CN113097982A - Remote control loop of air switch power supply - Google Patents
Remote control loop of air switch power supply Download PDFInfo
- Publication number
- CN113097982A CN113097982A CN202110306324.8A CN202110306324A CN113097982A CN 113097982 A CN113097982 A CN 113097982A CN 202110306324 A CN202110306324 A CN 202110306324A CN 113097982 A CN113097982 A CN 113097982A
- Authority
- CN
- China
- Prior art keywords
- air switch
- power supply
- loop
- electromagnetic relay
- remote control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 230000005284 excitation Effects 0.000 claims abstract description 14
- 238000012806 monitoring device Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000005347 demagnetization Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- 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
-
- 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
-
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a remote control loop of an air switch power supply, which is used for a relay protection secondary loop formed by connecting a loop power supply and a load loop through an air switch and comprises a measurement and control device and an electromagnetic relay with a normally open contact; the measurement and control device is connected with the excitation end of the electromagnetic relay, and the electromagnetic relay is excited when receiving a remote control closing instruction input by a user; or when receiving a remote control brake-separating instruction input by a user, the electromagnetic relay is demagnetized; the normally open contact of the electromagnetic relay is arranged on a connecting line between a loop power supply and an air switch in a relay protection secondary circuit, so that the normally open contact is closed during excitation, the air switch is communicated with the loop power supply, and the air switch realizes normal switching-on or switching-off under the condition that a load loop has a short-circuit fault, so that the load loop can be protected; or the normally open contact is disconnected when the magnetic field is lost, so that the air switch and the loop power supply are disconnected. By implementing the invention, the problem that the traditional manual operation input air switch cannot play a role of protection when a fault loop is input can be avoided, the operation frequency is reduced, and the misoperation is reduced.
Description
Technical Field
The invention relates to the technical field of relay protection, in particular to an air switch power supply remote control loop.
Background
The air switch in relay protection refers to a miniature circuit breaker for relay protection of a secondary circuit, and is often used as an operation switch of a power supply of the secondary circuit or a protection device during short-circuit fault. For example, when the air switch is used as an operation switch of the secondary circuit power supply, the power supply which normally operates is supplied or cut off; for another example, when a ground fault occurs in the secondary ac circuit or a short-circuit fault occurs in the secondary dc circuit, the loop power supply will provide a short-circuit current, and the short-circuit current is usually much larger than the protection action current fixed value of the air switch, so that once the short-circuit current flows through the air switch, the air switch will be tripped quickly to cut off the path of the loop power supply for supplying the short-circuit current, thereby playing a role of protecting the system.
The air switch remote control technology in the relay protection secondary circuit is applied less in practical construction due to less related operations of the air switch in the relay protection. With the increasing number of unmanned transformer substations, the operation process on the secondary circuit in the transformer substation is gradually complicated, so that the defects of the traditional manual operation of the air switch are increasingly prominent, such as misoperation and low efficiency. In addition, in the conventional mode of manually operating the air switch, the manual operation of the air switch is shifted upwards to prevent the protection action from jumping downwards on the connecting rod, so that the manually operated air switch cannot play a role in protecting the fault circuit when being switched in, and the previous air switch may be tripped, thereby enlarging the power loss range of the secondary system.
Therefore, there is a need for a remote control circuit for an air switch power supply, which can avoid the problem that the conventional manual operation of switching in the air switch cannot protect the fault circuit, reduce the operation frequency, and reduce the misoperation.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide the remote control loop of the air switch power supply, which can avoid the problem that the traditional manual operation is used to switch in the air switch, so that the air switch cannot play a role of protection when a fault loop is used, reduce the operation frequency and reduce the misoperation.
