b.
Start the engine, make and record engine manufacturer's
after-starting checks and inspections during a reasonable warm-up
period and no load. Verify stabilization of voltage and frequency
within specified bandwidths.
c.
With the unit at no load, apply the Maximum Step Load Increase.
d.
Apply load in steps equal to the Maximum Step Load Increase until
the addition of one more step increase will exceed the Service
Load.
e.
Decrease load to the unit such that addition of the Maximum Step
Load Increase will load the unit to 100% of Service Load.
f.
Apply the Maximum Step Load Increase.
g.
Decrease load to zero percent in steps equal to the Maximum Step
Load Decrease.
h.
Repeat steps c. through g.
3.5.7
Parallel Operation Test
**************************************************************************
NOTE: Delete the generator paralleling/load sharing
test if parallel sets are not intended. This test
must be performed at a power factor other than unity
to verify proportional reactive power sharing.
**************************************************************************
Test the capability of each engine-generator set to parallel and share load
with other generator sets, individually and in all combinations. This test
must be performed with the voltage regulator and governor adjustment
settings used for the Frequency and Voltage Stability and Transient
Response test. If settings are changed during the performance of this
test, a voltage and frequency stability and transient response test must be
performed for each engine generator set using the setting utilized in this
test. During operations record load-sharing characteristics of each set in
parallel operation. Data taken shall include the following:
(1.)
Ambient temperature (at 15 minute intervals).
(2.)
Generator output current (before and after load changes).
(3.)
Generator output voltage (before and after load changes).
(4.)
Power division and exchange between generator sets.
(5.)
Real power (watts) and reactive power (vars) on each set.
3.5.7.1
Combinations
Connect each set, while operating at no load, parallel with one other set
in the system, operating at service load, until all possible
two-unit-in-parallel combinations have been achieved. Verify stabilization
of voltage and frequency within specified bandwidths and proportional
sharing of real and reactive loads. Document stabilization of voltage and
frequency within specified bandwidth, the active power division, active
SECTION 16263A
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