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80
Affinity User Guide
www.controltechniques.com Issue Number: 5
Loosen the ground connection nuts and slide the grounding bracket in
the direction shown. Once in place, re-tighten the ground connection
nuts.
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.
When a size 4 or 5 is through-panel mounted, the grounding link bracket
must be folded upwards. A screw can be used to secure the bracket or it
can be located under the mounting bracket to ensure that a ground
connection is made. This is required to provide a grounding point for the
grounding bracket as shown in Figure 4-18.
Figure 4-18 Size 4 and 5 grounding link bracket in its surface
mount position (as supplied)
Figure 4-19 Size 4 and 5 grounding link bracket folded up into its
through- panel mount position
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 used as a motoring drive as part of a Unidrive SP 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 to be met for the second environment
- see section 4.11.4
Compliance with EN 61800-3:2004 (standard for
on page 83 and section 12.1.23
on page 245. 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 28mA for size 1 to 3 or 56mA for size 4 to 6 is unacceptable.
See Figure 4-20 and Figure 4-21 for details of removing and installing
the internal EMC filter.
On size 1 and 2, the grounding bracket is secured using the
power ground terminal of the drive. Ensure that the supply
ground connection is secure after installing / removing the
grounding bracket. Failure to do so will result in the drive not
being grounded.
WARNING
Grounding
link bracket
For frame sizes 3 and above, when the drive is used with
ungrounded (IT) supplies the internal EMC filter must be
removed unless additional motor ground fault protection is
installed or, in the case of size 3 only, the external filter is
also used.
For instructions on removal, refer to Figure 4-20 and Figure
4-21.
For details of ground fault protection contact the supplier of
the drive.
Grounding
link bracket
Mounting
bracket
WARNING
Summary of Contents for Affinity
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