3 Installation
3.5 EMC installat ion
DC1 Variable Frequency Drive 04/16 MN04020003Z-EN www.eaton.com 71
performed and the test must then be repeated. The system must then fail
the test, indicating that the overvoltage protection components have been
reconnected.
3.5.4 Screen earth kit
Cables that are not screened work like antennas (sending, receiving).
The effectiveness of the cable screen depends on a good screen connection
and a low screen impedance.
NOTICE
The screw labeled VAR ( Figure 36, page 69) must not be
manipulated as long as the variable frequency drive is
connected to the mains or there is a DC link voltage.
￫
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.
￫
Use only screens with tinned or nickel-plated copper braiding.
Screens made of steel braids or metal conduits are either not
suitable or suitable only to a limited extent (depending on the
EMC environment).
￫
Control and signal lines (analog, digital) should always be
grounded on one end, in the immediate vicinity of the supply
voltage source (PES).
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