CN206790101U - A kind of ring network power supply anti-misoperation system - Google Patents
A kind of ring network power supply anti-misoperation system Download PDFInfo
- Publication number
- CN206790101U CN206790101U CN201720536328.4U CN201720536328U CN206790101U CN 206790101 U CN206790101 U CN 206790101U CN 201720536328 U CN201720536328 U CN 201720536328U CN 206790101 U CN206790101 U CN 206790101U
- Authority
- CN
- China
- Prior art keywords
- power supply
- electric
- ring network
- electrical verification
- ring
- 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.)
- Active
Links
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
It the utility model is related to electric power electric technical field, more particularly to a kind of ring network power supply anti-misoperation system.The ring network power supply anti-misoperation system includes state detection circuit, authorizes interface, electronics electrical verification key, solution lock interface, electric locking terminal；Installment state detects circuit on the earthed switch of subordinate's ring-main unit cabinet incoming line cabinet, and electronics electrical verification key is with authorizing Interference fit, when insertion authorizes interface to obtain earthed switch folding condition information；Electric locking terminal is connected with the on-load switch of higher level's ring-main unit cabinet incoming line cabinet, after the unlocking signal of electronics electrical verification key is obtained, just opens on-load switch, carries out power transmission；So by ring network power supply anti-misoperation system of the present utility model, solve the problems, such as that different ring main unit power transmission earthed switches do not have separating brake, avoid maloperation of multiple ring main units in looped network transmission process；Installation process is convenient and swift without having a power failure；The effective guarantee personal safety of operating personnel and the safe operation of equipment.
Description
Technical field
It the utility model is related to electric power electric technical field, more particularly to a kind of ring network power supply anti-misoperation system.
Background technology
At present, ring main unit mainly includes one or one by the component units cabinet such as incoming line cabinet and outgoing line cabinet, every group of unit cabinet
Above incoming line cabinet, multiple unit cabinets form ring network power supply system, structural representation such as Fig. 1 institutes of ring network power supply by the connection of its incoming line cabinet
Show.Wherein, A units are higher level's ring-main unit cabinet, including cabinet 1, cabinet 2, cabinet 3 and cabinet 4, and wherein cabinet 2 is the incoming line cabinet of A units；B is mono-
Member is subordinate's ring-main unit cabinet, including cabinet 1, cabinet 2, cabinet 3 and cabinet 4, and wherein cabinet 1 is unit B incoming line cabinet；Subordinate's ring-main unit cabinet enters
The earthed switch of line cabinet is G1-1, and the on-load switch (or being breaker) of higher level's ring-main unit cabinet incoming line cabinet is K2.
The operating mechanism departure of ring-main unit cabinet is moved and manual+electronic two kinds of modes, usually, at on-load switch handle hole
Blocking device is installed, on-load switch can also be controlled by electric operating.On-load switch or open circuit in this unit interval of ring main unit
There is mechanical interlocked control between device and earthing, can realize that forced blocking is realized in following two kind five anti-requirement：
1st, on-load switch or breaker when knife closes a floodgate can be grounded and be unable to power transmission combined floodgate；
2nd, it can realize that earthed switch can not close a floodgate when on-load switch or breaker closing.
By forced blocking, the short circuit grounding failure of power transmission maloperation can be effectively prevented.
In ring main unit operation, according to the signal map analysis to more than, when K2 (on-load switch) power transmission of A units, B is mono-
1 spacing ground switch G1-1 of member must be gate-dividing state, otherwise will result in ground connection and short trouble.
But in the prior art, different units cabinet is not present due to being that independent unit cabinet is set between different units cabinet
The control of mechanical interlocking, powered the problem of missing splice grafting earthing knife-switch, the i.e. non-separating brake of subordinate's earthing are easily caused in operating process, on
The problem of level misdelivery is electric.
Utility model content
(1) technical problems to be solved
The technical problems to be solved in the utility model is to provide a kind of ring network power supply anti-misoperation system, to solve multiple rings
Net cabinet easy maloperation, the personal safety to operating personnel and safe operation of equipment in ring network power supply easily cause asking for prestige evil
Topic.
