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Rockwell Automation Publication 750-IN118A-EN-P - May 2021
Chapter 4 Power Wiring
Power Cable Types Acceptable for 400…690 Volt Installations
The following recommendations apply to all input power and motor cables for
all frame sizes:
•
Three tinned copper conductors with XLPE insulation.
•
Copper braid/aluminum foil combination shield and tinned copper drain
wire, three drain wires per cable assembly.
The following statements apply to all input power cables for all frame sizes:
•
Signal wires should be separated from power wires by at least 0.3 m (1 ft).
•
The use of shielded wire for AC input power may not be necessary but is
always recommended.
•
The minimum insulation rating for input power wire must be at least
equal to the nominal system voltage rating.
Recommended Cable Spacing
PowerFlex 755T products require multiple conductors in parallel. The customer
must determine wire size and number of conductors based on drive rated
current, local codes, operating conditions, and specific application needs.
When using multiple conductors per phase, wires must be arranged so that
each conduit, bundle, or cable contains equal numbers of conductors from all
three phases. Make sure that there is a clearance of at least 5.1 mm (2.0 in)
between each end of the busbar and any conductor.
Figure 93 - Conductor Spacing Example
ATTENTION:
National codes and standards (NEC, BSI, and so forth) and local
codes outline provisions for safely installing electrical equipment.
Installation must comply with specifications regarding wire types,
conductor sizes, branch circuit protection, and disconnect devices. Failure
to do so can result in personal injury and/or equipment damage.
Table 11 - Power Cable Specifications
Frame
Cable Use
Minimum Insulation Rating
Cable Type
Cable Description
8
Input Power
• 400…600V systems: 600V, 75 °C (167 °F)
• 690V systems: 1000V, 75 °C (167 °F)
Standard
power cable
Maximum 500 MCM
conductors
Motor
• 400…600V systems: 600V, 75 °C (167 °F)
• 690V systems: 2000V, 90 °C (194 °F)
9
Input Power
• 400…600V systems: 600V, 75 °C (167 °F)
• 690V systems: 1000V, 75 °C (167 °F)
Motor
• 400…600V systems: 600V, 90 °C (194 °F),
sized per 75 °C (167 °F) NEC guidelines
(1)
• 690V systems: 2000V, 90 °C (194 °F)
(1) The cable has an insulation rating temperature of 90 °C (194 °F), but must be sized per 75 °C (167 °F) NEC guidelines.
≥
5.1 mm (2.0 in)