The Time Servers are equipments that work to provide a time basis with high accuracy (up    to 100 nano seconds) for systems that use time information as reference.

   Some examples of Time Servers technology use are: systems of tariffs for fixed or mobile    phones, telecommunication networks by SDH radio, WAN or LAN computers network,    protection and registration systems in transmission installations, generation and distribution    of energy, as well as hour-seasonal electric power tariff system.

   The Brazilian electric system is mostly constituted by an interconnected network of    transmission, where an event, in any part of its several branches, may affect the whole    electric power network. Thus, in order to be able to have an accurate analysis of all these    interactions, it is necessary to keep a single time basis for the whole registration, command    and protection system.

   The Time Servers are based on the reception of satellite signals, by GPS (Global Positioning    System), which is currently the most used system as standard source for time and position    all over the world.