Installation
page 56
ELTROPLAN-REVCON
Use copper or tinned copper screened wires only, as steel screened wires are
not suitable for high frequency applications. Connect the screen with metal
clamps or metal glands to the equalisation bars or PE-connections. Don’t
elonger the screen with single wires!
If external RFI-filters are use, these have to be mounted not more than 30cm
away from the noise source and with a very good, low resistive based contact.
Inductive switching units (relay, magnetic contactor and so on) have to be
equipped with varistors, RC-circuits or suppressor diodes always.
All connections have to be as short as possible and must lay as close to the
ground potential as possible, as free hovering wires act like aerials.
Avoid wire loops in all wires. Connect unused wires to ground at both ends.
If unscreened wires are used, intertwist the pairs to attenuate unsymmetrical
noise.
4.6.2
Connection of a RFI-filter
The following figure shows mounting and connection of an external RFI-filter.
Netzleitung
Funkentstörfilter flächig
mit der Montageplatte
verbunden
Potentialausgleich zur
Gebäudeerde
Gefilterte Leitung zum
Frequenzumrichter
Schutzleiter angeschlossen
Schirmschiene aus Kupfer, flächig
mit der Motageplatte verbunden
Montageplatte
Zusätzliches Masseband
Filtered wire to controller
RFI-filter connect to mounting
plate with big surface
Potential equalisation to
building ground
Mains wire
Screen busbar connected to mounting
plate with big surface
Additional grounding bond
Mounting plate
Connected protective wire