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EMC
MD380 User Manual
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Chapter 7 EMC
7.1 De fi nition of Terms
1) EMC
Electromagnetic compatibility (EMC) describes the ability of electronic and electrical
devices or systems to work properly in the electromagnetic environment and not to
generate electromagnetic interference that influences other local devices or systems.
In other words, EMC includes two aspects: The electromagnetic interference generated
by a device or system must be restricted within a certain limit; the device or system
must have sufficient immunity to the electromagnetic interference in the environment.
2) F irst environment
Environment that includes domestic premises, it also includes establishments directly
connected without intermediate transformers to a low-voltage power supply network
which supplies buildings used for domestic purposes
3) Second environment
Environment that includes all establishments other than those directly connected to a
low-voltage power supply network which supplies buildings used for domestic purposes
4) Category C1 AC drive
Power Drive System (PDS) of rated voltage less than 1 000 V, intended for use in the
first environment
5) Category C2 AC drive
PDS of rated voltage less than 1 000 V, which is neither a plug in device nor a movable
device and, when used in the first environment, is intended to be installed and
commissioned only by a professional
6) Category C3 AC drive
PDS of rated voltage less than 1 000 V, intended for use in the second environment
and not intended for use in the first environment
7) Category C4 AC drive
PDS of rated voltage equal to or above 1 000 V, or rated current equal to or above 400
A, or intended for use in complex systems in the second environment
7.2 Introduction to EMC Standard
7.2.1 EMC Standard
The MD380 series AC drive satisfies the requirements of standard EN 61800-3: 2004
Category C2. The AC drives are applied to both the first environment and the second
environment.