Mains voltage
Enclosure size
IP21 (UL Type 1)
IP54 (UL Type 12)
525–690 V
FR10 Standalone
x
x
525–690 V
FR11 Standalone
x
–
3.7 Available EMC Classes
The product standard (EMC immunity requirements) IEC/EN 61800-3 + A1 has 5 categories. The VACON
®
AC drives are divided into 5
EMC classes that have equivalents in the standard. All VACON
®
NX AC drives comply with the standard IEC/EN 61800-3 + A1.
The type code tells which category requirement the AC drive complies with (see
3.4 Description of the Type Code
).
The category changes when these properties in the AC drive change:
•
the level of electromagnetic disturbances
•
the requirements of a power system network
•
the installation environment (see the standard IEC/EN 61800-3 + A1)
Table 5: Available EMC Classes
EMC class
in IEC/EN
61800-3 +
A1
VACON
®
equiva‐
lent
EMC
class
Description
Available for
C1
C
The best EMC protection. These AC drives have the nominal voltage of less than
1000 V. They are used in the 1st environment.
NOTICE
If the protection rating of the AC drive is IP21 (UL Type 1), only the conducted
emissions are in the requirements of category C1.
380–500 V, FR4
to FR6, IP54 (UL
Type 12)
C2
H
Includes AC drives in fixed installations. These AC drives have the nominal voltage of
less than 1000 V. The category C2 AC drives can be used in the 1st and the 2nd envi-
ronment.
380–500 V, FR4
to FR9 and 208–
240 V, FR4 to
FR9
C3
L
Includes AC drives that have the nominal voltage of less than 1000 V. These AC
drives are used in the 2nd environment only.
IP21 (UL Type 1)
and IP54 (UL
Type 12) in
380–500 V FR10
and larger, 525–
690 V FR6 and
larger
Product Overview
Operating Guide | VACON® NXS/NXP Air-cooled
AQ275638903263en-000301 / DPD00910| 23
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