CT200

Overview

The Littelfuse CT200 is a current sense transformer designed for detecting earth-leakage or phase currents. It features an inside diameter of 56 mm and supports a secondary current of 5 A. The unit delivers a 2 VA output rating with a 10P10 accuracy class, ensuring ±3% precision at rated current. Operating within a maximum temperature of +60°C, the device integrates with Littelfuse relays for industrial applications.

Feature Summary

• Detects earth-leakage or phase currents when used with compatible Littelfuse relays
• Provides high-precision measurement with 10P10 accuracy class performance
• Supports standard secondary current output for relay integration

Applications

• Earth-leakage detection in electrical systems
• Phase current monitoring
• Integration with Littelfuse relay protection circuits

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required relay interfaces and mounting configurations. Confirm that the 56 mm inner diameter fits the conductor size in your application. Check for CSA and UL certification requirements if operating in regulated markets. Ensure the 60°C maximum operating temperature aligns with the environmental conditions of the installation site.

Selection Notes

Select this component when precise phase or ground fault current detection is required for relay-based protection schemes. The 56 mm aperture dictates the primary conductor size constraints. Consider the 2 VA burden capability to ensure downstream relay coils operate correctly without saturation. Verify ambient temperature limits against the +60°C specification before deployment in enclosed or high-heat environments.

Part Context

The CT200 belongs to the CT200 series of current transformers manufactured by Littelfuse Inc. This series focuses on providing reliable current sensing solutions for industrial safety and control applications. The component serves as a critical interface between high-current conductors and low-current relay inputs.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Users must verify mechanical fit and electrical specifications carefully when considering alternative current transformers from other manufacturers.