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Electromagnetic Compatibility (EMC)
9.3 EMC Measures for Design and Installation
9.3.1 Rules for Design of Installations with Drive Controllers in Compli-
ance with EMC
The following rules are the basics for designing and installing drives in compli-
ance with EMC:
Mains Filter
Correctly use a mains filter recommended by Rexroth for radio interference sup-
pression in the mains supply of the drive system.
Control Cabinet Grounding
Connect all metal parts of the cabinet with one another over the largest possible
surface area to establish a good electric connection. This, too applies to the
mounting of the external mains filter. If required, use serrated washers which
cut through the paint surface. Connect the cabinet door to the control cabinet
using the shortest possible grounding straps.
Line Routing
Avoid coupling routes between lines with high potential of noise and noise-free
lines; therefore, signal, mains and motor lines and power cables have to be rout-
ed separately from another. Minimum distance: 10 cm. Provide separating
sheets between power and signal lines. Ground separating sheets several times.
The lines with high potential of noise include:
Lines at the mains connection (incl. synchronization connection)
●
Lines at the motor connection
●
Lines at the DC-bus connection
●
Generally, interference injections are reduced by routing cables close to groun-
ded sheet steel plates. For this reason, cables and wires should not be routed
freely in the cabinet, but close to the cabinet housing or mounting panels. Sepa-
rate the incoming and outgoing cables of the radio interference suppression fil-
ter.
Interference Suppression Elements
Provide the following components in the control cabinet with interference sup-
pression combinations:
Contactors
●
Relays
●
Solenoid valves
●
Electromechanical operating hours counters
●
Connect these combinations directly at each coil.
Bosch Rexroth AG R912005854_Edition 09
Rexroth Frequency Converter EFC x610
Series
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