Eaton DS7 Series, Manual

Page: 44 / 240

2 Engineering
2.10 Cables, contactors, line filters
40
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com
In this case, a PKE motor-protective circuit-breaker is connected to the
DS7-SWD soft starter with the PKE32-COM communication cable via the
PKE-XTUA-… trip block. Data will be exchanged between the data interfaces
of the PKE trip block.
If the DS7-SWD soft starter is connected to a SmartWire-DT network, the
DS7-SWD soft starter will transmit the data for the PKE trip block (currents)
to a higher-level main controller (PLC).
2.10 Cables, contactors, line filters
The cables used must meet the requirements of locally applicable
regulations at the site of installation.
Large dimensioned cables and contactors are required when frequent
startups and high starting currents are expected. The load capacity limits of
the contactors are listed in the relevant documentation. The appropriate
assignment of mains contactor for the selected starting cycle of the soft
starters is provided in appendix under page 223.
The fuses and cable cross-sections to be selected for the incoming and
outgoing cables are also listed there.
The specifications in the Appendix refer to:
• use in control panels and machines,
• installation in the cable duct,
• a maximum ambient air temperature of +40 °C,
• normal starting frequency.
The fuses and conductor cross-sections depend on the rated operational
current of the motor as well as the start cycle (operating frequency,
overcurrent).
No line filters or chokes are needed.
￫
In applications with an overdimensioned soft starter, the
minimum connectable terminal capacity of the soft starter must
be taken into account and the motor must be wired if necessary
with a larger conductor cross-section.
￫
When selecting the cable cross-section, take into account the
voltage drop under load.
Compliance to further standards is the responsibility of the user.