Reliable Air Circuit Breaker Protection for Main Circuits Manufactured by XENHO
As a professional manufacturer and supplier in China, XENHO would like to provide you high quality Air Circuit Breaker (ACB), whcih is a core protection device for low-voltage systems, widely used in 400V/690V networks with currents from 400A to 6300A. It delivers reliable protection against overload, short circuit, undervoltage, and ground faults while supporting infrequent operational control.
What is an Air Circuit Breaker (ACB)?
An Air Circuit Breaker is a low-voltage electrical protection device that uses air as the arc extinguishing medium. It ensures safe distribution of electrical power by automatically interrupting fault currents and maintaining system stability. In modern power systems, Air Circuit Breaker units are essential for protecting equipment and ensuring operational continuity.
Product Types
I. Classification by Installation Structure
1. Fixed ACB
A fixed Air Circuit Breaker is permanently mounted inside the cabinet.
Compact structure and reduced installation space
Lower initial investment, suitable for budget-sensitive projects
Applied in small factories and standard building distribution rooms
2. Drawer-Type ACB
A drawer-type Air Circuit Breaker allows easy insertion and removal.
Three positions: connected, test, and isolated
Maintenance without disconnecting main wiring
Common in data centers, industrial plants, and commercial buildings
II. Classification by Number of Poles
1. Three-Pole (3P) ACB
Designed for three-phase systems without neutral control.
Controls L1, L2, L3 phases only
Suitable for motors, transformers, and industrial loads
2. Four-Pole (4P) ACB
Includes neutral pole protection.
Ensures full disconnection including neutral line
Used in buildings, hospitals, and commercial complexes
III. Operation and Control Methods
1. Manual Operation (MDO)
Manual charging and switching
Simple structure and stable performance
Suitable for basic distribution without automation
2. Electrically Operated (EDO)
Motor-driven mechanism
Supports PLC, BMS, SCADA integration
Enables remote monitoring and control
IV. Protection Trip Unit Types
1. Thermal-Magnetic Trip Unit
Thermal protection for overload
Magnetic protection for short circuit
Fixed parameters, suitable for traditional environments
2. Intelligent Electronic Trip Unit
Microprocessor-based control
Supports LSI and LSIG protection
Features monitoring, fault recording, and communication
V. Arc Extinguishing Technology
1. Magnetic Blowout Type
Uses magnetic force to elongate the arc
Suitable for moderate fault currents
2. Grid Arc Extinguishing Type
Divides arc into smaller segments
High breaking capacity and efficiency
Standard in modern Air Circuit Breaker designs
Application Scenarios
The Air Circuit Breaker is applied across multiple sectors:
Industrial manufacturing power distribution
Commercial buildings and infrastructure
Data centers requiring stable power supply
Energy and utility systems
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W2 Air Circuit Breaker
Buy quality W2 Air Circuit Breaker from XENHO in China, is a high-capacity low-voltage protection device designed for industrial power distribution systems. With rated currents from 630A to 6300A, it ensures reliable protection against overload, short circuit, and under-voltage conditions. Built in compliance with IEC 60947 standards, it is widely used in power plants, factories, and commercial buildings.
DW45 Air Circuit Breaker
Buy quality DW45 Air Circuit Breaker from XENHO in China. It uses new zero-flying-arc technology with breaking capacity up to 100kA. It provides complete overload, short circuit and undervoltage protection. With silver-tungsten contacts and modular design, it offers 30,000 mechanical life and 10,000 electrical life for heavy-duty industrial use.
W1 Air Circuit Breaker
XENHO, a professional manufacturer in China, our customized W1 Air Circuit Breaker is a premium intelligent ACB with outstanding breaking performance and stable protection. It adopts modular design and smart monitoring, suitable for main distribution lines and key equipment. With IEC compliance and global certifications, it works reliably in harsh environments
1600A Air Circuit Breaker
Purchase quality 1600A Air Circuit Breaker from XENHO, a professional manufacturer in China, delivers reliable overload, short circuit and undervoltage protection for low-voltage power systems. Adopting air arc extinguishing and modular structure, it meets IEC standards with CB/CE/RoHS certifications. Suitable for main lines and critical equipment, it features fast breaking, long life and strong anti-interference for stable industrial operation.
XENHO as a professional manufacturer and supplier of quality Air Circuit Breaker in China. With our own factory, we provide customized services and look forward to partnering with you.
