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90 Powerdrive F300 User Guide
Issue Number: 2
Figure 4-24 Installation of grounding clamp (size 5)
Loosen the ground connection nuts and slide the grounding clamp down
onto the pillars 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).
Figure 4-25 Installation of grounding clamp (size 6)
The grounding clamp is secured using the provided 2 x M4 x 10 mm
fasteners. The fasteners should be tightened with the maximum torque
of 2 N m (1.47 Ib ft).
Figure 4-26 Installation of 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 0 V to ground should the user require to do so.
4.10.2 Internal EMC filter
It is recommended that the internal EMC filter be kept in place unless
there is a specific reason for removing it.
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 4.10.5 Compliance with EN 61800-3:2004 (standard for
Power Drive Systems) on page 94 and section 12.1.26 Electromagnetic
compatibility (EMC) on page 255. 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 3 is unacceptable. See section 4.10.2
for details of removing and installing the internal EMC filter.
On size 3 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.
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 4.10.2.
For details of ground fault protection contact the supplier of
the drive.
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