CN114243368A - Misconnection-preventing high-voltage bypass live-line work device - Google Patents
Misconnection-preventing high-voltage bypass live-line work device Download PDFInfo
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- CN114243368A CN114243368A CN202111282639.XA CN202111282639A CN114243368A CN 114243368 A CN114243368 A CN 114243368A CN 202111282639 A CN202111282639 A CN 202111282639A CN 114243368 A CN114243368 A CN 114243368A
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- 238000007789 sealing Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000002265 prevention Effects 0.000 abstract description 5
- 238000004804 winding Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/64—Means for preventing incorrect coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/627—Snap or like fastening
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
- H01R13/7031—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity
Abstract
The invention relates to a misconnection prevention high-voltage bypass live working device, which comprises a circuit breaker, a voltage transformer and a quick access box, wherein the circuit breaker is arranged on an electric pole and connected with a cable on the electric pole, the voltage transformer is arranged on the electric pole and electrically connected with the circuit breaker, the quick access box comprises a box body, a quick connecting plug, a sealing door and a locking device, the quick connecting plug is connected to the other end of the circuit breaker and arranged on the box body, a socket of the quick connecting plug is positioned in the box body and faces to an opening of the box body, the sealing door is used for sealing the opening, the locking device is arranged on the box body, is connected with the voltage transformer and is simultaneously connected with the sealing door and is used for locking the sealing door in a sealing state when the power is switched on. The invention skillfully utilizes the circuit breaker and the locking device to realize the on-off and fool-proofing of the quick connecting plug, avoids the phenomenon that the quick connecting plug is inserted in a charged state, and avoids the occurrence of safety accidents.
Description
Technical Field
The invention relates to the technical field of high-voltage line maintenance operation, in particular to a misconnection-preventing high-voltage bypass live-line operation device.
Background
The bypass live working is an operation mode of temporarily transferring load current of a line at a maintenance section and isolating and stopping the line at a section to be maintained by utilizing a live working mode of bypass system equipment. For example, when a 10KV power supply distribution line is overhauled, live overhaul can be realized by overlapping bypass lines at two ends of an electric pole, and power failure of a user is avoided.
However, the lap joint bypass usually needs operations such as ascending a height and peeling a wire, and the process is complex and the working efficiency is low. The existing solution is to preset a quick access box on the electric pole, and the quick connection plug inside the quick access box is connected with the cable in advance, so that the bypass line can be built only by connecting the bypass cable directly with the quick connection plug in the quick access box. For example, chinese patent CN101888070B discloses a 10KV overhead distribution line fast power supply connection device, which comprehensively simplifies or cancels the work processes of field investigation, cable arrangement, vehicle placement, bypass equipment arrangement and the like in the original operation mode, and greatly shortens the access time.
However, the above-described device does not have a sufficient protection measure, and when an operator inserts the bypass cable into the quick connection plug in the quick access box, if the quick connection plug is not timely disconnected from the pole cable, an accident may occur.
Disclosure of Invention
In view of the above, there is a need for an anti-misconnection high-voltage bypass live-line work device, which solves the problem of how to prevent the quick-connect plug from being connected to the bypass cable when the quick-connect plug is not disconnected from the pole cable.
The invention provides a misconnection prevention high-voltage bypass live-wire work device, which comprises:
the circuit breaker is arranged on the electric pole, and one end of the circuit breaker is connected with a cable on the electric pole;
the voltage transformer is arranged on the electric pole, and the high-voltage end of the voltage transformer is electrically connected with the other end of the circuit breaker;
the quick access box comprises a box body, a quick connecting plug, a sealing door and a locking device, wherein the quick connecting plug is electrically connected to the other end of the circuit breaker and is arranged on the box body; the box body is provided with an opening, and a socket of the quick connecting plug is positioned in the box body and faces the opening; the closing door is connected with the box body and is used for closing the opening; the locking device is arranged on the box body, is electrically connected with the low-voltage end of the voltage transformer and is simultaneously connected with the closed door, and is used for locking the closed door in a closed state when the voltage transformer is electrified.
Preferably, the locking device is a sucker type electromagnet and is installed in the box body, the attraction surface of the locking device faces the opening, the closing door is hinged to the box body, and when the closing door is closed, the attraction surface of the locking device abuts against the closing door.
