Digital frequency relay
GE Relays
Type SFF relays are digital frequency relays designed to operate when the system frequency changes to a predetermined level. They may be set for over-, under-, or restore- frequency operation. Versions are available with one, two, or four frequency points independently settable for function, frequency value, and output delay.
Features and Benefits
Easy setpoint setup
AC or DC control power
Drawout case
Applications
Load shedding frequency schemes
Protection and Control
Under and overfrequency with undervoltage cutoff
