Woodward easYgen-2000 Series User Manual page 263

Alarm classes
Alarm classes
Normal opera‐ A
tion
Critical mode A
Critical mode "On"
Critical mode "Off"
4.5.11.2.1 Critical Operation At Busbar
Fig. 94: Critical operation at busbar
37535B
Configure Application > Automatic Run > Critical Mode
When critical mode is enabled the alarm classes are reclassified as
follows:
B C
B B
A critical mode will be initiated/started once the critical mode oper‐
ation LogicsManager output becomes TRUE (logic "1"). The "Crit‐
ical mode" message is displayed on the display screen. If the
engine is not already running, the controller will attempt to start the
engine as configured (parameter
alarms become warning messages (see above).
A critical mode will be interrupted/stopped once critical mode oper‐
ation LogicsManager output becomes FALSE (logic "0") and the
postrun time has expired. If the operation mode changes to STOP,
this time will be considered as expired. With termination of the crit‐
ical mode, a normal cool down is performed.
Refer to Ä Chapter 9.4.3 "Logical Outputs"
on page 553 for more information about the priorities
of the logical outputs.
The aforementioned fire engine pump or other critical operation is
connected to the busbar, i.e. it requires a closed GCB to be sup‐
plied by the generator during critical operation.
Parameter 4100 Ä p. 268
configured to "Yes" and an external provision for load reduction
should be provided. This ensures the pump operation of a sprinkler
system.
Application and breaker transition mode remain as
configured.
A mains parallel operation is possible.
The GCB will not be closed if the load is supplied by
the mains until the mains fail and the MCB remains
closed because emergency run (param‐
eter
easYgen-2200/2500 | Genset Control
D E
B B
4102 Ä p.
(Close GCB in critical mode) should be
2802 Ä p. 245) is disabled.
Configuration
F
B
238). All shutdown
263