Honeywell SmartVFD HVAC2 Applications Manual page 21

EMC levels
EN61800-3 defines the division of frequency
converters into four classes according to the level
of electromagnetic disturbances emitted, the
requirements of a power system network and the
installation environment (see below). The EMC
class of each product is defined in the type
designation code.
Category C1:
Frequency converters of this class
comply with the requirements of category C1 of
the product standard EN 61800-3 (2004).
Category C1 ensures the best EMC
characteristics and it includes converters the
rated voltage of which is less than 1000 V and
which are intended for use in the 1st
environment.
NOTE: The requirements of class C are fulfilled
only as far as the conducted emissions
are concerned.
Category C2:
Frequency converters of this class
comply with the requirements of category C2 of
the product standard EN 61800-3 (2004).
Category C2 includes converters in fixed
installations and the rated voltage of which is less
than 1000 V. The class C2 frequency converters
can be used both in the 1st and the 2nd
environment.
Category C4:
The drives of this class do not
provide EMC emission protection. These kinds of
drives are mounted in enclosures.
Environments in product standard EN 61800-3
(2004)
First environment:
domestic premises. It also includes
establishments directly connected without
intermediate transformers to a low-voltage power
supply network which supplies buildings used for
domestic purposes.
NOTE: Houses, apartments, commercial prem-
ises or offices in a residential building
are examples of first environment loca-
tions.
Second environment:
all establishments other than those directly
connected to a low-voltage power supply network
which supplies buildings used for domestic
purposes.
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Environment that includes
Environment that includes
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