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IB140058EN
Instructional Booklet
Page
12
Effective: March 2016
O&M Manual for 30-1000 Amperes
Manual Transfer Switch
4.4 Vertical Design Load Lug Location
Transfer switch equipment is supplied as standard from the fac-
tory with its 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 connections.
With the solid steel shield removed, proceed with the following
steps (Figure 4):
Step 1:
Disconnect the power panel from the rest of the transfer
switch by unplugging the connector plugs (S1, S2 and
S3) (Figure 15).
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 6).
Figure 13. Vertical Design Load Lug Assembly Shown Mounted
Step 4:
Remove the operating mechanism from the front of the
power panel by removing the six bolts holding the mech-
anism in position. The molded case switches or optional
circuit breakers do not have to be removed (Figure 8).
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 num-
ber 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 breakers.
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:
There are grooves in the back of the power panel and in the mount-
ing bracket that keep the polyester phase barriers in their proper positions.
WARNING
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.
NOTICE
AT THIS POINT, TAKE THE TIME TO REFER TO FIGURE 13 AND
BECOME FAMILIAR WITH THE INSIDE REAR OF THE ENCLOSURE
AND THE POWER PANEL MOUNTING PROVISIONS AVAILABLE FOR
BOTH TOP AND BOTTOM ENTRY. IT WILL FACILITATE RE-INSTAL-
LATION OF THE POWER PANEL.
NOTICE
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 14).
