MD-11 Flight Crew Operations Manual
k
Electrical -
Controls and Displays
Elec.30.6
13. AC TIE 1/2/3 ARM/OFF Switch - blue/amber
The AC TIE switch is a momentary switch that controls the respective bus tie
relay when the system is in manual mode. Switch has no effect when the
system is in auto mode.
OFF illuminates amber when the respective bus tie relay is open and the AC
TIE switch is in the OFF position. Related buses are then isolated from the ac
tie bus.
ARM illuminates blue when the respective bus tie relay is open and the AC
TIE switch is in the ARM position. In ARM, bus tie relay is controlled
automatically by the generator control unit.
OFF and ARM extinguished indicates that the respective bus tie relay is
closed.
Switch illumination is inhibited during dual land operation.
14. DC TIE 1/3 OFF Switch - amber
The DC TIE switch is a momentary switch that controls the respective
RCCBs when the system is in the manual mode. Switch has no effect when
the system is in auto mode.
OFF illuminates amber when the respective RCCBs are open and the
generator control unit is inhibited from closing the RCCBs. Pushing switch
from the OFF position places it in the ON position and returns control to the
generator control unit. Switch position will revert to OFF if the switch is
pushed or a protective trip of the RCCBs occurs.
OFF extinguishes when the RCCBs are closed.
Switch illumination is inhibited during dual land operation.
October 02, 2006
To Next Page
Loading...