In order to solve the technical problem, an embodiment of the present invention provides a remote control loop for an air switch power supply, which is used for a relay protection secondary loop formed by connecting a loop power supply and a load loop through an air switch, and comprises a measurement and control device and an electromagnetic relay with a normally open contact; wherein the content of the first and second substances,
the measurement and control device is connected with an excitation end of the electromagnetic relay; the measurement and control device is used for exciting the electromagnetic relay when receiving a remote control switching-on instruction input by a user; or when a remote control brake opening instruction input by a user is received, the electromagnetic relay is demagnetized;
a normally open contact of the electromagnetic relay is arranged on a connecting line between a loop power supply and an air switch in the relay protection secondary circuit; the electromagnetic relay is used for enabling a normally open contact of the electromagnetic relay to be closed during excitation, and enabling the air switch to be communicated with the loop power supply, so that the air switch can realize normal switching-on or switching-off under the condition that the load loop has a short-circuit fault, and the load loop can be protected; or the normally open contact is disconnected when the magnetic field is lost, so that the air switch and the loop power supply are disconnected.
Wherein, still include: a normally closed contact and a state monitoring device which are laterally hung on the air switch; wherein the content of the first and second substances,
the normally closed contact of the air switch side hook is disconnected when the air switch is switched on; or is closed when the air switch is opened;
and the state monitoring device is connected with the normally closed contact of the air switch side hook and is used for monitoring the disconnection and the closing of the normally closed contact of the air switch side hook so as to realize the state detection of the opening and closing of the air switch.
Wherein, still include: a time delay relay; wherein the content of the first and second substances,
the time delay relay is positioned between the measurement and control device and the excitation end of the electromagnetic relay; the time delay relay is used for delaying the action time of excitation or demagnetization of the electromagnetic relay.
The measuring and controlling device, the state monitoring device and the time delay relay are integrated in the same equipment.
The embodiment of the invention has the following beneficial effects:
the invention enables the electromagnetic relay to be excited or demagnetized based on the remote control switching-on or switching-off instruction received by the measurement and control device, and enables the air switch to be communicated with the loop power supply when the electromagnetic relay is excited, so as to ensure that the air switch realizes normal switching-on or switching-off under the condition that the load loop has short-circuit fault, and can protect the load loop, thereby avoiding the problem that the air switch cannot play a role in protecting when the fault loop is switched on when the traditional manual operation is switched on, reducing the operation frequency and reducing the misoperation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a remote control loop of an air switching power supply according to an embodiment of the present invention;
fig. 2 is an application scenario diagram of a remote control loop of an air switching power supply according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, in the embodiment of the present invention, a remote control loop for an air switch power supply is provided, which is used for a secondary relay protection loop formed by connecting a loop power supply KM and a load loop L through an air switch QF, and includes a measurement and control device 1 and an electromagnetic relay 2 having a normally open contact; wherein the content of the first and second substances,
the measurement and control device 1 is connected with the excitation end of the electromagnetic relay 2; the measurement and control device 1 is used for exciting the electromagnetic relay 2 when receiving a remote control closing instruction input by a user; or when receiving a remote control brake-separating instruction input by a user, the electromagnetic relay 2 is demagnetized;
a normally open contact of the electromagnetic relay 2 is arranged on a connecting line between a loop power supply KM and an air switch QF in the relay protection secondary loop; the electromagnetic relay 2 is used for enabling a normally open contact of the electromagnetic relay to be closed during excitation, and communicating the air switch QF with the loop power supply KM, so that the air switch can realize normal switching-on or switching-off under the condition that the load loop L has a short-circuit fault, and can protect the load loop L; or the normally open contact KJ-1 is disconnected when the magnetic field is lost, and the air switch QF and the return power supply KM are disconnected.
It can be understood that, when the measurement and control device 1 receives a remote control closing instruction input by a user, the electromagnetic relay 2 is excited, and the loop power supply KM where the air switch QF is located sequentially passes through the closed normally open contact on the electromagnetic relay 2 and the air switch QF to enter the load loop L. Once the load circuit L has a short-circuit fault, normal switching-on or switching-off can be realized due to the fact that the air switch QF is electrified, so that switching-off can be realized by means of quick response according to the action characteristic of the air switch QF, the load circuit L is protected, the operation frequency can be reduced, and misoperation is reduced.
