Danfoss VLT AQUA Drive FC 202 Design Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

NOTICEUse mains cables of equal length ( ±10%) and the samewire size for all 3 phases on both rectifier sections.Screening of cablesAvoid installation with twisted screen ends (pigtails). Theyspoil the screening effect at higher frequencies. If it isnecessary to break the screen to install a motor isolator ormotor contactor, the screen must be continued at thelowest possible HF impedance.Connect the motor cable screen to both the de-couplingplate of the frequency converter and the metal housing ofthe motor.Make the screen connections with the largest possiblesurface area (cable clamp) using the supplied installationdevices within the frequency converter.Cable-Length and Cross-SectionKeep the motor cable as short as possible to reduce thenoise level and leakage currents.Switching FrequencyWhen frequency converters are used together with sine-wave filters to reduce the acoustic noise from a motor, setthe switching frequency according to the instruction in14-01 Switching Frequency.Term.no.96 97 98 99U V W PE1) Motor voltage 0–100% ofmains voltage.3 wires out of motorU1 V1 W1 PE1) Delta-connectedW2 U2 V2 6 wires out of motorU1 V1 W1 PE1) Star-connected U2, V2, W2U2, V2, and W2 to be intercon-nected separately.Table 5.15 Terminals1) Protective Earth ConnectionNOTICEIn motors without phase insulation paper or otherinsulation reinforcement suitable for operation withvoltage supply, fit a sine-wave filter on the output of thefrequency converter.5.4.4 Shielding against Electrical NoiseF-frame Size Units OnlyBefore mounting the mains power cable, mount the EMCmetal cover to ensure best EMC performance.NOTICEThe EMC metal cover is only included in units with anRFI filter.175ZT975.10Illustration 5.91 Mounting of EMC Shield5.4.5 External Fan Power SupplyFrame Sizes E and FIn case the frequency converter is supplied by DC or if thefan must run independently of the mains supply, anexternal power supply can be connected via the powercard.The connector located on the power card provides theconnection of line voltage for the cooling fans. The fansare connected at the factory to connect to a common ACline. Use jumpers between terminals 100-102 and 101-103.If external supply is needed, the jumpers are removed andthe supply is connected to terminals 100 and 101. Use a 5A fuse for protection. In UL applications, use a LittelFuseKLK-5 or equivalent.Terminal no. Function100, 101 Auxiliary supply S, T102, 103 Internal supply S, TTable 5.16 External Power SupplyHow to Install Design GuideMG20Z202 Danfoss A/S © Rev. 06/2014 All rights reserved. 1295 5