Electrical: Output amperes, voltage, real and reactive power, power
factor, frequency.
Pressure:
Lube-oil.
Temperature:
Coolant.
Lube-oil.
Ambient.
a.
Perform and record engine manufacturer's recommended prestarting
checks and inspections. Include as a minimum checking of coolant
fluid, fuel, and lube-oil levels.
b.
Start the engine, make and record engine manufacturer's
after-starting checks and inspections during a reasonable warmup
period.
c.
Operate the engine generator-set for 2 hours at 75% of Service
Load.
d.
Increase load to 100% of Service Load and operate the engine
generator-set for 4 hours.
e.
For prime rated units, increase load to 110% of Service Load and
operate the engine generator-set for 2 hours.
f.
Decrease load to 100% of Service Load and operate the engine
generator-set for 2 hours or until all temperatures have
stabilized.
g.
Remove load from the engine-generator set.
3.5.6.2
Voltage and Frequency Droop Test
For the following steps, verify that the output voltage and frequency
return to and stabilize within the specified bandwidth values following
each load change. Record the generator output frequency and line-line and
line-neutral voltages following each load change.
a.
With the generator operating at no load, adjust voltage and
frequency to rated voltage and frequency.
b.
Increase load to 100% of Rated Output Capacity. Record the
generator output frequency and line-line and line-neutral voltages.
c.
Calculate the percent droop for voltage and frequency with the
following equations.
Voltage droop % = No-load volts - rated output capacity volts
------------------------------------------- x 100
Rated output capacity volts
Frequency droop % = No load hertz - rated output capacity hertz
------------------------------------------- x 100
Rated output capacity volts
SECTION 16263A
Page 82
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