Air Circuit Breakers

While our website showcases a large assortment of our products, it does not reflect the complete inventory of products currently available. For real-time availability and to ensure we can meet your specific needs, please contact our sales team at 1-800-328-1842. New products arrive daily and our knowledgeable staff are happy to assist you in locating the exact item(s) you need.

100H-3 Federal Pioneer Air Breaker 4000A EO/DO LSIG w/cell

Federal Pioneer 100H-3 air circuit breaker; 4000 amp, electrically operated, draw-out. LSIG with cell #21903, 4000 amps, 600 volts, three poles, 120 VAC USR RMS over current relay LSIG functions, $8500 without cell. Used electrically OK.
SKU: 100H-3-EO/DO-LSIG-Emsco#21903

100H-3 Federal Pioneer 4000A Air Breaker EO/DO LSIG

Federal Pioneer 100H-3 air circuit breaker; 4000 amp, electrically operated, draw-out, LSIG with cell #21904, 4000 amps, 600 volts, three poles, 120 VAC USR RMS over current relay LSIG functions, $8500 without cell. Used electrically OK.
SKU: 100H-3-EO/DO-LSIG-Emsco#21904

100H-3 Federal Pioneer 4000A EO/DO Air Breaker LSIG w/cell

Federal Pioneer 100H-3 air circuit breaker; 4000 amp, LSIG with cell #21905, 4000 amps, 600 volts, three poles, 120 VAC, USR RMS over current relay LSIG functions, $8500 without cell. Electrically operated, draw-out. Used electrically OK.
SKU: 100H-3-EO/DO-LSIG-Emsco#21905

WPS-40 GE WavePro 4000A 600V MVT+ LSIG Air Circuit Breaker MO/DO

General Electric Type WPS-40 WavePro low-voltage power circuit breaker; cat# WE1NAQVXXXAXXXX, 4000 amp frame, 635 volt max, 4000 amp rating plug: TR40B4000 Micro Versa trip plus trip unit with LSG (K440LSIG). Manually operated, draw-out, sold used as-is.
SKU: WPS-40 #19959

WPS-40 GE WavePro 4000A 600V MVT+ LSIG Air Circuit Breaker MO/DO

General Electric Type WPS-40 WavePro low-voltage power circuit breaker; cat# WE1NAQVXXXAXXXX, 4000 amp frame, 635 volt max, 4000 amp, rating plug: TR40B4000, Micro Versa trip plus trip unit with LSG (K440LSIG). Manually operated, draw-out, sold used as-is.
SKU: WPS-40 #19958

AK-1-100-3 GE 4000A 600V EO/STA Air Circuit Breaker

General Electric AK-1-100-3 Air circuit breaker; 4000 amp frame, 600 volt. Electrically operated, closing voltage: 208 volt, operating range: 175-225 volt, fixed mount/stationary series over current tripping device, type EC-1, instantaneous function key interlock. Sold used electrically OK.
SKU: AK-1-100-3 EMSCO #21061

WPS-40 GE WavePro 4000A 600V MVT+ LSG Air Circuit Breaker EO/DO

General Electric Type WPS-40 WavePro low voltage power circuit breaker; cat# WE1NABVF1XBBXDX, 4000 amp frame, 635 volt max, 4000 amp rating plug: TR40B4000, Micro Versa trip Plus trip unit with LSG (K440LSG), Bell Alarm, electrically operated (120 volt), draw-out. Sold used as-is.
SKU: WPS-40 #19623

AK-2-100-3 GE Air Circuit Breaker 600V 4000A EO/DO LI

General Electric AK-2-100-3 low voltage power circuit breaker; 600 volt, 4000 amp. Electrically operated, draw-out, 230 closing volts, EC-1B trip, LI functions. Sold used electrically OK.
SKU: AK-2-100-3-EO-DO-#22925

AK-2-100-3 GE Air Circuit Breaker 4000A 600V EO/DO

General Electric AK-2-100-3 low voltage circuit breaker; 4000 amp, 600 volt. Electrically operated, draw-out, 230 closing volts, EC-1B trip, LSI functions. Sold used electrically OK.
SKU: AK-2-100-3-EO-DO-LSI-#21935

AK-2A-100-1 GE Air Breaker 4000A 600V MO/DO LI

General Electric AK-2A-100-1 low voltage power circuit breaker; 4000 amp, 600 volt. Manually Operated, draw-out, EC-1B trip, LI function. Used E-OK.
SKU: AK-2A-100-1-MO-DO-LI-#22341

AK-2A-100-1 GE Air Breaker 4000A 600V MO/DO LI

General Electric AK-2A-100-1 low voltage power circuit breaker; 4000 amp, 600 volt. Manually Operated, draw-out, EC-1B Trip LI function. Used E-OK.
SKU: AK-2A-100-1-MO-DO-LI-#22342

AK-3A-100 GE 4000A FRAME EO/DO AIR BREAKER POWER SENSOR TRIP LSG

General Electric AK-3A-100 low voltage power circuit breaker; 4000 amp frame. Electrically operated, draw-out, power sensor trip, LSG functions, trip/ closing voltage 120. Used electrically OK.
SKU: AK-3A-100 EMSCO #20827

