(c)
Tag and remove each wire which goes through the current transformer. Make a note of the direction which each wire goes through the current transformer. Make a note of the position of the L and T symbols on the current transformer. Mark each wire tag as follows: 1) The unit from which the wire was removed (name and
equipment number). 2) The terminal on the unit from which the wire was removed. 3) The hole in the current transformer through which the wire
goes (left right, or center).The side of the current transformer (L or T) through which the wire goes. If the wire goes through a second current transformer, add the equipment number of the second current transformer and hole through which the wire goes.
(d)
Remove the wire which locks the bolts that attach the current transformer.
(e)
Remove the two bolts.
(f)
Remove the current transformer.
TASK 24-23-01-424-005
3. Install Current Transformer Assembly
____________________________________
A. References
(1) AMM 24-22-00/201, Electrical Power - Control
B. Access
(1)
Location Zones
212 Flight Compartment (RH Side)
119/120 Main Equipment Center
(2)
Access Panels
119BL Main Equipment Center Panel
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MAINTENANCE MANUAL
C. Procedure
S 424-007
(1) Install the current transformer as follows:
(a)
Install the current transformer with two bolts.
(b)
Lock with wire the two bolts which attach the current transformer.
CAUTION: CHECK THAT THE POWER LEADS GO THROUGH THE CORRECT HOLES IN
_______ THE CURRENT TRANSFORMER ASSEMBLY. INCORRECT INSTALLATION WILL RESULT IN CIRCUIT MALFUNCTION.
(c)
Install the power wires through the correct holes in the current transformer assembly.
(d)
Connect the electrical connector to the current transformer.
(e)
Lock with wire the electrical connector.
(f)
Close the panel.
D. If current transformer T107 was replaced, do a test as follows:
S 864-008
(1)
Supply right IDG power to both main ac buses (AMM 24-22-00/201).
S 714-009
(2)
Make sure that the lights on P5 panel that follow are off:
(a)
The Two BUS OFF lights.
(b)
The ISLN lights in the two BUS TIE switches.
(c)
The OFF light in the R GEN CONT switch.
S 864-010
(3) Remove electrical power if it is not necessary (AMM 24-22-00/201).
E. If current transformer T105 was replaced do a test as follows:
S 864-011
(1)
Supply left IDG power to both main ac buses (AMM 24-22-00/201).
S 714-012
(2)
Make sure that the lights on P5 panel that follow are off:
(a)
The two BUS OFF lights.
(b)
The ISLN lights in two BUS TIE switches.
(c)
The OFF light in L GEN CONT switch.
S 864-013
(3) Remove electrical power if it is not necessary (AMM 24-22-00/201).
F. If current transformer T106, T108, T112, T113, T116, T122, T127, or T128 was replaced do a test as follows:
S 864-014
(1) Supply external power to main ac buses (AMM 24-22-00/201).
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757 MAINTENANCE MANUAL
S 714-015
(2) Make a check as follows:
(a)
Make sure that the lights on P5 panel that follow are off: 1) The two BUS OFF lights. 2) The ISLN lights in the two BUS TIE switches.
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