CN103928916A - Three-phase inconsistency protection circuit of circuit breaker - Google Patents
Three-phase inconsistency protection circuit of circuit breaker Download PDFInfo
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- CN103928916A CN103928916A CN201410145626.1A CN201410145626A CN103928916A CN 103928916 A CN103928916 A CN 103928916A CN 201410145626 A CN201410145626 A CN 201410145626A CN 103928916 A CN103928916 A CN 103928916A
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Abstract
A three-phase inconsistency protection circuit of a circuit breaker comprises a starting circuit, an outlet circuit, a tripping circuit and a power supply used for supplying power to all the circuits, wherein the starting circuit is connected between a positive electrode and a negative electrode of the power supply and comprises a switch-off normally-closed contact set, a switch-on normally-open contact set and a time relay which are all connected in series in sequence, three phases of switch-off normally-closed contacts are connected in parallel to form the switch-off normally-closed contact set, and three phases of switch-on normally-open contacts are connected in parallel to form the switch-on normally-open contact set. The three-phase inconsistency protection circuit of the circuit breaker is characterized in that the outlet circuit comprises outlet relays in series connection, and a normally-open contact of the time relay, the input end of the outlet circuit is connected to the starting circuit on the output side of the switch-off normally-closed contact set, the output end of the outlet circuit is connected with the negative electrode of the power supply, the tripping circuit is provided with normally-open contacts of the outlet relays and an operating mechanism of the circuit breaker, the input end of the tripping circuit is connected to the starting circuit on the output side of the switch-off normally-closed contact set, and the output end of the trigging circuit is connected with the negative electrode of the power supply. With the three-phase inconsistency protection circuit of the circuit breaker, breakover of the tripping circuit and abnormal tripping of the circuit breaker which are caused by error operation on the time relay can be avoided, and thus normal work of the circuit breaker is not influenced.
Description
Technical field
The present invention 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 the reason such as equipment quality and operation; 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, ensures 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, controls its break-make by time relay K7; 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: in the time of 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 exit relay Q7 misoperation, also can cause the improper tripping operation of circuit breaker when circuit breaker three is consistent, affect the normal work of circuit breaker.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of result simple, safe and reliable circuit breaker non-whole phase protection circuit.
Object of the present invention 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 present invention 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 in the time of at least one phase separating brake normally-closed contact closure (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, can avoid the time relay or exit relay generation misoperation by such scheme, and cause trip(ping) circuit conducting, cause the improper tripping operation of circuit breaker, affect the normal work of circuit breaker.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the circuit diagram of existing non-whole phase protection circuit.
Fig. 2 is the circuit diagram of non-whole phase protection circuit provided by the invention.
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, comprise separating brake normally-closed contact group, combined floodgate normally opened contact group and the time relay K7 of 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: in the time of a certain the improper tripping operation of circuit breaker, in the corresponding separating brake normally-closed contact closure of separating brake normally-closed contact group, the input of trip(ping) circuit 4 and outlet loop 5 connects positive source, start-up circuit 3 conductings make time relay K7 work, control the normal opened contact K7-1 closure of outlet loop 5 time relay K7, outlet loop 5 conductings make exit relay Q7 work, control exit relay Q7 normal opened contact Q7-A, Q7-B, the Q7-C closure of trip(ping) circuit 4, thereby make the tripping operation of circuit breaker three-phase.
The above, be only preferred embodiment of the present invention, therefore can not limit scope of the invention process with this, the equivalence of doing according to the present patent application the scope of the claims and description changes and modifies, and all should still remain within the scope of the patent.
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 |
|---|---|---|---|
| CN201410145626.1A CN103928916A (en) | 2014-04-11 | 2014-04-11 | Three-phase inconsistency protection circuit of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410145626.1A CN103928916A (en) | 2014-04-11 | 2014-04-11 | Three-phase inconsistency protection circuit of circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN103928916A true CN103928916A (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410145626.1A Pending CN103928916A (en) | 2014-04-11 | 2014-04-11 | Three-phase inconsistency protection circuit of circuit breaker |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406447A (en) * | 2015-11-20 | 2016-03-16 | 河南平芝高压开关有限公司 | Closing coil protection apparatus |
| CN107819325A (en) * | 2017-11-22 | 2018-03-20 | 国网新疆电力有限公司电力科学研究院 | The three phases un identical protection device of breaker fail protection can be started |
| CN112539930A (en) * | 2020-12-07 | 2021-03-23 | 中国长江电力股份有限公司 | GIS/GCB circuit breaker three-phase opening and closing state monitoring device and using method |
| CN112600175A (en) * | 2020-12-14 | 2021-04-02 | 云南电网有限责任公司曲靖供电局 | Three-phase inconsistent protection circuit of high-voltage circuit breaker body with voltage of 220kV and above |
| CN113097982A (en) * | 2021-03-23 | 2021-07-09 | 深圳供电局有限公司 | Remote control loop of air switch power supply |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683175A (en) * | 2013-12-17 | 2014-03-26 | 深圳市中江源科技有限公司 | Outdoor intelligent protection device at time of three-phase inconsistence and input method thereof |
| CN203787951U (en) * | 2014-04-11 | 2014-08-20 | 国家电网公司 | Three-phase inconsistent protective circuit of circuit breaker |
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2014
- 2014-04-11 CN CN201410145626.1A patent/CN103928916A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683175A (en) * | 2013-12-17 | 2014-03-26 | 深圳市中江源科技有限公司 | Outdoor intelligent protection device at time of three-phase inconsistence and input method thereof |
| CN203787951U (en) * | 2014-04-11 | 2014-08-20 | 国家电网公司 | Three-phase inconsistent protective circuit of circuit breaker |
Non-Patent Citations (2)
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| 罗保顺: "非全相运行保护在发电厂中的运用", 《浙江电力》 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406447A (en) * | 2015-11-20 | 2016-03-16 | 河南平芝高压开关有限公司 | Closing coil protection apparatus |
| CN107819325A (en) * | 2017-11-22 | 2018-03-20 | 国网新疆电力有限公司电力科学研究院 | The three phases un identical protection device of breaker fail protection can be started |
| CN112539930A (en) * | 2020-12-07 | 2021-03-23 | 中国长江电力股份有限公司 | GIS/GCB circuit breaker three-phase opening and closing state monitoring device and using method |
| CN112539930B (en) * | 2020-12-07 | 2022-04-19 | 中国长江电力股份有限公司 | GIS/GCB circuit breaker three-phase opening and closing state monitoring device and using method |
| CN112600175A (en) * | 2020-12-14 | 2021-04-02 | 云南电网有限责任公司曲靖供电局 | Three-phase inconsistent protection circuit of high-voltage circuit breaker body with voltage of 220kV and above |
| CN113097982A (en) * | 2021-03-23 | 2021-07-09 | 深圳供电局有限公司 | Remote control loop of air switch power supply |
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Application publication date: 20140716 |