Johnson Controls SABROE UniSAB III - Page 62

Engineering manual - UniSAB III 1.10.8
62/346
001930 en 2021.06
Alarms and shutdowns
Fig. 9: Insufficient main oil pressure during low differential pressure, SAB 157 HR
Note: For SAB 157 HR, the main oil pressure low limit is 1.0 bar.
Fig. 10: Oil circuit pressure drop
Note: For SAB 157 HR, the alarm limit is 2.7 bar.
P oil >
[1.5 x P suct ]
+ 1.1 bar
No
No
Low main oil
pressure alarm
Yes
ALARM
No
Yes
Allow load
Reset
t36 = 0
Unload
Yes
t36 > 3 min
C
P oil >
[1.5 x P suct ]
+ 1.0 bar
t36 + 1
Alarm off
B
C
D
P disch - P oil
> 2.7 bar
Yes
No
No
Yes
Low oil
pressure alarm
ALARM
T37 > 10 min.
reset
t37 = 0