UFC 3-535-01
17 November 2005
15-4.3.1
Installation costs are high when considering the CCR and isolating
15-4.3.2
Poor efficiency in use of electrical power.
15-4.3.3
All components on the primary side must be insulated for full voltage.
15-4.3.4
An open-circuit anywhere on the primary side makes the entire circuit
inoperative and could damage cable insulation or the CCR.
15-4.3.5
Locating faults such as open-circuit conditions can be time-consuming and
may be difficult.
15-4.4
Series circuits are usually used for runway and taxiway lighting systems
and most steady-burning lights of approach lighting systems because they provide more
uniform intensity and better intensity control of the lights.
15-4.5
Three methods for configuring runway edge lighting series circuits are
shown in Figure 15-3.
15-5
CONSTANT CURRENT REGULATORS
The power input to the AGL circuits is controlled by the CCR to which the circuit is
connected. While the CCR produces constant current to the circuits depending on the
brightness step setting, the voltage input to the circuit varies with the actual load.
15-5.1
Basically, there are three types of constant current regulators used at
airports:
15-5.1.1
Resonant Network Circuit (a dry type using a resonant network control
system to produce output current).
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