CN112242615B - Non-power-outage-installation electricity testing grounding ring suitable for active power distribution network and operation method thereof - Google Patents
Non-power-outage-installation electricity testing grounding ring suitable for active power distribution network and operation method thereof Download PDFInfo
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- CN112242615B CN112242615B CN202010983803.9A CN202010983803A CN112242615B CN 112242615 B CN112242615 B CN 112242615B CN 202010983803 A CN202010983803 A CN 202010983803A CN 112242615 B CN112242615 B CN 112242615B
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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
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
- H01R11/12—End pieces terminating in an eye, hook, or fork
- H01R11/14—End pieces terminating in an eye, hook, or fork the hook being adapted for hanging on overhead or other suspended lines, e.g. hot line clamp
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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
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
- H01R4/2407—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation having saw-tooth projections
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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
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
- H01R4/646—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for cables or flexible cylindrical bodies
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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
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/027—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for connecting conductors by clips
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
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- Manufacturing & Machinery (AREA)
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Abstract
The invention discloses a non-power-outage installation electricity testing grounding ring suitable for an active power distribution network, which belongs to the technical field of grounding rings and comprises a C-shaped fixing frame, wherein the top of an inner cavity of the C-shaped fixing frame is provided with a row of fixing sharp teeth, the bottom of the C-shaped fixing frame is provided with a lifting rod in a through connection way through threads, the top end of the lifting rod is rotatably connected with a lifting block, the top end of the lifting block is provided with a row of lifting sharp teeth, and the bottom end of the lifting rod is provided with a grounding frame, when in use, the lifting rod is screwed on the grounding frame by using an insulating rod to drive the lifting block and the lifting sharp teeth to ascend to be matched with the fixing sharp teeth to penetrate through and clamp and fix insulating skins of cables from two sides or three points of the cables, so that the grounding frame is electrically communicated with cable cores, the operation can be easily completed by using a simple insulating rod, the connecting effect is stable, and the invention has the main advantages of improving the power supply reliability and the operation safety, the construction cost is reduced, and meanwhile, the working flexibility is greatly improved.
Description
Technical Field
The invention relates to the technical field of grounding rings, in particular to a non-power-outage-installation electricity testing grounding ring suitable for an active power distribution network and an operation method thereof.
Background
Distributed power access, a traditional power distribution network is changed from a passive power distribution network into an active power distribution network. According to the requirements of electric power safety work regulations, the construction operation of the power distribution network must implement safety technical measures such as power failure, electricity testing, grounding and the like. However, the coverage rate of the insulated wire of the current line is increased year by year, and the distributed power supply and the power distribution network side disconnection point are basically insulated. The design of the electricity testing grounding ring in the early stage is limited by the fact that the electricity testing grounding ring is not installed in time along with the operation of equipment or factors such as distributed power supply access on a user side are not considered at that time, and therefore safety measures such as electricity testing and ground connection cannot be achieved during field operation. Therefore, the conventional method is one of the following methods:
the first method is as follows: and internal connection points of distributed power users are disconnected in the case of power failure, and the distribution network side circuit is provided with an electricity testing grounding ring in the power failure mode.
The second method comprises the following steps: live working installation electricity testing grounding ring is carried out by using a non-power-off ascending vehicle and the like.
The power failure range and the power failure time are expanded by adopting the first mode; the second method has the disadvantages of poor operation safety performance, increased operation difficulty and the like.
Based on the technical scheme, the invention designs the non-power-outage installation electricity testing grounding ring suitable for the active power distribution network so as to solve the problems.
Disclosure of Invention
The invention aims to provide a non-power-outage installation electricity testing grounding ring suitable for an active power distribution network, and the technical problem is solved.
In order to realize the purpose, the invention provides the following technical scheme: the utility model provides an installation of not having a power failure tests electric ground ring suitable for active distribution network, includes the fixed frame of C shape, the inner chamber top of the fixed frame of C shape is provided with one row of fixed sharp tooth, the bottom of the fixed frame of C shape is provided with the lifter through screw thread through connection, the top of lifter rotates and is connected with the elevator, the top of elevator is provided with one row of going up and down sharp tooth, the bottom of lifter is provided with the ground frame.
Preferably, the fixed sharp teeth and the lifting sharp teeth are distributed in an equidistant array along the front-back direction of the C-shaped fixed frame respectively.
Preferably, the top end of the lifting rod is provided with a T-shaped step rod, and the bottom of the lifting block is provided with a T-shaped step groove matched with the T-shaped step rod.
Preferably, the outer wall of the lifting block is provided with external threads, and the bottom of the C-shaped fixing frame is provided with an internal thread hole.
Preferably, the grounding frame is of a square frame structure, and the bottom end of the lifting rod is hinged and connected with the top of the grounding frame.
