To the problem of technogenic safety of electrical installations at the objects

Abstract

The characteristic of technogenic safety of stationary and non-stationary electrical installations is given. Information is given about the danger of electrical injury to a person during the operation of non-stationary electrical installations. The social significance of the use of protective shutdown devices, which are an effective means of protecting a person during the operation of stationary and non-stationary electrical installations, is indicated. The analysis of the existing electrical networks of TT, TN, IT systems with their structure, the use of neutral grounding of the power source and electrical receivers is given. The prospects of protective shutdown devices for use in single-phase and three-phase electrical networks in the presence of systems with grounding and zoning of electrical installations are shown. The necessity of using protective shutdown devices for group and individual protection of electrical installations, taking into account the category of premises, is noted. The article describes the importance and significance of ensuring the safety of the use of non-stationary electrical installations connected to portable single-phase or three-phase protective shutdown devices.