Component Descriptions
Lights
Lights can be located on taxiways or runways either in-ground or above-ground as well as within navigational aids such as approach lights, airport beacons, or airport signage.
Elevated taxiway light [photo credit: Ted Stevens Anchorage International Airport (TSAIA)]
Elevated taxiway light at night (photo credit: TSAIA)
Elevated edge lights (photo credit: TSAIA)
In-pavement centerline (photo credit: TSAIA)
Elevated runway guard lights or “wig-wags” (photo credit: TSAIA)
Signs
Lit airport signage can be used to signal navigation of the taxiways and runways of an airport at night.
“Runway approach hold position” sign (photo credit: Denver International Airport)
Taxiway direction sign (photo credit: TSAIA)
Location sign (photo credit: TSAIA)
Taxiway direction signs (photo credit: TSAIA)
Regulators
Example of TSAIA Regulator – view from rear (photo credit: TSAIA)
Example of TSAIA Regulator – view from the front (photo credit: TSAIA)
Video with explanation of constant voltage vs. constant current (TSAIA)
Transformers
L-830 Isolation Transformer Facts
- Isolation transformers can be either 6.6A Primary/6.6A Secondary or 20A Primary/6.6A Secondary.
- 6.6/6.6 is a 1:1 ratio and 20/6.6 is a 3:1 ratio.
- 6.6/6.6 transformers are for taxiway circuits or LED runway circuits.
- 20/6.6 transformers are for runway circuits.
- 20/6.6 transformers reduce the amperage by a factor of 3, therefore if a 20/6.6 transformer is incorrectly put in a 6.6A taxiway circuit the secondary amperage will be one-third of what it should be, and the light will be extremely dim.
- 6.6/6.6 transformers are a straight 1:1 ratio, therefore if a 6.6/6.6A transformer is incorrectly put in a 20A runway circuit it will put 3X the amperage to the light fixture and will quickly burn out the lamp (it will get extremely bright for a short while).