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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