Safe Work in The Vicinity of Live Parts on High Voltage Double-Circuit Overhead Lines

To ensure the availability of electrical power grid, some maintenance and installation works are sometimes carried out in the vicinity of live parts or near high voltage installations. In practice this means that work is carried out on double-and multi-circuit overhead lines and works are carried out on a circuit that is not under voltage (dead), while the other circuit is at the same time under voltage (live). In all such cases of work in the vicinity of live parts the workers must observe the appropriate safety distance, which is prescribed in regards to the voltage level and the third danger zone. Even when taking into account all safety factors, such works can cause increased risks to safety at work, for example risk of electric shock due to induced voltages, voltages of capacitive sets etc. To reduce these risks, special attention should be paid to ensure safety and health at work in the vicinity of live parts with appropriate regulations, reviews of dangerous occurrences, introduction of improvements to working tools and procedures, qualification of workers and consistent use of prescribed personal safety equipment. Based on domestic and worldwide practises, measurements and findings, we conclude that written safety instructions or a manual for safe work in the vicinity of live parts is necessary.