Standards Compliance
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Table 7–1 Maximum motor cable length allowed for conducted and radiated interference
Product Model Maximum Cable Length for Conducted
Emission
Maximum Cable Length for Radiated Emission
Category C1 Category C1
Built‑in filter External EMC filter Built‑in filter External EMC filter
Single‑phase products ‑ 50 m ‑ 50 m
Table 7–2 Maximum motor cable length allowed for conducted and radiated interference
Product Model Maximum Cable Length for Conducted
Emission
Maximum Cable Length for Radiated Emission
Category C2 Category C2
Built‑in filter External EMC filter Built‑in filter External EMC filter
Three‑phase products ‑ 50 m ‑ 50 m
Introduction to EMC Standard
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.
Therefore, EMC includes the following requirements:
● The electromagnetic interference generated by the equipment in the normal
operation process cannot exceed a certain limit.
● The appliance has certain electromagnetic interference in the environment. The
degree of immunity, ie electromagnetic sensitivity.
EN IEC 61800‑3 defines the following two environments:
● First Environment: This includes domestic premises, and establishments that
share a low‑voltage power supply network with buildings used for domestic
purposes.
● Second Environment: This includes all establishments other than those directly
connected to a low‑voltage power supply network which supplies buildings used
for domestic purposes.
According to the expected use environment, the products are divided into the
following four categories:
● Equipment Category C1: power drive system (PDS) of rated voltage less than 1000
V, intended for use in the first environment
● Equipment Category C2: PDS of rated voltage less than 1000 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 person
● Equipment Category C3: PDS of rated voltage less than 1000 V, intended for use in
the second environment and not intended for use in the first environment
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