200 kW TACTICAL QUIET GENERATOR SET
EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
The 200 kW Tactical Quiet Generator (TQG) is skid-mounted and is designated MEP-809A. When the 200 kW TQG is
mounted on a trailer, it is designated PU-809A. The TQG consists of a diesel engine that can operate using diesel fuel, or
aviation fuel, a brushless AC generator, a digital voltage regulator (DVR), an electronic governing system, a fuel system, a
24 Vdc cranking system, a control system, a protection system, and other devices as described below to achieve a complete
engine driven generator set. The system uses the Caterpillar C-12 engine and a Marathon generator model DOD 751 FR.
The engine is electronically controlled. The electronic control is essential to meeting U.S. Environmental Protection Agency
(USEPA) and fuel consumption requirements. All the electrical components and assemblies (including the voltage regulator)
that provide the required instrumentation and control functions are contained in the Electronic Modular Control Panel
(EMCP) located on the generator end (REAR) of the TQG as shown in figure 1, sheet 3. Opening the EMCP and side access
panels gives access to all the electrical components and essential engine components. Paralleling receptacles are used to
connect the paralleling cable between generator sets of the same family. The generator set family includes a 100 kW TQG.
The 100 kW TQG is skid-mounted and is designated MEP-807A. When the 100 kW TQG is mounted on a trailer, it is
designated PU-807A. The 100kW generator sets (MEP-807A and PU-807A) use the same control system as the 200kW
generator sets (MEP-809A and PU-809A) and can operate in parallel to share an electrical load.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
The engine for the 200 kW TQG is the Caterpillar Model C-12 engine (figure 1, sheet 1, item 1). The engine is
electronically controlled. The Engine Control Module (ECM) controls the amount of fuel that is injected by the unit
injectors. The EMCP provides frequency (speed) control, controls long and short-term stability, and accommodates load
conditions. High injection pressures help to reduce fuel consumption and emissions. Precise injection timing optimizes
engine performance for starting, emissions, noise and fuel consumption.
The muffler (2) and exhaust tubing are connected to the engine and turbocharger. This system reduces engine exhaust noise.
Exhaust gases are exhausted upward from the top of the generator set.
The turbocharger (3) is located on the right side of the engine. Powered by engine exhaust gases, the turbocharger
compresses air from the air filter to provide pressurized air to the engine for combustion.
AIR CLEANER ASSEMBLY
The air cleaner assembly (4) is located on the left side of the engine (4) inside the rear access doors. The air cleaner filters
The alternator (5) is located on the right side of the engine. The alternator maintains the batteries in a state of full charge.
The alternator also provides 24 Vdc voltage for TQG control circuits and to the NATO slave receptacle.
The radiator (6) located at the front of the TQG eliminates engine heat via circulated coolant and air. The radiator and
engine fan are the primary heat exchanger for cooling engine coolant and for turbocharged engine intake air.
The water pump (7) located on the right side of the engine circulates coolant through the engine block and radiator to cool