Westinghouse 1490412 Electric Interlock Assembly

Description:

The Westinghouse 1490412 L-60 Electric Interlock is an electrical interlock assembly designed for use with Westinghouse contactors and motor starters. This device prevents two contactors from being energized simultaneously, providing safe and reliable operation in reversing starter, transfer control, and motor control applications. Rated for operation up to 600 VAC, the L-60 interlock is commonly installed in motor control centers, industrial control panels, and automation systems where electrical interlocking is required to prevent conflicting contactor operation. The assembly is identified by part numbers 1490412 and 28005304BCD.

Applications:

The Westinghouse 1490412 L-60 Electric Interlock is commonly used in reversing motor starters, conveyor systems, pumps, compressors, hoists, fans, and industrial machinery requiring forward/reverse motor control. It is installed between paired contactors to prevent simultaneous closure, helping protect motors, starters, and electrical equipment from damage caused by opposing contactor operation. The interlock is designed for use with Size 3 and Size 4 contactors and motor starter assemblies.

Technical Specifications:

• Manufacturer: Westinghouse Electric Corporation
• Part Number: 1490412
• Alternate Number: 28005304BCD
• Series: L-60
• Product Type: Electrical Interlock Assembly
• Interlock Type: Contactor / Starter Interlock
• Voltage Rating: 600 VAC
• 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 motor starters
• Installation Type: Contactor-mounted accessory
• Control Function: Electrical interlocking and safety protection
• Mounting Configuration: Inboard 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 in reversing motor control circuits.

Common Replacements:

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