WESTINGHOUSE 1490456 INTERLOCK CONTACTOR STARTER

Description:

The Westinghouse 1490456 Interlock Contactor Starter is an electrical interlock accessory designed for use with Westinghouse motor starters and contactors. This interlock assembly prevents two contactors from being energized simultaneously, providing safe and reliable operation in reversing starter and transfer control applications. It is commonly installed in motor control centers, industrial control panels, and automation systems where electrical interlocking is required to prevent conflicting contactor operation. Sources identify the 1490456 as an L-60 electrical interlock for Size 3 and Size 4 contactors.

Applications:

The Westinghouse 1490456 interlock is commonly used in reversing motor starter circuits, conveyor systems, pumps, compressors, material handling equipment, and industrial machinery requiring directional motor control. It is installed between paired contactors to prevent simultaneous energization, helping protect motors and control equipment from electrical and mechanical damage. The interlock is suitable for industrial motor control systems utilizing Westinghouse Size 3 and Size 4 contactors.

Technical Specifications:

• Manufacturer: Westinghouse Electric Corporation
• Part Number: 1490456
• Product Type: Electrical Interlock Assembly
• Series: L-60
• Function: Prevents simultaneous operation of paired contactors
• Interlock Type: Outboard Electrical Interlock
• Compatible Contactor Sizes: Size 3 and Size 4
• Application: Reversing starters and motor control systems
• System Compatibility: Westinghouse contactors and motor starters
• Installation Type: Contactor-mounted accessory
• Control Function: Electrical interlocking and safety protection
• Mounting Configuration: Outboard interlock assembly
• Operating Environment: Industrial and commercial electrical applications
• Intended Use: Motor starter and contactor interlocking
• Performance Feature: Provides safe contactor sequencing and prevents conflicting contactor operation.

Common Replacements:

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