CN110137009B - Anti-misoperation device for preventing manual operation of isolating switch in operation - Google Patents
Anti-misoperation device for preventing manual operation of isolating switch in operation Download PDFInfo
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- CN110137009B CN110137009B CN201910353193.1A CN201910353193A CN110137009B CN 110137009 B CN110137009 B CN 110137009B CN 201910353193 A CN201910353193 A CN 201910353193A CN 110137009 B CN110137009 B CN 110137009B
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- unlocking
- prevention
- lock
- contact
- misoperation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
- H01H2009/265—Interlocking, locking, or latching mechanisms for interlocking two or more switches with interlocking of more than two switches
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- Electromagnetism (AREA)
- Lock And Its Accessories (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
The invention discloses an anti-misoperation device for preventing forced manual operation of an isolating switch in operation, which comprises an isolating switch operating mechanism box, wherein an anti-misoperation control box and a control circuit are integrated in the isolating switch operating mechanism box, and the anti-misoperation control box comprises an electric coding lock, a direct current electromagnetic lock, a door collision travel switch and a plurality of unlocking relays; the control circuit comprises a short-circuit prevention locking and state removing loop and a five-prevention unlocking and electromagnetic lock loop, the two loops are connected in parallel, the electric coding lock is connected in the short-circuit prevention locking and state removing loop in series, and the direct-current electromagnetic lock is connected into the five-prevention unlocking and electromagnetic lock loop and controls the anti-misoperation device to open and close the door lock. The invention can effectively prevent the isolating switch from being forcibly operated manually, thoroughly solves the defects of a five-prevention system, effectively prevents misoperation accidents and ensures personal and equipment safety.
Description
Technical Field
The invention relates to the field of power grids, in particular to an anti-misoperation device for preventing manual operation during operation of an isolating switch.
Background
In the prior art, large-area power failure, equipment damage, personal injury and the like can be caused by electrical misoperation in a power system. The five-prevention factory designs various five-prevention systems to effectively control the occurrence of misoperation accidents, wherein the most used disconnecting switch is an electrical coding identification unlocking technology, and misoperation prevention control is performed on an electrical operation loop, so that the five-prevention system is widely applied. At present, in the aspect of preventing manual operation of the disconnecting switch with the electric operating mechanism, effective error prevention measures are not taken, a person on duty can forcibly use an operating handle of the disconnecting switch electric operating mechanism to randomly separate and combine the disconnecting switch electric operating handle, the disconnecting switch electric operating handle does not have the function of error prevention locking, misoperation accidents can occur, and the safety of the person and equipment is directly endangered.
Disclosure of Invention
The invention aims to provide an anti-misoperation device for preventing the isolating switch from being forcibly operated manually in operation, which can effectively prevent the isolating switch from being forcibly operated manually in operation, thoroughly solve the defects of a five-prevention system, effectively prevent misoperation accidents and ensure the safety of human bodies and equipment.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a prevent isolator manual operation's mistake device of preventing in service forcing, includes the isolator operating device case to at isolator operating device incasement integration have prevent mistake control box and control circuit, its characterized in that: the anti-misoperation control box comprises an electric coding lock, a direct current electromagnetic lock, a door-touch travel switch and a plurality of unlocking relays; the control circuit comprises a short-circuit prevention locking and state removing loop and a five-prevention unlocking and electromagnetic lock loop, the two loops are connected in parallel, the electric coding lock is connected in the short-circuit prevention locking and state removing loop in series, and the direct-current electromagnetic lock is connected into the five-prevention unlocking and electromagnetic lock loop and controls the anti-misoperation device to open and close the door lock.
Furthermore, the electric coded lock is a five-prevention electric coded lock for preventing the front side and the back side from short circuit operation, and comprises a rotating electrode and a fixed electrode which are arranged in a short circuit prevention box, a wiring terminal and a computer key matched with a lock body; the wiring terminal is provided with a plurality of mutually disconnected contacts through a plurality of copper wires in an extending mode, an insulation stroke push rod is connected among the contacts, and one end of the insulation stroke push rod is connected to the rotary electrode.
