Westinghouse | NB3700 | Circuit Breaker | 700A | 3-Pole | 600V | 30kA | Bolt-On

Meet the Westinghouse NB3700 Circuit Breaker — a robust 700A, 3-pole protective device designed for demanding electrical environments. With a 600V rating and a 30kA interrupting capacity, this bolt-on breaker delivers reliable, high-capacity protection for large feeders and motor circuits while simplifying retrofit and replacement tasks.

Key specifications at a glance

• Amperage: 700A
• Poles: 3-Pole
• Voltage: 600V
• Interrupting capacity: 30kA
• Mounting style: Bolt-On
• Part number: NB3700
• Brand: Westinghouse

Why this NB3700 model stands out

Designed to fit into the same form factor and panel architecture as other NB3700-series breakers, this unit offers dependable protection for high-energy circuits without sacrificing installation simplicity. The bolt-on design provides a secure, vibration-resistant mount, making it a favorite for retrofit projects and replacements where space and mounting integrity matter most.

Ideal use cases

• Maintenance and replacement in 600V electrical panels serving large motors, feeders, and industrial equipment
• Retrofit projects where exact NB3700 specifications are required to maintain panel listing and compatibility
• Situations demanding high interrupting capacity (30kA) to safely isolate fault currents

Installation, compatibility, and safety considerations

Notes for a smooth, compliant swap:

• Compatibility: Confirm fit and ratings before ordering; the NB3700 part number is the best reference for compatibility with your panel.
• Installation: Use qualified electrical personnel to perform bolt-on mounting, wiring, and torque according to the panel manufacturer’s specifications and safety standards.
• Application: Ideal for maintenance, retrofit, and replacement scenarios where the system requires a 700A, 3-pole, 600V device with strong fault isolation capability.

For projects that demand precise matching of components and durable protection, the Westinghouse NB3700 700A 3-Pole Bolt-On Circuit Breaker provides the trusted performance you rely on in demanding electrical systems.