Parker Hannifin S.p.A. - Divisione S.B.C. “SPD” User’s Manual
15
4.1.1
How to suppress interference
For the drive to meet the product requirements regarding electromagnetic compatibility, the
installation must be carried out according to the following instructions.
The criteria are essentially based on grounding, filtering and screening.
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. Ferrite toroids are generally
used for the motor output, with multiple turns obtained by winding the 3 motor cables
contemporarily.
4.1.2 Grounding and screening
In the electric panels where the drives are usually installed there are two ground systems:
- EMC ground, or HF reference (high frequency), represented by the wall made of non-
painted metal, onto which drives and filters are fixed.
- The safety ground, or PE (protective earth), according to the EN60204-1 standard
Fix drive and mains filters, the 24Vdc power supply etc. on the metal wall, making sure that
there is a proper electric contact (HF connection).
Carry the safety ground using cables having a minimum section of 10mm²
Ground the cables screened at both sides using the cable clamps connections as shown in the
drawing (at 360º)
Connection 360°
Use a screened cable to connect the drive to the motor
Use a screened cable both for the resolver connection and for the control signals.
Into the panel, connect the panels with one another using a copper strap.
