CN104821557A - Control loop of breaker operation box - Google Patents
Control loop of breaker operation box Download PDFInfo
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- CN104821557A CN104821557A CN201510198299.0A CN201510198299A CN104821557A CN 104821557 A CN104821557 A CN 104821557A CN 201510198299 A CN201510198299 A CN 201510198299A CN 104821557 A CN104821557 A CN 104821557A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
The invention discloses a control loop of a breaker operation box and belongs to the technical field of relay protection. The control loop comprises an operation power supply, a jump monitoring circuit, a closing holding circuit, a reclosing circuit, an anti-jump circuit, a hand closing circuit, a first group trip coil circuit, a second group trip coil circuit, a power supply switching circuit, a power supply monitoring circuit, a DC power supply, a reclosing pressure blocking circuit, a closing pressure blocking circuit, a tripping pressure blocking circuit and a insufficient air pressure blocking circuit. The control loop achieves that a manual tripping signal and a protection tripping signal both pass through a tripping holding circuit of the breaker operation box, the requirement that the manual tripping signal and the protection tripping signal can be kept is satisfied, the protection tripping signal does not pass through a remote/local changeover switch in the breaker mechanism box at the same time, and the requirement that a protection quantity is not controlled by the remote/local changeover switch is satisfied.
Description
Technical field
The present invention relates to a kind of control loop of breaker operation cabinet, belong to technical field of relay protection.
Background technology
Breaker operation cabinet to realize in electric power system secondary circuit to the control appliance of primary circuit, i.e. the power equipment that uses of the control of low-voltage equipment to high-tension apparatus.Breaker operation cabinet can be monitored circuit breaker closing loop, and its breaking coil loop can accept hand trip(ping) signal and trip protection signal.
In traditional control box control loop, after hand trip(ping) signal is in parallel with trip protection signal, access circuit breaker trip loop.Therefore; two kinds of signals all can control by the diverter switch of a distant place in circuit breaker mechanism case/on the spot; but this does not meet power industry standard " thermal power plant, electric substation design of secondary wiring technical specification DL/T 5136-2012 " 5.1.14 article of provision and (continuing to use " DL/T 5136-2001 " 7.5.11 article) is described: protective number is by the control of the diverter switch of a distant place/on the spot; protective number directly accesses forceful electric power loop can improve functional reliability, can simplify again I/O amount.In order to meet this requirement, in practical operation, there are two kinds of control modes in breaker operation cabinet: the first, protective number is directly accessed circuit breaker trip loop, a distant place/diverter switch on the spot in circuit breaker mechanism case, hand trip(ping) signal accesses circuit breaker trip loop, a distant place/diverter switch on the spot in circuit breaker mechanism case after keeping loop by the tripping operation of breaker operation cabinet again; The second; hand trip(ping) signal is directly accessed circuit breaker trip loop; a distant place/diverter switch on the spot in circuit breaker mechanism case, protective number accesses circuit breaker trip loop, a distant place/diverter switch on the spot in circuit breaker mechanism case after keeping loop by the tripping operation of breaker operation cabinet again.In these two kinds of control modes; hand trip(ping) signal and protection exit the tripping operation on the case of access operation simultaneously can not keep loop; this does not meet national standard " relaying protection and automatic safety device technical regulation GB/T 14285-2006 " 4.1.16 article requirement yet: tripping operation outlet should be able to self-sustaining; until circuit breaker disconnects, self-sustaining should be realized by the operation circuit of circuit breaker.
In a word, existing breaker operation cabinet cannot realize both having met protective number by the control of the diverter switch of a distant place/on the spot, meets again hand trip(ping) signal and trip protection signal can self-sustaining requirement.
Summary of the invention
For the deficiency that prior art exists; the object of this invention is to provide a kind of control loop of breaker operation cabinet; realize hand trip(ping) signal and trip protection signal and all keep loop by the tripping operation of breaker operation cabinet; meeting hand trip(ping) signal and trip protection signal can self-sustaining requirement; simultaneously trip protection signal without a distant place in circuit breaker mechanism case/diverter switch on the spot, meet protective number by the requirement of a distant place/control of diverter switch on the spot.
