An ACB Panel (Air Circuit Breaker Panel) is a type of electrical distribution panel used for controlling, protecting, and distributing power in low-voltage systems, especially where high current capacity is required.

It houses an Air Circuit Breaker (ACB) as the main switching and protection device, which uses air as the arc extinguishing medium to safely interrupt electrical faults.

Key Functions

·        Protects electrical systems from:

·      Overload

·      Short circuit

·      Earth fault

·      Over/under voltage

·        Acts as main incoming breaker in LT panels

·        Ensures safe and reliable power distribution

·        Provides isolation during maintenance

Main Components

·        Air Circuit Breaker (ACB)

·        Busbars (power distribution)

·        Current Transformers (CTs)

·        Protective Relays

·        Metering & Indication units

·        Control wiring & switches

Technical Features

·        Current range: 800A to 6300A (or higher)

·        Voltage: Up to 690V (LT system)

·        Breaking capacity: Up to 120kA

·        Types:

·              Draw-out type (easy maintenance)

·              Fixed type (cost-effective)

Working Principle

·        Protection system detects abnormal current

·        Trip coil activates

·        ACB opens the circuit

·        Arc formed is extinguished using air inside arc chutes

·        Power supply is safely interrupted

Applications

·        Industrial plants

·        Commercial buildings

·        Power distribution systems

·        Substations & main LT panels

·        Generators and transformers protection