LTC1000-SF/SP19,LTC 1000-SF/SP19

LTC1000-SF/SP19 Product Overview

The LTC1000-SF/SP19 is a closed-loop Hall-effect current sensor from LEM, a world leader in electrical measurement. Designed for demanding applications such as rail traction, industrial automation, and renewable energy, this sensor offers a rated current of 1000 A with a maximum measuring range up to 3000 A. It accurately measures DC, AC, and pulse currents, providing a secondary instantaneous current output (250 mA). With a wide supply voltage range of ±15 V to ±24 V DC and an operating temperature range from -40°C to +85°C, it performs reliably in harsh industrial environments.

In real-world engineering, current measurement accuracy directly impacts system safety and energy efficiency. Thanks to closed-loop Hall magnetic compensation technology, the LTC1000-SF/SP19 achieves an overall accuracy of ±0.4% and linearity of ±0.1%, capturing even the smallest current fluctuations. Its 100 kHz bandwidth enables clear detection of high-frequency ripple and harmonics, while a 1 µs response time handles transient conditions with ease. Moreover, the sensor features full electrical isolation between the primary (high-power) circuit and secondary (electronic) circuit, with an isolation test voltage of 13.4 kV / 50 Hz / 1 min – ensuring safety in high-voltage environments. These technical advantages make the LTC1000-SF/SP19 a superior choice for high-precision current detection.

LTC1000-SF/SP19 Key Advantages

±0.4% Accuracy & ±0.1% Linearity – Capture Every Ampere Precisely
Utilizing closed-loop magnetic compensation Hall technology, the LTC1000-SF/SP19 delivers an overall accuracy of ±0.4% and linearity of ±0.1%, ensuring highly reliable current measurements. In applications like photovoltaic inverters, EV chargers, and industrial drives, this high precision reduces energy loss and metering disputes, making it the ideal choice for those who demand uncompromising accuracy and long-term stability.

Closed-Loop Hall Technology – Superior Anti-Interference & Dynamic Response
The closed-loop (magnetic compensation) design ensures excellent performance when measuring DC, AC, and pulse currents. Compared to open-loop solutions, closed-loop sensors offer higher linearity, lower temperature drift, and faster response. With a 1 µs response time and 100 kHz bandwidth, the sensor accurately captures transient current changes and harmonics. This stability and noise immunity are especially valuable in industrial environments with complex electromagnetic interference and high-voltage conditions.

13.4 kV High Isolation Voltage – Built-In Safety Barrier
Electrical isolation is critical for safe high-voltage current measurement. The LTC1000-SF/SP19 provides complete galvanic isolation between primary and secondary circuits, with an isolation test voltage of 13.4 kV / 50 Hz / 1 min, ensuring stable operation in 1500 V systems. This feature makes it a safety cornerstone for applications such as traction converters and high-voltage DC bus monitoring.

-40°C to +85°C Wide Operating Temperature – Reliable in Extreme Conditions
The sensor operates continuously from -40°C to +85°C, maintaining excellent accuracy whether in freezing winters or hot outdoor environments. Low temperature drift ensures measurement stability across wide temperature swings, making it ideal for rail, wind power converters, energy storage systems, and other outdoor or harsh-condition deployments.

Modular & Flexible Design – Adaptable to Multiple Mounting Options
With a compact modular design, the LTC1000-SF/SP19 supports horizontal or vertical mounting, with or without a busbar. Three different mounting foot options are available. Secondary connections accommodate M5 screws and Faston (6.3×0.8 mm) terminals, greatly simplifying system integration and offering engineers flexible layout choices for various electrical cabinets and enclosures.

Zero Insertion Loss – Energy Efficient and Eco-Friendly
The non-contact measurement principle introduces no insertion loss to the primary circuit, achieving high accuracy while maintaining system efficiency. Whether for long-running industrial lines or battery-powered systems sensitive to energy consumption, this feature helps reduce operating costs over the long term. 

LTC1000-SF/SP19 Industry Applications

Rail Traction Systems – Safety-Driven Precision Measurement
In rail transport, current sensor accuracy and reliability directly affect operational safety. The LTC1000-SF/SP19 is specifically designed for traction applications and has been proven in numerous global rail projects. It complies with EN 50155 railway standards, European EMC Directive 89/336/EEC, CE marking, and NFF 16101/2 fire/smoke safety requirements – making it an ideal upgrade for rail power supply monitoring systems.

Renewable Energy & Energy Storage – Precision for Clean Power
In PV inverters and energy storage systems, current measurement accuracy directly impacts generation efficiency and overall system performance. The LTC1000-SF/SP19 has been successfully deployed in DC-side monitoring of string PV inverters, maintaining linearity error below 0.3% even at 65°C panel temperatures. This ensures accurate maximum power point tracking (MPPT) and maximizes energy yield. With ±0.4% accuracy and 100 kHz bandwidth, the sensor reliably captures PV ripple currents and BMS charge/discharge states, providing accurate feedback for PV inverters and power conversion systems (PCS).

EV Charging Infrastructure – Key to Accurate Billing
As EV penetration rises and charging power levels increase, current measurement accuracy becomes ever more critical. The 1 µs response time and wide temperature range of the LTC1000-SF/SP19 make it a reliable choice for real-time current monitoring in 120 kW DC fast chargers. High-accuracy current measurement not only reduces billing disputes and protects operator revenue but also enables optimized charging strategies and improved efficiency – a core competitive advantage for EV charger manufacturers.

Industrial Drives & Servo Systems – Sensing Core for Smart Manufacturing
With growing demand for energy management in industrial automation and smart manufacturing, energy monitoring systems using the LTC1000-SF/SP19 help enterprises track real-time equipment consumption, optimize processes, and achieve significant energy savings and cost reduction. Its 1 µs response to load transients and exceptional EMI immunity make it an ideal choice for current feedback and protection in servo drives, VFDs, and other critical industrial equipment.

LTC1000-SF/SP19 Technical Specifications