Rfi Filters / Mains Filters - Lenze i550-C0.25/120-1 Project Planning Manual

Accessories

RFI filters / Mains filters

RFI filters / Mains filters
RFI and mains filters are used to ensure compliance with the EMC requirements of European
Standard EN 61800-3. This standard defines the EMC requirements for electrical drive
systems in various categories.
RFI filters are capacitive accessory components. RFI filters reduce conducted noise
•
emissions. RFI filters are also called EMC filters.
Mains filters are a combination of mains choke and RFI filter. Mains filters reduce the
•
conducted noise emission.
Definition of the environments
(EN 61800−3)
First environment
The first environment comprises residential buildings or locations that are directly connected
to a low-voltage system for supplying residential areas.
Second environment
The second environment comprises facilities or locations that are not directly connected to a
low-voltage system for supplying residential areas.
Category C1
Category C1 defines the requirements for drive systems that are intended for the use in the
first environment at a rated voltage lower than 1000 V.
The limit values of the EN 61800−3 comply with EN 55011 class B.
Category C2
Category C2 defines the requirements for permanently installed fixed drive systems that are
intended for the use in the first environment at a rated voltage lower than 1000 V. Installation
and commissioning may only be carried out by specialist personnel with EMC knowledge.
The limit values of the EN 61800−3 comply with EN 55011 class A group 1.
Category C3
Category C3 defines the requirements for drive systems that are exclusively intended for the
use in the second environment at a rated voltage lower than 1000 V.
The limit values of the EN 61800−3 comply with EN 55011 class A group 2.
When working with stricter line-bound noise emission requirements which
cannot be met using the radio interference suppression measures integrated in
the inverter, external filters can be used. The filters can be installed below or
next to the inverter.
If necessary, the internal filters have to be deactivated when external filters are
used. For this purpose, remove the IT screws of the inverters.
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