Air Circuit Breaker (ACB) is a type of circuit breaker that uses air as the arc extinguishing medium. It is designed to protect electrical circuits from overload, short circuit, and fault conditions by automatically interrupting the current flow. Widely applied in industrial, commercial, and power distribution systems, it is especially suitable for low-voltage applications requiring high reliability, easy maintenance, and safe operation.
Our Air Circuit Breakers Types
Air Circuit Breaker Design & Customization Options
We provide flexible and advanced ACB solutions tailored to different electrical systems and project requirements.
Drawout Design for Easy Maintenance
Allows quick replacement and maintenance without system downtime.
Smart Monitoring & Communication
Supports integration with SCADA and intelligent power management systems.
Accessory Integration
- Auxiliary contacts
- Shunt trip
- Undervoltage release
- Remote control modules
Custom Protection Settings
Adjustable parameters for precise system coordination and protection.
How to Choose the Right Air Circuit Breaker
Selecting the correct ACB is critical for ensuring safety and performance in high-current systems.
- Rated Current Selection
Choose based on system load and capacity.
- Breaking Capacity
Ensure compatibility with maximum fault current levels.
- Type Selection (Fixed vs Drawout)
Based on maintenance requirements and system design.
- Trip Unit Selection
Electronic trip units for advanced protection and monitoring.
- Integration Requirements
Compatibility with automation and power management systems.
Why Choose Our Air Circuit Breakers
Years of Manufacturing Experience
Custom Engineering
In-house Engineering Team
Strict Quality Control
Global Export Projects
Fast Lead Time
Technical Specifications of Air Circuit Breakers
Our ACBs are designed for high performance, reliability, and safe operation in high-current systems.
Electrical Ratings
- Rated voltage: up to 690V
- Rated current: up to 6300A
- Breaking capacity: up to 100kA or higher
Protection Features
- Overload protection
- Short circuit protection
- Short-time delay protection
- Ground fault protection
Trip Unit Types
- Thermal-magnetic trip units
- Electronic trip units with adjustable settings
- Digital monitoring and protection systems
Applications of Air Circuit Breakers
Project References & Global Applications
“We’ve been using Wondon ACBs in our low-voltage panels for a while now, and they’ve been very reliable. No tripping issues and the quality feels solid.”
“Good experience overall. The breakers were easy to install and have been working smoothly under heavy industrial load.”
“We chose Wondon air circuit breakers for a project upgrade, and so far everything runs stable. Their support team was also quick to respond when we had questions.”
FAQs about Air Circuit Breakers
1. What is an air circuit breaker?
An air circuit breaker is a low-voltage device that protects electrical systems from overload, short circuit, and faults.
2. What is the main function of an ACB?
The main function is to automatically interrupt the circuit during abnormal conditions to ensure system safety.
3. Where are air circuit breakers used?
They are widely used in factories, buildings, substations, and large low-voltage distribution systems.
4. What is the difference between ACB and MCCB?
ACB is used for higher current capacity, while MCCB is used for smaller load protection.
5. What are the advantages of ACB?
It offers high breaking capacity, reliable protection, easy maintenance, and long service life.
We are the Wondon sales team. Share your project details and requirements with us, and we’ll provide timely consultation and quoting services.
Qiang Chen
Chief Executive Officer
Tracy Lee
Operations Specialist
Hannah Wu
Sales
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