Eaton Cutler Hammer NG3900 900A 3P Molded Case Generator Circuit Breaker – Bolt-On – 600VAC

The Eaton NG3900 is a high-capacity molded case generator circuit breaker designed for precise protection of generators and industrial power systems. Featuring an NG frame style with an electronic interchangeable trip unit, it offers a 1250–5000A adjustable trip range, providing reliable protection against overloads and short circuits. This model comes with standard terminals and robust interrupting ratings across multiple voltages, ensuring safe and dependable operation in demanding electrical applications.

Product Specifications

• Manufacturer: Eaton / Cutler Hammer
• Frame Type: NG
• Breaker Type: Molded Case Generator Circuit Breaker
• Trip Unit: Electronic Interchangeable
• Trip Range: 1250–5000A
• Amperage: 900A at 40°C
• Poles: 3
• Mounting Type: Bolt-On
• Standard Lug Type: With Terminals Standard

Technical Specifications

• Interchangeable electronic trip unit for flexible protection
• Adjustable thermal-magnetic trip settings
• Suitable for generator and industrial applications
• Supports accessory installation at no additional cost
• One-year manufacturer warranty

Voltage and Ratings

• Voltage: 600VAC
• Frequency: 50/60 Hz
• Interrupting Ratings: 18 kA @ 240VAC, 14 kA @ 480VAC, 10 kA @ 600VAC
• Rated Current: 900A at 40°C

Product Data

• Series: NG Frame
• Poles: 3
• Mounting: Bolt-On
• Typical Applications: Generator protection, industrial switchgear, power distribution systems

Important Note

This product image represents a base model for identification purposes only. If purchasing accessories with the breaker, Eaton will install them according to your specific configuration requirements at no additional cost. Please provide all necessary instructions in the order comment box during checkout to ensure proper installation and compatibility.

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You may return items within 10 days of delivery for a refund.

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