Second Environment, Industrial Area
Facilities not directly connected to a low-voltage mains to supply buildings in
residential areas.
If the limit values in an industrial area separated from public supply by a
transformer station only have to be complied with at the property boundary or
in the neighboring low-voltage mains, the filter might not be necessary. In the
vicinity such as measuring sensors, measuring lines or measuring devices, it is
normally required to use the interference suppression filter.
Increasing the noise immunity of a sensitive device can often be the
economically better solution compared to measures of interference suppression
at the drive system of installation.
First Environment
Environment containing residential areas and facilities directly connected,
without interstage transformer, to a low-voltage mains supplying buildings in
residential areas.
Medium-sized manufacturing plants and industrial establishments can be
connected to the public low-voltage mains together with residential buildings. In
this case there is a high risk for radio and television reception if there are not
any measures for radio interference suppression taken. Therefore, the indicated
measures are generally recommended.
Nominal Current of Supply Mains
The nominal current of the supply mains (＞ 100 A or ≤ 100 A) is specified by the
local power supply company at the connection point of the mains. For industrial
companies, for example, such connection points are the interconnecting stations
from the power supply company.
Since it is impossible to obtain the lower limit values for residential areas with
all applications by means of usual measures (like in the case of large and
electrically not closed installations, longer motor cables or a large number of
drives), the following note included in EN 61800-3 has to be observed.
According to standard EN 61800-3:
● The drive system of standard EFC x610 with internal EMC filter, is
product of category C3 and applicable to industrial environment.
● The drive system of EFC x610 with external EMC filter, is product
of category C1 and applicable to residential environment.
Frequency Converter EFC x610 with external EMC filter can be used in a
residential environment (category C1), which however may cause radio
interference. In this case, supplementary mitigation measures may be required.
Bosch Rexroth AG
Electromagnetic Compatibility (EMC)
EFC x610 Series
70/389
DOK-RCON03-EFC-X610***-IT05-EN-P
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