If the breaker is to be lifted onto the compartment’s exten-
sion rails, be certain the rails are fully extended before the
breaker is lifted. Be certain that the four rollers, two on
either side of the circuit breaker, are seated properly on the
extension rails before removing the lifting device.
2-4 Breaker Inspection
All breakers, once removed from their shipping containers,
should be visually inspected for any obvious damage.
Remove the glass polyester interphase barriers. Note any
cautions or instructions printed directly on the barriers.
These instructions will insure proper positioning of the
barriers in the circuit breaker once the barriers are replaced
(Figure 2-2).
WARNING
NTERPHASE BARRIERS ASSIST IN MAINTAINING PROPER CLEAR-
ANCES AND MUST BE IN PLACE AT ALL TIMES DURING CIRCUIT
BREAKER OPERATION WITHIN A BREAKER COMPARTMENT.
Remove the three arc chutes which are mounted on top of
the pole units. Each arc chute is held in place by one top
inserted screw (Figure 2-3).
WARNING
ARC CHUTES MUST ALWAYS BE SECURED PROPERLY IN PLACE
BEFORE A CIRCUIT BREAKER IS INSTALLED IN A CIRCUIT
BREAKER COMPARTMENT.
Inspect the primary contact structure to be sure no damage
has occurred during shipment. Replace all interphase barri-
ers and arc chutes.
Checking the electrical and/or manual operation of each
breaker can be done later following the instructions outlined
in Section 4.
Figure 2-1 DSII Breaker with Lifting Yoke Installed
Figure 2-2 DSII Breaker with One Interphase Barrier
Removed
Effective July 2010
Instructional Book IB694C694-03
12
EATON CORPORATION www.eaton.com
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