The live working of the distribution line is an operation performed by the operator on the live facilities by using an insulating tool or an insulated arm vehicle. This operation requires the operator to have skilled working ability and correctly wear it in accordance with the correct working methods and procedures. Good insulation protection, installation and installation of insulation shielding tools, and through the strict management and monitoring on site, to achieve safe and efficient operation.
1 Preparation and safety matters before work1. Arrangement of the operator
The squad leader of the live working should complete the assignment of the operator on the day before entering the operation. On the day of entering the operation, if it is found that the mental and physical strength of an operator is obviously poor, the personnel should be replaced or other reasonable measures should be taken.
2. Preparation of tools and materials to the site
(1) Before the operation, the insulation shielding tools and protective equipment should be matched according to the requirements of the job site and the operation items.
(2) Insulation shielding tools, protective equipment and tools to be used at the site must be sorted out and required to be inspected and placed in the specified tool bags.
3, loading
When loading tools and materials, attention should be paid to the classification and to prevent collision, scratching or puncturing of the insulating shielding tools and protective equipment.
4, discharge
(1) It should be selected according to the materials, tools, insulation shielding tools and protective equipment.
(2) Insulating shields, protective appliances and live-operated insulating rods should be placed in a dry, cool place on a moisture-proof plastic sheet to prevent other objects from colliding.
5, the operation plan
For conventional simpler work items, the work shift planner should make the work plan on the spot on the day of the implementation of the work. For more complicated work, the work plan should be investigated, researched and worked out one day before the implementation of the work.
6. Job description, division of labor and pre-class meeting
(1) The squad leader should give instructions to the operator before the operation, and explain the contents of the operation, the sequence of operations, the division of work and precautions at the pre-class meeting, and also clarify the division of work of each operator.
(2) When the operator has doubts about the description of the squad leader, the squad leader should give an explanation to the operator until the operator fully understands it.
7. Inspection of tools, insulation shielding and protective equipment
(1) Check whether nuts such as tools are loose during handling, cracks, breakage, breakage, and other damage of insulation shielding tools and protective equipment.
(2) High-voltage insulated gloves and insulated boots should be pressed into the air to check for pinhole defects.
8. Preparation before going to the pole
(1) Before wearing the pole, you must wear insulated clothing and insulated boots on the ground and wear a safety helmet.
(2) Insulating gloves and protective gloves should be carried in a specific bag.
(3) Seat belts and auxiliary ropes for use on utility poles should be considered for ease of use and proper carrying.
9. Preparation of insulated arm car
Position the insulated boom truck in the position that best suits your job, as required by the safety manual.
2 The working steps and safety matters of entering the working position1, observe the status of each component
(1) It is necessary to inspect the roots and the upper part of the poles of the poles and poles in detail, and take measures to prevent collapse if necessary.
(2) Observe the upper state of the pole (the number of circuit turns, the installation of the pole, the installation facilities, etc.) from the ground, and select the direction and path of the aerial work vehicle.
2. Take the work bucket of the aerial work vehicle and raise it to reach the working position or the manpower bar
(1) When the operator enters the work bucket, the seat belt must first be fastened.
(2) When operating the aerial work vehicle, pay full attention to obstacles such as surrounding high and low voltage live lines, and operate smoothly.
(3) When the grounding crossarm is underneath, pay attention to the low-voltage line. For the metal fasteners, check the power from the bottom to confirm that there is no leakage.
3. Basic requirements for electricity inspection
(1) The inspection of low-voltage line supports shall be carried out using a low-voltage electroscope.
(2) The inspection of the high-voltage cross-stretcher is carried out using a high-voltage electroscope (the top of the operator's head should be located 30 cm below the crossarm).
(3) If the high-voltage electroscope does not display, the low-voltage electroscope should be used for further power verification.
(4) The work bucket of the aerial work vehicle should be adjusted until the operator stands in the work bucket, and the operator's overhead can maintain a safe distance from the live conductor.
(5) If the operator uses the foot buckle to board the pole, the safety precautions are the same as above.
3 tools and insulation shielding equipment lifting1. Install nylon sling
(1) Nylon slings should be tied to a position that does not interfere with normal operations and tied to prevent falling off.
(2) The lifting position of the nylon sling suitable for lifting should be determined according to the position of the operator and the relationship of the lower facilities.
(3) Nylon slings should be hung on a height that does not touch the ground. Care should be taken to prevent the slings from being entangled in other facilities.
2. Lifting and installation of tools and insulation shielding tools
(1) Tools and insulation shielding equipment shall be separately loaded into the specified lifting bags.
(2) Insulation (lower) work of tools and insulation shielding tools, equipment, etc. Generally, insulated small cranes of insulated arm vehicles are used. If there is no such device, insulated pulleys must be used. When lifting the item, it must be hoisted while observing, and it is necessary to prevent the hanging item from being hung on other facilities.
(3) When lifting tools and equipment, ground workers should also pay attention to and observe the items being lifted.
(4) The delivery of tools and equipment between operators should be delivered one by one.
(5) The auxiliary workers on the pole should wear the same protective equipment as the working personnel. When the working personnel are working, the auxiliary workers should pay attention to their actions.
