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.

RLF-800 Siemens-Allis 800A Frame 600A Rated 600V Fused EO/DO Air Breaker LSIG

Siemens-Allis Low Voltage Power Circuit Breaker Type RLF-800; 800 amp frame, 600 volt. Digitrip RMS/R 800 #RH86CLSIG with LSIG functions, 600 amp rating plug #PR6A08A060. Electrically operated, draw-out, Motor Volts: 120 VAC, Close Volts: 120 VAC, Trip Volts: 120 VAC, type Q-11 Auxiliary Switch Potential Transformer Module #PRTAPTM, 400/800:5 amp CT's, 600 amp fuses. Used Electrically OK.
SKU: RLF800 #20538

RLF800 Siemens-Allis 800A Frame/600A Rating Plug Fused Air Breaker EO/DO LSIG

Siemens-Allis RLF800 AC fused low voltage power circuit breaker; 800 amp frame, 600 amp rating plug (#PR6A08A060). Electrically operated, draw-out, motor volts: 120 VAC, close volts: 120 VAC, trip volts: 120 VAC. Digitrip RMS/R 800, trip unit #RH86CLSIG (LSIG functions), potential transformer module #PRTAPTM, type #Q-11 auxiliary switch 400/800:5 amp C.T.'s. Used electrically OK.
SKU: RLF800 EMSCO #21284

RLX-800 Siemens 800A 600V Air Breaker MO/DO

Siemens low voltage AC power circuit breaker; type RL RLX-800 gold, 800 amp frame, 600 volt, no trip unit, manually operated, draw-out, 800/1 CT's, used electrically OK.
SKU: RLX-800 EMSCO# 21229

RLX-800 Siemens 800A 600V Air Breaker MO/DO LSIG

Siemens type RL low voltage AC power circuit breaker; RLX-800 800 amp frame, 600 volt static trip III, type RMS-TSIG-TZ, LSIG functions, manually operated, draw-out, 800/.5 CT's, used electrically OK.
SKU: RLX-800 EMSCO# 20712

RLX-800 Siemens-Allis 800A 600V Air Breaker MO/DO LIG

Siemens-Allis RLX-800 Low Voltage AC Power Circuit Breaker; Type RL, 800 amp frame, 600 volt. Static trip II Type TIG (3T) LIG functions. Manually operated, draw-out, 800/1 CT's. Used Electrically OK.
SKU: RLX-800 EMSCO# 20531

RLX-800 Siemens-Allis 800A 600V Air Breaker MO/DO LIG

Siemens-Allis type RLX low voltage AC power circuit breaker; RLX-800 800 amp frame, 600 volt static trip II, type TIG (3T), LIG functions, manually operated, draw-out, 800/1 CT's. Used electrically OK.
SKU: RLX-800 EMSCO# 21343

Siemens RLX-800 600V 800A Air Breaker MO/DO

Siemens RLX-800 low voltage AC power circuit breaker; 600 volt, 800 amp. Manually operated, draw-out (No Trip Unit). Used Electrically OK.
SKU: RLX-800 Emsco#22684

Square D DS-632 3200A 635V RMS500 Air Breaker - Electrically Operated/Draw-Out, LS Functions

Square D DS-632 low voltage AC power circuit breaker; 3200 amp frame, 635 volt max. Electrically operated, draw-out, Digitrip RMS500 trip unit #T53CLS (LS functions), 3200 amp rating plug #PD6D32A320, 120 volt AC-shunt trip-spring release-motor circuit. Sold used as is.
SKU: DS632 EMSCO#20267

Used ABB 15GHK500 Power Circuit Breaker - 13.8 KV Rated Voltage | EMSCO

For sale is a used ABB 15GHK500 Power Circuit Breaker, which is electrically operated and draw-out. The breaker has a rated voltage of 13.8 KV and a maximum voltage of 15 KV, with an impulse voltage of 125 KV. It operates at a frequency of 60 Hz and has a rated continuous current of 1200 A, with a K-Factor of 1.3. The breaker is rated for symmetrical short-circuit KA of 19.2 and an asymmetrical rating factor of 1.2. Its control voltage for charging is 240 VAC, for closing is 240 VAC, and for tripping is 250 VDC. The rated interruption time for the breaker is 3 cycles. Please note that this breaker is sold as-is.
SKU: 15GHK500 #19621

