Westinghouse 300 Amp AB Trip Unit 2 pole

Description:

The Westinghouse 300 Amp AB Trip Unit, 2 Pole is a thermal magnetic trip unit assembly designed for AB DE-ION molded case circuit breakers used in industrial and commercial electrical distribution systems. Commonly installed in Westinghouse AB series circuit breakers, switchgear assemblies, motor control centers, and power distribution equipment requiring calibrated overcurrent and short-circuit protection. Maintenance electricians, facility engineers, and industrial power technicians use this trip unit for replacement, retrofit, or restoration of legacy breaker protection systems.

Applications:

The Westinghouse 300 Amp AB trip unit is commonly used in industrial and commercial electrical systems to provide thermal-magnetic tripping protection for feeders, branch circuits, and distribution equipment. It is installed in manufacturing facilities, commercial buildings, industrial process systems, and switchgear lineups where dependable breaker trip response and accurate overcurrent protection are required. The unit is specifically designed for compatible AB DE-ION breaker frames and low-voltage power distribution applications.

Technical Specifications:

• Manufacturer: Westinghouse Electric Corporation
• Product Type: Circuit Breaker Trip Unit
• Series Compatibility: AB DE-ION Circuit Breakers
• Pole Configuration: 2-Pole
• Current Rating: 300 Amp
• Trip Technology: Thermal Magnetic
• Function: Overcurrent and short-circuit protection
• Application: Industrial and commercial electrical distribution systems
• System Compatibility: Westinghouse AB / LB / HLB breaker frames
• Mounting Type: Internal breaker-mounted trip assembly
• Installation Type: Replacement breaker trip unit
• Operating Environment: Industrial electrical applications
• Intended Use: Breaker protection calibration and trip control
• Performance Feature: Reliable thermal-magnetic trip response for low-voltage distribution systems

Common Replacements:

• Eaton Series C Trip Unit
• Siemens Sentron Trip Unit
• Schneider Electric PowerPact Trip Unit