Insulation protection tool and method for live-line assembly and disassembly of electric energy meter

Abstract

The invention relates to the technical field of electric power safety operation, in particular to an insulation protection tool and method for assembling and disassembling an electric energy meter in an electrified mode. The insulation protection tool comprises cap barrels used for wrapping bare connector lugs, cap heads used for blocking the top ends of the cap barrels, a connecting rope used for connecting the two cap barrels in series, and marks used as identification information to mark the cap barrels. According to the insulation protection method, the insulation protection tool is arranged on the detached and stripped bare connector lug in a sleeving mode, then the electric energy meter is detached and replaced, the insulation protection tool is detached from the bare connector lug, and the connector lug is connected with a new electric energy meter. According to the utility model, a bare wiring head is effectively wrapped and isolated, an operator is prevented from electric shock, personal safety is guaranteed, independent insulation and grouped insulation protection are realized, contact or accidental collision of different wires is avoided, risks of short circuit, sparks and the like are reduced, and the device is suitable for three-phase three-wire, three-phase four-wire or three-phase five-wire electric energy meters, meets different field requirements and is high in universality.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power safety operations, and in particular to an insulation protection tool and method for live installation and removal of electric energy meters. Background Art

[0002] The installation and removal of electric energy meters is the core business of power supply stations and is carried out every day. Currently, 60% of the three-phase four-wire electric energy meters connected via transformers are not equipped with junction boxes. The current replacement of such electric energy meters has the following defects and dangers: First, installation and disassembly during power outages are time-consuming and labor-intensive, and affect power supply reliability indicators, giving customers a negative perception.

[0003] The second is live installation and removal. When removing the electricity meter, the current transformer must be short-circuited, and then each phase line and voltage line must be wrapped with insulating tape. When installing the electricity meter, the insulating tape must be removed from the phase line and voltage line one by one before connecting them to the electricity meter terminal, which increases the installation and removal time.

[0004] The third is live installation and disassembly. In order to increase the speed of installation and disassembly, some workers take risks and operate without power outages, which can easily cause a short circuit between phases of the electricity meter, resulting in the meter burning out and burns to the workers.

[0005] Fourth, the above three installation and disassembly methods are prone to cause mixed line problems, affecting the accurate operation of the electricity meter. Summary of the Invention

[0006] In order to solve the problem of electric energy meter, the present invention provides an insulation protection tool and method for installing and removing the electric energy meter under power.

[0007] On the one hand, the present invention provides an insulation protection tool for installing and removing an electric energy meter under power, which adopts the following technical solution: An insulation protection tool for installing and removing an electric energy meter under power, comprising: Cap barrel, used to wrap bare wire ends; The cap head is arranged at the top of the cap barrel and is used to seal the top of the cap barrel; A connecting rope, with two ends connected to different hat barrels, used to connect the two hat barrels in series; The logo is printed on the outer surface of the hat barrel to mark the hat barrel as identification information.

[0008] By using a cap barrel and cap head made of insulating material, the exposed terminal ends can be effectively wrapped and sealed, preventing operators from electric shock accidents caused by accidental contact with live parts during live installation and disassembly, thereby improving operational safety. The cap barrel has a simple structure and is easy to install and disassemble quickly, which can significantly simplify the live operation process, save labor hours, and improve work efficiency. The connecting rope design enables multiple cap barrels to be carried and managed in groups to avoid loss or omission, which helps to standardize operations on site. The outer surface of the cap barrel is printed with clear markings, which can be used to display circuit numbers, phases and other identification information, making it easy for operators to accurately distinguish different terminal ends, prevent line failures caused by misconnection or misdisassembly, and improve the accuracy and reliability of operations. The material has good insulation performance and can be used repeatedly. It is suitable for different models of electricity meters and various power operation scenarios, reducing consumable costs.

[0009] Furthermore, the cap barrel is made of elastic material, the center hole of the cap barrel is a stepped blind hole, and the shape and size of the blind hole are customized according to the shape and size of the bare wire head.

