64
Instructions for Installation, Operation and
Maintenance of Magnum SB Insulated Case
Low Voltage Power Circuit Breakers
EATON CORPORATION www.eaton.com
Instructional Leaet IB2C12063H03
Effective March 2012
Table 14. Magnum Breaker Torque List
Subassembly lb-in Nm
Arc chute 35-45 3.95-5.08
Front cover 25-35 2.82-3.95
Rating plug Hand tight Hand tight
Rear housing 75-85 8.47-9.60
Line conductor (internal) 100-150 11.30-16.95
Load conductor (internal) 100-150 11.30-16.95
Levering-in to mech bolt Hand tight Hand tight
Motor operator 75-85 8.47-9.60
Poleshaft bearing plates 110-130 12.43-14.69
Current sensor cover screws 18-22 2.03-2.49
Fixed mount feet bolts 75-85 8.47-9.60
Primary disconnect 75-85 8.47-9.60
Trip unit mounting deck 75-85 8.47-9.60
Trip unit mounting plate 18-22 2.03-2.49
Secondary bracket 75-85 8.47-9.60
Reject bracket 75-85 8.47-9.60
Mechanism mounting 75-85 8.47-9.60
Terminal adapters 444-516 50.17-58.30
Breaker Mechanism Inspection
Torque values of mechanism and motor mounting hardware
should be inspected for accuracy. Refer to Table 14 for the
correct values. Next, inspect all sliding rolling parts for clean
and adequate lubrication. Refer to Table 15 and Figure 94
through Figure 101.
Table 15. Greases Used on Magnum
Grease Type Description
MagnalubeT-G
Eaton standards #53701AI
Color Green
Manufactured by Saunders Enterprises Inc.
11-51 44th Road, Long Island City, New York 11101
Phone (718) 729-1000
Fax (718) 729-2690
www.magnalube.com
MolykoteT
Eaton Standards #53701QB
Color Black
Manufactured by Dow Corning Corporation
Midland, Michigan 48686-0994
(989) 636-1000
www.dowcorning.com/content/molykote/
Trip Latch Tip
and Radius
Trip Latch Axle and Bushings (Not
Visible but Directly Behind This
Part). Note: Bushings Must be
Loose in Sidesheet.
Main Drive
Pin and Pivot
Opening
Spring
Pivot
All Pole
Shaft
Bearing
Points
All Pole
Drive Arms
and Pivots
Figure 94. Magnum DS Lubrication
Figure 95.
Inside
Backcatch
Pivot
Backcatch to
Pole Shaft
Both Sides
Magnum DS Lubrication
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