Preservation of the Control Unit.

TM 43-0156

Step

Function

Mech

Insp

Preservation of the Control Unit.

cont

(1) Remove 21 arc chutes and phase b rriers (2000 KW

only) from the circuit breakers. The arc chutes

will be packed separately (step 2 ).

NOTE

The arc chutes are to remain installed in the 1500 KW during

shipment.

(2) Install phase barriers back onto breakers.

(3) Rack into place, block, and brace to prevent movement.

(4) Pack fuses from each cabinet as follows:

(a)

Wrap fuses with MIL-B-121 barrier and place in

MIL-B-131 bags according to rating. Heat seal

bags and mark to indicate contents.

(b)

Place bagged fuses in a PPP-B-636 fiberboard box

(8 x 12 x 3). Seal box with PPP-T-76 tape and

mark to indicate contents.

(c)

Secure each box in cabinet with MIL-T-22085 tape.

PPP-T-60, type 4, 4-inch wide tape, may be used as

a substitute.

(5) Coat electrical contacts and terminals with MIL-C-83360

coating compound.

(6) Remove relay covers and place MIL-B-121 barrier

between disk and magnets. Set the protective relay

time dial settings to zero. Secure the relay covers

with QQ-W-461 wire.

(7) Prepare a UU-T-81 tag indicating "BARRIER HAS BEEN

PLACED BETWEEN DISK AND MAGNETS OF RELAYS

- REMOVE BEFORE OPERATION."

(8) Attach tag to the start controls on the control unit.

(9) Remove retaining bolts from the doors of the control

unit. Wrap with MIL-B-121 barrier and pack in a PPP-B-

636 fiberboard box (6 x 4 x 4). Seal box with PPP-T-76

tape. Secure box in tool box on the end of the control

unit. Prepare a UU-T-81 tag indicating "RETAINING

BOLTS ARE IN TOOL BOX." Secure tag to the door with

MIL-T-22085 tape. PPP-T-60 tape may be used as a

substitute for MIL-T-22085.

Change 1

B-2-14