User Guide

16 Installation Honeywell
4
4.1.2 Cooling
Forced air flow cooling is used in all SmartVFD Compact drives.
Enough free space must be left above and below the frequency converter to ensure
sufficient air circulation and cooling. The required dimensions for free space are giv-
en in the table below:
4.1.3 EMC levels
SmartVFD Compact frequency converters are divided into five classes according to
the level of electromagnetic disturbances emitted, the requirements of a power sys-
tem 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 1000V and which are intended for use in the 1st environment. NOTE: The re-
quirements of class C are fulfilled only as far as the conducted emissions are con-
cerned.
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 con-
verters in fixed installations and the rated voltage of which is less than 1000V. The
class H frequency converters can be used both in the 1st and the 2nd environment.
Category C3: Frequency converters of this class comply with the requirements of
category C3 of the product standard EN 61800-3 (2004). Cateory C3 includes con-
verters the rated voltage of which is less than 1000V and which are intended for use
in the second environment only.
Type Dimensions (inch)
AB
MI1 3.9 2.0
MI2 3.9 2.0
MI3 3.9 2.0
Table 4.2 : Dimensions required for cooling
Type Cooling air required (CFM)
MI1 5.89
MI2 5.89
MI3 17.7
Table 4.3 : Required cooling air
A
B
mk6.fh11
Honeywell