LA 55-P
Overview
The LA 55-P is a closed-loop current transducer that utilizes the Hall effect to provide accurate, galvanic isolation between the primary circuit and the secondary circuit. It is designed for electronic measurement of currents including DC, AC, pulsed, and mixed waveforms with a 50A nominal rating and a measurement range up to 70A. The device features a current output with a 1:1000 conversion ratio and a fast response time of 1us.
Why Choose This Part
The closed-loop architecture ensures excellent linearity of 0.15 percent and a wide frequency bandwidth from DC up to 200kHz. It offers high immunity to external interference and features no insertion losses in the measured circuit. The sensor is housed in a UL 94-V0 recognized insulating plastic case, providing high reliability for industrial environments.
Applications
Key Specifications
Getting Started
Integration requires a bipolar power supply between +/-12V and +/-15V and a secondary burden resistor (Rm) to convert the current output into a measurable voltage. For PCB layout, ensure the three pins (positive supply, negative supply, and output) are placed with adequate creepage distances according to your isolation requirements. Calibration is typically not required due to the factory-defined 1:1000 turns ratio.
