normally opened contact group and the time relay, separating brake normally-closed contact group is formed in parallel by three-phase separating brake normally-closed contact, combined floodgate normally opened contact group is formed in parallel by three-phase combined floodgate normally opened contact, it is characterized in that: described outlet loop comprises the exit relay of mutual series connection and the normal opened contact of the described time relay, its input is connected on the startup loop of separating brake normally-closed contact group outlet side, output is connected with power cathode, described trip(ping) circuit is provided with normal opened contact and the circuit breaker operation mechanism of described exit relay, its input is connected on the startup loop of separating brake normally-closed contact group outlet side, output is connected with power cathode.
Further, the input of described trip(ping) circuit is connected on the startup loop between separating brake normally-closed contact group and combined floodgate normally opened contact group.
Further, the input of described outlet loop is connected on the startup loop between combined floodgate normally opened contact group and the time relay.
Further, described outlet loop is provided with the signal relay in parallel with described exit relay, and signal relay is used for controlling Yi Xiang backstage, telecommunication loop and sends fault-signal.
The utlity model has following beneficial effect:
The input of trip(ping) circuit is connected on the startup loop of separating brake normally-closed contact group outlet side, output is connected with power cathode, so only when at least one phase separating brake normally-closed contact closed (being at least one mutually improper tripping operation of circuit breaker) of separating brake normally-closed contact group, the input of trip(ping) circuit and outlet loop just can connect positive source, trip(ping) circuit and outlet loop can normally be worked, by such scheme, can avoid the time relay or exit relay generation misoperation, and cause trip(ping) circuit conducting, cause the improper tripping operation of circuit breaker, affect the normal work of circuit breaker.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the circuit diagram of existing non-whole phase protection circuit.
The circuit diagram of the non-whole phase protection circuit that Fig. 2 provides for the utility model.
Embodiment
Shown in Fig. 2, a kind of circuit breaker three phases un identical protection circuit, comprises starting loop 3, outlet loop 5, trip(ping) circuit 4 and for the power supply to each loop power supply.
Starting loop 3 is connected between power positive cathode, the separating brake normally-closed contact group, combined floodgate normally opened contact group and the time relay K7 that comprise series connection successively, separating brake normally-closed contact group is formed in parallel by three-phase separating brake normally-closed contact QF2A, QF2B, QF2C, and combined floodgate normally opened contact group is formed in parallel by three-phase combined floodgate normally opened contact QF1A, QF1B, QF1C.
Outlet loop 5 comprises the normal opened contact K7-1 of exit relay Q7, signal relay X7 and time relay K7, exit relay Q7 with after signal relay X7 parallel connection, connect with the normal opened contact K7-1 of time relay K7, signal relay X7 is used for controlling Yi Xiang backstage, telecommunication loop and sends fault-signal, the input of outlet loop 5 connects on the startup loop 3 between combined floodgate normally opened contact group and time relay K7, and output is connected with power cathode.
Trip(ping) circuit 4 is provided with exit relay Q7 normal opened contact Q7-A, Q7-B, Q7-C and circuit breaker operation mechanism parallel with one another, its input is connected on the startup loop 3 between separating brake normally-closed contact group and combined floodgate normally opened contact group, and output is connected with power cathode.
Specific works mode is: when a certain the improper tripping operation of circuit breaker, corresponding separating brake normally-closed contact in separating brake normally-closed contact group is closed, the input of trip(ping) circuit 4 and outlet loop 5 connects positive source, start-up circuit 3 conductings make time relay K7 work, the normal opened contact K7-1 that controls outlet loop 5 time relay K7 is closed, outlet loop 5 conductings make exit relay Q7 work, the exit relay Q7 normal opened contact Q7-A, Q7-B, the Q7-C that control trip(ping) circuit 4 are closed, thereby make the tripping operation of circuit breaker three-phase.
The above, it is only preferred embodiment of the present utility model, therefore can not limit the scope that the utility model is implemented with this, the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.
Claims (4)
1. a circuit breaker three phases un identical protection circuit, comprise and start loop, outlet loop, trip(ping) circuit and for the power supply to each loop power supply, described startup loop is connected between power positive cathode, comprise the separating brake normally-closed contact group of series connection successively, combined floodgate normally opened contact group and the time relay, separating brake normally-closed contact group is formed in parallel by three-phase separating brake normally-closed contact, combined floodgate normally opened contact group is formed in parallel by three-phase combined floodgate normally opened contact, it is characterized in that: described outlet loop comprises the exit relay of mutual series connection and the normal opened contact of the described time relay, its input is connected on the startup loop of separating brake normally-closed contact group outlet side, output is connected with power cathode, described trip(ping) circuit is provided with normal opened contact and the circuit breaker operation mechanism of described exit relay, its input is connected on the startup loop of separating brake normally-closed contact group outlet side, output is connected with power cathode.
2. a kind of circuit breaker three phases un identical protection circuit according to claim 1, is characterized in that: the input of described trip(ping) circuit is connected on the startup loop between separating brake normally-closed contact group and combined floodgate normally opened contact group.
3. a kind of circuit breaker three phases un identical protection circuit according to claim 1 and 2, is characterized in that: the input of described outlet loop is connected on the startup loop between combined floodgate normally opened contact group and the time relay.
4. a kind of circuit breaker three phases un identical protection circuit according to claim 1 and 2; it is characterized in that: described outlet loop is provided with the signal relay in parallel with described exit relay, signal relay is used for controlling Yi Xiang backstage, telecommunication loop and sends fault-signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420175944.8U CN203787951U (en) | 2014-04-11 | 2014-04-11 | Three-phase inconsistent protective circuit of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420175944.8U CN203787951U (en) | 2014-04-11 | 2014-04-11 | Three-phase inconsistent protective circuit of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203787951U true CN203787951U (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420175944.8U Expired - Fee Related CN203787951U (en) | 2014-04-11 | 2014-04-11 | Three-phase inconsistent protective circuit of circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN203787951U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928916A (en) * | 2014-04-11 | 2014-07-16 | 国家电网公司 | Three-phase inconsistency protection circuit of circuit breaker |
| CN104407525A (en) * | 2014-10-11 | 2015-03-11 | 国家电网公司 | Time relay and circuit breaker three-phase inconsistent protection circuit and circuit breaker |
| 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 |
| CN107332352A (en) * | 2017-08-28 | 2017-11-07 | 广东电网有限责任公司潮州供电局 | A kind of determination methods and device for switching non-three phase separating brake |
| CN112881832A (en) * | 2021-01-15 | 2021-06-01 | 国网山西省电力公司晋城供电公司 | Relay protection circuit calibration system |
-
2014
- 2014-04-11 CN CN201420175944.8U patent/CN203787951U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928916A (en) * | 2014-04-11 | 2014-07-16 | 国家电网公司 | Three-phase inconsistency protection circuit of circuit breaker |
| CN104407525A (en) * | 2014-10-11 | 2015-03-11 | 国家电网公司 | Time relay and circuit breaker three-phase inconsistent protection circuit and circuit breaker |
| 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 |
| CN107332352A (en) * | 2017-08-28 | 2017-11-07 | 广东电网有限责任公司潮州供电局 | A kind of determination methods and device for switching non-three phase separating brake |
| CN107332352B (en) * | 2017-08-28 | 2019-10-29 | 广东电网有限责任公司潮州供电局 | A kind of judgment method and device switching non-three phase separating brake |
| CN112881832A (en) * | 2021-01-15 | 2021-06-01 | 国网山西省电力公司晋城供电公司 | Relay protection circuit calibration system |
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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: 20140820 Termination date: 20210411 |