Westinghouse LM3400 Three Phase Circuit Breaker

Description:

The Westinghouse LM3400 Circuit Breaker is used in industrial and commercial electrical distribution systems to provide high-capacity overcurrent and short-circuit protection for three-phase power circuits and electrical equipment. Commonly installed in switchgear assemblies, panelboards, motor control centers, and industrial electrical panels where dependable molded case protection and high interrupting capacity are required. Maintenance teams, electricians, and facility operators use this breaker for replacement of aging protection devices, electrical system upgrades, and preventative maintenance of power distribution infrastructure.

Applications:

The Westinghouse LM3400 circuit breaker is commonly used in manufacturing facilities, commercial buildings, HVAC systems, industrial automation equipment, mining systems, and power distribution applications where reliable 400 amp three-phase circuit protection and dependable fault interruption are critical for safe and continuous electrical operation.

Technical Specifications:

• Brand: Westinghouse
• Part Number: LM3400
• Product Type: Molded Case Circuit Breaker
• Breaker Series: LM
• Number of Poles: 3 Pole
• Current Rating: 400 Amp
• Voltage Rating: 600 Volt AC
• Phase Type: 3 Phase
• Interrupt Rating: 18kA @ 480V AC
• Trip Type: Thermal Magnetic
• Trip Functions: Long-Time and Instantaneous
• Mounting Type: Bolt-On
• Connection Type: Bolt-On
• Application: Commercial and industrial electrical protection systems
• Function: Overcurrent and short-circuit protection
• Compatible Equipment: Switchgear and distribution systems
• Installation Type: Panel mounted
• Usage Environment: Commercial and industrial electrical systems
• Designed For: High-capacity branch circuit and equipment protection applications
• Construction: Molded case circuit breaker

Common Replacements:

• Eaton LM3400
• Cutler-Hammer LM3400
• Square D LA36400