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Chapter 2—Engineering considerations
POWERXL SERIES VFD MN040002EN—February 2018 www.eaton.com
Chapter 2—Engineering considerations
Introduction
This chapter describes the most important features in the
energy circuit of a drive system that you should take into
consideration in your project planning.
Figure 7. Drive system (PDS = power drive system)
RCD
PE L1 L2 L3
PE U V W
M
L1
L2
L3
PE
PES
#
CPU
78
Table 23. Drive system components
Item no. Description
1 Power grid configuration, input voltage, input frequency,
interactions with PF correction systems
2 Breakers, fuses, cable cross-sections
3 Protection of persons and animals with residual-current protective
devices
4 Input contactor, disconnector
5 Frequency inverter: mounting, installation; power connection; EMC
measures; circuit examples
6 Output contactor, disconnector
7 Output reactor, dV/dT filter, sine-wave filter
8 Motor protection; thermistor (can be connected to drive directly)
9 Cable lengths, motor cables, shielding (EMC)
10 Motor and application, parallel operation of multiple motors on a
VFD, bypass circuit, DC braking
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