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3-1
Before installation
3-2
Cable connections
3-2-1
Mains cables
The description of installation in this chapter complies with the EMC stan-
dards and the Machine Directive.
Select cable type and screening according to the EMC requirements valid for
the environment where the VSD is installed.
Read the following checklist and think through your application before installa-
tion.
•
External or internal control.
•
Long motor cables (>100m), refer to section Long motor cables.
•
Motors in parallel, refer to menu [213].
•
Functions.
•
Suitable VSD size in proportion to the motor/application.
•
Mount separately supplied option boards according to the instructions in
the appropriate option manual.
If the VSD is temporarily stored before being connected, please check the
technical data for environmental conditions. If the VSD is moved from a cold
storage room to the room where it is to be installed, condensation can form on
it. Allow the VSD to become fully acclimatised and wait until any visible con-
densation has evaporated before connecting the mains voltage.
Dimension the mains and motor cables according to local regulations. The
cable must be able to carry the VSD load current.
Recommendations for selecting mains cables
•
To fulfil EMC purposes it is not necessary to use screened mains cables.
•
Use heat-resistant cables, +60C or higher.
•
Dimension the cables and fuses in accordance with local regulations and
the nominal current of the motor. See table 48, page 282.
PE conductor cross-sectional are shall for cable size 16mm
•
the used phase conductors, for cable size above 16mm
2
equal to 35mm
the PE conductor cross-sectional area shall be at least
2
16mm
. For cables > 35mm
should be at least 50% of the used phase conductor.
•
When the PE conductor in the used cable type is not in accordance with
the above mentioned cross-sectional area requirements, a separate PE
conductor should be used to establish this.
•
The litz ground connection see fig. 25, is only necessary if the mounting
plate is painted. All the variable speed drives have an unpainted back side
and are therefore suitable for mounting on an unpainted mounting plate.
2
the PE conductor cross-sectional area
SECTION 3
Installation
2
be equal to
2
but smaller or
25
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