Apparatus and method for circuit protection
Apparatus for fault direction-comparison protection
Audio bandwidth interface apparatus for pilot wire relays
Automatic sectionalizing system
Carrier relay system
Comparison signal error detector for protective relay system
Data and/or energy transmission device with a disconnecting unit
Digital protective relay system
Directional comparison blocking protective relay system
Fault detection method and apparatus
Fault identification system for use in protective relays for pow
High speed single-pole trip logic for use in protective relaying
In-band signal-to-noise ratio monitor for an FSK relaying system
Line fault monitoring apparatus
Line protection switch equipment
Loop fault isolator
Loss-of-potential supervision for a distance relay
Method and system for communications channel delay asymmetry...
Modified offset keying apparatus for phase comparison relaying
Notebook computer with two displays