Unidrive M / HS Frame 7 to 10 Power Installation Guide 77
Safety information Product information Mechanical installation
Electrical installation
Technical data UL listing information
Figure 4-12 Installation of control grounding bracket (all sizes -Unidrive M700 size 3 shown)
Loosen the ground connection nuts and slide the grounding bracket in the direction shown. Once in
place, the ground connection nuts should be tightened with a maximum torque of 2 N m (1.47 lb ft).
A faston tab is located on the grounding bracket for the purpose of connecting the drive 0V to ground
should the user require to do so.
4.11.2 Internal EMC filter
It is recommended that the internal EMC filter be kept in place unless there is a specific reason for
removing it.
If the drive is part of a regen system or it is connected to an IT supply then the internal EMC filter
must be removed.
The internal EMC filter reduces radio-frequency emission into the line power supply. Where the
motor cable is short, it permits the requirements of EN 61800-3:2004 to be met for the second
environment - see section 4.11.5 and section 5.1.24. For longer motor cables the filter continues to
provide a useful reduction in emission level, and when used with any length of shielded motor cable
up to the limit for the drive, it is unlikely that nearby industrial equipment will be disturbed. It is
recommended that the filter be used in all applications unless the instructions given above require it
to be removed or the ground leakage current of the drive is unacceptable.
When the drive is used with ungrounded (IT) supplies the internal EMC filter must be
removed unless additional motor ground fault protection is installed.
For instructions on removal, refer to Figure . Please note that the internal filter is not
removable on size 9E and 10E. For details of ground fault protection contact the supplier
of the drive.
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