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大电流电抗器测试仪DPG 10-1000B
大电流电抗器测试仪DPG 10-1000B

主要应用于电力系统、风力发电、太阳能、光伏、充电桩领域的电抗器需要施加大电流测试场合



Description&TechnicalSpecifications

 

 

 

 

 

 


Allrightsreserved.Thisdocumentmaynotbereproducedinanyformorbealteredusinganyelectronic, mechanical or chemical processes, without the express writtenconsent of the owners.We reservethe right to change any technical information contained in this documentwithout prior warning.All technicalinformation serves only as an extension of the product description and is notlegallybinding.

Issue05/17


ProductDescription

Properties

 

The3-PhaseExtensionUnitisanadditionalunitfortheDPG10PowerChokeTesterseries.Withthehelpofthe3-PhaseExtensionUnitthe inductanceof3-phasechokescanbemeasuredsimplyandquickly.

 

 

Fig.1:InductancecurvesL1(i),L2(i)andL3(i)forthethreecoilsofa3-phasechoke

 

 

Allthreecoilsofthechokeareautomaticallymeasuredinsuccessionwithoutchangingtheconnections of thetest specimen. The softwaretakes into account the changedfluxconditionsinthecorecomparedtoa3-phasesinusoidalcurrentfeedandcorrectsthemeasurementresultsaccordinglyusingasophisticatedalgorithm.

 

Inrelationtothemeasurementwith50Hzmainsvoltage,thismethodismuchsimpler,verymuchfasterandalsomoreaccurate.

 

Thanks to the pulse measurement method of the DPG10 the measurement takes only10to20secondsandsuppliesacompleteinductancecurveL(I),whosecurrentaxisisscaledwith RMS values. The inductance of the three legs is illustratedin separate curvesL1(i),L2(i) andL3(i).

 

The measurement result is equivalent to a conventionalmeasurement with3-phasesinusoidal voltages and currents. A correctionto a reference frequency of 50 Hzor 60Hzcan be carriedout.

 



Areasofapplicationandmeasurementlimits

 

TheDPG10seriesissuitableincombinationwiththe3-PhaseExtensionUnitforthedevelopment,productionanduseof3-phasepowerinductorsandtransformersofallkinds,e.g.

 

*       mainschokes

*        filterchokes for UPS, inverters,etc.

*       commutationinductors

*        andmuchmore

 

Forthecorrectdeterminationofinductance,thefollowingconditionsmustbemetforthe3-phasetestspecimen,whichisusuallythecaseanyway:

 

*       allthreelegshavethesamecorecross-section

*       coremadeofelectricalsheetsheetoranyoftheothercorematerialsmentionedinthe chapter“Frequencycorrection”

 

The maximum current up to which the 3-phase inductancemeasurement

 can takeplace dependsonthebasicunitemployed.WithaDPG10-4000B/Ftheinductancecurvecanbedetermined

 up to about 2350 Arms. At larger inductance values this current 

reduces duetothemaximumavailablepulseenergy(e.g.DPG10-4000B/Fupto6000J).




 


 

Fig. 2: Maximummeasurable RMS currentversus the inductance of a 3~choke

 

 

Connection to the DPG10 basicunit

 

The 3-Phase Extension Unit must be placed directly on top of the DPG10 basic unit.TheDPG10 basic unit and the 3-Phase Extension Unit are connected to each other bythreecables,whichareincludedinthescopeofdelivery.

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