[0010] The cap barrel is made of elastic material and can undergo elastic deformation according to the actual size and shape of the terminal head, so that the cap barrel can tightly wrap bare terminal heads of different specifications, improve the sealing and fit, further block the contact between the outside world and the live body, and provide better insulation protection, effectively preventing electric shock accidents. The stepped blind hole design can adapt to terminal heads of different diameters or multiple sizes, so that one cap barrel can be suitable for terminal heads of multiple specifications, reducing the number of tools and facilitating on-site management and carrying. The shape and size of the blind hole are customized according to the actual bare terminal head, which can accurately match the target part, avoid loosening, falling off or protecting dead corners due to size mismatch, and improve operation safety and reliability. The elastic material and customized structure make the cap barrel more convenient and labor-saving during installation and disassembly, without the need for too many auxiliary tools, thereby improving work efficiency.

[0011] Furthermore, the cap head includes a dome shape and a pointed top shape.

[0012] The shape of the cap head is used to distinguish the type of insulation wrapped conductor. Different cap head shapes can adapt to the complex equipment layout and space requirements of the power site. Users can flexibly select the appropriate cap head type according to the actual working environment to improve the applicability and ease of operation of the tool.

[0013] Furthermore, the connecting rope connects the three hat tubes in series in sequence, wherein the shape of the hat head of the middle hat tube is different from the shapes of the hat heads of the hat tubes at both ends.

[0014] Furthermore, the connecting rope connects two or three hat tubes in series, and the hat heads of all the hat tubes have the same shape.

[0015] Furthermore, the colors of the hat tube and the hat head include at least yellow, green, red, and black.

[0016] Through the use of different colored cap barrels and cap heads, terminal blocks of different types, uses or specifications can be clearly distinguished, which helps on-site workers quickly identify and select appropriate insulation protection tools, reduce misoperation, and improve work efficiency and safety.

[0017] Furthermore, the logo is drawn or engraved on the outer surface of the hat barrel.

[0018] By drawing or engraving the logo directly on the outer surface of the hat barrel, the product model, purpose, specifications or safety warning information can be clearly seen at a glance. Workers can quickly and accurately identify the key information of the product without having to disassemble or flip tools on site, avoiding wrong picking or misusing, and improving work efficiency. The engraving method is more wear-resistant and not easy to fall off than stickers, and can remain clearly visible for a long time. It can adapt to complex and harsh usage environments such as power operations, ensuring that the information is durable and readable.

[0019] On the one hand, the present invention provides an insulation protection method for live installation and removal of an electric energy meter, which adopts the following technical solution: A method for insulation protection during live installation and removal of an electric energy meter comprises using the above-mentioned insulation protection tool for live installation and removal of an electric energy meter, putting the insulation protection tool on the removed and stripped bare wire head, then removing and replacing the electric energy meter, removing the insulation protection tool from the bare wire head, and connecting the wire head to the new electric energy meter.

[0020] During the live installation and removal of the electricity meter, the insulating protection tools are promptly and effectively put on the exposed terminal heads, which can prevent the operator from accidentally touching the live parts, reduce the risk of electric shock, play a good insulating protection role, and ensure personal safety. The bare terminal heads are temporarily covered by the insulating protection tools, which can effectively prevent accidental contact between the wires, avoid safety accidents such as short circuits, sparks, and burning of electricity meters, and protect the stable operation of on-site equipment and power systems. This method is simple to operate and can quickly complete the temporary insulation protection of the terminal heads without the need for complex tools and unnecessary steps. It shortens the operation time of installing and removing the electricity meter, improves work efficiency, and is suitable for the rapid replacement needs of power operation and maintenance sites.

[0021] Furthermore, when using the insulating protection tool, different wire terminals are insulated and sleeved according to the markings on the cap barrel and the cap head, and the wire terminals of the same group are insulated and sleeved using the cap barrels connected in series.

[0022] By using the markings on the cap barrel and cap head to perform corresponding insulation sleeves on different wire terminals, it can be ensured that each wire terminal receives correct and exclusive insulation protection, avoiding incorrect or missed sleeves, enhancing the accuracy of protection, and facilitating the rapid and accurate completion of insulation operations on site. For wire terminals in the same group, cap barrels connected in series are used for insulation sleeves, so that the wires in the same group can be protected as a whole, facilitating group management and operation, thus reducing the number of individual operations, improving efficiency, and facilitating subsequent inspection and maintenance.

[0023] Furthermore, it is used for live installation, disassembly and replacement of three-phase three-wire, three-phase four-wire or three-phase five-wire electric energy meters.

