G&L MMC-A2, Руководство по оборудованию

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CE and EMC Guidelines
G & L Motion Control Inc. MMC Hardware Manual 159
11.4 Classes of EMC Operating Environments
Before the correct level of EMC can be designed into equipment, the EMC
operating environment must be defined. For example in industrial locations
where high power equipment is in use, high levels of background electrical
noise would be expected when compared to a household or office
environment. Since it is more expensive to reduce the emissions from higher
power equipment than to increase the immunity, the emission limits allowed
in industrial environments are higher than for household or office
environments. Vice versa for immunity because of the higher emission
limits in industrial environments, the immunity requirements are more strict
than for the household or office environment. Hence in order to achieve
EMC between different equipment, it is essential to know what EMC
operating environment it is to be installed in, and to compare the installation
environment to the environment for which it was designed.
Today using generic EMC standards, two environments are defined:
1. Industrial
2. Residential, commercial, and light industrial
The environments are locations defined on the basis of whether the AC
supply is shared with other locations or is buffered from them with a
distribution transformer. If your location is buffered via a distribution
transformer, then you are in an industrial environment. If you share your AC
supply with a neighboring location, then you are in a residential,
commercial, or light industrial environment. For example, an industrial unit
which shares its AC supply with a neighboring unit is defined as a
residential, commercial, and light industrial location. If it is supplied from
its own distribution transformer, then it is an industrial location.