Furthermore, the contacts at least comprise three contacts which are respectively set as a normally open contact, a common contact and a normally closed contact, the common contact is arranged between the normally open contact and the normally closed contact, and each contact is respectively arranged on one copper wire.
The multiple contacts are separately arranged, the multiple auxiliary contacts are hermetically installed in the short-circuit prevention box for management, and the two electrodes are not directly connected into a circuit breaker or an isolating switch operation loop, so that direct operation of the five electric-proof coded locks for preventing positive and negative short circuits is realized.
Furthermore, one end of the rotating electrode is connected with a rotating shifting piece, the rotating shifting piece abuts against the end portion of the insulation stroke push rod, a plurality of copper conductor shifting pieces are arranged on the insulation stroke push rod, and the copper conductor shifting pieces are arranged above or below the copper conductors respectively.
The rotary poking piece drives the insulation stroke rod to move upwards or downwards in the rotating process of the electrode rod, and meanwhile, the copper wire poking piece pokes the copper wire to move upwards or downwards and controls the contact or separation of the contacts.
Further, the anti-misoperation control box is installed on the support frame, and an operating handle jack is arranged on the support frame.
Furthermore, the unlocking relay comprises a short-circuit prevention locking relay, a five-prevention unlocking relay and an electromagnetic lock unlocking time-limiting relay, and the short-circuit prevention locking relay is connected in series into a short-circuit prevention locking and state releasing loop.
Furthermore, the five-prevention unlocking relay and the electromagnetic lock unlocking time-limiting relay are connected in parallel with the direct current electromagnetic lock and then connected in series to the electric locking contact.
Further, the control circuit further comprises an emergency unlocking control circuit, the emergency unlocking control circuit comprises a normally closed contact and a normally open contact which are connected to the direct-current control power supply, and an unlocking button for controlling the normally closed contact and the normally open contact to switch, and the normally open contact is connected to the direct-current electromagnetic lock.
The invention has the beneficial effects that: the electric coded lock is different from the prior art, the short-circuit prevention locking loop is installed on the electric coded lock, once an illegal person short-circuits the electric coded lock, the electromagnetic unlocking loop is permanently locked, the electric coded lock is matched with a computer key for use, a mechanical lock chip is placed in the electric coded lock, a five-prevention system is recorded, the unlocking logic of the electric coded lock is written into a logic formula of interval equipment, and the circuit breaker and the grounding disconnecting link auxiliary contact are connected in series in the five-prevention unlocking and electromagnetic unlocking loop to realize five-prevention logic electromagnetic unlocking; the circuit breaker and the grounding disconnecting link auxiliary contact are connected in series in the five-prevention unlocking and electromagnetic lock loop, so that the disconnecting switch with the grounding switch can be effectively prevented from being pulled and closed under the condition of manual load and unreliable mechanical locking of the grounding disconnecting link.
Drawings
FIG. 1 is a schematic structural diagram of an anti-misoperation device for preventing the isolating switch from being forcibly manually operated in operation, provided by the invention;
FIG. 2 is a schematic circuit diagram of the anti-misoperation device for preventing the isolating switch from being forced to operate manually according to the invention;
FIG. 3 is a schematic view of an electric coded lock of the anti-misoperation device for preventing the isolating switch from being forced to operate manually according to the present invention;
FIG. 4 is a schematic diagram of the remote uploading of illegal unlocking information of the anti-misoperation device for preventing the isolating switch from being forced to operate manually according to the invention
Fig. 5 is a schematic diagram of a voice horn principle of the anti-misoperation device for preventing the isolating switch from being forcibly manually operated in the operation process.
