SIMOVERT MASTERDRIVES Vector Control - Industry

SIMOVERT MASTERDRIVES Vector Control6SE71 ConverterCabinet UnitsCabinet unitsLine filters, line commutating reactors and protective devicesL00 RadiointerferencesuppressionfilterRadio-interference suppressionfilters to EN 55 011Class A1 (for industrial applications)are available for thecabinet units in the powerrange 37 kW to 1500 kW.In order to enable connectionof the shield for the radio-interferencesuppression filter,an EMC shield bus (codeM70) is integrated at theconverter output.Description of the optionsThe radio-interference suppressionfilters under optionL00 can be used for earthedsystems. Radio-interferencesuppression filters for nonearthedsystems are availableon request.L20Operation fromnon-earthedsystemThe option, operation from anon-earthed system (IT systems,code L20), must beordered separately in thecase of converters for singlequadrantoperation, 6-pulse,in the power range from45 kW to 315 kW/380 V to 480 V;37 kW to 315 kW/500Vto600V;55 kW to 400 kW/660 V to 690 V.This option is standard in thecase of all other cabinetunits.L21Overvoltageprotection boardL22, LineL23, commutatingL89 reactorIn the case of converterswith single-quadrant operation,a line commutatingreactor with a relative impedancevoltage of2%isbuilt in and, in the case ofconverters for four-quadrantoperation, with a relativeimpedance voltage of 4 %.Operation without a linecommutating reactor (codeL22) for single-quadrant andThe overvoltage protectionboard protects the semiconductorsof the supply-sideconverter against overvoltages,such as can occurwhen the converter transformeris tripped on theprimary side of the system.The 7YY30 overvoltage protectionboards are equippedwith varistors and protectivethyristors. If an excessivelyfour-quadrant operation isonly permissible if the relativeimpedance voltage ofthe supply system is greaterthan 6 %. In the case of12-pulse supply, at least oneline commutating reactorwith2%relative impedancevoltage is necessary persystem or a convertertransformer in the form of athree-winding transformerhigh overvoltage occurs inthe input circuit, an appropriatesignal is generated at theterminal.must be used (seeEngineering InformationSection 6). The differencebetween the two outputvoltages should be less than0.5 %.In the case of converterswith self-commutated,pulsed rectifier/regenerativeunits, the line commutatingreactor is already integratedin the line filter.4L87Insulationmonitor,non-earthedsystemsThe insulation monitordetects the insulationresistance in non-earthedsystems (IT systems). In addition,it detects all insulationfaults in the DC link and onthe motor-side of the converter.If the insulationresistance falls below a minimumvalue, a signal is outputto the terminal.N.B.:The insulation monitordetects the insulationresistance of all parts of thesystem connected on thesecondary side of the convertertransformer and onlyneeds to be used once perbranch. Depending on thesupply voltage, the insulationmonitor on the branch functionsas follows: If the insulation monitor issupplied with the optionK74, the insulation monitormonitors the converter andthe preceding branch onlywhen the converter hasbeen switched on. In the case of externalsupply to the insulationmonitor with 230 V AC, theinsulation monitor onlymonitors the precedingbranch when the converterhas been switched off.If the converter has beenswitched on, it is also monitored.L88Earth-leakagemonitor,earthedsystemsThe earth-leakage monitor isdesigned as a summationcurrent transformer andmonitors the earth-fault currentof an earth fault inearthed systems (TN and TTsystems). If the earth-faultcurrent exceeds a maximumvalue, a signal is output tothe terminal.Siemens DA 65.10 · 2003/20044/39