AK-3A-100 GE 4000A FRAME EO/DO AIR BREAKER POWER SENSOR TRIP LSG

General Electric AK-3A-100 low voltage power circuit breaker; 4000 amp frame. Electrically operated, draw-out, power sensor trip, LSG functions, trip/closing voltage: 120. Used electrically OK.
SKU: AK-3A-100 EMSCO #20828

AK-3A-100 GE Air Breaker 600V 4000A MO/DO LS

General Electric AK-3A-100 low voltage A.C. power circuit breaker; 600 volt, 4000 amp. Manually operated, draw-out, power sensor trip with LS functions. Used electrically OK.
SKU: AK-3A-100-MO-DO-#22927

DB100 Westinghouse Air Breaker 4000A 600V EO/DO LS

Westinghouse DB100 Air Breaker; 4000 amp, 600 volt. Electrically operated, draw-out, over current trip device 4000 amp with LS functions. Used electrically OK.
SKU: DB100-EO-DO-LS-#22346

DS FUSE TRUCK WESTINGHOUSE AIR BREAKER 4000A 600V FRAME DO

Westinghouse DS-4000 fuse truck; 4000 amp frame, 600 volt, draw-out. Sold used as is.
SKU: DS4000 EMSCO#21316

DS-4000 FUSE TRUCK WESTINGHOUSE AIR BREAKER 4000A 600 VOLT AC FRAME DO

Westinghouse DS-4000 fuse truck; 4000 amp frame, 600 volt AC, draw-out. Sold used as is.
SKU: DS4000 #20206

DS-4000 FUSE TRUCK WESTINGHOUSE AIR BREAKER 4000A FRAME 600 VOLT AC DO

Westinghouse DS-4000 fuse truck; 4000 amp frame, 600 volt AC, draw-out. Sold used as is.
SKU: DS4000 #20209

DS4000 Westinghouse Air Breaker 4000A 600VAC Fuse Truck

Westinghouse DS-4000 Fuse Truck; 4000 amp frame, 600 volt AC. Draw-out, blown limiter indicator with 4000 amp fuses. Sold used electrically OK.
SKU: DS4000 #20594

DS840 SQ-D 4000A 600V EO/DO Air Breaker LSI

Square D DS-840 low voltage AC power circuit breaker; 4000 amp, 600 volt. Electrically operated, draw-out, Amptector II with LSI functions. Used electrically OK.
SKU: DS840 #20256

Used and Refurbished Air Circuit Breakers

Air Circuit Breakers (ACB’s) use air to extinguish electrical sparks. When a fault occurs, these circuit breakers disrupt the circuit by releasing a burst of compressed air, extinguishing the arc. This isolates the defective section of the system, preventing damage. High-pressure air cools the electrical arc.

Inventory Selection of Air Circuit Breakers to Match and Replace Yours

Our inventory features a wide range of air circuit breaker types to match and replace your existing electrical equipment seamlessly, ensuring compatibility and optimal performance for different applications. Whether you need a specific voltage rating, current capacity, or unique design, we have options that suit your needs.

New and Refurbished Air Circuit Breakers -- It's Your Choice

We offer customers the flexibility to choose between new and refurbished ACB’s. New circuit breakers ensure the latest technology and warranties, while refurbished breakers provide cost-effective solutions without compromising quality, backed by thorough inspections and testing.

Electrical testing equipment Certifies Quality and Performance

Our products undergo rigorous electrical testing using the newest test equipment to guarantee quality, safety, and optimal performance. Each air circuit breaker is thoroughly inspected, ensuring it meets industry standards and specifications.

Specifications Based on Your Power Requirements

To specify the right air circuit breaker, consider power requirements such as voltage, current rating, breaking capacity, and the type of application. In most cases, air circuit breakers are used where there’s high risk of fire or explosion. Air Breakers are typically used for low voltages up to 15KV.

Our expert team can guide you through selecting the most suitable breaker for your specific power needs.

What Type of Air Circuit Breaker Do You Need?

Air Breaker Type

How the Breaker Type Works

Applications

Plain Break Air Breaker

Utilizes a pair of contacts within a chamber filled with air to interrupt the electrical circuit. When the contacts separate, an arc forms and is extinguished by the surrounding air.

Commonly used in low-voltage applications like residential and commercial settings, protecting against overcurrents and short circuits.

Magnetic Blowout Air Breaker

Uses a magnetic field to drive the arc away from the contacts, ensuring quick interruption and extinguishing of the arc. The magnetic force redirects the arc into a chute, effectively extinguishing it.

Often found in industrial and heavy-duty settings due to their capability to handle high fault currents, making them ideal for heavy machinery and large-scale equipment protection.

Air Chute Breaker

Uses a series of parallel plates to create a chute for the arc. When the contacts open, the arc is diverted into the chute, where it is elongated, cooled, and extinguished before being directed toward the exhaust vent.

Commonly applied in medium-voltage power distribution systems, particularly in substations, to protect transformers and other critical power equipment from faults and overloads.

Air Blast Breaker

Relies on a high-pressure air blast to extinguish the arc. The compressed air directed towards the arc causes rapid cooling and interruption, ensuring efficient breaking of the circuit.

Primarily utilized in high-voltage applications like power stations and critical infrastructure such as data centers and hospitals, offering reliable protection against high fault currents and maintaining system integrity.