Specific features of electrical equipment grounding on a mine site to comply with the requirements for effective protection of personnel against electric-shock hazards
E.V. Denisova1 , I.B. Guliaeva2, M.K. Marenich2
1 Saint Petersburg State University of Architecture and Civil Engineering, St. Petersburg, Russian Federation
2 Donetsk National Technical University, Donetsk, Donetsk People's Republic
Russian Mining Industry №4 / 2022 р. 110-118
Abstract: The paper provides evidence that the existing standardized design concept of power supply systems for the mine sites inherently involves existence of an electrical shock hazard to humans when touching the phase of the network. This hazard is caused by the active and capacitive conductance of the insulation due to grounding of the central cores of the flexible shielded mining cables. The functional inefficiency of the ground fault protection used in the mining industry has been proved, including the cases of mine electric networks with high power consumption. An alternative concept was justified to design the power supply system for a mine section electric network, which excludes grounding of the central cores of the flexible cables. This approach implements the principle of selective shutoff protection of the electrical consumers in the mine section using local means to control the condition of insulation in the power connections.
Keywords: mine electrical equipment, flexible cable, insulation, conductance, electrical hazard, detection, investigation, monitoring, shutoff protection, selectivity, local means, power supply system, alternative concept
For citation: Denisova E.V., Guliaeva I.B., Marenich M.K. Specific features of electrical equipment grounding on a mine site to comply with the requirements for effective protection of personnel against electric-shock hazards. Russian Mining Industry. 2022;(4):110–118. https://doi.org/10.30686/1609-9192-2022-4-110-118
Article info
Received: 01.07.2022
Revised: 21.07.2022
Accepted: 23.07.2022
Information about the authors
Elena V. Denisova – Cand. Sci. (Eng.), Associate Professor, Head of the Department of Descriptive Geometry and Engineering Graphics, Saint Petersburg State University of Architecture and Civil Engineering, St. Petersburg, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Irina B. Guliaeva – Cand. Sci. (Eng.), Associate Professor of the Department of Electrical Systems, Donetsk National Technical University, Donetsk, Donetsk People's Republic; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Mariya K. Marenich – Master's degree in Automation and Computer-integrated Technologies, candidate of academic degree in the Department of Electrical Systems, Donetsk National Technical University, Donetsk, Donetsk People's Republic; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
References
1. Dzyuban V.S. Devices for protection against leakage currents in mine electrical networks. Moscow: Nedra; 1982. 152 p. (In Russ.)
2. Yagudaev B.M., Shishkin N.F., Nazarov V.V. Protection from electric shock in the mining industry. Moscow: Nedra; 1982. 152 p. (In Russ.)
3. Varenik.Ye. O. The exchange of that zachist vid vitokiv struma at the mine electrical installations in the other 1200V: dis. ... Cand. Sci. (Eng.): 05.09.03. Dnepropetrovsk; 2004. 191 p. (In Ukr.)
4. Beloshistov A.I., Savitsky A.V., Savitsky V.N. Modernization of devices of protection from currents of leakage of AZUR-1. Vzryvozashchishchennoe elektrooborudovanie. 2017;(1):45–57. (In Russ.)
5. Savitsky A.V. A new series of microcontroller devices for protection against leakage currents to the ground in mine distribution networks with voltage up to 1200 V. Scientific works of DonNTU. Series “Elektrotechnika ta elektroenergetika”. 2013;(2):211–216. (In Ukr.)
6. Guliaeva I.B., Dubinka Ye.S., Marenich M.K., Mufel L.A., Demchenko O.A. Conductivity of insulation of the electric network of the mines as a risk factor of electric injury. problem issues and ways of their solution. Vestnik Donetsk National Technical University. 2021;(3):34–47. (In Russ.)
7. Sinchuk O.N., Kharitonov A.A. The problem of electrical injury during the operation of electrical installations in underground workings of iron-ore mines. Eastern-European Journal of Enterprise Technologies. 2014;(2):21–25. (In Russ.)
8. Morkun V.S., Sinchuk I.O., Kharitonov A.A. On the issue of analysis and estimates of the causes of electrotraumatism in the conditions of iron ore production. Girnichy visnik. 2014;(97):157–161. (In Ukr.)
9. Kovalyova I.V. Engine electrotechnical complex of mine with function of two-end power supply disconnection at emergency condition: dis. ... Cand. Sci. (Eng.): 05.09.03. Donetsk; 2012. 184 p. (In Ukr.)