Reference numerals:
1-electric coded lock, 2-direct current electromagnetic lock, 3-door bump travel switch SQ2, 4-door lock, 5-door handle, 6-operating handle jack, 7-fixing screw, 8-door pin, 9-support frame, 10-valve screw, 11-direct current control power supply, 12-direct current control power supply air switch, 13-emergency unlocking button, 14-short-circuit prevention locking relay KM1, 15-five-prevention unlocking relay KM2, 16-electromagnetic lock unlocking time limit relay SJ1, 17-breaker auxiliary contact DL1, 18-grounding knife switch auxiliary contact GD1, 19-voice horn, 20-anti-error control box, 21-isolating switch electric operation loop, 34-electric coded lock body, 35-normally open contact, 36-common contact, 37-normally closed contact, 38-spring piece, 39-rotary electrode, 40-rotary plectrum, 41-insulation stroke push rod and 42-fixed electrode.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1-4, an anti-misoperation device for preventing the isolating switch from being manually operated during operation comprises an isolating switch operating mechanism box, and an anti-misoperation control box 20 and a control circuit are integrated in the isolating switch operating mechanism box, and is characterized in that: the anti-misoperation control box comprises an electric coding lock 1, a direct current electromagnetic lock 2, a door collision travel switch 3 and a plurality of unlocking relays; the control circuit comprises a short-circuit prevention locking and state removing loop and a five-prevention unlocking and electromagnetic lock loop, the two loops are connected in parallel, the electric coding lock 1 is connected in the short-circuit prevention locking and state removing loop in series, and the direct-current electromagnetic lock 2 is connected into the five-prevention unlocking and electromagnetic lock loop and controls the anti-misoperation device door lock 4 to be opened and closed, so that the anti-misoperation device door lock is manually opened by an administrator and used in an emergency.
The anti-misoperation control box 20 is installed on the support frame 9, and an operating handle jack 6 is arranged on the support frame 9.
The unlocking relay comprises a short-circuit prevention locking relay, a five-prevention unlocking relay and an electromagnetic lock unlocking time-limiting relay, and the short-circuit prevention locking relay is connected in series into a short-circuit prevention locking and state removing loop. And the five-prevention unlocking relay and the electromagnetic lock unlocking time-limiting relay are connected in parallel with the direct current electromagnetic lock 2 and then connected in series to the electric locking contact. The control circuit further comprises an emergency unlocking control circuit, the emergency unlocking control circuit comprises a normally closed contact and a normally open contact which are connected to the direct current control power supply 11, and an unlocking button for controlling the normally closed contact and the normally open contact to switch, and the normally open contact is connected to the direct current electromagnetic lock 2.
The electric coded lock 1 is a five-prevention electric coded lock for preventing the front side and the back side from short circuit operation, and comprises a rotating electrode 39 and a fixed electrode 42 which are arranged in a short circuit prevention box, a connecting terminal and a computer key matched with a lock body; the wiring terminal is provided with a plurality of mutually disconnected contacts through a plurality of copper wires in an extending manner, an insulation stroke push rod 41 is connected among the contacts, and one end of the insulation stroke push rod 41 is connected to the rotating electrode 39.
The rotating electrode 39 is fixedly supported by a rotatable electrode 39 seat and a bearing and is arranged in the electric coding lock body 34, can flexibly rotate for 360 degrees and has electric conductivity, and the rotating angle of the rotatable plectrum 40 can be arbitrarily adjusted and installed at the tail end of the rotatable electrode 39 according to the angle requirement and is fixed by a fixing nut. When the computer key is inserted into the electric code lock body 34 and presses an unlocking button, the unlocking operating rod rotates 90 degrees clockwise, and simultaneously the rotatable plectrum 40 also rotates 90 degrees to stir the insulation stroke push rod 41 to move upwards, so that the common contact 36 is opened to the normally closed contact 37 and is closed to the normally open contact 35 to achieve the purpose of unlocking control of an electric circuit. The fixed electrode 42 is fixedly supported by the fixed electrode 42 seat and is arranged inside the electric code lock body 34, and the fixed electrode is non-rotatable and conductive and is used for reliably positioning, guiding and fixedly supporting a fixed bolt of a computer key. When the computer key unlocking button is released, the unlocking operating rod drives the rotatable shifting piece 40 to rotate 90 degrees anticlockwise, and the auxiliary contact and the insulation stroke push rod 41 automatically return to the initial state under the action of the spring piece 38.
