Damage preventing identification system for monitoring temperatures of one or both of electrical conductors (50a-c) and coupling points of electrical conductors (50a-c) of an electrical plant comprising several phases on the same electrical circuit, including a plurality of identification units configured for arrangement to a surface, end cap or cable shoe of each of the electrical conductors (50a-c) of the same electrical circuit of said electrical plant, which identification units comprise - an encapsulation for arrangement of the identification units to the electrical conductor (50a-c), - visual tagging means (12, 16) housed in the encapsulation, - means for electronic tagging housed in the encapsulation, - temperature measuring means (14, 17), wherein the system further comprises a central unit that comprises - an antenna - a reader unit, - means for communication with the identification units, - a monitor providing messages about the state of the electrical plant, wherein the central unit is configured to register the identification units with a unique code and information of which circuit of the electrical plant they belong to, wherein the central unit is configured to process and evaluate measured temperature values by the identification units, wherein the central unit is configured to check if there are deviations in measured temperature between different phases on the same circuit of the electrical plant. - an encapsulation for arrangement of the identification units to the electrical conductor (50a-c), - visual tagging means (12, 16) housed in the encapsulation, - means for electronic tagging housed in the encapsulation, - temperature measuring means (14, 17), wherein the system further comprises a central unit that comprises - an antenna - a reader unit, - means for communication with the identification units, - a monitor providing messages about the state of the electrical plant, wherein the central unit is configured to register the identification units with a unique code and information of which circuit of the electrical plant they belong to, wherein the central unit is configured to process and evaluate measured temperature values by the identification units, wherein the central unit is configured to check if there are deviations in measured temperature between different phases on the same circuit of the electrical plant. - an antenna - a reader unit, - means for communication with the identification units, - a monitor providing messages about the state of the electrical plant, wherein the central unit is configured to register the identification units with a unique code and information of which circuit of the electrical plant they belong to, wherein the central unit is configured to process and evaluate measured temperature values by the identification units, wherein the central unit is configured to check if there are deviations in measured temperature between different phases on the same circuit of the electrical plant. wherein the central unit is configured to register the identification units with a unique code and information of which circuit of the electrical plant they belong to, wherein the central unit is configured to process and evaluate measured temperature values by the identification units, wherein the central unit is configured to check if there are deviations in measured temperature between different phases on the same circuit of the electrical plant.