Rockwell Automation 1512A MV Controllers - 800A One-High Cabinet - Manual (Page 56)

5-8 Maintenance
1512A-UM102B-EN-P – June 2013
BOLT-ON FUSE removal / installation
Tools required: 3/8-inch drive ratchet, 2-inch extension, 6-inch
extension, 12-inch extension, 1/2-inch socket, 3/8-inch drive torque
wrench.
Note: The fuse configuration will determine what length of extension
will be required to get at the mounting hardware. The fuse configuration
will also determine what size of interphase barriers are installed, the
lower barriers can be removed to provide better access to the fuse
mounting nuts.
1. Remove the two lower mounting nuts, lock and flat washers from
the mounting studs.
2. Remove the upper two mounting nuts, lock and flat washers from
the mounting studs and remove the fuse from the fuse mounting
studs.
3. Install the replacement fuse on the four mounting studs, hold the
fuse in place and install the upper two flat washers, lock washers
and nuts. Torque nuts to 12 ft.-lbs.
4. Install the lower two flat washers, lock washers and nuts. Torque
nuts to 12 ft.-lbs.
5. If interphase barriers were previously removed insure they are
properly reinstalled.
Contactor Maintenance Refer to Medium Voltage Contactor, 800A, Publication
1502-UM051_-EN-P for contactor maintenance instructions.
Contactor Interlock Rod Adjust-
ment
Fuse Removal and
Replacement (cont.)