ABB Relion REC615 - Signals

Figure 354: Signal scheme illustrating an automatic transfer switch and an
automatic reconnection operation caused by a temporary undervoltage on the
preferred bus 1 (all other excluded inputs are "FALSE" during the sequence)
9.5.6 Signals
Table 695: ATSABTC Input signals
Name Type Default Description
BLOCK BOOLEAN 0=False Blocking of function
UN_U_BUS1 BOOLEAN 0=False Under-voltage on bus 1
UN_U_BUS2 BOOLEAN 0=False Under-voltage on bus 2
CB1_POSOPEN BOOLEAN 0=False Circuit breaker open sta-
tus for bus 1
CB1_POSCLOSE BOOLEAN 0=False Circuit breaker close sta-
tus for bus 1
Table continues on the next page
1MRS758755 C Control functions
REC615 & RER615
Technical Manual
697