Preferably, the closing door is slidably connected to the cabinet, the sliding direction of the closing door being parallel to the plane of the closing door itself and to the plane of the opening.
Preferably, the locking device is a traction electromagnet, the fixed end of the locking device is installed outside the box body, the telescopic iron core of the locking device is connected to the closing door, and the telescopic direction of the telescopic iron core of the locking device is parallel to the sliding direction of the closing door.
Preferably, the locking device is an electric push rod, the fixed end of the locking device is installed on the outer side of the box body, the telescopic rod of the locking device is connected to the closing door, and the telescopic direction of the rod of the locking device is parallel to the sliding direction of the closing door.
Preferably, the circuit breaker is an isolating knife switch.
Preferably, the circuit breaker is a vacuum circuit breaker.
Preferably, the box is rectangular, the quick connection plug is inserted into the top surface of the box, and the opening is formed in the bottom surface of the box.
Preferably, still include the arrester, the arrester is installed in the pole, arrester and circuit breaker's the other end electric connection.
Preferably, the box is mounted to the pole.
The invention provides a misconnection-preventing high-voltage bypass live-line work device, wherein a quick connecting plug in a quick access box can be used for connecting a bypass cable, so that the bypass line can be quickly built. The quick connection plug is located in the box body and is sealed through the closing door, when the circuit breaking switch is not disconnected, the locker connected with the quick connection plug is powered on, the closing door is locked and cannot be opened, and at the moment, the connection operation cannot be carried out. The voltage transformer is positioned between the circuit of the circuit breaker and the circuit of the locking device, plays a role in voltage drop, and converts high voltage on the electric pole into low voltage required by the working of the locking device. When the circuit breaker is disconnected, the locking device loses power, the closing door can be easily opened at the moment, and an operator is allowed to carry out bypass building operation. After the bypass cable is built, the circuit breaker can be put into use by closing the circuit breaker again.
Compared with the prior art, the quick connection plug has the advantages that the on-off and fool-proofing of the quick connection plug are realized by skillfully utilizing the circuit breaker and the locking device, and the socket of the quick connection plug is completely sealed in the box body when the circuit breaker is not disconnected, so that any operation cannot be carried out, the phenomenon that the quick connection plug is inserted in a charged state is avoided, and the occurrence of safety accidents is avoided.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an anti-misconnection high-voltage bypass live-wire work device provided by the invention;
FIG. 2 is a schematic diagram of the quick access enclosure of FIG. 1;
fig. 3 is a schematic structural diagram of a quick access box in another embodiment of the mis-connection prevention high-voltage bypass live working device provided by the invention;
fig. 4 is a schematic structural diagram of a quick access box in another embodiment of the mis-connection prevention high-voltage bypass live working device provided by the invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
With reference to fig. 1-2, the invention provides an anti-misconnection high-voltage bypass live working device, which is used for building a bypass on an electric pole 100 and comprises a circuit breaker 1, a voltage transformer 2 and a quick access box 3. In which a disconnection switch 1 is mounted on a pole 100 and one end thereof is connected to a cable on the pole 100. The voltage transformer 2 is also installed on the electric pole 100, and it has the high-voltage terminal of connecting high-voltage line and the low-voltage terminal of connecting low-voltage line, and the high-voltage terminal of voltage transformer 2 and the other end electric connection of circuit breaker 1 in this embodiment can control the break-make between cable and the voltage transformer 2 on the electric pole 100 through circuit breaker 1 promptly.
The quick access box 3 includes a box body 31, a quick connection plug 32, a closing door 33, and a locker 34. The quick connection plug 32 is electrically connected to the other end of the circuit breaker 1 and is mounted on the box 31, and its socket is located in the box 31. The quick connection plug 32 in this embodiment is inserted into the box 31, and one end of the quick connection plug, which is away from the insertion opening, extends out of the box 31 to be connected with the circuit breaker 1. Of course, in practice, the quick connection plug 32 may be completely installed inside the box 31, and the connection between the quick connection plug 32 and the circuit breaker 1 is realized by a cable passing through the box 31, only by ensuring that the socket is located inside the box 31. In addition, according to the number of loops on the electric pole 100, two, three or more quick connection plugs 32 may be simultaneously disposed on one box 31, each quick connection plug 32 is connected to one phase of the cable, or one box 31, one closing door 33 and one locking device 34 may be separately configured for the quick connection plug 32 connected to each phase.