[0024] In summary, the present invention has the following beneficial technical effects: 1. Effectively wrap and isolate live bare wire ends to prevent operators from electric shock and ensure personal safety.

[0025] 2. Independent insulation and group insulation protection prevent different wires from contacting or accidentally colliding, reducing the risks of short circuits, sparks, etc.

[0026] 3. Applicable to three-phase three-wire, three-phase four-wire or three-phase five-wire electricity meters, meeting different on-site requirements and having strong versatility.

[0027] 4. Elastic material and customized blind hole structure make installation quick and disassembly easy, saving operation time.

[0028] 5. By connecting the caps with ropes, the overall insulation and unified management of the same group of terminals can be achieved, simplifying the process.

[0029] 6. The markings and multiple colors on the cap barrel and cap head make it easy to identify and correspond to different phase lines or functional wires to prevent misinstallation.

[0030] 7. The stepped blind hole is customized according to the size of the terminal head, suitable for wires of various specifications, fits tightly and improves the insulation effect.

[0031] 8. Cap designs of different colors and shapes, combined with logos, facilitate standardized on-site operations and subsequent inspections.

[0032] 9. Made of high-quality elastic insulating material, it is wear-resistant and high-voltage-resistant. The tool can be used multiple times to reduce maintenance costs.

[0033] 10. Standardize the live assembly and disassembly operation process, reduce human errors, improve the safety, standardization and management level of the overall operation, and comply with the safety management requirements of the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a yellow insulating protective tool according to a first embodiment of the present invention; Figure 2 This is a schematic structural diagram of a red insulating protective tool according to the first embodiment of the present invention; Figure 3 This is a schematic structural diagram of a green insulating protective tool according to a first embodiment of the present invention; Figure 4 This is a schematic structural diagram of a black insulating protective tool according to a second embodiment of the present invention; Figure 5 This is a schematic structural diagram of an orange insulating protective tool according to a second embodiment of the present invention; Figure 6 This is a schematic diagram of the installation and use of the insulating protection tool of the present invention.

[0035] Description of reference numerals: 1. Hat box, 2. Hat head, 3. String, 4. Logo. DETAILED DESCRIPTION

[0036] The following will be combined with the Figures 1-6 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] Three-phase three-wire electricity meters are mainly used to measure three-phase three-wire circuits, mostly in high-voltage or power applications. The wiring method is two-phase A and C phase lines + a common line (often the B phase or neutral line is omitted). The structure is simple and suitable for balanced loads, but it cannot directly measure the power consumption of single-phase loads.

[0039] Three-phase four-wire electricity meters are most commonly used in industrial, commercial and some residential power distribution systems. They can measure both three-phase loads and single-phase loads. The wiring method is A, B, C three-phase phase lines + N neutral line. They have strong adaptability and support unbalanced loads, but the wiring is slightly more complicated than three-phase three-wire.

[0040] The three-phase five-wire electricity meter is suitable for precise measurement or occasions where the grounding protection line needs to be detected separately. The wiring method is A, B, C three-phase phase line + N neutral line + PE protective ground line. The addition of the protective ground improves safety and makes the measurement more accurate. However, it has the most wiring, and the lines must be strictly distinguished during installation.

[0041] Detailed steps for installation and replacement of electric energy meters: Preliminary preparation: Tools include screwdrivers, insulating gloves, insulating protective caps and barrels, multimeters, label pens, etc. Safety measures include wearing insulating gloves, preparing insulating mats, posting warning signs, and requesting a power outage when necessary (if live work is not possible); Check the electricity meter model and wiring diagram to ensure that the new meter specifications and wiring methods are consistent with the site.

[0042] Dismantle the old energy meter: Confirm the electricity meter number and user information and keep records; Use a multimeter to check whether there is power and confirm the required circuit status; Before removing the energy meter, remove the incoming wires one by one and promptly wrap the exposed wire ends with insulation to prevent short circuits and electric shocks. Loosen the screws and remove the old energy meter body; Check the wiring terminals for any abnormalities such as burnt, loose, or discoloration, and handle them if necessary.