The present invention adopts following technical scheme: a kind of control loop of breaker operation cabinet, it is characterized in that, comprise operating power, jump position monitoring circuit, close a floodgate keep loop, reclosure loop reform, anti-jump loop, hand close loop, first group of breaking coil loop, second group of breaking coil loop, electrical source exchange loop, power monitor circuit, DC power supply, reclosing pressure atresia loop, closing pressure locked loop, tripping operation pressure atresia road, air pressure is not enough locked loop; Described operating power comprises first group of operating power, second group of operating power, described jumping position monitoring circuit, described combined floodgate keep loop, described reclosure loop reform, described anti-jump loop, described hand conjunction loop, described first group of breaking coil loop to be all connected with described first group of operating power, and described second group of breaking coil loop is connected with described second group of operating power; Described electrical source exchange loop and described power monitor circuit are for realizing switching between first group of operating power and second group of operating power and supervision; For realizing, described jumping position monitoring circuit monitors that whether closing circuit operating state is normal, and judge circuit breaker trip position; Described reclosure loop reform is used for realizing sending reclosing instruction to circuit breaker; Described anti-jump loop is used for realization and prevents after device manually or automatically closes a floodgate, and the non-involution of operation-control switch or control switch contact, automatics contact block, and occur that protection act makes circuit breaker trip and the situation of " jump-close " repeatedly occurs; Described hand closes loop and is used for realizing sending closing by hand instruction to circuit breaker.
Preferably, jump position monitoring circuit to be composed in series by three jumping position relay TWJ1, TWJ2, TWJ3, indicator light L1; Close a floodgate keep loop by the normal opened contact of the latching relay HBJ that closes a floodgate, tripping operation latching relay TBJV normally closed contact, combined floodgate latching relay HBJ, a distant place/diverter switch, normally closed contact DL and closing coil HC are formed on the spot; Anti-jump loop is made up of the normal opened contact of the latching relay TBJV that trips, jumping position latching relay TBJ11, TBJ12, TBJ21, TBJ22, TBJV; Signal contact is closed by hand in hand conjunction loop, hand closes control relay SHKKJ, hand is jumped control relay STKKJ and is composed in series; Close a floodgate and keep being made up of the normally closed contact of three diode D2, D3, D4, closing pressure relay HTJ between loop and hand conjunction loop.
Preferably, first group of breaking coil loop comprises hand trip(ping) loop, hand trip(ping) maintenance loop, trip protection loop, trip protection maintenance loop, co-bit monitoring circuit; Signal contact is jumped by hand in hand trip(ping) loop, hand jumps relay STJ, hand closes control relay SHKKJ, hand is jumped control relay STKKJ and is composed in series; Hand trip(ping) keep loop by the normal opened contact of the latching relay TBJ11 that trips, tripping operation latching relay TBJ11, tripping operation pressure switch TYJ normally closed contact, a distant place/diverter switch, normal opened contact, jumping circle TQ are formed on the spot; Trip protection loop and trip protection keep loop to be made up of trip protection signal contact, the normally closed contact of tripping operation pressure switch TYJ, the normal opened contact of trip protection relay TBJ12, trip protection relay TBJ12, normal opened contact, jumping circle TQ; Co-bit monitoring circuit is composed in series by three co-bit relay HWJ1, HWJ2, HWJ3, indicator light L2; Hand trip(ping) signal carries out in parallel with trip protection signal after the normal open switch of circuit breaker mechanism case, then encloses TQ connect with described jumping.
