LEM LF 505-S/SP6 Hall Effect Current Sensor | AC/DC Current Transducer | Industrial Current Measurement Module

📘 Technical Description

The component shown is a LEM LF series current transducer, model LF 505-S/SP6, designed for galvanically isolated measurement of AC and DC currents in industrial applications, power electronics, and photovoltaic inverters.

This sensor uses closed-loop Hall Effect technology (compensated current transducer), ensuring high measurement accuracy, fast response time, and excellent immunity to electrical noise and interference.

The central aperture allows the passage of a power conductor or busbar, while the sensor converts the primary current into a proportional secondary signal suitable for use in:

• Photovoltaic inverters
• PLC systems
• Motor drives
• UPS systems
• Power converters
• Energy monitoring systems

⚙️ Main Features

✔ Hall Effect current sensor
✔ Closed-loop compensated technology
✔ AC/DC current measurement
✔ Galvanic isolation between power and control circuits
✔ High industrial reliability
✔ Fast response time
✔ Low thermal drift
✔ Rugged industrial construction

🔧 Technical Specifications

• Brand: LEM
• Model: LF 505-S/SP6
• Type: Current sensor / current transducer
• Technology: Closed-loop Hall Effect
• Measurement Type: AC/DC current
• Mounting: Panel / screw mounting
• Connection: Pin terminals
• Galvanic Isolation: Yes
• Application: Power electronics and industrial inverters
• Series: Professional industrial LF series
• Current Direction: Indicated on sensor body

⚡ Function of the Device

The sensor is used for:

• AC and DC current monitoring
• Inverter protection systems
• Motor control feedback
• Energy management systems
• Regulation and control loops
• High-power industrial applications

It is commonly installed in:

• ABB / Power-One inverters
• Industrial inverters
• UPS systems
• Motor drives
• Welding equipment
• Static converters
• Photovoltaic systems

🌐 Compatibility & Applications

Compatible with numerous industrial and power electronic systems requiring:

• Bidirectional current measurement
• Galvanic isolation
• High-reliability current monitoring

Ideal as a replacement spare part for photovoltaic inverters and industrial electronic equipment.

💡 Advantages

✔ High measurement precision
✔ Safe electrical isolation
✔ Excellent EMC immunity
✔ Reliable industrial-grade performance
✔ Compact and robust design
✔ Suitable for continuous-duty applications
✔ Long operational lifespan

🟢 Summary

The LEM LF 505-S/SP6 is a professional Hall Effect AC/DC current transducer designed for industrial power electronics and photovoltaic inverter systems.

Thanks to its closed-loop compensated technology, galvanic isolation, and high reliability, it provides accurate and stable current measurement for industrial automation, energy conversion, and photovoltaic monitoring applications.