In an embodiment of the present invention, the air switching power supply remote control circuit further includes: a normally closed contact QF-1 and a state monitoring device 3 which are hung on the air switch QF; the normally closed contact of the air switch QF side hanger is disconnected when the air switch QF is switched on; or closed when the air switch QF is opened; the state monitoring device 3 is connected with the normally closed contact of the air switch QF side hanger and used for monitoring the opening and closing conditions of the normally closed contact of the air switch QF side hanger so as to realize state detection of the opening and closing of the air switch QF.
It can be understood that the normally closed contact hung on the air switch QF is matched with the state monitoring device 3, so that the state detection of the opening and closing state of the air switch QF can be realized, and the opening and closing state detection information of the air switch QF is further sent to all networking devices, including a master station system of a scheduling mechanism, a central monitoring background of a centralized control station, a remote operation and maintenance terminal and the like.
In an embodiment of the present invention, the air switching power supply remote control circuit further includes: a delay relay 4; the delay relay 4 is located between the measurement and control device 1 and the excitation end of the electromagnetic relay 2, and is used for delaying the action time of excitation or demagnetization of the electromagnetic relay 2. Of course, a corresponding delay relay can be arranged on the relay protection secondary circuit to perform action time delay.
In the embodiment of the invention, the remote control loop of the air switch power supply integrates the measurement and control device 1, the state monitoring device 3 and the time delay relay 4 into the same equipment.
As shown in fig. 2, an application scenario of the air switching power supply remote control circuit in the embodiment of the present invention is further described:
the measurement and control device, the state monitoring device and the delay relay are integrated in the same equipment and are collectively called as measurement and control equipment. A is a measurement and control device, HJ or TJ is a normally open contact of a time delay relay, and Test is a state monitoring device. Meanwhile, KJ is an electromagnetic relay, and KJ-1 is a normally open contact of the electromagnetic relay; QF is an air switch, and QF-1 is a normally closed contact of the side hanging of the air switch; KM + and KM-are loop power supplies; the load loop is shown in the dashed box.
After the measurement and control equipment receives the remote control closing instruction, a closing outlet contact HJ is closed, so that the electromagnetic relay KJ is excited, a normally open contact KJ-1 is closed, and loop power supplies KM + and KM-where the air switch QF is located enter a load loop (in a dotted line frame) through the normally open contact KJ-1 and the air switch QF. At this time, if a short-circuit fault occurs in the dashed line frame in fig. 2, the air switch QF can be normally switched on and off when being powered on, so that the operation can be quickly responded according to the self operation characteristics, and the air switch QF is switched off to protect the dashed line frame.
If the air switch QF is opened or closed, the normally closed contact QF-1 hung on the side can reflect the opening and closing state of the air switch QF. Therefore, when the air switch QF is in opening, the normally closed contact QF-1 of the side hanger is closed, the on-off state of the air switch QF is received by sending an instruction through a signal receiver of the Test in the measurement and control equipment, and the on-off state is sent to all networking equipment including a master station system of a dispatching mechanism, a central monitoring background of a centralized control station, a remote operation and maintenance terminal and the like through the integrated automation system. Meanwhile, on the basis of the remote control process, the time delay is set by the measurement and control equipment, so that the normally open contact HJ or TJ of the time delay relay acts in a time delay manner, the subsequent process is consistent with the remote control process, and the function of opening and closing the air switch at fixed time is completed.
