Rockwell Automation 1512A MV Controllers, 400A One-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 54)

46 Rockwell Automation Publication 1512A-UM100F-EN-P - May 2013
Chapter 5 Maintenance
BOLT-ON FUSE Removal/Installation
Tools required: 3/8 in. drive ratchet, 2 in. extension, 6 in. extension, 12 in.
extension, 1/2 in. socket, 3/8 in. drive torque wrench.
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 15 N•m (12 lb•ft).
4. Install the lower two flat washers, lock washers and nuts. Torque nuts to
15 N•m (12 lb•ft).
5. If interphase barriers were previously removed ensure they are properly
reinstalled.
CLIP-ON FUSE Removal/Installation
Recommended tool: Fuse extractor part # 80144-491-02 (optional)
1. Place the cup section of the fuse extractor over the top of the fuse.
2. Pull back on fuse extractor with a quick motion to dislodge the upper
portion of the fuse from top fuse clip.
3. Set fuse extractor aside.
4. Remove the lower portion of the fuse from fuse clip by pulling up and
slightly rotating the fuse in one entire movement.
5. To install the replacement fuse, place the fuse between the fuse clips.
6. Ensure that the flares on the fuse ferrules are properly located with respect
to the fuse clips.
ATTENTION: The fuses may be hot for up to one hour after operating. Verify the
temperature before handling and use insulated hand protection if needed.
Failure to do so may result in burns.
TIP 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.
TIP The interphase barriers located at the bottom of the fuse assembly can be
removed to ease the removal and installation of the fuse.