Westinghouse Electric FB4015L Circuit Breaker

Description:

The Westinghouse FB4015L Circuit Breaker is used in industrial power distribution systems to provide overload and short-circuit protection for low-voltage electrical circuits. Commonly installed in switchgear assemblies, motor control centers, industrial control panels, and power distribution equipment where reliable interruption of fault currents is required to protect downstream electrical components and connected loads. Maintenance teams, OEM engineers, and system integrators use the FB4015L for equipment repair, panel upgrades, retrofit projects, and replacement of existing molded-case circuit breakers in legacy Westinghouse electrical systems.

Applications:

The Westinghouse FB4015L circuit breaker is commonly used in industrial and commercial electrical systems including motor control circuits, feeder protection panels, manufacturing equipment, HVAC distribution systems, and facility power distribution networks operating at up to 600 VAC where dependable circuit interruption and equipment protection are required.

Technical Specifications:

• Manufacturer: Westinghouse (Cutler-Hammer / Eaton legacy series)
• Model / Part number: FB4015L
• Product type: Molded Case Circuit Breaker (MCCB)
• Voltage rating: 600 VAC
• Frame series: FB frame
• Function: Overload and short-circuit protection
• Trip type: Thermal-magnetic (typical FB series design)
• Mounting: Panel-mounted / fixed installation
• Poles: Configuration dependent (FB series variations available)
• Interrupting capacity: Industrial-grade fault interruption (FB series rated, varies by configuration)
• Application category: Industrial power distribution and motor protection systems

Common Replacements:

• Eaton FB4015L equivalent FB-frame replacement breaker
• Cutler-Hammer FB4015 series circuit breaker (same frame family)
• Siemens 3VL series MCCB 600V class equivalent rated breaker