Safety technology for the hottest insulated tool w

Safety technology for insulated tool operation and low-voltage live line operation

safety technology for insulated tool operation

when conducting live line operation with insulated operating rod, the operator is at ground potential or intermediate potential, keeps a certain safe distance from the live body, and uses various insulated tools for operation. In terms of safety, this method mainly requires that the insulation strength of the insulation tools used is a typical mesoscopic system degree, which must be greater than the maximum overvoltage value that may occur in the system on the basis of meeting the safety distance

most general insulating tools are equipped with metal parts. For example, in order to adapt to different voltage levels and carry conveniently, the frequently used operating rod is usually assembled from 2 to 3 sections, and there are usually metal joints between them. Different operating heads are installed at the end of the operating rod according to different work needs. Such as the hook for pushing and pulling disconnectors or drop fuses, and various metal instruments for taking spring pins. When calculating the length of insulating rod, the length of metal parts must be subtracted. General investment companies call the length of insulation tools after subtracting the metal part as the effective length. The effective length of insulated load-bearing tools and insulated ropes shall not be less than the value specified in the safety work regulations of electric power industry

when using indirect operation method and intermediate potential operation method, special attention should also be paid to the problem of electrostatic induction in safety technology. During operation, the distance between the personnel and the charged body is relatively close, and they often move in the high-voltage electric field. Due to the stray capacitance between the charged body and the ungrounded body and the earth, capacitor charging occurs. When workers are insulated from the ground, once a part of the human body touches the tower, frame or other grounding objects, or contacts the conductor insulated from the ground, personal electric shock will occur, causing casualties

safety technology for low-voltage live line work

1 special personnel shall be assigned to monitor low-voltage live line work, and tools with insulating handle shall be used to reduce about 10% of the longitudinal axial force value (3) 0%. When working, stand on a dry insulating object and wear insulating gloves and safety helmet. You must wear long sleeved clothes to work, and it is strictly forbidden to use files, metal rulers, brushes with metal objects and other tools

2 when erecting high and low voltage on the same pole and working on the low-voltage live line, check the distance from the high-voltage line first, and take measures to prevent accidental contact with the high-voltage live equipment. When the low-voltage live wire is not insulated, the staff shall not cross it. When working on low-voltage distribution devices, insulation and isolation measures to prevent phase to phase short circuit and single-phase grounding shall be taken

3 before putting on the pole, the phase line and zero line should be distinguished first, and the working position should be selected. When disconnecting the conductor in 2012, disconnect the phase line first and then the zero line. When lapping conductors, the sequence is reverse. The human body should not touch two thread ends at the same time