SFF299A Static Frequency Relay
SFF12A Static Frequency Relay
SFF21A Static Underfrequency Relay
STATIC UNDERFREQUENCY RELAY - TYPE SFF23C
Type SFF - 12SFF23H - Static Underfrequency Relay
TYPE SFF31A,C - SFF32A,C - STATIC FREQUENCY RELAY
TYPE SFF31D - STATIC FRQUENCY RELAY
Type SFF33A - Static Frequency Relay
SFF33A/33C Static Frequency Relay
Static Under frequency Relay - Type SFF11A
Type SFF201A, SFF201B, SFF202A, SFF202B, SFF204A, SFF204B - Static Frequency Relays