LTC600-SF/SP6;LTC 600-SF/SP6

LTC600-SF/SP6 Closed-Loop Hall Effect Current Sensor – High-Precision Current Measurement Made Easy

LTC600-SF/SP6 Product Overview

As a global leader in electrical measurement, LEM’s LTC series closed-loop Hall effect current sensors are renowned for high accuracy, high reliability, and superior galvanic isolation. The LTC600-SF/SP6 is a standout model in this series, specifically designed for industrial applications requiring precise measurement of DC, AC, and pulsed currents over a wide dynamic range. This sensor utilizes advanced closed-loop (compensated) Hall effect technology, providing complete galvanic isolation between the primary (high-power) circuit and secondary (electronic) circuit – ensuring safe and reliable measurements.

LTC600-SF/SP6 Key Selling Points

1. Wide Measurement Range & High Performance

The LTC600-SF/SP6 has a nominal current rating of 700A, but its effective measurement range extends to an impressive 3000A! This means you can accurately measure not only the nominal 700A but also handle instantaneous overloads or pulse currents up to 3000A – eliminating the need for additional sensors or range switching. Whether during motor start-up transients or abnormal power fluctuations, the LTC600-SF/SP6 delivers consistent, reliable output.

2. Up to 0.6% Accuracy Over Full Temperature Range

In precision measurement, accuracy is paramount. The LTC600-SF/SP6 achieves an overall accuracy of ±0.6% at 25°C. More importantly, it maintains extremely low temperature drift across its entire operating temperature range (-40°C to 70°C). Whether in freezing winter workshops in the north or scorching outdoor cabinets in the south, your measurement data remains stable and trustworthy.

3. 13.4 kV Insulation Test Voltage

Safety is the lifeline of electrical measurements. The LTC600-SF/SP6 withstands a staggering 13.4 kV (RMS) / 50 Hz / 1 minute insulation test voltage between primary and secondary. This withstand voltage rating far exceeds most competing products, building an impenetrable safety barrier for high-risk power equipment such as drives and welding machines.

4. Ultra-Fast Response & No Insertion Loss

Thanks to closed-loop Hall effect technology, the LTC600-SF/SP6 offers a response time of less than 1 microsecond. For applications requiring real-time current monitoring – such as servo drives, inverters, and railway traction systems – this speed translates to faster protection actions and smoother control experience. Additionally, the sensor introduces virtually no insertion loss, causing no unwanted power attenuation in the main circuit and preserving overall system efficiency.

5. High Electromagnetic Interference (EMI) Immunity

Industrial environments are filled with strong EMI, where ordinary sensors often fail. The LTC600-SF/SP6, with its closed-loop compensation structure and fully shielded design, exhibits exceptional immunity to external magnetic and electric fields. It delivers clean, undisturbed output even in harsh EMI environments like inverters and welders.

6. 100 kHz Wide Bandwidth – DC to High-Frequency Harmonics

For applications such as variable frequency drives, switching power supplies, and PV inverters, accurate measurement of high-frequency switching currents and harmonics is critical. The LTC600-SF/SP6 provides a flat frequency response from DC to 100 kHz (-1 dB). Whether monitoring DC bus current or capturing inverter output PWM waveforms, this sensor faithfully reproduces the real signal.

LTC600-SF/SP6 Technical Specifications at a Glance

LTC600-SF/SP6 Typical Applications

With its outstanding performance and high reliability, the LTC600-SF/SP6 serves numerous key industrial sectors worldwide:

Railway Traction & Rolling Stock: EN50155 certified, designed for locomotives, subways, and track-side applications – widely used in onboard energy metering and traction converter current monitoring.

AC Drives & Servo Drives: From industrial production line inverters to precision CNC machine tool servo drives, this sensor provides real-time accurate current feedback for precise closed-loop control.

DC Motor Drives: For applications requiring high torque control accuracy (e.g., elevators, forklifts, cranes), the LTC600-SF/SP6 accurately measures armature current, supporting dynamic-static conversion.

Wind & Solar Inverters: In renewable energy, widely used in wind turbine inverters and PV solar inverters to enable efficient power conversion and grid-tie control.

Power Supplies & UPS: Whether SMPS or industrial-grade UPS, the LTC600-SF/SP6 provides precise input/output current monitoring to protect critical loads.

Battery Monitoring & Energy Storage: In battery formation, storage cabinets, and EV charging stations, it accurately monitors charge/discharge currents, ensuring safe and efficient battery operation.

Why Choose LTC600-SF/SP6?

Compared to common current sensors on the market, the LTC600-SF/SP6 offers significant advantages: Closed-loop Hall technology delivers higher linearity and lower temperature drift than open-loop sensors. 13.4 kV isolation withstand voltage far exceeds most competitors, providing unparalleled safety for power equipment and operators. -40°C to 70°C wide operating temperature ensures long-term stable operation in extreme climates – ideal for outdoor cabinets, frigid northern regions, and hot southern environments. With sub-1 µs response time, it captures transient overcurrent/short-circuit waveforms, giving protection circuits precious reaction time. The enhanced EMI immunity keeps signals clean even in harsh environments like inverters and welders, greatly reducing false alarms and system malfunctions.