WESTINGHOUSE NB3T400 Circuit Breaker

Description:

The Westinghouse NB3T400 circuit breaker is used in industrial power distribution and electrical protection systems. Commonly installed in switchgear assemblies, motor control centers, manufacturing equipment, and industrial distribution panels. Maintenance teams and system integrators use this circuit breaker for replacement, retrofit projects, preventive maintenance, and heavy-duty electrical system upgrades.

Applications:

The Westinghouse NB3T400 circuit breaker is commonly used in manufacturing facilities, industrial automation systems, HVAC equipment, power distribution systems, and motor control applications where reliable three-phase circuit protection and dependable fault interruption are critical for safe and continuous electrical operation.

Technical Specifications:

• Brand: Westinghouse
• Part Number: NB3T400
• Product Type: Circuit Breaker
• Number of Poles: 3 Pole
• Current Rating: 400 Amp
• Voltage Rating: 600 V
• Protection Type: Thermal Magnetic Circuit Protection
• Trip Unit Type: Thermal Magnetic Trip
• Frame Type: Molded Case Circuit Breaker
• Mounting Type: Fixed Mount
• Frequency Rating: 50/60 Hz
• Phase Type: Three Phase
• Application: Power Distribution and Motor Protection
• Industrial Duty Rated: Yes
• Compatible Installations: Switchgear, MCCs, and Distribution Panels
• Terminal Type: Mechanical Lug Connections

Common Replacements:

• Eaton NB3400T
• Square D PJF36400CU44A
• Siemens HND36400