ABB DCS 400, Manual

Page: 106 / 192

II K 5-6
Installation
1 Classification
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(domestic and light industry)
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unscreened cable with limitation,
see
screened cable, see
Line filter
Line choke
To other loads which
must be protected
against line pollution
caused by converters
(HF disturbance and
commutation notches).
Mounting
plate
Line filter
Line choke
A separation transformer
with grounded screen and
with grounded iron core
makes the line filter and the
line choke unnecessary.
Operation with separate converter
(dedicated) transformer. If there are other
loads at the same secondary winding they
have to withstand the commutation
notches, caused by the converter. In some
cases line chokes are necessary (see
section ).
Operation at the public low
voltage line together with other
loads of all kinds except some
kinds of sensitive communication
means. Operation at the
public low voltage line
together with other
loads of all kinds
Figures e.g.
see cross reference point
in chapter 3
Converter Converter Converter Converter
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Converter
transformer
with earthed
iron core
(and if
present earth
screen also)
Insulated industrial
low voltage line for up
to 1000V with earth
conductor
Earthed
star point
Supply transformer of a
residental region with light
industry (rated power
normally
≤
1.2 MVA)
Earthed public 400V
line with neutral
conductor
Medium-voltage line
Supply transformer of
an industry region
(rated power normally
≤
1.2 MVA) Earthed
star point
Earthed public 400V
line with neutral
conductor
Medium-voltage line
Mounting
plate
Mounting
plate
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Line choke
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rna
tive
alt
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rna
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Figure 5.2 - 1 EMC Classification guideline