Removal Procedure - Eaton AMH-4.76-VR Instruction Book

AMH-4.76-VR
Replacement Circuit Breaker
Figurt 5.6. AMH-VR in tht Conntct Position

5.11 REMOVAL PROCEDURE

a. To remove the breaker from the cell, it must be in the open
position and the racking access handle in the top right slot;
interlocking will prevent removal if the breaker is closed. Engage
the rotary racking handle into the racking nut. Rotate the rotary
racking handle counter-clockwise to move the breaker out of the
cell. The shutters will start to close after the primary stabs have
cleared, isolating the breaker from its source. Continue rotating
racking handle counter-clockwise until the position indicators
on the breaker and cell indicate test position. In test position
the breaker can be operated either electrically or mechanically.
Remove rotary racking handle before performing any testing.
b. To further remove the breaker to the disconnect position continue
turning the rotary racking handle in the counter-clockwise
direction. If the breaker was inadvertently left charged in the test
position, the springs will discharge as the breaker is racked to
the disconnect position, resulting in a loud noise. The breaker will
be in the disconnect position when the rotary racking handle can
no longer be turned with normal force, and the breaker and cell
position decals indicate disconnect position. At this point, the
breaker will be open with the springs discharged.
c. If the breaker is to be withdrawn, press the interlock pedal while
pulling the breaker out of the cell using the handles on the front
of the breaker. (Figure 3.3)
22 Instruction Book IB182023EN March 2016 www.eaton.com