ATO-75-B333-D10

Current Sense Transformers Overview

The ATO-75-B333-D10 is a split-core current transformer manufactured by LEM USA Inc., designed for non-invasive measurement of alternating primary currents. It features a rated primary current of 75 A and provides a voltage output ratio of 333 mV at the rated primary current (IPr). The device operates within a frequency range of 50 Hz to 60 Hz and is classified as Class 1 accuracy. With a core opening dimension of 10 mm, it facilitates easy installation around conductors without circuit interruption. The unit supports applications up to 600 V CAT III PD2 with basic insulation requirements.

Current Sense Transformers Feature Summary

• Split-core design enabling non-invasive installation around existing busbars or cables
• High accuracy classification ensuring reliable current monitoring in industrial environments
• Low phase shift characteristics for precise signal integrity during measurement

Current Sense Transformers Applications

• Industrial power distribution systems requiring current monitoring
• Energy metering equipment for AC line current measurement
• Motor control centers for protection and feedback loops

Current Sense Transformers Procurement Notes

Verify that the required conductor diameter fits within the 10 mm core opening before procurement. Confirm that the system operating voltage does not exceed the 600 V CAT III PD2 insulation rating. Ensure compatibility with downstream signal conditioning circuits expecting a 333 mV output at 75 A. Check for specific mounting hardware requirements if chassis installation is planned.

Current Sense Transformers Selection Notes

Select this model when a non-invasive solution is preferred over solid-core transformers for retrofitting or frequent connection changes. Choose based on the 75 A rated current capacity and 333 mV output requirement. Consider the split-core form factor for ease of maintenance compared to fixed-loop alternatives. Validate frequency compatibility with standard 50/60 Hz power lines.

Current Sense Transformers Part Context

This component belongs to the ATO series of current transducers from LEM, which are engineered for robust performance in demanding electrical environments. The series emphasizes accuracy and ease of integration into power management systems. The ATO-75 variant specifically targets medium-current applications where high precision is necessary for effective load balancing and fault detection.

Current Sense Transformers Replacement Considerations

Direct substitutes include other LEM split-core models with matching 75 A ratings and similar output voltages, such as the ATO-75-B225-D10, though output ratios differ. Verify mechanical dimensions and mounting configurations when cross-referencing with competitors' products to ensure physical fit.