MI L-DTL-53133/ 7C
c.
The generator set shall be capable of across-the-line starting a motor rated at 1
horsepower per kW of set kW rating. The starting current rating of the motor
shall be NEMA Code F and the motor shall be loaded with a flywheel having an
inertia equal to that of the motor rotor.
3.22 Voltage adjustment range. The minimum voltage adjustment range shall be:
Frequency
Volt age Connection
Range
60 Hz
197 to 240 volts
120/ 208 V
395 to 480 volts
240/ 416 V
60 Hz
190 to 213 volts
120/ 208 V
50 Hz
50 Hz
380 to 426 volts
240/ 416 V
This voltage adjustment range shall apply for all loads between no load and rated kW, rated
power factor at rated frequency under all environmental conditions. I t shall not be possible
to adjust the voltage of a value which activates the overvoltage protective device.
3.23 Endurance. The set shall operate for 6,000 hours without critical failure at all
loads, continuous and intermittent, up to and including rated load under all of the individual
or combination of conditions specified in 3.9.1 of the general specification.
3.24 Exciter field current. With the generator temperature stabilized at normal ambient
conditions, the exciter field current shall not exceed 0.91 amperes for rated load at 60 Hz
operation.
3.25 Generator efficiency. With the generator in the 120/ 208 V connection, the rated
load efficiency of the generator shall be equal to or greater than 88 percent.
Custodians:
Preparing activity:
Army CR4
Army CR4
Navy - MC
Air Force - 99
Project 6115-0732
Review activity:
DLA - GS
6
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