Control Unit.

TM 43-0156

Step

Function

Mech

Insp

(b) Install phase barriers back onto the breakers.

cont

arc chutes in accordance with appendix D-1. Refer

to table B-3-1 for list of materials.

(d) Wrap the arc chutes with PPP-C-843 cushioning.

(e) Place arc chutes into the box, three chutes per box.

(f) Isolate the arc chutes from the sides of the box

and each other by using MM-L-751 lumber (21 x 2 x 4).

(g) Seal box and mark the containers to identify contents.

(h) 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.

(i) Rack breakers into place, and block with MM-L-751

lumber (25-1/2 x 2 x 4) (17 x 2 x 4) (5-3/4 x 2 x

4) to prevent movement.

(j) Pack fuses from each cabinet as follows:

1 Wrap fuses with MIL-B-121 barrier (18 x 12) and

place in MIL-B-117 bags according to rating. Heat

seal bags. Mark bags with rating of fuses.

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

(12 x 12 x 4).

3 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.

(2)

Coat electrical contacts and terminals with

MIL-C-83360 coating compound.

(3)

Electrical Cabinet Doors. Secure breaker cabinet

doors with frame (item A, fig. B-3-1). Refer to

table B-3-2 for a list of materials.

(4)

(a) Remove a bolt from each side of the exhaust fan louvers.

(b) Place bolts into a bag fabricated from MIL-B-131

barrier. Heat seal and mark to identify contents.

Change 1

B-3-9