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Smart Energy & Power Quality SolutionsRogowski current transformer and measurement transducerROGOWSKI CURRENT TRANSFORMERAND MEASUREMENT TRANSDUCER
Smart Energy & Power Quality SolutionsRogowski current transformer and measurement transducerThe Rogowski coil principleThe Rogowski measuring principle is a special form oftransformational current measurement of sinusoidal andnon-sinusoidal alternating currents.The Rogowski coil is a patented, iron-free inductioncoil (air coil). In order to attain ideal accuracy, this aircoil should be almost completely closed. This has beenachieved through the patented connection technology. Recordharmonics and transients with phaseprecision FlexibleRogowski current transformer suitable forretrofitting Alternatingcurrents from 1-4000 A can be recordedwith just one variant Rogowskicurrent transformers with measurementtransducer can be used together with all JanitzaUMGs*The alternating current in the line that is to be measuredinduces a voltage in the Rogowski coil, which isproportional to the phase current. The Rogowski coiloperates in a pronounced linear manner, even with highor rapidly changing currents. As such, this type of sensoris particularly well suited for energy measuring systemsthat are exposed to high or rapidly changing currents.Furthermore, the Rogowski coil offers the advantages ofcompact size and simple installation. Speedbecause load changes are immediatelydetected and so drop-outs and process interruptionscan be prevented Simpleoperation also with large cable diameters –space-saving, compact and handy Highsystem availability through simple installationwithout removing system parts Sitssecurely on power rails and round conductorsthanks to professional fastening Installand operate safely* Not in combination with the UMG 20CMThe Rogowski coil is a helical wire coil.It can be guided easily around a conductor.2Comparison of current transformer accuracy between a conventionalRogowski current transformer and the patented Janitza solution withconsideration to the installation position
Smart Energy & Power Quality SolutionsRogowski current transformer and measurement transducerRogowski coil – thinner, lighter flex converterfor simple installationThe Rogowski coil is used for current measurement ofAC currents and is primarily employed for retrospectiveinstallation in existing systems - optionally on power railsor power cables. Frequency bandwidth of the Rogowski coil 50/60 Hz,up to 700 kHz without load (no-load operation) Accuracy per class 0.5, in accordance with IEC 61869 Operating temperature: -40 C to 80 C Rated insulation voltage 1 kV CAT III Rogowski coil from 10 to 10000 ARMS – in combinationwith Janitza measurement transducer RogoTrans upto 4000 ARMS Accuracy better than 0.65 % irrespective of theposition of the primary conductor Sealing possibleRetrospective installation around the primary conductoris possible, because the Rogowski coil can be separated.The output signal from the Rogowski coil is fed toa measurement transducer, which issues standardised ACcurrent of max. 1 A at the output. CE-certified (2014/30/EU), in accordance withthe European Directive 2014/35/EU and tested inaccordance with the standard IEC 61010-1 Unique, IP67, flexible and precise AC currenttransformer with separating core, based on Rogowskicoil technology Retrospective clip-on system without disconnectingthe phase conductor Device for fixing to the primary conductor with a cable tie Internal screening High linearity, no saturation, no current upper limitof the Rogowski coilThe operation of the Rogowski coils as per thetechnical data mentioned herein can only beassured in combination with Janitza measuringtransducer “RogoTrans”.3
Smart Energy & Power Quality SolutionsRogowski current transformer and measurement transducerRogowski current transformer –the time-saving installationVersatile – Rogowski current transformer in applicationSimple installation evenwhere space is tightSealed and mounted on thephase conductor with a cable tie4Also easy to install with tight spatial conditions and parallel feed
