Parker Hannifin S.p.A. Divisione S.B.C. user’s manual TWIN-N and SPD-N
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2.1.4 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.
The converter-filter connection cable length should not be over 30cm in order to maximise
efficiency.
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