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LEM LF1005-SSP16
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LG LM201
LG LM201

LEM LF1005-SSP16

Product Name​
LEM LF 1005-S/SP16 closed-loop Hall-effect current transducer.
Product Introduction​
LF1005-S/SP16 is a high-current closed-loop transducer for AC, DC and pulsed current measurement. It provides galvanic isolation between the primary conductor and the measuring circuit and outputs a voltage signal proportional to primary current for power converters, drives and protection systems.
Category:
Description
Technical Specifications​
Nominal primary current 1005 A RMS. Measurement range 0 to ±1500 A peak. Conversion principle closed-loop Hall/compensated Hall. SP16 voltage output ±4 V on the named variant. Accuracy at nominal and 25 °C ≤ ±0.5%. Linearity error < 0.1%. Offset referred to primary ≤ ±0.3 mA. Bandwidth -3 dB DC to 100 kHz. Response time ≤ 1 µs. Supply voltage ±15 V DC ±5%. Secondary consumption ≤ 55 mA. Isolation voltage RMS 50 Hz, 1 minute, 3 kV. Operating temperature -40 °C to +85 °C. Storage temperature -50 °C to +90 °C. Protection class IP20 for PCB/panel mounted versions. Conductor aperture sized for busbar or cable pass-through in LF form factor.
Function Features​
Galvanic isolation, wide AC/DC/pulsed bandwidth, fast response for short-circuit detection, low offset, high linearity, immunity to external magnetic disturbance through compensated loop, voltage output for direct ADC/controller interface.
Structure Characteristics​
Magnetic core with air-gap Hall sensor, compensation winding, signal-conditioning PCB, insulated primary pass-through aperture, molded housing, secondary connector/terminal interface, panel/PCB mounting features.
Working Principle​
Primary current creates magnetic flux in the core. The Hall sensor detects flux error; the electronics drive a compensation current through the secondary winding to null the flux. The compensation current, converted to a voltage output, is proportional to primary current and reproduces AC, DC or pulsed waveforms.
Installation Requirements​
Mount with adequate clearance for the primary busbar/cable aperture. Use specified ±15 V supply with filtering. Route output and power cables away from high-noise switching paths where practical. Torque primary connections to system ratings and verify creepage/clearance for the operating voltage.
Usage Precautions​
Do not exceed 1005 A continuous or ±1500 A peak without thermal derating review. Respect ±15 V supply tolerance and 3 kV isolation rating. Avoid mechanical stress on the primary aperture. Calibrate offset during commissioning; verify zero output with no primary current. Replace if isolation testing fails or housing is damaged.
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