GE Industrial Solutions Arc Vault Protection System User Manual
Page 28
Arc Vault™ Protection System
DEH-41483 Rev. 3
Equipment Installation
20
© 2011 General Electric All Rights Reserved
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.