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6
If the breaker is to be lifted onto the compartment's
extension 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 seat-
ed 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 barri-
ers. These instructions will insure proper positioning of
the barriers in the circuit breaker once the barriers are
replaced (Figure 2-2).
A WARNING
INTERPHASE BARRIERS ASSIST IN MAINTAINING
PROPER CLEARANCES AND MUST BE IN PLACE
Figure 2-1 OSI/ Breaker with Lifting Yoke Installed
l.B.
694C694-02
AT
ALL
TIMES DURING CIRCUIT BREAKER OPERA-
TION 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).
A WARNING
ARC
CHUTES MUST ALWAYS BE SECURED PROP-
ERLY IN PLACE BEFORE A CIRCUIT BREAKER IS
INSTALLED IN A CIRCUIT BREAKER COMPART-
MENT.
Inspect the primary contact structure to be sure no dam-
age has occurred during shipment. Replace all inter-
phase barriers and arc chutes.
Checking the electrical and/or manual operation of each
breaker can be done later following the instructions out-
lined in Section 4.
Figure
2-2
OSI/ Breaker with One lnterphase Barrier
Removed
Effective
07
/97
Courtesy of NationalSwitchgear.com
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