Parker LVD1 - Mains Filter Installation Instructions

Parker Hannifin S.p.A. - Divisione S.B.C. LVD User’s Manual
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2.3 Mains filter installation instructions
To obtain electromagnetic compatibility in compliance with established standards, EMC
requirements are of critical importance when designing control panel configuration. To get the
best results from the filters, follow the instructions in this chapter carefully, because
Avoid:
- routing noise emitting cables in parallel with "clean" cables
- parallel cables, especially in the vicinity of the filter (ensure physical separation)
- cable loops (keep cables as short as possible and close to the common potential).
Additional measures:
- With the exception of mains cables to the filter, all power and control wiring must be
screened and, wherever possible, kept segregated (minimum distance 20 cm). If control and
power cables must cross, the intersection must be at a right angle.
- Shielded cables must be installed on a copper bar by means of a high conductivity wire
clamp. The area of contact must be as large as possible and the shield must be unbroken. In
general the shield should be connected at each extremity. In certain circumstances, however,
control cable shields may be connected only at one end to eliminate mains hum that could
interfere with the control signal. Decide case by case as numerous factors must be considered.
Adopt the following general approach: if the screen is solely for shielding, connect at both ends.
If current flowing in the shield interferes with the shielded signals, connect at one end only.
- The incoming cable must be connected to an earth terminal by means of a screw to ensure
proper contact between screen and earth.
- RF interference suppression filters must be installed as close as possible to the drive and
must have a large area of contact with the power panel or the mounting plate. Remove all paint.
The filter earth terminal must be connected to the earth bar along the shortest possible route. It is
the installer's responsibility to protect the filter terminals.
- As far as possible keep the power side (drive) and control side (PLC or NC) physically
separated by separating the metal mounting plates. Do not route any cables through the
mounting plates.
even a complex and expensive filter is ineffective unless it is
installed taking EMC aspects into consideration!