Parker Hannifin S.p.A S.B.C. Division
SLVDN User’s Manual
Page 48 of 181
5.17.4.
Mains and motor side filters
It is usually necessary to use external filters in addition to internal filters the drive is provided
with, on the mains input and sometimes on the motor output.
The mains filter must be mounted as close as possible to the drive and on the same drive
panel, and must have a large area of contact with the power panel or the mounting plate.
If distance exceeds 30cm, the effect decreases and a screened cable must be used between
filter and converter.
The filter earth terminal must be connected to the earth bar along the shortest possible route.
With SLVD-N series the utilization of the external filters depend of the model and the sistem
supply, the following char shows the different courses:
supply
model
three-phase by transformer with
electrostatic shield (*)
mono-phase with transformer (*)
three-phase direct connection or
auto-transformer
mono-phase direct connection
SLVD1N
SLVD2N
SLVD5N
Up to 20 meters without external filter
SLVD7N
Up to 10 meters without external filter
SLVD10N
SLVD15N
SLVD17N
Up to 30 meters without external filter
External filter necessary
(*) secondary connected to ground
Ferrite toroids are generally used for the motor output, with multiple turns obtained by
winding the 3 motor cables contemporarily.