Rockwell Automation 1336S Plus FRN 1.xx-5.xx - Manual (Page 45)

2–35 Installation/Wiring
Applications with non-inverter duty motors or any motor with
exceptionally long leads may require an output filter or cable
terminator. A filter or terminator will help limit reflection to the
motor, to levels which are less than the motor insulation rating.
Table 2.E lists the maximum recommended cable length for
unterminated cables, since the voltage doubling phenomenon occurs
at different lengths for different drive ratings. If your installation
requires longer motor cable lengths, a reactor or cable terminator is
recommended. Refer to Table 2.E for frequency, cable length and
voltage restrictions of 1204-TFA1 or 1204-TFB2 terminators.
Optional Output Reactor
Bulletin 1321 Reactors listed in the 1336 PLUS-3.0 Price Sheet can
be used for drive input and output. These reactors are specifically
constructed to accommodate IGBT inverter applications with
switching frequencies up to 20 kHz. They have a UL approved
dielectric strength of 4000 volts, opposed to a normal rating of 2500
volts. The first two and last two turns of each coil are triple insulated
to guard against insulation breakdown resulting from high dv/dt.
When using motor line reactors, it is recommended that the drive
PWM frequency be set to its lowest value to minimize losses in the
reactors.
Important: By using an output reactor the effective motor voltage will
be lower because of the voltage drop across the reactor –
this may also mean a reduction of motor torque.
1336 PLUS drives, 45 kW (60 HP) and up that have cooling fans
utilize a transformer to match the input line voltage to the proper fan
voltage. If an input voltage other than the standard 240, 480 or 600V
AC is used, the transformer tap may have to be changed.
!
ATTENTION: To avoid a shock hazard, assure that
all power to the drive has been removed before
proceeding.
1. Ensure that all power has been removed to the drive.
2. Locate the transformer in the lower left corner of the drive
chassis. Note lead placement (tap being used).
3. Determine the correct tap from the following figure and verify.
4. If present tap is incorrect, remove the insulating sleeve from the
correct tap.
5. Remove the wire lead presently connected and place on the
selected tap. Replace the insulating sleeve on the unused tap.
Selecting/Verifying Fan
Voltage