Nidec Commander C200 Power Installation Manual page 71

Figure 4-11 Installation of control grounding bracket (all sizes -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.
4.12.2 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 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 section 4.12.2. For details of ground fault protection
contact the supplier of the drive.
WARNING
If the drive is used as a motoring drive as part of a regen system, 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+A1:2012 to be met for the
second environment - see section 4.12.4 Compliance with EN 61800-3: 2004+A1:2012 (standard for
Power Drive Systems) on page 75 and section 5.1.25 Electromagnetic compatibility (EMC) on
page 101. For longer motor cables the filter continues to provide a useful reduction in emission
levels, 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 where the ground
leakage current of 28 mA for size 5 and 6 is unacceptable. See section 4.12.2 for details of removing
and installing the internal EMC filter.
Unidrive M/HS Frame 5 to 6 Power Installation Guide
Issue Number: 8
71