[0043] Installing a new energy meter: Compare the nameplate information, wiring requirements, and terminal markings of the new electricity meter to confirm that they are correct; Connect the three-phase wires A, B, and C (or L1, L2, and L3) to the correct terminals in sequence according to the terminal markings on the meter. If it is a three-phase four-wire / five-wire meter, connect the N (neutral wire) and PE (ground wire) separately. Remove the insulating caps one by one, connect the new terminals, and tighten the screws to ensure a firm crimping. In case of transformer measurement, the secondary circuit of the current transformer must be correctly connected; Check the wiring sequence and tightening conditions again to ensure they are correct; After installation, turn on the power and use a multimeter or test pen to check whether there is electricity in the terminals and whether the energy meter displays normally; If necessary, perform phase sequence detection and functional test to ensure the accuracy of the electricity meter.

[0044] Closing and Recording: Fill out the installation or replacement record sheet, indicating the time, meter number, operator, on-site conditions, etc.; Clean up the site and recycle insulation protection tools; Notify the user and briefly explain the replacement results, and restore normal power supply; If there are any abnormalities, report and handle them in a timely manner.

[0045] The embodiment of the present invention discloses an insulation protection tool and method for installing and removing an electric energy meter under power.

[0046] An insulating protection tool for installing and removing electric energy meters under power, Figure 1-Figure 5 ,include: Cap barrel 1, used for wrapping bare wire ends; The cap head 2 is provided at the top of the cap tube 1 and is used to seal the top of the cap tube 1; A connecting rope 3, with two ends connected to different hat barrels 1, for connecting the two hat barrels 1 in series; The logo 4 is printed on the outer surface of the hat barrel 1 and marks the hat barrel 1 as identification information.

[0047] The cap barrel 1 is made of elastic material, and the center hole of the cap barrel 1 is a stepped blind hole, and the shape and size of the blind hole are customized according to the shape and size of the bare wire head.

[0048] The cap head 2 includes a dome shape and a pointed top shape.

[0049] The colors of the hat tube 1 and the hat head 2 include at least yellow, green, red, and black.

[0050] The logo 4 is drawn or engraved on the outer surface of the hat tube 1 .

[0051] The cap barrel 1 and the cap head 2 are made of highly elastic insulating silicone rubber or thermoplastic elastomer, which have excellent electrical insulation performance, wear resistance, aging resistance and high and low temperature resistance. The material should be non-toxic and odorless and comply with RoHS environmental protection standards. The color is mixed with polymer colorants to ensure that it will not fade or discolor after long-term use.

[0052] The connecting rope 3 is made of high-strength insulating fiber rope or polyester braided rope, and the surface is coated with an insulating layer made of the same material as the hat tube 1 and the hat head 2 to ensure mechanical strength and flexibility.

[0053] The logo 4 is drawn with wear-resistant and anti-shedding ink, or a permanent logo is formed on the surface of the cap tube 1 using laser engraving technology.

[0054] The cap barrel 1 and the cap head 2 are molded by injection molding or compression molding vulcanization molding technology. The overall structure is processed according to the design drawings. The stepped blind hole is formed at one time in the mold stage to ensure that the inner hole size matches the height and diameter of the terminal head. The cap head 2 can be integrally molded with the cap barrel 1, or fixed by high-strength snap / hot melt methods.

[0055] The connecting rope 3 is integrally formed with the cap tube 1 and the cap head 2 by injection molding, and is filled with high-strength insulating fiber rope or polyester braided rope before injection molding.

[0056] The identification 4 is laser engraved or screen printed to mark the phase line number, color code, purpose and other information on the surface of the hat tube 1 to ensure clear identification.

[0057] The outer diameter of the cap barrel 1 is 15-25mm (customized according to the specifications of common bare wire terminals, and other sizes can also be customized on demand), the inner diameter (stepped blind hole) is 8-12mm at the small end and 12-18mm at the large end, the hole depth is 20-35mm, and the wall thickness is 2-3mm to ensure sufficient mechanical strength and insulation thickness.

[0058] The diameter of the cap head 2 is consistent with the outer diameter of the cap barrel 1, the thickness is 4 to 6 mm, the shape is dome or pointed, and there is no hole at the top to enhance the sealing performance.

[0059] The connecting rope 3 has a diameter of 2 to 3 mm and a length of 30 to 50 mm, and has a smooth and soft surface and excellent insulation performance.

[0060] The height of the logo 4 is 2 to 4 mm, the width is suitable for the surface of the hat barrel 1, and the color forms a clear contrast with the hat barrel body, which is easy to identify.

