Air Circuit Breakers

Air Circuit Breaker Test, Repair and Replacements

Bay Power tests, repairs, upgrades, and supplies replacement air circuit breakers (ACBs) for low voltage power distribution systems for all manufacturers, with a strong focus on ABB equipment and support for other major brands. We are an authorized ABB distributor with full factory support. Whether you’re replacing a failed breaker, upgrading an existing lineup, or sourcing spares, we provide ACBs across a wide range of amp ratings and configurations to match your application. We can also help with preventative maintenance schedules to help prevent future failure risk.

In addition to stocking complete breakers, we also have a huge inventory of trip units, rating plugs, and accessories commonly required for maintenance and upgrades. From current production breakers to obsolete and hard-to-find models, our team helps you identify the correct breaker and deliver it quickly to minimize downtime and keep critical systems operational.

Tripped Breaker? Need it recertified? Call Us! 

When a breaker trips, the immediate priority is getting the system running again. However, simply resetting a breaker without testing it can create additional risk. Industry standards suggest the breaker needs to be tested to ensure it's still suitable for service. Bay Power offers circuit breaker testing and diagnostic services that help determine whether the breaker itself failed or if another issue caused the trip event. We can recertify the breaker to ensure it's safe to put back into service. With the ability to test molded case, insulated case, and larger power breakers, contractors can verify equipment performance before putting systems back into service. This capability gives contractors confidence that the equipment they reinstall is operating as intended.

If replacement is necessary, we will provide options and also help with preventative maintenance schedules to help prevent future failure risk. 

What We Do

Bay Power provides full-service support for air circuit breakers across the most widely used platforms in the field, with in-house AVO certified technicians:

• Supply replacement air circuit breakers (new, used, and obsolete)
• Perform in-house testing and diagnostics
• Repair and refurbish existing breakers
• Source hard-to-find and legacy units
• Support retrofit and upgrade projects
• Provide application guidance for switchgear systems

This combination of capabilities allows us to act as both a supplier and technical resource, not just a reseller. 

In-House Testing and Repair Capabilities

Unlike traditional distributors, Bay Power performs all testing and repair work in-house. Our technicians work directly with circuit breakers every day, giving us a practical understanding of how these systems perform, fail, and can be restored.

• All used breakers are fully tested before shipment
• Diagnostic testing helps determine whether failure is breaker-related or system-related
• Repair services are performed by experienced technicians familiar with multiple platforms
• Preventative maintenance support is available to reduce future failures

This hands-on experience allows us to ask the right questions, identify issues faster, and provide more accurate solutions.

Multi-Brand Expertise with Real Inventory

We support all major air circuit breaker manufacturers, with a strong focus on commonly installed platforms across commercial and industrial facilities.

Our inventory is built around real-world demand - particularly older and obsolete equipment that is no longer readily available through OEM channels. This includes a deep stock of breakers and components used in:

• Legacy switchgear systems
• Brownfield installations
• Critical infrastructure environments

Because we maintain extensive on-hand inventory, we are often able to deliver faster than factory-direct options, especially in emergency replacement scenarios. And our in-house expertise sets us apart from the average breaker house operation. 

Air circuit breakers we regularly test/replace/stock

• Both manually and electrically operated breakers, all manufacturers
• ABB Emax 2
• GE AKR, AKD, and EntelliGuard G
• ITE K and K-DON series
• Siemens WL series
• Square D Masterpact NT and NW
• Cutler Hammer Magnum DS
• Westinghouse DSL, DS, DBL, and DB series

Get more information on GE AKR, AKD, and EntelliGuard upgrades and retrofits >> 

ABB Authorized Distributor with Factory Support

As an authorized ABB distributor, Bay Power provides full factory-backed solutions for modern air circuit breaker systems, including:

• New ABB air circuit breakers and components
• OEM-supported upgrades and replacements
• Access to retrofit solutions for legacy systems
• Technical support aligned with current standards

This gives customers a clear path forward when transitioning from obsolete equipment to modern, supported platforms.

Retrofit and Upgrade Solutions

Air circuit breaker replacement is often an opportunity to improve system safety and performance. We support upgrade initiatives that align with current electrical standards and operational requirements.

Key upgrade capabilities include:

• Trip unit and protection system upgrades
• Arc flash reduction (maintenance mode) implementation
• Metering and monitoring enhancements
• Retrofit kits to modernize existing switchgear

For facilities operating breakers 1200A and above, these upgrades are critical for compliance and safety. Bay Power can help scope and support these projects as part of a broader replacement or repair strategy.

Bay Power focuses on practical solutions - whether that’s sourcing a direct replacement, identifying a compatible upgrade, or repairing existing equipment to avoid unnecessary downtime. With in-house expertise, extensive inventory across four warehouses, access to ABB as an authorized distributor for new replacements, and a deep inventory of legacy equipment for used replacements, we help contractors and facilities keep critical systems running without long factory delays.