18 Rockwell Automation Publication 20A-IN009E-EN-P - January 2015
PowerFlex 70 Adjustable Frequency AC Drive
Table 4 - Wiring Specifications
AC Supply Source Considerations
PowerFlex 70 drives are suitable for use on a circuit capable of delivering up to a
maximum of 200,000 rms symmetrical amperes, and a maximum of 600V.
If the drive has a system ground fault monitor (residual current device), use
Type B (adjustable) devices to avoid nuisance tripping.
Unbalanced, Ungrounded, High Resistance or B-phase Grounded Distribution Systems
Install an isolation transformer on an ungrounded distribution system where the
line-to-ground voltages on any phase could exceed 125% of the nominal line-to-
line voltage. See Wiring and Grounding Guidelines for PWM AC Drives,
publication DRIVES-IN001
, for more information on impedance grounded and
ungrounded systems.
Type Wire Types Description
Min Insulation
Rating
Power
(1)(2)
(1) Control and signal wires must be separated from power wires by at least 0.3 m (1 ft).
(2) We recommend the use of shielded wire for AC input power (even if it is not necessary).
Standard 600V, 90 °C (194 °F)
XHHW2/RHW-2
Anixter
B209500-B209507,
Belden 29501-29507,
(or equivalent)
Four tinned copper conductors
with XLPE insulation.
Copper braid/aluminum foil
combination shield and tinned
copper drain wire.
PVC jacket.
–
Signal
(1) (3)
(4)
(3) If the wires are short and contained within a cabinet that has no sensitive circuits, we recommend the use of shielded wire (even if it
is not necessary).
(4) I/O terminals that are labeled “(–)” or “Common” are not referenced to earth ground and are designed to greatly reduce common
mode interference. Grounding these terminals can cause signal noise.
Standard
analog I/O
Belden 8760/9460
(or equivalent)
0.750 mm
2
(18 AWG), twisted
pair, 100% shield with drain.
300V,
75…90 °C
(167…194 °F)
Belden 8770
(or equivalent)
0.750 mm
2
(18 AWG),
three-conductor,
shielded for remote pot.
Digital I/O
(1) (3) (4)
Shielded Multi-conductor
shielded cable such as
Belden 8770
(or equivalent)
0.750 mm
2
(18 AWG),
three-conductor,
shielded.
300V,
60 °C (140 °F)
ATTENTION: To guard against personal injury and/or equipment damage that
is caused by improper fusing or circuit breaker selection, use the recommended
line fuses/circuit breakers that are specified in Drive, Fuse, and Circuit Breaker
Ratings on page 25
.
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