Baumuller b maXX BM3400 Series - Measures for EMC Assurance

Measures for EMC assurane 6.8T
6.8 Measures for EMC assurane
The assembly of the single modules and components in the switching cabinet is decisive for the EMC. The
notes on the following pages make it possible to c onfi gure the installation due to the latest EMC knowledge
and therewith to follow legal regulations.
In the b maXX® BM3400 semiconductors are used, which minimize the power loss in the unit by quick
switching and therewith make a small size possible. These semiconductors generate electromagnetical waves
by switching quickly. Therefore, at operation of the b maXX® BM3400 certain preconditions must be com-
plied with, in order to avoid electromagnetic influences due to switching operations. Interferences can arise
throughout all areas of the drive system and originate in the following:
• Capacitive discharge currents, whose cause are the steep switching edges of the semiconductors.
• High currents and steep edges in the motor cab les. The bonded interference energy in the magnetic
fields covers frequencies of a few hertz up to about 30MHz. Due to the high voltage gradients addition-
ally electromagnetic fields with frequencies up to 600MHz occur.
• High clock-pulse rates and quick logic switchings (electromagnetical field with frequencies of 16MHz
to 1GHz) .
• Harmonic effects on the supply and harmonics. The cause for these are commutation procedures and
not sinusoidal mains loading especially at line-commutated converters (100Hz to 20kHz).
NOTE
The emission of radio interferences is to a high level dependent on the wiring, the volume ex-
pansion and the arrangement of the components in the installation. That is why the assurance
of the electromagnetical compatibility according to the statutory provisions only is possible on
the completed installation and therefore is in the responsibility range of the manufacturer of
the installation or of the operating authority (EMVG § 6, sec.9)
6.8.1 Cabling
• For suppression of the interfering radiation outside of the converter you basically must screen all con-
nected cables. If the shielding effectiveness of the switching cabinet is high enough (see radio intef-
erence limit value according to the EMVG for your installation) and the EMC in the interior space is
guaranteed (this may be assumed if you have complied with all c onfi guration notes), you may also
mount unscreened control cab les. Also refer to the information under «Screening» on page 65.
• Use a Baumüller mains filter BFN provided that the device is not equipped with an internal mains filter.
Instrution Manual b maXX ® BM3400 61
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