Smart Energy & Power Quality SolutionsRogowski current transformer and measurement transducerThe operation of the Rogowski coils as per the technical data mentioned hereincan only be assured in combination with Janitza measuring transducer “RogoTrans”.Rogowski coil, item no.15.03.60915.03.61015.03.611Diameter70 mm175 mm300 mmLength of the connection line3m3m3mMax. output voltage30 V30 VPrimary currentUp to 10000 AUp to 10000 AUp to 10000 A*1Rated transformation ratio (@ 50 Hz)44.44 kA/V44.44 kA/V44.44 kA/VRated frequency50/60 Hz50/60 Hz50/60 HzSecondary voltage22.5 mV (at 1000 A / 50 Hz)22.5 mV (at 1000 A / 50 Hz)22.5 mV (at 1000 A / 50 Hz)Mutual inductance71.98 nH72.314 nH72.84 nHTemperature coefficient of M 30 ppm/K 30 ppm/K 30 ppm/KFrequency bandwidth (cable length 1.5 m)420 kHz350 kHz300 kHz*2Phase displacement (@ 50/60 Hz)*30.004 *30.004 *30.004 *3Coil inductance180 µH343 µH566 µHCoil resistance56 Ω105 Ω170 ΩRatio error (centred)– 0.5 to 0.5 % class 0.5Accuracy per IEC 61869-2– 0.5 to 0.5 % class 0.5Accuracy per IEC 61869-2– 0.5 to 0.5 % class 0.5Accuracy per IEC 61869-2Ratio error (all positions)*4– 0.75 to 0.75*4incl. positioning errors– 0.75 to 0.75*4incl. positioning errors– 0.75 to 0.75*4incl. positioning errorsNoneNoneNoneInfluence of external current 0.2 0.2*5 0.2*5Weight192 g206 g222 g*1*1*2Linearity error*5*2*530 V*1*2*1 In combination with Janitza measurement transducer RogoTrans up to 4000 A.*2 On request, the frequency bandwidth and phase shifting model can be made available.*3 With installation at a right angle to the phase conductor.*4 Under consideration that the Janitza Rogowski current transformer is installed perpendicular to a primary conductor of min. Ø 15 mm.*5 Under consideration that a further phase conductor of min. Ø 15 mm is installed at the same height and at a right angle to the Janitza Rogowski current transformer.see Detail 1IPDetail 1Section A-AConnectiondiP/dtIPVS VS-5
Smart Energy & Power Quality SolutionsRogowski current transformer and measurement transducerMeasurement transducerfor Rogowski current transformerThe measurement transducer “RogoTrans” for theRogowski current transformer records alternatingcurrents or rather a voltage signal and possesses astandardised output signal of 0 to 1 A.The metering range is up to 4000 A, the voltage supply is24 V DC. The measurement transducer is very compactby design and can be mounted on a DIN rail. Measurementtransducer for Rogowski currenttransformer (item no. 15.03.609, 15.03.610, 15.03.611) Standardisedoutput signal 0 to 1 A Formeasuring alternating currents Meteringrange up to 4000 A Voltagesupply 24 V DC Compactconstruction in a plastic housing Assemblyon DIN rail possibleOutput0 to 1 AS2 (I)UMGS1 (k)blackInput currenttransformerwhiteMetering rangesor fault LEDProgram buttonAlarm output6Ub 24 V
Smart Energy & Power Quality SolutionsRogowski current transformer and measurement transducerMeasurement transducer for Janitza Rogowski current transformerItem no. 15.03.613DimensionsWeightPower supply22.5 x 100 x 110 mm (W x H x D)approx. 0.2 kg24 V DC (18 to 36 V) / 1 A 300 mA (with 1 A output current) 80 mA (without output current)Current drawJanitza Rogowski coilmax. 90 mV (4000 A range)Input1 to 4000 A1 to 2000 A1 to 1000 A1 to 500 A1 to 250 ACurrent metering rangesMetering range setting (button)LED (yellow)Wear-free metering range selection via micro-controller and PGAOperating and metering range displayvia 6 LED (green)Phase angle 1 Linearity error at 50 HzMeasuring error at 50 Hz 0.2% in all metering ranges 0.2% in all metering rangesInput impedance10 k Ω in all metering rangesSignal output0 to 1 AMeasurement range exceeding110%Burden0 to 1.5 OhmLinearity error burden 0 to 1.5 Ohm 0.02%24 V DC / 200 mA(floating potential optical output, open with fault)Alarm outputOverload (range exceeding)Burden too great (output circuit)Undervoltage (24 V)Alarm messages (via red LED)Alarm delay60 secondsProtection typeIP30Ambient temperature–20 C to 70 CInstallation positionVertical; if multiple devices are used next to each other thena minimum distance of 5 mm must be maintained between thedevices (heat development)Storage temperature–25 C to 85 CExample connection of Rogowski current transformer with measurement transducer on UMG 96RML1L2L3Max. line length up to 20 m witha line cross section of 2.5 mm27
Smart Energy & Power Quality SolutionsJanitza electronics GmbHVor dem Polstück 6 35633 LahnauGermanyPhone: 49 6441 9642-0info@janitza.de www.janitza.comSales partnerItem no.: 33.03.768 Doc. no.: 2.500.137.3 Version 10/2019 Subject to technical alterations.The current version of the brochure is available at www.janitza.com
Rogowski current transformers with measurement . Rogowski coil – thinner, lighter flex converter for simple installation The Rogowski coil is used for current measurement of . Unique, IP67, flexible and precise AC current transformer wit
