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8. 400A and 600A Bolted Clamp Assembly
The clamp assembly is required for replacement or assembly of 400A and 600A circuit breakers or disconnect switches
that are mounted directly to the vertical bus.
A
- Vertical Bus Bar
B
- Carriage Bolt
C
- Flat Washer
D
- 3/8" Standard Hex Nut
E
- Clamping Spring
F
- Bar
G
- Tie Bar
H
- Carriage Bolt
I
- Flat Washer
J
- 3/8" Standard Hex Nut
K
- Riser from breaker / disconnect
Clamp Removal
1. Refer to Figure 14 for parts identification.
Loosen nut J and remove bolt H, washer I, and nut from riser.
2. Loosen nut D and remove bolt B, washer C, and nut from
the clamp assembly.
3. Remove tie bar and clamp assembly simultaneously.
4. Repeat steps 1 - 4 for each phase.
Clamp Assembly
Notice: To be installed on 600A or 800A vertical bus only.
1. Connect tie bar riser by sliding bolt H through tie bar and riser.
Fasten with washer I and torque nut J and bolt H securing to
280 in-lbs.
2. Loosely assemble the clamp assembly, making sure that
clamp spring E will compress against bar F, when the the bolt
is drawn tight.
3. Slide carriage bolt B through one side of the clamp assembly
and tie bar until it portrudes therough the other side of the
clamp assembly. Fasten with washer C and torque nut D to
bolt B securing to 280 in-lbs.
4. Repeat steps 1 - 3 for all phases.
5. Refer to Figure 15 for completed assembly.
Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092
E87010-A0401-T002-A5-MCC
tiastar
B
H
K
I
J
Figure 14
Figure 15
Motor Control Center
TM
Page 10 of 12
A
F
E
C
D
G
A5E33045207A
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