Woodward easYgen-2000 Series User Manual page 264

Configuration
Configure Application > Automatic Run > Critical Mode
Critical mode during mains supply
Emergency power during critical
mode
Critical mode during emergency
power
264
If critical mode is enabled during mains supply (MCB is closed), the
generator will be started (if not already running) and the GCB will
be closed.
The "Critical mode" message is displayed on the display
n
screen. All shutdown alarms become warning messages.
If critical mode is disabled again, all shutdown alarms become
n
active again.
If the genset was not running before critical mode has been ena‐
bled, it will be stopped after the critical mode postrun time (param‐
eter 4102 Ä p. 238) has expired. MCB operation will be performed
according to the configured transition mode.
If there is a mains failure during critical mode, the "Emerg/Critical"
message is displayed on the display screen after the mains fail
delay time (parameter
All shutdown alarms become warning messages.
Critical mode ends before mains recovery:
n
– The emergency power operation will be continued and all
shutdown alarms become active again.
– If the mains return, the unit transfers the load from gener‐
ator supply to mains supply after the mains settling delay
expires.
Emergency power operation ends before the end of the critical
n
mode:
– The critical mode is maintained and the load is transferred
from generator supply to mains supply after the mains set‐
tling delay expires.
– If open transition mode is configured, the GCB will not be
opened to prevent a dead busbar.
– The engine remains running until the conditions for the crit‐
ical mode are no longer existent.
– If the genset was not running before critical mode has been
enabled, it will be stopped after cool down time (param‐
eter 3316 Ä p.
– The GCB will take on the same state as it has before the
critical mode has been enabled.
An emergency power operation is active (load is supplied by the
generator, GCB is closed, MCB is open). If critical mode is enabled
now, the GCB remains closed and the "Emerg/Critical" message is
displayed on the display screen. All shutdown alarms become
warning messages.
easYgen-2200/2500 | Genset Control
2800 Ä p. 245) has expired.
240) has expired.
37535B