ZSCT30-31

Overview

The Littelfuse ZSCT30-31 is an industrial current transformer designed for panel mounting. It features a primary current rating of 30 A and a turns ratio of 600:1, corresponding to a secondary output of 0.05 A. The device offers a 3% accuracy class and utilizes a 31 mm aperture. Constructed without flux condensers, it is engineered for precise detection of low-level earth-leakage currents when paired with compatible Littelfuse relays.

Feature Summary

• Designed for detecting low levels of earth-leakage current
• Compatible with Littelfuse relay systems
• Panel mounting configuration

Applications

• Earth-leakage current detection in industrial panels
• Integration with Littelfuse current-sensitive relays
• Ground fault monitoring systems

Procurement Notes

Verify the specific datasheet version to confirm mechanical dimensions and electrical tolerances. Ensure compatibility with the intended Littelfuse relay model for proper signal processing. Confirm that the 31 mm aperture accommodates the target conductor size. Check for any ordering suffixes that may indicate variations in packaging or accessories.

Selection Notes

Select this component when a 30 A primary rating and 600:1 ratio are required for earth-leakage applications. The 31 mm hole size dictates the maximum cable diameter. Consider the 3% accuracy class for precision requirements. Verify panel mounting constraints before finalizing the design.

Part Context

This part belongs to the ZSCT series of current transformers manufactured by Littelfuse Inc. The series is specifically engineered for use with Littelfuse relays to monitor ground faults. The ZSCT30-31 variant provides a standardized interface for industrial protection schemes requiring reliable leakage current sensing.

Replacement Considerations

Consult official Littelfuse documentation for direct substitutes. Cross-reference primary current ratings, aperture sizes, and turns ratios. Ensure replacement parts maintain compatibility with existing relay interfaces.