DCA125USI3CAN
MQ POWER Ultra-Silent Series
WhisperWatt™ 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.
E-coat and powder coat paint provide 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.
dca125usi3caN — MQ POWER ultRa-silENt sERiEs — REv. #0 (06/05/13)
Tier 3 emissions compliant.
DCA125USI3CAN
Generator Specifications
Design
Revolving field, Self-ventilated
Drip-proof, Single bearing
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)
±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 feet
65
Engine Specifications
Make/Model Isuzu / 4HK1X
Emissions
EPA Tier 3 Certified
Starting System Electric
Design
4-cycle, watercooled, direct injection,
turbocharged, air to air intercooled
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
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
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
25.0 in H
2
O (6.25 kPa)
Alternator Cooling Air 1352 cfm (38.3 m
3
/min)
Radiator Cooling Air 2944 cfm (83 m
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
2
O (13.3 kPa)
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
MQ POWER Ultra-Silent Series
SPECIFICATIONS
dca125usi3caN — MQ POWER ultRa-silENt sERiEs — REv. #0 (06/05/13)
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.
NOTICE
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.
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