(2) technical scheme
In order to solve the above technical problems, ring network power supply anti-misoperation system provided by the utility model, including state-detection
Circuit, authorize interface, electronics electrical verification key, solution lock interface, electric locking terminal；The state detection circuit is arranged on subordinate's ring
On the earthed switch of net unit cabinet incoming line cabinet, to detect the folding condition of the earthed switch；The mandate interface and the shape
State detection circuit connection, the electronics electrical verification key and the mandate Interference fit, it is described to obtain when insertion authorizes interface
Earthed switch folding condition information；The electric locking terminal is connected with the on-load switch of higher level's ring-main unit cabinet incoming line cabinet, with
Control the folding of the on-load switch；It is described solution lock interface be connected with the electric locking terminal, the electronics electrical verification key and
The unblock Interference fit, when insertion solves lock interface to input the folding shape of the earthed switch to the electric locking terminal
State information.
Wherein, the state detection circuit is connected with the auxiliary contact of the earthed switch.
Wherein, the electronics electrical verification key include memory module and be sequentially connected power module, key controller module and
Electrical verification joint, electrical verification joint are engaged with the mandate interface；The memory module is connected with the key controller module, to deposit
Store up the folding condition information of earthed switch.
Wherein, the electronics electrical verification key also includes display module and alarm modules, the display module and the key
Control module connects, to show the folding condition information of earthed switch；The alarm modules are connected with the key controller module,
Electrical verification joint insert solution latching connector and on-load switch be not turned on when send a warning.
Wherein, the electric locking terminal is electric padlock locking terminal, and the solution lock interface is located at electric padlock locking
In terminal；The electric padlock locking terminal is arranged on the handle hole of the on-load switch.
Wherein, the electric locking terminal is anti-error electric operating control circuit, the anti-error electric operating control circuit
It is arranged on the main inlet wire of motor-operating mechanism, the anti-error electric operating control circuit is connected with the solution lock interface.
Wherein, the anti-error electric operating control circuit includes the first relay, the second relay, the first node and second
Node；First node is connected with the motor-operating mechanism, and the power input of the second node and the motor-operating mechanism connects
Connect；First relay is connected between the first node and the second node, and the second relay is connected to the first node and second
Between node.
Wherein, higher level's ring-main unit cabinet incoming line cabinet is connected between the anti-error electric operating control circuit and main incoming power
Earthed switch auxiliary contact.
Wherein, the solution lock interface is connected with second relay.
Wherein, the state detection circuit, mandate interface, solution lock interface and anti-error electric operating control circuit are integrated
Change and set.
(3) beneficial effect
Above-mentioned technical proposal of the present utility model has the following advantages that：
Due to installing a state detection circuit on the earthed switch of subordinate's ring-main unit cabinet incoming line cabinet, when earthed switch closes
During lock, state detection circuit output block signal, when grounding switch tripping, state detection circuit exports unlocking signal；Electronics is tested
Electrical key is with authorizing Interference fit, when insertion authorizes interface to obtain earthed switch folding condition information；Electric locking terminal
It is connected with the on-load switch of higher level's ring-main unit cabinet incoming line cabinet, after the unlocking signal of electronics electrical verification key is obtained, just opens negative
Lotus switchs, and carries out power transmission；So by ring network power supply anti-misoperation system of the present utility model, solve different ring main unit power transmissions
Earthed switch does not have the problem of separating brake；Solve the problems, such as that single looped network cabinet wire misses splice grafting earthing knife-switch, avoid multiple ring main units from existing
Maloperation in looped network transmission process；Installation process is convenient and swift without having a power failure；The effective guarantee personal safety of operating personnel
And the safe operation of equipment.
Brief description of the drawings
Fig. 1 is the structural representation of ring network power supply in the prior art.
Fig. 2 is the control structure schematic diagram of the utility model ring network power supply anti-misoperation system；
Fig. 3 is the signal that the shell mechanism of the utility model ring network power supply anti-misoperation system coordinates with electronics electrical verification key
Figure；
Fig. 4 is that the unlocking manner of electronic unblock and manual unlocking is illustrated in the utility model ring network power supply anti-misoperation system
Figure；
Fig. 5 is that the control principle of anti-error electric operating control circuit in the utility model ring network power supply anti-misoperation system shows
It is intended to.
