CRZ8465-2K5W

Overview

The CRZ8465-2K5W is a zero sequence current transformer manufactured by CR Magnetics Inc. It features a 1:2000:5 current ratio and operates within a frequency range of 50Hz to 60Hz. The secondary winding has a DC resistance of 170 Ohms. Designed for free-hanging in-line mounting, this component utilizes a split-core architecture to facilitate non-invasive installation around conductors. The device is RoHS compliant and classified under EAR99 export control categories.

Feature Summary

• Split-core design enables non-invasive installation around existing busbars or cables without circuit interruption.
• Zero sequence configuration specifically detects ground fault currents and unbalanced phase conditions.
• In-line mounting style allows for flexible integration into electrical panels and switchgear assemblies.

Applications

• Ground fault detection systems in industrial power distribution networks
• Protection relaying circuits requiring zero sequence current input
• Electrical panel monitoring for unbalanced load analysis

Procurement Notes

Verify the specific split-core mechanism compatibility with the target conductor diameter before procurement. Confirm that the 170 Ohm secondary impedance aligns with the connected relay or metering input requirements. Ensure the operating frequency range matches the system's nominal frequency to maintain accuracy. Check RoHS compliance documentation if environmental regulations apply to the end product.

Selection Notes

Select this model when zero sequence current measurement is required rather than individual phase sensing. The split-core design is essential for retrofitting existing installations where permanent wiring modifications are not feasible. Consider the 1:2000:5 ratio to ensure the output signal level is appropriate for the downstream protection device sensitivity. Evaluate the physical dimensions to ensure adequate clearance within the enclosure.

Part Context

This component belongs to the CRZ series of current sense transformers from CR Magnetics Inc., specialized for zero sequence applications. Unlike standard phase current transformers, it aggregates vector sums of currents to identify leakage or ground faults. The series supports various ratios and core designs tailored for different protection schemes in medium and low voltage systems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify mechanical fit and electrical parameters against any alternative models from other manufacturers to ensure functional equivalence in zero sequence protection circuits.