G3412 ta – Milton CAT G3412 450 kW Continuous 375 kW 60 Hz Performance and Sound Data User Manual
Page 2
G3412 TA
GAS ENGINE TECHNICAL DATA
FUEL USAGE GUIDE
DERATE FACTOR/ENGINE TIMING vs METHANE NUMBER
<30
30
35
40
45
50
55
60
65
70
75
80 to 100
0
0/--
0/--
0/--
0/--
0/--
0/--
0/--
0/--
1.0/17
1.0/19
1.0/20
ALTITUDE DERATION FACTORS
A
130 1.00
0.96
0.93
0.89
0.86
0.83
0.79
0.76
0.73
0.70
0.68
0.65
0.62
M
120 1.00
0.98
0.94
0.91
0.87
0.84
0.81
0.78
0.75
0.72
0.69
0.66
0.63
B
110 1.00
1.00
0.96
0.92
0.89
0.86
0.82
0.79
0.76
0.73
0.70
0.67
0.64
I
100 1.00
1.00
0.98
0.94
0.91
0.87
0.84
0.80
0.77
0.74
0.71
0.68
0.66
E
90 1.00
1.00
1.00
0.96
0.92
0.89
0.85
0.82
0.79
0.76
0.73
0.70
0.67
N
80 1.00
1.00
1.00
0.98
0.94
0.90
0.87
0.83
0.80
0.77
0.74
0.71
0.68
T
70 1.00
1.00
1.00
0.99
0.96
0.92
0.88
0.85
0.82
0.78
0.75
0.72
0.69
60 1.00
1.00
1.00
1.00
0.97
0.94
0.90
0.87
0.83
0.80
0.77
0.74
0.71
(°F)
50 1.00
1.00
1.00
1.00
0.99
0.96
0.92
0.88
0.85
0.82
0.78
0.75
0.72
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
ALTITUDE (FEET ABOVE SEA LEVEL)
AFTERCOOLER HEAT REJECTION FACTORS
A
130 1.66
1.77
1.89
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
M
120 1.53
1.64
1.75
1.81
1.81
1.81
1.81
1.81
1.81
1.81
1.81
1.81
1.81
B
110 1.39
1.50
1.61
1.67
1.67
1.67
1.67
1.67
1.67
1.67
1.67
1.67
1.67
I
100 1.26
1.36
1.47
1.53
1.53
1.53
1.53
1.53
1.53
1.53
1.53
1.53
1.53
E
90 1.12
1.23
1.33
1.39
1.39
1.39
1.39
1.39
1.39
1.39
1.39
1.39
1.39
N
80 1.00
1.09
1.20
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
T
70 1.00
1.00
1.06
1.11
1.11
1.11
1.11
1.11
1.11
1.11
1.11
1.11
1.11
60 1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
(°F)
50 1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
ALTITUDE (FEET ABOVE SEA LEVEL)
FUEL USAGE GUIDE:
This table shows the derate factor required for a given fuel and what engine timing to use. Note that deration occurs as the methane number
decreases. Methane number is a scale to measure ignition and burning characteristics of various fuels. Representative values are shown below.
Methane
100.00
Ethane
44.00
Most dry pipeline natural gas has a methane number of 67 or above. The gas quality should be analyzed to
Propane
34.00
determine the percentage of each constituent and then determine the methane number. Consult the dealer or
n-Butane
10.00
factory for assistance.
Hydrogen
0.00
ALTITUDE DERATION FACTORS:
This table shows the deration required for various ambient temperatures and altitudes. Use this information to help determine actual engine
power for your site.
ACTUAL ENGINE RATING:
It is important to note that the Altitude/Temperature deration and the Fuel Usage Guide deration are not cumulative, i.e., they are not to be added
together. The same is true for the Low Energy Fuel deration (reference the Caterpillar Methane Number Program) and the Fuel Usage Guide
deration. However, the Altitude/Temperature deration and Low Energy Fuel deration are cumulative; and they must be added together in the
method shown below. To determine the actual power available, take the lowest rating between 1) and 2).
1)
(Altitude/Temperature Deration) + (Low Energy Fuel Deration)
2)
Fuel Usage Guide Deration
Note: For NA's always add the Low Energy Fuel deration to the Altitude/Temperature deration. For TA engines only add the Low Energy Fuel
deration to the Altitude/Temperature deration whenever the Altitude/Temperature deration is less than 1.0 (100%). This will give the actual rating
for the engine at the conditions specified.