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DCA250SSI
WhisperWatt
TM
Generator
Generator Specifications
Design
Revolving field, Self-ventilated
Drip-proof, Single bearing
No. of Poles 4-pole
Excitation Brushless with AVR
Standby Output 220 kW (275 kVA)
Prime Output 200 kW (250 kVA)
Generator RPM 1800
Voltage — 3Ø 208, 220, 240, 416, 440, 480V Reconnectable
Voltage — 1Ø 120, 127, 139, 240, 254, 277V Adjustable
Armature Connection Star with neutral
Voltage Regulation
(No load to full load)
±0.5%
Power Factor 0.8
Frequency 60 Hz
Frequency Regulation:
No Load to Full Load
Isochronous under varying loads from
no load to 100% rated load
Frequency Regulation:
Steady State
±0.25% of mean value for constant loads
from no load to full load
Insulation Class F
Sound Level dB(A)
Full load at 23 ft
68
Engine Specifications
Make/Model Isuzu / 6UZ1X
Emissions EPA Tier 3 Certified
Starting System Electric
Design
4-Cycle, Water cooled, Direct injection,
Turbocharged, Air cooled
Displacement 9839 cc
No. cylinders 6
Bore x Stroke (mm) 120 x 145
Gross Engine Power Output 348 hp (259 kW)
BMEP 252 psi (1735 kPa)
Piston Speed 1713 ft/min (8.7 m/s)
Compression Ratio 17.5 : 1
Engine Speed 1800 rpm
Overspeed Limit 2070 rpm
Oil capacity gallons (liters) 10.8 gal (41.0 L)
Battery 12V 150 Ah x 2
Fuel System
Recommended Fuel ASTM-D975-No.1 or No. 2-D
Maximum Fuel Flow (per hour) 98.8 gal (347 L)
Maximum Inlet Restriction (Hg) 8.86 in. (225 mm)
Fuel Tank Capacity 121 gal (460 L)
Fuel Consumption
full load gph (lph) 14.7 (55.8)
75% load gph (lph) 10.9 (41.2)
50% load gph (lph) 7.5 (28.5)
25% load gph (lph) 4.4 (16.6)
Amperage
Rated Voltage Maximum Amps
1Ø 120 Volt 555.5 Amps (4 wire)
1Ø 240 Volt 277.7 Amps (4 wire)
3Ø 240 Volt 601 Amps
3Ø 480 Volt 301 Amps
Main Line Circuit Breaker Rating 800 Amps
Over Current Relay Trip Set Point 301 Amps
Cooling System
Fan Load 5.6 hp (4.2 kW)
Coolant Capacity (with radiator) 14.3 gal (54.0 L)
Coolant Flow Rate (per minute) 56.8 gal. (215 L)
Heat Rejection to Coolant (per minute) 7489 Btu (7.90 MJ)
Heat Radiated to Room 2095 Btu (2.21 MJ)
Maximum Coolant Friction Head 8.1 psi (56.0 kPa)
Maximum Coolant Static Head 29.5 ft (9.0 m)
Ambient Temperature Rating 104°F (40°C)
Air
Combustion Air 498 cfm (14.1 m
3
/min)
Maximum Air Cleaner Restriction 13.6 in H
2
0 (3.4 kPa)
Alternator Cooling Air 1459 cfm (41.3 m
3
/min)
Radiator Cooling Air 8404 cfm (238 m
3
/min)
Exhaust System
Gas Flow (full load) 1261 cfm (35.7 m
3
/min)
Gas Temperature 1004°F (540°C)
Maximum Back Pressure 53.2 in. H
2
0 (13.3 kPa)
Generator is not intended for use in enclosed areas or where free flow of air is restricted.
Backfeed to a utility system can cause electrocution and/or property damage. Do not
connect to any building’s electrical system except through an approved device.
Specifications are subject to change without notice.
DCA250SSI Rev 0
Warranty*
Isuzu Engine
12 months from date of purchase with unlimited hours or 24 months
from date of purchase with 2000 hours (whichever comes first).
Generator
24 months from date of purchase or 2000 hours (whichever occurs
first).
Trailer
12 months excluding normal wear items.
*Refer to the express written, one-year limited warranty sheet for additional
information.