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.

LK-25 BBC/ITE 2500A 600V AC Low Voltage Air Circuit Breaker MO/DO LSG

BBC/ITE LK-25 Brown Boveri AC Low Voltage Power Circuit Breaker; 2500 amp frame, 2500 amp sensors, 600 volt AC. Manually operated, draw-out, Solid State Trip Device Type LSS 4 with LSG functions. Sold Used As Is.
SKU: LK25 EMSCO #20674

LK42 ABB/BBC 4200A 600V EO/DO Air Circuit Breaker LSG

ABB/BBC LK42 Brown Boveri A.C. Low Voltage Power Circuit Breaker; 4200 amp frame, 4200 amp sensors, 600 volt AC. Electrically operated, draw-out, charge: 240 VAC, close: 240 VAC, trip: 240 VDC, Micro-power Shield Type MPS-4G with LSG functions. Used electrically OK.
SKU: LK-42 # 21379

LK42 ITE/BBC 4200A 600V MO/DO Air Circuit Breaker LS

ITE/BBC LK42 Brown Boveri A.C. Low Voltage Power Circuit Breaker; 4200 amp frame, 4200 amp sensors, 600 volt AC. Manual operated, draw-out, Trip Unit Type LSS-4 with LS functions. Used Electrically OK.
SKU: LK-42 # 21392

RL-3200 Siemens Air Breaker 3200A 600V MO/DO LSG

Siemens RL-3200 Air Breaker; 3200 amp, 600 volt. Manually operated, draw-out, Siemens Static Trip III with LSG functions. Used electrically OK.
SKU: RL-3200-MO-DO-LSG-#22349

RL-3200 Siemens 3200A 600V Air Breaker MO/DO LSIG

Siemens RL-3200 Low Voltage Power Circuit Breaker; 3200 amp frame, 600 volt. Static Trip III with LSIG functions. Manually operated, draw-out, 3200 amp CT with cell. Used electrically OK.
SKU: RL3200 EMSCO# 21390

RL-3200 Siemens-Allis 3200A 600V Air Breaker MO/DO LSIG

Siemens-Allis RL-3200 Type RL Low Voltage Power Circuit Breaker; 3200 amp frame, 600 volt. Static Trip II TYPE TSG (3T) LSIG functions. Manually operated, draw-out. 3200/1 CT's. Used Electrically OK.
SKU: RL3200 EMSCO# 20532

RL-1600 Siemens-Allis 1600A 600V Air Breaker MO/DO LSI

Siemens-Allis RL-1600 Type RL Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt, 1600 amp current sensors, 1600 amp Grd. Sensors (when used). Static Trip II Type TSI(2T) LSI functions. Manually operated, draw-out, Type Q-11 Auxiliary Switch 1600:1 CT's** Missing 1 set of spring stabs**. Used Electrically OK.
SKU: RL1600 EMSCO# 20578

RL-1600 Siemens-Allis 1600A 600V Air Breaker MO/DO LIG

Siemens-Allis RL-1600 Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt. Static Trip II Type TIG (3T) LIG functions. Manually operated, draw-out. Used Electrically OK.
SKU: RL-1600 EMSCO# 21344

RL-4000 Siemens 4000A 600V Air Breaker EO/DO LSG

Siemens Type RL Low Voltage Power Circuit Breaker RL-4000; 4000 amp Frame, 600 volt, 4000 amp current sensors. 2000 amp Grd. Sensors (when used), Static Trip III - RMS-TSG-TZ-C LSG functions. Electrically operated, draw-out, Motor Volts: 120 VAC, Close Volts: 120 VAC, Trip Volts: 120 VAC, Type Q-11 Auxiliary Switch 4000/.5 CT's. Used Electrically OK.
SKU: RL4000 EMSCO# 21351

