Table of Contents
Advertisement
DOK-INDRV*-FCS01******-IT01-EN-P
Rexroth IndraDrive Fc Drive Controllers Frequency Converters FCS01
5
Instructions for Use
5.1
Wiring Directives
5.1.1
General Information
LSA Control S.L. www.lsa-control.com comercial@lsa-control.com (+34) 960 62 43 01
The frequency converters have been developed for operation in an industrial
environment. In this environment, the frequency converter may be exposed to
high degrees of electromagnetic interferences. Usually, correct installation
guarantees smooth operation free of trouble and risks. To ensure that the lim‐
it values of the EMC directives are complied with, the following aspects
should be observed.
●
Make sure that all devices in the control cabinet or in the field are groun‐
ded as specified, by means of short grounding lines with a large cross-
section which are connected to a common grounding point or ground
bus. It is very important that each control unit (e.g. automation device)
connected to the frequency converters is linked by means of a short line
with a large cross-section to the same grounding point as the converter.
Flat lines (e.g. metal U-clamps) are preferable as their impedance with
high frequencies is lower. If possible, the PE conductor of the motor
controlled by the frequency converter should be connected directly to
the ground connection linked to the heat sink, together with the PE of
the supply feeder of the respective frequency converter. Usually,
smooth operation is guaranteed if a central ground bus is provided and
all equipment grounding conductors are connected to this bus.
See also chapter 6 "EMC Measures for Design and Installation"
●
Use shielded lines for control circuits where possible. The shield should
terminate at the end of the line. Make sure that the wires do not run un‐
shielded over long distances.
●
The shield of the control lines should be grounded only on the frequency
converter side.
●
Run the control lines separately from the load lines if possible, by using
separate cable ducts etc. Lay cables at crossing points at 90° angles if
possible.
●
Make sure that interference suppression has been provided for the con‐
tactors in the control cabinets, either - for a.c. contactors - by an RC cir‐
cuit or - for d.c. contactors - by free-wheeling diodes. Note that the inter‐
ference suppressors must be mounted to the contactor coils. Varistors
are also effective for overvoltage limiting. This interference suppression
is of special importance if the contactors are controlled by the relays in
the converter.
●
Use shielded or armored cables for the load connections (motor cables),
and ground the shielding/armor at both ends. Grounding must be effec‐
ted directly on the well conducting mounting plate of the control cabinet
or the EMC kit shield angle.
●
When the drive is to be operated in an environment sensitive to electro‐
magnet interference, we recommend that you use radio interference fil‐
ters (observe degree of protection) to limit the conducted and radiated
interferences of the frequency converter. Mount the filter as close as
possible to the converter and ground it well.
●
Furthermore, it is imperative to observe the directives for EMC-compati‐
ble wiring.
See also chapter 6 "EMC Measures for Design and Installation"
Bosch Rexroth AG
33/69
Instructions for Use
Advertisement
Table of Contents
