Types CFF12A, CFF12B, CFF12C, CFF12D - Frequency Relays
CFF12A/12B/12C/12D Frequency Relays
FREQUENCY RELAYS - CFF12A23 TO 37 - CFF12C1 AND 2 - CFF12B31 TO 52 - CFF12D1 AND 2
CFF13A Underfrequency Relay
CFF15A/15B/15C/15E Underfrequency Relays
CFF15A, B, C, E - UNDERFREQUENCY RELAYS
FREQUENCY RELAYS - TYPES CFF12A47 & UP CFF12C 13 & UP CFF12E3 & UP CFF12F1 & UP
CFF22C/23A Underfrequency Relays