Dynamic Braking Kit for FlexPak Plus and MinPak Plus DC Drives
7
Installing the Dynamic Braking Kit in a MinPak Plus DC Drive
Important: Dynamic Braking kit installation is different for FlexPak Plus and MinPak Plus DC drives. This
section describes how to install the Dynamic Braking kit in a MinPak Plus DC drive. Refer to the
previous section for installation in a FlexPak Plus DC drive.
Refer to your MinPak Plus DC drive instruction manual for help locating and identifying drive components.
Unless otherwise noted, the following steps must be performed on all MinPak Plus drives.
Step 1. Disconnect, lock out, and tag input power to the drive.
Step 2. Remove the drive cover.
Step 3. Verify that no voltage is present at the drive’s
AC
input terminals, L1/181 and L2/182.
Step 4. Remove the two screws from the terminal block and circuit breaker mounting bracket. Position this
bracket up and out of the way as far as possible.
Step 5. Regenerative MinPak Plus only: Loosen the auxiliary mounting bracket and the M-contactor. Move
them aside.
Step 6. Locate the two small drilled holes near the upper right of the chassis.
Step 7. Position the Dynamic Braking kit so that the longer lead is toward the right side of the chassis. Mount
it with the two mounting screws provided.
Step 8. For all regenerative MinPak Plus DC drives and non-regenerative MinPak Plus DC drives
without a Reversing Contactor: Connect the dynamic braking resistor to the normally closed (
NC
)
contacts of the drive’s M-contactor. These contacts are to the rear of the M-contactor. This places the
resistor across the motor’s armature when the M-contactor is de-energized. Refer to figures 2 and 5.
Step 9. For non-regenerative MinPak Plus DC drives with a Reversing Contactor: Connect the dynamic
braking resistor between corresponding normally closed (
NC
) contacts on the forward contactor and
the reversing contactor. These contacts are to the rear of the contactors. This places the resistor
across the motor armature (A1 and A2) when the contactors are de-energized. Refer to figures 4
and 6.
Step 10. Verify the wiring of the Dynamic Braking resistor. Make sure connectors are securely fastened.
Step 11. Reattach the terminal barrier and circuit breaker mounting bracket removed in step 4.
Step 12. Reattach the cover to the drive.
Step 13. Apply power and test the braking capability of the drive.
This completes the installation of the Dynamic Braking Kit for the MinPak Plus DC drives.
!
ATTENTION: Do not install modification kits with power applied to the drive. Disconnect, lock
out, and tag all sources of incoming AC power to the drive before attempting such installation.
Verify that no voltage is present at the drive’s
AC
input terminals, L1/181 and L2/182. Failure
to observe this precaution could result in severe bodily injury or loss of life.
ATTENTION: The user is responsible for conforming with all applicable local, national, and
international codes. Failure to observe this precaution could result in damage to, or destruction
of, the equipment.
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