SIMOVERT MV Medium-Voltage Drives 660 kVA to 9100 ... - Industry

SIMOVERT MVEngineering informationSystem componentsOutput cablesWhen SIMOVERT MV driveconverters are operated withoutan output filter, then highervoltages occur at the motorterminals and therefore at thecable. These are caused by theswitching edges. The motorfeeder cables must be shieldedas standard. As standard themotor supply cables have to be3-core and shielded. The use ofsingle-core cables (even shielded)is not recommended forEMC reasons. More than 3 parallelcables should not be used.The cable insulation is subjectto a higher thermal stressingthan for sinusoidal voltages dueto the squarewave voltagewaveforms. The cables describedhere fulfill theserequirements.The three-core medium-voltagemotor connecting cables3GSEGCH....FC,3GSEGCY…FC and3GSEH....FC are admirablysuited for AC drives, directly fedfrom SIMOVERT MV. They havemulti-core, bare copper conductorsin accordance withIEC 60228 Class 2 and an innersemiconductive extruded layer.The high quality core insulationusing a special Ethylene-Propylenerubber (EPR) correspondingto IEC 60092-351 hasexcellent electrical and thermalproperties. The external extrudedsemiconductive layer isaccording to IEC 60092-354.It can be easily removed fromthe insulating sheath withoutleaving any residual material(easy strip feature).The core screen above it consistsof two layers of coppertape. The cores are twisted; adjacentcore screens are electricallyconnected to one anotherover the complete cable length.The common core layerconsists of a halogene-freepolyolefine compound.For the 3GSEH.....FC type, anexternal sheath is providedabove this (refer to Fig. 6/16).The armoured (over all braiding)versions 3GSEGCH....FC and3GSEGCY…FC have spunbare copper wires over thecomplete core layer. This alsohas a helically applied coppertape which is covered by theisolating layer. We recommendthese versions in order to fulfillthe relevant EMC requirementsand to avoid disturbances withadjacent electrical equipment.The red outer sheath of thehalogen-free 3GSEGCH and3GSEH types consists of a halogene-freeolefine-copolymer(SHF1) according toIEC 60092-359, for 3GSEGCYfrom a PVC mixture (ST2).One of the most importantfeatures is the ease with whichthe insulation and the outersheath are removed for all cabledimensions.We recommend end connectionsfor connecting the cable.The high-frequency capacitiveleakage currents of the cablecan be easily discharged toground using these end caps.UseThe output cables with theOrder No. 5BG3 80 and5BG3 81 are suitable for permanentrouting in all rooms andoutdoors.Output cables with the OrderNo. 5BG3 82 are suitable forpermanent routing under theground.Note: For marine duty, themanufacturer should be directlycontacted for suitable specialcables.Cross-section: 3GSEGCH and 3GSEGCYCross-section: 3GSEH6outer SHF1 sheath or PVC sheathshared shieldconductorinner conductive layershared core coveringcore shieldouter conductive layerEPR isolating sheathouter SHF1 sheathconductorinner conductive layershared core coveringcore shieldouter conductive layerEPR isolating sheathFig. 6/16Structure of the medium-voltage motor connection cables 3GSEGCH, 3GSEGCY and 3GSEH6/20 Siemens DA 63 · 2004