ATR 42 Model : 400/500
DC POWER
ELECTRICAL SYSTEM
P 5
DEC 95
001
1.06
.
20
20.2 CONTROLS
GENERATION
DC GEN pb
Controls the energization of associated generator and the resetting of the protection
system after failure.
ON
(pb pressed in) Associated generator is energized and associated
generator contactor closes if the network electrical parameters are
normal.
OFF
(pb released) Associated generator is deenergized and associated
generator contactor is open. The OFF light illuminates white.
FAULT illuminates amber and the CCAS is activated in event of:
- A protection trip initiated by the associated GCU. If it is caused by a
generator underspeed, reset will be automatic. For the other cases, a
manual reset has to be performed.
- An opening of a generator contactor except if pb is selected OFF.
In both cases, the BUS TIE CONTACTOR closes and affected DC BUS is
automatically supplied form the remaining generator.
AA
1
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