DC Air Circuit Breaker (ACB Breaker) DC Electrical Components Manufacturer

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ACB Circuit Breaker

ACB Circuit Breaker

ELEHUB’s ACB Circuit Breakers deliver high-performance protection for medium and low-voltage systems, safeguarding against overloads, short circuits, and ground faults. Engineered for reliability and longevity, these breakers are ideal for industrial and commercial applications. ELEHUB’s ACBs ensure seamless operation, compliance with global standards, and enhanced safety for critical power systems.

Types of ACB Circuit Breakers in ELEHUB

2000A 400/690V Drawer out type Air Circuit Breaker

3200A 690V Fixed type Air Circuit Breaker

EHW5DC-2500 DC800V 2500A 3P Fixed-type ACB Circuit Breaker — ACB 2000A DC1000V Air Circuit Breaker

EHW5DC-4000 4000A DC1500V ACB Drawout-Type Universal Circuit Breaker

What is ACB circuit breaker?

An Air Circuit Breaker (ACB) is a type of electrical protection device used to interrupt the flow of current in high-voltage circuits. It is designed to protect electrical equipment from damage caused by overloads, short circuits, and other electrical faults. ACBs are typically used in low and medium-voltage applications, ranging from 800A to 4,000A.

The key characteristic of an ACB is that it uses air as the medium to extinguish the electrical arc that forms when the breaker interrupts the circuit. When a fault is detected, the breaker opens its contacts, creating an arc. The air around the contacts, aided by arc chutes or blowout coils, cools and stretches the arc until it is extinguished, thereby stopping the current flow.

ACBs are commonly used in industrial and commercial settings, such as power plants, manufacturing facilities, and large commercial buildings, due to their reliability and ability to handle high currents. They offer adjustable trip settings, making them suitable for protecting various electrical systems. ACBs are favored for their ease of maintenance and ability to handle both overloads and short-circuit protection.

ACB Circuit Breaker Working Principle

An Air Circuit Breaker (ACB) operates by interrupting high-current flow in electrical systems, typically between 800A to 4,000A, using air as the medium to extinguish the arc when a fault occurs. The ACB’s working principle relies on detecting overcurrent or short circuits and breaking the circuit to prevent damage.

Here’s how it works:

Normal Operation: Under regular conditions, the ACB allows current to flow through its contacts, maintaining the electrical circuit.
Fault Detection: When the current exceeds a pre-set limit, such as during an overload or short circuit, the breaker’s trip unit senses the fault. Modern ACBs use electronic sensors or electromechanical devices to detect these irregularities.
Arc Formation: Upon detecting the fault, the breaker opens its contacts, but this sudden interruption creates an electrical arc. The arc can be dangerous due to the high temperatures it generates.
Arc Extinguishing: The ACB uses air as an arc-extinguishing medium. Arc chutes, positioned near the contacts, elongate and cool the arc, eventually extinguishing it.
Circuit Interruption: Once the arc is extinguished, the current flow is halted, protecting the system from further damage.

ACBs are widely used in industrial and commercial settings for reliable circuit protection, particularly in high-voltage applications.