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Unidrive User Guide
45
Issue Number: 9 www.controltechniques.com
In order to ensure the installation meets the various emission / immunity
standards described in:
•
The EMC data sheet
•
The Declaration of Conformity at the front of this manual
•
The correct RFI filter must be used and all of the guidelines in section
4.8.1
4.8.1 EMC - General requirements
Figure 4-8 General EMC enclosure layout showing earth / ground
connections
When a RFI filter is used, a permanent fixed ground
connection must be provided which does not pass through a
connector or flexible power cord.
WARNING
Optional
ground
connection
External
controller
0V
If the control circuit 0V
is to be grounded, this
should be done at the
system controller only to
avoid injecting noise
currents into the 0V circuit
Metal backplate
Grounding bar
PE
~
PE
If ground connections are
made using a separate
cable, they should run
parallel to the appropriate
power cable to minimise
emissions
Use four core cable to
connect the motor to the drive.
The ground conductor in the
motor cable must be connected
directly to the earth terminal of
the drive and motor.
It must not be connected directly
to the power earth busbar.
The incoming supply ground
should be connected to a
single power ground bus bar
or low impedance earth
terminal inside the cubicle.
This should be used as a
common 'clean' ground for all
components inside the cubicle.
3 phase AC supply
Optional EMC
filter
Metal backplate
safety bonded to
power ground busbar
Содержание Unidrive 1 Series
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