GE Industrial Solutions Arc Vault Protection System User Manual

Page 28

Arc Vault™ Protection System

DEH-41483 Rev. 3

Equipment Installation

If terminal blocks are provided, each wire must be attached

to the correct point on the terminal block, following the

circuit identification number attached to each wire.

ANCHORING SWITCHGEAR EQUIPMENT INDOORS

Correct anchoring of the switchgear equipment to the

foundation is very important. After completion of re-

assembly of the equipment at the shipping splits, the

equipment anchoring procedure should be completed.

Anchoring By Anchor Bolts

Indoor equipment is normally secured to its final mounting

surface by anchor bolts threaded into the embedded

channel sills. The bolts were loosely threaded into place

before reassembling the equipment shipping splits and

connecting to the close-coupled transformer, if appropriate.

The anchor bolts should now be tightened with a torque of

35-40 ft-lbs.

Anchoring By Weld

An alternate method of anchoring the equipment to its

foundation is to weld the equipment to floor sills (or the

floor itself if constructed of steel). Several methods, shown

on Figure 4-7, are available to the purchaser for welding the

equipment to the channel sills.

1. The front of the equipment is attached to the embedded

channel sills (1), Figure 4-7, by two 3/16-inch fillet welds (2).

It is recommended that two welds, each 2-1/2 inches long

(min.), be used for each section to firmly tie the bottom

width post (3) to the channel sill.

2. The rear of the equipment may be anchored by one of

three procedures:

• The first method is by plug welds (4), Figure 4-7, using

the anchor bolt holes in the rear sill angle (5). The plug

weld should receive a minimum 1/2-inch bead around

the entire circumference of the anchor bolt hole.

• A second method of securing the front and rear sill

angles (5) to the channel sill (1) is the use of two linear

fillet welds (2) for each section. It is recommended that

each weld be 2-1/2 inches long (min.) with a 3/16-inch

fillet (min.).

• A third method for anchoring the rear of the equipment

is to remove the rear sill angle (5) from the switchgear

and weld the rear bottom width post (6) to the channel

sill (1). These welds (2) should, like the front welds,

have a 3/16-inch (min.) fillet and each have a

minimum length of 2-1/2 inches.