74286526
Jun 18, 1992
Feb 23, 1993
electrical capacitance, dielectric, insulation, impedance, partial discharge, phasing, and/or resistance test sets with analog and/or digital displays for measuring and calibrating; ohmmeters; and electrical detectors for determining fault locations and/or voltages in electrical networks; and electrical measuring instruments for measuring transformer loss and transformer turn ratios
Electrical and Scientific Apparatus