76636793
Apr 22, 2005
Dec 26, 2006
Electrical test equipment for the electric power generating and transmission industry; Apparatus for identification of a phase of a transmission line; Apparatus for identification of a phase of a line relative to a known phase; Apparatus for determining phase angle between a selected measurement point and a reference point; Portable apparatus for measuring a phase relative to a known phase; A reference unit and a field unit for measuring a phase relative to a known phase
Electrical and Scientific Apparatus