[0061] A method for insulation protection during live installation and removal of electric energy meters, referring to Figure 6 , use the above-mentioned insulation protection tool for installing and removing the electric energy meter under power, put the insulation protection tool on the bare wire head that has been removed and peeled off, then remove and replace the electric energy meter, remove the insulation protection tool from the bare wire head, and connect the wire head to the new electric energy meter.

[0062] When using the insulating protection tool, different wire terminals are insulated and sleeved according to the marks 4 on the cap barrel 1 and the cap head 2, and the wire terminals of the same group are insulated and sleeved using the cap barrels 1 connected in series.

[0063] Used for live installation, disassembly and replacement of three-phase three-wire, three-phase four-wire or three-phase five-wire electricity meters.

[0064] According to the number of terminal blocks, wire diameter and phase of the on-site electricity meter, select the cap barrel 1 and cap head 2 of the corresponding color and size. When disassembling the electricity meter, insert the stripped bare terminal blocks into the corresponding cap barrel 1 one by one, so that the terminal blocks are completely wrapped by the stepped blind hole. The cap head 2 blocks the top of the cap barrel 1. The terminal blocks of the same group of wires can be connected in series with the cap barrel 1 using a connecting rope 3 for unified management to prevent loss or misinstallation. The phase or function of each wire can be quickly identified through the mark 4 on the outer surface of the cap barrel 1. After completing the protection, the electricity meter can be safely disassembled and replaced under power.

[0065] After the electricity meter is replaced, remove the cap tube 1 in turn, connect the wire connector to the new meter terminal, tighten the terminal screws to ensure good contact, count and recycle all protective tools, and tidy up the site to ensure that nothing is left behind.

[0066] Check and prepare insulating protection tools (including cap tubes 1, cap heads 2, connecting ropes 3 and clear markings 4 of different specifications and colors), prepare common electrical tools such as insulating gloves, insulating shoes, screwdrivers, etc., check the integrity of the protective tools to ensure there are no cracks or damage, confirm the type of electricity meter that needs to be replaced (three-phase three-wire, three-phase four-wire or three-phase five-wire), check the electricity meter wiring diagram, and verify the distribution and markings of each phase line, neutral line and ground line.

[0067] On the premise of ensuring that personal protective measures are in place, use a screwdriver to loosen the screws of the electricity meter terminals in turn to disconnect each wire connector from the electricity meter. When disassembling, only remove one terminal and then immediately perform insulation protection to prevent the exposed wire from being exposed to electricity. Select a cap barrel 1 that matches the wire connector (the color, size, and marking are consistent with the wire), insert the bare terminal into the stepped blind hole of the cap barrel 1 so that it is completely wrapped by the cap barrel, select a cap head 2 of a suitable shape (dome or pointed top), seal the top of the cap barrel 1, and ensure that no metal is exposed. Use the markings 4 on the cap barrel 1 and the cap head 2 to confirm the correspondence with the wire number and phase to avoid confusion. For multiple terminals in the same group (such as the same phase line or the same functional line), use a connecting rope 3 to connect the corresponding cap barrels 1 to facilitate unified management and prevent tool loss, and complete the insulation protection of all terminal terminals in sequence.

[0068] According to the original identification and sequence, remove the cap barrel 1 and cap head 2 from each wire connector in turn. Prevent the cap barrel from slipping or touching other live parts during removal. Connect each wire connector to the corresponding terminal of the new electricity meter according to the original wiring diagram or terminal number, and tighten the terminal screws to confirm that all connections are firm, the wires are not loose, and there is no exposed metal. Check the correctness and tightness of the wiring to ensure that the electricity meter is installed in compliance with regulations and safety, restore power to the electricity meter, and verify whether the electricity meter is working normally. Put insulation protection tools on all removed bare wire heads in sequence, confirm that each wire has been properly insulated and isolated, and inspect the seal and identification of each cap barrel 1 again to avoid missing or wrong sets. When all wire heads have been insulated, safely remove the old electricity meter body.

[0069] When working with power, personal protective equipment must be worn throughout the process and safety operating procedures must be followed.

[0070] The insulation performance of insulating protection tools must be tested regularly, and it is strictly forbidden to use aging or damaged protective tools.

[0071] The color and marking of the cap barrel 1 of each phase line, neutral line and ground line should be consistent with the on-site cable marking to prevent wiring errors.

