Installation
Location
The breaker should be located so that it is readily acces-
sible for manual operation and inspection. Ample clear-
ance should be provided for doors and panels to swing
open, or to be removed for servicing the breaker.
Preparation for Installation
Prior to installation of a power circuit breaker, study this
instruction book and the breaker drawings, such as out-
line, CT diagram, elementary diagram, connection diagram,
relay panel diagram and electrical bill of material, and
nameplate engraving. Special attention should be given
to the foundation information contained in this manual as
well as the information provided on the equipment draw-
ings. Be sure that the foundation conforms to the require-
ments described in this manual and the outline drawing.
SDV breakers are shipped with the legs positioned for ship-
ment. The legs must be removed, turned to the proper
position and set to the desired height. Directions are given
in the notice decal.
“X” Bracing Installation Instructions (for High Seismic
Applications Only)
Once the SDV breaker is set in place at the correct height
with the legs correctly installed, “X” bracing must be added
to each of the four sides. Figure 3 shows appropriate in-
stallation for the breaker at its highest elevation. Other
breaker heights will use a similar configuration. The brac-
ing is to run from the first hole below (nearest) the cabinet
on one leg to the bottom hole of the opposite leg. When
both braces are installed on any side of the breaker, they
form the letter “X”.
The bracing is to be attached to each leg using 1 set of 0.5
inch SAE Grade No. 5 hardware (torqued to 50-75 ft-lbs.).
The “X” bracing bars have a series of overlapping holes to
allow appropriate length adjustment. The two bars form-
ing each brace will use 2 sets of 0.5 inch SAE Grade No. 5
hardware (torqued to 50-75 ft-lbs.) installed in the overlap-
ping holes. Refer to Figure 3 for hardware requirements.
Figure 3.
“X” Bracing Installation (High Seismic Applications Only).
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