Certification and Standard Compliance
‑184‑
Note
● 1*: Add the magnetic ring DY644020H to the input side of the AC drive.
● 2*: Add the magnetic ring DY644020H to the input and outside sides of the AC
drive.
● 3*: Add the magnetic ring DY644020H and simple filter Cxy‑1‑1 to the input side of
the AC drive.
● 4*: Add the magnetic ring DY805020H to the input and outside sides of the AC
drive.
● 5*: Add the magnetic ring DY1207030H to the outside side of the AC drive.
● 6*: Add the magnetic ring NC‑0567‑L‑b to the outside side of the AC drive.
Introduction to EMC standards
Electromagnetic compatibility (EMC) describes the ability of electrical and electronic
devices to work properly in the electromagnetic environment without introducing
electromagnetic interferences that disturb the operation of other local devices or
systems. Therefore, EMC includes the following requirements:
● The electromagnetic interference generated by a device during normal operation
must be restricted within a certain limit.
● The device must have sufficient immunity to electromagnetic interference in the
environment and can work properly in the environment with electromagnetic
interference, which is described as electromagnetic sensitivity.
EN IEC 61800‑3 defines the following two environments:
● First environment: It includes domestic premises. It also includes establishments
directly connected without intermediate transformer to a low‑voltage power
supply network which supplies buildings used for domestic purposes.
● Second environment: It includes all establishments other than those directly
connected to a low‑voltage power supply network which supplies buildings used
for domestic purposes.
Devices are divided into the following four categories based on the intended
application environment.
● C1 equipment: power drive system (PDS) with the rated voltage lower than 1000 V,
which is intended for use in the first environment
● C2 equipment: PDS with the rated voltage lower than 1000 V, which is neither a
plug‑in device nor a movable device and and is intended to be installed and
commissioned only by professionals when used in the first environment.
● C3 equipment: PDS with the rated voltage lower than 1000 V, which is intended for
use in the second environment and not intended for use in the first environment
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