V5D3153Y000 A SQ D VR 1200 AMP 5KV EO/DO Air Circuit Breaker

Square D #V5D3153Y000 A medium voltage circuit breaker; type VR, 12000 amp, 4.76 KV (4760 volt) rated. Electrically operated, draw-out, closing coil: 104-127 VAC, 6.8 amp, tripping coil: 70-140 VDC, 0.7 amp in outdoor house, used electrically OK.
SKU: V5D3153Y000 #22155

VB 13.8-750 G.E. 15KV 1200A EO/DO Air Circuit Breaker

General Electric VB 13.8-750 Power VAC circuit breaker; 1200 amp, 15 KV rated, electrically operated, draw-out, close coil: 250 VAC, trip coil: 250 VDC, Mech type: ML-17, date: 11/77, used as is.
SKU: VB 13.8-750-EMSCO #19567

VB 13.8-750-1 G.E. 15KV 1200A EO/DO Air Circuit Breaker

General Electric VB 13.8-750-1 Power Vac circuit breaker; 1200 amp, 15 KV rated, electrically operated, draw-out. Close coil: 230 VAC trip coil: 325 VDC, mech type: ML-17, used as is.
SKU: VB 13.8-750-1-EMSCO #19564

VB 4.16-250-1 G.E. 5KV 1200A EO/DO Air Circuit Breaker

General Electric VB 4.16-250-1 Power VAC circuit breaker; 1200 amp, 5 KV rated, electrically operated, draw-out. Close coil: 230 VAC, trip coil: 325 VDC, Mech type: ML-17. Used as is.
SKU: VB 4.16-250-1-EMSCO #19568

VB1 4.16-250-2 G.E. 5KV 1200A EO/DO Air Circuit Breaker

General Electric VB1 4.16-250-2 Power VAC circuit breaker; 1200 amp, 5 KV rated, electrically operated, draw-out. Close coil: 125 VDC, trip coil: 125 volt DC, mech type: ML-18. Used as is.
SKU: VB1 4.16-250-2-EMSCO #19583

VB1 4.16-250-2 G.E. 5KV 1200A EO/DO Air Circuit Breaker

General Electric VB1 4.16-250-2 Power VAC circuit breaker; 1200 amp, 5 KV rated, electrically operated, draw-out. Close coil: 125 VDC, trip coil: 125 VDC, mech type: ML-18. Used as is.
SKU: VB1 4.16-250-2-EMSCO #19585

VB1 4.16-250-2 G.E. 5KV 1200A EO/DO Air Circuit Breaker

General Electric VB1 4.16-250-2; Power VAC circuit breaker; 1200 amp, 5 KV rated, electrically operated, draw-out. Close coil: 125 VDC, trip coil: 125 VDC, mech type: ML-18 *. Note: partially broken orange phenolic piece *
SKU: VB1 4.16-250-2-EMSCO #19586

VB1 4.16-250-2 G.E. 5KV 1200A EO/DO Air Circuit Breaker

General Electric VB1 4.16-250-2 Power VAC circuit breaker; 1200 amp, 5 KV rated, electric operated, draw-out. Close coil: 48 VDC, trip coil: 48 volt DC, mech type: ML-18, date: 12/92. Used as is.
SKU: VB1 4.16-250-2-EMSCO #19589

VB1 4.16-250-2 G.E. 5KV 1200A EO/DO Air Circuit Breaker

General Electric VB1 4.16-250-2 Power VAC circuit breaker; 1200 amp, 5 KV rated, electrically operated, draw-out. Close coil: 48 VDC, trip coil: 48 volt DC, mech type: ML-18, date: 12/92. Used as is.
SKU: VB1 4.16-250-2-EMSCO #19591

VB1 4.16-250-2 G.E. 5KV 1200A EO/DO Air Circuit Breaker

General Electric VB1 4.16-250-2 Power VAC circuit breaker; 1200 amp, 5 KV rated, electrically operated, draw-out. Close coil: 48 VDC, trip coil: 48 VDC, mech type: ML-18, date: 12/92. Used as is.
SKU: VB1 4.16-250-2-EMSCO #19592

VB-13.8-750-3 General Electric 15KV 1200A EO/DO Air Circuit Breaker

General Electric VB-13.8-750-3 power VAC circuit breaker; 1200 amp, 15 KV, three pole, control: 125 volt DC, electrically operated, draw-out. Sold used as is.
SKU: VB-13.8-750-3 - EMSCO # 19554

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.