1305

Overview

The Simpson Electric Model 1305 is a current transformer designed for industrial applications. It features a donut core configuration with a primary rating of 400A and a secondary output of 5A. This component facilitates accurate current measurement within electrical systems by stepping down high primary currents to a standardized lower level suitable for metering devices.

Feature Summary

• Donut core construction for through-hole installation
• Step-down transformation from 400A primary to 5A secondary
• Designed for integration with panel meters and test instruments

Applications

• Industrial control panels
• Electrical power distribution monitoring
• Integration with analog or digital panel meters

Procurement Notes

Verify the specific datasheet version and physical dimensions against the installation space requirements. Confirm that the primary conductor size matches the 400A rating and that the connected load impedance is within the transformer's burden limits to ensure accuracy. Check for any specific mounting hardware requirements not included in the standard package.

Selection Notes

Select this model when a 400:5 ratio is required for non-invasive current sensing. Ensure the operating frequency matches the system design, typically 50/60Hz for general industrial use. Consider the insulation class and environmental rating if the installation location has specific temperature or humidity constraints compared to standard indoor conditions.

Part Context

Simpson Electric specializes in test instruments and measurement equipment. The Model 1305 belongs to their line of current transformers, which are passive components used to interface high-current circuits with low-current measuring devices. These components are essential for safety and accuracy in electrical monitoring systems.

Replacement Considerations

Direct replacements must maintain the 400:5 ratio and donut form factor. Verify that the replacement unit meets the same accuracy class and burden specifications. Physical aperture size compatibility is critical for retrofitting existing installations without modifying the busbar or cable layout.