Rockwell Automation DC3N DC Drive User Guide, 1/4-2HP-115/230 VAC User Manual

Page 23

Installation

15-amp line fuses are preinstalled on models DC3N-12D-01-010-AN and
DC3N-12D-4X-010-AN. If the horsepower rating of the motor being used is less
than the maximum horsepower rating of the drive, the line fuse may have to be
replaced with a lower rated one. Refer to Table 1 on page 9 to install a lower rated
fuse. External line fuses are not required.

Install the required, user-supplied branch circuit protection fuses according to the
applicable local, national, and international codes (e.g., NEC/CEQ. The fuses must
be installed in the line before the drive input terminals.

Connections

Heat sinking

The DC3N Plate Style and NEMA1 enclosed models require additional heat
sinking when the continuous armature current is above 5 ADC. Use Reliance
Electric part numbers:

• DC3N-HS-00 for the Plate Style drive
• DC3N-HS-01 for the NEMA 1 enclosed drive

NOTE: NEMA4X/12 models include a heatsink as standard.
All other enclosed drives have sufficient heat sinking in their basic configurations.
Use a thermally conductive heat sink compound (such as Dow Corning® 340 Heat
Sink Compound) between the back of the drive enclosure and heat sink surface for
optimum heat transfer.

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.

ATTENTION:

Do not connect this equipment with power applied. Failure to

observe this precaution may result in fire or serious injury.

Motor

Connect a motor to terminals A1 and A2 as shown in Figure 8. Ensure that the
motor voltage rating is consistent with the drive’s output voltage.

ATTENTION:

To provide the motor with overload protection, local, national,

and international codes (e.g.,NEC/CEC) require that a motor thermostat,
internal to the motor, be installed or an electronic thermal motor overload relay,
sized to protect the motor, be installed between the motor and the drives output
terminals.