CN107069719B - Looped network power supply misoperation prevention system - Google Patents
Looped network power supply misoperation prevention system Download PDFInfo
- Publication number
- CN107069719B CN107069719B CN201710346859.1A CN201710346859A CN107069719B CN 107069719 B CN107069719 B CN 107069719B CN 201710346859 A CN201710346859 A CN 201710346859A CN 107069719 B CN107069719 B CN 107069719B
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- electronic
- misoperation
- interface
- grounding switch
- power supply
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- 230000002265 prevention Effects 0.000 title claims abstract description 18
- 230000005611 electricity Effects 0.000 claims abstract description 47
- 238000013475 authorization Methods 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000012795 verification Methods 0.000 claims abstract description 23
- 238000003860 storage Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 18
- 238000011900 installation process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to the technical field of power and electricity, in particular to a looped network power supply misoperation prevention system. The ring network power supply misoperation prevention system comprises a state detection circuit, an authorization interface, an electronic electricity verification key, an unlocking interface and an electronic locking terminal; a state detection circuit is arranged on a grounding switch of the incoming line cabinet of the lower ring main unit cabinet, an electronic electricity checking key is matched with an authorization interface, and opening and closing state information of the grounding switch is obtained when the electronic electricity checking key is inserted into the authorization interface; the electronic locking terminal is connected with a load switch of the upper ring main unit cabinet inlet wire cabinet, and the load switch is turned on to transmit power after an unlocking signal of the electronic electricity checking key is obtained; therefore, the ring network power supply misoperation prevention system solves the problem that the power transmission grounding switch of different ring network cabinets is not opened, and misoperation of a plurality of ring network cabinets in the ring network power transmission process is avoided; the installation process is convenient and quick without power failure; the personal safety of operators and the safe operation of equipment are effectively ensured.
Description
Technical Field
The invention relates to the technical field of power and electricity, in particular to a looped network power supply misoperation prevention system.
Background
At present, the looped netowrk cabinet mainly comprises unit cabinets such as inlet wire cabinet and outlet wire cabinet, and every unit cabinet of group includes one or more inlet wire cabinet, and a plurality of unit cabinets are connected by its inlet wire cabinet and are constituteed looped netowrk power supply system, and the structural schematic diagram of looped netowrk power supply is as shown in figure 1. The system comprises a unit A and a unit B, wherein the unit A is an upper ring network unit cabinet and comprises a cabinet 1, a cabinet 2, a cabinet 3 and a cabinet 4, wherein the cabinet 2 is an incoming line cabinet of the unit A; the unit B is a lower ring network unit cabinet and comprises a cabinet 1, a cabinet 2, a cabinet 3 and a cabinet 4, wherein the cabinet 1 is a unit B inlet wire cabinet; the grounding switch of the incoming cabinet of the lower ring network unit cabinet is G1-1, and the load switch (or called a breaker) of the incoming cabinet of the upper ring network unit cabinet is K2.
The operating mechanism of the ring main unit cabinet is divided into a manual mode and an electric mode, generally, a locking device is arranged at an operating hole of a load switch, and the load switch can be controlled through electric operation. The mechanical interlocking control is arranged between the load switch or the breaker and the grounding knife in the unit interval of the ring main unit, so that the following two five-prevention requirements can be realized, and the forced locking can be realized:
1. the load switch or the breaker can not transmit power to close when the grounding knife is closed;
2. the ground switch can not be switched on when the load switch or the breaker is switched on.
By forced locking, short-circuit ground faults caused by power transmission misoperation can be effectively prevented.
In operation of the ring main unit, according to the analysis of the schematic diagram, when K2 (load switch) of the a unit transmits power, the 1-interval ground switch G1-1 of the B unit must be in a split state, otherwise, ground fault and short circuit fault are caused.
However, in the prior art, because the independent unit cabinets are arranged, the mechanical interlocking control is not available between the different unit cabinets, and the problem that the grounding knife is connected in a live-line manner by mistake is easily caused in the operation process, namely, the lower grounding knife is not disconnected, and the upper grounding knife is powered in a mistake.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problem of providing a ring network power supply misoperation prevention system so as to solve the problems that a plurality of ring network cabinets are easy to operate by mistake during ring network power supply, and are easy to cause harm to personal safety of operators and safe operation of equipment.
