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WhisperWatt DCA250SSI Diesel generator


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Prime Rating: 200 kW (250 kVA)
Standby Rating: 220 kW (275 kVA)
60 Hertz

WhisperWatt DCA220SSI drawing



Performance Data
Prime Rating 200 kW 250 kVA
Standby Rating 220 kW 275 kVA
Generator RPM 1800
Voltage - Three Phase 208, 220, 240, 416, 440, 480V Reconnectable
Voltage - Single Phase 120, 127, 139, 240, 254, 277V Adjustable
Generator Design Revolving field, Self-ventilated, Drip-proof, Single bearing
Voltage Regulation (No Load to Full Load) ±0.5 %
Power Factor 0.8
Armature Connection Star with Neutral
Excitation Brushless with AVR
No. Poles 4-pole
Frequency 60 Hz
Frequency Regulation (steady state load) ±0.25 %
Sound Level (Full Load at 23 ft.) 68 dB(A)
Notice: Features and equipment specifications are subject to change without notice.


WhisperWatt DCA220SSI drawing


Standard Features:


Optional Generator Features:


Optional Control Features:


Optional Fuel Cell Features:


Generator Specifications
Design Revolving field, self ventilated, drip-proof, single bearing
Number of Poles 4
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 / Zig Zag
Voltage Regulation ±0.5%
Power Factor 0.8
Frequency 60 Hz

Frequency Regulation:

No Load to Full Load

Isochronous under varying load from
no load to 100% 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) 68
Dry Weight 8,203 lbs. (3,720 kg)
Wet Weight 9,305 lbs. (4,220 kg)


Engine Specifications
Make Isuzu
Model 6UZ1X
Emissions EPA Tier 3 Certified
Starting system Electric
Design 4-cycle, water cooled, Direct injection, Turbocharged, air-to-air intercooled
Displacement 9839cc
No. cylinders 6
Bore 120 mm
Stroke 145 mm
Gross Engine Power Output 348 hp (259kW)
BMEP 252 psi (1735 kPa)
Piston Speed 1713 ft./min.
Compression Ratio 17.5:1
Engine Speed 1800 rpm
Overspeed Limit 2100 rpm
Oil Capacity 10.8 gal (41 L)
Battery 12V 150Ah X 2


Fuel System
Fuel Tank Capacity 121 gal (460 L)
Diesel Fuel at % of Load gal/hr (L/hr)
100% 14.7 (55.8)
75% 10.9 (41.2)
50% 7.5 (28.5)
25% 4.4 (16.6)


Rated Voltage Max Amps
1Ø 120V 555.5 (4 wire)
1Ø 240V 277.7 (4 wire)
3Ø 240V 601 Amps
3Ø 480V 301 Amps
Main Line Circuit Breaker Rating 800 Amps
Over Current Releay Trip Set Point 301 Amps



Isuzu Engine:
12 months from date of purchase with unlimited hours or 24 months
from date of purchase with 2000 hours (whichever comes first).
24 months from date of purchase or 2000 hours (whichever occurs
12 months excluding normal wear items.



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.



WhisperWatt DCA250SSI Spec Sheet


DCA250SSI operators manual