Preferably, the inner chamber top of the fixed frame of C-shaped is right angle V-shaped face structure, the both sides of right angle V-shaped face structure are all held and are provided with the U-shaped slider, fixed sharp tooth set up in U-shaped slider bottom, the leading flank of right angle V-shaped face structure has seted up spacing spout along the inclined plane direction, the preceding lateral wall spiro union of U-shaped slider has set screw, set screw's thread end is located in the spacing spout.
Preferably, one side of the limiting sliding groove is provided with position scales along the length direction of the sliding groove.
The utility model provides an operation method of not having a power failure and installing electricity inspection ground ring suitable for active distribution network which characterized in that: the method comprises the following steps:
1) an operator climbs the electric pole and installs the device at a proper position of a lead on the premise of ensuring the safety distance of more than 0.7m of a 10kV electrified part;
2) according to the outer diameter of the cable, the positions of the U-shaped sliding blocks on the two sides are pulled and adjusted, and the positioning screws are locked to fix the positions of the U-shaped sliding blocks;
3) the cable is buckled into an inner cavity of the C-shaped fixing frame, a proper angle is adjusted, the insulating rod is used for rotating the grounding frame to rotate the lifting rod to drive the lifting block and the lifting sharp teeth to ascend, in addition, the lifting sharp teeth are matched with the fixed sharp teeth on the left side and the right side of the V-shaped surface structure, and the insulating skin of the cable is penetrated, clamped and fixed from the left side, the right side and the bottom above the cable, so that the grounding frame can be electrically communicated with the cable core wire;
4) using a rotation torque force greater than 26Nm, when the grounding ring cannot be screwed down, indicating that the grounding ring is rotated to the position;
5) and (5) discharging the rod by personnel and finishing the installation.
Preferably, in step 3), the fixing sharp teeth on the left and right sides above the cable and the lifting sharp teeth at the bottom of the cable are located at the vertex positions of the same equilateral triangle
Compared with the prior art, the invention has the beneficial effects that:
the invention is suitable for the non-power-outage installation electricity-testing grounding ring of an active power distribution network, and mainly comprises a C-shaped fixing frame, a lifting rod, a lifting block and a grounding frame, wherein the top of an inner cavity of the C-shaped fixing frame and the top of the lifting block are respectively provided with fixed sharp teeth and lifting sharp teeth which are distributed in an equidistant array mode.
Furthermore, the invention is suitable for the non-power-outage installation electricity testing grounding ring of an active power distribution network, the fixed sharp teeth are designed into two groups which can be adjusted left and right, and form three-point type occlusion contact with the bottom lifting sharp teeth, natural centering can be realized, excessive manual supporting and adjusting operation is not needed, after clamping, effective stress points are increased, the tearing force borne by each stress point is reduced, the possibility that the cable is torn and deformed or loosens is effectively reduced, and the operability and the safety stability of the device are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a lower portion of the present invention;
FIG. 3 is a top view of a portion of the present invention;
FIG. 4 is a schematic side view of the present invention;
FIG. 5 is a schematic view of a three-point fixed type overall structure of the present invention;
fig. 6 is a schematic view of the structure in the direction of a-a in fig. 5.
In the drawings, the components represented by the respective reference numerals are listed below:
the device comprises a 1-C-shaped fixing frame, 2-fixing sharp teeth, 3-lifting rods, 4-lifting blocks, 41-T-shaped step grooves, 5-lifting sharp teeth, 6-grounding frames, 7-T-shaped step rods, 8-external threads, 9-internal thread holes, 10-right-angle V-shaped surface structures, 11-U-shaped sliding blocks, 12-limiting sliding grooves, 13-positioning screws and 14-position scales.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1-4, the present invention provides a technical solution: an electricity testing grounding ring without power outage for installation of an active power distribution network comprises a C-shaped fixing frame 1, one side of the C-shaped fixing frame 1 is provided with an opening structure for placing cables, the C-shaped fixing frame 1 is provided with a certain width along the front-back direction to ensure enough distribution quantity of fixed sharp teeth 2 and lifting sharp teeth 5 and contact length with the cables, so that connection stability is ensured, the top of an inner cavity of the C-shaped fixing frame 1 is provided with a row of fixed sharp teeth 2, the fixed sharp teeth 2 are uniformly distributed in an equidistant array along the front-back direction of the C-shaped fixing frame 1 respectively, the bottom of the C-shaped fixing frame 1 is provided with a lifting rod 3 through threaded through connection, the outer wall of the lifting block 4 is provided with an external thread 8, the bottom of the C-shaped fixing frame 1 is provided with an internal thread hole 9 for realizing threaded connection, the top end of the lifting rod 3 is rotatably connected with a lifting block 4, and the top end of the lifting rod 3 is provided with a T-shaped step rod 7, the T shape step groove 41 with the 7 complex of T shape step pole is seted up to the bottom of lifter block 4, realize rotating the connection, the top of lifter block 4 is provided with one row of sharp tooth 5 that goes up and down, sharp tooth 5 that goes up and down is equallyd divide and is do not followed the equidistance array distribution of the fixed frame 1 of C shape fore-and-aft direction, the bottom of lifter 3 is provided with ground connection frame 6, ground connection frame 6 is the square frame structure, can be used to pass the insulating rod, conveniently rotate lifter 3, the bottom of lifter 3 is connected with ground connection frame 6's top hinge, certain swing degree of freedom has when ground connection wire is connected to ground connection frame 6, eliminate the influence of wire shake to the connection structure steadiness.
