Electrical installation, control cablesControl cables must be screened/armoured. Thescreen must be connected to the frequency converterchassis by means of a clamp. Normally, the screenmust also be connected to the chassis of the control-ling unit (use the instructions for the unit in question).In connection with very long control cables and ana-logue signals, in rare cases depending on the instal-lation, 50/60 Hz earth loops may occur because ofnoise transmitted from mains supply cables. In thisconnection, it may be necessary to break the screenand possibly insert a 100 nF capacitor between thescreen and the chassis.MG.27.E2.02 - VLT is a registered Danfoss trademark 53Installation
