1958   Tubos Trans Electric (TTE) was founded as a company aimed to the manufacture
            of tubes for electrical applications and distribution and pole mounted transformers.

1963   Manufacture of larger power transformers begins.

1972   Manufacture of the first power transformer in 145 kV with in-house technology.

1974   International licensed technologies are incorporated. Manufacture of instrument transformers
            in 66kV and 132 kV begins under BALTEAU license

1977   Manufacture of the first instrument transformer in 220kV under the same license.

1980   SIEMENS (Germany) license is achieved for the manufacture of power transformers up to
            220 kV and 300 MVA.

1987   Manufacture of distribution and pole mounted transformers under SIEMENS license.
            Manufacture of the first 220 kV power transformer under SIEMENS license.

1988   Product line expansion for the manufacture of instrument transformers up to 500 kV under
            ASEA BROWN BOVERI (Switzerland) license.

1990   Perez Companc Group designates TTE for the industrial and administrative management of
            San Justo's facilities for power transformers up to 300 MVA and 500 kV.

1997   Implementation of ISO 9001 Quality Assurance System, certified by DET NORSKE VERITAS
            (D.N.V.).

2000   Instrument transformers business unit is sold to ARTECHE SA.

2004   TTE's stock package is entirely sold to a new investor's group headed by
             Javier O. Tizado and Jorge Francisco Tizado.

2006   TTE begins the application process for the acquisition of the patent for Biodegradable
            Dielectric Fluid to be used in transformers. A specially designed trial plant is installed for its
            development.

2008   Implementation of ISO 14001 Environmental Management System; certified by D.N.V.
            ISO 14001.
            Acquisition of new equipment for the Physical Chemical Laboratory: Liquid Chromatograph
            (HPLC) and Particle Counter (PODS); enabling in-house performance of all physical chemical
            routine tests.