Milton CAT G3412 450 kW Continuous 375 kW 60 Hz Spec Sheet - Manual (Page 3)

S T A N D B Y 4 5 0 e k W
C O N T I N U O U S 3 7 5 e k W
6 0 H z
3
TECHNICAL DATA
Open Generator Set — Standby Continuous
1800 rpm/60 Hz/480 Volts DM5445 DM5446
Package Performance
Power rating ekW 450 375
Power rating @ 0.8 PF kVA 563 469
Aftercooler temperature Deg C Deg F 54 130 54 130
Fuel Consumption
100% load with fan N•m 3 /hr scf/hr 148 5507 120 4472
75% load with fan N•m 3 /hr scf/hr 116 4360 96 3576
50% load with fan N•m 3 /hr scf/hr 86 3200 72 2702
Cooling System
Ambient air temperature* Deg C Deg F 40 105 40 105
Air flow restriction (system) kPa in water 0.12 0.5 0.12 0.5
Air flow (maximum @ rated speed for
standard radiator arrangement) m 3 /min cfm 1430 50,491 1430 50,491
Engine coolant capacity with radiator L Gal 140 37 140 37
Jacket water outlet temperature Deg C Deg F 99 210 99 210
Exhaust System
Combustion air inlet flow rate N•m 3 /min scfm 29 1062 24 872
Exhaust gas stack temperature Deg C Deg F 502 936 478 892
Exhaust gas flow rate N•m 3 /min cfm 30 3124 25 2476
Exhaust flange size (internal diameter) mm in 203 8 203 8
Exhaust system backpressure
(maximum allowable) kPa in water 6.7 27 6.7 27
Heat Rejection
Low Heat Value (LHV) fuel input kW Btu/min 1484 84,410 1205 68,547
Heat rejection to jacket water
(includes oil cooler) kW Btu/min 514 29,213 437 24,869
Total heat rejection to exhaust (LHV to 25° C) kW Btu/min 359 20,431 283 16,067
Heat rejection to exhaust (LHV to 120° C) kW Btu/min 284 13,741 218 10,412
Heat rejection to A/C kW Btu/min 37 2127 15 866
Heat rejection to atmosphere from engine kW Btu/min 59 3376 48 2742
Heat rejection to atmosphere from generator kW Btu/min 29 1660 29 1660
Generator
Motor starting capability @ 30% voltage dip** kVA 928 928
Frame 592 592
Temperature rise Deg C 130 105
Emissions***
NOx g/bhp-hr 21.7 21.3
CO g/bhp-hr 1.5 1.5
HC (total) g/bhp-hr 1.4 1.9
HC (non-methane) g/bhp-hr 0.21 0.29
Exhaust O
2
(dry) % 4.0 4.0
** *Ambient capability at 200 m (660 ft) above sea level. For ambient capability at other altitudes, consult your Caterpillar dealer.
* **Assumes synchronous driver
***Emissions data measurement is consistent with those described in EPA CFR 40 PART 89 SUBPART D and ISO 8178-1 for
measuring HC, CO, CO
2
and NOx. Data shown is based on steady state engine operating conditions of 77° F, 28.43 inches HG
and fuel having a LHV of 920 BTU per cubic foot at 30.00 inches HG absolute and 32° F. Not to exceed emission data shown is
subject to instrumentation, measurement, facility and engine fuel system adjustments.
Standby — Output available with varying load for the
duration of the interruption of the normal source power.
Continuous — Output available without varying load
for an unlimited time.
Ratings are based on ISO3046/1 standard reference
conditions of 25° C (77° F) and 100 kPa (29.61 in Hg).
Ratings are based on pipeline natural gas having a LHV
(low heat value) of 36.2 mJ/N•m
3 (920 Btu/cu ft). Variations
in altitude, temperature, and gas composition from standard
conditions or the use of a three way catalyst may require
a reduction in engine horsepower.
RATING DEFINITIONS AND CONDITIONS