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Effective December, 1998
IL 33-DAH-1
Page 16
Step 17: Installing the Retrofitted Breaker
in the Cell
Do not leave the Breaker in an intermediate
position in the switchgear cell. Always leave
it in the CONNECTED, DISCONNECTED, or
(Optional) TEST position. Failure to do so could
lead to improper positioning of the Breaker and
flashover, causing death, serious personal
injury, and / or property damage.
It is solely the responsibility of the Retrofitter to
make the necessary modifications to the origi-
nal Racking Mechanism, or to manufacture a
Racking Bar Adapter, to insure safe racking of
the Breaker into the Cell. If the Retrofitter opts
to modify the original Racking Mechanism, the
Racking Bar Receptacle must be removed from
the Racking Mechanism, moved to a location
where the Racking Bar will not contact the DTA
during racking, and welded to the Racking
Mechanism.
If the Retrofitter opts to manufacture a Racking
Bar Adapter for use with the original Racking
Mechanism configuration, the drawing and
photo below should be used as a basis.
WARNING
WARNING
Breaker Racking Pivot
Adapter
NOTE: It is the responsibility of the Retrofitter
to insure proper Breaker / Cell fit. When racking
the Breaker into the Connected position, the
Retrofitter MUST FOLLOW BOTH the
manufacturer’s instructions and the customer’s
safety standards and procedures for racking a
Breaker into the Connected position.
A. With the Breaker in the Open position and the
springs discharged, slowly rack the Breaker into
the Connected position, making sure there is no
interference or binding. The Breaker should rack
smoothly and without mechanical interference
between any Breaker and Cell parts. The
Retrofitter will feel some resistance when the
primary fingers connect onto the stabs of the
Cell. This is normal.
However, if any unusual resistance is detected
that could be abnormal interference between
the Breaker and Cell parts, stop immediately
and move the Breaker out of the Connected
position. Examine what is causing the
interference and correct the situation.