5-22
Planning the cabinet
DKR Drive Controllers
DOK-DIAX03-DKR********-PR02-EN-P
5.6
Measures to avoid sources of interference in the control
cabinet
CAUTION
Failure and malfunction caused by interference
signals!
⇒
Observe the following instructions, in order to avoid
electromagnetic or lead-related interference signals.
If inductive loads, e.g., chokes, contactors or relays, must be switched
with the use of a contact or semi-conductor, then these must be shielded:
⇒
Use recovery diodes with direct current.
⇒
Use contactor-type related resistance-capacitance coupling with
alternating current.
⇒
Attach shielding directly to the inductance. Not doing so could
considerably reduce the shielding effects.
⇒
Do not use varistors as protective circuits.
If high-frequency equipment is used in the plant, e.g., components of
anodizing equipment, then:
⇒
situate and wire such equipment outside of the cabinet.
To maintain the limit values for class B (interference suppression level N)
as per DIN
VDE
0470-1, edition dated
11.92 and table
I as per
DIN EN 55 014, edition dated 12.93, at the machine, in particular when
operating such in light industrial or residential areas, then the following
applies:
•
Route the motor power cable separately
- or -
use shielded motor power cable.
•
Mount and operate a suitable interference suppression filter in the
power supply lead of the machine or plant.
Note:
For further details, please see the Project Planning Manual on
"Electromagnetic Compatibility (EMC) of AC Drives".
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