A system for detecting the meters of each low-voltage line of transformation centers, comprising the following components: - a transformation center having low-voltage output lines, said low-voltage output lines being in contact with final meters; - receivers which communicate with the meters; and - a concentrator included in said transformation center and connected to a secondary side of a transformer, said concentrator making contact and communicating with said receivers through a communication line; wherein these components are in combination with one another and use a PLC communication protocol including frames corresponding to upward messages from the meter to the concentrator, characterized in that: - inductive-receiving sensors are arranged around a same phase or neutral of each of the low-voltage output lines; and the receivers are in turn communicated with said inductive-receiving sensors using said PLC communication protocol; and in that: A) the inductive-receiving sensors collect the current induced in the cable of the low-voltage output lines by said PLC communication frames and the inductive-receiving sensors or the receivers store an internal table including values of the induced current, said values being a parameter obtained from the PHY_DATA.level variable of each frame, the frames being a frame of the same type for all the sensors, the parameter being the Level parameter (dBuV); and B) the concentrator queries all the inductive-receiving sensors of the low-voltage output lines to know what is the current level they hear from each of the PLC communications of the meters, and upon having obtained the values the concentrator stores the values in an indexed table, and by applying Kirchhoff's nodal rule and a statistical treatment of the received values deduces and establishes the one showing a higher statistical current value, the meter depending on the line thereby being identified, thus determining and identifying all the meters of each low-voltage output line of the transformation center. - a transformation center having low-voltage output lines, said low-voltage output lines being in contact with final meters; - receivers which communicate with the meters; and - a concentrator included in said transformation center and connected to a secondary side of a transformer, said concentrator making contact and communicating with said receivers through a communication line; - inductive-receiving sensors are arranged around a same phase or neutral of each of the low-voltage output lines; and the receivers are in turn communicated with said inductive-receiving sensors using said PLC communication protocol; A) the inductive-receiving sensors collect the current induced in the cable of the low-voltage output lines by said PLC communication frames and the inductive-receiving sensors or the receivers store an internal table including values of the induced current, said values being a parameter obtained from the PHY_DATA.level variable of each frame, the frames being a frame of the same type for all the sensors, the parameter being the Level parameter (dBuV); and B) the concentrator queries all the inductive-receiving sensors of the low-voltage output lines to know what is the current level they hear from each of the PLC communications of the meters, and upon having obtained the values the concentrator stores the values in an indexed table, and by applying Kirchhoff's nodal rule and a statistical treatment of the received values deduces and establishes the one showing a higher statistical current value, the meter depending on the line thereby being identified, thus determining and identifying all the meters of each low-voltage output line of the transformation center.