Multipart coupler for retrofit of microgrid interconnection device (MID)

The multipart coupler system addresses the heat management challenge of retrofitting MIDs in meter breakers by structurally supporting and conducting heat away from electrical joints, ensuring compliance with UL 67 temperature limits.

CA3299336A1Pending Publication Date: 2026-09-21EATON INTELLIGENT POWER LTD
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Patent Information

Application Number
CA3299336
Authority / Receiving Office
CA · CA
Patent Type
Applications
Current Assignee / Owner
Priority Date
2025-02-28
Filing Date
2026-01-21
Publication Date
2026-09-21

AI Technical Summary

Technical Problem

Retrofitting a microgrid interconnection device (MID) into an existing meter breaker increases heat in the meter breaker, violating UL 67 temperature limits due to space constraints and lack of suitable thermal management solutions.

Method used

A multipart coupler system comprising three individual couplers and an alignment template that provides structural support and conducts heat away from electrical joints, including a main L1 coupler, main L2 coupler, and load L1/L2 coupler, each with heat conduction paths to the meter breaker housing.

Benefits of technology

Effectively manages heat generated by the MID, ensuring temperature compliance with UL 67 standards by dissipating heat through multiple thermal conduction paths to the meter breaker housing, thus maintaining safety and functionality.

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Abstract

A multipart coupler provides structural support and thermal management for the retrofit installation of a microgrid interconnection device (MID) in a meter breaker. The multipart coupler forms paths that conduct heat from the electrical joints between the MID and meter breaker to the meter breaker housing, and includes three individual couplers: a Line1 (L1) coupler connecting the MID to the meter breaker grid side L1 main terminal, a Line2 (L2) coupler connecting the MID to the meter breaker grid side L2 main terminal, and a load L1 / L2 coupler for connecting the MID L1 and L2 load sides to the meter breaker branch bus. Each coupler gets installed in the meter breaker separately from the other two couplers. Next, an alignment template formed based on the MID structure is seated onto all three individual couplers, thus forming the complete multipart coupler. Last, the MID gets seated onto the complete multipart coupler.
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