Woodward LS-5 v2 Series - System a; System B Phase Rotation

This value refers to the "SyB. rated
active power" (parameter 1748).
3123 Delay 2 1 to 999 s
[30 s]
If the monitored system B power does
not fall below the limit con󰈡gured in
parameter 3125 before the time
con󰈡gured here expires, a "CBB open"
command will be issued together with
an alarm "CBB unload mismatch" and
the logical command variable "08.46"
will be enabled.
3121 Alarm class 2 Class A/B/C/D/E/F/Control
[B]
Each limit may be assigned an
independent alarm class that speci󰈡es
what action should be taken when the
limit is surpassed.
Notes
For additional information refer to ╚═▷
“9.4.1 Alarm Classes”
3122 Self acknowledge 2 Yes The control unit automatically clears
the alarm if the fault condition is no
longer detected.
[No] The control unit does not
automatically reset the alarm when
the fault condition is no longer
detected.
The alarm must be acknowledged and
reset by manually pressing the
appropriate buttons or by activating
the LogicsManager output "External
acknowledgement" (via a discrete
input or via an interface).
3126 Monitoring lockable 2 Yes Monitoring for fault conditions is only
performed if "Lock Monitoring Status
24.40 is false."
[No] Monitoring for this fault condition is
continuously enabled regardless of
"Lock Monitoring Status 24.40".
4.3.3.7 System A / System B Phase Rotation
General notes
Correct phase rotation of the phase voltages ensures that damage will not occur during a
breaker closure. The voltage phase rotation alarm checks, if the phase rotation of the
measured voltage systems are identical.
If the control unit detects di󰈠erent phase rotations of system A and system B, the alarm
will be initiated and a breaker synchronization is inhibited. However, this alarm will not
prevent a dead busbar closure, i.e. a dead bus start.
137LS-5 v2 Series37650
4 Con󰈡guration
4.3 Con󰈡gure Monitoring
Released