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Operating Instructions
Part Two- Manipulating the Moveable Drawout Element
Manipulating the Moveable Drawout Element
There are four positions of the moveable drawout element
These four positions are defined as Connected, Test,
Unlocked, and Withdrawn. The
the normal operating position of the breaker . In this posi
tion the primary stabs and secondary contacts are con
nected and the moveable drawout element is locked into
position. In the
position, the primary stabs are discon
test
nected, the secondary contacts are connected, and the
moveable drawout element is locked into position. The
position is a transition position between the test
unlocked
Moveable drawout element in the Connected position
Moveable drawout element in the Test or Unlocked position
Moveable drawout element in the Withdrawn position
(2000A frame drawout used for illustration purposes.)
NOTE: Relationship of finger clusters and bus Will
be the same for the 4000A frame drawout.
connected
position is
.
position and the withdrawn position. Physically, the un
locked position and test position are the same . However, in
the unlocked position, the moveable drawout element is
disengaged from the interlock mechanism. The breaker
should not be tested when the moveable drawout element
is in the unlocked position. In the
secondary contacts are disconnected and the moveable
drawout element is disengaged from the interlock mecha
nism. The moveable drawout element can be pulled to the
fully withdrawn position where it can be inspected or
removed from the stationary drawout element
Stab
Finger
Cluster
Test
Connected Position
Stab
Finger
Cluster
Test
Test and Unlocked Position
Stab
Finger
Cluster
Unlocked
Withdrawn Position
withdrawn
position, the
Finger
Cluster
Connected
Stab
Finger
Cluster
Unlocked
Stab
Finger
Cluster
Withdrawn
19
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