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WhisperWatt DCA300SSC Diesel generator


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Prime Rating: 240 kW (300kVA)
Standby Rating: 264 kW (330 kVA)
60 Hertz

WhisperWatt DCA300SSC drawing



Performance Data
Prime Rating 240 kW 300 kVA
Standby Rating 264 kW 330 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.) 73 dB(A)
Notice: Features and equipment specifications are subject to change without notice.



WhisperWatt DCA300SSC 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 264 KW (330 KVA)
Prime Output 240 KW (300 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 ±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) 73
Dry Weight 8,644 lbs. (3,920 kg)
Wet Weight 9,769 lbs. (4,430 kg)


Engine Specifications
Make Cummins
Model QSL9-G3
Emissions EPA Tier 3 Certified
Starting system Electric
Design 4-cycle, water cooled, Direct injection, Turbocharged, charge air cooled
Displacement 8900cc
No. cylinders 6
Bore 114 mm
Stroke 145 mm
Gross Engine Power Output 399 hp (297kW)
BMEP 287 psi (1979 kPa)
Piston Speed 1707 ft./min.
Compression Ratio 17.8:1
Engine Speed 1800 rpm
Overspeed Limit 2040 rpm
Oil Capacity 7.0gal (26.5 L)
Battery 150Ah X 2 (24V Systems)


Fuel System
Fuel Tank Capacity 129 gal (490 L)
Diesel Fuel at % of Load gal/hr (L/hr)
100% 19 (72)
75% 15.5 (58.6)
50% 11.1 (41.9)
25% 5.9 (22.4)


Rated Voltage Max Amps
1Ø 120V 666.7 (4 wire)
1Ø 240V 333.3 (4 wire)
3Ø 240V 722 Amps
3Ø 480V 361 Amps
Main Line Circuit Breaker Rating 800 Amps
Over Current Releay Trip Set Point 361 Amps



Cummins Engine:
12 months from date of purchase with unlimited hours.
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 DCA300SSC Spec Sheet


DCA300SSC operators manual