2RL-251

Overview

The Sifam Tinsley Instrumentation Inc. model 2RL-251 is a current sense transformer designed for electrical measurement applications. It features a primary ampere rating of 250 A and provides a secondary output ratio of 250:5. The device operates within a frequency spectrum ranging from 50 Hz to 400 Hz, supporting broad-spectrum utility and industrial power monitoring. Constructed as a free-hanging in-line unit, it facilitates direct integration into power distribution circuits without invasive modifications.

Feature Summary

• Provides precise current sensing with a fixed 250:5 transformation ratio
• Supports wide frequency operation from 50 Hz to 400 Hz
• Designed for free-hanging in-line installation configurations

Applications

• Industrial power distribution monitoring
• Electrical panel metering systems
• Broad-spectrum utility frequency measurement

Procurement Notes

Verify the specific datasheet requirements for burden resistance and accuracy class before procurement. Confirm that the 250:5 ratio aligns with downstream metering or protection relay input specifications. Ensure the operating environment supports the specified frequency range of 50 Hz to 400 Hz for optimal performance.

Selection Notes

Select this component when a robust, non-invasive current sensing solution is required for high-amperage circuits up to 250 A. The in-line design simplifies installation compared to split-core alternatives. Consider the 50–400 Hz operational bandwidth to ensure compatibility with variable frequency drives or standard utility frequencies.

Part Context

This part belongs to the current sense transformer category within the Sifam Tinsley Instrumentation portfolio. It serves as a critical interface between high-current primary conductors and low-current secondary measurement devices, enabling accurate data acquisition for monitoring and control systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify mechanical mounting dimensions and terminal configuration compatibility if considering alternative manufacturers.