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CD Series | Railway Current Monitoring Sensor | LEM

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CD Series | Railway Current Monitoring Sensor | 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 : CD Series CD Series For detection of differential current between 2 primary conductors carrying opposite currents, with galvanic isolation between the primary circuit and the secondary circuit

Order now Distributor List Contact Sales CD - Railway current monitoring and leakage current sensor The CD current sensing series is designed for monitoring and detecting leakage current on railway applications (fixed installations and onboard).

CD sensors’ high sensitivity allow for the measurement of a differential current that is only 0.1 % of the main current flowing in each primary conductor. For example, a differential current of 1 A can be measured with a main current of 1000 A, or 0.1 A with a main current of 100A. The measurement accuracy is about 5 to 10 % within the specified operating temperature range.

CD current sensors are based on the closed loop Fluxgate technology (C type).

CD – Features and benefits Main characteristicsClosed Loop current sensor using Fluxgate C TypeInsulating plastic case recognized according to UL 94-V0BenefitsVery good differential resolution (able to measure low differential currents with high main currents)Possibility to have an external adjustment by the user of the level of the differential current to be measured (a special design provides external terminals in the housing, where an adjustment resistor is connected)Special designs allow the adjustment of the time constant of the measured differential current, which is convenient when the output signal of the transducer is used as a trigger in a safety systemOptions to define several levels of differential currents to be measured (the transducer is then designed with a separate individual output for each current level)Protection against primary current overloadsTypical applicationsCD current sensors are commonly used in traction applications:

Railway security systemsRailway fixed installationsOnboard trains, trams, locomotives, metro… LEM CD – Download & Technical Characteristic Product

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DocumentPrimary nominal RMS currentSupply Voltage rangeOp. TemperatureCD 100-S/SP8Datasheet1 A15 to 15-40 to 85 °CCD 1000-S/SP6Datasheet
3D1200 A15 to 24-25 to 70 °CCD 1000-S/SP8 Datasheet1200 A48 to 48-25 to 70 °C CD 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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