(2) Start the engine; make and record engine manufacturer's
after-starting checks and inspections during a reasonable warm-up
period.
(3) Operate the engine generator-set for at least 2 hours at 75
percent of service load.
(4) Increase load to 100%of service load and operate the engine
generator-set for at least 2 hours.
(5)
Remove load from the engine-generator set.
3.5.5.2
Load Acceptance Test
Engine manufacturer's recommended prestarting checks and inspections shall
be performed and recorded. The engine shall be started, and engine
manufacturer's after-starting checks and inspections made and recorded
during a reasonable warm-up period. For the following steps, the output
line-line and line-neutral voltages and frequency shall be recorded after
performing each step instruction (after stabilization of voltage and
frequency). Stabilization is considered to have occurred when measurements
are maintained within the specified bandwidths or tolerances, for a minimum
of four consecutive readings.
a.
Apply load in steps no larger than the Maximum Step Load Increase
to load the engine-generator set to 100 of Service Load.
b.
Verify that the engine-generator set responds to the load addition
and that the output voltage returns to and stabilizes within the
rated bandwidths.
3.5.6
Automatic Operation Tests for Stand-Alone Operation
**************************************************************************
NOTE: Substitute manual operation and transfer for
automatic operation where automatic operation is not
required by the project. Delete automatic loading
system where not required. The designer will
provide the sequence of operation (load sequences
for load acquisition and load shedding) in the
design documents.
**************************************************************************
The automatic loading system shall be tested to demonstrate [automatic
starting,] [and] [loading and unloading] of each engine-generator set. The
loads for this test shall utilize the actual loads to be served, and the
loading sequence shall be the indicated sequence. Perform this test for a
minimum of two successive, successful tests. Data taken shall include the
following:
a.
Ambient temperature (at 15 minute intervals).
b.
Generator output current (before and after load changes).
c
Generator output voltage (before and after load changes).
d.
Generator output frequency (before and after load changes.)
SECTION 16264A
Page 65
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