Eaton Cutler-Hammer C321KM30 Mechanical Interlock 322838-753 ensuring the hydronic heating system

ensuring the hydronic heating system operates within the manufacturer's specified thermal parameters without nuisance lockouts

Simplified Installation: Features a snap-on clip mechanism that securely grips shaft grooves for a non-slip connection

as well as several third-party electronic drivers that support 4-pin M12 electrical connections

Common indicators include a furnace that cycles through the startup sequence without the burners lighting

Eaton Cutler-Hammer C321KM30 Mechanical Interlock 322838-753 ensuring the hydronic heating systemThe Eaton Cutler Hammer C321KM30 Mechanical Interlock is a critical field installable accessory designed for Freedom Series NEMA size 00, 0, 1, and 2 starters and contactors. Engineered for horizontal mounting configurations, this heavy duty mechanical link ensures positive electrical isolation by preventing two opposing contactors from closing simultaneously. This hardware is essential for reversing motor applications and multi source power transfers