In figure：1st, anti-error electric operating control circuit；2nd, the first relay；3rd, the second relay；4th, motor-operating mechanism；
5th, earthed switch auxiliary contact；6th, lock interface is solved；7th, no mandate interface；8th, electronics electrical verification key；9th, housing；10th, the first node；
11st, the second node.
Embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is used to illustrate the utility model, but is not limited to the scope of the utility model.
In description of the present utility model, it is to be understood that term be " instruction such as " center ", " top ", " bottom " " interior ", " outer "
Orientation or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of description the utility model and simplification
Description, rather than the device or element of instruction or hint meaning must have specific orientation, with specific azimuth configuration and behaviour
Make, therefore it is not intended that to limitation of the present utility model.In addition, term " first ", " second " are only used for describing purpose, without
It is understood that to indicate or implying relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
As shown in Figure 1, Figure 2 and Figure 3, the ring network power supply anti-misoperation system that the utility model embodiment provides includes state
Detect circuit, authorize interface 7, electronics electrical verification key 8, solution lock interface 6, electric locking terminal；State detection circuit is arranged on down
On the earthed switch G1-1 of level ring-main unit cabinet (being specially unit B) incoming line cabinet (cabinet 1), to detect earthed switch G1-1 folding
State；Interface 7 is authorized to be connected with state detection circuit, electronics electrical verification key 8 authorizes interface 7 with authorizing interface 7 to coordinate, in insertion
When to obtain earthed switch folding condition information；Electric locking terminal and higher level's ring-main unit cabinet (being specially A units) incoming line cabinet
The on-load switch K2 of (cabinet 2) is connected, to control on-load switch K2 folding；Solution lock interface 6 is connected with electric locking terminal, electronics
Electrical verification key 8 coordinates with solution lock interface 6, the folding when insertion solves lock interface 6 to be switched to electric locking terminal input grounding
Status information.
In above-described embodiment, one state detection circuit is installed in the earthed switch G1-1 of unit B, as earthed switch G1-1
During combined floodgate, state detection circuit output block signal, when earthed switch G1-1 separating brakes, state detection circuit exports unlocking signal；
Electronics electrical verification key 8 is with authorizing interface 7 to coordinate, when insertion authorizes interface 7 to obtain earthed switch folding condition information；Electronics
Locking terminal is connected with the on-load switch K2 of higher level's ring-main unit cabinet (being specially A units) incoming line cabinet (cabinet 2), is tested obtaining electronics
After the unlocking signal of Electrical key 8, on-load switch K2 is just opened, carries out power transmission；It is that is, necessary when wanting power transmission on-load switch K2 to close a floodgate
It could be operated with the electrical verification of electronics electrical verification key 8, the unlocking signal got is exactly that unit B earthed switch G1-1 separating brakes are not grounded,
Power transmission operation can be carried out.
Subordinate is needed to authorize while to subordinate's power transmission in ring network power supply anti-misoperation system of the present utility model, it is this
Mode solves the problems, such as that different ring main unit power transmission earthed switches do not have separating brake；Solve single looped network cabinet wire and miss splice grafting earthing knife-switch
The problem of, avoid maloperation of multiple ring main units in looped network transmission process；Installation process is convenient and swift without having a power failure；Effectively
The personal safety of operating personnel and the safe operation of equipment are ensured.
Specifically, state detection circuit is connected with earthed switch G1-1 auxiliary contact；The state of detection circuit takes ground connection
Auxiliary contact is switched, when earthed switch closes a floodgate, state detection circuit output block signal, state is examined when grounding switch tripping
Slowdown monitoring circuit exports unlocking signal.
Specifically, electronics electrical verification key 8 includes memory module and the power module being sequentially connected, key controller module and tested
Electric connection, electrical verification joint is with authorizing interface 7 to be engaged, in order to which key controller module obtains the folding condition letter of earthed switch
Breath；Memory module is connected with key controller module, to store the folding condition information of earthed switch.
