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Figure 1-8. System connection diagram.
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TM-5-6120-250-12 Substation Trailer Mounted 500 KVA AC 4160-416Y/240V 208Y/120V 3 Phase 50/60 Hertz Manual
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High Voltage Cabinet
CHAPTER 2
OPERATING INSTRUCTIONS
Section I. SERVICE UPON RECEIPT OF EQUIPMENT
tightness, see that handle will operate in both high and
2-1. Unloading of New Equipment
low speed and that wheels will go up and down to their
a.
Unloading by Ramp.
full extent without binding.
(1) To unload from flatcar an end ramp
(8) Tires.  Inspect tires for cuts or other
suitable for semi-trailers and capable of supporting
damage and see that valves are installed securely and
30,000 lbs. must be used.
inflation is correct.
(2) A truck tractor for towing semi-trailers
(9) Wheel bearings. Check hubs for proper
must be used to tow trailer from flatcar. Use standard
oil level and add oil according to current Lubrication
hitching and towing procedures.
Order.
b.
Unloading with Crane.
(10)
Brakes.
Be sure all slack
(1) If it is necessary or more advisable to
adjusters are connected to cam shafts, brake chambers
unload the equipment by crane. The crane must have
are intact, emergency relief valve is secure and
at least 30,000 lb. lifting capacity.
connected to the brake chambers. Make sure air tank is
(2) Refer to paragraph 2-24 Preparation for
not damaged and securely mounted.
Hoisting Trailer for sling arrangement.
(11)
Accessories.
Check  that
ladder, ground rods and spreader bars are not damaged
2-2. Unpacking New Equipment
and are properly secured to the desk.  Inspect cable
a.
General.
The substation is a self-
reels for damage, cable ties securing cable to drums
contained mobile unit mounted on a semi-trailer.  Its
and drums are held from rotating by their bar lock.
packing is only to prevent tampering by unauthorized
b.
Substation Components.
persons while in transit.  Park trailer in the normal
(1) Inspect all hinged panels, doors and lids
manner and remove truck-tractor.
for alignment and see that they operate freely and close
b.
Unpacking. Remove protective material
securely against their gaskets. Inspect all bolted panels
from the faces of the gages on transformer, and
for all mounting bolts, broken gaskets and see that all
windows of high voltage cabinet. Cut and remove metal
are tight.
band around the top of low voltage cabinet.  These
(2) Inspect all switches and circuit breakers
bands were to secure doors only.  Cut and remove
for secure mounting and proper operation. Inspect all
metal bands, wood spacer block, and heavy paper
gages for cracks, broken glass and secure mounting.
covering cables on cable reels.  Remove all filler
(3) Inspect  transformer  for  signs  of
material from storage cabinets being careful not to
insulating oil leaks and bent or broken valves.
inadvertently dispose of spare parts. Cut wire securing
removable bar on high voltage cabinet.
CAUTION
2-3. Inspection and Servicing
Make provision so landing gear does
a.
Trailer.
not sink into soft ground. Make sure
(1) Body.  Inspect body for damage and
all doors of cabinet will open and
loose mounting bolts of equipment.
close.
(2)
Electrical wiring.  Examine all
accessible wiring for chafing, cracking and loose
2-4. Installation or Setting Up Instructions
connections.
a.
General.
Place trailer in position
(3) Wheeland lug nuts. Be sure all lug nuts
relative to its source of primary power or as situation
are present and tight.
dictates. Trailer body should be as level as possible.
(4) Springs.  Inspect the springs for sag,
Lower landing gear using crank on the right side of
broken or shifted leaves and loose mounting bolts.
trailer bed. Disconnect and remove prime mover, block
(5) Lights and reflectors. See if all lamps
wheels on one side of trailer.  Unfasten the access
light when switch of towing vehicle is in ON position.
ladder from the forward deck.  Place the ladder in
Reflectors should be secure and clean .
position and the guardrail stanchions in the holes in the
(6) Air lines.
Inspect all air lines for
deck provided for them on the operator's (left)
damage and insure all connections are made and tight.
(7) Landing gear.  Inspect mounting for
2-1

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