Rockwell Automation Publication 2198-UM002L-EN-P - October 2021 389
Appendix D Maximum Motor Cable Lengths for Kinetix 5700 Power Supplies
Regenerative Bus Supply Configurations
These tables assume that no output reactor is used between the inverter and
the motor. Contact Technical Support for help when applying output reactor
solutions.
Table 195 - Regenerative Bus Supply (480V AC input)
AC Input Power Source Type
(1)
Motor Insulation Rating
(2)
Drive-to-Motor Cable Length, max
(3)
m (ft)
With DC-bus Conditioner Without DC-bus Conditioner
WYE Grounded
1000V – –
1200V – –
1488V 30 (98.4) 15 (49.2)
1600V 50 (164) 30 (98.4)
WYE Impedance Grounded
(4)
1000V – –
1200V – –
1488V 30 (98.4) 15 (49.2)
1600V 50 (164) 30 (98.4)
(1) Corner-grounded and ungrounded input power can be used, but you must add an isolation transformer to the input power circuit to provide grounded-WYE power. Unbalanced, floating, or
ungrounded systems can cause additional stress to the motor. For more information on these input power source types, see Input Power Configurations for Kinetix 5700 Power Supplies on
page 121
.
(2) Motor Corona Inception Voltage (CIV) or Partial Discharge Inception Voltage (PDIV) ratings for motor phase-to-ground and phase-to-phase insulation systems.
(3) Cable lengths are estimated assuming nominal DC-bus voltage at nominal AC line input voltage. Operation at high AC line voltage or increased DC-bus voltage for prolonged periods of time
can cause additional stress to the motor insulation and can cause premature motor failure.
(4) Impedance grounded systems running in ground fault conditions, for prolonged periods of time, cause additional stress to the motor insulation and can cause premature motor failure.
Table 196 - Regenerative Bus Supply (400V AC input)
AC Input Power Source Type
(1)
Motor Insulation Rating
(2)
Drive-to-Motor Cable Length, max
(3)
m (ft)
With DC-bus Conditioner Without DC-bus Conditioner
WYE Grounded
1000V – –
1200V 15 (49.2) 15 (49.2)
1488V
90 (295) 90 (295)
1600V
WYE Impedance Grounded
(4)
1000V – –
1200V 15 (49.2) 15 (49.2)
1488V
90 (295) 90 (295)
1600V
(1) Corner-grounded and ungrounded input power can be used, but you must add an isolation transformer to the input power circuit to provide grounded-WYE power. Unbalanced, floating, or
ungrounded systems can cause additional stress to the motor. For more information on these input power source types, see Input Power Configurations for Kinetix 5700 Power Supplies on
page 121
.
(2) Motor Corona Inception Voltage (CIV) or Partial Discharge Inception Voltage (PDIV) ratings for motor phase-to-ground and phase-to-phase insulation systems.
(3) Cable lengths are estimated assuming nominal DC-bus voltage at nominal AC line input voltage. Operation at high AC line voltage or increased DC-bus voltage for prolonged periods of time
can cause additional stress to the motor insulation and can cause premature motor failure.
(4) Impedance grounded systems running in ground fault conditions, for prolonged periods of time, cause additional stress to the motor insulation and can cause premature motor failure.
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