Load Break Switch Removal

(10) Disconnect

the three secondary

2-13. Load Break Switch Removal

conductors at the switch connections. Identify and tag

WARNING

each conductor for easier installation of switch.

All power must he removed so that substation

(11) Across the bottom front of the switch is a

is completely de-energized before attempting

narrow insulating barrier strip (fig. 2-21. Loosen and

to remove load break switch.

Serious

remove the two screws 12, one for each end) that fasten

personnel injury and/ or damage to equipment

the barrier to the cabinet mounts.

may result.

To Remote Load Break Switch.

Disconnect Load Break Switch.

(1) The switch is mounted to the cabinet

(I)

Clear trailer deck of all unnecessary

mounting rails by five vertical bolts, nuts and washers,

equipment.

three on the left side and two on the right. The right front

(2) Check and make sure all primary power

bolt has a spacer also.

has been removed to unit if switch is being replaced in a

(2) Loosen and remove the five bolts, nuts

field installation.

and washers (the vertical ones mounting the switch frame

(3) Loosen and remove the four hex head

to the cabinet rails).

bolts and washers from the upper front hinged panel.

(3) Lift and remove switch care must be

(4) loosen and remove the three hex head

taken not to hit and break the insulating barriers when

bolts and washers from the lower front hinged panel.

removing switch and when setting it down after removal.

(5) On the rear loosen and remove the six

(4) Replace the two, barriers and their

hex head bolts, lockwashers and plain washers securing

hardware are that were removed in preceding step a(8)

each panel, upper and lower. Remove upper and lower

panels.

(6) If switch is being removed in a field

installation, disconnect the three primary conductors from

the connection clamps in the rear compartment (fig. 2-1).

(7) Disconnect the three leads from each of

the lightning arresters connected to the primary

connection clamp of switch.

(8) Loosen and remove the bolts, nuts and

washers securing the two horizontal insulating barriers

around the primary connection bar.

(9) In front swing open the upper and lower

hinged panels.

Figure 2-1. High voltage cabinet, rear upper and lower

panels removed.

Figure 2-2. High voltage cabinet, upper front panel open.

2-4