User manual

Table Of Contents
Part B Section 12.24
12.24 ELECTRICAL SYSTEM
01 GENERAL DESCRIPTION
The main electrical system is 28V dc for the aircraft circuits. Two 24-volt batteries are
located at floor level on starboard side of the Pylon Compartment, beside the Main
Distribution Panel, supply power for the electrical systems when the generators are not
operating. Each engine drives a 28V dc generator.
Some aircraft systems are not fused but are connected directly to the aircraft batteries
through the main battery relays. The Battery Switch in the Flight Station activates these
relays. These circuits are the higher-powered circuits such as feather pump, but in all
cases the control mechanism is fused or supplied through circuit breakers.
All electrical services are controllable by the pilots, with battery starting being the norm.
The main battery switch is on the bulkhead panel behind the pilot, called the Pilot's Main
Electrical Panel. External power may be provided from battery cart.
The external power connection is located on the fuselage Port side of pylon compartment,
behind the forward wing strut.
02 PILOTS MAIN ELECTRICAL PANEL
This panel is located over the bulkhead door, behind the pilots. It contains the
voltmeter/ammeter panel, main battery switch, generator switches, and fire. Extinguisher
switches for the engines.
Stichting Catalina PH-PBY Rev No: 00
18 May, 2004 Page: 1