CR5SFT-122

Current Sense Transformers Overview

The CR5SFT-122 is a non-invasive solid core current sense transformer manufactured by CR Magnetics Inc. Designed for chassis mounting, this component features a current rating of 1200 A and a current ratio of 1200:5. It operates within a frequency range of 50Hz to 400Hz, as specified in the primary datasheet, though other sources indicate a broader capability up to 3MHz. The unit measures 96.00mm in length and 54.60mm in width. This transformer provides accurate current sensing without breaking the primary circuit, utilizing a solid core design suitable for high-current applications requiring reliable isolation and measurement.

Current Sense Transformers Feature Summary

• Non-invasive solid core design eliminates the need to break the primary circuit for current measurement
• High current capacity rated at 1200 A with a standard 1200:5 transformation ratio
• Chassis mount configuration ensures secure installation in industrial control panels
• Operates effectively within power line frequencies and extends into higher frequency ranges

Current Sense Transformers Applications

• Industrial motor drive current monitoring
• Power distribution system protection circuits
• High-current AC load measurement in manufacturing equipment
• Energy metering systems requiring isolated current sensing

Current Sense Transformers Procurement Notes

Verify the specific frequency range requirement against project specifications, as documentation varies between 50Hz-400Hz and up to 3MHz. Confirm chassis mounting hole patterns match existing panel designs. Ensure the 1200A primary current does not exceed the transformer's thermal limits under continuous operation. Check for any required accessories such as mounting hardware or secondary burden resistors not included in the base package.

Current Sense Transformers Selection Notes

Select this model when high-amperage AC current sensing is required without interrupting the main power path. The solid core construction offers durability compared to split-core alternatives. Consider the physical dimensions of 96.00mm x 54.60mm for enclosure space planning. The 1200:5 ratio is suitable for interfacing with standard 5A input measurement devices or protective relays. Evaluate thermal performance if operating near the maximum 1200A rating continuously.

Current Sense Transformers Part Context

This component belongs to the CR5 series of current sense transformers from CR Magnetics Inc., designed for robust industrial environments. The series focuses on non-invasive sensing solutions that maintain circuit integrity while providing accurate feedback. The CR5SFT-122 specifically addresses high-current applications where traditional shunt resistors would introduce excessive power loss or heat generation. Its solid core design distinguishes it from split-core variants used for retrofitting existing installations.

Current Sense Transformers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. When replacing, ensure the new component matches the 1200A rating, 1200:5 ratio, and chassis mounting style. Verify dimensional compatibility with existing mounting brackets. Cross-reference frequency response requirements if the application involves harmonics or switching frequencies beyond standard power line ranges.