80459-641-01E Model 6 Motor Control Centers
10/2012 Section 6—Maintaining the MCC
© 1999–2012 Schneider Electric All Rights Reserved
65
ENGLISH
Barriers/Insulators—Inspect all insulators, braces, and barriers (see
Figure 95); replace any that show signs of arcing damage, tracking,
excessive heat, or cracking.
Special Units—Follow the manufacturer’s recommended maintenance
procedures for special units (for example: drives, soft starts, and automatic
transfer switches).
Reassembly
To reassemble the MCC after testing and maintenance, follow the steps below:
1. Reinstall all units by reversing Steps 1–12 in “Removing the Control
Unit” beginning on page 57.
2. Confirm the cam mechanism is in the open position; position the
mounting slides of the control unit onto the slots of the mid-shelf. Slide
the unit inward to engage the cam mechanism.
For Compac 6 units, position the mounting slides of the control unit onto
the slots of the mid-shelf. Slide the unit inward until the unit is halfway in,
then move it inward with a quick push. This movement easily overcomes
the compression of the stabs as they engage the vertical bus.
3. Replace all barriers and cover plates and close and fasten all doors.
Figure 95: Manual and Automatic Bus Shutters
Manual Bus Shutter Automatic Bus Shutter
To Next Page
Loading...