RL-3200 Siemens-Allis 3200A EO/DO Air Breaker LSIG

Siemens-Allis Low Voltage AC Power Circuit Breaker RL-3200; 3200 amp, 600 volt. Electrically operated, draw-out. Gold Face TSG Trip: L-S-I-G. Used Electrically OK.
SKU: RL-3200 #20873

LKD16 ITE/BBC 1600A 600V MO/DO Air Breaker LSIG

ITE/BBC LKD16 Low Voltage Integrally Fused Power Circuit Breaker; 1600 amp, 600 volt. Manually operated, draw-out, trip: MPS-5 with L-S-I-G. Used Electrically OK.
SKU: LKD16 #20909

LKD16 ITE/BBC 1600A 600V MO/DO Air Breaker LSIG

ITE/BBC LKD16 AC Low Voltage Integrally Fused Power Circuit Breaker; 1600 amp, 600 volt. Manually operated, draw-out, trip: MPS-5 with L-S-I-G. Used Electrically OK.
SKU: LKD16 #20910

LKD8 ITE/BBC 800A 600V MO/DO Air Breaker LSG

ITE/BBC LKD8 AC Low Voltage Integrally Fused Power Circuit Breaker; 800 amp, 600 volt. Manually operated, draw-out, trip: LSS4 with L-S-G. Used Electrically OK.
SKU: LKD8 #20905

LKD8 ITE/BBC 800A 600V MO/DO Air Breaker LSG

ITE/BBC LKD8 AC Low Voltage Integrally Fused Power Circuit Breaker; 800 amp, 600 volt. Manually operated, draw-out, trip: LSS4 with L-S-G. Used Electrically OK.
SKU: LKD8 #20906

LKD8 ITE/BBC 800A 600V MO/DO Air Breaker LSG

ITE/BBC LKD8 AC Low Voltage Integrally Fused Power Circuit Breaker; 800 amp, 600 volt. Manually operated, draw-out, trip: LSS4 with L-S-G. Used Electrically OK.
SKU: LKD8 #20907

LKD8 ITE/BBC 800A 600V MO/DO Air Breaker LSG

ITE/BBC LKD8 AC Low Voltage Integrally Fused Power Circuit Breaker; 800 amp, 600 volt. Manually operated, draw-out, Trip: LSS4 with L-S-G. Used Electrically OK.
SKU: LKD8 #20908

LKD8 ITE/BBC 800A 600V MO/DO Air Breaker LSI

ITE/BBC LKD8 AC Low Voltage Integrally Fused Power Circuit Breaker; 800 amp, 600 volt. Manually operated, draw-out, trip: LSS5 with L-S-I. Used Electrically OK.
SKU: LKD8 #20928

LKD8 ITE/BBC 800A 600V Fused Air Circuit Breaker MO/DO LSG

ITE/BBC LKD8 A.C. Low Voltage Integrally Fused Power Circuit Breaker; 800 amp frame, 800 amp sensors, 800 amp fuses (A4BY800), 600 volt AC. Manually operated, draw-out, solid state trip device, Type LSS 4 with LSG functions. Used Electrically OK.
SKU: LKD-8 #20685

LKD8 ITE/BBC 800A 600V Fused Air Circuit Breaker MO/DO LSG

ITE/ BBC LKD8 A.C. Low Voltage Integrally Fused Power Circuit Breaker; 800 amp frame, 800 amp sensors, 800 amp fuses (A4BY800), 600 volt AC. Manually operated, draw-out, solid state trip device, type LSS 4 with LSG functions. Used electrically OK.
SKU: LKD-8 #20686

LKD8 ITE/BBC 800A 600V Fused Air Circuit Breaker MO/DO LSG

ITE/BBC LKD8 A.C. Low Voltage Integrally Fused Power Circuit Breaker; 800 amp frame, 800 amp sensors, 800 amp fuses (A4BY800), 600 volt AC. Manually operated, draw-out, solid state trip device, Type LSS 4 with LSG functions. Used electrically OK.
SKU: LKD-8 #20687

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.