The contacts at least comprise three contacts which are respectively set as a normally open contact 35, a common contact 36 and a normally closed contact 37, the common contact 36 is arranged between the normally open contact 35 and the normally closed contact 37, and each contact is respectively arranged on one copper wire. One end of the rotatable electrode 39 rod is connected with a rotating shifting piece 40, the rotating shifting piece 40 abuts against the end part of an insulation stroke push rod 41, a plurality of copper conductor shifting pieces are arranged on the insulation stroke push rod 41, and the copper conductor shifting pieces are respectively arranged above or below the copper conductors.
Specifically, the contacts are preferably three, and are respectively provided as a normally open contact 35, a common contact 36, and a normally closed contact 37, the common contact 36 is provided between the normally open contact 35 and the normally closed contact 37, and each contact is provided on one copper wire. At this time, the copper wire paddles are disposed below the normally open contact 35, above the normally closed contact 37 and the common contact 36, respectively. The rotary paddle 40 drives the insulation stroke rod to move up or down during the rotation of the electrode rod, while the copper wire paddle pulls the copper wire up or down and controls the contact or separation between the plurality of contacts. In the process, when the insulation stroke rod moves upwards, the copper wire shifting piece of the common contact 36 is driven to move upwards until the copper wire of the normally closed contact 37 is abutted, and the copper wire is moved upwards, the normally closed contact 37 and the common contact 36 can not be contacted in the process, and the normally open contact 35 moves upwards to be in series contact with the common contact 36. Conversely, when the insulating stroke rod moves down, the normally closed contact 37 is driven to be connected with the common contact 36 in series. The multiconductor sets up separately, and closes a plurality of auxiliary contacts and installs and manage in preventing the short circuit box.
When the anti-misoperation isolation switch is used specifically, as shown in fig. 1 and 2, the electric coded lock 1, the direct current electromagnetic lock 2, the door bump travel switch SQ2(3), the short-circuit prevention locking relay KM1(14), the five-prevention unlocking relay KM2(15), the electromagnetic lock unlocking time-limiting relay SJ1(16) and the intelligent voice horn 19 are all arranged in the anti-misoperation control box 20, the anti-misoperation control box 20 is installed on the supporting frame 9 and is fixed by the fixing screw 7, and then the breaker auxiliary contact DL1(17) and the grounding knife switch auxiliary contact GD1(18) are respectively connected in series into a five-prevention unlocking and electromagnetic lock loop, so that the anti-forced manual operation isolation switch or the loaded and ground knife forced manual pulling and closing isolation switch is realized. The door collision travel switches SQ2-1(3) are serially connected into the isolating switch electric operation loop 21 to realize mutual locking of electric operation and manual operation.
After an operator issues a bill through the electromagnetic unlocking logic of the five-prevention system, the computer key is transmitted through the operation logic, the computer key is inserted into the electric coded lock 1 during operation, the mechanical lock code of the electric coded lock 1 is identified through the computer key, the computer key unlocking button is pressed, the normally closed contact SQ1-1 breaks the short circuit prevention locking and state releasing loop, the normally open contact SQ1-2 is closed and is connected with the five-prevention unlocking and electromagnetic lock loop, the excitation action of the five-prevention unlocking relay KM2(15) is realized, the normally open contact KM2-1 is closed and is self-held, the excitation action of the direct current electromagnetic lock 2 automatically opens the door of the anti-error control box 20, and the operator can insert the isolating switch operating handle into the operating handle jack 6 to perform manual opening and closing operations. Meanwhile, the electromagnetic unlocking timing of the excitation action of the electromagnetic lock unlocking time-limiting relay SJ1(16) can be set to be 180 seconds, when the electromagnetic lock unlocking time-limiting relay SJ1(16) is not operated for a long time after unlocking, and the timing time reaches 180 seconds, the delay disconnection contact SJ1-1 automatically disconnects the five-prevention unlocking and electromagnetic lock loop, the five-prevention unlocking relay KM2(15) loses the magnetism and returns, the self-holding contact KM2-1 disconnects, the direct current electromagnetic lock 2 loses the magnetism and returns to automatically lock the anti-misoperation control box 20 to prevent the electromagnetic unlocking state from being processed for a long time, and the electromagnetic lock unlocking time-limiting relay SJ1(16) loses the magnetism and.
