Multiquip DCA-70USI User Manual
DCA70USI
MQ POWER Series Generator
WhisperWatt™
Prime Rating — 56 kW (70 kVA)
Standby Rating — 62 kW (77 kVA)
Three-Phase, 60 Hertz, 0.8 PF
7070
STANDARD FEATURES
Heavy duty, 4-cycle, direct injection, diesel engine provides
maximum reliability.
Brushless alternator reduces service and maintenance
requirements and meets temperature rise standards for Class
H insulation systems.
Open delta excitation design provides virtually unlimited
excitation for maximum motor starting capability.
Automatic voltage regulator (AVR) provides precise regulation.
Electronic Governor Control (Crystal Sync) — maintains
frequency to within ±0.25% from no load to full load.
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 60 dB(A) at 23 feet. Fully lockable enclosure
allows safe unattended operation.
Internal fuel tank with direct reading of fuel gauge.
Seven stage powder coat paint system 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.
WHISPERWATT
Automatic start/stop control — automatically starts the
generator set during a commercial power failure when used
in conjunction with a transfer 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 water
temperature, engine oil pressure, overspeed and overcrank.
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. The GFCI receptacles
are NEMA 5-20, and the auxilillary outputs use CS6369 twistlock receptacles.
Simultaneous single and three phase power.
Voltage selector switch offers the operator a wide range of
voltages that are manually selectable. Fine tuning of the
output voltage can be accomplished by adjusting the voltage
regulator control knob to obtain the desired voltage.
EPA emissions certified - Interim Tier 3 emissions compliant.
DCA70USI — MQ POWER SERIES GENERATOR — REV. #8 (04/17/12)
DCA70USI
MQ POWER Series Generator
SPECIFICATIONS
Generator Specifications
Design
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
3Ø Voltage (L-L/L-N)
Voltage Selector Switch at 3Ø 480/277
1Ø Voltage (L-L/L-N)
(Voltage Selector Switch at 1Ø 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
Frequency Regulation: Steady State
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
Displacement 183.0 in
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
Revolving field, self-ventilated
Drip-proof, single bearing
208Y/120, 220Y/127,
240Y/139
416Y/240, 440Y/254,
480Y/277
N/A 240/120
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.
4-cycle, water cooled,
direct injection, turbocharged
3
(2999 cc)
N/A
N/A
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 m3/min)
Maximum Air Cleaner Restriction 25 in. H
Alternator Cooling Air 526 cfm (14.9 m
Radiator Cooling Air 2009 cfm (56.9 m
O (6.25 kPa)
2
3
/min)
3
/min)
Exhaust System
Gas Flow (full load) 332 cfm (9.4 m3/min)
Gas Temperature 932°F (500°C)
Maximum Back Pressure 53.2 in. H
O (13.3 kPa)
2
Amperage
Rated Voltage Maximum Amps
1Ø 120 Volt
1Ø 240 Volt
155.4 Amps (4 wire)
168A x 2 (Zigzag)
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
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, 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.
DCA70USI — MQ POWER SERIES GENERATOR — REV. #8 (04/17/12)
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