China Air Circuit Breaker Manufacturers, Suppliers, Factory

The Air Circuit Breaker (ACB) is an electrical switching device designed to protect electrical circuits from excessive current, overloads, and short circuits. It is widely used in medium to high voltage applications, including industrial and commercial settings.

Here are some key features and characteristics of Air Circuit Breakers:

Current Rating: ACBs are available in various current ratings, ranging from a few hundred Amperes to several thousand Amperes. The current rating determines the maximum amount of current the breaker can handle without tripping.

Tripping Mechanism: ACBs incorporate a tripping mechanism that detects abnormal current flow and initiates the opening of the breaker contacts. This mechanism can be based on thermal, magnetic, or a combination of both principles.

Arc Interruption: When the ACB opens the contacts, an arc is formed due to the electrical discharge. The ACB is designed to quickly extinguish this arc to prevent damage to the contacts and surrounding equipment. Different techniques are employed for arc interruption, such as using an air blast, magnetic blowout, or arc chutes.

Protection Features: ACBs offer various protection features to safeguard electrical circuits. These can include adjustable trip settings for precise current protection, thermal and magnetic overload protection, short circuit protection, and ground fault protection.

Control and Monitoring: ACBs are equipped with control and monitoring capabilities to enhance their functionality. They may have built-in protective relays for fault detection, communication interfaces for remote monitoring and control, and features like adjustable time delays and current waveform analysis.

Mechanical and Electrical Endurance: ACBs are designed to withstand mechanical and electrical stresses. They should be capable of withstanding short-circuit currents and have a long lifespan to ensure reliable operation.

Selectivity: ACBs can be coordinated with other protective devices in a power distribution system to achieve selectivity. Selectivity allows only the nearest upstream breaker to trip during a fault, isolating the faulty portion while minimizing downtime and maintaining power to unaffected areas.

Air Circuit Breakers provide efficient and reliable protection for electrical systems against various electrical faults. They are commonly used in electrical distribution boards, power distribution centers, motor control centers, and other applications where high current ratings are required.