1. A system for monitoring, control and management of a plant where hydrometallurgical processes of electrowinning or electrorefining of non ferrous metals are conducted, which enables measuring the process variables and transforming them into electronic signals, in which said system comprises: at least one group of electrolytic cells ( 1 , 2 , 3 , 4 ) which has a container and electrolyte in its interior; a plurality of electrodes ( 5 ) installed in the interior of each electrolytic cell, alternatively forming anodes and cathodes, for the electrodeposition of a non ferrous metal contained in the electrolyte; a plurality of electrode hanger bars ( 5 ) alternatively forming hanger bars for the anodes ( 20 ) and hanger bars for the cathodes ( 18 ); a plurality of support electric insulators ( 15 ) located in the upper portion of the lateral walls between two adjacent cells; a plurality of electric bus bars ( 6 ); and a plurality of spacer electric insulators ( 16 ) that sit on the electric bus bars ( 6 ), each spacer electric insulator ( 16 ) having monolithic non contact insulator saddles ( 17 ) allowing alternating support of the hanger bars for anodes ( 20 ) and of the hanger bars for cathodes ( 18 ); said system being characterized in that each support electric insulator ( 15 ) of the plurality of support electric insulators has in the upper lateral edges at least one monolithic multifunctional cavity ( 12 ), disposed for the installation and operation of the circuits and/or electronic sensors ( 11 ) over the entire length of the support electric insulator ( 15 ); each spacer electric insulator ( 16 ) that sits on the electric bus bars ( 6 ) has in its body one or more multifunctional cavities ( 12 ), disposed for the installation and operation of circuits and/or electronic sensors ( 11 ) over the entire length of the spacer electric insulator ( 16 ) just under the hanger bars of the cathodes ( 18 ) and the hanger bars of the anodes ( 20 ); and each electrode hanger bar ( 5 ) that forms alternately an anode hanger bar ( 20 ) or a cathode hanger bar ( 18 ), has a multifunctional cavity ( 12 ), disposed for the installation of electronic circuits ( 34 ) that allow identifying exclusively each cathode or anode and its relative location in each cell.