Specifically, electronics electrical verification key 8 also includes display module and alarm modules, and display module connects with key controller module
Connect, to show the folding condition information of earthed switch, specifically, display module is two display lamps, red light and green light, green light
When show to have got unlocking signal, represent block signal during when red；Alarm modules are connected with key controller module, are connect in electrical verification
Head insertion solution latching connector and on-load switch sends a warning when being not turned on, show that Tthe utility model system has failure, need
Overhaul.
Electric locking terminal, which is unlocked, in the utility model two kinds of forms, and one kind is manual mode, and one kind is electric model.
Specifically, electric padlock locking terminal is installed at the on-load switch K2 handle holes of A unit cabinets 2, electric locking is whole
Hold and be located at for electric padlock locking terminal, solution lock interface 6 in electric padlock locking terminal；Electronics electrical verification key 8 gets unlocking letter
After number, insert in the keyhole (solution lock interface 6) of electric padlock locking terminal, electric padlock is opened, so as to open load
Close K2 and carry out combined floodgate power transmission groove；It is exactly that unit B cabinet earthed switch G1-1 is not grounded to get unlocking signal, can carry out power transmission behaviour
Make.
Another prevents that electric operating misdelivery is electrically operated with regard to this, and electric locking terminal is anti-error electric operating control circuit
1, anti-error electric operating control circuit 1 is arranged on the main inlet wire of motor-operating mechanism 4, anti-error electric operating control circuit 1 with
Solution lock interface 6 connects.Electronics electrical verification key 8 inserts solution lock interface 6 herein, and anti-error electric operating control circuit 1, which obtains, unlocks
After signal, the main inlet wire of motor-operating mechanism 4 just turns on power supply, motor-operating mechanism 4 and then Electronic control on-load switch K2,
On-load switch K2, which closes a floodgate, carries out power transmission, wherein, A unit cabinets are connected between anti-error electric operating control circuit 1 and main incoming power
Earthed switch G2 earthed switch auxiliary contact 5, because being required according to anti-misoperation, the contact is opened with motor-operating mechanism 4
Conjunction is consistent.Electric operating can carry out remote operation and local operation, and electrically operated principle is actually in A units
Cabinet 2 is found into electrically operated motor-operating mechanism 4, the main inlet wire of motor-operating mechanism 4 with an anti-error electric operating
The control of control circuit 1 is got up.
Specifically, anti-error electric operating control circuit 1 includes the first relay 2, the second relay 3, the and of the first node 10
Second node 11；First node 10 is connected with motor-operating mechanism 4, the power input of the second node 11 and motor-operating mechanism 4
End connection；First relay 2 is connected between the first node 10 and the second node 11, and the second relay 3 is connected to the first node
10 and second between node 11；Specifically, solution lock interface 6 is connected with the second relay 3.
In above-mentioned control circuit, solution lock interface 6, which is connected to after electrical verification unlocking information, to be triggered the second relay 3 and works, second after
Electrical equipment 3 connects the first node 10 with the second node 11, and motor-operating mechanism 4 works, and controls on-load switch K2 combined floodgate power transmissions；Together
When, after the first node 10 connects with the second node 11, the first relay 2 acquisition power supply, and the work that is triggered, in electronics electrical verification key
After spoon 8 is removed, in the case that the disconnection of the second relay 3 is stopped, the work of the constant conduction of the first relay 2, electronic behaviour is maintained
Make the work of mechanism 4, power transmission state continues.
Further, it is above-mentioned prevent electric operating misdeliver electrically operated operation principle can do it is described below：
3.1A units earthed switch (G2) is connected in series to power supply major loop, is accessed by the first relay 2 and the second relay 3
Motor-operating mechanism 4, after earthed switch G2 separating brakes, earthed switch auxiliary contact 5 turn on；Auxiliary contact after earthed switch G2 closes a floodgate
Disconnect, major loop is stopped power supply；When now operating the on-load switch of A unit cabinets 2 combined floodgate, controlled by mechanical interlocking, it is necessary to first
By earthed switch G2 separating brakes, major loop ground auxiliary contact are begun to turn on after separating brake, by being got after the electrical verification of electronics electrical verification key 8
After unlocking instruction, electronics electrical verification key 8 and electrical verification interface (solution lock interface 6) control circuit communication, the second relay 3KA2 is driven
Conducting, after the second relay 3KA2 conductings, the first relay 2KA1 obtains power supply and starts to be held on, now motor-operating mechanism
4 obtain power supply, and electronics electrical verification key 8, which is removed, completes combined floodgate power transmission.
