Methods of improving the protective shutdown system in the context of electromagnetic compatibility

The article shows the basic rule of electrical safety, the principle of which can be realized when constructing three levels of protection, namely: the main one, protection in case of insulation damage, additional. It is indicated that the basic protection is determined by the use of measures against direct contact of a person with live parts; protection in case of insulation damage is provided by automatic shutdown; additional protection is provided when using residual current devices. In networks with deadly grounded neutral, the cause of electrotraumatic damage is the presence of voltage on exposed conductive parts; therefore, all electrical receivers must be grounded by connecting to a PEN or PE conductor, depending on the power supply system, namely: TN-C, TN-S, TN-CS. The analysis of safety systems in networks of various modifications and schemes of inclusion of protective shutdown devices was carried out in order to ensure maximum electrical protective efficiency and a significant reduction in the danger of electroporation in the operation of electrical installations, including non-stationary ones, used in various conditions.