HAX1000-S Hall Effect Open-Loop Current Transducer

HAX1000-S Product Overview

The HAX1000-S is a flagship model in the renowned LEM HAX series. It is a high-precision Hall-effect open-loop current transducer specifically designed for highcurrent measurement applications. The device enables electronic measurement of DC, AC, pulsed, and mixed currents while providing reliable galvanic isolation between the primary circuit (high-voltage, high-power side) and the secondary circuit (electronic control side). It is widely used in industrial current sensing scenarios that demand high accuracy, reliability, and noise immunity.

Rated at 1000 A and capable of measuring up to ±3000 A (three times the rated value), the HAX1000-S comfortably handles everything from normal operation to momentary overloads. Based on LEM’s decades-proven Hall-effect open-loop technology, it combines a compact modular design, low power consumption, and excellent cost-effectiveness, making it a popular choice in industrial drives, power supplies, renewable energy, and welding equipment.

HAX1000-S Six Key Advantages

1. ±1 % High Accuracy – Trustworthy Data
At rated primary current, the HAX1000-S achieves an accuracy of ±1 % with a linearity error of also ≤ ±1 %. Every measurement is precise and reliable, giving you confidence in assessing your system's operating status.

2. 3× Wide Measuring Range – Handles Overloads with Ease
The standard range is 1000 A, while the maximum measurable range extends to ±3000 A – three times the rated current. For transient current surges caused by motor starting or load changes, you do not need a larger transducer; a single HAX1000-S covers all needs.

3. 5000 V High Galvanic Isolation – Safe and Secure
Primary-to-secondary isolation is rated at 5000 V (AC dielectric test level). Combined with a UL 94-V0 flame-retardant insulated plastic housing, it provides a reliable safety barrier for both personnel and equipment.

4. Fast Response – 5 µs
Response time is less than 5 µs, capturing every current fluctuation instantly. This gives control systems valuable milliseconds for fast regulation and precise protection. The DC ~ 25 kHz bandwidth covers a wide spectrum from DC to high-frequency currents.

5. Strong Anti-Interference Design – Stable Output, No Drift
Thanks to the Hall-effect open-loop principle and optimised electromagnetic shielding, the HAX1000-S is highly immune to external disturbances. Even in harsh industrial environments with inverters, high-power supplies, or welding machines, it delivers a stable and accurate output signal without corruption.

6. Low-Power Compact Design – Easy and Flexible Installation
With a small footprint (108 × 62 × 43 mm) and a weight of only about 450 g, it offers excellent space savings among kiloamp-class products, reducing cabinet space. Panel mounting is supported via M4 screws, and the modular design simplifies selection, installation, and maintenance. Power consumption is very low – typical supply current is only ±15 mA, maximum ±20 mA – placing minimal burden on the system power supply.

HAX1000-S Key Technical Specifications

HAX1000-S Typical Applications

With its outstanding performance, the HAX1000-S plays an essential role in many demanding applications:

Industrial AC drives – Used in AC variable frequency drives and servo motor drives for real-time motor current monitoring, enabling precise closed-loop control and smooth operation.

DC motor drives – Paired with static converters for DC motor drives, providing accurate current feedback to optimise torque and efficiency.

UPS and SMPS – Accurately detects load current, optimises power management, and ensures continuous, stable power to critical loads.

Welding equipment – Integrated with welding power sources to monitor output current in real time, ensuring consistent and stable welding quality.

Battery-powered systems – Provides current monitoring for various battery powered equipment, helping optimise charge/discharge management and extend battery life.

Renewable energy – Used in solar inverters and wind power systems to support efficient energy conversion and grid connection.

EV charging infrastructure – Enables precise current metering and protection control in electric vehicle charging stations.

Why Choose the LEM HAX1000-S?

In precision industrial applications, the reliability of a current transducer directly affects the safety and performance of the entire system. An inferior sensor can cause false alarms, protection failures, or even system shutdown. The HAX1000-S comes from LEM, the world-leading brand in current transducers with decades of proven quality in industrial, automotive, railway, and energy sectors. By choosing the HAX1000-S, you get:

Original quality assurance from a global brand – Decades of LEM expertise and a trusted reputation.

Industrial-grade design, proven in harsh environments – Wide operating temperature, high noise immunity, and long life, suitable for all kinds of tough conditions.

Wide measuring range and high overload capability – 3× extended range handles momentary overloads with ease.

Low-power, compact design – Reduces burden on the system power supply and saves cabinet space.

Flexible mounting for easy system integration – Quick deployment and lower maintenance costs.

5-year warranty and professional technical support