5RL-301

Current Sense Transformers Overview

The Sifam Tinsley Instrumentation Inc. 5RL-301 is a solid-core current transformer designed for indoor electrical measurement applications. It features a primary-to-secondary ratio of 300:5 A and operates within a frequency range of 50 Hz to 400 Hz. The unit provides a 600 V insulation level with a 10 kV basic impulse lightning withstand voltage (BIL). Rated at 12.5 VA, this instrument transformer delivers a low-amperage output proportional to the line current, suitable for integration with ammeters, wattmeters, and cross-current compensation systems.

Current Sense Transformers Feature Summary

• Provides a proportional low-amperage secondary output relative to the primary line current
• Designed for free-hanging in-line installation without requiring external mounting hardware
• Supports operation across a wide frequency spectrum from 50 Hz to 400 Hz

Current Sense Transformers Applications

• Integration with panel-mounted ammeters for current monitoring
• Connection to wattmeters for power measurement circuits
• Cross-current compensation systems in industrial control panels

Current Sense Transformers Procurement Notes

Verify that the required operating frequency falls within the 50 Hz to 400 Hz specification before procurement. Confirm that the system voltage does not exceed the 600 V insulation rating. Ensure the connected burden load remains within the 12.5 VA limit to maintain accuracy. Check if reconditioned units require specific testing reports for compliance with internal quality standards.

Current Sense Transformers Selection Notes

Select the 5RL-301 when a 300:5 A transformation ratio is required for indoor environments. This model is appropriate for applications involving frequencies up to 400 Hz, distinguishing it from standard 60 Hz only transformers. Consider the 12.5 VA rating when determining compatibility with downstream measuring instruments. The solid-core design simplifies installation by allowing the conductor to pass directly through the center aperture.

Current Sense Transformers Part Context

The 5RL series represents a line of solid-core current transformers manufactured by Sifam Tinsley Instrumentation Inc., formerly associated with GE Current Transformers. These devices are classified as instrument transformers used for stepping down high currents for safe measurement. The 5RL-301 specifically denotes the 300:5 A variant within this family, maintaining consistent physical dimensions and mounting characteristics across the series.

Current Sense Transformers Replacement Considerations

Direct replacement requires matching the 300:5 A ratio, 600 V insulation class, and 12.5 VA burden rating. Verify frequency compatibility if the application involves variable frequency drives or higher frequency sources. Physical clearance for the free-hanging in-line configuration must be confirmed.