TM 9-6115-660-13&P
Table 1-5. Tabulated Data for Power Plants/Power Units - continued
Data
PU-798A
PU-799A
Overall length, inches (cm)
135.0 (342.9)
135.0 (342.9)
Overall width, inches (cm)
86.0 (218.4)
86.0 (218.4)
Overall height, inches (cm)
66.3 (168.4)
66.3 (168.4)
Operational weight, pounds (kg)
Shipping weight, pounds (kg)
2480 (1124.9)
2510 (1138.5)
Section III. PRINCIPLES OF OPERATION
1-13. FUNCTIONAL DESCRIPTION.
1-13.1. Power Plant Functional Description. The Power Plants are mobile. The power source for the AN/MJQ-37
power plant is two DOD Model MEP-803A, 60 Hz, Tactical Quiet, 10 kW Generator Sets. The power source for the
AN/MJQ-38 power plant is two DOD Model MEP-813A, 400 Hz, Tactical Quiet 10 kW Generator Sets. Generators for
each power plant are mounted on a single modified M103A3 2-wheel 1 1/2 ton trailer. Each generator set consists of a
liquid-cooled diesel engine, brushless generator, excitation system, speed governing system, fuel system, 24-volt direct
cu-rent starting system, control system, and malfunction protection system. The generator set has a voltage reconnection
switch that allows either of three output configurations: 120-volt, single phase, 2-wire; 120/240-volt, single phase, 3-wire; or
120/208-volt, three phase, 4-wire. Electrical power to the supported system or equipment is supplied through a switch box
assembly. The switch box assembly is connected between the two generator sets by power cables. The switch box
enables transfer of the load from one generator set to the other without interruption of power. The system or equipment
load cable may be connected to the switch box by either of two arrangements. One way is to connect a load cable to the
switch box output connector. The other way is to connect a load cable to the switch box load terminals.
1-13.2 Power Unit Functional Description. The Power Units are mobile. PU-798 and PU-798A each use one DOD
Model MEP-803A, Tactical Quiet, 60 Hz, 10 kW Generator Set. PU-799 and PU-799A each use one DOD Model MEP-
813A, Tactical Quiet, 400 Hz, 10 kW Generator Set. The generator set for each power unit is mounted on a modified
M116A3, 2-wheel, 1-ton trailer (PU-798 and PU-799) or a modified high mobility, 2-wheel trailer (PU-798A and PU-799A).
The generator sets consist of a liquid-cooled diesel engine, brushless generator, excitation system, speed governing
system, fuel system, 24-volt direct current starting system, control system, and malfunction protection system. The
generator set has a voltage reconnection switch that allows either of three output configuration,: 120-volt, single phase, 2-
wire; 120/240-volt, single phase, 3-wire; or 120/208-volt, three phase, 4-wile. System or equipment load cables are to be
connected to the load terminals on the generator set output panel.
1-14. RELATED TECHNICAL MANUALS.
Refer to Appendix A for related technical manuals and lubrication orders.
Change 2 1-9/(1-10 Blank)