(II) technical scheme
In order to solve the technical problems, the ring network power supply misoperation prevention system provided by the invention comprises a state detection circuit, an authorization interface, an electronic electricity verification key, an unlocking interface and an electronic locking terminal; the state detection circuit is arranged on a grounding switch of the incoming line cabinet of the lower ring main unit cabinet so as to detect the opening and closing states of the grounding switch; the authorization interface is connected with the state detection circuit, the electronic electricity verification key is matched with the authorization interface, and the opening and closing state information of the grounding switch is obtained when the electronic electricity verification key is inserted into the authorization interface; the electronic locking terminal is connected with a load switch of the upper ring main unit cabinet inlet wire cabinet so as to control the opening and closing of the load switch; the unlocking interface is connected with the electronic locking terminal, the electronic electricity checking key is matched with the unlocking interface, and when the unlocking interface is inserted, the opening and closing state information of the grounding switch is input to the electronic locking terminal.
The state detection circuit is connected with the auxiliary contact of the grounding switch.
The electronic electricity verification key comprises a storage module, a power module, a key control module and an electricity verification connector which are sequentially connected, and the electricity verification connector is matched with the authorization interface; the storage module is connected with the key control module to store the opening and closing state information of the grounding switch.
The electronic electricity verification key further comprises a display module and an alarm module, wherein the display module is connected with the key control module to display the on-off state information of the grounding switch; the alarm module is connected with the key control module and sends out alarm information when the electricity checking connector is inserted into the unlocking connector and the load switch is not opened.
The electronic locking terminal is an electronic padlock locking terminal, and the unlocking interface is positioned on the electronic padlock locking terminal; the electronic padlock locking terminal is arranged on the operation hole of the load switch.
The electronic locking terminal is an anti-misoperation electric operation control circuit, the anti-misoperation electric operation control circuit is arranged on a main inlet wire of the electric operation mechanism, and the anti-misoperation electric operation control circuit is connected with the unlocking interface.
The anti-misoperation control circuit comprises a first relay, a second relay, a first node and a second node; the first node is connected with the electric operating mechanism, and the second node is connected with the power input end of the electric operating mechanism; the first relay is connected between the first node and the second node, and the second relay is connected between the first node and the second node.
The auxiliary contact of the grounding switch of the upper ring main unit cabinet is connected between the anti-misoperation electric operation control circuit and the main incoming line power supply.
The unlocking interface is connected with the second relay.
The state detection circuit, the authorization interface, the unlocking interface and the misoperation prevention control circuit are integrated into a whole.
(III) beneficial effects
The technical scheme of the invention has the following advantages:
because the grounding switch of the lower ring main unit cabinet inlet wire cabinet is provided with a state detection circuit, when the grounding switch is closed, the state detection circuit outputs a locking signal, and when the grounding switch is opened, the state detection circuit outputs an unlocking signal; the electronic electricity checking key is matched with the authorization interface, and when the electronic electricity checking key is inserted into the authorization interface, the opening and closing state information of the grounding switch is obtained; the electronic locking terminal is connected with a load switch of the upper ring main unit cabinet inlet wire cabinet, and the load switch is turned on to transmit power after an unlocking signal of the electronic electricity checking key is obtained; therefore, the looped network power supply misoperation prevention system solves the problem that the power transmission grounding switches of different looped network cabinets are not separated; the problem that a single ring main unit is connected with a grounding knife by mistake is solved, and misoperation of a plurality of ring main units in the ring network power transmission process is avoided; the installation process is convenient and quick without power failure; the personal safety of operators and the safe operation of equipment are effectively ensured.
Drawings
Fig. 1 is a schematic diagram of a ring network power supply structure in the prior art.
FIG. 2 is a schematic diagram of a control structure of the loop network power supply anti-misoperation system of the invention;
FIG. 3 is a schematic diagram of the cooperation between the housing structure of the loop network power supply anti-misoperation system and the electronic verification key;
fig. 4 is a schematic diagram of an unlocking mode of electric unlocking and manual unlocking in the ring network power supply misoperation prevention system;
fig. 5 is a schematic diagram of a control principle of an anti-misoperation control circuit in the looped network power supply anti-misoperation system.
