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DCA70USI — MQ POWER SERIES GENERATOR — REV. #8 (04/17/12)
DCA70USI
MQ POWER Series Generator
SPECIFICATIONS
Generator Specifications
Design
Revolving field, self-ventilated
Drip-proof, single bearing
Armature Connection Star with Neutral Zig Zag
Phase 3 Single
Standby Output 62 KW (77 KVA) 44 KW
Prime Output 56 KW (70 KVA) 40 KW
3Ø Voltage (L-L/L-N)
Voltage Selector Switch at 3Ø 240/139
208Y/120, 220Y/127,
240Y/139
N/A
3Ø Voltage (L-L/L-N)
Voltage Selector Switch at 3Ø 480/277
416Y/240, 440Y/254,
480Y/277
N/A
1Ø Voltage (L-L/L-N)
(Voltage Selector Switch at 1Ø 240/120)
N/A 240/120
Power Factor 0.8 1.0
Voltage Regulation (No load to full load) ±0.5%
Generator RPM 1800
Frequency 60 Hz
No. of Poles 4
Excitation Brushless with AVR
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 H
Sound Level dB(A) Full load at 23 feet 68
Engine Specifications
Make / Model Isuzu / BJ-4JJ1X
Emissions EPA Interim Tier 3 Certified
Starting System Electric
Design
4-cycle, water cooled,
direct injection, turbocharged
Displacement 183.0 in
3
(2999 cc)
No. cylinders 4
Bore x Stroke (mm) 95.4 x 104.9
Gross Engine Power Output 97.9 bhp (50 kW)
BMEP 204 psi (1409 kPa)
Piston Speed 1237 ft./min. (6.29 m/s)
Compression Ratio 17.5:1
Engine Speed 1800 rpm
Overspeed Limit 2100 rpm
Oil Capacity 3.96 gallons (15 liters)
Battery 12V 72Ah x 1
Fuel System
Recommended Fuel ASTM-D975-No.1 & No.2-D
Maximum Fuel Flow (per hour) 16 gallons (61 liters)
Maximum Inlet Restriction (Hg) 5.9 in. (150 mm)
Fuel Tank Capacity 103 gallons (390 liters)
Fuel Consumption gph lph
At full load 4.1 15.4
At 3/4 load 3.1 11.9
At 1/2 load 2.1 8.1
At 1/4 load 1.3 4.8
Cooling System
Fan Load 0.4 hp (0.3 kW)
Coolant Capacity (with radiator) 3.57 gallons (13.5 liters)
Coolant Flow Rate (per minute) 15.4 gallons (58.5 liters)
Heat Rejection to Coolant (per minute) 2260 Btu (2.38 MJ)
Heat Rejection to Room (per minute) 578 Btu (0.61 MJ)
Maximum Coolant Friction Head 6.1 psi (42 kPa)
Maximum Coolant Static Head 21 feet (6.4 meters)
Ambient Temperature Rating 104°F (40°C)
Air
Combustion Air 138 cfm (3.9 m
3
/min)
Maximum Air Cleaner Restriction 25 in. H
2
O (6.25 kPa)
Alternator Cooling Air 526 cfm (14.9 m
3
/min)
Radiator Cooling Air 2009 cfm (56.9 m
3
/min)
Exhaust System
Gas Flow (full load) 332 cfm (9.4 m
3
/min)
Gas Temperature 932°F (500°C)
Maximum Back Pressure 53.2 in. H
2
O (13.3 kPa)
Amperage
Rated Voltage Maximum Amps
1Ø 120 Volt
155.4 Amps (4 wire)
168A x 2 (Zigzag)
1Ø 240 Volt
77.8 Amps (4 wire)
168A (Zigzag)
3Ø 240 Volt 168 Amps
3Ø 480 Volt 84 Amps
Main Line Circuit Breaker Rating 175 Amps
Over Current Relay Trip Set Point
480V Mode Only
84 Amps
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, shock 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.
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.