Preferably, second group of breaking coil loop comprises operating power, co-bit monitoring circuit, hand trip(ping) maintenance loop, hand trip(ping) loop, trip protection maintenance loop, trip protection loop; Co-bit monitoring circuit is composed in series by three co-bit relay HWJ4, HWJ5, HWJ6, indicator light L2; Hand trip(ping) loop and hand trip(ping) keep loop by the normally closed contact of STJ relay normally open contact, tripping operation pressure switch TYJ, trip protection relay TBJ21 normal opened contact, trip protection relay TBJ21, a distant place/diverter switch, normal opened contact, jumping circle TQ are formed on the spot; Trip protection loop and trip protection keep loop to be made up of trip protection signal contact, the normally closed contact of tripping operation pressure switch TYJ, the normal opened contact of trip protection relay TBJ22, trip protection relay TBJ22, normal opened contact, jumping circle TQ; Hand trip(ping) signal is in parallel after the normal open switch of circuit breaker mechanism case with trip protection signal, then encloses TQ connect with described jumping.
The beneficial effect that the present invention reaches: (1) meets protective number and do not control by the diverter switch of a distant place in circuit breaker mechanism case/on the spot, but hand trip(ping) signal is by the Industry code requirements of a distant place in circuit breaker mechanism case/diverter switch control on the spot, improve the functional reliability of circuit breaker, I/O amount can be simplified again; (2) hand trip(ping) signal and trip protection signal all access breaker operation cabinet trip(ping) circuit; meet and keep trip signal until the national standard requirement of circuit breaker disconnection by the operation circuit of circuit breaker; reduce the generation of breaker failure fault, improve the functional reliability of circuit breaker.
Accompanying drawing explanation
Fig. 1 is one of theory structure circuit diagram of the present invention.
Fig. 2 is theory structure circuit diagram two of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
If Fig. 1 and Fig. 2 is theory structure circuit diagram of the present invention, the present invention adopts following technical scheme: a kind of control loop of breaker operation cabinet, it is characterized in that, comprise operating power, jump position monitoring circuit, close a floodgate keep loop, reclosure loop reform, anti-jump loop, hand close loop, first group of breaking coil loop, second group of breaking coil loop, electrical source exchange loop, power monitor circuit, DC power supply, reclosing pressure atresia loop, closing pressure locked loop, tripping operation pressure atresia road, air pressure is not enough locked loop; Operating power comprises first group of operating power, second group of operating power, jump position monitoring circuit, closing a floodgate keeps loop, reclosure loop reform, anti-jump loop, hand conjunction loop, first group of breaking coil loop to be all connected with first group of operating power, second group of breaking coil loop is connected with second group of operating power; Electrical source exchange loop and power monitor circuit are for realizing switching between first group of operating power and second group of operating power and supervision; Jump position monitoring circuit and monitor that whether closing circuit operating state is normal for realizing, and judge circuit breaker trip position; Reclosure loop reform is used for realizing sending reclosing instruction to circuit breaker; Anti-jump loop is used for realization and prevents after device manually or automatically closes a floodgate, and the non-involution of operation-control switch or control switch contact, automatics contact block, and occur that protection act makes circuit breaker trip and the situation of " jump-close " repeatedly occurs; Hand closes loop and is used for realizing sending closing by hand instruction to circuit breaker.
Preferably, jump position monitoring circuit to be composed in series by three jumping position relay TWJ1, TWJ2, TWJ3, indicator light L1; Close a floodgate keep loop by the normal opened contact of the latching relay HBJ that closes a floodgate, tripping operation latching relay TBJV normally closed contact, combined floodgate latching relay HBJ, a distant place/diverter switch, normally closed contact DL and closing coil HC are formed on the spot; Anti-jump loop is made up of the normal opened contact of the latching relay TBJV that trips, jumping position latching relay TBJ11, TBJ12, TBJ21, TBJ22, TBJV; Signal contact is closed by hand in hand conjunction loop, hand closes control relay SHKKJ, hand is jumped control relay STKKJ and is composed in series; Close a floodgate and keep being made up of the normally closed contact of three diode D2, D3, D4, closing pressure relay HTJ between loop and hand conjunction loop.
