With the solid steel shield removed, proceed with the
following steps for bottom feed load termination.
Step 1: Disconnect the power panel from the rest of the
transfer switch by unplugging the connector
plugs (P1, P2, and P3) (Figures 1-2).
Step 2: Remove the bolt that bonds the neutral strap to
the rear of the enclosure, if it is in place.
Step 3: Remove the four bolts that secure the power
panel in the enclosure. Depending upon the
size of the panel, it may be advisable to have
assistance with the removal. Once the power
panel is free, carefully move it to a solid work
surface (Figure 3-1).
At this point, take the time to refer to Figure 4-1 and
become familiar with the inside rear of the enclo-
sure and the power panel mounting provisions
available for both top and bottom entry. It will facili-
tate reinstallation of the power panel.
Step 4: Remove the operating mechanism from the
front of the power panel by removing the six
bolts holding the mechanism in position. The
molded case switches or optional circuit break-
ers do not have to be removed (Figure 3-3).
The rear-mounted load lugs, dip-insulated bus bars,
standoff insulators, glass polyester phase barriers,
and metal mounting bracket are designed to be
removed as one load lug assembly (Figure 4-3).
Step 5: The load lug assembly, just mentioned, is
removed by first removing the six or eight bolts
securing the pieces of insulated bus to the
back of the power panel. The number of
mounting bolts depends upon whether 2- or 3-
pole devices are installed. Mounting bolts are
accessed through holes in the load end of the
molded case switches or optional circuit break-
ers.
Step 6: Next, remove the four bolts holding the mount-
ing bracket to the upper rear portion of the
power panel. The load lug assembly can now
be removed as one unit. Note that there are
I.B. ATS-AG03
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Effective 7/00
With the enclosed transfer switch equipment unpacked
and ready for mounting, proceed with these steps:
Step 1: The transfer switch enclosure door is hinge
mounted with removable hinge pins. To simpli-
fy the mounting procedure and avoid damaging
the door-mounted logic panel, carefully remove
the door and put it in a safe place until mount-
ing is complete.
Step 2: Install required mounting bolt anchors and the
two upper mounting bolts in the mounting
surface.
Step 3: Gently lift the enclosure and guide the elongat-
ed holes in the upper mounting flange over the
upper mounting bolts, but do not completely
tighten the bolts.
Step 4: While still supporting the enclosure, install the
two lower mounting bolts in the lower mounting
flange, but do not completely tighten. Use
shims, if required, to prevent deformation of the
enclosure when the mounting surface is distort-
ed.
Step 5: Tighten all four mounting bolts after any
required shimming is completed.
Step 6: Double check to ensure that all packing and
shipping material has been removed.
4.4 LOAD LUG LOCATION
This section applies only to the 300A-600A switches.
The load lugs for the 30-200A switch are fixed.
Transfer switch equipment is supplied as standard from
the factory with load terminal lugs at the top. If the load
lugs are to be repositioned to the bottom, do it at this
time before wiring the unit or making power cable con-
nections.
IF THE LOAD LUG LOCATION IS BEING CHANGED
ON ALREADY INSTALLED TRANSFER SWITCH
EQUIPMENT, MAKE SURE THAT THE NORMAL,
EMERGENCY AND OTHER POWER SOURCES CON-
NECTED TO THE EQUIPMENT ARE DE-ENERGIZED.
HAZARDOUS VOLTAGES ARE PRESENT INSIDE
TRANSFER SWITCH EQUIPMENT AND CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
!
WARNING
NOTICE
NOTICE
