Cutler Hammer-Eaton C321KM30 Mechanical Interlock

Description

The Cutler Hammer-Eaton C321KM30 is a mechanical interlock designed to provide a dependable safety interface between two contactors or motor starters. By physically preventing both devices from engaging at the same time, this interlock is an essential component in reversing motor control circuits and other applications where simultaneous operation would cause equipment damage or unsafe conditions.

Key Features

• Mechanical interlock designed to prevent simultaneous engagement of paired contactors or starters
• Engineered for use with compatible Cutler Hammer-Eaton contactor and starter assemblies
• Provides a positive mechanical barrier — adding a critical layer of safety beyond electrical interlocking alone
• Compact, durable construction built for industrial and commercial HVAC control panel environments
• Simplifies wiring and panel design by integrating safety interlock function directly into the contactor assembly
• Manufactured by Cutler Hammer-Eaton, a trusted name in power management and electrical control components

Common Applications

• Reversing motor starters in HVAC and commercial equipment
• Two-speed motor control circuits
• Transfer switch and changeover contactor assemblies
• Industrial control panels requiring positive interlock safety

Why Choose the C321KM30?

The C321KM30 mechanical interlock from Cutler Hammer-Eaton delivers a straightforward, reliable solution for preventing dangerous simultaneous contactor closure. Whether you are building a new control panel or replacing a worn interlock on an existing assembly, this component ensures your system operates safely and in compliance with motor control best practices. Its robust construction and compatibility with Eaton’s lineup of contactors and starters make it a go-to choice for HVAC technicians and electrical contractors alike.