2SFT-251

Overview

The Sifam Tinsley Instrumentation Inc. Model 2SFT-251 is a precision current transformer designed for accurate measurement of alternating currents in industrial and power distribution environments. This component operates on the principle of electromagnetic induction, providing electrical isolation between the high-current primary circuit and the low-current secondary output connected to measuring instruments or protection relays. The device ensures high fidelity signal transfer with minimal phase angle error across its specified frequency range, typically 50Hz or 60Hz depending on regional standards. It features a robust construction suitable for panel mounting or busbar integration, offering reliable performance under continuous load conditions while maintaining safety compliance with international electrical standards for insulation and dielectric strength.

Feature Summary

• Provides galvanic isolation between primary high-current circuits and secondary measurement devices
• Ensures accurate current transformation with low phase displacement errors
• Constructed for durable operation in standard industrial power distribution panels

Applications

• Integration with ammeters and wattmeters for real-time current monitoring
• Connection to protective relay systems for overcurrent detection
• Use in energy metering installations for billing accuracy verification

Procurement Notes

Verify that the specific part number matches the required primary current rating and secondary output specification before ordering. Confirm physical dimensions and mounting style compatibility with existing panel cutouts. Ensure the voltage class meets the system's insulation requirements. Request certification documents confirming adherence to relevant safety and performance standards from the manufacturer or authorized distributor prior to final purchase approval.

Selection Notes

Select this model based on the required primary current magnitude and the input specifications of the connected measuring instrument. Evaluate the physical space constraints within the switchgear or control panel to ensure proper fitment. Consider the environmental conditions such as temperature range and humidity levels where the installation will occur. Verify that the burden capacity of the transformer supports the impedance of the downstream devices without introducing significant measurement errors.

Part Context

This component belongs to the series of current transformers manufactured by Sifam Tinsley Instrumentation Inc., specializing in instrumentation for power quality and distribution monitoring. These devices are engineered to replace older analog meters or integrate into modern digital monitoring systems. The 2SFT series represents a standard offering for general-purpose current sensing applications where reliability and accuracy are paramount for operational safety and efficiency.

Replacement Considerations

Consult official substitution lists from Sifam Tinsley for direct equivalents. Verify that any alternative part number matches the exact primary-to-secondary ratio and physical footprint. Cross-check terminal configurations and insulation ratings to ensure seamless integration without modifying existing wiring harnesses or panel structures.