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NOTE
If the ADG is not operating properly and the airplane is on battery
power only, then all electrical power may be lost after 30 minutes.
Hydraulic pump 3B will be inoperative when on battery power.
Manual deployment of the ADG handle is also required for landing, when the ADG is the only
source of AC electrical power. This ensures that the DC ESS BUS remains powered by the
BATT BUS throughout the landing rollout, when the ADG is no longer capable of generating
AC power.
ADG LAMP/UNIT Switch
The ADG auto deploy control unit may be tested using the two-position ADG LAMP/UNIT
switch, located on the ADG AUTO DEPLOY CONTROL panel.
Selecting the switch to the UNIT position tests the continuity of the uplock circuit, the three
transfer contactors, and the ADG AUTO DEPLOY CONTROL unit internal logic circuitry. Both
engine generators must be operating, and AC BUS 1 and AC BUS 2 must be powered, to
ensure a proper test.
Selecting the switch to the LAMP position checks the serviceability of the green TEST lamp
only.
ELECTRICAL
Description
Vol. 2 07−10−18
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
AIR-DRIVEN GENERATOR (ADG) (CONT'D)
ADG Operation
Figure 07−10−16
ELECTRICAL
Description
Vol. 2 07−10−19
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
AIR-DRIVEN GENERATOR (ADG) (CONT'D)
PWR TXFR OVERRIDE
With the ADG deployed, it may be possible to restore normal AC electrical power by resetting
an engine-driven generator, or by using the APU generator. If AC electrical power is restored,
the PWR TXFR OVERRIDE switch should be selected, to reset the three transfer contactors
and regain normal AC distribution. This returns the AC ESS BUS to AC BUS 1, and the 3B
hydraulic pump to normal operation.
NOTE
The ADG manual deploy handle must be stowed to allow the
transfer contactors to reset.
ELECTRICAL
Description
Vol. 2 07−10−20
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
AIR-DRIVEN GENERATOR (ADG) (CONT'D)
ADG Operation
Figure 07−10−17
DC ELECTRICAL POWER SYSTEM
Description
Four transformer-rectifier units (TRUs), two NiCad batteries, and an external DC power receptacle
supply direct current (DC) power to the DC buses. The TRUs carry the majority of the DC electrical
loads, and the batteries provide emergency power in-flight and allow the APU to be started on the
ground.
DC power is distributed to the DC buses directly from the TRUs or batteries, and from various
contactors which provide alternate sources of power.
ELECTRICAL
Description
Vol. 2 07−10−21
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
DC ELECTRICAL POWER SYSTEM (CONT'D)
Electrical power is supplied to the buses through the circuit breaker panels.
DC System Schematic
Figure 07−10−18
Monitoring of system status is done using the DC ELECTRICAL synoptic page. The aircraft DC
bus system consists of the following nine buses:
• DC BUS 1;
• DC BUS 2;
• DC ESS (Essential) BUS;
• DC EMER (Emergency) BUS;
• BATT (Battery) BUS;
• DC UTIL (Utility) BUS 1;
• DC UTIL (Utility) BUS 2;
• MAIN BATTERY DIRECT BUS; and
• APU BATTERY DIRECT BUS.
ELECTRICAL
Description
Vol. 2 07−10−22
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
DC ELECTRICAL POWER SYSTEM (CONT'D)
DC ELECTRICAL Synoptic Page
Figure 07−10−19
Components and Operation
Transformer-Rectifier Units (TRUs)
The normal sources of 28-volt DC electrical power for the DC system are the four TRUs. Each
TRU converts 115-volt AC to 28-volt DC, and supplies it to its respective DC buses. Each TRU
is rated at 100 amps.
The four TRUs are identified as:
• TRU 1;
• TRU 2;
• ESS (Essential) TRU 1; and
• ESS (Essential) TRU 2.
The TRUs supply the following buses:
• TRU 1 normally supplies DC BUS 1 and DC UTIL BUS 1;
• TRU 2 normally supplies DC BUS 2 and DC UTIL BUS 2;
• ESS TRU 1 normally supplies DC ESS BUS and DC BATT BUS; and
• ESS TRU 2 normally supplies DC ESS BUS and DC BATT BUS.
ELECTRICAL
Description
Vol. 2 07−10−23
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
DC ELECTRICAL POWER SYSTEM (CONT'D)
TRU Power Distribution System
The TRU power distribution system supplies the following buses:
　
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