Section II. MOVEMENT TO NEW WORK SITE

of the low voltage output is made on the terminal board

WARNING

in top of transformer. Remove the terminal board cover

Never apply power to trailer unit

and connect terminals as shown in L winding table on

before making sure unit is grounded

transformer nameplate for the desired voltage. See

and connections are tight.

paragraph 3-12 e.

2-5. Voltage Conversion.

Voltage Ratio Change. The transformer

WARNING

is provided with a wedge-type tap changer to change

Never make voltage changes with

voltage ratio without breaking the transformer seal to

transformer

energized.

Serious

make this change, see paragraph 3-12 d.

perpersonal injury and/ or damage to

the transformer may result.

Low Voltage Change. This conversion

Section II. MOVEMENT TO NEW WORK SITE

cabinet.

2-6. Dismantling for Movement

(19)

Close and secure the two trap

Preparation for Movement.

doors underneath the low voltage cabinet in trailer bed.

(1) Push trip button (5, fig. 2-11) on main

(20)

Make sure the 3 ammeter,

breaker in low voltage cabinet.

voltmeter, heater and light switches are in off positon.

(2)

Push

trip

button

feeder

(21)

Move main and feeder breaker

breakers. 15 fig. 215)

to the full racked in position and tripped.

(3) Using switch operating handle, turn load

(22)

Close and secure both front

break switch to off. Make a sight inspection through

doors of low voltage cabinet.

window ( 1 ,fig. 2-1 ) of high voltage cabinet to make

(23):

Disconnect the ground wire

sure switch is open. Return switch operating handle to

from the ground rod and stow it.

storage cabinet.

(24)

Remove the ground rods and

(4) Place bar (4) in bracket to cover the

stow on the deck.

operating handle socket (3) and lock with padlock.

(25)

Remove guardrail and access

(5) Check and make sure power source has

ladder. Stow ladder on forward deck, guardrail and chain

been turned off to this substation.

in storage cabinet.

(6) Remove primary cables at the power

(26)

Check that all panels have been

source, and feeder lines.

replaced and doors secured on all cabinets.

(7) Remove upper and lower rear panels of

(27)

Trailer is now ready to be

the high voltage cabinet.

connected to its prime mover. Connect electrical leads

(8) Disconnect

the

three

primary

and air hose into trailer, raise the landing gear to full up

conductors from the load break switch ( 1, fig. 2-4).

position.

Disconnect the fourth conductor from ground lug (4) at

(28)

Check brake air pressure and

the left bottom .

charge system if needed. Remove wheel blocks.

(9) Until primary cable and ground wire

Movement. The trailer should be

down and out (of cabinet.

moved according to Army standards for trailers.

(10)

Close the trap door (3) and

2-7. Reinstallation After Movement

secure with its bolt. Replace cabinet bottom cover (5).

Reinstallation. Refer to paragraph 2-4,

(11)

Replace upper and lower rear

panels of high voltage cabinet.

Installation or Setting Up Instructions.

(12)

Replace primary cable on its

If Trailer is Stored or Parked.

cable reel on rear 4 of trailer and secure with tie to drum

(1) Connect the 115 VAC power cord to a

side.

115 VAC supply. Turn heaters and

(13)

Open rear doors of low voltage

lights on.

cabinet and disconnect feeder cables from the three

(2) Make sure transformer liquid is at

feed breakers .

proper level. Add dry nitrogen in gas

(14)

Replace feeder cables on their

space until the pressure reaches 3

cable reels on rear of trailer, secure with tie to drum

psi.

side, engage the drum lock bar.

NOTE

(15)

Turn light and heater switch to

Transformer stored as spares should

of! position.

be maintained in the same condition

(16)

Disconnect 115 V service from

as if in service.

Make periodic

its power source and pull cables on hangers inside left

inspections of liquid level.

Check

of right rear door of loss voltage cabinet.

pressure gage to make sure seal is

(17)

Disconnect ground wire in right

being maintained.

bottom of low voltage cabinet.

(18)

Close and secure rear doors of

2-8