Testing power stations and substations, networks the analysis of the quality of electric power measurement and the analysis of environmental parameters checking the electric brushes of industrial objects according to standards CEI 64-8, EN61557, VDE 0100, BS 7661 checkings of integrity and the measurement of the resistance of shielding wires by the current of 10[A] the measurement BONDS general and selective type parameters the measurement of circuit impedance “phase- phase” and “phase - neutral particle” and the calculation of the expected current [KZ].