When the door of the anti-misoperation control box 20 is opened, the normally open contact SQ2-1 thereof opens the isolating switch electrical operation loop 21 to lock the electrical operation loop, the normally closed contact SQ2-2 is closed to connect the intelligent voice prompt loop, and the intelligent voice horn 19 sends out' operation end, please close the door! "with suggestion operating personnel in time close prevent mistake control box 20 door, if operating personnel forget will prevent mistake control box 20 door and close when good, voice prompt will send for a long time, and normally open contact SQ 2-1's disconnection isolator electrical operation return circuit 21, operating personnel can't carry out electrical operation when next operation, only will prevent mistake device control box door and close, its contact SQ2-1 returns and just allows electrical operation, the effectual control operating personnel of above measures closes in time and prevents mistake device control box door after the operation finishes, so that five prevent logical unlocking operations next time.
When an illegal person short-circuits the conductor due to the fact that the left pole and the right pole of the electric coded lock 1, the short-circuit prevention locking relay KM1(14) of the short-circuit prevention locking loop is triggered instantly and performs excitation action, the normally open contact KM1-1 is self-maintained, the normally closed contact KM1-2 breaks the five-prevention unlocking and electromagnetic lock loop, the direct current electromagnetic lock 2 is permanently locked, manual operation of the isolating switch is forbidden, and a manager can unlock the electric coded lock 1 by lightly pressing the emergency unlocking button 13 through opening the door lock 4 or using a correct five-prevention unlocking program. Meanwhile, the normally open contact KM1-3 is connected to the intelligent voice prompt loop and the intelligent voice loudspeaker sends out' illegal operation, the operation is forbidden! | A The operator is warned of illegal unlocking on site, the quantity of hard contact points closed by the normally open contact KM1-4 is sent to the public measurement and control device, and a preset message 'some isolating switch is forced to operate manually'! And informing the on-duty dispatcher to effectively manage and control illegal unlocking operators in advance.
Under the condition of any component fault or emergency in the anti-misoperation device, the direct-current control power supply 11 can be isolated without influencing the operation by disconnecting the 1DK, and the door opening operation of the key can be managed by using the anti-misoperation control box 20 and the door lock 4 under the supervision of a manager. If the isolating switch is in interval maintenance work, after the anti-misoperation control box 20 door is opened by the method, the emergency unlocking button SA1(13) is lightly pressed, the normally closed contact SA1-1 of the emergency unlocking button is disconnected to prevent short-circuit locking, state release, five-prevention unlocking and electromagnetic unlocking time limit loop, the normally open contact SA1-2 is closed to directly switch on the excitation action of the electromagnetic lock loop direct current electromagnetic lock 2, the anti-misoperation control box 20 door can keep the open state for a long time, the door touch travel switch SQ2(3) is disconnected from the normally open contact SQ2-1, the reliable locking isolating switch electrical operation loop 21 only allows manual operation, the intelligent voice is switched on to prompt the loop to send out' operation end, please close the door! "in order to indicate operating personnel or maintainer in time to close the door after the work is finished, the maintainer of being convenient for is to a series of maintenance debugging work of isolator under this state.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a prevent isolator manual operation's mistake device of preventing in service forcing, includes the isolator operating device case to at isolator operating device incasement integration have prevent mistake control box and control circuit, its characterized in that: the anti-misoperation control box comprises an electric coding lock, a direct current electromagnetic lock, a door-touch travel switch and a plurality of unlocking relays; the control circuit comprises a short-circuit prevention locking and state removing loop and a five-prevention unlocking and electromagnetic lock loop, the two loops are connected in parallel, the electric coding lock is connected in the short-circuit prevention locking and state removing loop in series, and the direct-current electromagnetic lock is connected into the five-prevention unlocking and electromagnetic lock loop and controls the anti-misoperation device to open and close the door lock; the door stopper travel switch is connected in series into an electrical operation loop of the isolating switch so as to realize mutual locking of electrical operation and manual operation;
the electric coded lock is a five-prevention electric coded lock for preventing the front side and the back side from short circuit operation, and comprises a rotating electrode and a fixed electrode which are arranged in a short circuit prevention box, a wiring terminal and a computer key matched with a lock body; the wiring terminal is provided with a plurality of mutually disconnected contacts through a plurality of copper wires in an extending manner, an insulation stroke push rod is connected among the contacts, and one end of the insulation stroke push rod is connected to the rotary electrode;
the unlocking relay comprises a short-circuit prevention locking relay, a five-prevention unlocking relay and an electromagnetic lock unlocking time-limiting relay, and the short-circuit prevention locking relay is connected in series into a short-circuit prevention locking and state removing loop.
