(2)
Put blanking caps on the disconnected electrical connectors.
(3)
Loosen the captive screws (3). NOTE : Do not remove the captive screws (3) and the spring washers
____
from contactor(5).
(4)
Disengage the contactor (5) from the base (1) and remove the contactor.
Essential TR Contactor
Figure 401/TASK 24-34-55-991-001
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TASK 24-34-55-400-001
Installation of the Essential TR Contactor (3PE)
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 1.8 m (5 ft. 11 in.) R No specific Torque Wrench : range 0.00 to 1.20 m.daN R (0.00 to 9.00 lbf.ft)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-24-00-710-001 Operational Test of the Emergency Generation System 24-34-55-991-001 Fig. 401
3. Job Set-up
__________
Subtask 24-34-55-860-050
A. Aircraft Maintenance Configuration
(1)
Make sure that the access platform is in position at the access doors 812 and 822.
(2)
Make sure that the access doors 812 and 822 are open.
(3)
In the avionics compartment, make sure that the access panel of the AC/DC emergency power center 106VU and BATTERY power center 105VU are open.
Subtask 24-34-55-865-051
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
105VU ELEC/CSM/G /EV AUTO/SPLY 7XE C01
106VU CSM/G /EV/MAN/SPLY 6XE B04 R 106VU ESS TR/SPLY 4PE C01 R
122VU ELEC/CNTOR/ESS/DC BUS/TIE 3PC W26 123VU AC ESS/BUS ON/BUS 1 1XC AC12 123VU AC ESS/BUS ON/BUS 2 2XC AC01
4. Procedure
_________
(Ref. Fig. 401/TASK 24-34-55-991-001)
CAUTION : MAKE SURE THAT THE CONTACTOR LOCATING PIN IS CORRECTLY ENGAGED IN
_______ ITS RECESS LOCATED IN ONE POWER TERMINAL. THIS PREVENTS DAMAGE TO THE LOCATING PIN WHEN YOU APPLY THE TORQUE.
Subtask 24-34-55-420-050
A. Installation of the Contactor
(1)
Install the contactor (5) in position on the tapped barrels (6) of the connecting base (1).
(2)
TORQUE the captive screws (3) to between 0.27 and 0.30 m.daN (23.89 and 26.54 lbf.in).
(3)
Remove the blanking caps from the electrical connectors.
(4)
Make sure that the electrical connectors are clean and in the correct condition.
(5)
Connect the connector (4) on the contactor (5).
Subtask 24-34-55-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 3PC, 1XC, 2XC, 7XE, 4PE, 6XE Subtask 24-34-55-710-050
C. Operational Test of the Emergency Generation System
(1) Do an operational test of the Emergency Generation System (Ref. TASK 24-24-00-710-001).
5. Close-up
________ Subtask 24-34-55-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
In the avionics compartment, close the access panels of the AC/DC emergency power center 106VU and the BATTERY power center 105VU.
(3)
Close the access doors 812 and 822.
(4)
Remove the access platform(s).
DC ESSENTIAL & NORMAL GENERATION SWITCHING - DESCRIPTION AND OPERATION
______________________________________________________________________
1. General
_______
These circuits control the supply of DC normal busbars and DC essential
busbars.
They enable:
-their normal supply in normal flight configuration,
-automatic transfer in some failure conditions.
2. Component Location
__________________
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