Compliance
‑150‑
Table 9–1 Maximum allowable motor cable length
Product
Model
Maximum Cable Length for Conducted Emission Maximum Cable Length for Radiation Conduction
C2 C3 C2 C3
Embedded
Filter
External
EMC Filter
Embedded
Filter
External
EMC Filter
Embedded
Filter
External
EMC Filter
Embedded
Filter
External
EMC Filter
T1 ‑ 3m 3m ‑ ‑ 3m 3m ‑
T2~T4 ‑ 1m* 1m ‑ ‑ 1m 1m ‑
T5~T8 ‑ 3m ‑ ‑ ‑ 3m ‑ ‑
T9~T12 ‑ 3m 3m ‑ ‑ 3m 3m ‑
Note*: For single‑phase T2 models, install a DY644020H magnetic ring on the input side of the filter.
Introduction to EMC standards
Electromagnetic compatibility (EMC) describes the ability of electronic and electrical
devices to work properly in the electromagnetic environment and not to generate
electromagnetic interference that influences nearby 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.
Based on the expected environment, the products are divided into the following four
categories:
● Category C1: a PDS with rated voltage less than 1000 V and intended for use in the
first environment
● Category C2: a PDS with rated voltage less than 1000 V, which is neither a plug in
device nor a movable device and is intended to be installed and commissioned
only by a professional.
● Category C3: a PDS with rated voltage less than 1000 V and intended for use in the
second environment.
● Category C4: a PDS with rated voltage equal to or above 1000 V, or rated current
equal to or above 400 A, or intended for use in complex systems in the second
environment.
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