Example 2:
referring to fig. 5-6, further, the top of the inner cavity of the C-shaped fixing frame 1 is a right-angled V-shaped surface structure 10, two sides of the right-angled V-shaped surface structure 10 are respectively clamped with a U-shaped sliding block 11, the fixing sharp teeth 2 are arranged at the bottom of the U-shaped sliding block 11, a limiting sliding groove 12 is arranged on the front side surface of the right-angled V-shaped surface structure 10 along the direction of an inclined plane, the limiting sliding groove 12 is a rectangular groove which is not through from front to back, a positioning screw 13 is screwed on the front side wall of the U-shaped sliding block 11, the threaded end of the positioning screw 13 is located in the limiting sliding groove 12, when the positioning screw 13 is screwed, the rear side wall of the U-shaped sliding block 11 is in full contact with the C-shaped fixing frame 1 to ensure a conductive contact surface, one side of the limiting sliding groove (12) is provided with a position scale (14) along the length direction of the sliding groove, for cables of common specifications, the position of the applicable U-shaped sliding block 11 can be directly marked on the position scale (14), and can be conveniently and quickly adjusted in place accurately, the operation difficulty is reduced, and the construction operation time is saved;
considering that the size and specification of the cable diameter of the active power distribution network cable may not be consistent with the radian of the inner cavity of the C-shaped fixed frame 1, when the cable diameter is smaller than the radian of the inner cavity of the C-shaped fixed frame 1, on one hand, a position guide structure is lacked before the occlusion fixing operation, and the cable is inconvenient to be centered and adjusted, and on the other hand, after the occlusion fixing, when the grounding wire is severely shaken, the number of two points of occlusion contact and effective stress points is small, the bearing tearing force is large, and the cable is easier to tear, deform and even loosen;
therefore, the two-point contact is further improved into three-point occlusion contact, the fixed sharp teeth 2 on the two sides of the upper side can be movably adjusted along with the U-shaped sliding block 11, so that cables with different wire diameters can be fixedly occluded, the fixed sharp teeth 2 on the left side and the right side of the upper side of the cable and the lifting sharp teeth 5 at the bottom of the cable are located at the vertex positions of the same equilateral triangle, and therefore before occlusion clamping, the cables are simultaneously abutted against the fixed sharp teeth 2 on the two sides, natural centering is achieved, excessive manual supporting and adjusting operation is not needed, after clamping, effective stress points are increased, the bearing and tearing force of each stress point is reduced, the possibility that the cables are torn and deformed or loose and take off is effectively reduced, and the operability and the safety stability of the device are greatly improved.
Working principle example of example 2:
1) an operator climbs the electric pole and installs the device at a proper position of a lead on the premise of ensuring the safety distance of more than 0.7m of a 10kV electrified part;
2) according to the outer diameter of the cable, the positions of the U-shaped sliding blocks 11 on the two sides are pulled and adjusted, and the position of the U-shaped sliding block 11 is fixed by locking and positioning screws 13;
3) the cable is buckled into an inner cavity of a C-shaped fixed frame 1, a proper angle is adjusted, an insulating rod is used for screwing a grounding frame 6 to rotate a lifting rod 3 to drive a lifting block 4 and lifting sharp teeth 5 to ascend, in addition, the lifting sharp teeth 5 are matched with fixed sharp teeth 2 on the left side and the right side of a V-shaped surface structure 10, and insulating skins of the cable are penetrated through, clamped and fixed from the left side and the right side above the cable a and the bottom of the cable a, so that the grounding frame 6 can be electrically communicated with cable core wires; wherein, the fixed sharp teeth 2 at the left side and the right side above the cable a and the lifting sharp teeth 5 at the bottom of the cable a are positioned at the vertex position of the same equilateral triangle.