Directly carrying out a distant place and local operation during the 3.2 electronic separating brake of needs can complete, after power failure, at on-load switch KA2
In gate-dividing state, earthed switch G2 can be closed a floodgate, carry out inspection operation flow, be now grounded auxiliary contact and be in open circuit shape
State, the step of rear power transmission operation need to repeat 3.1 is overhauled.
Preferably, as shown in figure 3, state detection circuit, mandate interface 7, solution lock interface 6 and anti-error electric operating control electricity
1 integrated setting of road, to be arranged on housing 9；So that the utility model integrated level is high, be easy to carry operation.
It the above is only preferred embodiment of the present utility model, it is noted that for the ordinary skill people of the art
Member for, on the premise of the utility model technical principle is not departed from, some improvement and modification can also be made, these improve and
Modification also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of ring network power supply anti-misoperation system, it is characterised in that including state detection circuit, authorize interface, electronics electrical verification
Key, solution lock interface, electric locking terminal；The ground connection that the state detection circuit is arranged on subordinate's ring-main unit cabinet incoming line cabinet is opened
Shut, to detect the folding condition of the earthed switch；The mandate interface is connected with the state detection circuit, the electronics
Electrical verification key and the mandate Interference fit, when insertion authorizes interface to obtain the earthed switch folding condition information；Institute
The on-load switch that electric locking terminal is stated with higher level's ring-main unit cabinet incoming line cabinet is connected, to control the folding of the on-load switch；
The solution lock interface is connected with the electric locking terminal, the electronics electrical verification key and the unblock Interference fit, is being inserted
To input the folding condition information of the earthed switch to the electric locking terminal when solving lock interface.
2. ring network power supply anti-misoperation system as claimed in claim 1, it is characterised in that the state detection circuit with it is described
The auxiliary contact connection of earthed switch.
3. ring network power supply anti-misoperation system as claimed in claim 1, it is characterised in that the electronics electrical verification key includes depositing
Storage module and power module, key controller module and the electrical verification joint being sequentially connected, electrical verification joint match with the mandate interface
Close；The memory module is connected with the key controller module, to store the folding condition information of earthed switch.
4. ring network power supply anti-misoperation system as claimed in claim 3, it is characterised in that：The electronics electrical verification key also includes
Display module and alarm modules, the display module are connected with the key controller module, to show the folding shape of earthed switch
State information；The alarm modules are connected with the key controller module, and in electrical verification joint insertion solution latching connector, on-load switch does not have
Sent a warning when having opening.
5. ring network power supply anti-misoperation system as claimed in claim 1, it is characterised in that：The electric locking terminal is electronics
Padlock locking terminal, the solution lock interface are located in electric padlock locking terminal；The electric padlock locking terminal is arranged on institute
State on the handle hole of on-load switch.
6. ring network power supply anti-misoperation system as claimed in claim 1, it is characterised in that：The electric locking terminal is anti-error
Electric operating control circuit, the anti-error electric operating control circuit are arranged on the main inlet wire of motor-operating mechanism, described anti-
Electric operating control circuit is connected with the solution lock interface by mistake.
7. ring network power supply anti-misoperation system as claimed in claim 6, it is characterised in that：The anti-error electric operating control electricity
Road includes the first relay, the second relay, the first node and the second node；First node connects with the motor-operating mechanism
Connect, the second node is connected with the power input of the motor-operating mechanism；First relay be connected to the first node and
Between second node, the second relay is connected between the first node and the second node.
8. ring network power supply anti-misoperation system as claimed in claim 7, it is characterised in that：The anti-error electric operating control electricity
Higher level's ring-main unit cabinet incoming line cabinet earthed switch auxiliary contact are connected between Lu Yuzhu incoming powers.
