Marine Installation Manual
2022-03
2-9
2 Engine Power and Speed
2.5 Power range limits
X62DF-S2.0
Overload Power Range
Line 6, Line 2 and Line 13 form the curve for the engine’s overload power limit,
as defined by
. Each component is governed by different coef
-
ficients (see
).
Table 2
-
2
Line 6 coefficients
The area above Lines 1 and 9 is the overload range. It is only permissible to op
-
erate engines in this range for a maximum duration of one hour during sea trials
and in the presence of an authorised engine builder representative.
The area between Lines 1, 5 and 6 (
), called ‘service range with
operational time limit’, is only applicable to transient conditions in diesel mode
(i.e. passing through a barred speed range, sea trial or emergency fast accelera
-
tion). The engine can only be operated in this area for limited periods of time, in
particular one hour per 24 hours.
Line no.
Range (
n/n
CMCR
)
C2
C1
C0
Line 6
0.00 - 0.40
0.000
0.600
0.000
0.40 - 0.60
0.330
0.468
0.000
0.60 - 0.96
1.110
0.000
0.000
Line 2
0.96 - 1.032
0.000
1.066
0.000
Line 13
1.032 - 1.08
0.000
0.000
1.100