Preferably, first group of breaking coil loop comprises hand trip(ping) loop, hand trip(ping) maintenance loop, trip protection loop, trip protection maintenance loop, co-bit monitoring circuit; Signal contact is jumped by hand in hand trip(ping) loop, hand jumps relay STJ, hand closes control relay SHKKJ, hand is jumped control relay STKKJ and is composed in series; Hand trip(ping) keep loop by the normal opened contact of the latching relay TBJ11 that trips, tripping operation latching relay TBJ11, tripping operation pressure switch TYJ normally closed contact, a distant place/diverter switch, normal opened contact, jumping circle TQ are formed on the spot; Trip protection loop and trip protection keep loop to be made up of trip protection signal contact, the normally closed contact of tripping operation pressure switch TYJ, the normal opened contact of trip protection relay TBJ12, trip protection relay TBJ12, normal opened contact, jumping circle TQ; Co-bit monitoring circuit is composed in series by three co-bit relay HWJ1, HWJ2, HWJ3, indicator light L2; Hand trip(ping) signal carries out in parallel with trip protection signal after the normal open switch of circuit breaker mechanism case, then encloses TQ connect with described jumping.
Preferably, second group of breaking coil loop comprises operating power, co-bit monitoring circuit, hand trip(ping) maintenance loop, hand trip(ping) loop, trip protection maintenance loop, trip protection loop; Co-bit monitoring circuit is composed in series by three co-bit relay HWJ4, HWJ5, HWJ6, indicator light L2; Hand trip(ping) loop and hand trip(ping) keep loop by the normally closed contact of STJ relay normally open contact, tripping operation pressure switch TYJ, trip protection relay TBJ21 normal opened contact, trip protection relay TBJ21, a distant place/diverter switch, normal opened contact, jumping circle TQ are formed on the spot; Trip protection loop and trip protection keep loop to be made up of trip protection signal contact, the normally closed contact of tripping operation pressure switch TYJ, the normal opened contact of trip protection relay TBJ22, trip protection relay TBJ22, normal opened contact, jumping circle TQ; Hand trip(ping) signal is in parallel after the normal open switch of circuit breaker mechanism case with trip protection signal, then encloses TQ connect with described jumping.
Inventive point of the present invention is: hand trip(ping) signal accesses circuit breaker trip loop after keeping loop by the tripping operation of breaker operation cabinet again, a distant place/diverter switch on the spot in circuit breaker mechanism case, and control by the diverter switch of a distant place in circuit breaker mechanism case/on the spot; Trip protection signal accesses circuit breaker trip loop, a distant place/diverter switch on the spot in circuit breaker mechanism case after keeping loop by the tripping operation of breaker operation cabinet again, does not control by the diverter switch of a distant place in circuit breaker mechanism case/on the spot.
Operation principle of the present invention: when (1) circuit breaker is in open position, the normally closed auxiliary contact of circuit breaker closes, TWJ1, TWJ2, TWJ3 action, and send corresponding contact to protection and signal circuit, indicator light L1 is bright; If hand closes or automatic reclosing time, the HBJ actuating of relay by self contact self-sustaining, until circuit breaker closes, switch auxiliary contact disconnects, now, the SHKKJ actuating of relay magnetic keep, the involution of STKKJ relay; (2) when circuit breaker is in closing position, if hand trip(ping) signal contact triggers, the STJ actuating of relay, the involution of SHKKJ relay, the STKKJ actuating of relay magnetic keep, when the pressure signal that trips does not send, the normally closed contact of TYJ relay is failure to actuate, the now TBJ11 actuating of relay by its contact self-sustaining, even if hand trip(ping) blackout, the contact of TBJ11 relay can make hand jump signal self-sustaining, hand jump signal through a distant place/diverter switch on the spot, breaker actuation; (3) when circuit breaker is in closing position, circuit breaker is often opened auxiliary contact and is closed, HWJ1, HWJ2, HWJ3 action, and send corresponding contact to protection and signal circuit, indicator light L2 is bright; If trip protection signal contact triggers, the TBJ12 actuating of relay by its contact self-sustaining, without a distant place/and diverter switch on the spot, breaker actuation.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (4)
