Nord Drivesystems SK 300P Series - EMC Evaluation; Table 4: EMC Comparison between en 61800-3 and en 55011

8 Additional information
BU 0800 en-4521 135
8.1.2 EMC evaluation
Two standards must be observed when evaluating electromagnetic compatibility.
1. EN 55011 (environmental standard)
In this standard, the limit values are defined in dependence on the basic environment in which the
product is operated. A distinction is made between two environments, where the first environment
describes the non-industrial living and business area without its own high-voltage or medium-
voltage distribution transformers. The second environment defines industrial areas, which are
not connected to the public low-voltage network, but have their own high-voltage or medium-
voltage distribution transformers. The limit values are subdivided into classes A1, A2 and B.
2. EN 61800-3 (product standard)
In this standard, the limit values are defined in dependence on the usage area of the product. The
limit values are subdivided into categories C1, C2, C3 and C4, where class C4 basically only
applies to drive systems with higher voltage (≥ 1000 V AC) or higher current (≥ 400 A). However,
class C4 can also apply to the individual device if it is incorporated in complex systems.
The same limit values apply to both standards. However, the standards differ with regard to an
application that is extended in the product standard. The operator decides which of the two standards
applies, whereby the environmental standard typically applies in the event of a fault remedy.
The main connection between the two standards is explained as follows:
Category according to EN 61800-3
C1
C2
C3
Limit value class according to EN 55011
B
A1
A2
Operation permissible in
First environment (living environment)
X
X
1)
-
Second environment (industrial environment)
X
X
1)
X
1)
Note required in accordance with EN 61800-3
-
2)
3)
Distribution channel
Generally available
Limited availability
EMC expertise
No requirements
Installation and commissioning by EMC
expert
1)
Device used neither as a plug-in device nor in moving equipment
2)
“The drive system can cause high-frequency interference in a living environment that may make interference suppression measures
necessary.”
3)
“The drive system is not intended for use in a public low-voltage network that feeds residential areas.”
Table 4: EMC comparison between EN 61800-3 and EN 55011