SIMOVERT MASTERDRIVES Vector Control - Industry

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SIMOVERT MASTERDRIVES Vector ControlEngineering InformationElectromagnetic compatibility (EMC)Compact and chassis unitsCabinet unitsEMC stands for electromagneticcompatibility and,according to the definitionof the EMC directive, describesthe “ability of a deviceto function satisfactorilyin an electromagnetic environmentwithout itself causingelectromagnetic interferencewhich is unacceptablefor other devices in this environment.”Inorder to ensurethat the relevant EMC standardsare complied with, thedevices must demonstratea sufficiently high immunity,on the one hand, and interferenceemission must belimited to compatible values,on the other.The product standard,EN 61 800-3, relevant to“variable-speed drives”describes the requirementsfor residential and industrialsectors.Type of interferenceElectrostatic dischargeImmunityThe units satisfy the requirementsof the EMC productstandard, EN 61 800-3, forthe industrial sector and thusthe lower values regardingimmunity required by theresidential sector as well.Interference emission andradio interferencesuppressionIf converters are used in aresidential area, conductedinterference or electromagneticallyemitted interferencemust not exceed thelimit values according to“B1”.Level ofinterferenceup to 12 kVCommentsRapid transient interference (burst) up to 4 kV for power sectionup to 2 kVfor signal cablesA residential area in thissense is a connection, i.e.an outgoing section of atransformer, to which privatehouseholds are also connected.The EMC directive requiresthat an industrial system as awhole is electromagneticallycompatible with its environment.In order to limit the interferenceemission, the followingmeasures must be provided: Radio-interference suppressionfilters, includingline commutating reactorsfor reducing the conductedinterference Shielded cables for motorsupply cables and signalcables for reducing electromagneticallyemitted interference Compliance with the installationguidelines.In systems with MASTER-DRIVES units and other components,e.g. contactors,switches, monitoring units,automation units etc., itmust be ensured that nointerference is emitted tothe outside and also that theindividual units do not causeany interference amongthemselves. In this respect,the measures described inthe Compendium, Section 3,“Design of Drives inConformance with EMCguidelines” are to be implemented(Compendium OrderNo., see Section 5 “Documentationand Training”).The most important of thesemeasures are as follows: The components of a systemmust be housed in acabinet which acts like aFaraday cage. Signal cables and motorsupply cables must beshielded. The shields mustbe connected to earth atboth ends. Signal cables should bespatially separated (atleast 20 cm) from thepower cables. If necessary,screening plates are to beprovided.For further measures anddetails, see the installationguidelines referred to.66/46Siemens DA 65.10 · 2003/2004
Compact and chassis unitsCabinet unitsSIMOVERT MASTERDRIVES Vector ControlEngineering InformationSystem componentsSupply-side componentsLine fusesThe 3NE1 SITOR fuse providesboth cable protectionand semiconductor protectionin one fuse. This resultsin significant cost savingsand reduced installationtimes.For Order No. and assignment,see Section 3.For the description andtechnical data of the fuses,see Configuration Manual“SITOR Halbleiterschutz-Sicherungen”, Order No.:E20001–A700–P302 (availableonly in German).Line commutating reactorThe line commutating reactorreduces the harmonicsof the converter, the rectifierunit and the rectifier/regenerativeunit. The effect of thereactor depends on the ratioof the line short-circuit outputto the drive output.Recommended ratio of lineshort-circuit output to driveoutput > 33 : 1: Usea2%line commutatingreactor for convertersand rectifier units. Usea4%line commutatingreactor for rectifier/regenerative units.A line commutating reactoralso limits current spikescaused by line-supply voltagedisturbances (e.g. dueto compensation equipmentor earth faults) or switchingoperations on the powersystem.Reactors for supply voltagesof 380 V to 480 V and 50 Hzcan be used with 60 Hz withoutany restrictions. In thecase of supply voltages of500 V and 690 V, the permissibleoperating current with60 Hz must be reduced to90 % of the specified valueand it may be necessary touse a reactor with the nexthigher current rating (seeSelection and ordering data,Section 3).For rated currents up to 40 A,connecting terminals arefitted. In the case of reactorswith rated currents 41 A,flat connections are provided.The conductor cross-sectionswhich can be connected areindicated in the dimensiondrawings (see Section 7).The commutating reactorsare designed with degree ofprotection IP00.For further technical dataregarding the mechanicaldesign, see Catalog PD 30,Order No.:E86060–K2803–A101–A1(only available in German).Autotransformers forrectifier/regenerativeunitsRectifier/regenerative unitsrequire a 20 % higher supplyvoltage at the anti-parallelinverter bridge for regenerativeoperation. An autotransformercan be used to adaptthe voltage accordingly.Two types of autotransformerare available, onewith 25 % and another with100 % power-on duration.They correspond to therequired technical specificationsand cannot be replacedby any other types.For Order No. and assignment,see Section 3;for dimension drawings,see Section 7.Radio-interferencesuppression filtersWhen integrated in theinstallation in accordancewith EMC guidelines,SIMOVERT MASTERDRIVESapplications comply with theEMC product standard forelectrical drives, EN 61800-3.The radio-interferencesuppression filters, inconjunction with the linecommutating reactor, reducethe interference voltages ofthe converters, the rectifierunits and the rectifier/regenerativeunits – up to an outputof 37 kW . The specifiedlimits acc. to EN 55 011 ClassB1 (residential sector) for3-ph. 200 V AC to 230 V ACand 3-ph. 380 V to 480 V ACare adhered to with the suggestedfilters (TN systems).Radio-interference suppressionfilters with ratedcurrents up to 2500 A andrated voltages of up to 690 Vare available for the differenttypes of power systems inthe industrial sector.For Order No. and assignment,see Section 3;for dimension drawings,see Section 7.For limit values, see “Electromagneticcompatibility(EMC)”on page 6/46.NoteIf several converters are builtinto a drive cabinet or controlroom, a common sharedfilter with the total currentof the installed convertersis recommended in order toavoid exceeding the limitvalues. The individual convertersare to be decoupledwith the corresponding linecommutation reactor.6Siemens DA 65.10 · 2003/20046/47
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