The housing 31 has an opening therein and the socket of the quick connect plug 32 is located within the housing 31 and facing the opening so that a person can extend the bypass cable from the opening to box connect with the quick connect plug 32. A closing door 33 is attached to the cabinet 31 for closing the opening of the cabinet 31, and a locker 34 is installed to the cabinet 31 to be electrically connected to the low voltage terminal of the voltage transformer 2 and simultaneously connected to the closing door 33 for locking the closing door 33 in a closed state when power is applied. The specific shape of the container body 31, the closing door 33, and the structure of the locker 34 will be described in detail later.
The invention provides a misconnection-preventing high-voltage bypass live-line work device, wherein a quick connecting plug 32 quickly connected into a box 3 can be used for connecting a bypass cable, so that a bypass line is quickly built. The quick connection plug 32 is located in the box 31 and is closed by the closing door 33, when the circuit breaker 1 is not disconnected, the lock 34 connected with the quick connection plug is electrified to lock the closing door 33, so that the closing door 33 cannot be opened, and at this time, the access operation cannot be carried out. The voltage transformer 2 is located between the circuit breaker 1 and the line of the lock 34, and functions as a voltage drop to convert the high voltage on the pole 100 to the low voltage required for the operation of the lock 34. When the circuit breaker 1 is turned off, the lock 34 is de-energized, and the closing door 33 can be easily opened at this time, allowing an operator to perform bypass building operation. After the bypass cable is built, the circuit breaker 1 is closed again to be put into use.
The lock 34 in this embodiment is only used to prevent the closing door 33 from being opened manually, and does not require excessive force, so that an electric device driven by low voltage is used, and therefore, in this embodiment, the voltage transformer 2 is additionally arranged in the lock 34 and the circuit breaker 1 to perform the function of transforming voltage. The basic structure of the potential transformer 2 is similar to that of a transformer, which also has two windings, one called the primary winding and one called the secondary winding, both of which are mounted on or wound around an iron core. Insulation is arranged between the two windings and between the windings and the iron core, so that the two windings and between the windings and the iron core are electrically isolated. In the operation of the voltage transformer 2, the primary winding is connected to the disconnecting switch 1 as the high-voltage terminal in the present embodiment, and the secondary winding is connected to the locker 34 as the low-voltage terminal in the present embodiment. Therefore, although the voltage of the high-voltage section is high and is half of 10KV, the low-voltage end is low, and the safety of operators can be ensured.
In fig. 1, it can be seen that two sets of mis-connection preventing high-voltage bypass live working devices are mounted on one electric pole 100 in the embodiment to perform bypass connection at two ends. In practice, depending on the type of the electric pole 100, such as a tension pole, a corner pole, etc., one or other number of the high-voltage bypass live working devices for preventing misconnection may be disposed on the electric pole 100.
Referring to fig. 2, as a preferred embodiment, the lock 34 in this embodiment is a suction disc type electromagnet, which is installed in the box 31, and the attraction surface of the lock 34 faces the opening. The closing door 33 is hinged to the cabinet 31, and is made of a metal material capable of being attracted by magnetic force at the inside thereof and covered with an insulating layer at the outside thereof. When the closing door 33 is closed, the attracting surface of the lock 34 abuts against the closing door 33, so that when the disconnection switch 1 is not disconnected, the lock 34 is energized to generate a magnetic force, and the closing door 33 is firmly attracted to prevent it from being opened. When the disconnection switch 1 is turned off, the magnetic force of the lock 34 disappears, and the closing door 33 is opened to perform the access operation.
As shown in fig. 3 to 4, the present invention also provides two preferred embodiments, wherein the closing door 33 is slidably connected to the box 31, the sliding direction of the closing door 33 is parallel to the plane of the closing door 33, and the sliding direction of the closing door 33 is also parallel to the plane of the opening. Therefore, parts such as a hinge shaft and the like in the quick access box 3 can be reduced, the cost is reduced, and the box body 31 is prevented from being rusted.
