Design Tip AUX RELAYS

TIMING FOR AUXILIARY RELAYS

1. High speed relay used for SOE, TFR 1ms

2. Other signals ANNU, SCADA 4 ms

3. BF initiation timers ( 0 - 100 ms)

4. High speed 85 DTTR, 85 PD relays 4 ms

5. DC supervision relays 100 ms