Relay protection in power supply systems with a voltage of 0.38-110 square meters. Textbook for practical calculations. 3rd edition, processed. Ershov A.M.

The purpose of relay protection of power supply systems, its elements, functional parts are considered. Examples of calculation of short-circuit currents in electric networks with a voltage of 0.38-6-10-110 kV are given, as well as the principles of building electrical networks and neutral modes.

for specialists of design organizations, engineering and technical workers of electric grid enterprises, teachers and students of higher educational institutions of the electric power profile. It can serve as a practical manual when performing calculations of protection parameters when designing power supply systems for industrial enterprises, cities and agriculture.