The embodiment of the invention has the following beneficial effects:
the invention enables the electromagnetic relay to be excited or demagnetized based on the remote control switching-on or switching-off instruction received by the measurement and control device, and enables the air switch to be communicated with the loop power supply when the electromagnetic relay is excited, so as to ensure that the air switch realizes normal switching-on or switching-off under the condition that the load loop has short-circuit fault, and can protect the load loop, thereby avoiding the problem that the air switch cannot play a role in protecting when the fault loop is switched on when the traditional manual operation is switched on, reducing the operation frequency and reducing the misoperation.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (4)
1. A remote control loop of an air switch power supply is used for a relay protection secondary loop formed by connecting a loop power supply and a load loop through an air switch, and is characterized by comprising a measurement and control device and an electromagnetic relay with a normally open contact; wherein the content of the first and second substances,
the measurement and control device is connected with an excitation end of the electromagnetic relay; the measurement and control device is used for exciting the electromagnetic relay when receiving a remote control switching-on instruction input by a user; or when a remote control brake opening instruction input by a user is received, the electromagnetic relay is demagnetized;
a normally open contact of the electromagnetic relay is arranged on a connecting line between a loop power supply and an air switch in the relay protection secondary circuit; the electromagnetic relay is used for enabling a normally open contact of the electromagnetic relay to be closed during excitation, and enabling the air switch to be communicated with the loop power supply, so that the air switch can realize normal switching-on or switching-off under the condition that the load loop has a short-circuit fault, and the load loop can be protected; or the normally open contact is disconnected when the magnetic field is lost, so that the air switch and the loop power supply are disconnected.
2. The air switching power supply remote control circuit of claim 1, further comprising: a normally closed contact and a state monitoring device which are laterally hung on the air switch; wherein the content of the first and second substances,
the normally closed contact of the air switch side hook is disconnected when the air switch is switched on; or is closed when the air switch is opened;
and the state monitoring device is connected with the normally closed contact of the air switch side hook and is used for monitoring the disconnection and the closing of the normally closed contact of the air switch side hook so as to realize the state detection of the opening and closing of the air switch.
3. The air switching power supply remote control circuit according to claim 2, further comprising: a time delay relay; wherein the content of the first and second substances,
the time delay relay is positioned between the measurement and control device and the excitation end of the electromagnetic relay; the time delay relay is used for delaying the action time of excitation or demagnetization of the electromagnetic relay.
4. The air switching power supply remote control circuit of claim 3 wherein said measurement and control means, said condition monitoring means and said time delay relay are integrated in the same device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110306324.8A CN113097982A (en) | 2021-03-23 | 2021-03-23 | Remote control loop of air switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110306324.8A CN113097982A (en) | 2021-03-23 | 2021-03-23 | Remote control loop of air switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113097982A true CN113097982A (en) | 2021-07-09 |
Family
ID=76668880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110306324.8A Pending CN113097982A (en) | 2021-03-23 | 2021-03-23 | Remote control loop of air switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113097982A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115273361A (en) * | 2022-07-26 | 2022-11-01 | 中国南方电网有限责任公司超高压输电公司昆明局 | Misoperation monitoring method and device of air switch and computer equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04200246A (en) * | 1990-11-28 | 1992-07-21 | Toshiba Corp | Noninterruptible changeover device for electric railway feeder system |
