UFC 3-535-01
17 November 2005
design load voltage calculated by the design engineer. An example of this calculation is
shown in Figure 15-4.
14-7.4.2.2 A correct output current, with an output voltage appreciably less than the
estimated load voltage, indicates complete or partial shorting of the load.
14-7.4.2.3 A correct output current, with an output voltage exceeding the rated load
output voltage, indicates an overload.
14-7.4.2.4 A reduced output current, with an output voltage exceeding the rated load
output voltage, indicates an overload, possibly caused by a poor connection in the load
circuit. The regulator should be de-energized immediately to prevent damage.
14-7.4.2.5 A reduced output current, with an output voltage not exceeding the rated
output voltage, indicates a faulty regulator or reduced supply voltage.
14-7.4.2.6 A zero output current, with excessive output voltage, indicates an open in
the load circuit and failure of the open-circuit protector in the regulator. The regulator
should be de-energized immediately to prevent serious damage.
14-8
LIGHTING FIXTURE INSPECTION
An inspection must be made to determine that the color, quantity, and locations of lights
meets the installation drawings. Each light must be inspected to determine that it
operates, is properly leveled and aimed, glass is not broken or cracked, and correct
lamps are installed, all according to the technical orders and manufacturer's
instructions. (See also checklists for lights, signs, and other visual aids, Tables 14-1
through 14-6.)
14-9
SYSTEM MISCELLANEOUS COMPONENTS INSPECTION
Components such as control panels, relay cabinets, or panelboards, must be visually
inspected for damage, correct connections, proper fuse and circuit breaker ratings, and
compliance with the installation drawings. (See also checklist for vault, Table 14-8.)
14-10
SYSTEM OPERATION
After components and circuits have been inspected and tested, as specified in the
preceding paragraphs, the entire system must be tested as follows:
14-10.1
Procedures
14-10.1.1
Operate each switch of the airport lighting and taxiway panel in the control
tower so each switch position is reached at least twice. During this process, observe all
lights and vault equipment to determine that each switch properly controls the
corresponding circuit.
14-10.1.2
Repeat the above test for the panel in the alternate control station (vault)
and then repeat it again, using the local control switches on the regulators.
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