GENERATOR SPECIFICATIONS
TYPE ................................................................Four-pole, revolving field
ROTOR INSULATION ................................................................. Class H
STATOR INSULATION ................................................................ Class H
ADDITIONAL INSULATION ....................................... Antifungal Coating
TOTAL HARMONIC DISTORTION ...................................................<5%
TELEPHONE INTERFERENCE FACTOR (TIF) ................................<50
BEARINGS ............................................................ Prelubed and Sealed
COUPLING .................................................................. Direct Connected
LOAD CAPACITY(Standby Rating) ................................................100%
TEMPERATURE RISE .................................................................125° C
WINDING PITCH ................................................................................2/3
ROTOR ................................................................ Dynamically Balanced
VOLTAGE REGULATOR
Regulation ...................................................Digitally Controlled ± 0.25%
Sensing ....................................................................... Single or 3 Phase
Paralleling Capability ......................................................................... Yes
CONTROL PANEL
Type .......................................PowerManager Digital Control Platform
DISPLAY
AC Volts ............................................Line to Line and Line to Neutral
AC Amps ................................................................................Per line
Frequency ........................................................................10-99 Hertz
Oil Pressure ................................................ Digital Touchscreen LCD
Coolant Temperature .................................. Digital Touchscreen LCD
Fuel Level ................................................... Digital Touchscreen LCD
DC Battery Voltage ..................................... Digital Touchscreen LCD
Hour Meter - Run Time Hours .................... Digital Touchscreen LCD
Engine Speed in RPM ................................ Digital Touchscreen LCD
Generator Power kW .................................. Digital Touchscreen LCD
Power Factor ............................................... Digital Touchscreen LCD
Turbo Pressure ........................................... Digital Touchscreen LCD
Gas Pressure.............................................. Digital Touchscreen LCD
Gas Flow (CFM) ......................................... Digital Touchscreen LCD
Air Temperature (Incoming) ........................ Digital Touchscreen LCD
Gas Temperature ........................................ Digital Touchscreen LCD
Charge Air Cooler Valve Position ................ Digital Touchscreen LCD
Not in Auto ...................................................................................LED
Common Alarm ...........................................................................LED
ALARMS
High/Low Generator Voltage ....................... Digital Touchscreen LCD
High/Low Battery Voltage ........................... Digital Touchscreen LCD
High/Low Frequency ................................... Digital Touchscreen LCD
Low Oil Pressure & Prealarm ..................... Digital Touchscreen LCD
High, Low, Critical Low Fuel Level .............. Digital Touchscreen LCD
Overcrank ................................................... Digital Touchscreen LCD
Sensor Failure ............................................ Digital Touchscreen LCD
COMMUNICATION
Serial Communication RS232 and RS485
GenLink Software for PowerManager
®
Digital Control Platform
ENGINE SPECIFICATIONS
APPLICATION
& ENGINEERING DATA
Rating definitions - Standby: Applicable for supplying emergency power for the duration of the utility power outage. No overload capability is available for this rating. (All
ratings in accordance with BS5514, ISO3046 and DIN6271).
MB375
ENGINE FEATURES
ECONOMICAL POWER Microprocessor controlled bi- fuel diesel engine starts
on diesel fuel and provides power from an air/natural gas mixture ignited by
diesel injection and continuously monitored by the on board control.
LONGER ENGINE LIFE Generac heavy duty bi-fuel diesels provide long and
reliable operating life along with low emissions.
GENERAC GEAR DRIVE Generac's Gear Drive technology drives the engine
at the most economical operating point. The engine runs at 2280 rpm, which is
well below the maximum design speed. The Generac Gear Drive transmission
is constructed with heavy duty helical gears and ball bearings for quiet operation
and long life. It has been in the Generac product line for over 20 years and
several thousand units are installed and in operation today.
EMISSIONS Capable of low particulate and NOx emission levels. Unit is
registered with SCAQMD permitting program (CEP No. 414037)
HOW DOES A BI-FUEL ENGINE WORK?
The diesel engine is equipped with a metering system that feeds natural gas
into the incoming air supply. The standard diesel injection pump is used and
the injector sprays diesel fuel into the cylinder at the correct time. The diesel
fuel ignites and thus ignites the natural gas charge. Total power is derived
from a combination of natural gas and diesel as shown in the chart below.
The ratio of natural gas to diesel fuel is a function of several factors, including
load and intake air temperature. The system is programmed to avoid pre-
ignition, but should it occur due to a transient event such as sudden loading
or fuel variation, knock sensors will signal the controller to reduce the flow of
natural gas and the diesel injectors will take over to maintain engine speed
and required power level. The higher thermal efficiency of diesel engines and
the lower cost of natural gas, along with low emission levels, combine to make
the bi-fuel engine a very economical choice.
FUEL PRESSURE - NAT. GAS 2 psi MINIMUM
FUEL CONSUMPTION*
NG ft
3
/hr.
Diesel
NG ft
3
/hr.
Diesel
kW
@2 psi
gal./hr.
kw
@ 2 psi
gal.hr.
225
2355
1.8
325
3402
2.62
275
2880
2.22
375
3358
6.95
Fuel Pressure NG line 2 psi @ full load BTU Content (Min) 920 BTU/ft
3
LHV
*Note: Percentages and consumption can vary depending on air temperature and
heat content of fuel
MAKE ......................................................................Generac / Mitsubshi
MODEL ...................................................................................... 12.0DTA
CYLINDERS ............................................................................... 6 in-line
DISPLACEMENT .............................................. 11.945 Liter (729 cu. in.)
BORE .......................................................................................... 5.11 in.
STROKE ...................................................................................... 5.91 in.
COMPRESSION RATIO ................................................................16.5:1
INTAKE AIR ...................................................Turbocharged, Aftercooled
NUMBER OF MAIN BEARINGS ...........................................................7
CONNECTING RODS .....................................................6-Carbon Steel
CYLINDER HEAD ............(6) 1-Cylinder Cast Iron with Overhead Valve
PISTONS ................................................Heat Resistant Aluminum Alloy
CRANKSHAFT .................... Case Hardened, Die Forged, Carbon Steel
VALVE TRAIN
LIFTER TYPE ..................................................................................Solid
INTAKE VALVE MATERIAL .............. Stellite Faced Heat Resistant Steel
EXHAUST VALVE MATERIAL ......... Stellite Faced Heat Resistant Steel
HARDENED VALVE SEATS ................................................Replaceable
ENGINE GOVERNOR
❐
ELECTRONIC ...................................................................... Standard
FREQUENCY REGULATION, NO-LOAD TO FULL LOAD .........0.5%
STEADY STATE REGULATION ...............................................+0.25%
LUBRICATION SYSTEM
TYPE OF OIL PUMP .......................................................................Gear
OIL FILTER .............................................Bypass and Full flow, cartridge
CRANKCASE CAPACITY ................................... 31 Liters (8.2 U.S. gal.)
ENGINE SPECIFICATIONS Cont.
