CR2550-A

Overview

The CR2550-A is a low-cost remote current indicator manufactured by CR Magnetics Inc. It functions as a non-invasive solid core current sense transformer designed to provide visual indication of electrical current flow. The unit features an amber LED and has a turn-on point of 1.5 AAC full on. It supports a frequency range of 50Hz to 400Hz and operates within a temperature range of -30°C to +60°C. The maximum continuous rating is 20 AAC RMS, with a nominal current of 0.75 AAC RMS. The device utilizes a free-hanging in-line mounting type and measures approximately 1.094 inches in length.

Feature Summary

• Provides visual indication of electrical current flow using an integrated amber LED
• Non-invasive solid core design allows for easy installation without circuit interruption
• Factory calibrated turn-on point ensures reliable detection at specified current levels

Applications

• Industrial automation systems requiring current monitoring
• Electrical panel visualization for phase presence verification
• Low cost remote current sensing in control circuits

Procurement Notes

Verify the specific part number suffix against official CR Magnetics documentation to confirm LED color and turn-on specifications. Ensure the application frequency falls within the 50Hz to 400Hz operational range. Confirm that the ambient operating temperature remains between -30°C and +60°C during deployment. Cross-reference the maximum continuous rating of 20 AAC RMS with system load requirements to prevent saturation or damage.

Selection Notes

Select this component when a visual confirmation of current flow is required without breaking the conductor. The non-invasive solid core design simplifies retrofitting into existing wiring configurations. Consider the amber LED visibility requirements and the 1.5 AAC turn-on threshold relative to the minimum expected load current. Ensure the physical dimensions fit the available space for free-hanging in-line mounting.

Part Context

The CR2550 series represents a line of remote current indicators from CR Magnetics Inc. These devices combine a current transformer with a two-color LED mechanism to signal current presence. The series is engineered as a cost-effective solution for visual monitoring applications where traditional ammeters are impractical or too expensive.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.