CR4420S-75

Current Sensors Overview

The CR4420S-75 is a split-core AC current transducer manufactured by CR Magnetics Inc. It utilizes an adjustable transformer with conditioning for single-element measurement of alternating currents. The device supports an input range of 0 to 75 AAC and provides a 4 to 20mA output signal. It operates within a frequency band of 50Hz to 400Hz and maintains a precision of ±0.5%. The unit requires a 24VDC supply voltage, drawing a maximum of 45mA. Designed for bidirectional sensing, it features a module package suitable for DIN rail or panel mounting. The response time is specified at 250ms, and the operating temperature range extends from 0°C to 60°C.

Current Sensors Feature Summary

• Split-core design enables installation without breaking the primary circuit
• Adjustable transformer technology ensures accurate AC current measurement
• Bidirectional polarity allows detection of current flow in both directions

Current Sensors Applications

• Industrial power monitoring systems
• Electrical distribution panels
• Motor control centers
• Energy management solutions

Current Sensors Procurement Notes

Verify that the specific order matches the CR4420S-75 designation to ensure correct 75A rating and 4-20mA output configuration. Confirm that the application environment remains within the 0°C to 60°C operational limits. Ensure the power supply provides stable 24VDC without exceeding the 45mA current draw specification. Check compatibility with existing DIN rail or panel mounting infrastructure before finalizing procurement.

Current Sensors Selection Notes

Select this model when bidirectional AC current monitoring is required for circuits up to 75A. The split-core architecture is ideal for retrofits where conductor interruption is not feasible. Choose this variant over fixed-ratio sensors if adjustable calibration is necessary. Ensure the load frequency falls between 50Hz and 400Hz to maintain the stated ±0.5% precision. Verify that the 4-20mA output interface aligns with the receiving controller's input requirements.

Current Sensors Part Context

This component belongs to the CR4400 series of current transducers from CR Magnetics Inc. The series focuses on transformer-based sensing with integrated conditioning electronics. Unlike Hall effect models, this unit relies on magnetic induction for AC signals only. The 'S' suffix typically denotes the split-core form factor, distinguishing it from solid-core variants in the same product family.

Current Sensors Replacement Considerations

Direct substitutes include other CR4420S models with different current ratings, such as CR4420S-25 or CR4420S-20, provided the amperage requirements are lower. Cross-referencing with CR4450 series modules may be possible if higher sensitivity is needed, though output scaling must be verified. Ensure any replacement maintains the 24VDC supply and 4-20mA output characteristics.