In the figure: 1. an anti-misoperation control circuit; 2. a first relay; 3. a second relay; 4. an electric operating mechanism; 5. an auxiliary contact of the grounding switch; 6. unlocking the interface; 7. an authorization interface; 8. an electronic electricity checking key; 9. a housing; 10. a first node; 11. and a second node.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "top", "bottom", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, fig. 2 and fig. 3, the ring network power supply misoperation prevention system provided by the embodiment of the invention comprises a state detection circuit, an authorization interface 7, an electronic electroscope key 8, an unlocking interface 6 and an electronic locking terminal; the state detection circuit is arranged on a grounding switch G1-1 of a lower ring main unit cabinet (specifically a B unit) incoming line cabinet (cabinet 1) to detect the opening and closing states of the grounding switch G1-1; the authorization interface 7 is connected with the state detection circuit, and the electronic electricity verification key 8 is matched with the authorization interface 7 to acquire the opening and closing state information of the grounding switch when the authorization interface 7 is inserted; the electronic locking terminal is connected with a load switch K2 of an incoming line cabinet (cabinet 2) of an upper ring network unit cabinet (specifically an A unit) to control the opening and closing of the load switch K2; the unlocking interface 6 is connected with the electronic locking terminal, and the electronic electricity checking key 8 is matched with the unlocking interface 6 to input the opening and closing state information of the grounding switch to the electronic locking terminal when the unlocking interface 6 is inserted.
In the above embodiment, a state detection circuit is installed on the ground switch G1-1 of the B unit, and outputs a locking signal when the ground switch G1-1 is closed, and outputs an unlocking signal when the ground switch G1-1 is opened; the electronic electricity checking key 8 is matched with the authorization interface 7, and when the electronic electricity checking key is inserted into the authorization interface 7, the opening and closing state information of the grounding switch is obtained; the electronic locking terminal is connected with a load switch K2 of an incoming line cabinet (cabinet 2) of an upper ring network unit cabinet (specifically an A unit), and the load switch K2 is opened to transmit power after an unlocking signal of an electronic electricity checking key 8 is acquired; that is, when the power transmission load switch K2 is to be switched on, the electronic verification key 8 must be used to verify the power to perform the power transmission operation, and the unlocking signal obtained is that the switch-off of the B unit grounding switch G1-1 is not grounded, so that the power transmission operation can be performed.
In the ring network power supply misoperation prevention system, lower-level authorization is needed when power is transmitted to the lower-level, and the mode solves the problem that the power transmission grounding switches of different ring network cabinets are not separated; the problem that a single ring main unit is connected with a grounding knife by mistake is solved, and misoperation of a plurality of ring main units in the ring network power transmission process is avoided; the installation process is convenient and quick without power failure; the personal safety of operators and the safe operation of equipment are effectively ensured.
Specifically, the state detection circuit is connected with an auxiliary contact of the ground switch G1-1; the state of the detection circuit is taken as an auxiliary contact of the grounding switch, when the grounding switch is closed, the state detection circuit outputs a locking signal, and when the grounding switch is opened, the state detection circuit outputs an unlocking signal.
Specifically, the electronic electricity checking key 8 comprises a storage module, a power module, a key control module and an electricity checking connector which are sequentially connected, wherein the electricity checking connector is matched with the authorization interface 7 so that the key control module can acquire the opening and closing state information of the grounding switch; the storage module is connected with the key control module to store the opening and closing state information of the grounding switch.
Specifically, the electronic electricity checking key 8 further comprises a display module and an alarm module, wherein the display module is connected with the key control module to display the opening and closing state information of the grounding switch, specifically, the display module comprises two display lamps, namely a red lamp and a green lamp, when the green lamp is on, an unlocking signal is indicated to be taken, and when the red lamp is on, a locking signal is indicated to be taken; the alarm module is connected with the key control module, and sends out alarm information when the electric inspection connector is inserted into the unlocking connector and the load switch is not opened, so that the system has faults and needs to be overhauled.
The unlocking of the electronic locking terminal is in two forms, namely a manual mode and an electric mode.
Specifically, an electronic padlock locking terminal is installed at an operation hole of a load switch K2 of the unit cabinet A2, the electronic padlock locking terminal is an electronic padlock locking terminal, and an unlocking interface 6 is positioned on the electronic padlock locking terminal; after the unlocking signal is obtained by the electronic electricity verification key 8, the electronic electricity verification key is inserted into a key hole (an unlocking interface 6) of a locking terminal of the electronic padlock, and the electronic padlock is opened, so that a closing electricity transmission groove can be formed in the load switch K2; the unlocking signal is that the grounding switch G1-1 of the unit cabinet B is not grounded, and power transmission operation can be performed.
