Pilz PMCprotego D.72/000/0/0/2/208-480VAC - Manual (Page 122)

6.5 EMC-compliant wiring
6 Wiring
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
6-14
 Reduce a device's high frequency disturbances. These disturbances
are emitted via the the mains cable or via emissions from the mains
cable. The noise suppression filters limit the noise emissions to a
specified amount.
Filters have leakage currents which may be considerably greater than
the rated values in the event of a fault (phase failure, unbalanced load)
(see section entitled “Leakage current”).
Please note the following if additional filter measures are required:
 Earth the filter to avoid hazardous voltages
 Leakage currents are high frequency disturbances, so earth the filter
at low impedance over a wide area.
][EMV_Wohnumgebung
6.5.4 Chokes
Chokes 6- ][EMV_Drosseln
If motor cables are > 25 m, a choke must be used on the servo amplifi-
er's output.
The choke is used to:
 Reduce the level of interference on the motor cable
 Deal with EMC problems retrospectively
 Protect the semiconductor on the inverted rectifier in the case of an
earth fault or short circuit
 Protect the motor from high voltage rise rates
Additional earthing measures are unnecessary because, unlike filters,
chokes do not have to divert disturbances to earth.
][Funktion_Netzspannung_Drossel
WARNING!
In a residential environment this product may cause high-fre-
quency noise, so that suppression measures may be required.
INFORMATION
A 3L line choke with u
k
= 2% must be used in the event of a
mains voltage imbalance of > 3%. Install the line choke on the
mounting plate in a way that is EMC-compliant.