TM 9-6115-730-24
FIELD LEVEL MAINTENANCE
TACTICAL QUIET GENERATOR 200 kW, 50/60 Hz MEP-809A/PU-809A
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 200 kW TQG consists of a diesel engine that can
operate using diesel fuel, or aviation fuel, a brushless alternating current (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. The generator end of the TQG is
considered the rear of the generator in the following descriptions. Opening the EMCP and side access panels
gives accessibility 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. These generator sets use the same control system as the
MEP-809A and PU-809A 200 kW TQG and can operate in parallel to share an electrical load.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
ENGINE
The engine for the 200 kW TQG is the Caterpillar 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 regulates load
conditions. High injection pressures help to reduce fuel consumption and emissions. Precise injection timing
optimizes the engine's performance for starting, emissions, noise and fuel consumption.
The muffler/exhaust system (Figure 1, Sheet 1, Item 2) and exhaust tubing are connected to the engine exhaust
manifold. This system reduces engine exhaust noise. Exhaust gases are exhausted upward from the top of the
generator set.
TURBOCHARGER
The turbocharger (Figure 1, Sheet 1, Item 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
AIR CLEANER ASSEMBLY
The air cleaner assembly (Figure 1, Sheet 1, Item 4) is located on the left side of the engine inside the rear
access doors. The air cleaner filters intake air used for engine combustion. The air cleaner is equipped with a
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