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 IEC 61800-3, components of EFC 3600 drive system
are products of
● category C3: with internal EMC filter
● category C1: with external EMC filter
EFC 3600 frequency converter with internal EMC filter is applicable
to industrial environment (category C3). With installation of an
external EMC filter, EFC 3600 can fulfill C1 requirements.
The grounding of the internal EMC filter can be disconnected by
removal of the grounding screw, see chapter 5.11 "Grounding
Screw Removal of Internal EMC Filter" on page 31.
EFC 3600 Bosch Rexroth AG
Electromagnetic Compatibility (EMC)
DOK-RCON03-EFC-3600***-IT03-EN-P
147/259
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