The following instructions are for the installation of Siemens VL MG Frame breakers in a shallow/deep type
panelboards (P4, P5) as a Main. The parts provided in this kit are for connections to a 3 phase / 4 wire system.
Reference fig. 2 - To locate mounting position
of a MG Frame main breaker, measure 15”
from the top (or bottom for bottom feed applications)
of Z-rail and mark position on Z-rail. The marked position
acts as top (or bottom) of unit space for the strap assembly
as shown in fig. 6 for deep mount (P5) or fig. 7 for shallow
mount (P4).
Open the shipping box and check the contents against
the following list:
Figure 2
-2-
3.
Figure 1
Installation Instructions
4.
-3- 11-D-1020-01 REV. 0
5. Reference fig. 3 & 4 - Installing the phase connectors for left feed
applications (Flip assembly for right feed applications). Align the
three square holes in the long phase strap (item 7) over the
three snaps on the strap support barrier (item 18) and press down
latching the phase connector in place on the breaker mount.
Repeat steps for Medium phase strap (item 8). Align the
square hole in the short phase strap (item 9) with the snap
in the support barrier and press down.
NOTE: For shallow mount panels skip to step #8.
Figure 3
DEEP MOUNT (P5)
Figure 4
SHALLOW MOUNT (P4)
6. Reference fig. 5 - Attach Mounting Brackets (P5). Locate two
0.312” holes at one end of the support barrier (item 18), insert
two 1/4-20 x 1/2” screws (item 3) through the 0.312” holes
in the support barrier into the 0.228” holes in the mounting
bracket (item 11) as shown. Repeat steps for second mounting
bracket at other end and tighten.
Figure 5
7. Reference fig. 6 - Installing support barrier assembly (P5).
Locate the 0.228” diameter hole on the Z-rail 1.875”
down from the top of the unit space established in step 3.
Insert a 1/4-20 X 1/2” screw (item 2) through the top 0.312”
diameter holes on the support barrier (item 18) into the
0.228” diameter hole on the Z-rail. Repeat steps for other
three holes. Insert four 1/4-20 X 1-1/4” thread forming screws
(item 1) through the 0.312” diameter holes in the short phase
strap and into the 0.228” holes in the section bus and
tighten. Repeat steps for medium and long phase straps.
Torque screws (item 1) to values specified on rear of the
deadfront. Tighten 1/4-20 X 1/2” screws as required.
Skip to step 9.
Figure 6
Note: orientation shown for left feed. For right
feed, rotate 180 degrees.
8. Reference fig. 7 - Installing support barrier assembly (P4).
Locate the 0.228” diameter hole on each Z-rail 3.125”
down from the top of the unit space established in step 3.
insert a 1/4-20 X 1/2” screw (item 3) through the top 0.312”
diameter holes on the support barrier (item 18) into the
0.228” diameter hole on the Z-rail. Repeat steps for other
three holes. Insert four 1/4-20 X 1-1/4” thread forming screws
(item 1) through the 0.312” diameter holes in the short phase
strap and into the 0.228” holes in the section bus and
tighten. Repeat steps for medium and long phase straps.
Torque screws (item 1) to values specified on rear of the
deadfront. Tighten 1/4-20 X1/2” screws as required.
18
8
9
7
18
7
9
8
18
3
11
7
8
9
18
2 1
Figure 7
Note: orientation shown for left feed. For right
feed, rotate 180 degrees.
1
9
8
7
18
3
Lock off power supplying this equipment before working
on it.
Reference fig. 1 - Remove the (2) gutter covers, deadfront
and all cover plates.
1.
2.
DEEP MOUNT (P5)
DEEP MOUNT (P5)
SHALLOW MOUNT (P4)
NOTE: Breaker mounting brackets (Item 11) omitted in
shallow P4 Panels.
