Danfoss vlt FC 102 Operating Instructions Manual

Also see for VLT HVAC Drive FC 102: Operating instructions Service guide Programming guide Installation guide Installation guide

4.1.8. Mains connection for B4, C1 and C2130BA714.10Illustration 4.11: How to connect to mains and earthing for B4.Illustration 4.12: How to connect to mains and earthing for C1and C2.4.1.9. Mains connection for C3 and C4130BA718.10Illustration 4.13: How to connect C3 to mains and earthing.130BA719.10Illustration 4.14: How to connect C4 to mains and earthing.4.1.10. How to connect motor - forewordSee sectionGeneral Specifications for correct dimensioning of motor cable cross-section and length.• Use a screened/armoured motor cable to comply with EMC emission specifications (or install the cable in metal conduit).• Keep the motor cable as short as possible to reduce the noise level and leakage currents.• Connect the motor cable screen/armour to both the decoupling plate of the frequency converter and to the metal of the motor. (Same appliesto both ends of metal conduit if used instead of screen.)• Make the screen connections with the largest possible surface area (cable clamp or by using an EMC cable gland). This is done by using thesupplied installation devices in the frequency converter.• Avoid terminating the screen by twisting the ends (pigtails), as this will spoil high frequency screening effects.• If it is necessary to break the continuity of the screen to install a motor isolator or motor relay, the continuity must be maintained with the lowestpossible HF impedance.Cable length and cross-sectionThe frequency converter has been tested with a given length of cable and a given cross-section of that cable. If the cross-section is increased, the cablecapacitance - and thus the leakage current - may increase, and the cable length must be reduced correspondingly.VLT® HVAC Drive Operating Instructions 4. Electrical installationMG.11.A6.02 - VLT® is a registered Danfoss trademark 294