Transformer Installation

(2) If desirable to remove cable reel drums , see

TM 5-6120-250-12.

(3) Disconnect the low voltage section from the

transformer per paragraph 2-l 7 b.

b. Circuit Breakers or Compartment.

(1) If low voltage section has circuit breakers

installed, check that they are in the fully racked to the "IN"

position and tripped open.

(2) If circuit breakers are to be removed, see

paragraph 2-21 for removal.

(3) When moving low voltage section with

circuit breakers remove, the drawout tray should be

restrained in the "IN" position by inserting two 3/8 bolts

through the breaker mounting holes until the bottom

against the floor of breaker

compartment.

c. Lifting Low, Voltage Section (fig. 2-151)

(1) Loosen and remove the 8 bolts, nuts,

washers and 4 clamps that secure the low voltage section

to trailer bed 14 bolts, nuts, washers and 2 clamps per

side).

(2) Inspect and make sure all panels and doors

are closed and secured.

(3) Lifting lugs are provided on each corner of

Figure 2-14. Recommended lifting of transformer.

the base for lifting complete section. Lift the low voltage

section by means of these lifting lugs. Use cables with

2-18.

Transformer Installation

hooks and / or clevises, and a timber spacer along each-

side near the top and cable spreader heads across- the

a. Lifting Transformer (fig. 2-14).

front and rear. The spacer and cable spreader heads

(1) High voltage and low voltage sections must

keep the Cables from crushing or denting the top of

be moved away front area where transformer is to be

cabinet besides providing a more vertical lift on the lifting

mounted. Normally this will have been done when

lugs. The cable and lifting device must be capable of

transformer was removed. If not, see paragraph 2-19d

lifting

for low voltage section and paragraph 2-13 c for high

d. Moving Low Voltage Section without Hoist.

voltage section.

(1) Items needed fig. 2-15).

(2) Clear

trailer deck

of all unnecessary

(a) Four short slings with a loop on each

equipment.

end.

(3) Attach slings and

lift transformer per

(b) Four short bars about six inches long,

paragraph 2-17 c.

with a diameter which will permit them to fit through

(4) With hoist move transformer and lower it

holes in lifting lug holes on cabinet base.

into its position on trailer bed. The side with the gauges

(c)

Four lifting jacks capable of lifting

should face the operator's side. This puts the three

7700 lbs.

insulator connections of transformer towards the front of

(d) Two

metal

bars

timbers

the trailer and the four bus connections towards the rear

approximately 5 feet long and capable of lifting or

of the trailer.

supporting 7700 lbs.

(5) When transformer is on trailer deck remove

(e) Five construction roller bars 5 feet

lifting slings and hoist away from transformer.

long and all the same diameter.

(6) Insert the 8 bolts with washers and tighten

(2) Disconnect low voltage section per paragraph

the nuts hand tight.

2-1 7 b.

b. Connect to High Voltage Section. Move and

(3) Loosen and remove the 8 bolts, nuts, washers

connect high voltage section per paragraph 2-16.

and 4 clamps that secure the low voltage section to trailer

c. Connect to Low Voltage Section. Move and

bed 14 bolts, nuts, washers and 2 (clamps per side).

connect low voltage section per paragraph 2-20.

(4) Insert a six-inch long bar through hole of each

2-19. Low Voltage Section Removal

lifting lug. each end should protrude an approximately

a. Disconnect

Low

Voltage

Section

from

equal distance from lug.

Transformer

(5) Place the loop) of one end of a short sling around

(1) Clear deck of trailer of all unnecessary

one end of rod in lifting lug, and the other end loop around

equipment.

the other end of rod on opposite

2-14