On-line detection of partial discharge in electrical power...
One-terminal fault location system that corrects for fault resis
Online fiber optic sensor for detecting partial discharge...
Open cable locating for sheathed cables
Open fault location system for photovoltaic module strings
Open head detection circuit and method
Open-circuit failure detection circuit
Optical potential field mapping system
Overload protection circuit for line drivers
Overvoltage detection apparatus, method, and system