LV100-4000/SP3,LV 100-4000/SP3

‌LV100-4000/SP3 Closed-Loop Voltage Sensor —— The High-Value Sensing Solution for Industrial High-Voltage Systems

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LV100-4000/SP3 ‌Core Features‌
Leveraging ‌closed-loop magnetic compensation Hall technology‌, it achieves zero-flux dynamic balance between primary and secondary sides, completely eliminating drift and nonlinear errors to deliver ‌high-precision, low-noise, delay-free‌ voltage signals even in complex industrial environments.
‌Rated Measurement Capability‌: Supports a rated voltage of ‌4000 V RMS‌, with a measurement range extended to ‌±6000 V‌, specifically engineered for medium- and high-voltage DC bus monitoring in industrial converters, energy storage, and high-power power systems.
‌Industrial-Grade Electrical Isolation‌: Primary-to-secondary insulation withstands ‌12 kV RMS‌, complying with ‌EN50178‌ and ‌IEC 61010-1‌ industrial safety standards, ensuring signal purity and system safety under high-interference, high-voltage conditions.
‌Zero Insertion Loss Design‌: Integrated high-precision primary resistor eliminates the need for external sampling components, simplifying system architecture, avoiding additional thermal losses and electromagnetic interference, and enhancing overall efficiency.
‌Wide Temperature Range Operation‌: Operates reliably across ‌-25°C to +70°C‌, adapting to diverse thermal environments such as industrial plants, substations, and automated production lines for long-term stability.
‌Fast Transient Response‌: Response time under ‌200 μs‌ precisely captures voltage transients and pulse fluctuations, meeting real-time demands of dynamic control, overvoltage protection, and energy recovery applications.

LV100-4000/SP3 ‌Technical Specifications‌

‌Sensor Type‌: Closed-loop Hall effect voltage sensor

‌Rated Voltage‌: 4000 V RMS

‌Measurement Range‌: ±6000 V

‌Secondary Output Signal‌: Linear proportional current output (typical 50 mA)

‌Supply Voltage‌: ±15 V to ±24 V DC bipolar (external)

‌Response Time‌: ≤ 200 μs

‌Bandwidth‌: DC ~ 100 kHz

‌Accuracy Class‌: ±0.9% F.S. (over full temperature range)

‌Temperature Drift‌: ≤ 0.6 mA (-25°C to +70°C)

‌Insulation Withstand Voltage‌: 12 kV RMS / 50 Hz / 1 min (primary-secondary isolation)

‌Operating Temperature‌: -25°C to +70°C

‌Mounting Method‌: Panel mount, primary and secondary connections via M5 threaded terminals

‌Protection Standard‌: Housing complies with UL94-V0 flammability rating, suitable for high-EMI, high-humidity industrial environments

LV100-4000/SP3 ‌Typical Applications‌

‌AC Variable Frequency Drives and Servo Systems‌: Real-time DC bus voltage monitoring for precise speed and torque control

‌Static Converters and DC Motor Drives‌: Stable voltage feedback to optimize power conversion efficiency

‌Uninterruptible Power Supply (UPS) Systems‌: Closed-loop DC voltage regulation to ensure continuous load power supply

‌Industrial Welding Power Supplies‌: Precise arc voltage monitoring to enhance weld quality and process consistency

‌Photovoltaic and Energy Storage Inverters‌: DC bus voltage acquisition to support Maximum Power Point Tracking (MPPT) and islanding detection logic

‌Why Choose LV100-4000/SP3?‌
As a high-precision closed-loop voltage sensor from LEM’s LV series designed for ‌general industrial applications‌, the LV100-4000/SP3 delivers an exceptional balance of performance and cost.
Its combination of ‌±0.9% accuracy‌ and ‌12 kV insulation withstand‌ rivals the railway-grade SP9 variant—without the added cost of EN50155 certification—making it the ‌most cost-effective choice‌ for industrial automation systems.
The SP3 variant is optimized for ‌industrial environments‌: compact, fast-responding, and highly resistant to electromagnetic interference, ideal for VFDs, UPS units, and welding equipment outside rail transit applications. Its plug-and-play compatibility simplifies integration.