Certified for US EPA-Tier 2 / Constant Speed
Standard Model [1250kWe/60Hz]
MITSUBISHI
S12R-Y2PTAW-1
SPECIFICATION SHEET
DIESEL ENGINES
GENERAL ENGINE DATA
Type
4-Cycle, Water Cooled
Aspiration
Turbo-Charged, Inter Cooler
(Fresh water to Cooler)
Cylinder Arragement
60
o
V
No.of Cylinders
12
Bore mm(in.)
170
(6.69)
Stroke mm(in.)
180
(7.09)
Displacement liter(in
3
)
49.03
(2992)
Compression Ratio
14.5:1
Dry Weight - Engine only - kg(lb)
5270
(11620)
Wet Weight - Engine only - kg(lb)
5555
(12249)
PERFORMANCE DATA
Steady State Speed Stability Band at any Constant Load
Electric Governor - %
±0.25 or better
Maximum Overspeed Capacity - rpm
2100
Moment of inertia of Rotating Components - kgf
・
m
2
(lbf
・
ft
2
)
75.3
(1787.2)
(Includes Std.Flywheel)
Cyclic Speed Variation with Flywheel at 1800rpm
1/576
ENGINE MOUNTING
Maximum Bending Moment at Rear Face of Flywheel Housing - kgf
・
m(lbf
・
ft)
450
(3255.6)
AIR INLET SYSTEM
Maximum Intake Air Restriction (Includes piping)
With Clean Filter Element - mm H
2
O (in.H
2
O)
400
(15.7)
With Dirty Filter Element - mm H
2
O (in.H
2
O)
635
(25.0)
EXHAUST SYSTEM
Maximum Allowable Back Pressure - mm H
2
O (in.H
2
O)
600
(23.6)
LUBRICATION SYSTEM
Oil Pressure at ldle - kgf/cm
2
(psi)
2
〜
3
(29
〜
43)
at Rate Speed - kgf/cm
2
(psi)
5
〜
6.5 (71
〜
93)
Maximum Oil Temperature -
o
C(
o
F)
110
230
Oil Capacity of Standard Pan
High - liter (U.S.gal)
150
(40)
Low - liter (U.S.gal)
108
(28.5)
Total System Capacity (lncludes Oil Filter) - liter (U.S.gal)
180
(47.6)
Maximum Angle of lnstallation (Std. Pan)
Front Down
6.5
o
(Engine Only)
Front Up
6.5
o
Side to Side
22.5
o
COOLING SYSTEM
Coolant Capacity of Jacket (Engine only) - liter (U.S.gal)
116
(30.6)
Coolant Capacity of Air cooler (Engine only) - liter (U.S.gal)
14
(3.7)
Maximum External Friction Head at Engine Outlet - kgf/cm
2
(psi)
(For Jacket and Air Cooler)
0.35
(5.0)
Maximum Static Head of Coolant above Crankshaft Center - m(ft)
10
(32.8)
Standard Thermostat (modulating)Range of Jacket -
o
C(
o
F)
71
〜
85 (160
〜
185)
Standard Thermostat (modulating)Range of Air Cooler -
o
C(
o
F)
42
〜
55 (108
〜
131)
Maximum Coolant Temperature at Engine Outlet of Jacket -
o
C(
o
F)
98
(208)
Minimum Coolant Expansion Space - % of System Capacity
(For Jacket and Air Cooler)
10
(0.4)
Maximum Coolant Temperature at Intercooler lnlet, PTAW type -
o
C(
o
F)
45
(113)
Maximum Air Restriction on Discharge Side of Radiator and Fan - mm H
2
O(in.H
2
O)
10
(0.4)
APPLICATION : GENERATOR
Pub. No. T13-0634-E
Oct. '06 Printed in Japan
