4
Instructions for Installation, Operation and
Maintenance of Magnum SB Insulated Case
Low Voltage Power Circuit Breakers
EATON CORPORATION
www.eaton.com
Instructional Leaflet
IB2C12063H03
Effective March 2012
Figures Page
Figure 57 . Connection Diagram for SBSE Double-wide Frame
with Digitrip 520 and 520M with AABBCC Configuration . 45
Figure 58 . Connection Diagram for SBSE Double-wide Frame
with Digitrip 520MC with AABBCC Configuration . . . . . . 46
Figure 59 . Connection Diagram for SBSE Double-wide Frame
with Digitrip 1150 with AABBCC Configuration . . . . . . . . . 47
Figure . 60 . Through-the-Window Electrical Accessories . . 48
Figure 61 . Shunt Trip with Cutoff Switch . . . . . . . . . . . . . . 48
Figure 62 . Shunt Trip Switch Installed . . . . . . . . . . . . . . . . 48
Figure 63 . Spring Release with Optional Latch Check Switch . 49
Figure 64 . Undervoltage Release Device . . . . . . . . . . . . . .49
Figure 65 . Shunt Trip, Spring Release and Undervoltage
Release Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 66 . Auxiliary Switch (2A/2B) . . . . . . . . . . . . . . . . . . 50
Figure 67 . Mechanical Trip Indicator with Associated
Overcurrent Trip Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 68 . Motor Operator Kit . . . . . . . . . . . . . . . . . . . . . . 51
Figure 69 . Motor Operator Installed in Narrow Frame
Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 70 . Cover Mounted Key Lock and Operations Counter . 51
Figure 71 . Cassette Mounted Key Lock . . . . . . . . . . . . . . . 52
Figure 72 . ON-OFF Pushbutton Lockable Cover Plate . . . 52
Figure 73 . Typical Safety Shutters in Closed Position . . . . 53
Figure 74 . Typical Safety Shutters in Open Position . . . . . 53
Figure 75 . Cell Switch (Drawout Position Indicator)
Unmounted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 76 . Cell Switches Mounted on Cassette . . . . . . . . 53
Figure 77 . Door Escutcheon and Gasket . . . . . . . . . . . . . . 54
Figure 78 . IP54 Waterproof Cover . . . . . . . . . . . . . . . . . . . 54
Figure 79 Cassette-Mounted 2-Way Cable Interlock . . . . . 54
Figure 80 . Drawout Circuit Breaker in Cassette . . . . . . . . 55
Figure 81 . Drawout Circuit Breaker with Automatic
Primary Disconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 82 . Typical Drawout Cassette Features . . . . . . . . . 56
Figure 83 . Typical Narrow Frame Cassette
(Horizontal Terminals) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 84 . Typical Basic Cassette (Without Stabs) . . . . . . 57
Figure 85 . Typical Standard Cassette (Vertical Terminals) . 57
Figure 86 . Typical Universal Cassette, 4-Pole
(Flat Terminal Pads) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 87 . Fixed Circuit Breaker with Available
Vertical Adaptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 88 . Nameplate SB . . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 89 . Top Rear View of Circuit Breaker with One
Arc Chute Removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figures Page
Figure 90 . Bottom View of Arc Chute . . . . . . . . . . . . . . . . 62
Figure 91 . Primary Contacts with Circuit Breaker Open
(Not Used for Contact Wear Inspection) . . . . . . . . . . . . . . 62
Figure 92 . Contact Inspection Area with Circuit
Breaker Open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Figure 93 . Use of Contact Wear Indicator with Circuit
Breaker Closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Figure 94 . Magnum DS Lubrication . . . . . . . . . . . . . . . . . 64
Figure 95 . Magnum DS Lubrication . . . . . . . . . . . . . . . . . 64
Figure 96 . Magnum DS Lubrication (Not applicable
to Fixed-Mount Breakers) . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 97 . Magnum DS Lubrication . . . . . . . . . . . . . . . . . . 65
Figure 98 . Magnum DS Lubrication . . . . . . . . . . . . . . . . . 65
Figure 99 . Magnum DS Lubrication . . . . . . . . . . . . . . . . . 65
Figure 100 . Magnum DS Lubrication—Levering-in
Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 101 . Magnum DS Lubrication—Levering-in
Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 102 . Trip Unit Rating Plug Location . . . . . . . . . . . . . 66
Figure 103 . Current Sensor Cover in Place Over Sensors . 67
Figure 104 . One Current Sensor Shown Removed and
Disconnected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table Title
Page
Table 1 . Magnum SB Ratings . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2 . Basic Circuit Breaker Weights . . . . . . . . . . . . . . . 10
Table 3 . Rejection Interlock Pin Locations for Standard
and Double-wide Frames . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 4 . Rejection Interlock Bracket Bolt Locations
for Narrow Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 . Magnum Digitrip Trip Units . . . . . . . . . . . . . . . . . 25
Table 6 . Magnum SB Current Sensors and Matching
Rating Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 7 . Shunt Trip Ratings . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 8 . Spring Release Ratings . . . . . . . . . . . . . . . . . . . . 49
Table 9 . Auxiliary Switch, Overcurrent Trip Switch and
Cell Switch Contact Ratings . . . . . . . . . . . . . . . . . . . . . . . 50
Table 10 . Undervoltage Release . . . . . . . . . . . . . . . . . . . . 50
Table 11 . Motor Operator . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 12 . Inspection Frequency . . . . . . . . . . . . . . . . . . . . . 59
Table 13 . Field Service Tool List . . . . . . . . . . . . . . . . . . . . . 60
Table 14 . Magnum Breaker Torque List . . . . . . . . . . . . . . . 64
Table 15 . Greases Used on Magnum . . . . . . . . . . . . . . . . 64
Table 16 . Circuit Breaker Troubleshooting Guide . . . . . . . . 68