| CN102540918A (en) * | 2010-12-27 | 2012-07-04 | 李超 | Lightning protection device for remotely controlling main switch through telephone response to protect household appliances |
| CN102938582A (en) * | 2012-11-20 | 2013-02-20 | 辽宁省电力有限公司鞍山供电公司 | 10kV pole-mounted circuit breaker with telemetry remote control function |
| CN103928916A (en) * | 2014-04-11 | 2014-07-16 | 国家电网公司 | Three-phase inconsistency protection circuit of circuit breaker |
| CN203839269U (en) * | 2014-03-04 | 2014-09-17 | 国家电网公司 | An improved 10kv circuit breaker closing loop |
| CN209659004U (en) * | 2018-07-05 | 2019-11-19 | 张海斌 | A kind of long-range control cabinet of intelligent network |
| CN211296174U (en) * | 2020-03-05 | 2020-08-18 | 广州拓益电气有限公司 | SF6 looped netowrk cabinet atmospheric pressure anomaly automatic tripping control circuit |
-
2021
- 2021-03-23 CN CN202110306324.8A patent/CN113097982A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04200246A (en) * | 1990-11-28 | 1992-07-21 | Toshiba Corp | Noninterruptible changeover device for electric railway feeder system |
| CN102540918A (en) * | 2010-12-27 | 2012-07-04 | 李超 | Lightning protection device for remotely controlling main switch through telephone response to protect household appliances |
| CN102938582A (en) * | 2012-11-20 | 2013-02-20 | 辽宁省电力有限公司鞍山供电公司 | 10kV pole-mounted circuit breaker with telemetry remote control function |
| CN203839269U (en) * | 2014-03-04 | 2014-09-17 | 国家电网公司 | An improved 10kv circuit breaker closing loop |
| CN103928916A (en) * | 2014-04-11 | 2014-07-16 | 国家电网公司 | Three-phase inconsistency protection circuit of circuit breaker |
| CN209659004U (en) * | 2018-07-05 | 2019-11-19 | 张海斌 | A kind of long-range control cabinet of intelligent network |
| CN211296174U (en) * | 2020-03-05 | 2020-08-18 | 广州拓益电气有限公司 | SF6 looped netowrk cabinet atmospheric pressure anomaly automatic tripping control circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115273361A (en) * | 2022-07-26 | 2022-11-01 | 中国南方电网有限责任公司超高压输电公司昆明局 | Misoperation monitoring method and device of air switch and computer equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113097982A (en) | Remote control loop of air switch power supply | |
| CN110988665B (en) | Abnormal alarm method for closing function of spring type circuit breaker | |
| CN209216904U (en) | DW15 Series Air Circuit Breaker automatic closing control circuit | |
| CN203205987U (en) | Device for remote control operation of circuit breaker for power supply of motor with isolating switch | |
| CN201146370Y (en) | Apparatus for reducing excitation inrush current of rectifier transformer | |
| CN103943396A (en) | Circuit breaker operation loop | |
| WO2021093430A1 (en) | Contactor control device and power supply system | |
| CN102779612A (en) | Pre-magnetizing device for main power supply transformer of electric power circuit | |
| CN203774211U (en) | Automatic closing control circuit of universal circuit breaker | |
| CN110853863A (en) | Anti-burning self-protection opening and closing electromagnet device and control method thereof | |
| CN202231403U (en) | Closing protection device of permanent magnetism operating mechanism | |
| JP2011076986A (en) | Circuit breaker operation monitoring device, monitoring system, program, and judgement method of input operation method of circuit breaker | |
| CN104835692B (en) | Circuit breaker operation mechanism control device and its control box | |
| CN211579581U (en) | Power-off protection system for motor of compressor of refrigerating unit | |
| CN203811773U (en) | HD4 breaker switch bridging circuit | |
| CN109921325B (en) | Switch cabinet closing locking loop | |
| CN215733650U (en) | Remote voltage-loss local tripping control circuit | |
| CN113809826A (en) | Transformer substation switching control system and method | |
| CN202711902U (en) | Pre-magnetizing device for power supply main transformer of power line | |
| CN110931311A (en) | VSP5 switch electric control circuit | |
| CN101944711A (en) | Distribution box | |
| CN201616406U (en) | Miniature leakage alarming and non-operating circuit breaker | |
| CN217468244U (en) | Automatic double-delay opening and closing control circuit of low-voltage frame circuit breaker | |
| CN204407860U (en) | The control circuit of circuit breaker Undertension shunt opening integrated electrical apparatus release | |
| CN217469542U (en) | Double-criterion power supply switching system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210709 |
|
| RJ01 | Rejection of invention patent application after publication |