Patents Assigned to Light Serviços de Electricidade S/A
  • Device and method for inspecting aluminum cables with a steel core (aluminum conductor steel reinforced—ASCR) installed in energized electrical energy lines
    Patent number: 9696280
    Abstract: This invention concerns a device and a method for inspecting aluminum cables with a steel core (ASCRs), installed in energized electrical energy lines, which use the ECT (Eddy Current Testing) technique for evaluating the remaining thickness of the zinc layer which covers the steel wires of the cables inspected, where the readings of the tension of the detection solenoid and the current of the excitation solenoid are taken as the current of the conductor reaches zero, the electrical parameters of the conductor are corrected for the average temperature during the inspection and the signal from the detection solenoid is filtered through a hybrid circuit which is designed to increase the sensitivity of the measurement.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: July 4, 2017
    Assignees: Light Serviços de Electricidade S/A, Fundação CPQD—Centro de Pesquisa e Desenvovlvimento em Telecomunicações
    Inventors: Célio Fonseca Barbosa, Flávio Eduardo Nallin, Raphael Nunes de Souza
  • Filler paste, coating painting and composite for coating wooden poles
    Patent number: 8735307
    Abstract: It is an object of the invention to provide a number of coatings for protection of wooden poles including filler paste, coating paints and glass fiber-polyester resin based composites which may be applied to wooden poles in the field. These coatings contain different anti-flame and antifungal additives.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: May 27, 2014
    Assignee: Light Servicos de Electricidade S.A.
    Inventors: Bluma Guenther Soares, Fabio Ladeira Barcia