Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
61/346
Alarms and shutdowns
Fig. 7: Low lubricating pressure
Note: For SAB 157 HR, the alarm delay is 120 seconds, and the shutdown delay is 180 seconds.
Fig. 8: Insufficient main oil pressure during low differential pressure
Note: For SAB 120-151, SAB 193-355, SAB 193 H-355 H and SAB 273 S, the main oil pressure low limit
is 1.0 bar.
A
B
P oil - 1.1 x
P suct - < lim A
Yes
Yes
No
No
No
Low lubricating
pressure
Low lubricating pressure
ALARM
SHUTDOWN
Reset
t33 = 0
t33 > 120 sec
t33 = 120 sec fixed
t33 > 25 sec
P oil = Absolute oil pressure
P suct = Absolute suct. pressure
Lim A = Shutdown for low pressure
Yes
t33 + 1
B
C
P oil > [1.5 x
P suct ] + 1.0 bar
No
No
Yes
No
Insufficient main oil
pressure shutdown
Yes
SHUTDOWN
No
Yes
Allow load
Reset
t36 = 0
Sv < 40%
Sv > 50%
Inhibit
load
Force
unload
Yes
t36 > 3 min
t36 + 1
To Next Page
Loading...
