LV25-1000/SP4,LV 25-1000/SP4

‌LV25-1000/SP4 Product Description — Industrial Voltage Sensing with Zero-Drift Precision

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LV25-1000/SP4 ‌Core Advantage: Closed-Loop Hall Technology, Engineered for Uncompromised Accuracy in Demanding Industrial Circuits‌
The LV25-1000/SP4 is not merely a voltage sensor — it is a ‌closed-loop Hall effect voltage transducer‌ designed by LEM to deliver ‌±0.8% measurement accuracy‌ across the full industrial operating range. Unlike open-loop alternatives, it employs ‌magnetic feedback compensation‌ to actively cancel flux imbalances in real time — eliminating drift, hysteresis, and temperature-induced error without software correction. Its ‌4.2 kVRMS galvanic isolation‌ and ‌-40°C to +85°C operational range‌ make it the ideal choice for systems where voltage integrity directly impacts safety, efficiency, and longevity.

LV25-1000/SP4 ‌Key Features: Precision Locked by Magnetic Feedback, Not Software‌

‌True Closed-Loop Operation‌: Real-time magnetic flux balancing ensures ‌<0.5% linearity error‌ even under dynamic or pulsed loads — critical for precise control in switching environments.

‌Integrated Primary Resistor Network‌: No external shunt resistors required — simplifies PCB layout, reduces component count, and minimizes failure points.

‌25 mA Proportional Output‌: Directly compatible with PLCs, data loggers, and analog input modules — no signal conditioning needed.

‌12 V to 15 V DC Bipolar Supply‌: Seamlessly integrates with standard industrial control power rails — no need for specialized voltage regulators.

‌Wide Input Range‌: Measures ‌10 V to 1500 V peak‌ (1000 V RMS nominal) with a single device — replaces multiple sensors in multi-voltage systems.

‌PCB or Panel Mountable‌: Designed for flexible integration — ideal for both new designs and retrofits in compact or space-constrained enclosures.

‌Zero Drift Over Temperature‌: Factory-trimmed and compensated — maintains accuracy from -40°C to +85°C without recalibration.

‌EMI-Resistant Design‌: Shielded core and differential sensing reject common-mode noise — performs reliably near VFDs, inverters, and high-frequency switching circuits.

‌UL94 V-0 Flame-Retardant Housing‌: Certified for continuous operation in dusty, humid, or chemically aggressive industrial environments.

‌No Calibration Required After Installation‌: Out-of-the-box accuracy — install and forget, reducing maintenance overhead and downtime.

LV25-1000/SP4 ‌Technical Specifications‌

‌Function‌: Closed-loop Hall effect voltage transducer

‌Nominal Input Voltage‌: 1000 V RMS

‌Measurement Range‌: 10 V – 1500 V (peak)

‌Output Signal‌: 25 mA (proportional to input voltage)

‌Supply Voltage‌: 12 V – 15 V DC (bipolar)

‌Accuracy‌: ±0.8% of nominal voltage @ 25°C

‌Linearity Error‌: <0.5%

‌Isolation Voltage‌: 4.2 kVRMS / 50 Hz (1 min)

‌Bandwidth‌: DC to 200 kHz

‌Response Time‌: <1 µs

‌Operating Temperature‌: -40°C to +85°C

‌Storage Temperature‌: -40°C to +100°C

‌Power Consumption‌: ≤150 mA @ 15 V

‌Mounting‌: PCB or panel (Faston 6.3 × 0.8 mm terminals)

‌Compliance‌: UL94 V-0, IEC 61010, EN 50178

‌Protection Class‌: IP20 (enclosed)

‌Lifetime‌: Designed for 20+ years of continuous industrial operation

LV25-1000/SP4 ‌Applications: Where Voltage Accuracy Is Non-Negotiable‌

‌Industrial Variable Frequency Drives (VFDs)‌: Monitors DC bus voltage in real time — enables precise torque control, overvoltage protection, and regenerative braking stability.

‌Renewable Energy Inverters‌: Measures input/output voltage in solar and wind power converters — critical for MPPT algorithms and grid synchronization.

‌Uninterruptible Power Supplies (UPS)‌: Tracks battery stack voltage during charge/discharge cycles — prevents deep discharge and ensures seamless utility-to-battery transfer.

‌Welding Power Supplies‌: Delivers real-time arc voltage feedback — enables stable arc formation and consistent weld quality in automated systems.

‌Railway Traction Systems‌: Monitors auxiliary power circuits in locomotives and metro systems — withstands vibration, EMI, and extreme thermal cycling.

‌High-Voltage Test & Calibration Equipment‌: Used in metrology labs and diagnostic tools — delivers lab-grade accuracy without external calibration.

‌Battery Management Systems (BMS)‌: Serves as system-level voltage reference in medium-voltage battery stacks — complements cell-level monitoring with robust, isolated sensing.

‌Why Choose LV25-1000/SP4?‌

‌Hardware-Enforced Reliability‌: No firmware, no microcontroller, no software bugs — measurement is analog, magnetic, and immutable.

‌Drop-In Replacement for Legacy Systems‌: Directly substitutes LV25-1000/SP1 and other variants — enables seamless upgrade without requalifying control loops.