4 installed insulation shielding tools and wearing safety equipment1, wearing high-voltage insulation gloves
(1) When wearing high-voltage insulated gloves, check each time in advance, and protective gloves must be applied outside the insulated gloves.
(2) Put on and take off the high-voltage insulating gloves in a safe place, keep a sufficient distance from the charged body, and pay attention to the live wires at the top and around the head.
2, install wire shield
(1) In the work of installing the shield on the live conductor, choose a position that is easy to nest.
(2) After the wire shield is inserted, it should be tied with an insulated string to prevent slipping.
(3) If there are cables or low-voltage lines around the working position, insulation barriers, high-voltage insulation blankets, etc. should be used to isolate and protect the close parts of these facilities.
(4) When installing a shield for a live conductor, install it from the nearest conductor to the remote conductor. When shielding devices are provided for the multi-layer distributed live conductors, the upper conductors should be installed in order from the lower conductors.
3. Set the shielding device for the insulator
(1) The insulator shielding device uses an insulator cover or an insulating blanket, and the joint with the wire shield should have a coincident portion of more than 15 cm and be fastened with an insulated rope.
(2) The order in which the insulator shield and the wire shield are installed is to first install the wire shield and then install the insulator shield.
5 operating principles1. Work according to the established work steps
(1) The live working items must be carried out by more than 2 people, and there must be guardians on site.
(2) For each live working item, it should be carried out according to the specified working steps. If the working item is not clearly defined, refer to the steps of using other existing working items.
2, the operation of the adjacent electrified body
(1) For the protection method for the operation of the adjacent live conductor, the insulation shielding device shall be provided with reference to the protective method when the live working is carried out.
(2) When working in the vicinity of the live conductor, it is not necessary to make an incorrect judgment on whether or not to provide insulation shielding and isolation. Do not arbitrarily omit the insulation protection.
3. Monitoring during the operation
(1) The operation monitor should always grasp the overall situation of the operation, pay close attention to the movements of the operators, and make appropriate instructions in time according to the operation steps.
(2) When the squad leader is absent, a suitable ground guardian must be identified to perform the guardianship work instead of the squad leader.
4. Inspection after operation
(1) After each step of the operation is completed, it should be checked immediately. If the installation of the insulation shielding tool is completed, before entering the next step, it should be checked whether the installed shielding device is perfect, proper, and in all operations. Check again when done.
(2) In the inspection at the end of the operation, pay special attention to the existence of forgotten and unfinished items, as well as matters that are not perfect in the operation, and then remove the insulation shielding equipment.
5, working time
The squad leader should have an in-depth understanding of the fatigue level of the operator. The continuous time of the actual live working should not be controlled for more than 30 minutes, and the appropriate rest interval should be maintained. If necessary, the shift can be alternated between two shifts.
6Removal of insulation shielding equipment1. Remove the insulation shielding device
(1) When removing the insulating shield, the insulating shield must be removed from under or on the side of the wire.
(2) When removing the high-voltage insulation blanket provided on the insulator, first remove the insulation rope clamp, then pull the high-voltage insulation blanket from the side below to remove it.
(3) When removing the wire shield, first turn the opening upwards and then remove it from below.
(4) When removing the insulating shielding device, care should be taken not to cause the wire or the like to be significantly vibrated or to be deformed, and to be removed as lightly as possible.
(5) The order of removing the insulating shielding tools is to remove them from the line far away from them to the nearest line. If the insulating shielding tools are removed from the upper and lower layers, they should be removed from the upper layer to the lower layer.
(6) The order of removing the insulator shield or the high-voltage insulation blanket and the wire shield of the shielding insulator is as follows: first remove the insulator mask or the high-voltage insulation blanket, and then remove the wire shield.
(7) Take off the insulated gloves and carry them in the specified bag.
2, tools and insulation shielding equipment hanging down
Tools and insulation shielding tools should be installed in the order of the tool bag and can be hoisted, pay attention to the operation of the nylon sling, and prevent the tool bag from hanging on other facilities.
7 workers fell to the ground1, descending to the ground
(1) After the upper part of the work is completed, the completed work and the overall condition of the pole upper facility should be re-examined and checked again. After confirming that there is no problem, operate the aerial work vehicle and drop the work bucket.
(2) At the pole with low voltage line, the jumper and lead-in should be carefully checked.
2, finishing after the homework
Inspect the insulation shielding tools, safety protection tools and tools for damage, check the workers, clean the remaining materials, and clean the ground below the poles.
From the 1960s to the early 1980s, the domestic electrification operation of the distribution network was promoted. However, due to the lack of suitable personal safety protection devices and insulation shielding tools, there were many accidents in the distribution network, which caused the distribution lines to be stopped in some areas. Live work. At present, in order to improve the operational reliability of the power distribution system, each power supply unit has attached great importance to the live working of the distribution network, and many units have set up or reorganized the operation team. In order to make the live working of the distribution line safe and efficient, research and develop the standard operation steps, and make it enriched and perfected. This is a very important aspect of the management of live working of distribution lines.
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