L-850D/E Style 2 F-Range Series FAA Runway Threshold ...
L-850D/E Style 2 F-Range Series FAA Runway Threshold ...
L-850D/E Style 2 F-Range Series FAA Runway Threshold ...
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F-<strong>Range</strong> Type L-<strong>850D</strong>/E <strong>Style</strong> 2 Inset Lights Description<br />
4. Lamp Holder Assembly<br />
5. Optional Film Disc Cutout<br />
See Figures 2-5 and 2-6. The lamp holder assembly (2) consists of the lamp<br />
support subassembly and the optical support assembly. The lamp support<br />
subassembly is pre-assembled at the factory.<br />
An optional film disc cutout is available as an electrical bypass device in<br />
case of lamp failure. It closes an auxiliary circuit around the lamp within 15<br />
seconds after lamp failure. The film disc cutout shorts and completes the<br />
circuit when the lamp fails. This allows the other lamps to remain lighted in<br />
series-connected fixtures. It also prevents excessive volt amperes on the<br />
secondary of the isolation transformer. The film disc cutout must be<br />
replaced (if used) when the lamp is replaced. Refer to Replacing Film Disc<br />
Cutout Assembly in the Repair section.<br />
CAUTION: Do not use a film disc cutout if circuit has<br />
monitoring. This will prevent the monitoring system from<br />
functioning properly.<br />
© 2009 ADB Airfield Solutions, LLC. 96A0308E Page 2-7<br />
All rights reserved Issued 4/03
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