LF 2005-S/SP13 Closed-Loop Hall Effect Current Sensor – Accurate 2000 A Measurement for High-Power Industrial Applications

LF 2005-S/SP13 Product Overview

The LF 2005-S/SP13 employs advanced closed-loop Hall effect technology to measure DC, AC and pulsed currents with high precision. Its rated primary current is 2000 ARMS, and the maximum measurable range extends to 3500 A. The sensor provides galvanic isolation between the high-power primary circuit and the secondary electronics. It is widely used in AC variable speed drives, DC motor drives, uninterruptible power supplies (UPS), switch-mode power supplies and welding equipment.

LF 2005-S/SP13 Key Technical Advantages

High Accuracy – Minimal Error

At 25 °C, the accuracy is ±0.3 %; typical linearity error is below 0.1 %. Thanks to the inherent advantages of closed-loop Hall technology, the sensor maintains excellent linearity and low temperature drift over the full temperature range. Performance remains stable across a wide operating temperature range from -40 °C to +85 °C, ensuring reliable measurement even in extreme conditions.

Wide Current Range & Strong Overload Capability

Rated primary current: 2000 A; measuring range up to ±3500 A. The sensor can accurately detect DC, AC and pulsed currents. Whether running continuously at rated current or handling sudden overloads, the LF 2005-S/SP13 provides sufficient safety margin to protect your system.

Extremely Fast Response – Precise Tracking

Step response time (90 %) < 1 μs – it can accurately track transient current changes with di/dt exceeding 50 A/μs. The frequency bandwidth covers DC to 100 kHz. For applications such as welding equipment or high-frequency switching power supplies that require real-time tracking of fast high-current changes, this sensor delivers microsecond response to provide the control system with accurate feedback.

Safe & Reliable – Galvanic Isolation

The sensor features a UL 94-V0 flame-retardant insulated housing. Galvanic isolation between primary and secondary circuits is excellent, with an AC insulation test voltage of 6 kV, fully compliant with EN 50178:1997 – maximising system safety.

Rugged & Durable – Designed for Harsh Environments

Operating temperature range: -40 °C to +85 °C – suitable for cold to hot industrial environments

Enclosure protection: compact, robust closed design that resists dust, vibration and shock

Mounting: panelmount with a 60.5 × 20.5 mm (or Ø27 mm) aperture for easy primary conductor passage and seamless system integration

LF 2005-S/SP13 Product Specifications

LF 2005-S/SP13 Typical Applications

Drives & Motor Control

AC variable speed drives and servo motor drives – real-time monitoring of high currents in motor drive circuits, ensuring smooth operation under varying loads

Static converters for DC motor drives – meets demanding high-power current detection requirements for DC drive circuits, ensuring precise motor control

Power Supply Systems

Uninterruptible power supplies (UPS) – provides accurate charge/discharge current data for high-power UPS, enabling intelligent battery management and reliable backup power

Switch-mode power supplies (SMPS) – matches high-frequency, high-power current measurement, realising precise overcurrent protection and power control

Power supplies for welding equipment – satisfies the need for large currents and high dynamic response in welding power sources, improving welding process stability

Renewable Energy & Energy Storage

Renewable energy generation systems – current monitoring in solar PV inverters and wind turbine systems, contributing to efficient grid connection and operation

Battery-powered systems and energy storage equipment – current monitoring and protection for large battery banks, ensuring safe and reliable operation of energy storage systems

Industrial Control & Others

Frequency converters, battery chargers, high-frequency induction heating power supplies

Control and monitoring of pumps, fans and similar equipment

Laser power supplies, industrial power supplies, electroplating power supplies

Why Choose the LF 2005-S/SP13?

Compared to traditional current measurement methods, the LF 2005-S/SP13 eliminates the threat that a high-power primary loop can pose to the control system through its galvanic isolation. The ±0.3 % accuracy and < 1 μs response time made possible by closed-loop Hall technology ensure that your control system knows the primary current status accurately and in real time – enabling better, faster protection and control decisions.

One-sentence summary: Give your high-power equipment “eyes” – accurate, fast and reliable – to keep your system safe at all times.