2-5 Levering Circuit Breaker
WARNING
EXCESSIVE LEVERING TORQUE CAN DAMAGE THE BREAkER, THE
SWITCHGEAR AND CAUSE SEVERE PERSONAL INJURY. DO NOT
APPLY TORQUE IN EXCESS OF 25 FOOT-POUNDS.
The breaker drawout element has four normal positions in its
compartment as determined by the levering device:
•
REMOVE Position (Figure 2-4)
•
DISCONNECT Position
•
TEST Position
•
CONNECT Position
The REMOVE position is the first position in the compart-
ment as the breaker element is pushed directly by hand
as far as it will go. The DISCONNECT, TEST and CONNECT
positions are reached only by means of the levering device.
The levering device is hand operated with a removable crank
handle. The handle is placed on the levering device worm
shaft, which is exposed by pushing and holding the Push-To-
Trip button on the front of the breaker and depressing the
shutter (Figure 3-3).
With the breaker sitting on the extension rails, make certain
that the breaker levering mechanism arms are in the RE-
MOVE position (Figure 2-4). If they are not, turn the levering
crank in the direction required to get the levering arms in the
REMOVE position. Carefully push the circuit breaker into the
breaker compartment until it physically stops. Begin turning
the levering crank in a clockwise direction. Initially, it helps
to push a bit on the front of the breaker while turning the
levering crank to get the mechanism engaged and started. A
continued clockwise rotation of the levering crank will move
the breaker to the DISCONNECT, TEST and the CONNECT
positions. When the CONNECT position is reached, the
crank suddenly becomes hard to turn. At this point, stop
turning the crank. Note that as the breaker is cranked and
the different positions are reached, a position indication is
given in the position indicator window on the front of the
breaker (Figure 3-3).
Rotation of the levering crank counterclockwise will turn the
levering device arms so as to withdraw the breaker from the
compartment. The procedure is basically the same as just
described except in the opposite direction.
Figure 2-3 DSII Breaker with One Arc Chute Removed
Figure 2-4 DSII Levering Device Arm Shown in REMOVE
Position
Effective July 2010
Instructional Book
IB694C694-03
13
eaton corporation
www.eaton.com
