Operating Instructions
19
Manipulating the Moveable Drawout Element
There are four positions of the moveable drawout element.
These four positions are defined as Connected, Test, Un-
locked, and Withdrawn. The connected position is the
normal operating position of the breaker. In this position the
primary stabs and secondary contacts are connected and
the moveable drawout element is locked into position. In the
test position, the primary stabs are disconnected, the sec-
ondary contacts are connected, and the moveable drawout
element is locked into position. The unlocked position is a
transition position between the test
Part Two - Manipulating the Moveable Drawout Element
position and the withdrawn position. Physically, the unlocked
position and test position are the same. However, in the
unlocked position, the moveable drawout element is disen-
gaged from the interlock mechanism. The breaker should not
be tested when the moveable drawout element is in the
unlocked position. In the withdrawn position, the secondary
contacts are disconnected and the moveable drawout ele-
ment is disengaged from the interlock mechanism. The
moveable drawout element can be pulled to the fully with-
drawn position where it can be inspected or removed from
the stationary drawout element.
Courtesy of NationalSwitchgear.com
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