7RL-102

Current Sense Transformers Overview

The Sifam Tinsley Instrumentation Inc. model 7RL-102 is a single-ratio current transformer designed for metering applications. It features a round doughnut case with a 2.5-inch inner diameter aperture and includes 24-inch lead wires constructed from 16 AWG insulation. The unit operates at 60 Hz with a primary-to-secondary current ratio of 1000:5, delivering a secondary output of 5A. It supports a maximum burden of 35 VA and maintains a metering accuracy class of 1%. The device is rated for indoor use with a 10 kV basic impulse level (BIL) and a rating factor of 1.0.

Current Sense Transformers Feature Summary

• Single-ratio design with a fixed 1000:5 transformation ratio
• Round doughnut construction with a 2.5-inch window aperture
• Integrated 24-inch 16 AWG lead wires for direct connection
• Metering class accuracy of 1% with 35 VA burden capacity

Current Sense Transformers Applications

• Indoor electrical panel metering
• Current monitoring in 60 Hz power systems
• Integration with analog or digital ammeters
• Energy measurement circuits requiring 1% accuracy

Current Sense Transformers Procurement Notes

Verify that the required aperture size matches the conductor dimensions, as the 2.5-inch window is fixed. Confirm compatibility with 60 Hz system frequency and ensure the connected burden does not exceed 35 VA to maintain the specified 1% accuracy class. Check that the 10 kV BIL rating meets the installation's insulation requirements. Ensure the 16 AWG lead length suits the control panel layout.

Current Sense Transformers Selection Notes

Select this component when a single-ratio transformer is needed for precise metering rather than protection. The 1000:5 ratio suits high-current lines where step-down conversion is necessary for standard 5A instruments. Consider the physical constraints of the 2.5-inch aperture and 24-inch leads during panel design. This model is suitable for indoor environments only due to its specific insulation and housing characteristics.

Current Sense Transformers Part Context

The 7RL series represents a line of ANSI-standard current transformers manufactured by Sifam Tinsley. These units are engineered for reliable performance in industrial and commercial power distribution systems. The 7RL-102 specifically adheres to traditional American sizing conventions, utilizing inch-based measurements for its aperture and lead lengths, distinguishing it from metric-oriented international models.

Current Sense Transformers Replacement Considerations

• NK 7RL102-NK
• GE / ITI 7RL-102
• Crompton Instruments CI-7RL-102

Current Sense Transformers FAQ

What is the maximum burden capacity of the 7RL-102?

The maximum burden capacity is 35 VA.

Does the 7RL-102 support variable ratios?

No, it is a single-ratio transformer with a fixed 1000:5 ratio.

What is the insulation voltage rating?

The unit has a 10 kV Basic Impulse Level (BIL) rating.