3.21.6.3
Operating Test
Upon completion of tests, show by demonstration in service that circuits,
control equipment, and lights covered by the contract are in good operating
condition. Operate each switch in the control tower lighting panels so
that each switch position is engaged at least twice. During this process,
observe lights and associated equipment to determine that each switch
controls properly corresponding circuit. Provide telephone or radio
communication between the operator and the observers. Repeat tests from
the alternate control station, from the remote control points, and again
from the local control switches on the regulators. Test each lighting
circuit by operating the lamps at maximum brightness for not less than 30
minutes. Visually examine at the beginning and at the end of this test to
ensure that the correct number of lights are burning at full brightness.
Conduct [one][_____] day and [one][_____] night operating test for the
Contracting Officer.
3.21.7
Constant Current Regulators
3.21.7.1
Visual Examination
Examine each constant current regulator to ensure that porcelain bushings
are not cracked, no shipping damage has occurred, internal and external
connections are correct, switches and relays operate freely and are not
tied or blocked, fuses, if required, are correct, and oil level of
oil-filled regulators is correct. Remove relay panel covers only for this
examination; it is not necessary to open the main tank of oil-filled
regulators. Accomplish the instructions on the plates attached to the
regulators. Replace covers tightly after completing examinations and tests.
3.21.7.2
Electric Tests
Ensure that supply voltage and input tap correspond. With load
disconnected, energize regulator and observe the open circuit protector to
ensure that it de-energizes the regulator within 3 seconds. After testing
circuits for open connections and grounds and after determining that lamps
are good and in place, apply circuit load to the regulator and measure the
voltage and current simultaneously on brightness taps. Voltmeter and
ammeter shall have an accuracy of plus or minus one percent. Record
readings and make readings during the day and night in order to obtain the
average supply voltage. Output current on each brightness tap shall be
within plus or minus 2 percent of the nameplate values after making
necessary correction in the supply voltage. Late model regulators have
automatic supply voltage correction in lieu of input taps, and output
current does not change as supply voltage varies. When output current on
tap 5 deviates from nameplate value by more than 2 percent, and regulator
is not overloaded, check internal adjustment as described on regulator
instruction plate. Since adjustment may be rather delicate, allow a
deviation of up to plus or minus 5 percent on taps 1 through 4 before
attempting to readjust the regulator.
-- End of Section --
SECTION 16522N
Page 42
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