4) Using a rotational torque greater than 26Nm, indicating a rotation into position when the ground ring cannot be tightened;
5) the personnel lower the pole and finish the installation;
in the description of the invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the invention.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the invention is understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides an installation of not cutting off power supply tests electric ground ring suitable for active power distribution network, its characterized in that: the C-shaped fixing frame comprises a C-shaped fixing frame (1), wherein a row of fixing sharp teeth (2) are arranged at the top of an inner cavity of the C-shaped fixing frame (1), a lifting rod (3) is arranged at the bottom of the C-shaped fixing frame (1) in a through connection mode through threads, a lifting block (4) is rotatably connected to the top end of the lifting rod (3), a row of lifting sharp teeth (5) are arranged at the top of the lifting block (4), and a grounding frame (6) is arranged at the bottom end of the lifting rod (3); the inner chamber top of the fixed frame of C shape (1) is right angle V-shaped face structure (10), the both sides of right angle V-shaped face structure (10) all block and hold and be provided with U-shaped slider (11), fixed sharp tooth (2) set up in U-shaped slider (11) bottom, spacing spout (12) have been seted up along the inclined plane direction to the leading flank of right angle V-shaped face structure (10), the preceding lateral wall spiro union of U-shaped slider (11) has set screw (13), the thread end of set screw (13) is located in spacing spout (12).
2. The non-power-outage installation electricity testing grounding ring suitable for the active power distribution network according to claim 1, characterized in that: and one side of the limiting sliding groove (12) is provided with position scales (14) along the length direction of the sliding groove.
3. The operation method of installing the electricity testing grounding ring without power outage, which is suitable for the active power distribution network, according to the claim 1 or 2, is characterized in that: the method comprises the following steps:
1) an operator climbs the electric pole and installs the device at a proper position of a lead on the premise of ensuring the safety distance of more than 0.7m of a 10kV electrified part;
2) according to the outer diameter of the cable, the positions of the U-shaped sliding blocks (11) on the two sides are pulled and adjusted, and the position of the U-shaped sliding block (11) is fixed by locking a positioning screw (13);
3) the cable is buckled into an inner cavity of a C-shaped fixed frame (1), a proper angle is adjusted, an insulating rod is used for screwing a grounding frame (6) to rotate a lifting rod (3) to drive a lifting block (4) and lifting sharp teeth (5) to ascend, the lifting sharp teeth (5) are matched with fixed sharp teeth (2) on the left side and the right side of a V-shaped surface structure (10), insulating skins of the cable are penetrated through and clamped and fixed from the left side and the right side above the cable (a), and the grounding frame (6) can be electrically communicated with cable core wires;
4) using a rotation torque force greater than 26Nm, when the grounding ring cannot be screwed down, indicating that the grounding ring is rotated to the position;
5) and (5) discharging the rod by personnel and finishing the installation.
4. The operation method of installing the electricity testing grounding ring without power outage applicable to the active power distribution network, according to claim 3, is characterized in that: in the step 3), the fixed sharp teeth (2) on the left side and the right side above the cable (a) and the lifting sharp teeth (5) at the bottom of the cable (a) are positioned at the vertex of the same equilateral triangle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010983803.9A CN112242615B (en) | 2020-09-17 | 2020-09-17 | Non-power-outage-installation electricity testing grounding ring suitable for active power distribution network and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010983803.9A CN112242615B (en) | 2020-09-17 | 2020-09-17 | Non-power-outage-installation electricity testing grounding ring suitable for active power distribution network and operation method thereof |
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| CN112242615A CN112242615A (en) | 2021-01-19 |
| CN112242615B true CN112242615B (en) | 2021-09-28 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI96726C (en) * | 1993-12-27 | 1996-08-12 | Sekko Ab Oy | Rail connection for connecting a ground cable to a fuse strip |
| CN2833905Y (en) * | 2005-10-26 | 2006-11-01 | 张永 | Medium-voltage penetrating insulated wire with electric flashing device |
| CN100456563C (en) * | 2006-08-25 | 2009-01-28 | 江苏省电力公司常州供电公司 | Penetrating cable clamp |
| CN203398355U (en) * | 2013-08-28 | 2014-01-15 | 范正勇 | Portable puncture-type short circuit grounding wire |
| CN104037515A (en) * | 2014-06-19 | 2014-09-10 | 国网四川省电力公司成都市新都供电分公司 | Ground wire |
| CN104134878A (en) * | 2014-08-13 | 2014-11-05 | 国家电网公司 | Novel electrified early-warning ground wire |
| CN106025609B (en) * | 2016-05-27 | 2018-03-30 | 龚卫兵 | Anticreep insulation puncture line clamping |
| CN206850052U (en) * | 2017-05-10 | 2018-01-05 | 广州番禺电缆集团有限公司 | One kind exempts from peeling type electric wire ground connection switching device |
| CN212991371U (en) * | 2020-09-17 | 2021-04-16 | 国网福建省电力有限公司泉州供电公司 | Non-power-outage-free installation electricity testing grounding ring suitable for active power distribution network |
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