Item:
Walking Beam Type Interlock MI5444
For use with:
Siemens Energy & Automation, Inc.
Bellefontaine, OH 43311 U.S.A.
FD Frame Circuit Breakers, Types FXD6,
FXD6-A, FD6, FD6-A, HFD6, FFC, & FFF.
Motor Circuit Interrupter Type FXD6 ETI
and Molded Case Switch Type FXD6.
Page 1 of 5
Pc. No. 85151A01
Installation Instructions
customer panel is 12 Ga. use four (4) spacers.
Hazardous voltage.
Will cause death or severe
injury.
Turn off and lock out all power supplying circuit breaker or frame before
removing cover(s) or device and
while cover(s) are removed.
Replace all covers and shields before power supplying this device is
turned on.
SAFETY INSTRUCTIONS
NOTE: This instruction outlines the recommended installation procedure.
1. Turn power off supplying device before installing kit.
2. Prepare mounting panel as shown in Fig. 1
or Fig. 2.
3. Break out proper knock-out in circuit breaker
base (see Fig. 3) using screwdriver. Use
needle file to smooth opening in base to
indicated dimensions in both cases. Prevent loose plastic from entering base. Test
to see that plunger Fig. 4, item 8 moves
freely within opening.
4. Assemble support item 1, and spacers item
2, to rear of panel using screws item 3,
lockwashers item 4, and nuts item 5 supplied as shown in Fig. 4. Torque to 32 In.Lbs.[3.62 N/m].
NOTE: Spacers, each .015 in.[0.38] thick, are
provided. Use quantity of spacers indicated on
chart in upper right hand corner. Example: If
CAUTION: Malfunction of the mechanical interlock could occurr if the dimensions shown in
Figs. 1, 2 and 4 are not maintained. This could
result in property damage.
Mount the circuit breakers and the interlock
support on one single rigid panel, carefully
observing the dimensions shown in Fig. 1, 2
and 4 to insure that all interface dimensions
remain fixed during the service life of the interlock and breakers. Make certain that long unsupported mounting panel surfaces are provided with bracing to prevent flexure.
5a.Attach the rocker arm, item 6, to the support, item 1. Washers item 11 must be located
inside the support, with one on each side of the
rocker arm. Secure the rocker arm pin, item 7,
with the cotter pin, item 9.
b. Place one centering spring, item 10 between
the panel rear surface and one end of the rocker
arm. Center the spring over the applicable holes
and insert the plunger, item 8 through the rocker
arm and spring, being certain that the plunger
is oriented as shown in Fig. 4.
c. Insert a rocker arm pin through the rocker
arm and the plunger hole closest to the circuit
breaker for panel mounted breakers. Use the
hole most distant from the breaker for plug-in
mounted breakers. Secure the pin with a cotter pin.
d. Compress the installed spring by rotating
the rocker arm. Complete the assembly required for the second circuit breaker by repeating steps b and c.
Released n/a, D v1, Dec 03, 1998
Siemens Energy & Automation, Inc.
Bellefontaine, OH 43311 U.S.A.
Hazardous voltage.
Will cause death or severe
injury.
Turn off and lock out all power supplying
circuit breaker or frame before removing
cover(s) or device and while cover(s) are
removed.
Page 2 of 5
Replace all covers and shields before power
supplying this device is turned on.
Installation Instructions
INTERLOCK CHECKOUT AND AJUSTMENT.
NOTE: The mechanical interlock plungers, Fig.
4, Item 8, are actuated by cam surfaces located in the circuit breakers. Mounting panel
thickness variations, surface irregularities and
system tolerances may require the addition or
removal of spacers, Fig. 4, item 2, to adjust
interface dimensions. Step 6 will determine if
there is a requirement to add spacers. Step 7
will show if spacers should be removed.
6a. Check “ON-OFF” function of each circuit
breaker. If the “ON-OFF” operation is normal, proceed with Step 7.
b. If either circuit breaker cannot be turned
“ON”, loosen the support screws Item 3,
and install one additional spacer, Item 2.
Retorque the screws (32 In.-Lbs.[3.62 N/m]).
Repeat Step 6a. A second additional spacer
can be installed if required.
8. Recheck each circuit breaker for normal
“ON-OFF” operation.
9. Turn each circuit breaker “ON”. Confirm
that the other circuit breaker cannot be
closed.
10.LABEL: Mechanical Interlock - Peel off protective backing from adhesive labels, (2),
and attach labels to front of each circuit
breaker as shown below.
This device is equipped with a
mechanical interlock.
7. The interlock will prevent closing of one or
both of the circuit breakers, if they are
simultaneously driven to the “ON” position.
Check this function by manually synchronizing turn “ON” of both circuit breaker toggle
handles.
a. If neither breaker closes, or only one breaker
closes, proceed with Step 8.
b. If both breakers “CLOSE”, loosen the support screws, Fig. 4, Item 3, and remove one
of the spacers, Item 2. Retorque the screws
to (32 In.-Lb.[3.62 N/m]). Repeat Step 7a. A
second spacer can be removed, if required.
