Rfi Filter Recommendations And Data - Control Techniques Commander SE11200025 Guia Del Usuario

Terminal block within enclosure
Refer to Figure 4.13.
Figure 4.13 Connecting the motor cable to a terminal block in the enclosure.
Using a motor isolator switch
Refer to Figure 4.14.
Figure 4.14 Connecting the motor cable to an isolating switch.
4.5.4

RFI filter recommendations and data

Use one RFI filter for each drive. Filters of appropriate current rating may be shared
between drives, but small deviations from the stated standards may then occur.
The filter performance depends upon the motor cable length and switching frequency.
The filter performance for the maximum motor cable length for residential and industrial
standards is shown in Table 4.5 to Table 4.14. For further details on filter performance
with shorter cable lengths, see the EMC Data sheets which are available from Control
Techniques' Drive Centres or Distributors.
High ground leakage current
Most RFI filters have ground leakage current exceeding 3.5mA. All equipment
using these filters must be provided with a permanent fixed ground connection.
WARNING
Special low-leakage filters are provided for applications where a permanent ground
connection is not practical.
Commander SE User Guide
Issue Number 9
From the Drive
To the motor
Isolator
From the
Drive
Coupling bar
www.controltechniques.com
Back-plate
Enclosure
To the
motor
(If required)
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