Danfoss VLT FCD 303 Operating Instructions Manual page 12

ATEX correct installation
The following issues must be taken into account when
installing the FCD 300 in ATEX zone 22 environments:
• Motor must be designed, tested and certified by the
motor manufacturer for variable speed application
• Motor must be designed for Zone 22 operation.
I.e. with type of protection "tD" acc. to
EN61241-0 and -1 or EN50281-1-1.
• Motor must be provided with thermistor protection.
The thermistor protection must either be connected
to an external thermistor relay, with EC Type
Examination Certificate or compatible with
the FCD 300 thermistor input.
If the FCD 300 thermistor protection is used,
the thermistor must be wired to terminals
31a and 31b, and thermistor trip acti v ated by
programming parameter 128 to thermistor trip
[2]. See parameter 128 for further details.
• Cable entries must be chosen for the enclosure
protection to be maintained. It must also be
ensured that the cable entries comply with the
requirements for clamping force and mechanical
strengths as described in EN 50014:2000.
• The FCD must be installed with appropriate earth
connecting according to local/national regulations.
• The installation, inspection and maintenance of
electrical apparatus for use in combustible dusts,
must only be carried out by personnel that is
trained and familiar with the concept of protection.
For a declaration of conformity, please consult
your local Danfoss representati v e.
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®
VLT FCD Series
MG.04.B7.02 - VLT is a registered Danfoss trademark