Boeing 767: APU Generator External Power & AC Bus Tie

767 APU Generator External Power & AC Bus Tie by jerome meriweather
	Auxiliary OverHead Glareshield Center Pedestal
Up to STBY Power Left to Hydrualic Right to Fuel Down to APU To View a Control's Description, MouseOver it and ... Click to "Show" - MouseDown to "Drag" - DoubleClick to "Hide"

Switches

Switches - Activate circuit to disconnect the associated Generator Drive from the engine.
Lights - Indicate associated Generator Drive oil pressure is too low for Continued operation or oil temperature is too high.

Utility Bus Switches

Switches
- ON ( switch in ) - Connects the associated Utility Bus and galley buses to the respective main AC bus if no load shed signal is present.
- OFF ( switch out ) - Disconnects the associated Utility Bus and galley buses from their respective main AC bus and resets the load shed circuitry.
OFF Light - Indicate the associated Utility Bus is unpowered, either from load shed or from turning the switch OFF.

APU GEN Switch

Switch
- ON - Closes the APU Generator field and arms the auxiliary power breaker (APB) for automatic operation.
- OFF - Opens the APU Generator field and locks the APB open.
OFF Light - Indicates the APB is locked open, either from a fault trip or from turning the APU GEN switch OFF.

EXT PWR Switch

Switch
- ON - Closes the External Power contactor (EPC), overriding the normal bus Power priorities to trip off the APU and/or engine Generators and power the AC tie bus.
- OFF - Opens the EPC, removing External Power from the AC tie bus.
AVAIL Light - Indicates acceptable External Power is plugged into the External Power receptacle(s).

GEN CONT Switches

Switches
- ON ( switch in ) - Closes the associated Generator field and arms the Generator breaker to close or open automatically.
- OFF ( switch out ) - Opens the associated Generator field and breaker and resets the automatic trip circuitry.
OFF Lights - Indicate the associated Generator breaker is open, either from automatic trip or turning the switch OFF.

Bus Tie Switches

Switch
- AUTO ( switch in) - Arms the associated AC Bus Tie breaker for automatic operation to power the AC buses.
- ISLN ( switch out) - Opens the associated AC Bus Tie breaker and resets the automatic trip circuitry.
AVAIL Light - Indicate the associated Bus Tie breaker is locked open, either from a fault trip or turning the switch OFF.

Bus OFF Lights

Indicates the associated main AC Bus is unpowered.