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ARH Series: Flexible Rogowski Coils for AC Current Sensing

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ARH Series: Flexible Rogowski Coils for AC Current Sensing 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 : ARH Series ARH Series Unique, IP57, flexible split-core AC current sensor implementing high temperature resistance

Distributor List Contact Sales High temperature resistant Rogowski coil for electronic measurement The ARH series is a flexible clip-around Rogowski coil designed for electronic measurement of AC current, providing galvanic separation between the primary (power) and secondary (measurement) circuits. 

Its patented Perfect Loop Technology reduces measurement errors related to conductor position within the aperture and the influence of nearby external conductors. 

With an operating temperature range up to 105 °C (and up to 125 °C in direct contact), the ARH series is the ideal solution for current measurement in low voltage energy distribution boards in warm environments, or with the coils directly in contact with the busbars.

The Rogowski coil technology in this product series is intended for both industrial and smart grid applications.

ARH – Features and benefits FeaturesExtended temperature range: up to 105 °C operating temperature and 125 °C in direct contact with busbarClass 0.5 (IEC 61869-10)Very low positioning errorUL and IEC 61010UL 2808Very thin primary sensor (8 mm)Small external fields influence22.5 mV/kA sensitivity to have a very thin coil.Excellent solution for indoor applicationElectrostatic shield included for better common mode rejection of the integratorProtection degree IP57⌀ 70 mm minimum sensing aperture1 m output cable length (further lengths upon request)BenefitsCan be installed in contact with the busbar without additional accessoriesFast and easy installation with no need to dismount the busbarsHigh accuracyExcellent immunity to electromagnetic interferences. Typical applications of ARH Rogowski coils The ARH sensor series can be used in a wide range of applications in the smart grid, including:

Retrofit of low voltage switchgear for power monitoringEnergy efficiency, consumption analysis & cost allocation, switchgear monitoringPower quality of energy distribution systemsCommercial and industrial buildingsUtility low voltage distribution substations.Besides smart grid applications, the ARH product series can also be used in other areas:

Protection Systems: Detect fault currents and overcurrent conditions; Used in differential protection and ground fault detection.High Current Measurement: Ideal for measuring thousands of amps in busbars, generators, and transformers; Common in steel plants, data centers, and substations.Renewable Energy Systems: Monitor inverter output in solar and wind installations; Track AC current in grid-tied systems.Electric Vehicle (EV) Charging Stations: Measure current flow for DSO side; Support dynamic load management. ARH Rogowski Coils – Standards Compliance ARH SeriesIEC 61010-1:2010/AMD1: 2016IEC 61010-2-032: 2012IEC 61869-10: 2017UL 61010-1: 2016UL 61010-2-032: 2012UL 2808 LEM ARH – Download & Technical Characteristic ProductNominal valueOp. TemperatureOutput VoltageApertureOutput Cable LengthARH-B22-D701000 A-40 to 105 °C22,5 mV/kA70 mm1 m ARH 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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