Rockwell Automation SP600 AC Drive User Manual Version 1.0 User Manual
Page 60
4-6
SP600 AC Drive User Manual
When total lead length exceeds 200 feet, nuisance trips can occur
caused by capacitive current flow to ground. Note that these
capacitively-coupled currents should be taken into consideration
when working in areas where drives are running. If the motor lead
length must exceed these limits, the addition of output line reactors
(see section 6.3.1) or other steps must be taken to avoid problems.
Your application may be restricted to a shorter lead length due to:
•
the type of wire (shielded or unshielded)
•
the placement of wire (for example, in conduit or a cable tray)
•
the type of line reactor
•
the type of motor (voltage class, 1000 V, 1200 V, or 1600 V)
•
carrier frequency
Figure 4.1 illustrates how to calculate motor lead lengths. The
examples shown assume a maximum lead length of 200 feet.
Motor lead lengths in excess of 200 feet are possible provided
proper conditions are met. See table A.8 in Appendix A.
Figure 4.1 – How to Calculate Motor Lead Lengths
SP600
Drive
Motor
100
′
100
′
50
′
150
′
100’
50
′
50
′
200
′
Motor
Motor
Motor
Motor
Motor
Motor
SP600
Drive
SP600
Drive
SP600
Drive
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