Circutor computer SMART III-Fast Series Bedienungsanleitung PDF herunterladen (Seite 24)

Other Programs� Other programs can be used, such as 1�2�2�4, 1�2�4�8, 1�1�2�2, etc� The

meaningofthenumbers,ascanbededucedfromtheprecedingcases,givesthepowerratio

betweentherststage,whichreceivesavalueof1,andthesubsequentstages(2meanstwice

asmuchpower,4meansfourtimesasmuchpower,etc�)�

Theunitcanbeusedtocongureprogramsfrom1�1�1�1to1�9�9�9�

4�1�5� Plug and Play�

Whenareactiveenergyregulatorisinstalled,aseriesofparametersmustbeconguredfor

itscorrectoperation�Someoftheseparametersmightbedifculttodiscover,forexample,the

voltagephasesorthecorrespondencebetweenmeasuredcurrentanditsvoltage,aswellas

thecurrenttransformerratio�TheComputer SMART III FASTincludesanautomaticprocess,

whichintelligentlyworksoutnecessaryparameterssuchas:

Connection type: detectstheconnectiontypeusedfromamongthepossibleoptions:

3U�3C, 3U�1C and 2U�1C�

Phase:identiesthecorrespondencebetweenthevoltagesandthecurrentsconnect-

ed,regardlessoftheconnectiontypedetectedpreviously�

Number of stages installed and Program:sequentiallyconnectsallthestagesto

workouthowmanystagesareinstalledandcalculatestheprogram,inotherwords,the

powerratiobetweenthecapacitors�

C/K: calculatestheratiobetweenthecurrenttransformerandthepowerofthesmall-

eststep�

4�1�6 Connection time (Ton) and Reconnection time (Trec)�

TheConnection time, Ton,denestheshortestpossibletimebetweenchangesinthestatus

ofthestages,inotherwords,betweenconnectionsanddisconnections�Therefore,thecongu-

rationofthisparameterhasadirectimpactonthecompensationspeed,inotherwords,onthe

capacityformonitoringloadchanges�Settingashorterconnectiontimeimprovesthepower

factorcorrectionwhentheloadcanchangequickly�

However, a shorter Ton will lead to a higher number of connections per time unit, possibly

shorteningtheusefullifeoftheassociatedcomponents(thyristors,capacitors)�Toassessthe

numberofconnections,theComputer Smart III FASTusesindividualenergymetersforeach

stage�

TheReconnection time, Trec,istheshortestpossibletimebetweendisconnectingastage

andreconnectingit�Thistimeisnecessaryforthecapacitortodischargeenoughsothat,when

itisreconnected,itdoesnotcauseovercurrentsinthesystem�

BothTonandTrechavedifferenttimebasesfortheComputer SMART III (inseconds)andfor

the Computer SMART III FAST (innetworkcycles)�

4�1�7 THD and harmonics

Non-linearloads,suchasthoseinrectiers,inverters,variablespeeddrivers,furnaces,etc�,

absorbnon-sinusoidalperiodiccurrentsfromthemains�Thesecurrentsaremadeupofafun-

damentalcomponentwithafrequencyof50or60Hz,plusaseriesofoverlappingcurrentswith

frequenciesthataremultiplesofthefundamentalfrequency;thesearedenedasharmonics�

Theresultisadeformationofthecurrentand,thus,ofthevoltage,whichleadstoaseriesof

Computer SMART III FAST

Instruction Manual

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Circutor computer SMART III-Fast Series Bedienungsanleitung Seite 24

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