Westinghouse LB3400NW Molded Case Circuit Breaker

Description:

The Westinghouse LB3400NW Circuit Breaker is a non-automatic molded case switch used in industrial and commercial electrical distribution systems for manual switching and circuit isolation of high-capacity three-phase power circuits. Commonly installed in switchgear assemblies, motor control centers, industrial machinery, and commercial electrical panels where dependable bolt-on mounting and non-automatic switching functionality are required. Maintenance teams, electricians, and facility operators use this breaker for equipment disconnect applications, power isolation, and replacement of aging switching hardware.

Applications:

The Westinghouse LB3400NW circuit breaker is commonly used in manufacturing facilities, industrial automation systems, HVAC equipment, large motor applications, and power distribution systems where reliable 400 amp three-phase switching and dependable circuit isolation are critical for safe and continuous electrical operation.

Technical Specifications:

• Brand: Westinghouse
• Part Number: LB3400NW
• Product Type: Non-Automatic Molded Case Circuit Breaker / Switch
• Breaker Series: LB / AB DE-ION
• Number of Poles: 3 Pole
• Current Rating: 400 Amp
• Voltage Rating: 600 Volt AC
• Interrupt Rating: 30kA @ 480V
• Phase Type: 3 Phase
• Protection Type: Non-Automatic
• Function Code: NA – No Overcurrent Protection
• Mounting Type: Bolt-On
• Connection Type: Bolt-On
• Trip Unit: High Magnetic Non-Interchangeable
• Application: Commercial and industrial electrical distribution systems
• Function: Manual power switching and circuit isolation
• Compatible Equipment: Switchgear and distribution systems
• Installation Type: Panel mounted
• Usage Environment: Commercial and industrial electrical systems
• Designed For: High-capacity power distribution and disconnect applications
• Construction: Molded case breaker assembly 

Common Replacements:

• Eaton LB3400NW
• Cutler-Hammer LB3400NW
• Square D LA36400NS