VLT
®
2800 Series
■ Electrical installation, control cables Control cables must be screened/armoured. The
screen must be c onnected to the frequency converter
chassis by means of a clamp. Norma lly, the screen
must also be connected to the chassis of the
controlling unit (use the instruct ions for the unit in
question). In connect ion w ith very long control cables
and analogue signals, in rare cases depending on
the installation, 50/60 Hz earth loops may occur
because of noise transmitted from mains supply
cables. In this connection, it may be necessary
to break the s creen and possibly insert a 100 nF
capacitor between the screen and the chassis.
MG.28.E9.02 - VLT is a registered Danfoss trademark
54
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