WESTINGHOUSE 1490460 INTERLOCK CONTACTOR STARTER

Description:

The Westinghouse 1490460 L-60 is an inboard electrical interlock assembly designed for use with Westinghouse contactors and motor starters. This interlock prevents two contactors from being energized simultaneously, providing safe operation in reversing starter, transfer control, and motor control applications. It is commonly installed in motor control centers, industrial control panels, and automation systems where interlocking is required to prevent conflicting contactor operation. The 1490460 is specifically identified as a Type Inboard L-60 interlock assembly for Size 3 and Size 4 contactors.

Applications:

The Westinghouse 1490460 L-60 interlock is commonly used in reversing motor starter circuits, conveyors, pumps, compressors, hoists, fans, and industrial machinery requiring forward/reverse motor control. It is mounted between paired contactors to prevent simultaneous closure, helping protect motors, starters, and electrical equipment from damage caused by opposing contactor operation. The interlock is suitable for industrial motor control systems utilizing compatible Westinghouse Size 3 and Size 4 contactors and line starters.

Technical Specifications:

• Manufacturer: Westinghouse Electric Corporation
• Part Number: 1490460
• Series: L-60
• Product Type: Contactor / Starter Interlock Assembly
• Interlock Type: Inboard Electrical Interlock
• Compatible Contactor Sizes: Size 3 and Size 4
• Function: Prevents simultaneous operation of paired contactors
• Application: Reversing starters and motor control systems
• System Compatibility: Westinghouse contactors and line starters
• Installation Type: Contactor-mounted accessory
• Control Function: Electrical interlocking and safety protection
• Mounting Configuration: Inboard assembly design
• Operating Environment: Industrial and commercial electrical applications
• Intended Use: Motor starter and contactor interlocking
• Status: Discontinued manufacturer part commonly available through surplus and aftermarket suppliers
• Weight: Approximately 0.27 lbs (0.12 kg)

Common Replacements:

• Eaton L-60 Electrical Interlock Assembly
• Cutler-Hammer Size 3–4 Contactor Interlock Kit
• Siemens Reversing Contactor Interlock Assembly