Product Center | LF2005-S/SP11 Closed-Loop Hall-Effect Current Transducer

Accurately Master Ultra-High Current – The “Sharp Eye” Protecting Your System Core

In high-end applications such as railway traction, large industrial drives, and renewable energy grids, the ability to accurately and non-intrusively measure thousands of amperes is the lifeline of system stability.

That’s why more and more top engineers choose the LF2005-S/SP11.

As a masterpiece of closed-loop Hall-effect technology from LEM (Switzerland), the LF2005-S/SP11 is more than just a transducer – it is a guardian for your power system. It converts massive current information into ultra-low-error signals, putting you in complete control.

LF2005-S/SP11 Core Technical Highlights

Closed-Loop Hall-Effect Technology

Say goodbye to the temperature drift and hysteresis of open-loop sensors. The advanced closed-loop (compensated) Hall-effect technology provides galvanic isolation between the primary circuit and the electronic circuitry while keeping the magnetic core operating at zero flux. This delivers excellent linearity and very low temperature drift.

Wide, High-Current Measuring Range

High costperformance choice. The LF2005-S/SP11 is specifically designed for rated currents up to 2000 A (RMS), with a standard measuring range of 3700 A. Whether facing sudden current spikes or brief overloads (up to 3700 A), the transducer keeps your system safe.

High Insulation & Strong Noise Immunity

Galvanic isolation between the primary (high-voltage, high-current) circuit and the secondary electronic circuit is achieved via a current transformer, with a test voltage rating of 6 kV. This effectively protects expensive downstream control circuits from highvoltage surges. The device also offers high immunity to external interference, delivering stable, clean data even in EMCtough environments like substations or industrial plants.

Flexible, Easy Installation & Integration

The compact mechanical design features a 60.5 x 20.5 mm or 27 mm aperture, allowing easy busbar or cable feedthrough. Multiple panel mounting options are supported, along with ±15 V to ±24 V bipolar power supply to suit various industrial power environments.

Why You Must Choose the LF2005-S/SP11

1. Hard Technical Specifications

Accuracy: Overall precision of ±0.4 % – the solid foundation for your energy metering and power quality analysis.

Bandwidth: Very fast response time. Accurately follows current harmonics up to 100 kHz, easily handling modern variable frequency drives with rich harmonic content.

Wide Operating Temperature: –40 °C to +85 °C. Whether in freezing outdoor wind farms or hot industrial cabinets, the transducer maintains outstanding stability.

Large Measuring Range: Primary current measurement range up to 3700 A.

2. Swiss Quality – Safe & Reliable
Housing made of UL 94V0 flameretardant material. Core technology from LEM, Switzerland. 100% tested to international industrial standards. No insertion loss, no drift – every reading reflects toptier quality.

LF2005-S/SP11 Popular Applications

The LF2005-S/SP11 is widely used in the following demanding power electronics fields:

Railway Traction: Accurate traction converter control for electric locomotives and highspeed trains.

Industrial Drives & Servo: Vector control for AC variable frequency drives and servo motor drives.

Renewable Energy & Storage: Current measurement in PV inverters and wind power converters.

Power Supplies & UPS: Current management for uninterruptible power supplies (UPS), switchmode power supplies (SMPS), and batterypowered equipment.

Welding & Heavy Electrical Equipment.