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May 06/2005 Flight Crew Operating Manual Volume 2 REV 2 CSP 100-6
07-01-03
ELECTRICAL
ELECTRICAL SYSTEM (Cont)
EXTERNAL POWER (Cont)
Neither the engine-driven nor the APU-driven generators come online with the GPU selected ON. If they are on when the GPU is selected, they drop offline. Engine-driven generators automatically come online after engine start, but not if the GPU is selected ON. The aircraft main batteries do not have to be on to close the GPU antiflash contactor.
GPU output voltage is indicated on the SUMMARY page and on the ELECTRICAL system synoptic display. No indication of amps drawn from the GPU is provided.
With the external power cable connected, the following indications are annunciated on the ELECTRICAL synoptic display. EXT PWR symbol and line are white when AVAIL, green when selected on, and removed when disconnected. These appear whenever a GPU cable is connected to the airplane, and a voltage of greater than 5 vdc is sensed by the power monitor.
Electrical panel shown with the optional Hydraulic Motor Driven Generator (HMDG) system.
Volume 2 Flight Crew Operating Manual May 06/2005 CSP 100-6 REV 2
07-01-04
ELECTRICAL
ELECTRICAL SYSTEM (Cont)
BATTERIES
The batteries are located in the fuselage fairing aft of the left wing. During APU start, the right battery is isolated from the rest of the aircraft and provides power to the APU starter. The bus tie closes and the left battery provides power to the rest of the aircraft for emergency operation during total generator failure. They also provide power to the battery buses even when the batteries are selected off.
The standard batteries are 24 volt nickel-cadmium (NICAD) rated at 44-amp hr.
Gases produced by the main batteries are vented overboard through two tubes that extend from the battery cases.
The batteries are connected to the essential buses when the contactors are closed. When a generator is online, it is connected to the main buses and charges the battery.
When the batteries are connected on their corresponding buses in parallel with the generators, they are charged by the gen-erators.
Individual battery voltages and temperatures can be read on the ELECTRICAL and SUMMARY synoptic displays on the MFD.
During a total generator failure, the aircraft batteries provide power for necessary essential equipment for a limited duration.
Standby Instrument power is supplied by a dedicated 24 vdc battery. The standby instrument is activated by a separate STBY INST switch located on the ELECTRICAL power panel.
If the batteries are allowed to significantly discharge prior to bringing a generator on-line, the charging current may be large enough to result in a APU GEN OVERLOAD, or L (R) GEN OVERLOAD caution CAS message for a short time as the batteries recharge.
POWER CENTERS
The two DC power centers (left and right) provide the following functions:
-Protect the loads from abnormal electrical power quality
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本文链接地址：庞巴迪挑战者300公务机机组操作手册 Bombardier Challenger-电源(4)
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