70
Unidrive M702 User Guide
Issue Number: 3
Figure 4-21 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 4-22 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.
4.12.2 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 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 to be met for the second environment
- see section 4.12.4
Compliance with EN 61800-3:2004 (standard for
on page 74 and section 12.1.26
on page 244. 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
4.12.2
on page 70 for details of removing and
installing the internal EMC filter.
Figure 4-23 Removal of the size 3 internal EMC filter
Remove the screw and nut (1) and (2) as shown above.
Lift away from the securing points and rotate away from the drive.
Ensure the screw and nut are replaced and re-tightened with a
maximum torque of 2 N m (1.47 lb ft).
On size 3 and 4 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 4.12.2
For details of ground fault protection contact the supplier of
the drive.
The supply must be disconnected before removing the
internal EMC filter.
WARNING
WARNING
WARNING
Summary of Contents for Unidrive M702
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