1. Preparation Work (1) After accepting live-line operation, the live-line operation team should decide whether it is necessary to consult the materials and investigate the site according to the difficulty of the task and the familiarity with the operation equipment. (1) Access to information: it refers to knowing the specifications of working equipment, such as lead wires and ground wires, safety factor and load, etc. from the living department (unit), operation team and reference room; Tower structure and span; System wiring, phase and operation mode; Equipment status (guidance, grounding wire reinforcement, corrosion, joints, etc.). ) and working environment, so as to determine the working method, required tools (equipment) and decide whether to stop reclosing. When necessary, it should also: (a) check the stress of lead and ground wire, or calculate the tension or hanging weight of lead and ground wire; (b) calculating no-load current, circulating current and potential difference; (c) Calculate the sag after lifting, and check the safe distance from the ground or the crossed object. (2) Site investigation: When going to the job site, we mainly know all kinds of distances, intersections, defective parts and their severity, terrain conditions, surrounding environment, and determine the required equipment and tools. According to the investigation results, decide whether to carry out live working, what working method to adopt and necessary safety measures. Pay attention to the weather forecast of the local meteorological department. After arriving at the site, judge whether the operation can be carried out according to meteorological conditions (mainly including wind speed, temperature, thunderstorm, frost, fog, etc.). ) within the scope of operation. (3) The person in charge of the work should know the mental state and health status of the team members like the back of his hand. When it is found that the operators in poor condition may endanger their safety, they shall not be assigned to work. (4) Before live working, necessary tests shall be conducted according to the operation requirements. ① Distance detection: The safe distance, the crossing distance and the distance to the ground can be measured by an insulated distance measuring rod with size marks, an insulated distance measuring rope or a non-contact distance measuring instrument. ② Insulation detection: spark gap detection device can be used. Distributed voltage detector is used for detection. ③ Phase detection: Nuclear phase detector can be used for detection. ④ Current measurement: The clamp ammeter fixed at the top of the insulated operating rod can be used for measurement. ⑤ Insulation tool detection: 2500V insulation shaking table, high voltage insulation tester or surface hygrometer can be used to detect its external insulation performance. 2. General requirements of electrostatic induction (1) Countermeasures ① Electricians working on 220KV towers should wear conductive shoes; Earthpotential electricians working on 330KV~500KV towers should wear a full set of high-voltage electrostatic protective clothing (or shielding clothing) (including hats, clothes, trousers, shoes and gloves, which are different). (2) When a strong electric field exits the operating equipment nearby, the metal part on the insulator must be grounded first, and then it can be touched by hand. (3) single-loop or multi-loop phase lines of power outage lines are erected on the same tower. However, when the adjacent phase lines of a single loop or the other loop in the multi-loop same-pole erection is electrified or the power supply has not been disconnected, the single-loop power-off phase line or the multi-loop power-off line in the same-pole erection must be grounded first, and then it can be touched by hands. ④ When using insulated transmission rope to transmit large and long metal objects in strong electric field, it must be grounded before touching with bare hands. ⑤ Cars or large metal tools placed under 330KV~500KV transmission lines or in substations must be grounded before they can be touched by hands. ⑥ The insulated overhead ground wire should be regarded as a charged body, and the operator should keep enough safe distance from it or use an insulating rod with ground wire before touching it with his bare hands. (2) Transfer * * * (Tools) ① Tools and materials needed for live working must be transferred by insulated endless rope. Pulleys and lifting point nooses close to charged bodies shall be made of insulating materials. ② The endless rope loop should keep enough distance from the charged body as far as possible. The distance depends on the size of the metal part of the transmission article plus the safe distance to the ground (or phase) at different voltage levels. (3) In the field with small equipment spacing and narrow transmission channel, the lower end of endless rope loop should be fixed by ground anchor. (4) Small tools (tools) and materials (metal binding wires should be coiled into small plates) should be put into tool bags. Metal parts with long dimensions should be fixed on endless rope rings for directional transmission. ⑤ Metal wires that can transmit equipotential electricians but cannot be coiled (such as jumpers and pre-twisted wires) can be hung by transmission ropes and transmitted parallel to the ground, and the moving direction and the distance to the charged body can be controlled by control ropes. ⑤ When circulating downward to exchange tools and instruments for transferring heavy objects, the old and new heavy objects should be tied with control ropes. Prevent the transported articles from colliding with each other and accidentally touching the load-bearing tools (devices) under working conditions. (3) Preventing over-traction ① Tightening the wires and ground wires will cause over-traction, especially the isolation gears (including inter-frame buses). Therefore, when selecting the method of tightening wires and ground wires with electricity, it should be considered that the overstretching amount should not exceed the overstretching length specified in the design. (2) When replacing the tensile insulator string, the tie rod method should be adopted. Remove bolts and pins connecting insulator strings with cross arms or tension clamps at the end of wires in machines and tools to reduce excessive traction. (3) The reconnection of the wires in the middle of the line is only allowed in the multi-stage tensioning section, and it is not advisable to use pulleys to tighten the wires. (4) In the handling of sudden climate change, the person in charge of the work should constantly monitor climate change. When the sudden climate change endangers the safety of operation, it is necessary to stop the operation in time, restore the equipment to its original state quickly, or take necessary measures.