Lenze Inverter EMC - Manual (Page 7)

EMC - legal foundation
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EDBEMV EN 1.3
2.3 EN 61800-3 requirements on interference emission
EN 61800-3 defines limit values depending on the environments at the place of use.
For the low-frequency range (< 9 kHz), limit values are defined for
z harmonics (EN 61000-3-2/-12)
z voltage fluctuations / flickering (EN 61000-3-3/-11)
z mains voltage commutation notches (EN 60146-1-1)
For the high-frequency range (> 9 kHz), limit values are defined for
z interference voltages (EN 55011 or EN 55022)
z interfering radiations (EN 55011 or EN 55022)
In addition to the functional task of a component, machine or system, EMC measures, too, must be
taken into consideration as early as during the planning phase. Only during that stage can EMC
measures be integrated with maximum cost efficiency. During the test phase or as late as during
operation, the possible measures are drastically reduced, resulting in rising costs (see section 1.2).
The ultimately responsible for adherence to the standards (CE mark) is the party who ” introduces
a machine or system to the market” . It is therefore essential that the manufacturer or builder of a
machine or system takes steps to ensure as early as during component acquisition that EMC
measures are considered and information is available as to how to reach compliance with the EMC
Directive.
Interference level
Tolerance range of
immunity to interference
Interference level causing malfunctions:
Malfunctions of devices or systems
Interference level causing no malfunction
(threshold of immunity):
Standardised level of immunity to interference, up to
which a device or system operates without malfunction
Electromagnetically compatible interference level:
Maximum interference level to be expected in any
environment
Interfering radiation limit:
Maximum interfering radiation level which a
device is allowed to emit
Frequency
Fig. 2 Requirements for interference emission
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