Siemens TL.. Bedienerhandbuch PDF herunterladen (Seite 20)

Operating Instructions

Manipulating the Moveable Drawout Element

There are four positions of the moveable drawout element.

These four positions are deﬁned as Connected, Test,

Unlocked, and Unlocked/Withdrawn.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 second-

ary contacts are connected, and the moveable drawout ele-

ment is locked into position. The

unlocked

position is a

transition position between the test position and the with-

drawn position.

Moveable drawout element in the Connected position.

Moveable drawout element in the Test or Unlocked position.

Moveable drawout element in the W

ithdrawn position.

Physically, the unlocked position and test position are the

same. However, in the unlocked position, the moveable

drawout element is disengaged from the drive mechanism.

The breaker should not be tested when the moveable drawout

element is in the unlocked position. In the

unlocked/with-

drawn

position, the secondary contacts are disconnected and

the moveable drawout element is disengaged from the

elease mechanism. The moveable drawout element can be

pulled to the fully withdrawn position where it can be

inspected or removed from the stationary drawout element.

NOTE: Relationship of ﬁnger clusters and bus will be the

same for all drawout frames. Conﬁgurations may change.

Connected Position

Test or Unlocked Position

Withdrawn Position

Bus

Stab

Finger

Cluster

ConnectedTest

Bus

Stab

Finger

Cluster

Bus

Stab

Finger

Cluster

UnlockedTest

Bus

Stab

Finger

Cluster

Bus

Stab

Finger

Cluster

WithdrawnUnlocked

Bus

Stab

Finger

Cluster

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 65 66

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