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.