2. The anti-misoperation device for preventing the isolating switch from being forced to be manually operated in the running process according to claim 1, is characterized in that: the contact includes three at least, sets up to normally open contact, public contact, normally closed contact respectively, and public contact sets up between normally open contact and normally closed contact, and every contact sets up respectively on a copper wire.
3. The anti-misoperation device for preventing the isolating switch from being forced to be manually operated in the running process according to claim 1, is characterized in that: one end of the rotating electrode is connected with a rotating shifting piece which abuts against the end part of the insulation stroke push rod, a plurality of copper conductor shifting pieces are arranged on the insulation stroke push rod, and the copper conductor shifting pieces are respectively arranged above or below the copper conductors.
4. The anti-misoperation device for preventing the isolating switch from being forced to be manually operated in the running process according to claim 1, is characterized in that: the anti-misoperation control box is installed on the support frame, and an operating handle jack is arranged on the support frame.
5. The anti-misoperation device for preventing the isolating switch from being forced to be manually operated in the running process according to claim 1, is characterized in that: and the five-prevention unlocking relay and the electromagnetic lock unlocking time-limiting relay are connected in parallel with the direct current electromagnetic lock and then connected in series to the electric locking contact.
6. The anti-misoperation device for preventing the isolating switch from being forced to be manually operated in the running process according to claim 1, is characterized in that: the control circuit further comprises an emergency unlocking control circuit, the emergency unlocking control circuit comprises a normally closed contact and a normally open contact which are connected to the direct-current control power supply, and an unlocking button for controlling the normally closed contact and the normally open contact to switch, and the normally open contact is connected to the direct-current electromagnetic lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910353193.1A CN110137009B (en) | 2019-04-29 | 2019-04-29 | Anti-misoperation device for preventing manual operation of isolating switch in operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910353193.1A CN110137009B (en) | 2019-04-29 | 2019-04-29 | Anti-misoperation device for preventing manual operation of isolating switch in operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110137009A CN110137009A (en) | 2019-08-16 |
| CN110137009B true CN110137009B (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910353193.1A Active CN110137009B (en) | 2019-04-29 | 2019-04-29 | Anti-misoperation device for preventing manual operation of isolating switch in operation |
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| CN (1) | CN110137009B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009064737A (en) * | 2007-09-10 | 2009-03-26 | Fuji Electric Fa Components & Systems Co Ltd | Interlock device for reversible electromagnetic contactor |
| CN101692534B (en) * | 2009-06-24 | 2013-06-12 | 微山县供电公司 | Blocking against misoperation, alarming and protecting device of high-voltage switch cabinet |
| CN202997704U (en) * | 2012-12-19 | 2013-06-12 | 珠海优特电力科技股份有限公司 | Distribution network terminal having anti-misoperation function |
| CN104538219A (en) * | 2014-12-04 | 2015-04-22 | 国家电网公司 | Wireless intelligent omni-sealed five-prevention electric lock |
| CN210091944U (en) * | 2019-04-29 | 2020-02-18 | 贵州电网有限责任公司 | Anti-misoperation device for preventing manual operation of isolating switch in operation |
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