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Diagnostics Optimization CT MODBUS RTU Technical Data
Installation and System Design Guide 111
Issue Number: 1
4.15 EMC (Electromagnetic compatibility)
The requirements for EMC are divided into three levels in the following
three sections:
• General requirements for all applications, to ensure reliable
operation of the drive and minimise the risk of disturbing nearby
equipment.
• Requirements for meeting the EMC standard for power drive
systems, IEC61800-3 (EN 61800-3:2004).
• Requirements for meeting the generic emission standards for
the industrial environment, IEC61000-6-4, EN 61000-6-4:2007.
• Elevator standards EN12015-2014 and EN12016:2013.
The recommendations will usually be sufficient to avoid causing
disturbance to adjacent equipment of industrial quality. If particularly
sensitive equipment is to be used nearby, or in a non-industrial
environment, then the recommendations of Requirements for meeting
the EMC standard for power drive systems or Requirements for
meeting the generic emission standards for the industrial
environment should be followed to give reduced radio-frequency
emission. For full details refer to section 2.11 EMC compliance (general
standards) on page 27.
In order to ensure the installation meets the various emission standards
described in:
• The EMC data sheet available from the supplier of the drive
The correct external EMC filter must be used for further details refer to
section 2.10 EMC filters on page 25.
N
The installer of the drive is responsible for ensuring compliance with the
EMC regulations that apply in the country in which the drive is to be
used.
4.15.1 Grounding hardware
The drive is supplied with a grounding bracket and grounding clamp to
facilitate EMC compliance. They provide a convenient method for direct
grounding of cable shields without the use of "pig-tails”. Cable shields
can be bared and clamped to the grounding bracket using metal clips or
clamps
1
(not supplied) or cable ties. Note that the shield must in all
cases be continued through the clamp to the intended terminal on the
drive, in accordance with the connection details for the specific signal.
1
A suitable clamp is the Phoenix DIN rail mounted SK14 cable clamp
(for cables with a maximum outer diameter of 14 mm).
• See Figure 4-24, Figure 4-25 and Figure 4-26 for details on installing
the grounding clamp.
• See Figure 4-27 for details on installing the grounding bracket.
Figure 4-24 Installation of grounding clamp (size 3 and 4)
Loosen the ground connection nuts and slide the grounding clamp 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 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).
High ground leakage current
When an EMC filter is used, a permanent fixed ground
connection must be provided which does not pass through a
connector or flexible power cord. This includes the internal
EMC filter.
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