Eaton RFMI31F Mechanical Interlock Kit - UL Listed
Part Number: RFMI31F
Quick Summary
The Eaton RFMI31F Mechanical Interlock Kit provides safe, fail-safe interlock control for RF frame fixed breakers in industrial panels. Without a proper interlock, operators risk mis-operation, arc flash, or panel damage during maintenance. It carries UL Listed, ANSI Certified, CSA Certified, and NEMA Compliant status, supporting safe, regulated installations. By leveraging NRX compatibility and Three-way fixed mounting, it accelerates installation while reducing operating risks and downtime. For maintenance teams, the interlock simplifies compliance audits and parts standardization across assemblies. This proven NRX solution supports scalable upgrades with minimal downtime and predictable service costs. Engineers benefit from clear documentation, straightforward mounting, and field-verified performance.
Product Information
Extended Description
RFMI31F Eaton: Eaton Power Defense ICCB mechanical interlock, Fixed breaker, RF Frame, Three-Way Cable Type 31
Product Name
Eaton Series NRX mechanical interlock
Catalog Number
RFMI31F
UPC
786685703633
Product Length/Depth
9 in
Product Height
2.25 in
Product Width
4.5 in
Product Weight
11 lb
Warranty
One year factory warranty issued from date of shipment from repair center
Compliances
NEMA Compliant
Certifications
UL Listed ANSI CSA Certified
Type
Mechanical interlock kit
Circuit breaker type
Fixed
Frame
RF
Accessories
Mechanical interlock
Mounting Method
Three-way fixed
Series
Series NRX
Feature: Mechanical interlock kit designed for the RF NRX fixed-breaker system. Business Impact: Enables fail-safe operation by preventing breaker removal or movement when contacts are not safely engaged, reducing arc flash exposure and misoperation. Application: Suitable for industrial control panels that use the RF frame with fixed breakers, where safety and process continuity are critical. Feature: Three-way fixed mounting with Three-way Cable Type 31 configuration. Business Impact: Streamlines installation, minimizes wiring errors, and enables consistent interlock engagement across units. Application: Deployment in high-volume panel assemblies and retrofit projects. Feature: Certifications and compliance. Business Impact: UL Listed, ANSI CSA Certified, and NEMA Compliant certifications support regulatory readiness and simpler audits, lowering compliance risk. Application: Industrial facilities operating under UL/CSA/NEMA standards and routine inspections. Feature: Frame compatibility and robustness. Business Impact: RF frame compatibility ensures a reliable fit and long service life, reducing spare parts and field modifications; its 11 lb weight reflects sturdy construction for demanding environments. Application: Vibration-prone facilities and long-term panel installations. Feature: Warranty and service support. Business Impact: One-year factory warranty and dedicated support shorten downtime and improve total cost of ownership. Application: Maintenance planning, replacements, and service contracts in manufacturing environments.
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FAQs
RFMI31F is designed specifically for the Eaton NRX mechanical interlock system within RF-frame fixed breakers. It uses a Three-way fixed mounting arrangement and Three-way Cable Type 31 configuration, ensuring precise interlock engagement. This compatibility minimizes assembly errors while delivering consistent, safe operation across NRX panel applications.
The RFMI31F Interlock Kit carries UL Listed, ANSI Certified, and CSA Certified markings and is NEMA Compliant. These certifications support regulatory compliance, streamline third-party inspections, and reduce project risk in facilities that require formal safety and performance certifications for control panels.
Plan for proper alignment of the RF frame with the fixed breaker, ensuring the Three-way mounting points are securely fastened and the Type 31 cable routing is unobstructed. Verify compatibility with the RF frame dimensions (9 in depth, 4.5 in width, 2.25 in height) and confirm the 11 lb weight for handling and support in your enclosure.
Yes. The RFMI31F’s mechanical interlock design, RF frame compatibility, and robust construction support safe operation in vibration-prone and high-demand environments. Its UL/CSA certifications and NEMA compliance further reinforce suitability for continuous-duty panels, reduced downtime, and safer maintenance activities.
The RFMI31F comes with a one-year factory warranty from the date of shipment from the repair center. Eaton provides post-sale technical support and replacement guidance, helping to minimize downtime and simplify planning for component obsolescence or forthcoming upgrades in NRX installations.