DC backup power supply device and method for diagnosing the...

Device for protection against short circuits for AC networks and

Device protection using temperature compensation

Devices and methods for detecting islanding operation of a...

Differential fault current protection of a multiprocessor contro

Differential protective relay apparatus

Differential protective relay for electrical buses with...

Differential relay for protecting an electrical power transmissi

Digital calculation type differential relay

Digital protective relay apparatus

Direct transfer trip apparatus for use with an active pilot wire

Directional comparison blocking protective relay system

Directional comparison blocking system

Directional detection in connection with faults in a power suppl

Distributed monitoring and protection system for a...

Distributed monitoring and protection system for a...

Distribution control system and distribution control method capa

Doubly overload-protected power distribution system

Drive circuit for the trip actuator of a network protector...

Dynamically configurable relay element and related methods