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CTSR Series | Non-Contact Milliamps Measurement | LEM

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CTSR Series | Non-Contact Milliamps Measurement | LEM Skip to main content EN JP CN EN JP CN Check Stock Career Investors Contact Products Applications Support About Lem Search Current Sensors 45-90 A 90-180 A 187.5-375 A 375-750 A 750-1500 A 1500-3000 A 3000-6000 A 6000-12000 A 12000-24000 A Other value All Current Sensors Voltage Sensors 25-50 V 50-100 V 100-200 V 200-400 V 400-800 V 800-1600 V 1600-3200 V 3200-6400 V All Voltage Sensors Integrated Current Sensors GO Series HMSR Series GXS Series GXN Series GXM Series All Integrated Current Sensors Rogowski Coil ART Series ARU Series ARH Series INTEGRATORS FOR ROGOWSKI COILS Energy Meters DCES DCBM 400 & 600 DCBM 100 TEMA4G EM4T II All Energy Meters Automotive Battery Management EV Chargers Automotive Motor Control Smart Grid Welding Automation Drives High Precision Power Supplies Renewable Energies Trackside Traction After Sales & RMA Merchandize authorization RMA Categories All after sales and RMA Downloads Application Notes Brochures Certificates All Downloads Technical FAQs General All Technical FAQs Company Information History Board of Directors & Committees Organization Values Compliance Sustainability Our locations All Company Information Quality & Environment Quality Environment All Quality & Environment Our partners Become a LEM Supplier Our general terms & conditions Our distributors News & Events All News & Events What do you need ? Product information Check Stock Global information GO EN JP CN EN JP CN Products Current Sensors Voltage Sensors Integrated Current Sensors Rogowski Coil Energy Meters Applications Automotive Battery Management EV Chargers Automotive Motor Control Smart Grid Welding Automation Drives High Precision Power Supplies Renewable Energies Trackside Traction Support After sales and RMA Downloads Technical FAQs About Lem Company Information Quality & Environment Suppliers News & Events Check Stock Career Investors Contact What do you need ? Product information Check Stock Global information GO Home lem_current_page : CTSR Series CTSR Series Non-contact and accurate milliamps measurement single supplied (+5V).

Order now Distributor List Contact Sales CTSR - Current sensors The CTSR current sensors enable the measurement of DC, AC, and pulsed currents ranging from 0.3 to 1 ARMS nominal, featuring galvanic separation between the primary and secondary circuits. 

These transducers are designed for non-contact, compact, and accurate milliamps measurement, specifically for residual or leakage current measurement. With low offset drift, they are intended for PCB mounting. 

CTSR models have an additional pin at the output for more flexibility in applications. This pin provides access to the internal voltage reference which can then be fed to the reference of an A/D converter (Analog Digital). This extra pin can also receive the internal reference (from 2.3 to 4 V) of the DSP (Digital Signal Processor) or A/D converters commonly used in Power Electronics, allowing cancellation of the reference temperature drift.

The CTSR current sensors utilize closed-loop Fluxgate CTSR type technology, ensuring high accuracy, particularly in industrial applications.

CTSR – Features and benefits FeaturesClosed loop (compensated) Fluxgate current transducerVoltage outputSingle supply voltageNon-contact measurement with high aperture (Ø 20.1 mm)PCB mountingAdditionally, the CTSR-TP series includes primary inserted conductors, providing added flexibility and functionality to the sensor series.

BenefitsHigh accuracyVery low offset drift over temperatureHigh overload capabilityHigh creepage and clearance distances (11 mm) for high insulationReference pin with two modes, Ref In and Ref OutDegauss and test functionsCompact unique design for all the modelsTypical applicationsThe CTSR sensor series is well-suited for various high-accuracy demanding applications in the industry, including:

Residual current measurementLeakage current measurement in transformerless photovoltaic invertersFirst human contact protection of PV arraysFailure detection in power sourcesSymmetrical fault detection (e.g. after motor inverter)Leakage current detection in stacked DC sourcesSingle phase or three phase nominal current measurement up to ±30 A per wire (DC or AC) CTSR transducers standard compliance EN 50178 for industrial applications UL 508 (UR marking)European Directive EMC 2004 / 108 / EEC: CE markingUsing UL94-VO recognized materialsLow voltage directive 2006 / 95 / EECSafety IEC 61010-1Suitable to fulfil VDE 0126-1-1 and UL 1741 LEM CTSR – Download & Technical Characteristic Product

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DocumentPrimary nominal RMS currentSupply Voltage rangeOp. TemperatureCTSR 0.3-PDatasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-P/SP3 Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-P/SP5 Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-P/SP10Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-TP/SP14Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-TP/SP15 Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-TP/SP17 Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-TP/SP21 Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-TP/SP22 Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.3-TP/SP4Datasheet
3D0.3 A5 to 5-40 to 105 °CCTSR 0.6-PDatasheet
3D0.6 A5 to 5-40 to 105 °CCTSR 0.6-P/SP10Datasheet
3D0.6 A5 to 5-40 to 105 °CCTSR 0.6-TP/SP16 Datasheet
3D0.6 A5 to 5-40 to 105 °CCTSR 0.6-TP/SP18 Datasheet
3D0.6 A5 to 5-40 to 105 °CCTSR 0.6-TP/SP2Datasheet
3D0.6 A5 to 5-40 to 105 °CCTSR 1-PDatasheet
3D1 A5 to 5-40 to 105 °CCTSR 1-P/SP10 Datasheet
3D1 A5 to 5-40 to 105 °CCTSR 1-TP/SP15 Datasheet
3D1 A5 to 5-40 to 105 °CCTSR 1-TP/SP18Datasheet
3D1 A5 to 5-40 to 105 °CCTSR 1-TP/SP19 Datasheet
3D1 A5 to 5-40 to 105 °CCTSR 1.5-TP/SP18 Datasheet
3D1.5 A5 to 5-40 to 105 °CCTSR 2-TP/SP19 Datasheet
3D2 A5 to 5-40 to 105 °CCTSR 3-TP/SP20 Datasheet
3D3 A5 to 5-40 to 105 °CCTSR 3-TP/SP23 Datasheet
3D3 A5 to 5-40 to 105 °CCTSR 3-TP/SP24 Datasheet
3D3 A5 to 5-40 to 105 °CCTSR 3-TP/SP26 Datasheet
3D3 A5 to 5-40 to 105 °CCTSR 3-TP/SP27 Datasheet
3D3 A5 to 5-40 to 105 °CCTSR 3-TP/SP28 Datasheet
3D3 A5 to 5-40 to 105 °CCTSR 5-P/SP3 Datasheet
3D5 A5 to 5-40 to 105 °C CTSR Sensors – ASK FOR SAMPLES / QUOTATIONS Looking to receive samples or a quotation? Please click on the contact button below and provide us with the information you need on this product series. Our sales team will get back to you shortly.

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