TM 9-6115-604-34
NAVFAC P-8-633-34
(2)
Install
(a)
Refer to Figure 10-5. Install ground fault transformer T1 00(3) and secure with lockwashers (2) and
hexagon head cap screws (1).
(b)
Make wiring connections o transformer T100 terminals as tagged. Remove and discard tags.
(c)
Reinstall cabinet A rear access panel in accordance with the Operator and Organizational Maintenance
Manual.
c.
Stepdown Transformer T1 01. Stepdown transformer Tl01 is mounted in the front section of cabinet C, on the
floor. The transformer must be completely isolated before it can be safely worked on. Once isolated, its
windings must be momentary grounded to discharge any hazardous potentials on them. Proceed as follows:
WARNING
Generator set must be shut down and MAINTENANCE LOCK-OUT switch S1OO set to
MAINTENANCE during following procedures. Failure to observe this warning may result In
death by electrocution.
WARNING
Generator set output power cable assemblies must be disconnected from output terminals
and "parked" on standoff Insulator assemblies during following procedures. Failure to do so
may result In death by electrocution.
(1)
Remove
(a)
Shut down generator set in accordance with Operator and Organizational Maintenance Manual. Be sure
MAINTENANCE LOCKOUT switch S100 has been set to MAINTENANCE.
(b)
Go into the generator compartment and remove cabinet C rear access panel in accordance with the
Operator and Organizational Maintenance Manual.
(c)
Using a hooked fiberglass rod, pull the hook on the upper end of the fuse Fl 01 out of its dip. (The lower
end of the fuse will hinge.) Refer to Figure 10-6.
(d)
Reinstall rear door to cabinet C rear access panel.
(e)
Go into the control room. Set SET POWER circuit breaker CB124 to OFF Set circuit breaker locking
beam such that CBi 24 cannot be set back to ON.
(f)
Open Cabinet C door. Using a grounding stick with a grounded metal tip, momentarily touch each terminal
of transformer T1 01 to discharge to ground any static charges on the transformer.
(g)
Refer to Figure 10-7. Remove hexagon head capscrews (1), flat washers (2), wire terminal shields (3),
lockwashers (4), spacers (5), flat washers (6), and hexagonal nuts (7) to gain access to transformer
terminal T1 01 hardware.
(h)
Tag and disconnect wires from transformer T1 01 terminals.
(i)
Remove hexagon head capscrews (8) and lockwashers (9) to remove stepdown transformer T1 01 (10).
(2)
Install
(a)
Refer to Figure 10-7. Install stepdown transformer T101 (10) and secure with lockwashers (9) and
hexagon head capscrews (8).
(b)
Make wiring connections to transformer T101 terminals as tagged. Remove and discard tags.
(c)
Install hexagonal nuts (7), flat washers (6), spacers (5), lockwashers (4), wire terminal shields (3), flat
washers (2), and hexagon head capscrews (1).
(d)
Close cabinet C door.
10-9