NOTE: Avoid unnecessary simultaneous “TURN
ON” operations, since they cause high
mechanical loading on circuit breaker and
interlock components.
Released n/a, D v1, Dec 03, 1998
Siemens Energy & Automation, Inc.
Bellefontaine, OH 43311 U.S.A.
Hazardous voltage.
Will cause death or severe
injury.
Turn off and lock out all power supplying
circuit breaker or frame before removing
cover(s) or device and while cover(s) are
removed.
Page 3 of 5
Replace all covers and shields before power
supplying this device is turned on.
Installation Instructions
REAR OF PANEL-LINE SIDE
Dimensions
D
C
Inches
[Millimeters]
B
A
1.00
[25.4]
.75
[19.0]
.59± .03
.00
[15.0±.7]
.0
2PL
.375
[9.53]
.31[7.9]
8 PL
.196[4.98] THRU
.385[9.78] X 820 CSK
2 PL
4.042
[102.67]
7.50 [190.5]
9.50 [241.3]
NOTE 1
1.50
[38.1]
1.50
[38.17]
.75
[19.0]
.75
[19.0]
Breaker Outlines
2.25
[57.2]
4.50
[114.3]
REAR OF PANEL-LOAD SIDE
BREAKERS ON
4.50 IN.[114.3] CENTERS
6.00 IN.[152.4] CENTERS
Fig. 1
NOTE 1. KLEIN-UNIBIT OR EQUIV. IS
SUITABLE FOR DRILLING
THESE HOLES.
A
B
C
D
1.273
[32.33]
2.023
[51.38]
2.546
[64.67]
4.046
[102.77]
2.25
[57.2]
3.00
[76.2]
4.50
[114.3]
6.00
[152.4]
HOLE PATTERN FOR PANEL MOUNTED CIRCUIT BREAKERS
Released n/a, D v1, Dec 03, 1998
Siemens Energy & Automation, Inc.
Bellefontaine, OH 43311 U.S.A.
Hazardous voltage.
Will cause death or severe
injury.
Turn off and lock out all power supplying
circuit breaker or frame before removing
cover(s) or device and while cover(s) are
removed.
Page 4 of 5
Replace all covers and shields before power
supplying this device is turned on.
Installation Instructions
REAR OF PANEL-LINE SIDE
Dimensions
D
.69 R
[17.5]
8 PL
C
Inches
[Millimeters]
B
A
.80
[20.3]
1.312
[33.33]
.75
[19.0]
.59± .03
.00
[15.0±.7]
.0
2PL
.375
[9.52]
4.242
[107.75]
.196[4.98] THRU
.385[9.78] X 82 0
CSK
2 PL
7.90 [200.6]
9.50 [241.3]
3.00
[76.2]
1.50
[38.1]
.44[11.2]
8 PL
NOTE 1
1.312
[33.33]
Breaker Outlines
2.25
[57.2]
4.50
[114.3]
REAR OF PANEL-LOAD SIDE
BREAKERS ON
A
B
NOTE 1. KLEIN-UNIBIT OR EQUIV. IS
SUITABLE FOR DRILLING
THESE HOLES.
C
D
1.273
2.546
2.25
4.50
[32.33]
[64.67]
[57.2]
[114.3]
2.023
4.046
3.00
6.00
6.00 IN.[152.4] CENTERS
[76.2]
[152.4]
[51.38]
[102.77]
Fig. 2
HOLE PATTERN FOR PANEL MOUNTED CIRCUIT BREAKERS
4.50 IN.[114.3] CENTERS
Released n/a, D v1, Dec 03, 1998
Siemens Energy & Automation, Inc.
Bellefontaine, OH 43311 U.S.A.
Hazardous voltage.
Will cause death or severe
injury.
Turn off and lock out all power supplying
circuit breaker or frame before removing
cover(s) or device and while cover(s) are
removed.
Page 5 of 5
Replace all covers and shields before power
supplying this device is turned on.
Pc. No. 85151A01
© Siemens Energy & Automation, Inc. 1988
Installation Instructions
REMOVE THIS KNOCK-OUT WHEN
BREAKER IS MOUNTED RIGHT OF CENTER
BREAKER OUTLINE
Dimensions
Inches
[Millimeters]
LOAD SIDE
LINE SIDE
.156
[3.96]
.520
[13.21]
Ga. NO.
Nominal
THK In.
QTY of
spacers
10
0.135
[3.43]
2
11
12
13
REMOVE THIS KNOCK-OUT WHEN
BREAKER IS MOUNTED LEFT OF CENTER
Fig. 3
14
16
BOTTOM VIEW
0.12
[3.0]
0.105
[2.67]
0.09
[2.3]
3
4
5
0.075
[1.90]
0.06
[1.5]
6
7
2
3
8
Line
side
Load
side
10
9
5
1
4
Assemble plungers
here for breakers
on 4.50 in[114.3] centers.
Assemble plungers here for breakers
on 6.00 in[152.4] centers.
Fig. 4
7
6
11
INTERLOCK ASSEMBLY
Released n/a, D v1, Dec 03, 1998