above low level alarm limits.
3.5.6
Performance Tests
**************************************************************************
NOTE: The onsite tests have been developed from
MIL-STD 705 methods with input from many sources
including industry. Each designer must verify the
adequacy of the tests that are needed for each
application. Modifications to these specifications
may be necessary beyond the removal of brackets.
Delete the Frequency and Voltage, Stability and
Transient Response Test and the Voltage Regulator
and Governor Range Test for general-purpose and
commercial-type applications. Perform this test
either as a factory test or a field test (delete it
from either the factory or field tests). Perform as
a field test where required to ensure system
operability using project loads. Revise the test
steps to delete steps where the Maximum Step
Increase is larger than final load to be placed on
the genset.
If possible, specify an ambient temperature for the
load run test which is typical for the average
maximum temperature. This is most strenuous
operating condition. Specify a month which
typically provides the most restrictive operating
condition.
Delete all 110% load references from testing
requirements for standby applications.
**************************************************************************
In the following tests, where measurements are to be recorded after
stabilization of an engine-generator set parameter (voltage, frequency,
current, temperature, etc.), stabilization is considered to have occurred
when measurements are maintained within the specified bandwidths or
tolerances, for a minimum of four consecutive readings. For the following
tests, if any parts are changed, or adjustments made to the generator set,
its controls, or auxiliaries, the associated tests shall be repeated.
3.5.6.1
Continuous Engine Load Run Test
Test the engine-generator set and ancillary systems at service load to
demonstrate durability; verify that heat of extended operation does not
adversely affect or cause failure in any part of the system; and check all
parts of the system. If the engine load run test is interrupted for any
reason, the entire test shall be repeated. The engine load run test shall
be accomplished principally during daylight hours, with an average ambient
temperature of [_____] degrees C degrees F, during the month of [_____].
After each change in load in the following test, measure the vibration at
the horizontal, vertical, and axial directions. Verify that the vibration
is within the allowable range. Data taken at 15 minute intervals shall
include the following:
SECTION 16263A
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