\\Gva1\datasheets\FI CHES~1\FTEN.pdf

## LEM LF 505-S Current Transducer Summary

The LEM LF 505-S is a high-accuracy, galvanically isolated current transducer designed for measuring currents from DC to pulsed signals up to 800A. Key features include:

Specifications:

Current Range: 0 - ±800A (primary) with 1:5000 conversion ratio
Secondary Current: 100mA nominal
Accuracy: ±0.6% at IPN (500A) and 25°C, excellent linearity (<0.1%)
Response Time: <1µs to 90% of IPN step (di/dt > 100A/µs)
Frequency Bandwidth: DC - 100kHz
Operating Temperature: -40°C to +70°C
Isolation: 3.8kV RMS AC isolation, 12.5kV impulse withstand voltage
Mechanical Mounting: Vertical or flat lying position with M4 screw fastening (or alternative for flat mounting)

Applications:

This transducer is suitable for a wide range of applications including:

AC variable speed drives and servo motor drives
Static converters for DC motor drives
Battery-powered systems
Uninterruptible Power Supplies (UPS)
Switched Mode Power Supplies (SMPS)
Welding applications

Safety:

Follow EN 50178, CEI 61010-1 standards and manufacturer's instructions for safe operation.
Some parts of the transducer can carry hazardous voltage; take precautions against electrical shock.
* Ensure conducting parts are inaccessible after installation.