Ls Electric 83411634001 Interlock Unit MC-9B to MC-150A

Product Description

The LS ELECTRIC 83411634001 is a mechanical interlock unit designed to prevent simultaneous engagement of two contactors in a circuit. Also identified by the alternate part number UR-02, this accessory mounts between paired contactors to enforce electrical and mechanical exclusion — a critical safety function in reversing starter and transfer switch applications. Licensed electricians and controls technicians install this type of interlock during panel assembly or field wiring of motor control circuits. The unit weighs 0.5 pounds and carries a 2-year manufacturer warranty.

This interlock unit is suited for use in motor control centers, reversing motor starter assemblies, and industrial control panels where two contactors must be prevented from closing at the same time. It is compatible with the Metasol contactor series, specifically rated for use with MC-9B through MC-150A and MC-6aR through MC-150aR frame contactors. Typical applications include three-phase motor reversing circuits in commercial and industrial installations.

Key Features

• Mechanical interlock prevents simultaneous contactor engagement, reducing risk of phase-to-phase faults
• Compatible with Metasol MC-9B through MC-150A and MC-6aR through MC-150aR contactors
• Alternate part number UR-02 for cross-reference ordering
• 2-year manufacturer warranty
• Lightweight at 0.5 pounds for easy panel integration

Compatibility

Rated for use with LS ELECTRIC Metasol series contactors MC-9B through MC-150A and MC-6aR through MC-150aR. Cross-references as alternate part number UR-02.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements for motor control circuits. De-energize and lock out the panel before mounting the interlock between contactor pairs. Verify that both contactors are of compatible frame sizes before securing the interlock assembly. Do not attempt to override or bypass the mechanical interlock mechanism.