Eaton Cutler-Hammer ATVSKDA30300XSU, Instructions Manual

Page: 22 / 40

I.B. ATS-V003
Page 16
Effective 6/98
load lugs are to be repositioned to the bottom, do it at
this time before wiring the unit or making power cable
connections.
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.
With the solid steel shield removed, proceed with the
following steps (Figure 1-3):
Step 1: Disconnect the power panel from the rest of the
transfer switch by unplugging the connector
plugs (S1, S2 and S3) (Figure 4-4).
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 4-2 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 re-installation 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 3 or 4-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 4 bolts holding the mounting
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
grooves in the back of the power panel and in
the mounting bracket that keep the polyester
phase barriers in their proper positions.
Figure 4-3 Vertical Design Load Lug Assembly Shown
Mounted
!
WARNING
NOTICE
NOTICE