855-405/400-501

Current Sense Transformers Overview

The WAGO 855-405/400-501 is a plug-in current transformer designed for non-invasive measurement of alternating currents. It features a primary rated current of 400 A and a secondary rated current of 5 A, providing a 400:5 transformation ratio. The device supports a rated power of 5 VA with an accuracy class of 1. It accommodates a feedthrough conductor diameter of up to 32 mm and operates within a frequency range of 50 Hz to 60 Hz. The unit utilizes chassis mounting for secure installation.

Current Sense Transformers Feature Summary

• Non-invasive solid core design allows for measurement without circuit interruption
• Pluggable construction facilitates easy integration into control systems
• Class 1 accuracy ensures reliable data transmission for monitoring applications

Current Sense Transformers Applications

• Industrial machinery current monitoring
• Electrical panel metering
• Power distribution system supervision

Current Sense Transformers Procurement Notes

Verify that the application requires a 400 A primary rating and 5 A secondary output. Confirm the measurement conductor diameter does not exceed 32 mm. Ensure the operating frequency aligns with the 50 Hz to 60 Hz specification. Check compatibility with existing chassis mounting requirements before procurement.

Current Sense Transformers Selection Notes

Select this model when non-invasive current sensing is required for high-amperage circuits. The 32 mm feedthrough aperture suits standard busbars or thick cables. Class 1 accuracy is suitable for general industrial monitoring rather than precision billing. Consider the 5 VA burden capacity when connecting downstream instrumentation.

Current Sense Transformers Part Context

This component belongs to WAGO's series of pluggable current transformers. These devices are engineered for DIN rail or chassis mounting in electrical enclosures. The series provides isolated signal conversion for protection relays and measuring instruments. The specific model addresses high-current applications requiring robust mechanical stability.

Current Sense Transformers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify interface compatibility and physical dimensions when evaluating alternative components from other manufacturers.