MQ Power WhisperWatt DCA250SSI User manual

DCA250SSI
WhisperWatt
TM
Generator
Standard Features
■ Heavy duty, turbocharged, direct injection, 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 alternator design provides virtually
unlimited excitation for maximum motor starting capability.
■ Automatic voltage regulator (AVR) provides precise
regulation.
■ Electronic governor system maintains frequency to
±0.25%.
■ 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 fuel gauges are
standard.
■ Fuel / water separator removes condensation from fuel
for extended engine life.
■ E-Coat primer with polyurethane enamel finish coat.
■ Emergency stop switch
WhisperWattTM 250
■ Complete engine analog instrumentation includes
DC ammeter, oil pressure gauge, water temp. gauge, fuel
level gauge, tachometer/hour meter, preheat indicator,
manual engine speed control, 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
water temperature, engine oil pressure, overspeed, and
overcrank. Warning lights indicate abnormal conditions.
■ Low coolant level shutdown system provides
protection from critically low coolant levels. Includes
control panel warning light.
■ Auto start/stop control allows generator to start
automatically in the event of a commercial power failure.
■ 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.
■ EPA emissions certified - Tier 3 emissions compliant.
Prime Rating: 200 kW (250 kVA)
Standby Rating: 220 kW (275 kVA)
60 Hertz
DCA250SSI Rev 0
250

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 m3/min)
Maximum Air Cleaner Restriction 13.6 in H20 (3.4 kPa)
Alternator Cooling Air 1459 cfm (41.3 m3/min)
Radiator Cooling Air 8404 cfm (238 m3/min)
Exhaust System
Gas Flow (full load) 1261 cfm (35.7 m3/min)
Gas Temperature 1004°F (540°C)
Maximum Back Pressure 53.2 in. H20 (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.

DCA250SSI
WhisperWatt
TM
Generator
Optional Generator Features
❑ Battery charger — provides fully automatic and self-
adjusting 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 — highway legal trailer
with electronic or surge brakes with single, double, or
triple axle configuration. Extra capacity fuel tanks are
also available.
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.
Optional Control Features
❑ Audible alarm — alerts operator of abnormal
conditions.
Optional Output Connections
❑ Cam-Loks — provides quick disconnect alternative
to bolt-on connectors.
❑ Pin and Sleeve Connectors — provides industry
standard connectors for all voltage requirements.
❑ Output cable — available in any custom length and
size configuration.
Generator Output Panel
DCA250SSI Rev 0

DCA250SSI
WhisperWatt
TM
Generator
Dimensions
Your MQ Power dealer is:
© COPYRIGHT 2009, MQ POWER
Rev 0 (01-09) DCA250SSIC
Manufactured by Denyo Co.
MQ POWER
POST OFFICE BOX 6254
CARSON, CA 90749
310-537-3700 • 800-883-2551
FAX: [phone]
E-MAIL: [email protected]
WWW: mqpower.com
W
eigh
t
Dry Weight 8203 lbs (3720 kg)
Wet Weight 9305 lbs (4220 kg)
Max. Lifting Point
Capacity 14050 lbs (6373 kg)