ACB

What This Model Does

The ACB is a three- or four-pole, fixed or draw-out type circuit breaker for AC 50Hz/60Hz systems with rated voltages up to 690V and rated currents from 630A to 6300A. It provides overload, short-circuit, under-voltage, and single-phase earth fault protection for power distribution in industrial, commercial and high-rise building applications. The breaker is built to IEC60947-2 and GB14048.2, and includes intelligent protection with selectable trip types and communication-ready controller options. It is suitable for use in power stations, factories, mines (for 690V), and intelligentized buildings where selective protection and reliable power continuity are required.

Key Benefits

• Protects high-current circuits up to 6300A with short-circuit breaking capacity up to 120KA
• Supports both fixed and draw-out configurations for flexible installation and maintenance
• Intelligent controller options (L, M, H types) allow for selective protection and remote monitoring
• Reduces unnecessary power outages through intelligent trip logic and selective coordination
• Meets CCC certification across the entire series for compliance in regulated markets
• High contact system stability with parallel connection and contact gap over 18mm to reduce dynamic forces

How It Is Built

• Rated AC current from 630A to 6300A with 6300A rack rating
• Short-circuit breaking capacity from 80KA to 120KA depending on model
• Rated voltage up to AC 690V at 50/60Hz
• Available in 3-pole and 4-pole configurations
• Two types: fixed type and draw-out type with dedicated holder structure
• Operation types: manual and automatic operation
• Trip types: intelligent controller, under-voltage instant or time-delay trip, shunt trip
• Intelligent controller categories: L (basic), M (standard), H (communication-ready)
• Integrated contact system with main and arc contacts made from high-quality materials
• Parallel contact connection reduces electrical dynamic repulsion forces
• Contact gap greater than 18mm for improved arc separation
• Arc-extinguishing chamber per pole for effective arc isolation

Materials and Construction

• High-quality contact material for main and arc contacts to prevent overheating during short-circuit interruption
• Flame-retardant housing and insulating components for arc-extinguishing chamber and terminal areas
• Steel and aluminum alloy used in structural components including side plates, base, and beams
• Integrated contact system with precision-machined parts for consistent performance
• Secondary plug and socket assembly for reliable signal and control connection

Quality Control

• Trip characteristic verification against IEC60947-2 and GB14048.2 requirements
• Short-circuit breaking capacity tested at rated 80KA to 120KA
• Mechanical and electrical operation life tested to meet design specifications
• Insulation and dielectric withstand test performed on every unit
• Controller communication and protection logic verified in H-type models
• CCC certification confirmed for all units in the series

How It Compares

Use Guide

1. Install the fixed or draw-out type breaker in the designated panel or switchgear cabinet
2. Connect the incoming and outgoing conductors to the appropriate terminals
3. Ensure the isolating switch is installed and functional as required
4. Select the appropriate controller type (L, M, H) based on protection and monitoring needs
5. Configure trip settings and communication parameters via the controller interface
6. Test operation manually and verify trip response under load
7. Perform dielectric and insulation tests before energizing the circuit
8. Keep the trip lock device optional and install as needed for safety