855-4105/300-101

Current Sense Transformers Overview

The WAGO 855-4105/300-101 is a split-core current transformer designed for non-invasive primary current measurement. It features a primary rated current of 300 A and a secondary rated current of 5 A, ensuring compatibility with standard instrumentation. The device operates within a frequency range of 50 Hz to 60 Hz and supports a rated power of 1 VA. Classified under accuracy class 1, it provides reliable signal conversion for monitoring applications. The unit utilizes chassis mounting for secure installation on panels or enclosures.

Current Sense Transformers Feature Summary

• Non-invasive split-core design allows installation around existing conductors without circuit interruption.
• Chassis mount configuration ensures stable positioning on equipment panels or enclosures.
• Accuracy class 1 classification supports precise current sensing requirements.

Current Sense Transformers Applications

• Electrical panel monitoring systems
• Industrial energy metering infrastructure
• Current sensing for protection relays

Current Sense Transformers Procurement Notes

Verify the specific primary current rating matches the application requirement of 300 A before procurement. Confirm that the secondary output aligns with the connected instrument's input specifications. Ensure the operating frequency range covers the system's 50 Hz or 60 Hz operation. Check physical dimensions against available chassis space to guarantee proper fitment during installation.

Current Sense Transformers Selection Notes

Select this component when non-invasive measurement of high primary currents is required without breaking the conductor. The 300 A rating suits heavy industrial loads. Consider the 1 VA burden capability to ensure connected devices do not exceed the transformer's capacity. Verify that the split-core mechanism accommodates the diameter of the busbar or cable being monitored.

Current Sense Transformers Part Context

This part belongs to the WAGO 855-4105 series of split-core current transformers. Variants in this series differ primarily by primary current ratings, such as 250 A or 400 A models. All units share similar construction principles, including chassis mounting and split-core functionality, tailored for different load magnitudes while maintaining consistent secondary outputs.

Current Sense Transformers Replacement Considerations

Direct substitutes include other WAGO 855-4105 variants with matching electrical characteristics. Cross-manufacturer replacements require verification of core diameter, mounting style, and accuracy class to ensure functional equivalence in the existing assembly.

Current Sense Transformers FAQ

What is the maximum primary current this transformer can handle?

The 855-4105/300-101 is rated for a primary current of 300 A.

Does this model require cutting the conductor for installation?

No, the split-core design allows the transformer to be opened and closed around the conductor without cutting or disconnecting it.