1) I
L
= leakage current let-go
2) The KU value (symbol KU) is a classification parameter of safety-referred failure types designed to ensure protection against hazardous
body currents and excessive heating.
3) A value of KU = 4.5 with respect to interruptions is attained with: a) a permanently connected protective earth circuit ≥2.5 mm
2
connected via shroud connectors (IEC 603092) and b) a protective earth circuit.
4) KU = 6 with respect to interruptions is achieved for fixedconnection lines ≥10 mm
2
where the type of connection and line layout
correspond to the requirements for PEN conductors as specified in relevant standards.
Cautions and warnings
Please read all safety and warning notes carefully before installing the EMC filter and putting it
into operation (see ). The same applies to the warning signs on the filter. Please ensure that
the signs are not removed nor their legibility impaired by external influences.
Death, serious bodily injury and substantial material damage to equipment may occur if the
appropriate safety measures are not carried out or the warnings in the text are not observed.
Using according to the terms
The EMC filters may be used only for their intended application within the specified values in low-
voltage networks in compliance with the instructions given in the data sheets and the data book.
The conditions at the place of application must comply with all specifications for the filter used.
Warning
It shall be ensured that only qualified persons (electricity specialists) are engaged on work such
as planning, assembly, installation, operation, repair and maintenance. They must be provided
with the corresponding documentation.
Danger of electric shock. EMC filters contain components that store an electric charge. Danger-
ous voltages can continue to exist at the filter terminals for longer than five minutes even after
the power has been switched off.
The protective earth connections shall be the first to be made when the EMC filter is installed
and the last to be disconnected. Depending on the magnitude of the leakage currents, the par-
ticular specifications for making the protective-earth connection must be observed.
Impermissible overloading of the EMC filter or filter, such as with circuits able to cause reso-
nances, impermissible voltages at higher frequencies etc. can lead to bodily injury and death as
well as cause substantial material damages (e.g. destruction of the filter housing).
EMC filters and filters must be protected in the application against impermissible exceeding of
the rated currents by overcurrent protective circuitry.
In case of leakage currents >3.5 mA you shall mount the PE conductor stationary with the
required cross section before beginning of operation and save it against disconnecting. For
leakage currents I
L
1)
<10 mA the PE conductor must have a KU value
2)
of 4.5 A
3)
; for leakage
currents I
L
≥10 mA the PE conductor must have a KU value of 6.
4)
Output chokes and output filters must be protected in the application against impermissible
exceeding of the component temperature.
The converter output frequency must be within the specified range to avoid resonances and
uncontrolled warming of the output chokes and output filters.
Feedthrough components B85321
Filters
Page 8 of 12Please read Cautions and warnings and
Important notes at the end of this document.
