Live working methods and precautions for aerial working vehicles

The live working of high-altitude vehicles refers to the use of insulated operating poles, such as potential, water flushing and other operating methods in the live equipment. Insulation must also be used in aerial vehicles to prevent thunderstorms from working at heights.
The live working of high-altitude vehicles can be implemented by insulation and using insulated tools. In general, the indirect operation method is a working method in which insulating tools are used as main insulation and insulated wear is used as auxiliary insulation. This method of operation refers to a method in which an operator maintains a sufficient safety distance from a charged body and performs work with an insulating tool. Each part of the human body is kept away from the live body and the grounding body by insulating protective equipment (insulated gloves, insulating clothes, insulated boots), and the human body is not at ground potential. Therefore, this operation method should not be mistakenly referred to as ground potential operation method.

The direct operation method refers to a method in which a worker directly accesses a charged body by means of an insulating arm or an insulating ladder of a high-altitude vehicle, and a person directly wears an insulating protective tool in various parts of the human body. This method of operation should not be called equipotential work in the name because the body and the charged body are not equipotential when working with insulating gloves. In the electrified operation of the distribution line, whether it is the direct operation method or the indirect operation method, if divided according to the human body potential of the operator, it belongs to the intermediate potential operation method. According to the classification of insulation tools used in the live work of distribution lines, according to the main insulation tools used to divide, the frequently used operating methods are as follows:

Insulating tools on poles Workers rode to appropriate positions by means of poles (stuck, etc.), fasten their seat belts, maintain a safe distance to the system voltage, and apply insulation rods equipped with different tool accessories at the end Do your homework. When the operation method is adopted, a longitudinal insulation protection between the live body and the ground is composed of insulating tools, insulating gloves and insulating boots, wherein the insulating tool plays a role of main insulation, and the insulating boots and insulating gloves play an auxiliary insulating role; Insulation masks, insulating clothing constitutes a lateral insulation protection between the charged body and the person or between different phases of the charged body, so as to avoid short circuits between phases or relatively short circuit due to excessive human motion amplitude. The operating method is characterized by being free from restrictions of traffic and terrain conditions, and can be operated at a pole position where a high-altitude insulating bucket arm can not reach. However, the mobility, convenience, and air operation range are not as good as that of an insulated bucket arm. The on-site monitoring and management personnel shall mainly monitor the safety distance between the human body and the charged body and the minimum effective length of the insulation tool. Before the operation, the electrical insulation strength and mechanical strength of the tool used shall be strictly checked.

Insulation Platform Operation Methods Insulation platforms are usually constructed of insulated joists, monopod ladders, and insulated bodies. Operators can work with indirect methods through insulated tools, and can also work directly with insulated gloves. The insulation platform acts as the main insulation between the grounds. Regardless of whether it is an indirect method or a direct operation method, in general, prior to carrying out work on the phase to be overhauled, insulation shields and isolators should be used to shield or isolate adjacent phase electrified bodies. At the same time, operators should wear a full set of insulated protective equipment. When working directly through insulated gloves, rubber insulated gloves should be covered with protective gloves that are worn or punctured.

The working method of the insulated bucket arm vehicle adopts an insulated bucket arm truck to carry live working, which has the advantages of convenient lifting, strong maneuverability, large operating range, high mechanical strength, and good electrical insulation performance. The live working insulated bucket car began to be developed in the United States and Europe in the 1930s, and it has been widely used in the live working of distribution and distribution lines in the 1950s. The insulation arm of the insulation bucket armor is made of glass fiber reinforced epoxy resin and wound into a cylindrical or rectangular cross-section structure. It has the advantages of light weight, high mechanical strength, good insulation properties, strong hydrophobicity, etc. Provides relative insulation protection for the human body. Some of the insulation buckets are single-layer buckets, and some are double-layer buckets. The outer hoppers are generally made of epoxy glass-fiber reinforced plastic and the inner hoppers are made of PTFE. The insulating hopper should have high-strength electrical insulation, and together with the insulating arm, constitute a longitudinal insulation between the relative ground, so that the vehicle's leakage current is less than 500 bases. At the same time, if the insulation hopper touches both phases at the same time, no flashover will occur. Insulating bucket arm car bucket positioning, some through the upper arm of the insulating arm directly to the operator in the bucket, and some are controlled by the personnel on the lower bridge, some of the upper and lower parts of the truck can be hydraulically controlled. The bucket has a horizontal and vertical rotation function and can be horizontally or vertically moved in parallel with a wire or pole. It is a convenient, flexible, widely used and low-intensity operation method that the high-altitude insulation bucket arm car is used for the electrified operation of the distribution network.