Referring to fig. 3, as a preferred embodiment, the lock 34 in this embodiment is a traction electromagnet. The traction electromagnet is mainly used for dragging a mechanical device to move and is provided with a fixed part and a movable iron core, and the electromagnet with the iron core capable of moving linearly is adopted in the embodiment. The fixed end of the locker 34 is installed outside the cabinet 31, the telescopic core of the locker 34 is coupled to the closing door 33, and the telescopic direction of the telescopic core of the locker 34 is parallel to the sliding direction of the closing door 33. Specifically, the outer side of the box 31 in this embodiment is provided with a slide rail, and the closing door 33 is located in the slide rail on the outer side of the box 31. The lock 34 is located above the door 33 with the telescopic core facing outwards and its end connected to the door 33 by a connecting block. When the power is turned on, the retractable core retracts to maintain the closing door 33 in a closed state. However, the travel of the traction electromagnet is generally short, and is suitable for a case 31 that is small.
Referring to fig. 4, as another preferred embodiment, the lock 34 in this embodiment is an electric push rod. The fixed end of the lock 34 is mounted outside the box 31, specifically, the box 31 has a connecting plate outside, the electric push rod is mounted below the connecting plate, the telescopic rod of the electric push rod faces the box 31 and is overlapped with the plane of the closing door 33, the end of the telescopic rod is connected with one side of the closing door 33, and the telescopic direction of the rod of the lock 34 is parallel to the sliding direction of the closing door 33. Further, the closing door 33 in the present embodiment is inserted into the box body 31 from the side. When the lock 34 is energized, the power push rod advances to close the opening with the door 33.
Referring again to fig. 1, as a preferred embodiment, the circuit breaker 1 is a vacuum circuit breaker. The vacuum circuit breaker is a common switch device in a high-voltage line, and prevents the formation of electric arcs by arranging a static contact and a moving contact in a closed vacuum cavity at the same time, so that the vacuum circuit breaker has good safety.
The invention also provides a preferable embodiment, the disconnecting prevention high-voltage bypass live working device adopts the isolation knife switch as the circuit breaker 1 so as to reduce the cost.
Referring to fig. 2 to 4, as a preferred embodiment, the box 31 in this embodiment is a rectangular box, the quick connection plug 32 is inserted into the top surface of the box 31, and the opening is opened on the bottom surface of the box 31. Thus, the manufacturing process of the box body 31 in the embodiment is simple, the opening, namely the socket of the quick connection plug 32, faces downwards, the connection of the bypass cable is facilitated, and meanwhile, the box body also has the effect of preventing rainwater from flowing into the box body 31 to a certain extent.
Referring to fig. 1 again, the invention further provides a preferred embodiment, the device for preventing misconnection of high-voltage bypass live working further comprises an arrester 4, the arrester 4 is mounted on the electric pole 100, and the arrester 4 is electrically connected with the other end of the circuit breaker 1. The lightning arrester 4 is generally connected between a cable and the ground, and has the main functions of reducing the amplitude of an invading flowing wave through the action of a parallel discharge gap or a nonlinear resistor, reducing the overvoltage value borne by protected equipment and further playing a role in protecting lines and equipment. The lightning arrester 4 can be used for protecting high voltage generated by lightning and also can be used for protecting high operating voltage, so that the safety of the lightning arrester is improved.
As a preferred embodiment, the box 31 in this embodiment is mounted on the electric pole 100 through a bracket, and is installed on the electric pole 100 as a pre-installed device, which facilitates the work. It will be appreciated that in practice, the housing 31 may also be provided on the floor or integrated into a nearby access cabinet, depending on the field conditions.
