Rockwell Automation 1305 AC Drive, Series A and B, Firmware 4.xx-5.xx - Manual (Page 31)

Chapter 2 – Installation/Wiring
2-15
Section B: Use of Output Reactor or Terminator
For longer motor-lead length applications, an output reactor or
Terminator is required to ensure proper drive operation, and for
the motor to operate within its specified insulation rating. The
guidelines in Table 2.E are required for proper drive and motor
operation, or motor designs without phase-separating insulation
paper between motor windings.
Applications with non-inverter duty rated motors, with long
lead lengths, require an output reactor or Terminator. An output
reactor or Terminator helps reduce voltage reflection to the
motor to levels which are less than the motor insulation rating.
Table 2.E lists maximum cable lengths that can be run when
using an output reactor, or one of two available Terminators,
for motor insulation ratings of 1000V, 1200V, and 1600V.
Shielded and unshielded maximum cable lengths also are
listed.
When an output reactor is required, locate the reactor at the
drive if possible. Consult the factory for applications which
require mounting the reactor at the motor.
1000V and 1200V Motor Insulation Ratings: Cable lengths
listed in Table 2.E are for operating the 1305 drive at a
maximum carrier frequency of 2 kHz on motor insulation
ratings of 1000V and 1200V when used with an output reactor
or Terminator. Consult the factory regarding operation above 2
kHz carrier frequency. Multiply listed distances by 0.85 for
operation at high line conditions (above 480V).
1600V Motor Insulation Ratings: Cable lengths listed in
Table 2.E are based on operating the 1305 drive at a maximum
carrier frequency of 2 kHz on motor insulation ratings of
1600V. Consult the factory regarding operation above 2 kHz
carrier frequency.
The Allen-Bradley 1329-HR is representative of 1600V P-P
insulation rating designs and is recommended in applications
where long cable lengths are required.
Example: An existing installation includes a 2 HP, 1200V
motor with a 84-meter (275-foot) cable-length requirement
between the 1305 drive and the motor. What are the possible
solutions to this installation?
1. Table 2.D indicates that either an output reactor or a
Terminator is required for this installation example. Consult
Table 2.E for output reactor, Terminator, and cable types.
2. Table 2.E suggests these possible solutions:
– Install a 1305 2-HP drive with an output reactor installed at
the drive, and use unshielded cable.
– Install a 1305 3-HP drive with an output reactor installed at
the drive, and use shielded or unshielded cable.
– Install a 1305 2-HP drive with a 1204-TFA1 Terminator,
and use shielded or unshielded cable.
Contact Allen-Bradley for further assistance if required.