23
Instruction Book
IB182923EN September 2018 www.eaton.com
AMH-4.76-VR
+
VR-Series
+
Replacement Circuit Breaker
5.11 REMOVAL PROCEDURE
a. To remove the circuit 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 circuit breaker is closed.
Engage the rotary racking handle into the racking nut. Rotate
the rotary racking handle counter-clockwise to move the circuit
breaker out of the cell. The shutters will start to close after the
primary stabs have cleared, isolating the circuit breaker from its
source. Continue rotating racking handle counter-clockwise until
the position indicators on the circuit breaker and cell indicate test
position. In test position the circuit breaker can be operated either
electrically or mechanically. Remove rotary racking handle before
performing any testing.
b. To further remove the circuit breaker to the disconnect position
continue turning the rotary racking handle in the counter-clockwise
direction. If the circuit breaker was inadvertently left charged in
the test position, the springs will discharge as the circuit breaker
is racked to the disconnect position, resulting in a loud noise. The
circuit breaker will be in the disconnect position when the rotary
racking handle can no longer be turned with normal force, and
the circuit breaker and cell position decals indicate disconnect
position. At this point, the circuit breaker will be open with the
springs discharged.
c. If the circuit breaker is to be withdrawn, press the interlock pedal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 circuit breaker. (Figure 3.3)
Figurt 5.6. AMH-VR+ in tht Conntct Position
