Operations conditions of an ADB SAFEGATE LED PAPI

The ADB SAFEGATE visual approach slope indicator (PAPI) type LPLI (or L-880 (L) / L-881 (L)) is equipped with a heated front glass, the emission of light sources is effective only after the preheating period which is three minutes.

During a start-up cycle following the loss of the power supply to the current regulator following a transfer of  power sources, passage from the main power supply to the auxiliary power supply, and vice versa, the a heated front glass is systematically reactivated and the maximum switch-over time is not satisfactory.

In order to use the ADB SAFEGATE LPLI PAPI, special operating conditions must be set up.