The type KA-4 relay is an auxiliary relay used in a distance carrier relaying scheme to block or prevent instantaneous tripping for faults external to the line section to which it is applied, and to permit instantaneous simultaneous tripping for internal faults. The relay is arranged to respond to indictions of fault power and direction provided by phase and ground relays, thereby controlling the transmission of the carrier signals.
Why ABB?
-
Long production life, ease of application and reliable protection
- High quality design
- 12 year warranty
- Short lead times
- Consistent on-time delivery
-
24/7 customer support