DV2800/SP4 Voltage Sensor – Precision Guardian for Industrial & Traction Systems

DV2800/SP4 Product Overview

The DV2800/SP4 is a high-performance voltage sensor from LEM (Switzerland), designed specifically for medium- and high-voltage industrial and traction applications. As a global leader in electrical measurement, LEM brings more than 40 years of deep technical expertise to deliver accurate and reliable solutions for rail transportation, industrial drives, renewable energy, and more. With outstanding overall accuracy, excellent insulation performance, and a compact, rugged design, the DV2800/SP4 sets the benchmark for medium- and high-voltage measurement.

Why Choose the DV2800/SP4?

Industrial-grade accuracy for reliable measurements
Based on advanced insulated digital technology, the DV2800/SP4 achieves an exceptional overall accuracy of 0.3%. It performs bipolar, isolated measurement of AC+DC mixed signals, ensuring stable and precise output under all operating conditions. Whether it is transient voltage fluctuation in high-frequency inverters or cumulative voltage drift in long-running traction systems, this sensor captures it all, providing a solid data foundation for system control.

Ultra-wide range for broad applicability
Nominal voltage 2800 V, maximum measurable range up to 4200 V – covering the complete medium- to high-voltage spectrum. Rated output is ±50 mA instantaneous current, safely and accurately converting the high-side voltage into an easy-to-process low-level signal, while providing galvanic isolation between primary and secondary sides.

Robust and durable – withstands extreme environments
Wide operating temperature range from –40 °C to +85 °C – stable performance in heat or cold. High insulation test voltage of 18.5 kVRMS / 50 Hz / 1 minute ensures reliable operation even in harsh electromagnetic environments. Partial discharge extinction voltage of 7 kVRMS @ 10 pC provides a solid safety margin for longterm reliability.

Compact design for easy installation
Panel mounting with M5 studs for input/output, secured with safety nuts. The compact, space-saving design facilitates easy integration into crowded cabinets.

Flexible compatibility for easy retrofitting
The DV2800/SP4 is mechanically and electrically compatible with LEM’s CV4 and LV 200-AW/2 series, making it a drop-in replacement for existing systems. This greatly reduces upgrade costs and technical risks.

DV2800/SP4 Key Technical Parameters

DV2800/SP4 Typical Applications

Thanks to its outstanding performance, the DV2800/SP4 is the first choice for demanding industrial applications. Recommended by LEM for:

Railway traction systems
A key component of train propulsion systems. Widely used in single-phase and three-phase inverters, traction converters, auxiliary converters, and braking choppers – providing accurate voltage monitoring and feedback control for the train’s power system.

Renewable energy generation
In solar PV inverters, wind turbine generators, and other energy conversion equipment, the DV2800/SP4 accurately monitors DClink and AC voltages, delivering real-time, reliable data to the inverter control algorithm, supporting efficient cleanenergy conversion and grid connection.

High-power industrial drives
In heavy industries like metallurgy, mining, and cranes, high-power variable-frequency drives demand extreme accuracy and reliability from voltage monitoring. With excellent noise immunity and a wide measuring range, the DV2800/SP4 is the ideal choice for these high-power drive systems.

Grid monitoring & power electronics
In substation monitoring systems, active filters, static VAR generators (SVG), and other power electronic equipment, the DV2800/SP4 handles critical voltage acquisition, providing accurate data for safe, stable grid operation.

Uninterruptible power supplies (UPS) and switch-mode power supplies
High-accuracy voltage monitoring is essential for power quality. The DV2800/SP4 is widely used in high-end power supply equipment to ensure reliable, stable power to loads.

DV2800/SP4 LEM – The Global Leader in Electrical Transducers

Founded in Geneva, Switzerland in 1972, LEM is the inventor and global leader in electrical measurement. Specialising in current and voltage sensing solutions, LEM’s products are trusted worldwide in industrial automation, renewable energy, rail transportation, automotive, and more. The DV2800/SP4 is a true reflection of LEM’s leadership in highvoltage measurement, embodying the industry’s best design philosophy and manufacturing quality.