As the most direct and effective overhaul measure of UHV transmission lines

live working has signifi-cance for ensuring safe and stable operation of UHV grids and security of national energy. In this paper

we analyzesfeasibilities among"reaching operation point by taking the basket from the crossarm"

"entering the jumper from thetower body with the hanging basket"and"reaching the operation point with the rope ladder"based on abnormal tem-perature rise of UHV lines during live working

and finally decided the operation mode of stepping on the rope ladderfrom the crossarm

sliding out along the ground wire

and then entering the equipotential along the rope ladder. In or-der to achieve this operation mode

the body surface intensity distribution of operators"when operators are on thetower"

"when the rope ladder slips to the middle position of the insulator chain"

and"when operators are locatedon the wire"are analyzed with the finite simulation software. The calculation result shows that in the whole process ofentering the equipotential

the largest filed intensity on body surface appears on top of operators’ heads on the wirewhich is nearly reaching 1

706 kV/m. When the operators wear shield cloths with 60 dB shielding efficiency

andmesh shield mask whose shielding efficiency is no smaller than 20 d B

the safety of the operators can be ensured. Af-ter taking all problems into account and using the above method for operation

the operators smoothly finished thetask of processing abnormal temperature rise of UHV lines alive.