
3 Installation
3.4 Correct EMC installation
DB1 variable frequency drive
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Eaton.com
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3.4.3 Shielding
Cables that are not screened work like antennas (sending, receiving).
The effectiveness of the cable shielding depends on a good shield connec-
tion and a low shield impedance.
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For a proper EMC connection, cables emitting interference
(e.g. motor cables) and susceptible cables (analog signal and
measured values) must be screened and laid separately from
each other.
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Use only screens with tin or nickel-plated copper braiding.
Screens made from steel braids or metal conduits are either not
suitable, or suitable only to a limited extent (depending on the
EMC environment).
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Control and signal lines (analog, digital) should always be groun-
ded on one end, in the immediate vicinity of the supply voltage
source (PES).