Manual

STANDBY 375 ekW
CONTINUOUS 375 ekW
60 Hz
3
TECHNICAL DATA
Open Generator Set — Standby Continuous
1800 rpm/60 Hz/480 Volts DM5443 DM5444
Package Performance
Power rating ekW 375 375
Power rating @ 0.8 PF kVA 469 469
Aftercooler temperature Deg C Deg F 54 130 54 130
Fuel Consumption
100% load with fan N•m
3
/hr scf/hr 137 5141 137 5141
75% load with fan N•m
3
/hr scf/hr 108 4062 108 4062
50% load with fan N•m
3
/hr scf/hr 78 2942 78 2942
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 1429 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 36 1307 36 1307
Exhaust gas stack temperature Deg C Deg F 371 700 371 700
Exhaust gas flow rate N•m
3
/min cfm 37 3125 37 3125
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 1386 78,809 1386 78,809
Heat rejection to jacket water
(includes oil cooler) kW Btu/min 457 25,983 457 25,983
Total heat rejection to exhaust (LHV to 25° C) kW Btu/min 334 19,001 334 19,001
Heat rejection to exhaust (LHV to 120° C) kW Btu/min 220 9665 220 9665
Heat rejection to A/C kW Btu/min 64 3659 64 3659
Heat rejection to atmosphere from engine kW Btu/min 55 3152 55 3152
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 2 2
CO g/bhp-hr 1.9 1.9
HC (total) g/bhp-hr 5.4 5.4
HC (non-methane) g/bhp-hr 0.81 0.81
Exhaust O2 (dry) % 8.7 8.7
***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, CO2 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