Air Circuit Breakers
CHINT NXA ACB Series
Circuit breakers to protect lines up to 6300A
Masterpact NW
Circuit breakers to protect lines up to 6300A
Masterpact for Direct Current
Circuit breakers to protect lines up to 4000A, certified for Navy applications
Masterpact NT
Circuit breakers to protect lines up to 1600A in a compact frame
Masterpact for Navy
Circuit breakers to protect lines up to 4000A, certified for Navy applications
Masterpact for MTZ
Circuit breakers to protect lines up to 6300A, offering advanced digital features
Micrologic
Electronic control units for Masterpact NT/NW/UR and for Compact NS
Masterpact UR
Ultra-fast circuit breakers, to protect lines up to 5000 and 6000 A, under extremely powerful energy supply conditions.
Air Circuit Breakers (ACBs) – High-Performance Protection for Critical Power Systems
Our ACBs deliver advanced protection, intelligent energy monitoring, and high breaking capacity for low-voltage distribution networks in industrial, commercial, and infrastructure environments. Designed for durability and ease of integration, they offer a future-ready solution for demanding electrical systems.
Key Features
- Wide Current and Breaking Capacity Range
Covers applications from 800A to 6300A with breaking capacities from 42kA to 150kA at 220/415V AC.
Rated up to 1150V AC, suitable for high-load installations. - Flexible Configurations
Available in 3-pole and 4-pole, fixed or draw-out types.
Two frame sizes simplify panel design:- Size 1: 800A–4000A
- Size 2: 4000A–6300A
- Smart Microprocessor-Based Protection
Equipped with MicroLogic trip units offering:- Adjustable protection (LI, LSI, LSIG, LSIV)
- Built-in earth leakage, overload, and short circuit protection
- Measurement of current, voltage, energy, power, and harmonics
- ERMS (Energy Reduction Maintenance Setting) for arc flash safety
- Built-In Metering & Monitoring
MicroLogic units support local and remote communication via Ethernet or Modbus, enabling energy tracking, event diagnostics, and preventive maintenance. - Comprehensive Accessories & Compliance
Field-installable auxiliaries, switch disconnectors, and communication modules.
Global certifications: IEC 60947, UL489, ANSI/UL1066, CCC, EAC, and more.
Marine compliance: BV, Lloyd’s Register, DNV, etc.
Benefits
- Smart Energy Management
Real-time monitoring and communication allow energy analysis, preventive diagnostics, and cost optimization. - Robust Safety & Continuity
High fault-breaking capability and adjustable trip units ensure complete protection and minimal downtime. - Adaptable & Upgradeable
Interchangeable trip units and universal accessories streamline maintenance and future system upgrades. - Global Compatibility
Suitable for all international applications, thanks to wide standards compliance and flexible mounting options.
Applications
Ideal for protection, measurement, and monitoring in:
- Industrial Plants – Cement, mining, automotive, food, and beverage
- Oil & Gas – Extraction, refining, and processing sites
- Data Centers – Mission-critical systems requiring uninterrupted power
- Healthcare – Hospitals and medical infrastructure
- Transportation & Utilities – Airports, tunnels, metro systems, power stations
- Marine & Offshore – Ships, rigs, and coastal installations
- Green Energy – Wind turbines, solar farms, and hybrid gensets
- Special Environments – Corrosive, DC networks, high-altitude, or ultra-fast interruption needs