The invention provides a misconnection-preventing high-voltage bypass live-line work device, wherein a quick connecting plug 32 quickly connected into a box 3 can be used for connecting a bypass cable, so that a bypass line is quickly built. The quick connection plug 32 is located in the box 31 and is closed by the closing door 33, when the circuit breaker 1 is not disconnected, the lock 34 connected with the quick connection plug is electrified to lock the closing door 33, so that the closing door 33 cannot be opened, and at this time, the access operation cannot be carried out. The voltage transformer 2 is located between the circuit breaker 1 and the line of the lock 34, and functions as a voltage drop to convert the high voltage on the pole 100 to the low voltage required for the operation of the lock 34. When the circuit breaker 1 is turned off, the lock 34 is de-energized, and the closing door 33 can be easily opened at this time, allowing an operator to perform bypass building operation. After the bypass cable is built, the circuit breaker 1 is closed again to be put into use. Compared with the prior art, the quick connection plug 32 is switched on and off and foolproof by skillfully utilizing the circuit breaker 1 and the locking device 34, and when the circuit breaker 1 is not switched off, the socket of the quick connection plug 32 is completely sealed in the box body 31, so that any operation cannot be carried out, the phenomenon that the quick connection plug 32 is inserted in a live state is avoided, and safety accidents are avoided.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a prevent misconnection high pressure bypass live working device which characterized in that includes:
the circuit breaker is arranged on the electric pole, and one end of the circuit breaker is connected with a cable on the electric pole;
the voltage transformer is arranged on the electric pole, and the high-voltage end of the voltage transformer is electrically connected with the other end of the circuit breaker;
the quick access box comprises a box body, a quick connecting plug, a sealing door and a locking device, wherein the quick connecting plug is electrically connected to the other end of the circuit breaker and is arranged on the box body; the box body is provided with an opening, and the socket of the quick connection plug is positioned in the box body and faces the opening; the closing door is connected to the box body and used for closing the opening; the locking device is arranged on the box body, is electrically connected with the low-voltage end of the voltage transformer and is simultaneously connected with the closed door, and is used for locking the closed door in a closed state when the voltage transformer is electrified.
2. The device of claim 1, wherein the latch is a suction cup type electromagnet and is mounted in the box, a suction surface of the latch faces the opening, the door is hinged to the box, and when the door is closed, the suction surface of the latch abuts against the door.
3. The device for hot-line work of preventing misconnection of high voltage bypass according to claim 1, wherein the closing door is slidably connected to the box body, the sliding direction of the closing door is parallel to the plane of the closing door, and the sliding direction of the closing door is also parallel to the plane of the opening.
4. The device for preventing misconnection of high-voltage bypass live working according to claim 3, wherein the locking device is a traction electromagnet, the fixed end of the locking device is installed outside the box body, the telescopic iron core of the locking device is connected to the closing door, and the telescopic direction of the telescopic iron core of the locking device is parallel to the sliding direction of the closing door.
5. The live working device with the high voltage bypass for preventing misconnection according to claim 3, wherein the locker is an electric push rod, the fixed end of the locker is installed outside the box body, the telescopic rod of the locker is connected to the closing door, and the telescopic direction of the rod of the locker is parallel to the sliding direction of the closing door.
6. The device for hot-line work of preventing misconnection according to any one of claims 1 to 5, wherein the disconnecting switch is an isolating knife switch.
7. The device for hot-line work of preventing misconnection according to any one of claims 1 to 5, wherein the disconnecting switch is a vacuum circuit breaker.
8. The live working device with the high-voltage bypass capable of preventing misconnection according to any one of claims 1 to 5, wherein the box body is rectangular, the quick connection plug is inserted into the top surface of the box body, and the opening is formed in the bottom surface of the box body.
9. The device for preventing misconnection of the high-voltage bypass live working according to any one of claims 1 to 5, further comprising an arrester, wherein the arrester is mounted on an electric pole, and the arrester is electrically connected with the other end of the circuit breaker.
10. The device for hot-line work of the high-voltage bypass capable of preventing misconnection according to any one of claims 1 to 5, wherein the box body is mounted on an electric pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111282639.XA CN114243368A (en) | 2021-11-01 | 2021-11-01 | Misconnection-preventing high-voltage bypass live-line work device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111282639.XA CN114243368A (en) | 2021-11-01 | 2021-11-01 | Misconnection-preventing high-voltage bypass live-line work device |
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| Publication Number | Publication Date |
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| CN114243368A true CN114243368A (en) | 2022-03-25 |
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|---|---|---|---|
| CN202111282639.XA Pending CN114243368A (en) | 2021-11-01 | 2021-11-01 | Misconnection-preventing high-voltage bypass live-line work device |
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