9. ring network power supply anti-misoperation system as claimed in claim 7, it is characterised in that：The solution lock interface and described second
Relay connects.
10. the ring network power supply anti-misoperation system as described in claim any one of 1-9, it is characterised in that：The state-detection
Circuit, authorize interface, solution lock interface and the anti-error integrated setting of electric operating control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720536328.4U CN206790101U (en) | 2017-05-16 | 2017-05-16 | A kind of ring network power supply anti-misoperation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720536328.4U CN206790101U (en) | 2017-05-16 | 2017-05-16 | A kind of ring network power supply anti-misoperation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206790101U true CN206790101U (en) | 2017-12-22 |
Family
ID=60712366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720536328.4U Active CN206790101U (en) | 2017-05-16 | 2017-05-16 | A kind of ring network power supply anti-misoperation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206790101U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069719A (en) * | 2017-05-16 | 2017-08-18 | 华电北瑞电气(北京)有限公司 | A kind of ring network power supply anti-misoperation system |
| CN108333513A (en) * | 2018-03-09 | 2018-07-27 | 中广核核电运营有限公司 | Generator electrical test regional interlock system and its operating method |
-
2017
- 2017-05-16 CN CN201720536328.4U patent/CN206790101U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069719A (en) * | 2017-05-16 | 2017-08-18 | 华电北瑞电气(北京)有限公司 | A kind of ring network power supply anti-misoperation system |
| CN107069719B (en) * | 2017-05-16 | 2024-02-13 | 华电北瑞电气(北京)有限公司 | Looped network power supply misoperation prevention system |
| CN108333513A (en) * | 2018-03-09 | 2018-07-27 | 中广核核电运营有限公司 | Generator electrical test regional interlock system and its operating method |
| CN108333513B (en) * | 2018-03-09 | 2024-03-12 | 中广核核电运营有限公司 | Generator electrical test area interlock system and method of operating same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101692524B (en) | Anti-misoperation method and device for power system based on wireless communication | |
| CN105488872B (en) | Switch cubicle anti-misoperation locking device and its method of work | |
| CN201150012Y (en) | Locking device for safely monitoring electric power line | |
| CN204144704U (en) | Switch cubicle anti-misoperation locking lockset and anti-misoperation locking device | |
| CN101867159A (en) | Device for preventing high-voltage switch cabinet from being locked by mistake | |
| CN205476947U (en) | Remote management intelligence cabinet lock | |
| CN107946934A (en) | Power distribution automation cabinet and its application | |
| CN206790101U (en) | A kind of ring network power supply anti-misoperation system | |
| CN103475101A (en) | Misoperation-preventive locking management system of temporary ground wire of substation | |
| CN204044230U (en) | With the high voltage display device that error proof locking system of microcomputer is supporting | |
| CN209365943U (en) | A kind of control system of split type alternating-current charging pile | |
| CN103309336A (en) | Online substation five-prevention system and unlocking method thereof | |
| CN202076678U (en) | Five-prevention voice prompt intelligent unlocking key box of transformer substation | |
| CN109542013A (en) | The parallel electrical anti-misoperation locking device of microcomputer | |
| CN106655463B (en) | Safe related function and sound-light alarm integrated logic system for voltage parallel device | |
| CN106972489A (en) | The positive and negative two-way anti-misoperation system of ring network power supply | |
| CN207098611U (en) | The positive and negative two-way anti-misoperation system of ring network power supply | |
| CN107069719A (en) | A kind of ring network power supply anti-misoperation system | |
| CN205657497U (en) | Online management system of earthing for work line | |
| CN110273587B (en) | Anti-misoperation lockset of ring main unit grounding switch | |
| CN207382053U (en) | A kind of integrated high-voltage switch cabinet electrical verification anti-misoperation system | |
| CN207938480U (en) | A kind of passive blocking device of 10kV open lockings incoming line cabinet | |
| CN104732625A (en) | Method and device for unlocking key management box on basis of fingerprint identification technology | |
| CN104832009A (en) | Design scheme of intelligent locking apparatus for center control lock | |
| CN208872775U (en) | A kind of slotting handle of the aviation applied to Overhaul site |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |