Construction distance around transformer

According to the safety regulations of the power industry, the safety distance of the equipment when there is no power outage. Voltage level (KV) Safety distance (m) 10KV and below 0.7 20, 35 1 66, 110 1.5 220 3 330 4 500 5 Although the distance has been determined in the safety regulations, I want to draw a safety distance of 110KV 1.5m. But if their hoisting operations come into contact with the outside during the construction process, someone will die if they do.

Must meet the minimum requirements of current laws and regulations； At the same time, different jobs should also have different requirements.: In addition, each operation has its own corresponding safety regulations.: For example, lifting operations: Safety Specifications for Special Operations in Chemical Production Units (GB30871-2014) Medium: 9.2.3 Hoisting operations should not be carried out close to power transmission lines. When it is necessary to operate near power transmission lines, the safety distance of the hoisting machinery should be greater than the collapse radius of the hoisting machinery and comply with the requirements of DL409 ； If it cannot be satisfied, work should be carried out after a power outage. If there are equipment, pipelines, etc. containing hazardous materials in the hoisting site, a detailed hoisting plan should be formulated, and effective protective measures should be taken for the equipment and pipelines. If necessary, the equipment should be stopped, the materials should be evacuated, and the hoisting operation should be carried out after replacement.

Today, I discussed with an electrical specialist that there seems to be no clear regulations on the construction distance of power plant transformers, only wiring regulations. So we determined the distance of 20M based on this. If you know about this rule, please share the name.