1. the control loop of a breaker operation cabinet, it is characterized in that, comprise operating power, jump position monitoring circuit, close a floodgate keep loop, reclosure loop reform, anti-jump loop, hand close loop, first group of breaking coil loop, second group of breaking coil loop, electrical source exchange loop, power monitor circuit, DC power supply, reclosing pressure atresia loop, closing pressure locked loop, tripping operation pressure atresia road, air pressure is not enough locked loop; Described operating power comprises first group of operating power, second group of operating power, described jumping position monitoring circuit, described combined floodgate keep loop, described reclosure loop reform, described anti-jump loop, described hand conjunction loop, described first group of breaking coil loop to be all connected with described first group of operating power, and described second group of breaking coil loop is connected with described second group of operating power; Described electrical source exchange loop and described power monitor circuit are for realizing switching between first group of operating power and second group of operating power and supervision; For realizing, described jumping position monitoring circuit monitors that whether closing circuit operating state is normal, and judge circuit breaker trip position; Described reclosure loop reform is used for realizing sending reclosing instruction to circuit breaker; Described anti-jump loop is used for realization and prevents after device manually or automatically closes a floodgate, and the non-involution of operation-control switch or control switch contact, automatics contact block, and occur that protection act makes circuit breaker trip and the situation of " jump-close " repeatedly occurs; Described hand closes loop and is used for realizing sending closing by hand instruction to circuit breaker.
2. the control loop of a kind of breaker operation cabinet according to claim 1, is characterized in that, described jumping position monitoring circuit is composed in series by three jumping position relay TWJ1, TWJ2, TWJ3, indicator light L1; Described close a floodgate keep loop by the normal opened contact of the latching relay HBJ that closes a floodgate, tripping operation latching relay TBJV normally closed contact, combined floodgate latching relay HBJ, a distant place/diverter switch, normally closed contact DL and closing coil HC are formed on the spot; Described anti-jump loop is made up of the normal opened contact of the latching relay TBJV that trips, jumping position latching relay TBJ11, TBJ12, TBJ21, TBJ22, TBJV; It is described that signal contact is closed by hand in hand conjunction loop, hand closes control relay SHKKJ, hand is jumped control relay STKKJ and is composed in series; Described combined floodgate keeps being made up of the normally closed contact of three diode D2, D3, D4, closing pressure relay HTJ between loop and described hand conjunction loop.
3. the control loop of a kind of breaker operation cabinet according to claim 1, it is characterized in that, described first group of breaking coil loop comprises hand trip(ping) loop, hand trip(ping) maintenance loop, trip protection loop, trip protection maintenance loop, co-bit monitoring circuit; Signal contact is jumped by hand in described hand trip(ping) loop, hand jumps relay STJ, hand closes control relay SHKKJ, hand is jumped control relay STKKJ and is composed in series; Described hand trip(ping) keep loop by the normal opened contact of the latching relay TBJ11 that trips, tripping operation latching relay TBJ11, tripping operation pressure switch TYJ normally closed contact, a distant place/diverter switch, normal opened contact, jumping circle TQ are formed on the spot; Described trip protection loop and trip protection keep loop to be made up of trip protection signal contact, the normally closed contact of tripping operation pressure switch TYJ, the normal opened contact of trip protection relay TBJ12, trip protection relay TBJ12, normal opened contact, jumping circle TQ; Described co-bit monitoring circuit is composed in series by three co-bit relay HWJ1, HWJ2, HWJ3, indicator light L2; Described hand trip(ping) signal carries out in parallel with described trip protection signal after the normal open switch of circuit breaker mechanism case, then encloses TQ connect with described jumping.
4. the control loop of a kind of breaker operation cabinet according to claim 1, it is characterized in that, described second group of breaking coil loop comprises operating power, co-bit monitoring circuit, hand trip(ping) maintenance loop, hand trip(ping) loop, trip protection maintenance loop, trip protection loop; Described co-bit monitoring circuit is composed in series by three co-bit relay HWJ4, HWJ5, HWJ6, indicator light L2; Described hand trip(ping) loop and hand trip(ping) keep loop by the normally closed contact of STJ relay normally open contact, tripping operation pressure switch TYJ, trip protection relay TBJ21 normal opened contact, trip protection relay TBJ21, a distant place/diverter switch, normal opened contact, jumping circle TQ are formed on the spot; Described trip protection loop and described trip protection keep loop to be made up of trip protection signal contact, the normally closed contact of tripping operation pressure switch TYJ, the normal opened contact of trip protection relay TBJ22, trip protection relay TBJ22, normal opened contact, jumping circle TQ; Described hand trip(ping) signal is in parallel after the normal open switch of circuit breaker mechanism case with described trip protection signal, then encloses TQ connect with described jumping.
