-BAT 1, BAT 2,
-GEN 1(2), APU GEN,
-EXT PWR.
(2)
Make sure that there is a warning notice in the cockpit to tell persons not to operate the pushbutton switches on the overhead panels:
-21VU (EMER ELEC PWR),
-35VU (ELEC).
(3)
Make sure that the external power connector is not connected to the aircraft receptable EXT PWR.
(4)
Make sure that there is a warning notice on the access door 121AL to tell persons not to connect the external power connector.
(5)
Make sure that the access platforms are in position at the access doors 812 and 822.
(6)
Make sure that the access doors 812 and 822 are open.
(7)
In the avionics compartment, make sure that the access panel (13) of the AC/DC emergency power center 106VU is open.
Subtask 24-24-55-865-054
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
R 106VU AC ESS/BUS/EMER/CNTOR/SPLY 15PC C08 R 106VU AC ESS BUS/EMER/STBY/CNTOR/SPLY 10XE C06 R
4. Procedure
_________
(Ref. Fig. 402/TASK 24-24-55-991-003)
Subtask 24-24-55-420-051
A. Installation of the Contactor CAUTION : REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU
_______
CONNECT THE ELECTRICAL WIRES.
(1)
Put the contactor (2) in position on the studs (3).
(2)
Install the washers (1) and the nuts (12). Tighten the nuts.
(3)
Install the crimped lugs (10) with the shunts (11).
(4)
Install the retaining washers (9).
(5)
Install the power supply wires (8).
(6)
Install the washers (7) and the nuts (6). Tighten the nuts (6).
(7)
Remove the blanking caps from the electrical connectors.
(8)
Make sure that the electrical connectors are clean and in the correct condition.
(9) Connect the 2 electrical connectors (5). Subtask 24-24-55-865-055
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 15PC, 10XE
Subtask 24-24-55-710-051
C. Operational Tests
(1)
Do the operational test of the emergency generation system (Ref. TASK 24-24-00-710-001).
(2)
Do the operational test of the static inverter (Ref. TASK 24-28-00-710-001).
5. Close-up
________ Subtask 24-24-55-410-051
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the access panel (13) on the AC/DC emergency power center 106VU.
(3)
Close the access doors 812 and 822.
(4)
Remove the warning notice(s).
1EFF : ALL 1 24-24-55Page 414 1 1 Feb 01/99R 1 1 1CES 1
(5) Remove the access platform(s).
AC ESSENTIAL GENERATION SWITCHING - DESCRIPTION AND OPERATION
_____________________________________________________________
1. General
_______ These circuits control the supply of the AC essential distribution network. They enable:
-its normal supply in normal flight configuration,
-transfer of the supply in case of AC BUS 1 loss.
2. Component Location
__________________
(Ref. Fig. 001, 002)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF.
-------------------------------------------------------------------------------3XC CNTOR-AC ESS BUS SWITCHING 106VU 125 812 24-25-55 11XC P/BSW-ELEC/AC ESS FEED 35VU 210 831 24-25-00
3. Operation
_________
**ON A/C 001-049, 051-099, 101-105, 151-158, 201-209,
(Ref. Fig. 003)
**ON A/C 106-149, 159-199, 210-299, 301-399,
(Ref. Fig. 003A)
R **ON A/C 401-499,
R (Ref. Fig. 003B)
**ON A/C ALL
AC Essential Busbar (AC ESS BUS) and AC Sheddable Essential Busbar (AC SHED ESS BUS) are normally supplied in series from AC BUS 1 through respectively AC ESS BUS TIE CONTACTOR (3XC1) and AC SHED ESS BUS CONTACTOR (8XH). In the event of AC BUS 1 loss, AC ESS BUS is no longer supplied, which causes amber MASTER CAUT light to come on. Amber "FAULT" legend illuminates on AC ESS FEED pushbutton switch located on the ELEC panel 35VU.
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