Eaton Magnum Air MWN-408 User Manual page 52

Magnum
If the circuit breaker is a drawout configuration, the lower
primary disconnect finger clusters and the vertical
adaptors must first be removed from frame sizes up to
3000/3200A. On the 3000/3200A frame, both the upper
and lower primary disconnects and vertical adaptors must
be removed. Each primary disconnect finger cluster is
removed by loosening the two hex-head bolts with a 10
mm wrench. These bolts do not have to be completely
removed to slide the primary disconnects off of the
terminals. Remove the vertical adaptors next from the
circuit breaker terminals by removing the two or three 10
mm bolts holding them in place (Figure 6-8).
The current sensors are removed by pulling them off of
the terminals and unplugging the wiring plugs from the
sensors (Figure 6-8).
Install new current sensors by connecting the wiring
plugs to the sensors and sliding the sensors over the
terminals. Reinstall the cover over the sensors and
secure in place with the screws previously removed.
Reinstall the previously removed vertical adaptors to the
terminals using the removed hardware and 40 ft-lb of
tightening torque. Make sure the vertical adaptors are
square to the rear housing. Slip the primary disconnects
on to the vertical adaptors. Make sure the primary
disconnects are fully inserted on to the vertical adaptors.
Tighten the two retention bolts to 40 in-oz of torque.
Properly engaged and secured retention bolts should
engage the slots or holes in the vertical adaptors.
52
2
Figure 6-8: One Current Sensor Shown Removed and
Disconnected
1. Vertical Adapter
2. Current Sensor
3. Wiring Plug
1
3
1812.900A