MULTIQUIP WhisperWatt 125 DCA125USI Specifications

DCA125USI

Ultra-Silent Series

WhisperWatt

TM

125

Prime Rating: 100 kW (125 kVA)
Standby Rating: 110 kW (137 kVA)

60 Hertz

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 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 65 dB(A) at 23 feet. Fully lockable
enclosure allows safe unattended operation.

■

Internal fuel tank with direct reading fuel gauges are
standard.

■

Seven stage powder coat paint provides durability and
weather protection.

■

■

■

■

■

■

■

Complete engine analog instrumentation includes DC
ammeter, oil pressure gauge, water temp. gauge, fuel level
gauge, tachometer/hour meter, 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.

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.

Fuel/water separator removes condensation from fuel
for extended engine life.

EPA emissions certified - Tier 3 emissions compliant.

DCA125USI Rev 2

Specifications

DCA125USI

Ultra-Silent Series

Generator Specifications

Design

No. of Poles 4-pole

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
(No load to full load)

Power Factor 0.8

Frequency 60 Hz

Frequency Regulation:
No Load to Full Load

Frequency Regulation:
Steady State

Insulation Class F

Sound Level dB(A)
Full load at 23 feet

Revolving field, Self-ventilated

Drip-proof, Single bearing

±0.5%

Isochronous under varying loads from

no load to 100% rated load

±0.25% of mean value for constant loads

from no load to full load

65

Engine Specifications

Make/Model Isuzu / 4HK1X

Emissions EPA Tier 3 Certified

Starting System Electric

Design

Displacement 5193 cc

No. cylinders 4

Bore x Stroke (mm) 115 x 125

Gross Engine Power Output 170.3 hp (127 kW)

HP at Rated Speed 152.3 hp (113.6 kW)

BMEP 212 psi (1458 kPa)

Piston Speed 1480 ft/min (7.50 m/s)

Compression Ratio 17.5 : 1

Engine Speed 1800 rpm

Overspeed Limit 2070 rpm

Oil capacity gallons (liters) 6.1 (23.4)

Battery 12V 128 Ah x 1

4-cycle, watercooled, direct injection,

turbocharged, air to air intercooled

Fuel System

Recommended Fuel ASTM-D975-No.1 and No. 2-D

Maximum Fuel Flow (per hour) 19.0 gal (71.0 L)

Maximum Inlet Restriction (Hg) 8.9 in (225 mm)

Fuel Tank Capacity 169 gal (640 L)

Fuel Consumption gph lph

at full load 7.3 27.6

at 3/4 load 5.7 21.7

at 1/2 load 4.0 15.1

DCA125USI Rev 2

at 1/4 load 2.4 9.1

Cooling System

Fan Load 4.4 hp (3.3 kW)

Coolant Capacity (with radiator) 5.2 gal (19.7 L)

Coolant Flow Rate (per minute) 48 gal (180 L)

Heat Rejection to Coolant (per minute) 3500 Btu (3.7 MJ)

Heat Rejection from Engine (per minute) 1040 Btu (1.1 MJ)

Maximum Coolant Friction Head 6.5 psi (45.0 kPa)

Maximum Coolant Static Head 29.5 ft (9.0 m)

Ambient Temperature Rating 104°F (40°C)

Air

Combustion Air 297 cfm (8.4 m3/min)

Maximum Air Cleaner Restriction

Alternator Cooling Air 1352 cfm (38.3 m

Radiator Cooling Air 2944 cfm (83 m

25.0 in H

O (6.25 kPa)

2

3

/min)

3

/min)

Exhaust System

Gas Flow (full load) 738 cfm (20.9 m3/min)

Gas Temperature 986°F (530°C)

Maximum Back Pressure 53.2 in/H

O (13.3 kPa)

2

Amperage

Rated Voltage Maximum Amps

1Ø 120 Volt 277.8 Amps (4 wire)

1Ø 240 Volt 138.9 Amps (4 wire)

3Ø 240 Volt 300 Amps

3Ø 480 Volt 150 Amps

Main Line Circuit Breaker Rating 300 Amps

Over Current Relay Trip Set Point 152 Amps

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.

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.

Ultra-Silent Features

DCA125USI

Ultra-Silent Series

Generator Output Panel

❑

Low Noise Muffler— Large capacity low noise muffler minimizes
exhaust sound.

❑

Soundproof Casing— The new design divides the cabinet into three
sections, separating the engine, muffler and radiator for more efficient
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.

Outside Air

Electric Fan Radiator

Diesel
engine

Control

box

Outside air

Optional Control Features

❑

Audible alarm alerts operator of abnormal conditions.

Low coolant level shutdown system provides

protection from critically low coolant levels. Includes
control panel warning light.

Emergency stop switch

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, double axle
trailer with electronic or surge brakes.

Optional Output Connections

Flow of Cooling Air

AC generator

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.

DCA125USI Rev 2

Dimensions

DCA125USI

Ultra-Silent Series

Weight

Dry Weight 5689 lb (2580 kg)

Wet Weight 7012 lb (3180 kg)

Max. Lifting Point

Capacity

Manufactured by Denyo Co.

Your MQ Power dealer is:

14050 lb (6370 kg)

© COPYRIGHT 2010 MQ POWER
Rev 2 (10-10) DCA125USI

MQ POWER

POST OFFICE BOX 6254
CARSON, CA 90749
310-537-3700 • 800-883-2551
FAX: [phone]
E-MAIL: [e-mail]
WEBSITE: www.mqpower.com