Rockwell Automation DC3RD Digital Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 18)

The DC3RD drive has line fuses mounted on fuse holders
501 and 502 (FU501 and FU502). When replacing the line
fuses, use fast acting fuses rated for 250 VAC or higher,
and at least 200% of the armature current. See Table 1 for
recommended line fuse sizes.
10 Installation
It may be necessary to earth ground the shielded cable. If
noise is produced by devices other than the drive, ground
the shield at the drive end. If noise is generated by a device
on the drive, ground the shield at the end away from the
drive. Do not ground both ends of the shield.
If the drive continues to pick up noise after grounding the
shield, it may be necessary to add AC line filtering devices,
or to mount the drive in a less noisy environment.
Heat sinking
The DC3RD contains sufficient heat sinking in its basic
configuration. No additional heat sinking is necessary.
Line fusing
ATTENTION: Most code requires that upstream
branch protection be provided to protect input power
wiring. Failure to observe this precaution could result in
severe bodily injury or loss of life.
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