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WhisperWatt DCA125USI Diesel generator

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Prime Rating — 100 kW (125 kVA)
Standby Rating — 110 kW (137 kVA)
60 Hertz

WhisperWatt DCA125SSI drawing

Performance Data
Prime Rating	100 kW	125 kVA
Standby Rating	110 kW	137 kVA
Generator RPM	1800
Voltage - Three Phase	208, 220, 240, 416, 440, 460, 480V Switchable
Voltage - Single Phase	120, 127, 139, 240, 254, 277V Switchable
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/ Zig Zag
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.)	65 dB(A)

Notice: Features and equipment specifications are subject to change without notice.

WhisperWatt DCA125SSI drawing

Standard Features:

Heavy duty, 4-cycle, direct injection, turbocharged air to air
intercooled diesel engine provides maximum reliability.
Brushless alternator reduces service and maintenance
requirements and meets temperature rise standards for Class
F insulation systems.
Open delta excitation design provides virtually unlimited
excitation for maximum motor starting capability.
Automatic voltage regulator (AVR) provides precise regulation.
Electronic Governor Control (Crystal Sync) — maintains
frequency to within ±0.25% from no load to full load.
Full load acceptance of standby nameplate rating in one step
(NFPA 110, para 5-13.2.6).
Sound attenuated, weather resistant, steel housing provides
operation at 68 dB(A) at 23 feet. Fully lockable enclosure
allows safe unattended operation.
Internal fuel tank with direct reading of fuel gauge.
Seven stage powder coat paint system provides durability
and weather protection.
Fuel/water separator removes condensation from fuel for
extended engine life. Panel mounted alarm light included.
Complete engine analog instrumentation includes DC
ammeter, oil pressure gauge, water temp. gauge, fuel
level gauge, tachometer/hour meter, preheat indicator, and
emergency shutdown monitors.
Complete generator analog instrumentation includes voltage
regulator control, ammeter phase selector switch, voltmeter
phase selector switch, AC voltmeter, AC ammeter, frequency
meter, panel light, and circuit breaker.
Automatic safety shutdown system monitors the engine oil
pressure and coolant temperature. Warning lights indicate
abnormal conditions.
Automatic start/stop control — automatically starts the
generator set during a commercial power failure when used
in conjunction with a transfer switch.
Complete power panel. Fully covered; three-phase terminals
and single phase receptacles allow fast and convenient
hookup for most applications including temporary power
boxes, tools and lighting equipment. The GFCI receptacles
are NEMA 5-20, and the auxilillary outputs use CS6369 twistlock
receptacles.
Simultaneous single and three phase power.
Voltage selector switch offers the operator a wide range of
voltages that are manually selectable. Fine tuning of the
output voltage can be accomplished by adjusting the voltage
regulator control knob to obtain the desired voltage.
EPA emissions certifi ed - Tier 3 emissions compliant.

Optional Generator Features:

Battery Charger — provides fully automatic and selfadjusting
charging to the generator's battery system.
Jacket Water Heater — for easy starting in cold weather
climates.
Special Batteries — long life batteries provide extra engine
cranking power.
Spring Isolaters — provides extra vibration protection for
standby applications.
Trailer Mounted Package — meets National Highway
Traffic Safety Administration (NHTSA) regulations. Trailer is
equipped with electronic or surge brakes with double or triple
axle confi guration.

Optional Control Features:

Emergency Stop Switch.
Audible Alarm — alerts operator of abnormal conditions.
Low Coolant Level Shutdown System — provides
protection from critically low coolant levels. Includes control
panel warning light.

Optional Fuel Cell Features:

Trailer fuel tank — a second fuel cell located in the trailer
allows for extended run time.
Subbase fuel cells (double wall) — Additional fuel cell for
extended runtime operation. Contains a leak sensor, low
fuel level switch, and a secondary containment tank. UL142
listed.
❑ 12 hours of minimum run time.
❑ 24 hours of minimum run time.

Generator Specifications
Design	Revolving field, self ventilated, drip-proof, single bearing
Number of Poles	4
Excitation	Brushless with AVR
Standby Output	110 KW (137 KVA)
Prime Output	100 KW (125 KVA)
Generator RPM	1800
Voltage - 3Ø	208, 220, 240, 416, 440, 480V Switchable
Voltage - 1Ø	120, 127, 139, 240, 254, 277V Switchable
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)	65

Engine Specifications
Make	Isuzu
Model	4HK1X
Emissions	EPA Tier 3 Certified
Starting system	Electric
Design	4-cycle, water cooled, Direct injection, Turbocharged, air-to-air intercooled
Displacement	5,193cc
No. cylinders	4
Bore	115 mm
Stroke	125 mm
Gross Engine Power Output	170.3 hp (93.9kW)
BMEP	212 psi (1458 kPa)
Piston Speed	1480 ft./min.
Compression Ratio	17.5:1
Engine Speed	1800 rpm
Overspeed Limit	2100 rpm
Oil Capacity	6.1 gal (23 L)
Battery	12V 128Ah x 1

Fuel System
Fuel Tank Capacity	169 gal (640 L)
Diesel Fuel at % of Load	gal/hr (L/hr)
100%	7.3 (27.6)
75%	5.7 (21.7)
50%	4.0 (15.1)
25%	2.4 (9.1)

Amperage
Rated Voltage	Max Amps
1Ø 120V	277.8 (4 wire) 300x2 (Zigzag)
1Ø 240V	138.9 (4 wire) 300 (Zigzag)
3Ø 240V	300 Amps
3Ø 480V	150 Amps
Main Line Circuit Breaker Rating	300 Amps
Over Current Releay Trip Set Point	152 Amps

Warranty

Isuzu:
12 months from date of purchase with unlimited hours or 24 months
from date of purchase with 2000 hours (whichever comes fi rst).
Generator:
24 months from date of purchase or 2000 hours (whichever occurs fi rst).
Trailer:
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 DCA125USI Spec Sheet

DCA125USI Operators manual

Hardy Diesel Generators

For questions or to order please call: 1-800-341-7027

WhisperWatt DCA125USI Diesel generator

Warranty