LV100-2500/SP3 High-Precision Closed-Loop Hall-Effect Voltage Transducer

LV100-2500/SP3 Brand: LEM – Global Leader in Electrical Measurement

In medium and high-voltage power electronics, the accuracy and reliability of voltage detection directly determine the safe operation and fault response speed of the entire system. The LV100-2500/SP3 voltage transducer, built by Switzerland’s LEM (pioneer of closed-loop Hall-effect technology), is a high-performance measuring component specifically engineered for 2500V class industrial equipment. It is widely used in high voltage variable frequency drives, servo drives, UPS systems, and renewable energy applications – trusted by premium equipment manufacturers worldwide.

LV100-2500/SP3 Product Overview

The LV100-2500/SP3 is a high-accuracy closed-loop Hall-effect voltage transducer from LEM’s LV100 series, designed for electronic measurement of DC, AC, and pulsed voltages. With a primary nominal voltage of 2500 V r.m.s. and a maximum measuring range extending to ±3750 V, it perfectly meets the voltage monitoring requirements of common industrial medium and high-voltage power systems – whether monitoring the DC bus of a 2500V-class VFD or providing voltage feedback for a renewable energy converter.

The transducer provides complete electrical isolation between the primary and secondary circuits, with a tested isolation voltage of 9 kV @ 50 Hz for 1 minute. This ensures the safety of downstream measurement circuits and eliminates groundpotential interference and electric shock risks – making it the go-to choice for high-voltage voltage detection.

Having undergone years of field application in industrial environments, tens of thousands of stable operating cases prove that – from high-voltage VFDs on factory floors to bus monitoring in solar, wind, and storage converter systems – the LV100-2500/SP3 consistently delivers outstanding stability for every highvoltage measurement.

LV100-2500/SP3 Key Advantages & Technical Features

✅ 1. Industry-Leading Measurement Accuracy

Using closed-loop Hall-effect compensation technology, the transducer achieves an overall accuracy of ±0.7% and linearity better than 0.1%. It provides consistent, distortionfree signals across the entire rated measuring range, ensuring accurate and reliable results under both wide input voltage swings and complex load variations.

✅ 2. Microsecond-Class Fast Response

Response time is only 170 µs (reaching 90% of the final output). This allows the transducer to capture voltage transients and spikes with exceptional speed, giving your overvoltage protection and dynamic control loops a critical response window – when an unexpected voltage surge or spike strikes in a high-voltage system, how quickly you detect the problem can determine the fate of the entire installation.

✅ 3. Very Low Temperature Drift

This model offers excellent long-term stability, with zero drift of only ±0.2 ~ ±0.3 mA/°C. Combined with a wide operating temperature range of 0°C to +70°C, the longterm stability is outstanding. Whether in hot workshops, sealed cabinets, or outdoor environments, measurement accuracy remains consistently high.

✅ 4. High Noise Immunity & Strong Insulation

The insulating plastic case meets UL 94-V0 (highest flame retardancy rating). The closed-loop compensation architecture provides superior common-mode and electromagnetic interference rejection, ensuring stable and error-free operation even in “electromagnetic heavy environments” filled with inverters and high-power switching devices. With an isolation withstand voltage of 9 kV @ 50 Hz for 1 minute, you donʼt have to worry about safety in high-voltage applications.

✅ 5. Integrated Primary Resistor – Simplifies Design

The primary resistor (R1) is integrated inside the housing, simplifying external circuitry, making PCB layout more compact, and speeding up assembly. The total weight is 850 grams.

LV100-2500/SP3 Technical Specifications

LV100-2500/SP3 Wide Range of Applications

With its ±3750 V measuring range, ±0.7% accuracy and 9 kV isolation rating, the LV100-2500/SP3 is ideal for many medium and high-voltage industrial applications:

✔ High-voltage VFDs & AC variable speed drives – Precision monitoring of inverter DC-bus voltage for efficient, smooth operation of high-power motors and extended equipment life.

✔ Photovoltaic inverters & wind power converters – Real-time monitoring of solar panel output voltage and each inverter stage, optimising energy conversion efficiency and accurately tracking the maximum power point – protecting every kilowatt-hour of green energy with precision in the renewables sector.

✔ Static converters & DC motor drives – Reliable voltage feedback in rectification and inversion stages, keeping the DC link stable and controllable.

✔ Uninterruptible power supplies (UPS) – Real-time monitoring of high-voltage input/output status in 380V/400V systems, ensuring critical loads receive stable power even during grid disturbances – safeguarding safe operation of data centres, hospitals and other key infrastructure.

✔ Welding equipment & switch-mode power supplies – Accurate voltage detection under high-voltage, high-transient conditions for consistent weld quality.

✔ Railway traction & energy storage systems – Measuring inverter and battery pack voltages to ensure operational safety and extend battery life, serving demanding industrial applications.

Why Buy From LV100-2500/SP3?

✅ Genuine product from authorised channels – Sourced directly from LEM or a first-tier authorised distributor. Every unit is brand new and original – no refurbished, bulk, or counterfeit products.

✅ Stock available, fast delivery – Thousands of units in stock. Quick response for both sample testing and volume orders.

✅ Professional technical support – For large customers and special applications, we provide full support from selection guidance to solution implementation.

✅ Peace-of-mind after-sales – 7-day quality guarantee, 100% functional testing before shipment. All orders are packed in heavy-duty anti-static packaging to ensure perfect delivery.