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| CN201510198299.0A CN104821557B (en) | 2015-04-23 | 2015-04-23 | A kind of control loop of breaker operation cabinet |
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| CN201510198299.0A CN104821557B (en) | 2015-04-23 | 2015-04-23 | A kind of control loop of breaker operation cabinet |
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| CN104821557A true CN104821557A (en) | 2015-08-05 |
| CN104821557B CN104821557B (en) | 2017-06-16 |
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Cited By (6)
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| CN106451745A (en) * | 2016-10-18 | 2017-02-22 | 国网福建省电力有限公司 | Relay protection outlet loop automatic switching system |
| CN106849363A (en) * | 2017-03-17 | 2017-06-13 | 雅砻江流域水电开发有限公司 | The three-phase mechanical linkage circuit breaker control box that tripping operation contact shows entirely |
| CN111756024A (en) * | 2020-06-11 | 2020-10-09 | 深圳供电局有限公司 | Circuit breaker control circuit |
| CN112968521A (en) * | 2021-02-03 | 2021-06-15 | 中国能源建设集团安徽省电力设计院有限公司 | Circuit breaker control circuit of phase selection divide-shut brake |
| CN113064011A (en) * | 2021-03-25 | 2021-07-02 | 温州电力建设有限公司 | Automatic test method for protection operation loop |
| CN113472072A (en) * | 2021-06-02 | 2021-10-01 | 南方电网调峰调频发电有限公司 | Circuit breaker operation box and power system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451745A (en) * | 2016-10-18 | 2017-02-22 | 国网福建省电力有限公司 | Relay protection outlet loop automatic switching system |
| CN106451745B (en) * | 2016-10-18 | 2023-04-11 | 国网福建省电力有限公司 | Automatic switching system for relay protection outlet loop |
| CN106849363A (en) * | 2017-03-17 | 2017-06-13 | 雅砻江流域水电开发有限公司 | The three-phase mechanical linkage circuit breaker control box that tripping operation contact shows entirely |
| CN106849363B (en) * | 2017-03-17 | 2019-03-12 | 雅砻江流域水电开发有限公司 | The three-phase mechanical linkage circuit breaker control box that tripping contact is shown entirely |
| CN111756024A (en) * | 2020-06-11 | 2020-10-09 | 深圳供电局有限公司 | Circuit breaker control circuit |
| CN111756024B (en) * | 2020-06-11 | 2023-03-03 | 深圳供电局有限公司 | Circuit breaker control circuit |
| CN112968521A (en) * | 2021-02-03 | 2021-06-15 | 中国能源建设集团安徽省电力设计院有限公司 | Circuit breaker control circuit of phase selection divide-shut brake |
| CN112968521B (en) * | 2021-02-03 | 2022-08-02 | 中国能源建设集团安徽省电力设计院有限公司 | Circuit breaker control circuit of phase selection divide-shut brake |
| CN113064011A (en) * | 2021-03-25 | 2021-07-02 | 温州电力建设有限公司 | Automatic test method for protection operation loop |
| CN113064011B (en) * | 2021-03-25 | 2023-09-15 | 温州电力建设有限公司 | Automatic test method for protection operation loop |
| CN113472072A (en) * | 2021-06-02 | 2021-10-01 | 南方电网调峰调频发电有限公司 | Circuit breaker operation box and power system |
| CN113472072B (en) * | 2021-06-02 | 2023-07-21 | 南方电网调峰调频发电有限公司 | Double-working-mode breaker operation box |
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