FALCON 7X
02-24-35
CODDE 1
PAGE 1
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DGT97831
ATA 24 – ELECTRICAL POWER
SYSTEM PROTECTIONS - SUPPLEMENTARY
INFORMATION
ISSUE 2
DASSAULT AVIATION Proprietary Data
ACTIVE PROTECTIONS
ENGINE DRIVEN GENERATOR & APU GENERATOR (GCU) PROTECTION
The engine-driven generators and the APU are each monitored by a Generator Control Unit
(GCU).
Main protection functions are:
-
Over / under voltage,
-
Differential voltage,
-
Reverse current,
-
Overcurrent,
-
Dearing sense,
-
Underspeed.
When a generator is isolated, the corresponding OFF indication is lighted on the overhead
panel and a CAS message is displayed.
BATTERIES PROTECTION
The batteries are protected against excessive charging (overcharged / overheated) by a trip
magnetic switch, which opens and disconnects the battery.
In that case, the BAT 1 and/or BAT 2 magnetic switches trip off, and a CAS message is
displayed.
Battery reverse current, overcharging and fault protection is provided in each PDCU.
RAM AIR TURBINE GENERATOR (GCU) PROTECTION
The Ram Air Turbine (RAT) is monitored by a Generator Control Unit (GCU).
Main protection functions are:
-
Over/under voltage,
-
Fault protection,
-
Under-frequency protection.
GROUND POWER SOURCE CONTROL & PROTECTION
The PDCU allow connection of external power source to the aircraft distribution system if
voltage and current are within limits.
The PDCU automatically disconnects ground power to the aircraft distribution system if
voltage or current are outside the limits range by opening GPC 1 (see figure 02-24-15-07)
and by tripping the ON-OFF toggle switch in the ground power.
