http://www.ieu2006.org/Default.aspx?tabid=79&forumid=16&scope=threads2010-09-05T02:24:42Z2009-08-02T17:01:24Z302009-08-02T17:01:24ZEng.Alihttp://www.ieu2006.org/Default.aspx?tabid=79&forumid=16&scope=posts&threadid=64Dear All: The GIS  (gas insulated switch gear ) in different ranges of voltage 33kV up to 400kV is very usefule and I am ready to answer and give the information to any one who interest on this system. Many Regards0