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Table 4:
Categories of intended use
Category
Definition
Limits to EN 55011
C1
Frequency inverters with a supply voltage under 1000 V installed in the first
environment (residential and office areas).
Class B
C2
Frequency inverters with a supply voltage under 1000 V installed in the first
environment (residential and office areas) that are neither ready to be plugged in/
connected nor are mobile and must be installed and commissioned by specialist
personnel.
Class A, Group 1
C3
Frequency inverters with a supply voltage under 1000 V installed in the second
environment (industrial environments).
Class A, Group 2
C4
Frequency inverters with a supply voltage over 1000 V and a nominal current
over 400 A installed in the second environment (industrial environments) or that
are envisaged for use in complex systems.
No borderline/
boundary
1)
The following limit values and inspection/test levels must be complied with if the generic
standard on interference emissions applies:
Table 5:
Classification of installation environment
Environment
Generic standard
Limits to EN 55011
First environment (residential and office areas)
EN/IEC 61000-6-3
for private, business and commercial
environments
Class B
Second environment (industrial environments)
EN/IEC 61000-6-4
for industrial environments
Class A, Group 1
The frequency inverter meets the following requirements:
Table 6:
EMC properties of the frequency inverter
Power
[kW]
Cable length
[m]
Category to EN 61800-3
Limits to EN 55011
≤ 11
≤ 5
C1
Class B
The EN 61800-3 standard requires that the following warning be provided for drive systems
that do not comply with category C1 specifications:
This product can produce high-frequency interference emissions that may necessitate
targeted interference suppression measures in a residential or office environment.
2.10.2 Line harmonics requirements
The product is a device for professional applications as defined by EN 61000-3-2. The
following generic standards apply when establishing a connection to the public power grid:
– EN 61000-3-2
for symmetric, three-phase devices (professional devices with a total power of up to
1 kW)
– EN 61000-3-12
for devices with a phase current of between 16 A and 75 A and professional devices
from 1 kW up to a phase current of 16 A.
2.10.3 Interference immunity requirements
In general, the interference immunity requirements for a frequency inverter hinge on the
specific environment in which the inverter is installed.
The requirements for industrial environments are therefore higher than those for residential
and office environments.
The frequency inverter is designed such that the immunity requirements for industrial
environments and, thus, the lower-level requirements for residential and office
environments, are met and fulfilled.
1
An EMC plan must be devised.
Summary of Contents for Hydro-Unit Utility Line F
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