Introduction. Calculation of the electric field produced by high voltage configurations. Simulation algorithms of high voltage electromagnetic fields with concentrated elements. Partial discharges and breakdown in atmospheric air, solid, liquid and other gaseous insulating materials. Travelling waves. Arrangements for the generation of voltages and currents for test purposes: test transformers, rectifiers, arrangements for the generation of high direct and impulse voltages, damped oscillations and impulse currents. Constructional and operational characteristics, equivalent circuits. Discharges in insulators, generation of voltages and currents for test purposes in the Laboratory test field.