Circuit Breaker Positioning; Levering Circuit Breaker; Figure 13. Connect Position; Figure 14. Cassette Label Showing Disconnected, Test And - Eaton SBN-508 Instructions For Installation, Operation And Maintenance

Instructional Leaflet
Effective March 2012

Figure 13. Connect Position

Figure 14. Cassette Label Showing Disconnected, Test and

Connected Position of Recessed Cover

Circuit Breaker Positioning

Magnum SB drawout circuit breakers have four normal
positions:
• REMOVE (Withdrawn) (Figure 10)
• DISCONNECT (Figure 11)
• TEST (Figure 12)
• CONNECT (Figure 13)
The REMOVE position is a position outside the compartment
on the cassette's drawout rails where the circuit breaker is not
engaged with the levering mechanism . The DISCONNECT, TEST,
and CONNECT, positions are reached by means of the levering
mechanism .
14 EATON CORPORATION www.eaton.com
IB2C12063H03
Full Breaker Operation
Primary, Secondary and Ground Connections Made
Fully Racked into Cassette (Compartment)
Instructions for Installation, Operation and
Maintenance of Magnum SB Insulated Case
Secondary
Connection Made
Compartment
Front Door
Circuit
Breaker
Side View
With the breaker solidly positioned on the cassette's extension
rails and the levering-in mechanism in the DISCONNECT
position, carefully and firmly push the circuit breaker into the
compartment as far as it will go . The outer (recessed) portion
of the circuit breaker face plate should align with the GREEN
target line (labelled DISC) on the inside top left wall of the
cassette (Figure 14)

Levering Circuit Breaker

DO NOT DISABLE REJECTION INTERLOCKS. DOING SO AND USING
A LOWER CAPACITY CIRCUIT BREAKER IN AN INCOMPATIBLE
CASSETTE COULD RESULT IN AN ELECTRICAL FAULT WHICH COULD
RESULT IN DEATH, BODILY INJURY AND/OR EQUIPMENT DAMAGE.
The circuit breaker is now ready to be levered . With the circuit
breaker OPEN, the levering device access door can be raised .
The levering device is hand operated using a standard 3/8"
square drive and ratchet, which is not provided (Figure 15) . As
long as the access door is raised, the circuit breaker is held
trip free . Begin by rotating the levering-in screw to the full
counterclockwise (DISCONNECT) position .
Close the compartment door and begin levering the breaker
into its different positions using a clockwise ratcheting motion .
When the circuit breaker is levered fully to the DISCONNECT
or CONNECT position the levering shaft hits a hard stop;
do not exceed 25 ft .lb . of torque or the levering mechanism
may be damaged . The circuit breaker can be levered with the
compartment door open or closed, but it is advisable to close
the door prior to levering . The position of the circuit breaker
within its compartment is indicated by color coded position
indicators (Red = Connect, Yellow = Test, Green = Disconnect)
(Figures 15 and 20) . To remove the circuit breaker from its
compartment, follow the procedure just described using a
counterclockwise ratcheting motion .
Low Voltage Power Circuit Breakers
Rear of
Compartment
Primary
Connections
Not Made
CAUTION