Due to the new technologies and power networks development, the number of extremely high-voltage power frequency sources increases. These sources may affect the human nervous, cardio-vascular systems as well as vision. Maintenance, repair, and adjustment of high-voltage equipment is carried out by the electricotechnical staff. Electrotechnical staff is exposed to power frequency electric field from the switchyards and overhead transmission lines where permissible limit values are exceeded. Human health protection from the harmful power frequency electromagnetic field effects is an actual issue of the occupational safety. Staff safety work must be provided by use of the personal protective equipment from unfavorable and hazard occupational factors.
Usual personal protective equipment is the conductive suit, which includes conductive clothes, facescreen, gloves and footwear. Screening property of the personal protective equipment are based on the principle of Faraday cage, which is realized by the conductive materials. These materials and personal protective equipment need to have optimal air permeability and water vapor transmission properties. In accordance with the possible work outdoors, in the warm season especially, electrotechnical staff is exposed not only to the main harmful occupational factor, and climatic environments too, such as air temperature, its movement speed, humidity. Personal protective equipment development requires complex multifactorial assessment with special attention to the human body physical load value, his functional state, metabolic parameters, as well as suit thermal insulation.
2. Bidi M. Biological risk assessment of high-voltage transmission lines on worker’s health of electric society. Archives of Electrical Engineering. 2020. Vol. 69. № 1. pp. 57–68. DOI: 10.24425/aee.2020.131758
3. Foster K.R. Mechanisms of interaction of extremely low frequency electric fields and biological systems. Radiation Protection Dosimetry. 2003. Vol. 106. № 4. pp. 301–310. DOI: 10.1093/oxfordjournals.rpd.a006364
4. Extremely Low Frequency Fields (Environmental Health Criteria; 238). Available at: https://inchem.org/documents/ehc/ehc/ehc238.pdf (accessed: February 1, 2022).
5. Tarao H., Hayashi N., Matsumoto T., Isaka K. Currents and electric fields induced in anatomically realistic human models by extremely low frequency electric fields. Journal of Energy and Power Engineering. 2013. Vol. 7. Iss. 10. pp. 1985–1991.
6. On approval of the Rules for the technical operation of consumers electrical installations (as amended on September 13, 2018): order of the Ministry of Energy of Russia of January 13, 2003 № 6. Available at: https://docs.cntd.ru/document/901839683 (accessed: February 1, 2022). (In Russ.).
7. GOST 12.4.011—89. Occupational safety standards system. Means of protection. General requirements and classification. Available at: https://docs.cntd.ru/document/1200000277 (accessed: February 1, 2022). (In Russ.).
8. Morozovskiy D.A., Roldugina A.E. Complex requirements for overalls. Nauchnyy almanakh = Science Almanac. 2018. № 6-2 (44). pp. 49–51. (In Russ.). DOI: 10.17117/na.2018.06.02.049
9. Kolechitskiy E.S., Korolev I.V. On the use of personal protective equipment against the effect of an electric field of industrial frequency. Novoe v rossiyskoy elektroenergetike = New in the Russian electric power industry. 2010. № 3. pp. 37–45. (In Russ.).
10. Rubtsova N.B., Perov S.Yu., Chernov I.A., Makarova-Zemlyanskaya E.N. Power Supply Network Facilities’ Personnel Security When Applying Individual Protection Equipment Against Electric Fields of Industrial Frequency. Bezopasnost v tekhnosfere = Safety in Technosphere. 2018. Vol. 7. № 2. pp. 35–41. (In Russ.).
11. Flouris A.D., Dinas P.C., Ioannou L.G., Nybo L., Havenith G., Kenny G.P., Kjellstrom T. Workers' health and productivity under occupational heat strain: a systematic review and meta-analysis. The Lancet Planetary Health. 2018. Vol. 2. Iss. 12. pp. e521–e531. DOI: 10.1016/S2542-5196(18)30237-7
12. Prokopenko L.V., Afanaseva R.F., Bessonova N.A., Burmistrova O.V., Losik T.K., Konstantinov E.I. Methodic approaches to evaluation of microclimate at workplace, with application of various types of clothing protective against occupational hazards. Meditsina truda i promyshlennaya ekologiya = Russian Journal of Occupational Health and Industrial Ecology. 2013. № 4. pp. 10–18. (In Russ.).
13. Fanger P.O. Thermal Comfort: Analysis and Applications in Environmental Engineering. Copenhagen: Danish Technical Press, 1970. 244 p.
14. ASHRAE Standard 55—2004. Thermal environmental conditions for human occupancy. Available at: http://arco-hvac.ir/wp-content/uploads/2015/11/ASHRAE_Thermal_Comfort_Standard.pdf (accessed: February 1, 2022).
15. GOST R ISO 7730—2009. Ergonomics of the thermal environment. Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria. Available at: https://docs.cntd.ru/document/1200076557 (accessed: February 1, 2022). (In Russ.).
16. Fedorovich G.V. Dose-effect dependence in the occupational hygiene. Risk-oriented approach. Saarbryukken: Plamarium Academic Publishing, 2017. 192 p. (In Russ.).
17. Van De Steenberg. Distribution characteristic and shielding of power-frequency electromagnetic field. International Journal of Applied Mathematics and Computing Science. 2014. Vol. 3. Iss. 4. pp. 1–9.
18. Tyurin I.N., Getmantseva V.V. Protective clothing functions when operating it in conditions of electromagnetic radiation. Sinergiya Nauk = Synergy of Sciences. 2018. № 23. pp. 1232–1238. (In Russ.).
19. Maity S., Chatterjee A. Conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding: A review. Journal of Industrial Textiles. 2016. Vol. 47. № 8. pp. 2228–2252. DOI: 10.1177/1528083716670310
20. Malik P., Sharma A., Kajal G., Sharma J.P. Textiles for Protection against Electromagnetic Radiations: A review. Journal of Engineering Research and Application. 2018. Vol. 8. Iss. 6 (Part III). pp. 32–37. DOI: 10.9790/9622-0806033237
21. GOST 12.4.172—2019. Occupational safety standards system. Personal protective means from power frequency electric fields. Personal screening suit. General technical requirements. Test methods. Available at: https://docs.cntd.ru/document/1200167493 (accessed: February 1, 2022). (In Russ.).
22. MUK 4.3.1895—04. Assessment of the person thermal state in order to justify the hygienic requirements for the microclimate of workplaces and measures to prevent cooling and overheating. Moscow: TsentrMAG, 2022. 20 p. (In Russ.).
23. Burmistrova O.V., Perov S.Yu., Konshina T.A. Comparative Physiological and Hygienic Assessment of the Personal Protective Equipment EP-4(0) in the Various Assembly According to Human Thermal State Indices. Gigiena i sanitariya = Hygiene and Sanitation. 2021. Vol. 100. № 3. pp. 229–233. (In Russ.). DOI: 10.47470/0016-9900-2021-100-3-229-233