Version 1. 0 [Electronic resource] Workshop. - Krasnoyarsk: IPC SFU, 2008. 335 s. This edition is part of the electronic educational and methodological complex in the discipline "Theoretical foundations of electrical engineering" , The training program, Training Manual , Workshop, Guidelines for independent work , Guidelines for laboratory work , Control and measurement materials "Theoretical foundations of electrical engineering . Bank of test tasks", as well as a visual aid "Theoretical foundations of electrical engineering . Presentation materials" . Methods of calculation of linear electrical circuits at constant, sinusoidal and non-sinusoidal effects. The analysis of processes in single-phase and three-phase chains. Nonlinear electric and magnetic circuits of direct and alternating currents, transition processes, as well as circuits with distributed parameters. are considered. Presented tasks and explanations for their solution, as well as tasks for self-control with answers. Intended for undergraduate students 140200. 62 "Power Engineering" and 140600. 62 "Electrical engineering, electromechanics and electrotechnology" of the enlarged group 140,000 "Energy, power engineering and electrical engineering" . Calculation of DC circuits. Method of equivalent transformations. Method of tension between two nodes. Method of equivalent generator. Single-phase chains of sinusoidal current. Calculation of currents and voltages. Symbolic method of calculation. Analysis of Resonance Modes. Analysis of chains with mutual inductance . Calculation of three-phase chains . Calculation of chains with a symmetrical EDS systemCalculation of a three-phase chain when connecting the phases of the receiver by a triangle. Calculation of a three-phase circuit when a star connects a four-wire with a neutral wire. Calculation of the three-phase chain when the star is connected by a three-wire. Emergency modes in three-phase circuits. Calculation of circuits with an unsymmetrical EDS systemElectrical circuits with non-sinusoidal periodic effects. Single-phase circuits of non-sinusoidal current. Higher harmonics in three-phase chains . Transition processes. Non-linear DC electric circuits. Magnetic DC Circuits. Nonlinear AC Circuits. Chains with distributed parameters. Conclusion. Bibliographic list