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WhisperWatt DCA25USI Diesel generator

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Prime Rating: 20 kW (25 kVA)
Standby Rating: 22 kW (27.5 kVA)
60 Hertz

WhisperWatt DCA25SSI drawing

Performance Data
Prime Rating	20 kW	25 kVA
Standby Rating	22 kW	27.5 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)	±3-5 %
Sound Level (Full Load at 23 ft.)	59 dB(A)

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

WhisperWatt DCA25SSI drawing

Standard Features:

Heavy duty, 4-cycle, diesel engine provides maximum
reliability.
Brushless alternator reduces service and maintenance
requirements and meets temperature rise standards for
Class F insulation systems.
Open delta alternator design provides virtually unlimited
excitation for maximum motor starting capability.
Automatic voltage regulator (AVR) provides precise
regulation.
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 59 dB(A) at 23 feet. Fully lockable
enclosure allows safe unattended operation.
Internal fuel tank with direct reading fuel gauges.
Seven-stage powder coat paint 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, emergency
shutdown monitors, and keyed start switch.
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 water temperature. Warning lights indicate
abnormal conditions.
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. All are NEMA standard.
Simultaneous single and three phase power.
Voltage selector switch allows easy to change voltages as
your applications require.
EPA emissions certified - Interim Tier 4 emissions compliant.

Optional Generator Features:

Electronic Governor Control (Crystal Sync) — maintains
frequency to within ±0.25% from no load to full load.
Battery Charger — provides fully automatic and self-adjusting
charging to the generator's battery system.
Low Coolant Level Shutdown — provides protection from
critically low coolant levels. Includes control panel warning
light.
Jacket Water Heater — for easy starting in cold weather
climates.
Spring Isolators — provides extra vibration protection for
standby applications.
Trailer Mounted Package — highway legal trailer with electric
or surge brakes with single axle or tandem axle configuration.

Optional Control Features:

Emergency Stop Switch.
Audible Alarm — alerts operator of abnormal conditions.
Automatic Start / Stop Control — automatically starts the
generator set during a commercial power failure when used
in conjunction with a transfer switch.

Ultra-Silent Features:

Low Noise Muffler — Large capacity low noise muffl er
minimizes exhaust sound.
Soundproof Casing — The new design divides the cabinet into
three sections, separating the engine, muffl er and radiator for more
effi cient cooling and reduces noise from the engine and fans.
New Cooling System — An advanced design uses two
separate air intake systems to cool the generator. The engine
fan draws air in to cool the engine and generator housing while
a second electric fan directly cools the radiator. With less air
being drawn into the generator through each fan, considerably
less noise is produced through the top of the generator.
Environmental Design — Constructed using an integrated
environmental skid and fuel tank. This design fully contains fuel
leakage and any liquid that might leak from the engine such as
lube oil or radiator coolant. All potentially hazardous liquids are
contained without contaminating the surrounding area.

Generator Specifications
Design	Revolving field, self-ventilated, drip-proof, single bearing
Armature Connection	Star w/ Neutral	Zig Zag
Phase	3	Single
Standby Output	22 KW (27.5 KVA)	15.3 KW
Prime Output	20 KW (25 KVA)	14.4 KW
3Ø Voltage Voltage Selector Switch at 3Ø 240/139	208Y/120, 220Y/127, 240Y/139	N/A
3Ø Voltage Voltage Selector Switch at 3Ø 480/277	416Y/240, 440Y/254, 480Y/277	N/A
1Ø Voltage Voltage Selector Switch at 1Ø 240/120	N/A	240/120
Power Factor	0.8	1.0
Voltage Regulation	±0.5%
Generator RPM	1800
Frequency	60 Hz
No. of Poles	4
Excitation	Brushless with AVR
Frequency Regulation: No load to full load	3~5% under varying loads from no load to 100% rated load
Frequency Regulation: Steady State	±0.5% of mean value for constant loads from no load to full load.
Insulation	Class F
Sound Level dB(A)	59

Engine Specifications
Make	Isuzu
Model	BV-4LE2
Emissions	EPA Tier 4 Certified
Starting system	Electric
Design	4-cycle, water cooled, Direct injection
Displacement	2,179cc
No. cylinders	4
Bore	85 mm
Stroke	96 mm
Gross Engine Power Output	35.9 hp (25.5kW)
BMEP	100 psi (691 kPa)
Piston Speed	1134 ft./min.
Compression Ratio	18:1
Engine Speed	1800 rpm
Overspeed Limit	2100 rpm
Oil Capacity	2.25 gal (8.5 L)
Battery	12V 53Ah x 1

Fuel System
Fuel Tank Capacity	41.7 gal (158 L)
Diesel Fuel at % of Load	gal/hr (L/hr)
100%	1.66 (6.3)
75%	1.21 (4.6)
50%	0.85 3.2)
25%	0.58 (2.2)

Amperage
Rated Voltage	Max Amps
1Ø 120V	55.6 (4 wire) 60A x 2 (Zigzag)
1Ø 240V	27.8 (4 wire) 60A (Zigzag)
3Ø 240V	60 Amps
3Ø 480V	30 Amps
Main Line Circuit Breaker Rating	60 Amps
Over Current Releay Trip Set Point	30 Amps

Warranty

Isuzu Engine:
12 months from date of purchase with unlimited hours or 24 months
from date of purchase with 2000 hours (whichever occurs first).
Generator:
24 months from date of purchase or 2000 hours (whichever occurs
first).
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 DCA25USI Spec Sheet

DCA25USI operators manual

Hardy Diesel Generators

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

WhisperWatt DCA25USI Diesel generator

Warranty