Milton CAT 3516C HD 2500 kW 3125 kVA 60 Hz 1800 rpm 480 Volts Generator Data - Manual (Page 10)

The generator decrement current curve gives the
symmetrical current supplied by the generator for a three
phase bolted fault at the generator terminals. Generators
equipped with the series boost attachment or generators
with PM excitation system will supply 300% of rated current
for at least 10 seconds.
E. GENERATOR EFFICIENCY CURVES
The efficiency curve is representative of the overall
generator efficiency over the normal range of the
electrical load and at the specified parameters. This is
not the overall engine generator set efficiency curve.
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