Another type of this prevents the erroneous power transmission operation by the electric operation, and the electronic lock terminal is the erroneous electric operation preventing control circuit 1, and the erroneous electric operation preventing control circuit 1 is provided on the main feed line of the electric operation mechanism 4, and the erroneous electric operation preventing control circuit 1 is connected to the unlock interface 6. After the electronic electricity verification key 8 is inserted into the unlocking interface 6, the main incoming line of the electric operating mechanism 4 is conducted with the power supply after the unlocking signal is acquired by the misoperation-preventing electric operating control circuit 1, the electric operating mechanism 4 further electrically controls the load switch K2, and the load switch K2 is switched on to transmit power, wherein the misoperation-preventing electric operating control circuit 1 is connected with the grounding switch auxiliary contact 5 of the unit cabinet grounding switch G2 between the main incoming line power supply, and because the opening and closing of the auxiliary contact is consistent with the opening and closing logic of the corresponding electric operating mechanism according to the misoperation-preventing requirement. The electric operation can be performed in remote operation and in-situ operation, and the principle of the electric operation is that the electric operation mechanism 4 entering the electric operation is found in the unit cabinet A2, and the main incoming line of the electric operation mechanism 4 is controlled by an anti-misoperation electric operation control circuit 1.
Specifically, the erroneous electric operation prevention control circuit 1 includes a first relay 2, a second relay 3, a first node 10, and a second node 11; the first node 10 is connected with the electric operating mechanism 4, and the second node 11 is connected with the power input end of the electric operating mechanism 4; the first relay 2 is connected between the first node 10 and the second node 11, and the second relay 3 is connected between the first node 10 and the second node 11; specifically, the unlock interface 6 is connected with the second relay 3.
In the control circuit, the unlocking interface 6 is connected to the electrolysis locking verification information to trigger the second relay 3 to work, the second relay 3 communicates the first node 10 with the second node 11, the electric operating mechanism 4 works, and the load switch K2 is controlled to switch on for power transmission; meanwhile, after the first node 10 and the second node 11 are communicated, the first relay 2 obtains a power supply and is triggered to work, and when the second relay 3 is disconnected and stops working after the electronic electricity checking key 8 is taken down, the first relay 2 is continuously conducted to work, the work of the electric operating mechanism 4 is maintained, and the power transmission state is continuous.
Further, the above operation principle of preventing the erroneous power transmission by the electric operation may be described as follows:
3.1A unit grounding switch (G2) is connected in series to the power supply main loop, and is connected to the electric operating mechanism 4 through the first relay 2 and the second relay 3, and after the grounding switch G2 is opened, the grounding switch auxiliary contact 5 is conducted; after the grounding switch G2 is switched on, the auxiliary contact is disconnected, and the main loop stops supplying power; when the load switch of the unit cabinet 2 is to be operated to switch on at this moment, under the control of mechanical interlocking, the grounding switch G2 must be firstly switched off, the main loop grounding auxiliary contact is started to be conducted after switching off, after an unlocking instruction is obtained after the electronic electricity checking key 8 is used for checking electricity, the electronic electricity checking key 8 is communicated with the control circuit of the electricity checking interface (unlocking interface 6), the second relay 3 (KA 2) is driven to be conducted, after the second relay 3 (KA 2) is conducted, the first relay 2 (KA 1) is powered on, the electric operating mechanism 4 is powered on, and the electronic electricity checking key 8 is taken down to finish switching on and power transmission.
3.2, the remote and on-site operation can be directly performed when the electric brake is required to be opened, after the power failure occurs, the load switch is in a brake opening state, the grounding switch G2 can be switched on, the overhaul operation flow is performed, the grounding auxiliary contact is in an open state at the moment, and the power transmission operation needs to be repeated by 3.1 after the overhaul is completed.
