MI L-DTL-53133/ 1B
pf (or less) lagging static load of twice rated set current (1/ 2 per unit impedance) is
suddenly applied to the set output terminals. The output voltage shall recover to a
minimum of 95 percent of the no load voltage within 5 seconds and shall stabilize at or
above this voltage.
3.22 Voltage adjustment range. The minimum voltage adjustment range shall be:
Voltage Connection
Range
205 to 220 volts
120/ 208 V
114 to 126 volts
120 V
228 to 252 volts
240 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 3,000 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 1.10 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 84 percent.
Custodians:
Preparing activity:
Army CR4
Army CR4
Navy - MC
Air Force 99
Project 6115-0726
Review activity:
DLA - GS
5
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