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Load fault detections on busbar, such as overcurrent and earth-fault functions are
connected as grouped protection input to
BLOCK
.
Auto mode OFF/ON
is connected to
input
BLOCK
.
GUID-B9F3739B-FBA6-4F2D-AD69-02B026229C77 V1 EN
Figure 355:
Signal scheme illustrating an automatic transfer switch and an
automatic reconnection operation caused by a temporary under-
voltage on the preferred bus 1 (all other excluded inputs are "FALSE"
during the sequence)
9.5.6
Signals
Table 676:
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 status for bus 1
CB1_POSCLOSE
BOOLEAN
0=False
Circuit breaker close status for bus 1
CB2_POSOPEN
BOOLEAN
0=False
Circuit breaker open status for bus 2
CB2_POSCLOSE
BOOLEAN
0=False
Circuit breaker close status for bus 2
1MRS758755 A
Section 9
Control functions
REC615 and RER615
671
Technical Manual
Summary of Contents for RELION Series
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