Preferably, as shown in fig. 3, the state detection circuit, the authorization interface 7, the unlocking interface 6 and the anti-misoperation control circuit 1 are integrally arranged on the shell 9; therefore, the invention has high integration level and is convenient to carry and operate.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (5)
1. The ring network power supply misoperation prevention system is characterized by comprising a state detection circuit, an authorization interface, an electronic electricity verification key, an unlocking interface and an electronic locking terminal; the state detection circuit is arranged on a grounding switch of the incoming line cabinet of the lower ring main unit cabinet so as to detect the opening and closing states of the grounding switch; the authorization interface is connected with the state detection circuit, the electronic electricity verification key is matched with the authorization interface, and the opening and closing state information of the grounding switch is obtained when the electronic electricity verification key is inserted into the authorization interface; the electronic locking terminal is connected with a load switch of the upper ring main unit cabinet inlet wire cabinet so as to control the opening and closing of the load switch; the unlocking interface is connected with the electronic locking terminal, the electronic electricity verification key is matched with the unlocking interface, and when the unlocking interface is inserted, the opening and closing state information of the grounding switch is input to the electronic locking terminal; the electronic locking terminal is an anti-misoperation electric operation control circuit, the anti-misoperation electric operation control circuit is arranged on a main inlet wire of the electric operation mechanism, and the anti-misoperation electric operation control circuit is connected with the unlocking interface; the misoperation prevention control circuit comprises a first relay, a second relay, a first node and a second node; the first node is connected with the electric operating mechanism, and the second node is connected with the power input end of the electric operating mechanism; the first relay is connected between the first node and the second node, and the second relay is connected between the first node and the second node; the unlocking interface is connected with the second relay; the state detection circuit is connected with an auxiliary contact of the grounding switch; and an auxiliary contact of the grounding switch of the upper ring main unit cabinet is connected between the misoperation prevention control circuit and the main incoming line power supply.
2. The loop network power supply misoperation prevention system according to claim 1, wherein the electronic electricity verification key comprises a storage module, a power module, a key control module and an electricity verification connector which are connected in sequence, wherein the electricity verification connector is matched with the authorization interface; the storage module is connected with the key control module to store the opening and closing state information of the grounding switch.
3. The ring network power supply anti-misoperation system as claimed in claim 2, wherein: the electronic electricity verification key further comprises a display module and an alarm module, wherein the display module is connected with the key control module to display the opening and closing state information of the grounding switch; the alarm module is connected with the key control module and sends out alarm information when the electricity checking connector is inserted into the unlocking connector and the load switch is not opened.
4. The ring network power supply anti-misoperation system as claimed in claim 1, wherein: the electronic locking terminal is an electronic padlock locking terminal, and the unlocking interface is positioned on the electronic padlock locking terminal; the electronic padlock locking terminal is arranged on the operation hole of the load switch.
5. The looped network power anti-misoperation system according to any of claims 1 to 4 wherein: the state detection circuit, the authorization interface, the unlocking interface and the anti-misoperation electric operation control circuit are integrated into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710346859.1A CN107069719B (en) | 2017-05-16 | 2017-05-16 | Looped network power supply misoperation prevention system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710346859.1A CN107069719B (en) | 2017-05-16 | 2017-05-16 | Looped network power supply misoperation prevention system |
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| Publication Number | Publication Date |
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| CN107069719A CN107069719A (en) | 2017-08-18 |
| CN107069719B true CN107069719B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710346859.1A Active CN107069719B (en) | 2017-05-16 | 2017-05-16 | Looped network power supply misoperation prevention system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107621805A (en) * | 2017-09-30 | 2018-01-23 | 国网黑龙江省电力有限公司黑河供电公司 | Electric substation's uniline anti-misoperation system |
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| JPH05325737A (en) * | 1992-05-28 | 1993-12-10 | Meidensha Corp | Wrong operation preventing device for circuit breaker and disconnector |
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| CN204144704U (en) * | 2014-09-19 | 2015-02-04 | 珠海优特电力科技股份有限公司 | Switch cubicle anti-misoperation locking lockset and anti-misoperation locking device |
| CN204947337U (en) * | 2015-07-22 | 2016-01-06 | 常州埃依琦科技有限公司 | A kind of anti-misoperation apparatus of electric force looped network cabinet |
| CN206790101U (en) * | 2017-05-16 | 2017-12-22 | 华电北瑞电气(北京)有限公司 | A kind of ring network power supply anti-misoperation system |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05325737A (en) * | 1992-05-28 | 1993-12-10 | Meidensha Corp | Wrong operation preventing device for circuit breaker and disconnector |
| CN101246783A (en) * | 2008-03-19 | 2008-08-20 | 江苏省电力公司常州供电公司 | Intelligent locking method of outdoor looped network cabinet wire spacing ground switch |
| CN201868947U (en) * | 2010-08-30 | 2011-06-15 | 珠海优特电力科技股份有限公司 | Anti-misoperation lock-out system |
| CN103556880A (en) * | 2013-10-31 | 2014-02-05 | 北京微能汇通电力技术有限公司 | Electricity testing unlocking system for high voltage switch cabinet |
| CN204144704U (en) * | 2014-09-19 | 2015-02-04 | 珠海优特电力科技股份有限公司 | Switch cubicle anti-misoperation locking lockset and anti-misoperation locking device |
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| CN107069719A (en) | 2017-08-18 |
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