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98 HVAC Drive H300
Issue Number: 3
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 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.
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 Compliance with EN 61800-3:2004 (standard for
Power Drive Systems) on page 101 and section
12.1.24 Electromagnetic compatibility (EMC) on page 280. 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 4.11.2 for details of removing and installing
the internal EMC filter.
Figure 4-27 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).
Figure 4-28 Removal of the size 4 internal EMC filter
To electrically disconnect the Internal EMC filter, remove the screw as
highlighted above (1).
Figure 4-29 Removal of the size 5 internal EMC filter
Remove the three M4 terminal nuts (1). Lift away the cover (2) to expose
the M4 Torx internal EMC filter removal screw. Finally remove the M4
Torx internal EMC filter removal screw (3) to electrically disconnect 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 4.11.2.
For details of ground fault protection contact the supplier of
the drive.
The supply must be disconnected before removing the
internal EMC filter.
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