ACB installed in low voltage switchgear cabinet

How Does an Air Circuit Breaker Work?

An air circuit breaker detects faults, trips automatically, extinguishes arcs, and safely interrupts circuits to protect equipment. Under normal operating conditions, the contacts remain closed, allowing current to flow smoothly through the air circuit breaker and continuously supply power to the load. When circuit faults—such as overloads or short circuits—occur, causing the current or voltage…

Drawer-type intelligent circuit breaker installed in cabinet

What Is an Air Circuit Breaker?

An Air circuit breaker typically utilizes a steel frame as its primary structural support, serving to securely and cohesively mount all internal components; this design results in a compact yet robust structure. As a low-voltage switching device, the air circuit breaker employs air as both its arc-extinguishing and insulating medium and is primarily deployed within…