This research is devoted to parameters evaluations of electrical coils of transformers and reactors which should be applied for investigation voltage resonance regimes at higher frequency. Taking into account the typical equation for calculation of coils’ inductance as also practical recommendations it’s obtained a parameters (averaged radius of coil, rational current density, mass of coil and diameter of wire) family in dependence on inductance in range of 0.1 to 60mH and RMS current of 50 to 300A at assumption that thickness of windings turns is equal to the averaged radius of coil. From the results is obtained approximated equations in which inductance, RMS current and relation between length and external diameter of coil are taken as arguments. Calculating operation of raised frequency the skin-effect is taken into account and connections between resistance at raised frequency and DC current are obtained.