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S
AFETY
a) the protective earthing conductor shall have a cross-sectional area of at least 10
2
mm
Cu or 16 mm
or
b) an automatic disconnection of the supply in case of discontinuity of the protective
earthing conductor. See chapter 4.
or
c) provision of an additional terminal for a second protective earthing conductor of the
same cross-sectional area as the original protective earthing conductor.
Cross-sectional area of phase conductors (
[mm
S
16
35 <
The values above are valid only if the protective earthing conductor is made of the same metal as
the phase conductors. If this is not so, the cross-sectional area of the protective earthing conductor
shall be determined in a manner which produces a conductance equivalent to that which results
from the application of this table.
Table 2. Protective earthing conductor cross-section
The cross-sectional area of every protective earthing conductor which does not form a part of
the supply cable or cable enclosure shall, in any case, be not less than
2
•
2.5 mm
if mechanical protection is provided or
2
•
4 mm
if mechanical protection is not provided. For cord-connected equipment, provi-
sions shall be made so that the protective earthing conductor in the cord shall, in the
case of failure of the strain-relief mechanism, be the last conductor to be interrupted.
However, always follow the local regulations for the minimum size of the protective
earthing conductor.
NOTE: Due to the high capacitive currents present in the drive, fault current protective switches
may not function properly.
Do not perform any voltage withstand tests on any part of the drive. There is a
certain procedure according to which the tests shall be performed. Ignoring this
procedure may result in damaged product.
1.4
EMC levels
SmartDrive HVAC inverters are divided into three classes according to the level of electromag-
netic 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 (Honeywell EMC class C): Inverters of this class comply with the requirements
of category C1 of the product standard EN 61800-3 (2004). Category C1 ensures the best EMC
2
Al.
2
]
16
35
S
S
Minimum cross-sectional area of the corre-
S
)
sponding protective earthing conductor
Honeywell
2
[mm
]
S
16
S
/2
• 4
1
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