Schaffner Group
User and Installation Manual
LCL Filter
May 2018
5/21
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Cable or busbar cross sections have to be chosen in accordance with national and international
electric codes and applicable product standards governing the equipment that will incorporate
the LCL filters and the equipment in use.
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Some filters provide additional terminals, e.g. for over-temperature monitoring. These features
have to be properly used before energizing the filter. If uncertain, please consult your local
Schaffner representative.
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In order to get the maximum benefit out of your LCL filter, please also consult aditional user
manuals, installation manuals, whitepaper and other material, published in the download section
of www.schaffner.com. These additional guidelines provide helpful hints for equipment related
topics as well as technical knowledge.
3. Safety notes and regulations
1. Label on equipment
Safety note regulations
2. Safety note category
Equipment installation, start-up, operation and maintenance (if any) have to
be carried out by a trained and certified electrician or technician, who is
familiar with safety procedures in electrical systems. Non-qualified persons
are not allowed to use, install, operate or maintain LCL filters!
High voltage potentials are involved in the operation of power quality
equipment. Always remove power before handling energized parts of the
filter, and let ample time elapse for the capacitors to discharge to safe
levels (<42V). Residual voltages are to be measured both line to line and
line to earth.
Correct protective earthing of the equipment must be established and the
user must be protected against supply voltage in accordance with
applicable national and local regulations. Always practice the safety
procedures defined by your company and by applicable national electric
codes when handling, installing, operating or maintaining electrical
equipment.
When an EMI-filter is required together with the LCL filter contact your local
Schaffner partner for assistance.
Some products may include EMI-filters which may cause leakage currents
to ground. Always connect the filter to protective earth (PE) first, then
continue with the wiring of phase/neutral terminals. When decommissioning
the filter, remove the PE connection at the end.
LCL filters are working with resonance circuits to fulfill specified
performance. Always operate the system within specified switching
frequency range.
INS 1008766 A0
INS 1008766 A0
INS 1008766 A
