Westinghouse Electric 1373D96G20 Magnetic Trip Unit

Description:

The Westinghouse 1373D96G20 is a magnetic-only interchangeable trip unit designed for use with Westinghouse LA and HLA frame molded case circuit breakers. This trip unit provides instantaneous magnetic protection against short-circuit and high-fault-current conditions without thermal overload protection. It is commonly installed in industrial power distribution systems, motor circuits, feeder applications, and specialized protection systems where magnetic-only trip characteristics are required. The trip unit is adjustable within a range of 625 to 1250 Amps and is intended for use with 400 Amp LA/HLA breaker frames.

Applications:

The Westinghouse 1373D96G20 magnetic-only trip unit is commonly used in motor protection systems, feeder circuits, industrial machinery, switchgear, and power distribution equipment where instantaneous short-circuit protection is required. It is installed in manufacturing facilities, processing plants, utility systems, and commercial electrical installations utilizing LA and HLA frame circuit breakers. Magnetic-only trip units are often used where overload protection is provided separately by motor overload relays or coordinated protection systems.

Technical Specifications:

• Manufacturer: Westinghouse Electric Corporation
• Part Number: 1373D96G20
• Product Type: Magnetic-Only Trip Unit
• Series Compatibility: LA / HLA Frame Circuit Breakers
• Frame Rating Compatibility: 400 Amp Frame
• Trip Adjustment Range: 625–1250 Amps
• Protection Type: Instantaneous Magnetic Trip Only
• Voltage Rating Compatibility: Up to 600 VAC
• Pole Compatibility: 3-Pole Circuit Breakers
• Mounting Type: Interchangeable Trip Unit
• Function: Short-circuit and fault-current protection
• Application: Industrial and commercial power distribution systems
• System Compatibility: Westinghouse LA and HLA molded case circuit breakers
• Installation Type: Internal breaker-mounted trip unit
• Operating Environment: Industrial and commercial electrical applications
• Intended Use: Feeder, motor, and equipment fault protection
• Performance Feature: Adjustable magnetic-only protection for fast fault-current interruption.

Common Replacements:

• Eaton LA/HLA Magnetic Trip Unit
• Cutler-Hammer LA Frame Magnetic-Only Trip Unit
• Eaton Series C Adjustable Magnetic Trip Unit