Mains filters
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Mains filters
What this chapter contains
This chapter describes how to select and install mains filters for the ACSM1-04. The
chapter also contains the relevant technical data.
When is a mains filter required?
The EMC product standard (EN 61800-3 + Amendment A11 (2000)) covers the
specific EMC requirements stated for drives (tested with motor and cable) within the
EU. The new revision of 61800-3 (2004) product standard can be applied from now
on, but from 1st October 2007 at the latest. EMC standards such as EN 55011 or
EN 61000-6-3/4 apply to industrial and household equipments and systems
including drive components inside. Drive units complying with the requirements of
EN 61800-3 are always compliant with comparable categories in EN 55011 and
EN 61000-6-3/4, but not necessarily vice versa. EN 55011 and EN 61000-6-3/4 do
neither specify cable length nor require a motor to be connected as a load. The
emission limits are comparable according to the following table.
A mains filter is required in order to meet the category C2 level with the ACSM1 drive
installation, including a motor with a max. 50 m cable. This level corresponds to the
A limits for Group 1 equipment according to EN 55011.
WARNING! A mains filter must not be installed if the drive is connected to an IT
power system (i.e. an ungrounded, or a high resistance grounded [over 30 ohm]
power system).
EMC standards in general
EN 61800-3/A11 (2000), product
standard
EN 61800-3 (2004),
product standard
EN 55011, product family
standard for industrial,
scientific and medical (ISM)
equipment
1st environment,
unrestricted distribution
Category C1 Group 1 Class B
1st environment,
restricted distribution
Category C2 Group 1 Class A
2nd environment,
unrestricted distribution
Category C3 Group 2 Class A
2nd environment,
restricted distribution
Category C4 Not applicable
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