[0072] It is strictly forbidden for multiple people to operate at the same time during the operation to prevent accidental contact with live parts.

[0073] Example 1: Reference Figure 1-Figure 3The connecting rope 3 connects the three hat tubes 1 in series, wherein the shape of the hat head 2 of the middle hat tube 1 is different from the shape of the hat heads 2 of the hat tubes 1 at both ends.

[0074] Hat head 2 shape: The cap head 2 of the middle cap barrel 1 adopts a special geometry (such as a dome + platform or a clear protrusion) to distinguish it from the cap heads at both ends at a glance. The voltage identification content is on the top or side of the middle cap head 2, with obvious "voltage", "V" or "U" printed on it, indicating that the cap barrel is used for the voltage sampling line or belongs to the voltage circuit.

[0075] The arrow indicates the direction of current or voltage flow, or indicates the physical position of the terminal in the three-phase circuit (such as phase A on the left and phase C on the right), clearly indicating that the terminal protected by this cap is the voltage sampling line connector in the three-phase electricity meter, making it easier for operators to identify and distinguish and prevent misoperation.

[0076] Example 2: Reference Figure 4 and Figure 5 The connecting rope 3 connects two or three hat tubes 1 in series, and the hat heads 2 of all the hat tubes 1 have the same shape.

[0077] It is suitable for the three phase lines of three-phase three-wire electric energy meters, the three current lines in three-phase four-wire systems, group protection of certain auxiliary circuits (such as control lines and signal lines), and separate voltage sampling line pairs (such as special meters with only two voltage sampling lines).

[0078] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the invention, they should all fall within the scope of protection of the present invention.

Claims

1. An insulation protection tool for installing and removing electric energy meters under power, characterized in that: include: A cap barrel (1) for wrapping a bare wire end; A cap head (2) is arranged at the top of the cap barrel (1) and is used to seal the top of the cap barrel (1); A connecting rope (3), with two ends respectively connected to different hat barrels (1), for connecting the two hat barrels (1) in series; The logo (4) is printed on the outer surface of the hat barrel (1) and serves as identification information to mark the hat barrel (1).

2. The insulating protection tool for installing and removing an electric energy meter under power on according to claim 1, characterized in that: The cap barrel (1) is made of elastic material, the central hole of the cap barrel (1) is a stepped blind hole, and the shape and size of the blind hole are customized according to the shape and size of the bare wire head.

3. The insulating protection tool for installing and removing an electric energy meter under power on according to claim 1, characterized in that: The cap head (2) includes a dome shape and a pointed top shape.

4. The insulating protection tool for installing and removing an electric energy meter under power on according to claim 1 or 3, characterized in that: The connecting rope (3) connects the three hat tubes (1) in series, wherein the shape of the hat head (2) of the middle hat tube (1) is different from the shape of the hat heads (2) of the hat tubes (1) at both ends.

5. The insulating protection tool for installing and removing an electric energy meter under power on according to claim 1 or 3, characterized in that: The connecting rope (3) connects two or three hat tubes (1) in series, and the hat heads (2) of all the hat tubes (1) have the same shape.

6. The insulating protection tool for installing and removing an electric energy meter under power on according to claim 1, characterized in that: The colors of the hat tube (1) and the hat head (2) include at least yellow, green, red, and black.

7. The insulating protection tool for installing and removing an electric energy meter under power on according to claim 1, characterized in that: The logo (4) is drawn or engraved on the outer surface of the hat tube (1).

8. A method for insulation protection during live installation and removal of an electric energy meter, characterized by: Use an insulating protection tool for installing and removing an electric energy meter under power as described in any one of claims 1 to 7, put the insulating protection tool on the bare wire head that has been removed and peeled off, then remove and replace the electric energy meter, remove the insulating protection tool from the bare wire head, and connect the wire head to the new electric energy meter.

9. The insulation protection method for live installation and removal of electric energy meters according to claim 8, characterized in that: When using the insulating protection tool, different wire terminals are insulated and sleeved according to the markings (4) on the cap barrel (1) and the cap head (2), and the wire terminals of the same group are insulated and sleeved using the cap barrels (1) connected in series.

10. The insulation protection method for live installation and removal of electric energy meters according to claim 8, characterized in that: Used for live installation, disassembly and replacement of three-phase three-wire, three-phase four-wire or three-phase five-wire electricity meters.

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