CT-0200-D20

Overview

The Littelfuse CT-0200-D20 is a general-purpose current transformer designed for industrial applications. It features a donut-style core with a 2-inch (50.8 mm) sensor window, allowing for non-intrusive installation around primary conductors. The device operates at a primary voltage rating of 600 V and provides a turns ratio of 200:5, delivering a secondary current rating of 5 A. This configuration supports accurate current sensing in electrical systems requiring free-hanging mounting.

Feature Summary

• Donut-style construction with a 2-inch sensor window for easy conductor insertion
• Designed for free-hanging or inline mounting configurations
• Rated for 600 V primary voltage operation
• Provides a standard 200:5 current transformation ratio

Applications

• Industrial current monitoring and measurement
• Electrical panel metering systems
• Power distribution circuit sensing
• General purpose current transformers in 600 V systems

Procurement Notes

Verify the specific datasheet version from Littelfuse to confirm accuracy class and burden ratings, as these parameters are critical for metering precision. Ensure the primary conductor diameter fits within the 2-inch window clearance. Cross-reference the secondary output requirements with connected instrumentation to ensure compatibility with the 5 A rating.

Selection Notes

Select this model when a 200:5 ratio and 600 V insulation level are required. The 2-inch window accommodates larger busbars or cables without cutting. Consider the physical size constraints for free-hanging installation. Verify that the application does not require higher accuracy classes than standard general-purpose ratings provide.

Part Context

This component belongs to the Littelfuse CT series of current sense transformers. It is categorized under 600 V instrument transformers. The D20 suffix typically denotes the 2-inch window dimension within the product family. It serves as a passive sensing element for converting high primary currents to lower secondary currents for measurement.

FAQ

What is the maximum primary conductor size supported?

The CT-0200-D20 features a 2-inch (50.8 mm) sensor window, accommodating conductors up to this diameter.

Is this transformer suitable for outdoor use?

Datasheets specify it as a general-purpose unit; environmental sealing details should be verified in the official Littelfuse documentation for outdoor exposure.